阅读说明：本技术 具有减少的相位延迟的液体透镜控制系统及方法 (The liquid lens control system and method for phase delay with reduction ) 是由 雷蒙德·米勒·卡拉姆 于 2019-05-21 设计创作，主要内容包括：液体透镜包括诸如陀螺仪之类的方位传感器,以补偿运动的影响。包括噪声分量的原始陀螺仪信号可以被提供至控制器,而不被相移滤波器处理。一个或多个滤波器可以被应用于所述原始陀螺仪信号以允许一频带通过,而不会引入相位延迟。所述控制器可以使用前馈系统,以至少部分地基于包括噪声分量的原始陀螺仪信号产生控制输出信号。所述控制输出信号可被用于将电压信号驱动到电极以补偿运动。(Liquid lens includes the aspect sensor of such as gyroscope etc, with the influence of compensation campaign.Original gyroscope signal including noise component(s) can be provided to controller, without being phase-shifted filter process.One or more filters can be applied to the original gyroscope signal to allow a frequency band to pass through, without introducing phase delay.Feedforward system can be used in the controller, generates control output signal to be based at least partially on the original gyroscope signal including noise component(s).The control output signal can be used for driving voltage signal to electrode with compensation campaign.)

1. a kind of liquid lens system, comprising:

Liquid lens, comprising:

Chamber；

Include first fluid in the cavity；

Comprising second fluid in the cavity, wherein the first fluid and the second fluid are substantially immiscible , to form fluid boundary between the first fluid and the second fluid；

The one or more insulating electrodes to insulate with the first fluid and the second fluid；With

With one or more electrodes of the first fluid telecommunication, wherein the position of the fluid boundary is based at least partially on Apply in one or more of insulating electrodes and between one or more of electrodes of the first fluid telecommunication Voltage；

Wherein the liquid lens has response frequency；

Gyroscope is configured to generate gyroscope signal with the gyroscope frequency faster than the response frequency of the liquid lens, wherein The gyroscope signal indicates vibration and the gyroscope signal includes noise；With

Controller, construction are as follows:

Using low-pass filter with the gyroscope signal for being more than upper threshold frequency of decaying, under decaying and be lower than using high-pass filter The gyroscope signal of frequency threshold has to generate no more than 20 degree of phase delay treated gyroscope signal, wherein Gyroscope signal between the upper threshold frequency and the lower frequency threshold value is not filtered；And

The unfiltered gyroscope signal being based at least partially between the upper threshold frequency and the lower frequency threshold value, with The frequency of drives faster than the response frequency of the liquid lens generates liquid lens actuator voltage signal.

2. liquid lens system according to claim 1, wherein bandpass filter includes the high-pass filter and described Low-pass filter.

3. liquid lens system according to claim 1 further includes accumulation buffer, the gyroscope signal is received simultaneously And the cumulative of multiple gyroscope signals is provided to the controller.

4. liquid lens system according to any one of claims 1 to 3, wherein at least it is based in part on and described does not filter The frequency of drives for the actuator voltage signal that the gyroscope signal of wave generates is at least than the sound of the liquid lens Answer about 5 times fastly of frequency.

5. liquid lens system according to claim 1 is wherein at least based in part on the unfiltered gyroscope letter The frequency of drives of number actuator voltage signal generated is at least than the response frequency of the liquid lens fastly about 25 Times.

6. liquid lens system according to claim 1 is wherein at least based in part on the unfiltered gyroscope letter The frequency of drives of number actuator voltage signal generated is at least than the response frequency of the liquid lens fastly about 50 Times.

7. liquid lens system according to claim 1 is wherein at least based in part on the unfiltered gyroscope letter The frequency of drives of number actuator voltage signal generated than the liquid lens response frequency fastly no more than about 1000 times.

8. liquid lens system according to any one of claims 1 to 7, wherein for generating the actuator voltage The unfiltered gyroscope signal of signal has the noise power spectral density of the every square root Hz of at least about 4mdps.

9. liquid lens system according to any one of claims 1 to 7, wherein the liquid lens, which is used as, is used for institute It states the filter of gyroscope signal and operates.

10. a kind of method that driving has the liquid lens of fluid boundary, which comprises

The first gyroscope signal is obtained in first time；

Be based at least partially on first gyroscope signal and determine first control signal, the first control signal be configured to by The fluid boundary of the liquid lens is set at first position；

The first control signal is applied to the liquid lens, to drive the fluid boundary towards the first position；

The second gyroscope signal is obtained in the second time；

Be based at least partially on second gyroscope signal and determine second control signal, the second control signal be configured to by The fluid boundary of the liquid lens is set to the second place；And

The second control signal is applied to the liquid lens before the fluid boundary reaches the first position, with It interrupts the fluid boundary and drives the fluid boundary towards the movement of the first position and towards the second position；

Wherein the liquid lens have than obtain first gyroscope signal and obtain second gyroscope signal it Between long response time time so that the liquid lens is operated as the filter for being used for the gyroscope signal.

11. according to the method described in claim 10, further including that low-pass filter and/or high-pass filter are applied to the top Spiral shell instrument signal.

12. method described in any one of 0 to 11 according to claim 1, wherein the liquid lens response time ratio is obtaining The time between first gyroscope signal and acquisition second gyroscope signal is obtained to 5 times of the youthful and the elderly.

13. method described in any one of 0 to 11 according to claim 1, wherein the liquid lens response time ratio is obtaining The time between first gyroscope signal and acquisition second gyroscope signal is obtained to 25 times of the youthful and the elderly.

14. method described in any one of 0 to 11 according to claim 1, wherein the liquid lens response time ratio is obtaining The time between first gyroscope signal and acquisition second gyroscope signal is obtained to 50 times of the youthful and the elderly.

15. method described in any one of 0 to 11 according to claim 1, wherein the liquid lens response time ratio is obtaining The time for obtaining first gyroscope signal and obtaining between second gyroscope signal is long no more than 1000 times.

16. a kind of zoomar, the system comprises:

Lens of variable focal length with response frequency；

Aspect sensor is configured to provide for indicating the signal in its movement and/or orientation, wherein the aspect sensor be configured to The frequency faster than the response frequency of the lens of variable focal length provides the signal；With

Controller is configured at the signal offer driver signal being based in part on from the aspect sensor, and And the driver signal is delivered to the fast frequency of drives of the response frequency than the lens of variable focal length described Lens of variable focal length.

17. a kind of zoomar, the system comprises:

Lens of variable focal length；

Aspect sensor is configured to provide for indicating the signal of its movement and/or orientation；And

Controller is configured to handle the signal from the aspect sensor, to provide the phase having no more than 20 degree Delay treated signal, wherein the controller is based at least partially on, described treated that signal provides driver letter Number.

18. a kind of zoomar, the system comprises:

Lens of variable focal length；

Aspect sensor is configured to provide for indicating the signal of its movement and/or orientation, wherein the signal includes noise；And

Controller is configured at and is based in part on the signal generation from the aspect sensor for described varifocal Driver signal away from lens, wherein including unfiltered for generating at least part of the signal of the driver signal Noise.

19. a kind of zoomar, the system comprises:

Lens of variable focal length；

Aspect sensor is configured to provide for indicating the signal of its movement and/or orientation, wherein the signal includes noise；And

Controller is configured at and is based in part on the signal generation from the aspect sensor for described varifocal Driver signal away from lens, the signal from the aspect sensor are made an uproar with the every square root Hz's of at least about 4mdps Power sound spectrum density.

20. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein the lens of variable focal length It is operated as the filter for the aspect sensor signal.

21. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein the frequency of drives is extremely Few about 5 times fastly of response frequency than the lens of variable focal length.

22. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein the frequency of drives is extremely Few about 25 times fastly of response frequency than the lens of variable focal length.

23. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein the frequency of drives is extremely Few about 50 times fastly of response frequency than the lens of variable focal length.

24. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein frequency of drives ratio The response frequency of the lens of variable focal length is no more than 1000 times fastly.

25. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein the system be configured to by Bandpass filter is applied to the signal from the aspect sensor, and wherein basic by the signal in band gap On be unfiltered.

26. variable-focus lens system according to claim 25, wherein the bandpass filter is by software application.

27. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein the system is not to coming from The signal of the aspect sensor executes any hardware based filtering.

28. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein the aspect sensor packet Include gyroscope.

29. variable-focus lens system described in any one of 6 to 19 according to claim 1, wherein the lens of variable focal length Including liquid lens, the liquid lens includes:

Chamber；

Include first fluid in the cavity；

Comprising second fluid in the cavity, wherein the first fluid and the second fluid are substantially immiscible , to form fluid boundary between the first fluid and the second fluid；

The one or more insulating electrodes to insulate with the first fluid and the second fluid；With

With one or more electrodes of the first fluid telecommunication, wherein the liquid lens is configured such that the fluid The position at interface is at least partially based on the institute in one or more of insulating electrodes and with the first fluid telecommunication State the voltage applied between one or more electrodes.

30. variable-focus lens system according to claim 29, wherein one or more of insulating electrodes include setting Four insulating electrodes at four quadrants of the liquid lens.

Technical field

Some embodiments of the disclosure are related to liquid lens and control system and control method for liquid lens. More specifically, some example discussion herein for liquid lens is adjusted for stability and/or in response to from position or One or more signals of person's motion indicator (such as gyroscope) and the control system and control method positioned.

Detailed description of the invention

Fig. 1 is the cross-sectional view of an illustrative embodiments of liquid lens.

Fig. 2 shows in the liquid lens being applied under the second state of voltage.

Fig. 3 shows the plan view of an illustrative embodiments of liquid lens.

Fig. 4 shows the cross-sectional view obtained across comparative electrode.

Fig. 5 be include liquid lens camera arrangement illustrative embodiments block diagram.

Fig. 6 shows example camera arrangement.

Fig. 7 A shows the block diagram of example control system.

Fig. 7 B shows the block diagram of another example control system.

Fig. 7 C shows the block diagram of another example control system.

Specific embodiment

Liquid lens system

Fig. 1 is the cross-sectional view of an illustrative embodiments of liquid lens 10.Liquid lens 10 can have cavity 12, empty Chamber 12 includes at least two fluids (for example, liquid), such as first fluid 14 and second fluid 16.Described two fluids can be with base It is immiscible in sheet, so that forming fluid boundary 15 between first fluid 14 and second fluid 16.Two kinds of fluids 14 and 16 can To be fully immiscible, so that fluid boundary 15 can be used as the lens with optical power when fluid boundary 15 is bent Reflect light.First fluid 14 can be conduction, and second fluid 16 can be electrical isolation.In some embodiments, first Fluid 14 can be polar fluid, such as aqueous solution.In some embodiments, second fluid 16 can be oil.First fluid 14 can have the dielectric constant higher than second fluid 16.First fluid 14 and second fluid 16 can have different refractions Rate, such as allow to reflect light when light passes through fluid boundary 15.First fluid 14 and second fluid 16 can have substantially Upper similar density, this may interfere with any one of fluid 14 and 16 relative to another floating.

Cavity 12 may include having truncated pyramid (frustum) or truncated cone (truncated cone) A part of shape.Cavity 12 can have angled side wall.Cavity 12 can have wherein side wall be close together it is narrow Part and the wide portion that wherein side wall is kept away from.In the orientation shown, the narrow portion be can be positioned at the bottom end of cavity 12, Wide portion can be located at the top of cavity 12, but liquid lens 10 disclosed herein can be with various other orientation.Fluid circle The edge in face 15 can contact the angled side wall of cavity 12.The edge of fluid boundary 15, which can contact the described of cavity 12, to be had The part of truncated pyramid or frustoconical shape.Various other cavity shapes can be used.For example, the cavity can be with With curved side wall (for example, being bent in the mode in the cross-sectional view of Fig. 1-2).The side wall can meet sphere, annular (toroid) or the shape of a part of other geometries.In some embodiments, cavity 12 can have cylindrical body Shape.In some embodiments, the cavity can have flat surfaces, and the fluid boundary can contact the flat table Face (for example, as drop second fluid 16 on the matrix for being located at cavity 12).

The lower window 18 that may include transparent panel can be below cavity 12.Upper window 20 may include transparent panel, upper window Mouth 20 can be above cavity 12.Lower window 18 can be located at or can close to the narrow portion and/or upper window 20 of cavity 12 Be located at or close to cavity 12 wide portion.Lower window 18 and/or upper window 20 are it is so structured that pass therethrough light.Under Window 18 and/or upper window 20 can be by the imaging sensors of enough light transmissions to such as camera, to form image.In Under some cases, lower window 18 and/or upper window 20 can be absorbed and/or reflect a part of light incident thereon.

The first one or more electrode 22 (for example, insulating electrode) can be for example by insulating materials 24 and cavity 12 Fluid 14 and 16 insulate.Second of one or more electrode 26 can be with 14 telecommunication of first fluid.Second one or more A electrode 26 can be contacted with first fluid 14.In some embodiments, second of one or more electrode 26 can be with capacitor It is coupled to first fluid 14.Voltage can be applied between electrode 22 and 26, to control the fluid boundary between fluid 14 and 16 15 shape, to change the focal length of liquid lens 10.Direct current (DC) voltage signal can be provided to one of electrode 22 and 26 or Both persons.Alternating current (AC) voltage signal can be provided to one of electrode 22 and 26 or both.Liquid lens 10 can be right It is made a response by root mean square (RMS) voltage signal that the alternating voltage applied generates.In some embodiments, alternating voltage is believed The stored charge in liquid lens 10 number can be prevented, this charge accumulated may go out in the occasion using DC voltage It is existing.In some embodiments, first fluid 14 and/or second of one or more electrode 26 can be grounded.In some implementations In mode, the first one or more electrode 22 can be grounded.In some embodiments, voltage can be applied to the first electricity Both pole 22 or second electrode 26, but be not applied to, to generate voltage residual quantity.In some embodiments, voltage signal can To be applied to both first electrode 22 and second electrode 26, to generate voltage residual quantity.

Fig. 1 is shown is not applying the liquid lens 10 under alive first state wherein between electrode 22 and 26, and Fig. 2 shows Liquid lens 10 in the case where wherein applying alive second state between electrode 22 and 26 out.Chamber 12 can have by hydrophobic One or more side wall made of property material.Such as insulating materials 24 can be Parylene (parylene), it can be It is insulation and hydrophobic, but various other suitable materials can be used.When no voltage is applied, the hydrophobicity on side wall Material can repel first fluid 14 (such as aqueous solution), so that second fluid 16 (such as oil) can cover the opposite of side wall Biggish area, to generate 15 shape of fluid boundary shown in Fig. 1.When applying between first electrode 22 and first fluid 14 When voltage (such as via second electrode 26), first fluid 14 can be attracted to first electrode 22, this can be with drives edge The down-set fluid boundary 15 of side wall, so that more side walls contact first fluid 14.Changing applied voltage residual quantity can be with Principle based on electrowetting changes the contact angle between the edge of fluid boundary 15 and the surface of cavity 12 (for example, cavity 12 The angled side wall of truncated cone part).It, can be by fluid circle by applying different voltages between electrode 22 and 26 For the driving of face 15 to various different locations, this can produce different focal length or different amount of optical power for liquid lens 10.

Fig. 3 shows the plan view of an illustrative embodiments of liquid lens 10.In some embodiments, the first one A or multiple electrodes 22 (for example, insulating electrode) may include the multiple electrodes at the multiple positions being arranged on liquid lens 10 22.Liquid lens 10 can have four electrodes 22a, 22b, 22c and 22d, and four electrodes can be set in liquid lens 10 In four quadrants.In other embodiments, the first one or more electrode 22 may include the electrode (example of various numbers Such as, 1 electrode, 2 electrodes, 4 electrodes, 6 electrodes, 8 electrodes, 12 electrodes, 16 electrodes, 32 electrodes or more, Or any value between these).Although, can also be with there is provided herein the various examples with even number insulating electrode 22 Use odd number insulating electrode 22.Electrode 22a-d can be separately driven (for example, applying to electrode same or different Voltage), this can be used for the different location being located in fluid boundary 15 in the different piece (for example, quadrant) of liquid lens 10 Place.Fig. 4 shows the cross-sectional view obtained across comparative electrode 22a and 22c.If more voltages applied compared with electrode 22a It is added to electrode 22c, then as shown in figure 4, compared at the quadrant in electrode 22a, fluid boundary 15 can at the quadrant of electrode 22c Further to be dragged down along side wall.

Inclined fluid boundary 15 can make the light deflection for being transmitted through liquid lens 10.Liquid lens 10 can have Axis 28.Axis 28 can be at least part of symmetry axis for liquid lens 10.For example, cavity 12 can be basically about axis 28 rotational symmetry.The truncated cone part of cavity 12 can be basically about 28 rotational symmetry of axis.It is saturating that axis 28 can be liquid The optical axis of mirror 10.For example, curved and inclined fluid boundary 15 can be with converging light towards axis 28, or dissipate light far from axis 28.In some embodiments, axis 28 can be the longitudinal axis of liquid lens 10.Inclination fluid boundary 15 can make across inclination Fluid boundary light 30 relative to axis 28 deflect an optical tilt 32.Light 30 across inclined fluid boundary 15 can Poly- direction is dissipated far from a direction, and the direction is inclined relative to the direction angulation that light enters liquid lens 10 for optics Oblique angle 32.Fluid boundary 15 can tilt a physical slant angle 34, and this generates optical tilts 32.Optical tilt 32 and object Relationship between reason inclination angle 34 is at least partially dependent on the refractive index of fluid 14 and 16.

It can be used by camera arrangement by the optical tilt 32 that inclination fluid boundary 15 generates, to provide optical picture As stable, off-axis focusing etc..In some cases, different voltage can be applied to electrode 22a-d, be applied to compensation The power of liquid lens 10, so that liquid lens 10 keeps coaxial focusing.Voltage can be applied to control the song of fluid boundary 15 Rate to generate desired optical power or focal length, and controls the inclination of fluid boundary 15, inclines to generate desired optics Tiltedly (such as optical tilt direction and optical tilt amount).Accordingly, liquid lens 10 can be used for camera arrangement, variable to generate Focal length, while realizing optical image stabilization.

Camera arrangement

Fig. 5 be include liquid lens 10 camera arrangement 200 illustrative embodiments block diagram, the liquid lens 10 may include the feature of any liquid lens embodiment disclosed herein.Camera arrangement 200 may include imaging sensing Device 202, imaging sensor 202 can be used for the light by being incident on imaging sensor 202 and generate image.Imaging sensor 202 can be charge-coupled device (CCD) sensor, complementary metal oxide semiconductor (CMOS) sensor or it is any its The electronic imaging sensor that he is suitable for.In some embodiments, photographic film can be used and generate image, or can be used The imaging sensor of any other suitable type generates image.Light can be directed towards imaging sensor by liquid lens 10 202.In some embodiments, camera arrangement 200 may include one or more additional optical element 204, for pair The light propagated towards imaging sensor 202 is operated.Optical element 204 may include one or more fixed lens (for example, Fixed lens group), one or more movable lens, one or more optical filters, or for generating expectation optics effect Any other the suitable optical element answered.Liquid lens 10 can be before one or more optical elements 204 to propagation court It is operated to the light of imaging sensor 202, to propagating towards imaging sensor after one or more optical elements 204 202 light is operated or liquid lens 10 can be located optically between optical element 204.When light described herein is When propagation towards a component (for example, towards imaging sensor 202), the light can be along directly or indirectly leading to To the propagated of the component.For example, light can be while along paths towards imaging sensor 202, along One direction pass through liquid lens 10, and the light can be redirected (for example, by mirror reflect and/or by refraction it is inclined Turn) it is that in second direction, (second direction can be different from first direction, or even can along the optical path towards imaging sensor 202 With opposite with first direction) on continue on.

Camera arrangement 200 may include the controller 206 for operating liquid lens 10, disclosed herein for example to realize Liquid lens feature and function.Controller 206 can also operate other aspects of camera arrangement 200.For example, single control Device 206 processed can operate imaging sensor 202 with operating liquid lens 10, can store and generated by imaging sensor 202 Image can operate other component of camera, such as display, shutter, user interface etc..In some embodiments, The various aspects of the controller operation camera arrangement 200 of any suitable number can be used.Controller 206 can believe voltage Number output is to liquid lens 10.For example, controller 206 can export voltage signal to insulating electrode 22 and/or and electrical conduction current The electrode of 14 telecommunication of body, and voltage signal can control the curvature of fluid boundary 15 (such as to generate desired smooth function Rate) and/or control fluid boundary 15 inclination (for example, to generate desired optical tilt).Controller 206 can export directly Flow voltage signal, ac voltage signal, pulsed dc voltage signal or any other be suitable for drive liquid lens 10 signal.

Controller 206 may include at least one processor 208.Processor 208 can be hardware processor.Processor 208 can be computer processor.Processor 208 can be communicated with computer-readable memory 210.Memory 210 can be Non-transitory computer-readable memory 210.Memory 210 may include one or more memory elements, and memory element can be with It is same or different type.Memory 210 may include hard disk, flash memory, RAM memory, ROM memory or appoint The what computer-readable memory 210 of his proper types.Processor 206 can execute the calculating of storage in memory 210 Machine readable instruction 212, to realize functionality disclosed herein.In some embodiments, processor 208 can be general procedure Device.In some embodiments, it is to realize the dedicated processes of functionality disclosed herein that processor 208, which can be special configuration, Device.Processor 208 can be specific integrated circuit (ASIC) and/or may include being configured to execute functionality disclosed herein Other circuits, so as to operating liquid lens 10 as discussed herein.

Memory 210 may include one or more look-up tables 214, and look-up table 214 can be used to determine to be applied to liquid The voltage signal of body lens 10.Processor 208 is it is so structured that implement determining the voltage signal to be applied to liquid lens 10 When the one or more algorithms, equation or the formula that use and/or the computer-readable instruction 212 may include described One or more algorithms, equation or formula.Processor 208 can determine (such as to be made to be applied to the voltage of liquid lens 10 With one or more look-up tables 214 and/or one or more algorithms, equation or formula).Other information, which can store, to be stored In device 210, for example, the image generated by camera arrangement 200, the instruction of the other component for operating camera arrangement 200, Etc..

Controller 206 may include signal generator 216, and signal generator 216 can produce to be supplied to liquid lens 10 voltage signal.Signal generator 216 can generate voltage signal in response to the voltage value that is determined by processor 208.Letter Number generator 216 may include one or more amplifiers, switch, H bridge, half bridge, rectifier and/or for generating voltage Any other suitable circuit of signal.Power supply 218 can be used for generating the voltage signal to be supplied to liquid lens 10.Power supply 218 can be battery, DC power supply, AC power supplies or any suitable electric power source.Signal generator 216 can connect from power supply 218 Electric power is received, and can modulate or modify electric signal (for example, based on the determination made by processor 208), to provide driving Signal is to liquid lens 10.In some embodiments, processor 208 and signal generator 216 can be in single integrated circuits (IC) it is realized together in or in combinational circuit.

In some embodiments, controller 206 can be received from aspect sensor 220 and be inputted, and aspect sensor 220 compares In this way gyroscope, accelerometer and/or other be adapted to provide for the orientation about camera arrangement 200 and/or liquid lens 10 The sensor of information.In some embodiments, aspect sensor 220 can be MEMS (microelectromechanical-systems) equipment.Orientation passes Sensor 220 can provide the measurement of angular speed, acceleration, or can be used to determine the expectation optical tilt of liquid lens 10 Any suitable measurement.In some cases, (such as in response to by human hand held, or carry out self-driving when camera arrangement 200 rocks Sail the vibration, etc. of automobile) when, aspect sensor 220 (such as gyroscope) can will be provided to control about the input rocked Device 206 processed, and liquid lens 10 can be actuated to inclination (such as inclined direction and the inclination by controlling fluid boundary 15 Amount) and at least partly fight rocking for camera arrangement 200.

Controller 206 (for example, using processor 208) can be based at least partially on received from aspect sensor 220 Input, determines optical tilt amount (for example, angle 32) and/or optical tilt direction (for example, angle), but in some embodiment party In formula, these parameters can be received by liquid lens controller 206 (for example, by aspect sensor 220 or camera arrangement 200 some other component determines).It can be based at least partially on optical tilt amount and/or optical tilt direction, determination is used for Drive the signal (for example, voltage signal) of liquid lens 10.In some cases, controller 206 is (for example, use processor 208) physical slant amount (for example, angle 34) and/or physical slant direction can be determined (for example, orientation for fluid boundary 15 Angle).These can determine according to optical tilt amount and/or optical tilt direction, or can be directly according to from sensing directional The received input of device 220 determines.Controller 206 (for example, using processor 208) can be determined for electrode (for example, Fig. 3 Insulating electrode 22a-d in embodiment) driver signal (for example, voltage), to realize the physical slant of fluid boundary 15. In some embodiments, driver signal can be determined directly according to from the received input of aspect sensor 220, such as Desired optical tilt is not known, the physical slant of desired fluid boundary 15 is not known, and/or is not known among any other Value or parameter.

Many variations are admissible.In some embodiments, aspect sensor 220 can be omitted.For example, camera System 200 can execute optical image stabilization (OIS) in response to image analysis or any other suitable method.Controller 206 can receive OIS input information (for example, exporting by any suitable method), and can input information in response to OIS Control the inclination of fluid boundary 15.In some cases, lens tilt can be used for the purpose in addition to OIS, such as For off-axis image.For example, camera arrangement 200 can be scaled to one not be located at the picture centre of image Point.The inclination for controlling the fluid boundary 15 of liquid lens 10 can be used at least partially for controlling for optical zoom off-centered Direction and amount.Although being not shown in Fig. 5, each embodiment disclosed herein may include two liquid lens, such as in order to Realize optical zoom.Controller 206 can receive focus direction input information (for example, for OIS or off-axis imaging), And the inclination of information control flow body interface 15 can be inputted in response to focus direction.

Controller 206 can receive op-tical power information.The op-tical power information of input may include target optical power (for example, Diopter), target focal length, or can be used to determine the other information of the curvature of fluid boundary 15.Op-tical power information can lead to The autofocus system 222 for crossing camera arrangement 200 determines, (can arrive camera for example, providing by input from the user The user interface of system 200) setting, or provided from any other source.In some embodiments, controller 206 can be true Determine op-tical power information.For example, controller 206 can be used for realizing the autofocus system for determining expectation optical power or focal length. In some cases, controller 206 can receive op-tical power information, and can determine the correspondence optical power of liquid lens 10, Such as since another optical element 204 can also influence optical power (for example, statically or dynamically).206 (example of controller Such as, using processor 208) it can be it is later determined that the driver signal (for example, voltage) of electrode be used for, to control fluid boundary 15 Curvature.In some cases, controller 206 can be directly according to automatic focus data or directly according to op-tical power information And determine the driver signal, for example do not know the value of the optical power of liquid lens and/or do not know any other median.

Controller 206 (for example, using processor 208) can be used together focus direction information (for example, OIS information, side Position information rocks information, etc.) and focus information (for example, op-tical power information, automatic focus information, etc.), it determines for liquid The driver signal of body lens 10.For example, the driver signal of 1 optical tilt degree and 3 diopters for generating optical power can To be different from the driver signal for generating 1 optical tilt degree and 5 diopters of optical power.Various look-up tables can be used 214, formula, equation and/or algorithm determine driver signal based on focus information and focus direction both information.

In some embodiments, controller 206 can receive feedback, and can be based at least partially on feedback drive Dynamic liquid lens 10.The close-loop control scheme for driving liquid lens 10 can be used in controller 206.In some embodiments In, information can be provided to controller, such as position of the fluid boundary 15 in liquid lens 10 by one or more sensors 224 The relevant information set.Sensor 224 can provide the relevant information of fluid boundary position for each insulating electrode 22a-d.For example, Sensor 224 can provide a feedback signal, indicate the capacitor between corresponding insulating electrode 22a-d and first fluid 14.In In some embodiments, PID control scheme, opened loop control scheme, feedforward control scheme or any is can be used in controller 206 Other methods for being suitable for controlling liquid lens 10.

In some embodiments, liquid lens 10 can be used in the system in addition to camera arrangement 200, such as CD Disk-read device, optical fiber input equipment, for from optical fiber read output equipment, for bio-measurement optical system (for example, induction Fluorescence in biological sample), it is endoscope, optical coherent chromatographic imaging art (OCT) equipment, telescope, microscope, other kinds of Range or multiplying arrangement etc..It is saturating that many principles discussed herein and feature can be related to liquid used in various contexts Mirror 10.Liquid lens system may include liquid lens 10 and the controller 206 for controlling liquid lens.In some embodiment party In formula, it is convenient to omit various camera components, such as imaging sensor 202, autofocus system 222, aspect sensor 220 And/or other optical elements 204.

Optical image stabilization details

Camera arrangement can be used the signal from gyroscope (or other aspect sensors) and determine to be applied to liquid Body lens to position the driver signal of fluid boundary, so as to for example tilt fluid boundary compensate camera arrangement rock or Other movements of person.Signal from gyroscope may include noise, and in some embodiments, filter can be used (for example, hardware filter) reduces or mitigates the noise in gyroscope signal.The filtering may generate in gyroscope signal Postpone (for example, phase delay).The delay may interfere with camera arrangement and use liquid lens compensating movement.For example, if according to Using treated, the gyroscope signal with sizable phase delay determines the stream for tilting liquid lens to camera system The driver signal of body interface, then camera arrangement may cause fluid boundary and out of phase vibrate with vibration action.In some realities It applies in mode, which may use unfiltered gyroscope signal to determine driver signal, such as optical image stabilization. In some cases, some filtering, such as low-pass filter, high-pass filter and/or bandpass filter can be executed, these Filter can be structured as not generating sizable phase delay.In some cases, gyroscope signal is not executed any hard Part filtering.In some cases, software filtering (for example, in order to realize high pass, low pass and/or bandpass filter) can be executed. In some cases, any filtering is not executed to the analog signal from gyroscope, and number can be converted into analog signal Some filtering are executed after word signal.Even if when using high pass, low pass and/or when bandpass filter, the gyro that is passed through Instrument signal can not be filtered.Gyroscope signal with unfiltered noise can be used to determine the driving letter of liquid lens Number.Liquid lens can have the response time slower than the rate for providing gyroscope signal, and this can enable liquid lens itself Operation is executed to gyroscope signal as filter.Because fluid boundary is immediately moved to by each of gyroscope signal Position as defined in being worth, so liquid lens can effectively smooth gyroscope signal.Surprising result is that in some cases Under, less filtering is carried out to gyroscope signal or liquid lens can be enable more preferably to execute optical picture without filtering As stablizing, to more preferably compensate the vibration or other movements of camera arrangement.It is another surprising result is that, some In the case of, the input signal of speed more considerably more rapid than the response time of liquid lens is based at least partially on (for example, from gyroscope Input signal) driving liquid lens liquid lens can be made to be able to carry out effective optical image stabilization.

Fig. 6 shows exemplary camera arrangement 600.Camera arrangement 600 may include liquid lens 10.Camera arrangement 600 can also include gyroscope 601, and in the internal controller 206 with one or more filters 603.Although herein Each embodiment using gyroscope is discussed, but any other suitable orientation or movement sensing also can be used Device, such as accelerometer.Camera arrangement 600 with liquid lens 10 for example can camera, smart phone, vehicle, Utensil, IP Camera, laptop computer, monitor, TV, video game console, UAV or it is various its It is realized in his equipment.In Fig. 6, for people just in hand-held intelligent mobile phone, smart phone includes the liquid lens 10 in manpower.Manpower It may not be perfect stable.This may for example be sent out due to involuntary muscle movement and twitch, breathing, arteriopalmus blood etc. It is raw.Movement may also occur in other application occasion.For example, camera arrangement 600, which can be used, in vehicle is used as spare photograph Machine, either for carrying out vision input to self-powered electrical automobile system or AI drive system.Automobile may be mobile when driving, and And even if when wheel stationary, it is also possible to generate movement due to the vibration of engine, the movement of passenger etc..

The movement of camera arrangement 600 may damage the image generated by camera arrangement 600.For example, the movement may So that the image in video shakes, and/or static image may be made fuzzy.Gyroscope 601 is the example relative to Fig. 5 discussion Aspect sensor 220.Gyroscope (or other aspect sensors) can be used for the movement for detecting liquid lens 10.Controller 206 can receive the signal from gyroscope 601, and adjust the voltage signal for being provided to electrode, at least partly to mend Repay the movement.Accordingly, liquid lens 10 can also even stably keep expectation in the presence of motion and focus.

Gyroscope 601 can produce the original gyroscope signal of one or more of instruction movement.For example, gyroscope can produce It is raw directly proportional to angular speed or expression angular speed (such as angular speed about an axis) (or other kinds of movement) Analog voltage signal.As another example, gyroscope can produce angular velocity coding or indicate angular speed (such as about one The angular speed of a axis) (or other kinds of movement) digital signal.In some cases, analog-digital converter (for example, it Any other suitable part of a part or camera arrangement 600 for can be gyroscope can will simulate gyroscope signal (such as voltage signal) is converted to Together, digital gyroscope signal.Due to various electricity, magnetic, mechanical noise sources and/or other make an uproar Source of sound, for example, original gyroscope signal may include noise component(s), such as the noise component(s) may make the original gyroscope letter Number less accurately indicate angular speed (or other kinds of movement).The noise component(s) can be in original gyroscope signal Any component of the angular speed (or other kinds of movement) of gyroscope 601 is not indicated.The noise component(s) may include a large amount of Frequency component.The noise can be non-gaussian type.The noise may be by heat affecting, integrated influence, silicon influence of noise etc. institute Cause.

Controller 206 generates it is so structured that being based at least partially on the output signal from gyroscope 601 for controlling The control output signal of liquid lens, so as at least partly compensation campaign influence (for example, realizing liquid lens 10 And/or keep desired focusing).Controller 206 is it is so structured that the range of frequency components to the signal generated by gyroscope is made It responds out.

In some applications using gyroscope, filter can be used for filtering out noise.In certain methods, system can be with Trial filters out noise as much as possible, to be dedicated to improving performance.Some embodiments can follow following methods: have less The purer gyroscope signal of noise will improve performance.It is related at least one of certain embodiments disclosed herein to know from experience It is to be filtered original gyroscope signal (for example, being configured to make a response in controller 206 with active or passive mode Range of frequency components in) may cause the performance of reduction.Really, it may occur however that counterintuitive result: when controller 206 receives To include noise unfiltered signal when, the performance of liquid lens can be improved.It is not limited to theory, it is believed that The generation of this counterintuitive result is at least partly because some filters may cause phase delay, and the phase delay can The operation of liquid lens can be negatively affected, and executes less filtering or does not execute filtering and may cause less phase delay Perhaps not leading to phase delay, this can enable liquid lens better compensate for vibration or other movements, even if in gyro There are noises in instrument signal.In some cases, it hardware filtering or (for example switchs or puts including at least one active parts Big device) active filter may cause relatively long phase delay (for example, with digital filtering or software-based filtering phase Than).

One or more filters 603 can be used for being filtered the original gyroscope signal generated by gyroscope 601. The filter can be implemented in software, for example uses one or more microcontrollers, digital signal processor, field programmable gate Array or other digital processing units.In some embodiments, which can be used as using the passive hard of passive component Part filter.One or more filters 603 can serve as bandpass filter, so that the original gyroscope in band logical frequency range Signal passes through.Bandpass filter can stop or attenuation band leads to the original gyroscope signal outside frequency range.Accordingly, it controls Device 206 can be based on the original gyroscope letter in the band logical frequency range including the gyroscope noise component(s) in band logical frequency range Number component generate control output signal.The letter of the substantially unfiltered gyroscope in band logical frequency can be used in controller 206 Number, wherein the signal in band logical frequency can keep not for filtering (for example, in addition to low-pass filter or high-pass filter or Person generates except the residual effect of the bandpass filter of band logical frequency).One or more filters 603 can produce less than about 30 Degree, about 25 degree, about 20 degree, about 15 degree, about 10 degree, about 5 degree, about 3 degree, about 2 degree, about 1 degree perhaps about 0 degree of delay or this Any value between a little values, or any range defined by these values.In some cases, by one or more filters 603 caused delays can be less than about 10 milliseconds, be less than about 7 milliseconds, be less than about 5 milliseconds, be less than about 3 milliseconds, be less than about 2 millis Second, perhaps any value between these values or defined by the arbitrary value in these values less than 1 millisecond, less than 0.5 millisecond Any range.In some embodiments, gyroscope signal can be used in a manner of filtered phase delay is substantially absent Drive liquid lens.The filtering (such as bandpass filtering) can execute digital signal.In some cases, it can be possible to by signal Analog-digital conversion and execution numerical calculation cause small delay.In some embodiments, the top used by controller 206 Spiral shell instrument signal can have the every square root Hz of at least about 2mdps, the every square root Hz of about 3mdps, the every square root Hz of about 4mdps, about The every square root Hz of 5mdps, the every square root Hz of about 6mdps, the every square root Hz of about 7mdps, about 8mdps every square root Hz, about 9mdps Noise (the example of the every square root Hz of every square root Hz, about 10mdps, the every square root Hz of about 11mdps, the every square root Hz of about 12mdps Such as, in band logical frequency range) perhaps any value between these values or defined by the arbitrary value in these values any Range, although other values are also admissible.In this example, " mdps " is milli degree per second.The noise can be noise power Spectrum density.

Outside band logical frequency range, one or more filters 603 can be used for decaying low frequency component (for example, using high Bandpass filter) and/or decaying high fdrequency component (for example, using low-pass filter).This may interfere with controller 206 and compensates original top The low frequency component of spiral shell instrument signal and/or the trial of high fdrequency component, this can produce " drift " effect, or liquid can be caused saturating Mirror inaccurately operates.One or more filters 603 can decay lower than the low frequency component of cutoff frequency, and cutoff frequency can be with Be about 10Hz, about 7Hz, about 5Hz, about 3Hz, about 2Hz, about 1.5Hz, about 1Hz, about 0.75Hz, about 0.5Hz, about 0.25Hz or Any value between these values, or any range defined by these values, although other values are also that can be used.One or Multiple filters 603 can decay high fdrequency component (for example, using low-pass filter), such as more than the liquid in liquid lens The high fdrequency component of resonance frequency, this can improve system stability.One or more filters 603 can decay more than cutoff frequency The high fdrequency component of rate, cutoff frequency can be about 15Hz, about 20Hz, about 25Hz, about 30Hz, about 33Hz, about 35Hz, 38Hz, 40Hz, 45Hz, about the 50Hz perhaps any value between these values or any range defined by the arbitrary value in these values, Although other frequencies can also be used according to the shape of chamber etc. in kind of liquid, liquid lens size, liquid lens.Make To be another opposite with intuition as a result, can be improved through optical image stabilizing system using less filter (for example, using Liquid lens) realize inhibition ratio.Inhibit to can be than (SR) using following equation determination: SR=20*log (out/in), Wherein " out " is the number for the pixel that the image generated in the case where no OIS shakes, wherein " in " is with OIS In the case of image shake pixel number.For example, fluid boundary can be inclined in 10Hz with 0.6 degree of plus/minus of physics It is tiltedly vibrated, so that the image for generating 70 pixels in the case where no OIS shakes.With OIS, image shakes It is dynamic to be reduced to 2 pixels.It is 30.88dB for this exemplary inhibition ratio.It can be determined for various frequencies and inhibit ratio.Example Such as, above example can be repeated with multiple frequencies (for example, across working range of liquid lens or camera arrangement), such as 2Hz, 4Hz, 6Hz, 8Hz, 10Hz, 12Hz, etc..In some embodiments, following inhibition may be implemented in camera arrangement 600 Than: about -20dB, about 22dB, about -24dB, about -26dB, about -28dB, about -30dB, about -32dB, about -34dB, about -36dB, or Any value between these values of person, or any range defined by any combination of these values, although other may be implemented Inhibit ratio.Inhibition ratio listed herewith can be for a specific frequency (for example, 2Hz, 4Hz, 6Hz, 8Hz, 10Hz, 12Hz).Inhibition ratio listed herewith can be over multiple frequencies (for example, for liquid lens and/or camera arrangement Working range on) average value.

Example control system

Fig. 7 A shows the block diagram of example control system 700.Block diagram includes motion source 701, gyroscope 703, noise source 705, driver 721, electrode 722, the liquid 723 in liquid lens and controller 206 are (for example, it can have and reference The similar feature of the discussion of Fig. 5).

Control system 700 can be used for being based at least partially on the control liquid lens of the output signal from gyroscope 703, With compensation campaign.In control system 700, can with the phase delay of reduction, almost without phase delay or do not having In the case where phase delay, controller 206 is sent by gyroscope signal.The gyroscope signal for being sent to controller can wrap Unfiltered noise component(s) is included, is determined so that being based at least partially on the unfiltered noise component(s) for controlling liquid lens Voltage signal.

Motion source 701 can be any movement impacted to the other component of liquid lens and/or camera arrangement Source.Example kinematic source include: people's grip include the camera of liquid lens, wind, be equipped with thereon liquid lens object fortune It moves, across vibration of material for being coupled with liquid lens, etc..

Gyroscope 703 is it is so structured that measure as caused by motion source 701 and influence the movement of liquid lens 723. Gyroscope can be rigidly mounted to or be coupled to liquid lens 723, the shell of liquid lens 723 or install thereon There are the other structures of liquid lens 723, so that influencing the movement of liquid lens 723 (and/or other component of camera arrangement) It can be detected by gyroscope 703.

For example, gyroscope 703 it is so structured that generate indicates angular speed (such as about an axis or in one direction Angular speed) (either other kinds of movement or orientation) the original gyroscope signals of one or more.In each embodiment In, original gyroscope signal can be analog voltage signal or digital signal.In some embodiments, gyroscope can be with Several kilo hertzs of rate generates and/or updates digital signal, than such as from about 2k Hz, about 5k Hz, about 6k Hz, about 7k Hz, about 8k Hz, about 9k Hz, about 10k Hz, about 12k Hz, about 15k Hz, about 20k Hz, about 25k Hz are perhaps more rapidly or these values Between any value, or any range defined by these values, although other values can be used.In some cases, Gao Xing Energy (for example, more expensive) component can have faster speed.

One or more noise sources 705 can influence the original gyroscope signal generated by gyroscope.Original gyroscope letter Number noise component(s) may be such that original gyroscope signal is less smart when indicating angular speed (or other kinds of movement) True component.Noise source 705 may include heat, electricity, magnetic, machinery and/or other noise sources.Noise source 703 can derive from top Source inside or outside spiral shell instrument 703.

Controller 206 may include microprocessor, digital signal processor, field programmable gate array or other numbers Processor.Controller 206 can receive the original gyroscope signal generated by gyroscope 703.Controller 206 can be used original Gyroscope signal generates one or more control output signals for driver, to apply one for being applied to liquid lens A or multiple voltage signals, thus at least partly movement of compensation system experience.Controller 206 can with about with gyroscope Equally quick frequency operates quickly or at least as gyroscope.Controller 206 with a rate it is so structured that received defeated Enter in (for example, from gyroscope and/or other sources), and/or can be structured as that control output letter is updated and/or changed with a rate Number, which can be about 2k Hz, about 5k Hz, about 6k Hz, about 7k Hz, about 8k Hz, about 9k Hz, about 10k Hz, about 12k Hz, about 15k Hz, about 20k Hz, about 25k the Hz perhaps more rapidly perhaps any value between these values or by these values circle Fixed any range, although other values can be used.In some cases, high-performance (for example, more expensive) component can have There is faster speed.In some cases, buffer storage gyroscope signal or data can be used, until controller Until 206 are ready to receive the gyroscope signal or data.

High-pass filter 707 and low-pass filter 709 can be applied to original gyroscope signal.High-pass filter 707 And/or low-pass filter 709 can be implemented in software by controller 206.In each embodiment, high-pass filter 707 Or low-pass filter 709 can be applied first.Bandpass filter can be used in some cases, it, which can decay, is more than First threshold and signal lower than second threshold, and the signal between the first and second threshold values can be made to pass through.Some In embodiment, low-pass filter can be only applied, it perhaps can be only using high-pass filter or can not be to gyro Instrument signal executes any filtering.

High-pass filter 707 can have the first cutoff frequency (for example, wherein realization -3dB decays), so that more than first The frequency component of cutoff frequency passes through, and the frequency component lower than the first cutoff frequency is attenuated.Low-pass filter 709 can have There is the second cutoff frequency (for example, the wherein decaying of realization -3dB), so that the frequency component more than the second cutoff frequency passes through, and Frequency component more than the second cutoff frequency is attenuated.Second cutoff frequency can be the frequency higher than the first cutoff frequency.It is high Bandpass filter 707 and low-pass filter 709 can play the role of bandpass filter together.High-pass filter 707 and/or low pass One or more Bessel's filters, Butterworth filter, Chebyshev filter, Gauss filter can be used in filter 709 Wave device, elliptic filter, rectangular filter etc. are realized.In some embodiments, high-pass filter 707 and low-pass filtering Two distinct types of filter may be implemented in device 709.

High-pass filter 707 can receive original gyroscope signal, and decaying is lower than the frequency component of the first cutoff frequency, with And generation includes the high pass gyroscope signal more than the frequency component of the first cutoff frequency, which includes more than the first cutoff frequency The noise component(s) of rate.In some embodiments, the first cutoff frequency can be in about 1Hz, although can be as discussed herein Use various other values or range.

Low-pass filter 709 can receive high pass gyroscope signal, decay more than the frequency component of the second cutoff frequency, with And generate one or more low pass (such as being equivalent to band logical) gyroscope signals, it may include a bandpass range (such as from First cutoff frequency to the second cutoff frequency) in original gyroscope signal frequency component.In some embodiments, second Cutoff frequency can be the frequency of the slightly lower than resonance frequency of liquid lens 723.For example, if resonance frequency is about 30Hz, the cutoff frequency can be in about 25-30Hz.As another example, if resonance frequency is about 35Hz, the cutoff frequency Rate can be in about 30-35Hz.Cutoff frequency can be greater than resonance frequency.Cutoff frequency can be resonance frequency About 75%, about 80%, about 85%, about 90%, about 95%, about 100%, about 105%, about 110%, about 115%, about 120%, or The person about 125% perhaps any value between these values or any range defined by any combination of these values, although Other values also can be used in some cases.In some embodiments, low-pass filter 709 can be in high-pass filter It is operated before 707.In fig. 7, block 707 and 709 can exchange or be merged into single operation.

Controller 206 can be based at least partially on gyroscope signal (for example, low pass/band logical gyroscope signal) and determine control Signal processed.In some cases, controller 206 can be at least in a frequency range (for example, in band logical frequency) based on not The original gyroscope signal of filtering determines control signal.In some cases, controller 206 can be based at least partially on gyro Instrument data determine tilt quantity (for example, objective optics tilt quantity and/or physical slant amount) and/or inclined direction.Tilt quantity and/or Direction can be used to determine for driving the control signal of liquid lens to realize inclination, this, which can at least partly be compensated, passes through The movement that gyroscope 703 measures.Controller 206 also can be used other inputs and determine control output signal, such as target light function Rate, target focal length, goal-focus direction etc..Controller 206 can input based on one or more (to be believed for example including gyroscope Number), control signal is determined using one or more look-up tables.In some embodiments, controller 206 can be used formula, Algorithm, equation or other applicable technologies input (for example including gyroscope signal) based on one or more and determine control signal. In some embodiments, feedforward control system can be used in controller 206, for example is based on gyroscope signal.In some implementations In mode, controller can be additional or substitutes feedforward system, realizes feedback system.For example, gyroscope signal can be used to determine Target fluid interface location (for example, as feed-forward control component), and system can monitor fluid boundary position, and adjust Signal is controlled to move the fluid boundary (for example, as feedback control component) towards the target position.Controller 206 can be with One or more control output signals to be supplied to driver 721 are generated, so that driver 721 is by one or more voltages Signal is applied to the electrode 722 in liquid lens, this can influence the position of the liquid 723 in liquid lens.

In some embodiments, liquid lens, which can have, exports than controller 206 for example, updating) control signal The low speed of response of rate.It is rung for example, the liquid 723 in liquid lens can have the surface wave slower than the frequency of controller It answers.Surface wave response can indicate interface interfacial surface tension rigidity and response time.For example, the surface wave speed of response can be about 250Hz, about 275Hz, about 300Hz, about 325Hz, about 350Hz, about 380Hz, about 400Hz, about 425Hz, about 450Hz, about 475Hz, about the 500Hz perhaps any value between these values or any range defined by the arbitrary value in these values, to the greatest extent Pipe for example can also apply other frequencies according to liquid lens size, the other parameters of the fluid body and liquid lens that use. The surface wave speed of response can depend on the surface tension between fluid.It is defeated that controller 206 can update control with following frequencies Out signal (and/or gyroscope can with following frequencies update gyroscope signal): than the surface wave of the liquid 723 in liquid lens The fast frequency of the speed of response perhaps perhaps about faster 5 times or about faster 10 times of about faster 2 times of the specific surface wave speed of response, Perhaps about faster 15 times perhaps about faster 20 times perhaps about faster 25 times perhaps about faster 30 times or about faster 35 times, or About faster 40 times of person, perhaps about faster 45 times perhaps about faster 50 times perhaps about faster 60 times perhaps about faster 70 times or About faster 80 times, perhaps about faster 90 times perhaps about faster 100 times perhaps any values between these values or by these values In any range for defining of arbitrary value, although other embodiments are also admissible.

Liquid 723 in liquid lens can have a response frequency (for example, resonance frequency and/or natural frequency), than Such as from about 15Hz, about 20Hz, about 25Hz, about 30Hz, about 35Hz, about 40Hz, about 45Hz, about 50Hz, about 55Hz, about 60Hz, or Any value between these values, or any range defined by any combination of these values, although can be for example according to liquid Body lens sizes, the fluid used and other liquid lens parameters and use other values.Resonance frequency can depend on fluid it Between interface surface tension and liquid lens cavity geometry.Controller 206 can be updated with following frequencies to be controlled Output signal (and/or gyroscope can update gyroscope signal with following frequencies): the frequency faster than the response frequency of liquid lens Rate, perhaps perhaps than about faster 5 times of the response frequency about faster 10 times perhaps about faster 15 times or about faster 20 times, or About faster 25 times of person, perhaps about faster 30 times perhaps about faster 35 times perhaps about faster 40 times perhaps about faster 45 times or About faster 50 times, perhaps about faster 60 times perhaps about faster 70 times perhaps about faster 80 times or about faster 90 times, Huo Zheyue Faster 100 times, perhaps about faster 125 times perhaps about faster 150 times perhaps about faster 175 times or about faster 200 times, or About faster 250 times of person, perhaps about faster 300 times perhaps about faster 350 times perhaps about faster 400 times or about faster 450 Times, perhaps about faster 500 times perhaps about faster 550 times perhaps about faster 600 times perhaps about faster 650 times or about faster 700 times, perhaps about faster 750 times perhaps about faster 800 times perhaps about faster 850 times or about faster 900 times, Huo Zheyue It faster 950 times, perhaps perhaps any value between these values or is defined by the arbitrary value in these values for about faster 1000 times Any range, although other embodiments are also admissible.Because the liquid lens speed of response is than gyro data rate Slowly, and/or it is slower than control signal rate or driver signal rate, so liquid lens can be used as filter work, this It can effectively smooth gyroscope noise.Although each embodiment disclosed herein is about using the liquid of liquid lens saturating Mirror and camera arrangement, but the lens of variable focal length or other variable optics members of various other types also can be used Part.For example, can be based at least partially on gyroscope signal using actuator (for example, voice coil motor or other suitable set It is standby) movement solid lens, perhaps change the volume of fluid in a reservoir or change the refractive index of material, to realize optical picture As stablizing (OIS) system.Due to the speed of response slower than gyroscope and/or slower than controller, these systems can also be effectively Quick gyroscope signal is filtered.

Fig. 7 B shows the block diagram of another example control system 750.Control system 750 may include can be with system 700 The same or similar feature of the feature of (or any other system disclosed herein).Block diagram includes motion source 701, gyro Instrument 703, noise source 705, driver 721, electrode 722, the liquid 723 in liquid lens and controller 206 are (such as opposite In the description of Fig. 5).As discussed herein, various control methods can be used, for example determine using one or more look-up tables Control signal.

System 750 may include bandpass filter 751.The component of example control system 750 can be similar to previously opposite In the operation of components that the example control system 700 of Fig. 7 A describes.For example, bandpass filter 751 can be similar to relative to Fig. 7 A Example control system 700 discuss high-pass filter 707 and low-pass filter 709 combination operation.In some embodiments In, bandpass filter 751 can be with hardware or software realization.Bandpass filter 751, high-pass filter 707 and/or low pass filtered Wave device 709 can be used as passive filter or active filter is realized.Passive filter can be omitted active parts, for example open Pass and amplifier, and this can help to reduce or prevent the phase delay in filtered gyroscope signal.Bandpass filtering For device 751 it is so structured that receiving original gyroscope signal from gyroscope 703, which includes any noise point Amount.It is so structured that decaying is lower than the component of the original gyroscope signal of the first cutoff threshold, decaying is more than bandpass filter 751 The component of the original gyroscope signal of second cutoff threshold, and make the component of the original gyroscope signal in bandpass range (including noise component(s)) passes through.As discussed herein, bandpass filter 751 can not generate phase delay or only have non- Gyroscope signal is handled in the case where often small phase delay.Bandpass filter 751 can produce one or more band logical gyros Instrument signal is as output.In some embodiments, hardware reality can be used in high-pass filter 707 and/or low-pass filter 709 It is existing, similar to the discussion of bandpass filter 751.In some cases, bandpass filter 751 can digitally realize that use is soft Part is realized, realization of controller 206 etc. is used.

Controller 206 can be based at least partially on gyroscope signal and determine control signal, similar to its disclosed herein His embodiment.For example, band logical gyroscope signal can be used for one or more look-up tables, control logic, algorithm etc..It can be with Use other control signals generated by block 713.Controller 206 can produce one or more control output signals.

Fig. 7 C shows the block diagram of another example control system 775.Control system 775 can have and combine system 700 And/or the feature that feature disclosed in 750 or other embodiments disclosed herein is same or similar.In some embodiment party In formula, controller 206 can be with the quick or quick frequency at least as gyroscope 703 about as gyroscope 703 Operation.In some embodiments, original gyroscope signal can be the digital signal updated with following rate: about 2k Hz, about 5k Hz, about 7k Hz, about 8k Hz, about 10k Hz, about 15k Hz, about 20k Hz, about 25k Hz, perhaps more rapidly or these Any value between value, or any range defined by the arbitrary value in these values, although other values also can be used.Control Device 206 is it is so structured that receive input (for example, from gyroscope and/or other sources) with a rate, and/or can be structured as with one Rate updates and/or changes control output signal, which can be about 2k Hz, about 5k Hz, about 6k Hz, about 7k Hz, about 8k Hz, about 9k Hz, about 10k Hz, about 12k Hz, about 15k Hz, about 20k Hz, about 25k Hz perhaps more rapidly or these Any value between value, or any range defined by these values, although other values can be used.In some embodiments In, gyroscope signal or data can be provided to buffer 753.Buffer 753 can be used as average value accumulation buffer Operation, for determining that the average value buffer 753 of cumulative gyroscope signal or data can be then for example than gyroscope 703 The low frequency of rate, provide the average value of cumulative gyroscope signal or data to controller 206.When driver receives When the update, voltage signal can be applied to the electrode of liquid lens and apply electricity with the liquid 723 to liquid lens by driver Field force, to realize or keep expectation to focus in the presence of motion.In some embodiments, driver 721 Speed can be quickly or about equally quick (for example, within the scope of k Hz or more rapidly) as controller 206.One In a little situations, buffer 753 be can store or add up original, unfiltered gyroscope signal or data.In some feelings Under condition, (such as using passive filtering, as discussed herein) filtering can be executed (for example, high pass filter before buffer 753 Wave, low-pass filtering and/or bandpass filtering), and buffer 753 can store and/or add up and handled (such as filtering) Gyroscope signal or data.In some cases, cumulative gyroscope signal or data can be provided to (for example, making Realized with digitial controller 206) high-pass filter, low-pass filter and/or bandpass filter.In some cases, it caches Device 753 can realize digitally, such as a part of controller 206.In some embodiments, gyro data and knot The control signal and voltage that fruit obtains can be fed to the speed that they can be received controller 206, driver 721 and/ Or liquid lens 10.One or more buffers can be implemented to keep data, signal, voltage etc., quasi- until It gets ready until receiving them.For example, in some cases, buffer 753 can be sent to driver 721 to from controller 206 Signal cached.

In some embodiments, the liquid lens system for providing gyroscope signal with the phase delay of reduction includes Liquid lens comprising chamber, comprising first fluid in the chamber, comprising second fluid in the chamber, wherein first fluid And second fluid is substantially immiscible to form the fluid boundary between first fluid and second fluid, with first and second One or more insulating electrodes of fluid insulation and one or more electrodes with first fluid telecommunication, wherein the liquid is saturating Mirror be constructed so that the position of fluid boundary be based at least partially on multiple insulating electrodes and with first fluid telecommunication one The voltage applied between a or multiple electrodes.In some embodiments, which includes being configured to generate original gyroscope letter Number to indicate the gyroscope of the movement of gyroscope, and can be used to receive the original gyroscope signal, to described original Gyroscope signal is filtered to generate and there is the filtered gyroscope of phase substantially the same with original gyroscope signal to believe Number and be based at least partially on the digitial controller that the filtered gyroscope signal generates control output signal, wherein should Voltage is at least partially based on what control output signal determined.In some embodiments, the digitial controller is constructed To use bandpass filter to filter the original gyroscope signal, the bandpass filter is configured to attenuation band and leads to frequency range Except signal, and pass through the frequency in band logical frequency range.Extraly or alternatively, the original gyroscope letter Number include noise, the filtered gyroscope signal includes the noise component(s) in band logical frequency range.Extraly or replace Dai Di, the digitial controller are configured to passive low ventilating filter and second filter using at least first filter type The passive high three-way filter of type filters original gyroscope signal, and the second filter type is different from first filtering Device type.Extraly or alternatively, the digitial controller is configured to using at least one passive low ventilating filter and nothing Source high-pass filter filters the original gyroscope signal, at least one described passive low ventilating filter is configured to decaying and is more than The frequency of first cutoff frequency, and pass through the frequency lower than the first cutoff frequency, wherein the resonance frequency of the liquid lens Rate is higher than first cutoff frequency, and the passive high three-way filter is configured to the frequency that decaying is lower than the second cutoff frequency, Described in the second cutoff frequency be lower than first cutoff frequency.Extraly or alternatively, the digitial controller is configured to The control output signal is generated using feedforward control system.Extraly or alternatively, the gyroscope is configured to first Frequency updates the original gyroscope signal and the digitial controller and is configured to receive original gyroscope signal and with the Two frequencies generate the control output signal, and the second frequency is faster than the surface wave response frequency of the liquid lens.Additionally Ground or alternatively, the first frequency is at least about 5kHz, and the second frequency is at least as the first frequency Fastly.

In some embodiments, a kind of control system for liquid lens system includes gyroscope, is configured to generate Original gyroscope signal including noise.A kind of digitial controller can be used to receive described original including noise Gyroscope signal is filtered to generate the filtered gyroscope for including at least some noises the original gyroscope signal Signal, and be based at least partially on the filtered gyroscope signal including at least some noises and generate control output letter Number.Driver can be structured as receiving the control output signal, and voltage signal is applied to one in liquid lens Or multiple electrodes.In some embodiments, the liquid lens includes chamber, comprising first fluid and packet in the chamber Containing second fluid in the chamber, wherein the first fluid and the second fluid are substantially immiscible described in formation Fluid boundary between first fluid and the second fluid, wherein the liquid lens is configured such that the fluid boundary Position be based at least partially on the voltage signal for being applied to the liquid lens.

In some embodiments, a kind of control method for compensating the movement in liquid lens includes producing from gyroscope Raw original gyroscope signal, the original gyroscope signal includes the noise for not indicating the movement of the gyroscope, by the original Beginning gyroscope signal is sent to digitial controller from the gyroscope, to the original gyroscope signal filtering to generate including extremely The filtered gyroscope signal of few some noises, wherein the filtered gyroscope signal has and the original gyroscope The substantially the same phase of signal, and be based at least partially on the filtered gyroscope signal and generate control output letter Number, and it is based at least partially on one or more electricity of the control output signal by voltage signal driving into liquid lens Pole.In some embodiments, the liquid lens includes chamber, comprising first fluid in the chamber and included in chamber In second fluid, wherein the first fluid and the second fluid are substantially immiscible to form the first fluid Fluid boundary between the second fluid.In some embodiments, the control method includes in response to being applied to It states the voltage signal of one or more electrodes and changes or keep the position of the fluid boundary.

Additional detail

In the disclosure being provided above, in conjunction with specific illustrative embodiments describe device for controlling lens, System and method.It is to be understood, however, that the principle and advantage of the embodiment can be used for any other applicable system, Device or method.Although some disclosed embodiments may be to describe with reference to simulation, number or hybrid circuit, In various embodiments, it is different that principles discussed herein and advantage, which can be used as simulation, number or hybrid circuit, It realizes part.In some of the figures, four electrodes (for example, insulating electrode) are shown.Principles discussed herein and advantage can be answered For having more than four electrodes or less than the embodiment of four electrodes.

Principles described herein and advantage can be realized in various devices.The example of such device not may include still not It is confined to domestic electronic appliances, some consumers' electronic product, electronic test equipment etc..Principles described herein and advantage relate to And lens.Example product with lens may include mobile phone (for example, smart phone), health care supervision equipment, such as vapour The vehicle electronics system of vehicle electronic apparatus system etc, web camera, television set, computer monitor, computer, hand Hold formula computer, tablet computer, laptop computer, personal digital assistant (PDA), refrigerator, DVD player, CD Player, Digital VTR (DVR), camcorder apparatus, camera, digital camera, duplicator, facsimile machine, scanner, multifunction peripheral Equipment, wrist-watch, clock etc..Furthermore, device may include semi-finished product.

In some embodiments, methods described herein, technology, microprocessor and/or controller be by one or What multiple dedicated computing equipments were realized.The dedicated computing equipment can be hardwired to execute the technology, or can wrap Include constantly being compiled for such as one or more specific integrated circuits (ASIC) or field programmable gate array (FPGA) etc Journey is to execute the digital electronic device of the technology, or may include being programmed to according to firmware, memory, other storages Program instruction in medium or combination executes one or more common hardware processors of the technology.Described instruction can stay Stay in RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, removable In the non-transitory computer-readable storage media of Moving plate, CD or any other form.Such dedicated computing equipment is also Customization programming can be combined for realizing hardwire logic, ASIC or the FPGA of the customization of the technology.The dedicated meter Calculate that equipment can be desk side computer system, server computer system, portable computer system, handheld device, networking are set It is standby or combined including hard wire and/or programmed logic with any other equipment or equipment for realizing the technology.

Processor and/or controller described herein can be coordinated by operating system software, such as iOS, Android, Chrome OS、Windows XP、Windows Vista、Windows 7、Windows 8、Windows Server、Windows CE, Unix, Linux, Sun OS, Solaris, iOS, Blackberry OS, Vx Works or other compatible operation systems System.In other embodiments, the calculating equipment can be controlled by proprietary operating systems.Traditional operation for execution The computer disposal of system control and plan especially carries out memory management, provides file system, networking, I/O service, and User interface functionality, such as graphic user interface (" GUI ") are provided.

Processor and/or controller described herein, which can be used, enables microprocessor and/or controller become special purpose machinery The hardwire logic of customization, one or more ASIC or FPGA, firmware and/or programmed logic realize the technology.According to A kind of embodiment, portion of techniques disclosed herein are by processor (such as microprocessor) and/or other controller components In response to including that one or more sequential instructions in memory execute.Such instruction can be from other storage mediums (ratio Such as store equipment) it reads in memory.It executes and enables processor or controller execute comprising instruction sequence in memory Processing step described herein.In alternative embodiments, can be used hard-wired circuitry instead of software instruction or with it is soft Part instruction combines.

The various illustrative logical blocks and module described in conjunction with embodiments disclosed herein can be by being designed to The machine for executing functions described herein is realized or is executed, for example processor device, digital signal processor (DSP) are dedicated Integrated circuit (ASIC), field programmable gate array (FPGA) perhaps other programmable logic device discrete door or crystal Pipe logic, discrete hardware component, or any combination thereof.Processor device can be microprocessor, but in alternative solution, Processor device can be controller, microcontroller or state machine, their combination, etc..Processor device may include It is configured to the circuit of processing computer executable instructions.In another embodiment, processor device includes executing logical operation FPGA or other programming devices, without handle computer executable instructions.Processor device can also be used as calculating The combination of equipment is realized, such as the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessors combination DSP Core or any other such construct.Although be described mainly with respect to digital technology herein, processor device can also Mainly to include analog component.For example, some or all implementation technologies described herein can be in analog circuit or simulation It is realized with digital hybrid circuit.

Unless context understands requirement, and otherwise in entire explanation and claims, word "include", "comprise" etc. Be with inclusiveness meaning interpretation, and it is opposite with the meaning of exclusiveness or exhaustive；That is, being with " including, but are not limited to " Meaning interpretation.Usually used word " coupling " or " connection " herein is related to being directly connected to or can be by one Two or more elements of a or multiple intermediary element connections.Extraly, word " wherein ", " more than ", " following " and similar contain The word of justice shall mean that entire the application when using in this application, any specific part without referring to the application. When context allows, the word using singular or plural in detailed description can also respectively include plural number or odd number.It closes Word "or" in the list of two or more, which is intended that, covers all explained below of the word: in the list Arbitrary Term in the item, any combination of all items in the list and the item in the list.This Whole numerical value that place provides are intended that including similar value (for example, in the range of measurement error).

Although the disclosure includes certain embodiments and example, the skilled addressee will appreciate that being the range Other alternate embodiments and/or purposes can be extended to more than the specifically disclosed embodiment and it is obvious Variation example and equivalent.In addition, although being shown specifically and having described several modifications of embodiment, in this field Those of ordinary skill, which is based on the disclosure, will be easy to know other variation examples.It is also envisaged that the spy of embodiment can be made Determine the various combination or sub-portfolio of feature and aspect, and still falls within the scope of the present disclosure.It is to be understood that disclosed The various features and aspect of embodiment can be combined with each other or substitute, to form the change type of embodiment.Herein Disclosed any method without executing in the described sequence.Therefore, it is intended that the range should not be by described above Particular implementation limitation.

It only particularly points out or understands in the context used and obtain, otherwise conditional language, such as is therein " can ", " can with ", " possibility ", "available", be generally intended to that expression certain embodiments include and other embodiments do not include certain A little features, element and/or step.Therefore, such conditional language be usually not intended to figure imply feature, element and/or step with Any mode required for one or more embodiments, either one or more embodiments centainly include for having or Do not have user input or prompt in the case where judge to include in any specific embodiment or execute these features, member The logic of part and/or step.Any title used herein is only used for helping reader, rather than means to limit range.

In addition, although devices described herein, system and method may be allowed various variation examples and substitute mode, It is shown in the accompanying drawings and its specific example is described in detail here.It should be understood, however, that the present invention is not limitation In disclosed particular form or method, but on the contrary, the present invention should cover the spirit for belonging to the various embodiments of description With all variation examples, equivalent and the alternative solution of range.In addition, appointing here in connection with disclosed in embodiment or embodiment What specific feature, aspect, method, property, characteristic, quality, attribute, element etc. can be used for illustrating herein every other Embodiment or embodiment.Any method disclosed herein without executing in the described sequence.Side disclosed herein Method may include the certain behaviors made by practitioner；However, this method also may include clearly or implicitly making Any third party instruction of these movements.

Ranges disclosed herein also includes any and all overlapping of subrange and combinations thereof.Such as " up to ", " extremely It is few ", " being greater than ", " being less than ", " between " etc. language include described numerical value.Before be equipped with such as " about " or " about " etc The numerical value of term include described numerical value, and should be based on environment interpretation (for example, reported as precisely as possible in this case And reasonably explain, such as ± 1%, ± 3%, ± 5%, ± 10%, ± 15% etc.).For example, " about 3.5mm " includes "3.5mm".The narration of numerical value and/or value herein should be understood as disclosing the value or numerical value and " about " or " big About " though these values perhaps both numerical value in the case where no narration " about " or " about ".For example, narration " 3.5mm " packet Include " about 3.5mm ".Before to be equipped with the phrase of term such as " substantially " etc include described phrase, and ring should be based on Border is explained and (is reasonably explained as far as possible in this case).For example, " substantial constant " includes " constant ".Unless otherwise saying Bright, otherwise all measurements are measured under the standard conditions including atmospheric temperature and pressure.