阅读说明：本技术 一种发光装置及其发光驱动的预补偿方法 (A kind of light emitting device and its precompensation method for the driving that shines ) 是由 李丹 潘扬 严冬勤 郭淦 于 2019-07-30 设计创作，主要内容包括：本申请公开一种发光装置及其发光驱动的预补偿方法。该装置包含发光驱动输入模块、驱动运放模块、发光模块、比较判断模块、预补偿模块,发光驱动输入模块的输出端电性连接预补偿模块的输入端及比较判断模块的第一端,预补偿模块的输出端电性连接发光驱动模块的输入端,预补偿模块的触发端电性连接比较判断模块的第三端,驱动模块的输出端电性连接发光模块及比较判断模块的第二端,比较判断模块基于其第一端采样的发光驱动输入模块的输入信息及第二端采样的驱动运放模块的输出信息估算出预补偿信息并通过其第三端传输至预补偿模块。这样通过比较判断模块估算出补偿参数,可确保不同温度,不同寄生条件下输出光源的一致性,提高测距精度。(The application discloses the precompensation method of a kind of light emitting device and its driving that shines.The device includes the driving input module that shines, drive amplifier module, light emitting module, multilevel iudge module, pre-compensate for module, it shines and the output end of input module is driven to be electrically connected the input terminal of precompensation module and the first end of multilevel iudge module, the output end for pre-compensating for module is electrically connected the input terminal for the drive module that shines, the triggering end for pre-compensating for module is electrically connected the third end of multilevel iudge module, the output end of drive module is electrically connected the second end of light emitting module and multilevel iudge module, the output information of the driving amplifier module of input information and the second end sampling for the luminous driving input module that multilevel iudge module is sampled based on its first end estimates pre-patch information and is transmitted to precompensation module by its third end.Compensating parameter is estimated by comparing judgment module in this way, it can be ensured that different temperatures, the consistency of output light source under different parasitic conditions improve range accuracy.)

1. a kind of light emitting device is, characterized by comprising: the driving input module that shines, driving amplifier module, light emitting module, ratio Compared with judgment module, module is pre-compensated for,

The output end of the luminous driving input module be electrically connected precompensation module input terminal and multilevel iudge module the One end,

The output end of the precompensation module is electrically connected the input terminal for the drive module that shines,

The triggering end of the precompensation module is electrically connected the third end of multilevel iudge module, the output of the driving amplifier module End is electrically connected the second end of light emitting module and multilevel iudge module,

The multilevel iudge module estimates pre- benefit based on the output information of input information and second end sampling that first end samples It repays information and transmits it to the precompensation module, the precompensation module receives and responds the pre-patch information.

2. light emitting device as described in claim 1, which is characterized in that the pre-patch information includes delay time.

3. light emitting device as claimed in claim 2, which is characterized in that the multilevel iudge module is to compare and judge whether Reach expected delay time.

4. light emitting device as described in claim 1, which is characterized in that the precompensation module includes delayer.

5. light emitting device as described in claim 1, which is characterized in that the multilevel iudge module receives the hair of first end sampling The phase information of the input electrical signal of optical drive input module.

6. light emitting device as described in claim 1, which is characterized in that the multilevel iudge module receives the drive of second end sampling The phase information of the output electric signal of dynamic amplifier module.

7. a kind of precompensation method of the luminous driving of light emitting device, which is characterized in that comprising such as any one of claim 1-6 The light emitting device, the method comprises the following steps:

S1. detection, which shines, drives the input signal of input module；

S2. the output signal of detection driving amplifier module；

S3. multilevel iudge module generates thermal compensation signal and is transmitted to precompensation module；

The precompensation module receives and responds the thermal compensation signal and will export after received input signal delay predetermined time.

8. the method for claim 7, which is characterized in that the luminous drive that the multilevel iudge module is sampled based on first end The phase information of the input electrical signal of dynamic input module.

9. the method for claim 7, which is characterized in that the driving fortune that the multilevel iudge module is sampled based on second end The phase information of the output electric signal of amplification module.

10. the method for claim 7, which is characterized in that the precompensation module receives and responds the thermal compensation signal Adjust the rising edge of input signal and/or the delay time of failing edge.

Technical field

The present invention relates to a kind of ranging light emitting devices, are specifically related to the precompensation of a kind of light emitting device and its driving that shines Method.

Background technique

In recent years with the development of communication technology, intelligent control using more more and more universal, in this way for short-distance and medium-distance Precision distance measurement demand it is increasing.Such as recognition of face, 3D modeling, safety monitoring, even unmanned aerial vehicle or automobile Automatic Pilot etc. requires to use the range measurement of high-speed, high precision.The distance measuring method of mainstream is as shown in Figure 1, it passes through at present It actively shines and gets on measured object (barrier) and receive the light beam being reflected back, by the certain of transmitting light and reflected light Characteristic is compared, such as the time difference, the information such as phase difference, to calculate the range information from measured object.In this way by holding The continuous accurate detection range information of high speed, realizes the identification to detection target, tracking, speed monitoring even motion track anticipation etc. The operation of manual intelligent.But with increasingly wider, the accuracy and speed and ranging model to ranging of ranging application range The requirement enclosed becomes higher and higher.The output power of light emitting device in this way becomes higher and higher, and the output frequency of support is also more next It is faster thus also higher and higher to coherence request luminous every time.Due to light emitting device output frequency/power when practical application Raising, light emitting device output signal becomes more and more sensitive to system parasitic and environment temperature, and light emitting device itself Temperature rise phenomenon can also be more and more obvious.And the self-consistent property that these influences can all cause light emitting device luminous is deteriorated, thus Reduce range accuracy.

Existing light emitting device uses temperature detecting module for most of the influence for solving temperature factor, passes through and detects mould Block detects the current temperature information of device and using preset temperature compensation algorithm come the influence of compensation temperature.In this way by temperature Degree detection module and temperature compensation algorithm not only increase a large amount of hardware spending, also in product export timing, occupy big The time of measurement correction, become a factor reused very much for influencing light emitting device cost and yield.

Summary of the invention

In view of this, the present invention proposes the precompensation method of a kind of light emitting device and its driving that shines.It can by this method To prejudge the distortion of the luminous signal as caused by non-ideal factor, and the compensated in advance distortion automatically, it is ensured that in different temperatures difference The consistency of output light source under parasitic conditions.

To achieve the above object, the present invention uses following scheme,

A kind of light emitting device, characterized by comprising: shine driving input module, driving amplifier module, light emitting module, Multilevel iudge module, precompensation module,

The output end of the luminous driving input module is electrically connected the input terminal and multilevel iudge module of precompensation module First end,

The output end of the precompensation module is electrically connected the input terminal for the drive module that shines,

The triggering end of the precompensation module is electrically connected the third end of multilevel iudge module, the driving amplifier module Output end is electrically connected the second end of light emitting module and multilevel iudge module,

The multilevel iudge module is estimated based on the output information of input information and second end sampling that first end samples Pre-patch information simultaneously transmits it to the precompensation module, and the precompensation module receives and responds the pre-patch information.

Preferably, which includes delay time.

Preferably, which compares and judges whether to reach preset delay time.

Preferably, which includes delayer.

Preferably, which receives the phase of the input electrical signal of the luminous driving input module of first end sampling Position information.

Preferably, which receives the phase letter of the output electric signal of the driving amplifier module of second end sampling Breath.

The embodiment of the present application also provides a kind of precompensation method of the luminous driving of light emitting device, which is characterized in that includes Above-mentioned light emitting device, the method comprises the following steps:

S1. detection, which shines, drives the input signal of input module；

S2. the output signal of detection driving amplifier module；

S3. multilevel iudge module generates thermal compensation signal and is transmitted to precompensation module；

The precompensation module receives and responds the thermal compensation signal will be defeated after received input signal delay predetermined time Out.

Preferably, the phase of the input electrical signal for the luminous driving input module which is sampled based on first end Position information.

Preferably, the phase letter of the output electric signal for the driving amplifier module which is sampled based on second end Breath.

Preferably, the precompensation module receive and respond thermal compensation signal adjustment input signal rising edge and/or under The delay time on edge drops.

Beneficial effect

Compared with the existing technology, the application embodiment has the advantages that

1) distortion of the luminous signal as caused by non-ideal factor can be prejudged by this method automatically, and this is abnormal for compensated in advance Become, it is ensured that the consistency of output light source under different temperatures difference parasitic conditions.

2) this method can save the detection module and temperature compensation algorithm of temperature.

3) light emitting device reduces the design difficulty of printed circuit board (PCB).

4) the appearance correction time that the light emitting device reduces product reduces hard-wired difficulty.

According to below with reference to the accompanying drawings becoming to detailed description of illustrative embodiments, other feature of the invention and aspect It is clear.

Detailed description of the invention

Comprising in the description and constitute the attached drawing of part of specification and specification together illustrate it is of the invention Exemplary embodiment, feature and aspect, and principle for explaining the present invention.

Fig. 1 is that the ranging scheme of existing light emitting device shows journey figure,

Fig. 2 is the functional schematic of the real-time compensation of the light emitting device drive signal of one embodiment of the invention,

The input-output wave shape without precompensation of Fig. 3 a one embodiment of the invention,

The input-output wave shape for having precompensation of Fig. 3 b one embodiment of the invention,

Fig. 4 is the precompensation method step signal of the luminous driving of the light emitting device of one embodiment of the invention.

Specific embodiment

Below with reference to attached drawing various exemplary embodiments, feature and the aspect that the present invention will be described in detail.It is identical in attached drawing Appended drawing reference indicate element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, remove It non-specifically points out, it is not necessary to attached drawing drawn to scale.

The application embodiment proposes a kind of light emitting device, and the driving input that shines is delayed one by pre-compensating for module in advance The fixed time, then amplify driving capability again, by amplified information input to luminescence unit is driven, driving luminescence unit is connect It receives and responds the signal and worked (as shone).One delay time of light emitting device initial preset, multilevel iudge when device works The electric signal of driving input electrical signal and driving output of the module based on detection estimates delay time (input/output electric signal Sampling sampled based on the preset sampling period, the compensation delay time estimated is dynamic change when this sampling device works).In In one embodiment, pre-compensating for delay time of the module to input signal in out of phase can be specifically delayed with independent control It is how many then to depend on the comparison result for driving and exporting and shining driving input that shines.

Next, describing the application embodiment in conjunction with Fig. 2 proposes a kind of light emitting device.The light emitting device includes to shine Input module, driving amplifier module, light emitting module, multilevel iudge module, precompensation module are driven, shine driving input module The input terminal of output electric property connection precompensation module and the first end of multilevel iudge module, the output end for pre-compensating for module electrically connect The input terminal of sending and receiving optical drive module, the triggering end for pre-compensating for module are electrically connected the third end of multilevel iudge module, drive mould The output end of block is electrically connected the second end of light emitting module and multilevel iudge module,

Wherein, the input information and second end for the luminous driving input module that multilevel iudge module is sampled based on its first end The output information of the driving amplifier module of sampling estimates pre-patch information and is transmitted to precompensation module by its third end.This The design of sample, the driving input information that relatively shines by comparing judgment module and the driving output information that shines detect distortion letter Breath needs additional compensating parameter (e.g., delay time) to estimate, and which ensures that in different temperatures, different parasitism items The consistency of output light source under part effectively improves range accuracy in this way.The embodiment is not necessarily to additional temperature detecting module And temperature compensation algorithm, the cost of light emitting device is effectively reduced, reduces the control complexity of device.Reduce printed circuit board (PCB) design difficulty, and reduce the correction time of the factory of product.

Output driving after directly the driving capability of input signal is amplified this embodiment avoids conventional light emitting device Luminescence unit.Without compensation, the driver for being originally used for amplification driving capability can introduce distorted signals and letter Number delay.And it is this kind of distortion and delay can with temperature or other non-ideal factors real-time change.It cannot keep each hair The consistency of photoperiod.

In one embodiment, the input for the luminous driving input module that multilevel iudge module is sampled based on its first end is believed Breath and the output information of driving amplifier module of second end sampling detect distortion information, thus estimate additional compensation when Between.

In one embodiment, precompensation module is made of multiple cascaded delay elements.The delay time provided is provided It is determined by the initial setting up powered on.The input voltage for the luminous driving input module that multilevel iudge module is sampled based on its first end The output voltage information of information and the driving amplifier module of second end sampling, is judged by phase difference between the two by pre- Whether compensated output signal delay meets expection.If it find that phase difference is too small, illustrate that delay time is inadequate, needs to increase The original delay setting of module is pre-compensated for, achievees the purpose that increase delay.If it find that phase difference is excessive, illustrate delay time mistake Greatly, then reduce the original delay setting of precompensation module, achieve the purpose that reduce delay.Other than detecting voltage phase difference, In In one embodiment, some applications more sensitive to output electric current can increase current/voltage-converted electricity in multilevel iudge module Road comes out the phase difference detection of the driving current of the two, mends by the way that method similar to the above (being based on phase difference) adjustment is pre- The setting repaid achievees the purpose that be precisely controlled delay.

It as shown in Figure 3a, is the waveform diagram detected when not run using the device of the application embodiment, device fortune The driving output that it drives luminescence unit when row, is influenced, output signal can be distorted by non-ideal factors such as temperature changes.With For common impulse type luminous signal, in the case where the frequency and constant pulsewidth of driving input, as shown in Figure 3a, t1~t8 It is unequal, therefore cause the frequency of different input and output and pulsewidth also different, there are errors, shine so as to cause luminescence unit The variation of time.In this way its in ranging application, this influence of the variation to precision is very big.As shown in Figure 3b, for using this The waveform diagram detected when the device operation of application embodiment, by the comparison of input and output, this delay variation can quilt It detected, and this delayed data is detected to by comparing judgment module and is transferred to precompensation module, pre-compensate for mould Block responds the compensated information and (e.g., provides delay t_p1~t_p8With output delay t1~t8 and become so that input signal to export Total delay T_total=ti+t_piRemain constant).In one embodiment, precompensation module (also referred to as pre-compensation unit) passes through The delay time of adjustment signal rising edge and failing edge can compensate this kind of distortion automatically in this way, guarantee the consistency of fluorescent lifetime.

Next a kind of precompensation of the luminous driving of light emitting device of the application embodiment proposition is described in conjunction with Fig. 4 Method (also referred to as anti-interference precompensation method), it includes above-mentioned light emitting device, this method is comprised the following steps:

S1. detection, which shines, drives the input signal of input module；

S2. the output signal of detection driving amplifier module；

S3. multilevel iudge module generates thermal compensation signal and is transmitted to precompensation module；

Wherein receive and respond the thermal compensation signal will be defeated after received input signal delay predetermined time for precompensation module Out.This method drives input signal (e.g., the input voltage waveform, or input driving current/electricity of input module by comparing shining Press converted-wave) and driving amplifier module output signal (e.g., output voltage waveforms or output driving current/voltage converted wave Shape) detect distortion information, it prejudges out and needs additional compensating parameter (e.g., delay time), carry out thermal compensation signal distortion.In this way should Method ensures that in different temperatures, the consistency of output light source under different parasitic conditions effectively improves range accuracy in this way.

In an implementation method, precompensation module receives and respond thermal compensation signal adjust input signal rising edge and/or The delay time of failing edge, to realize delay.

In above embodiment, the phase information of input electrical signal can be the phase information or input current of input voltage Phase information.The phase information of electric signal is exported, can be the phase information of output voltage or the phase information of input current

The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art It cans understand the content of the present invention and implement it accordingly, it is not intended to limit the scope of the present invention.It is all to lead according to the present invention The modification for wanting the Spirit Essence of technical solution to be done, should be covered by the protection scope of the present invention.