阅读说明：本技术 光学组件及投影设备 (Optical assembly and projection equipment ) 是由 欧阳剑 张聪 胡震宇 于 2021-03-15 设计创作，主要内容包括：本公开提出了一种光学组件及投影设备；该光学组件包括弹性构件、设置于该弹性构件上的光学镜片、以及驱动该弹性构件和该光学镜片偏转的驱动组件,该驱动组件包括壳体以及设置于该壳体内的驱动构件,该驱动构件与该弹性构件弹性连接。本公开通过在该壳体内设置驱动构件,由于该驱动构件与该弹性构件弹性连接,因此驱动构件的力直接传递至弹性构件,使得该弹性构件依附于驱动构件的形变进行偏转,而光学镜片与弹性构件固定设置,因此驱动构件的形变直接实现了光学镜片的偏转,提高了光学组件的响应速度。(The present disclosure proposes an optical assembly and a projection apparatus; the optical assembly comprises an elastic member, an optical lens arranged on the elastic member and a driving assembly for driving the elastic member and the optical lens to deflect, the driving assembly comprises a shell and a driving member arranged in the shell, and the driving member is elastically connected with the elastic member. According to the optical assembly, the driving member is arranged in the shell, and the driving member is elastically connected with the elastic member, so that the force of the driving member is directly transmitted to the elastic member, the elastic member deflects along with the deformation of the driving member, and the optical lens and the elastic member are fixedly arranged, so that the deflection of the optical lens is directly realized by the deformation of the driving member, and the response speed of the optical assembly is improved.)

1. An optical assembly, comprising an elastic member, an optical lens disposed on the elastic member, and a driving assembly for driving the elastic member and the optical lens to deflect, wherein the elastic member is fixedly disposed with the optical lens; wherein the content of the first and second substances,

the driving component comprises a shell and a driving component arranged in the shell, the driving component is elastically connected with the elastic component, the driving component can deform, so that the elastic component can depend on the deformation of the driving component to drive the optical lens to deflect by taking a first direction or/and a second direction as an axis, and the included angle range of the first direction and the second direction is 0-90 degrees;

the elastic component comprises an elastic supporting part and an elastic fixing part, and the elastic fixing part comprises two first elastic fixing plates arranged along the first direction and two second elastic fixing plates arranged along the second direction;

the first elastic fixing plate and the second elastic fixing plate extend from the elastic supporting part to the inside of the shell, the first elastic fixing plate and the second elastic fixing plate are vertically connected with the elastic supporting part, two adjacent first elastic fixing plates and two adjacent second elastic fixing plates are vertically arranged, and two first elastic fixing plates and two adjacent second elastic fixing plates form an accommodating cavity in an enclosing mode;

the optical lens is embedded in the accommodating cavity, and the optical lens is fixedly connected with the first elastic fixing plate and the second elastic fixing plate.

2. An optical assembly according to claim 1, wherein the driving members comprise at least a first driving member disposed along the first direction and at least a second driving member disposed along the second direction, the first driving member being resiliently coupled to the resilient member, the second driving member being resiliently coupled to the resilient member;

the elastic member deflects based on the deformation of the first driving member in the third direction by taking the second direction as an axis, deflects based on the deformation of the second driving member in the third direction by taking the first direction as an axis, and is perpendicular to a plane where the first direction and the second direction are located.

3. The optical assembly of claim 2, wherein the resilient member further comprises a first baffle plate positioned within the receiving cavity, the first baffle plate being perpendicularly connected to the first resilient mounting plate and the second resilient mounting plate, the first baffle plate being disposed parallel to the optical lens;

the optical lens comprises a first surface far away from the elastic supporting part, and the distance between the first baffle plate and the first surface of the optical lens in the third direction is larger than a first threshold value.

4. The optical assembly of claim 2, wherein the driving members respectively include a first end portion proximal to the resilient support and a second end portion distal from the resilient support;

the driving assembly further comprises a flexible circuit board which is used for providing current for the driving member to enable the driving member to deform, the first end of the driving member is fixedly connected with the first elastic fixing plate through a first connecting device, and the second end of the driving member is electrically connected with the flexible circuit board through a second connecting device.

5. The optical assembly of claim 4, wherein the flexible circuit board comprises a backplane and a plurality of drive connection boards disposed perpendicular to the backplane;

the first side of the driving connecting plate is fixedly and electrically connected with the driving member through the first connecting device, the second side of the driving connecting plate is fixedly connected with the elastic fixing part, and the driving member is fixedly and electrically connected with the bottom plate of the flexible circuit board through the second connecting device.

6. The optical assembly of claim 5, wherein the tension in any region of the drive connection plate is less than the tension in any region of the base plate.

7. An optical assembly according to claim 5, wherein the first end of the driving member is spaced from the resilient support in a third direction by more than a second threshold, and the second end of the driving member extends towards the housing and is fixedly connected thereto.

8. An optical assembly according to claim 5, wherein the resilient support comprises a primary tensile member proximal to the drive member and a secondary tensile member distal to the drive member;

wherein the primary tensile member has a coefficient of elasticity less than a coefficient of elasticity of the secondary tensile member.

9. The optical assembly according to any one of claims 1 to 8, further comprising permanent magnets disposed on at least one side surface of the optical lens, and magnetic field sensors disposed in the housing, wherein the permanent magnets and the magnetic field sensors are in one-to-one correspondence.

10. An optical assembly according to any one of claims 1 to 8, wherein the drive member comprises a piezoelectric member.

11. A projection device, characterized in that the projection device comprises an optical assembly according to any one of claims 1 to 10.

Technical Field

The present disclosure relates to the field of projection technologies, and in particular, to an optical assembly and a projection apparatus.

Background

The current laser projection equipment expands a low-resolution picture to a high-resolution picture through a galvanometer so as to improve the picture quality of a projection picture.

In the current optical assembly, the optical lens is driven to move by the cooperation of the voice coil motor and the metal reed, so as to generate small-amplitude vibration. For example, when the optical lens in the optical assembly is a galvanometer, the magnet on the galvanometer is subjected to the reaction force of the lorentz force of the coil to push the lens body of the galvanometer, and the coil and the magnet are in spaced force transmission, and lack of connection of intermediate entities, the electromagnetic force conducted in the spaced space needs a certain time to dissipate the redundant vibration of the reed so as to reach the stable displacement position. Therefore, the current voice coil motor and the metal reed have slow structural response speed, and the optical lens cannot enter a stable displacement position quickly due to multi-step high-frequency vibration, so that the accurate control of the transmission position of the lens cannot be realized.

Therefore, an optical assembly and a projection apparatus are needed to solve the above technical problems.

Disclosure of Invention

The present disclosure provides an optical assembly and a projection apparatus to improve the technical problem of slow response speed of the existing optical assembly.

In order to solve the above problems, the technical solution provided by the present disclosure is as follows:

the present disclosure provides an optical assembly, which includes an elastic member, an optical lens disposed on the elastic member, and a driving assembly for driving the elastic member and the optical lens to deflect, wherein the elastic member is fixedly disposed with the optical lens; wherein the content of the first and second substances,

the drive assembly includes the casing and sets up in drive component in the casing, drive component with elastic component elastic connection, drive component can produce deformation, so that elastic component can depend on drive component's deformation and drive optical lens uses first direction or/and second direction as the axle deflection, first direction with the contained angle scope of second direction is 0 to 90.

Optionally, the driving member comprises at least one first driving member disposed along the first direction and at least one second driving member disposed along the second direction, the first driving member is elastically connected with the elastic member, and the second driving member is elastically connected with the elastic member;

the elastic member deflects based on the deformation of the first driving member in the third direction by taking the second direction as an axis, deflects based on the deformation of the second driving member in the third direction by taking the first direction as an axis, and is perpendicular to a plane where the first direction and the second direction are located.

Optionally, the elastic member includes an elastic supporting portion and an elastic fixing portion, the elastic fixing portion includes two first elastic fixing plates disposed along the first direction and two second elastic fixing plates disposed along the second direction;

the first elastic fixing plate and the second elastic fixing plate extend from the elastic supporting part to the inside of the shell, the first elastic fixing plate and the second elastic fixing plate are vertically connected with the elastic supporting part, two adjacent first elastic fixing plates and two adjacent second elastic fixing plates are vertically arranged, and two first elastic fixing plates and two adjacent second elastic fixing plates form an accommodating cavity in an enclosing mode;

the optical lens is embedded in the accommodating cavity, and the optical lens is fixedly connected with the first elastic fixing plate and the second elastic fixing plate.

Optionally, the elastic member further includes a first baffle plate located in the accommodating cavity, the first baffle plate is vertically connected to the first elastic fixing plate and the second elastic fixing plate, and the first baffle plate is parallel to the optical lens;

the optical lens comprises a first surface far away from the elastic supporting part, and the distance between the first baffle plate and the first surface of the optical lens in the third direction is larger than a first threshold value.

Optionally, the drive member comprises a first end proximal to the resilient support and a second end distal to the resilient support;

the driving assembly comprises a flexible circuit board which is used for providing current for the driving component to enable the driving component to deform, the first end of the driving component is fixedly connected with the first elastic fixing plate through a first connecting device, and the second end of the driving component is electrically connected with the flexible circuit board through a second connecting device.

Optionally, the flexible circuit board includes a bottom plate and a plurality of driving connection plates disposed perpendicular to the bottom plate;

the first side of the driving connecting plate is fixedly and electrically connected with the driving member through the first connecting device, the second side of the driving connecting plate is fixedly connected with the elastic fixing part, and the driving member is fixedly and electrically connected with the bottom plate of the flexible circuit board through the second connecting device.

Optionally, the tension in any region of the drive web is less than the tension in any region of the sole plate.

Optionally, the distance between the first end of the driving member and the elastic support portion in the third direction is greater than a second threshold, and the second end of the driving member extends towards the housing and is fixedly connected.

Optionally, the resilient support comprises a primary tensile member proximal to the drive member, and a secondary tensile member distal to the drive member;

wherein the primary tensile member has a coefficient of elasticity less than a coefficient of elasticity of the secondary tensile member.

Optionally, the optical assembly further includes a permanent magnet disposed on at least one side surface of the optical lens, and a magnetic field sensor disposed on the flexible circuit board, and the permanent magnet corresponds to the magnetic field sensor one to one.

Optionally, the drive member comprises a piezoelectric member.

The present disclosure also proposes a projection device, wherein the projection device comprises the above optical assembly.

Has the advantages that: the present disclosure proposes an optical assembly and a projection apparatus; the optical assembly comprises an elastic member, an optical lens arranged on the elastic member, and a driving assembly for driving the elastic member and the optical lens to deflect; the elastic component is fixedly arranged with the optical lens; the driving assembly comprises a shell and a driving component arranged in the shell, and the driving component is elastically connected with the elastic component; the elastic member can be attached to the deformation of the driving member to drive the optical lens to deflect by taking a first direction or/and a second direction as an axis, and the included angle range of the first direction and the second direction is 0-90 degrees. According to the optical assembly, the driving member is arranged in the shell and is elastically connected with the elastic member, so that the force of the driving member can be directly transmitted to the elastic member, the elastic member deflects along with the deformation of the driving member, and the optical lens and the elastic member are fixedly arranged, so that the deflection of the optical lens is directly realized through the deformation of the driving member, and the response speed of the optical assembly is improved.

Drawings

The technical solutions and other advantages of the present disclosure will become apparent from the following detailed description of specific embodiments of the present disclosure, which is to be read in connection with the accompanying drawings.

Fig. 1 is a first perspective view of an optical assembly of the present disclosure.

Fig. 2 is a second perspective view of the optical assembly of the present disclosure.

Fig. 3 is a third perspective view of the optical assembly of the present disclosure.

Fig. 4 is a fourth perspective view of the optical assembly of the present disclosure.

Fig. 5 is an exploded view of an optical assembly of the present disclosure.

Fig. 6 is a cross-sectional view of section AA in fig. 2 of the present disclosure.

Fig. 7 is a cross-sectional view of section BB of fig. 2 of the present disclosure.

Fig. 8 is a functional schematic of the first/second drive members of the present disclosure.

Fig. 9 is a schematic deflection diagram of an optical lens according to the present disclosure.

FIG. 10 is a graph comparing the effect of the optical assembly of the present disclosure with current optical assemblies.

Reference numerals:

100-an elastic member; 200 a drive assembly; 300-an optical lens; 400-an optical component;

11-a resilient support; 111-a first opening; 112-a fixing member; 113-a threaded hole; 114-a primary tensile member; 115-secondary tensile member; 116-an engagement portion; 12-an elastic fixation section; 121-a first elastic fixing plate; 122-a second elastic fixing plate;

20-a drive member; 21-a first drive member; 22-a second drive member; 23-a first end portion; 231-first connection means; 24-a second end portion; 241-second connection means;

30-a housing;

40-a flexible circuit board; 41-a bottom plate; 42-a drive connection plate;

50-a permanent magnet; 60-a magnetic field inductor; 70-a driving chip; 80-a reinforcing plate;

x-a first direction; y-a second direction; z-third direction.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present disclosure. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present disclosure, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the current vibrating mirror structure, the magnet on the vibrating mirror is subjected to the reaction force of the lorentz force of the coil to push the vibrating mirror lens body, and because the coil and the magnet are subjected to isolated force transfer and lack of connection of intermediate entities, the electromagnetic force conducted in an isolated mode needs a certain time to dissipate redundant vibration of the reed so as to reach a stable displacement position. Therefore, the current voice coil motor and the metal reed have slow structural response speed, and the optical lens cannot enter a stable displacement position quickly due to multi-step high-frequency vibration, so that the accurate control of the transmission position of the lens cannot be realized. The present disclosure proposes the following technical solutions based on the above technical problems:

referring to fig. 1 to 10, the present disclosure provides an optical assembly 400, which includes an elastic member 100, an optical lens 300 disposed on the elastic member 100, and a driving assembly 200 for driving the elastic member 100 and the optical lens 300 to deflect; the elastic member 100 is fixedly arranged with the optical lens 300; the driving assembly 200 may include a housing 30 and a driving member 20 disposed in the housing 30, the driving member 20 is elastically connected to the elastic member 100, the driving member 20 may deform, the elastic member 100 may be attached to the deformation of the driving member 20 to drive the optical lens 300 to deflect with the first direction or/and the second direction as an axis, and an included angle range of the first direction and the second direction is 0 ° to 90 °.

In this embodiment, referring to fig. 1, the first direction may be an X direction, the second direction may be a Y direction, and an included angle between the first direction and the second direction may be 90 °. For example, when the direction in which the driving member is deformed is a third direction perpendicular to a plane in which the first direction and the second direction are located, the third direction may be a Z direction.

The present disclosure provides an optical assembly 400 and a projection apparatus, the optical assembly 400 includes an elastic member 100, an optical lens 300 disposed on the elastic member 100, and a driving assembly 200 for driving the elastic member 100 and the optical lens 300 to deflect; the elastic member 100 is fixedly arranged with the optical lens 300; the driving member 20 includes a housing 30 and at least one driving member 20 disposed in the housing 30, and the driving member 20 is elastically connected to the elastic member 100.

According to the present disclosure, the driving member 20 is disposed in the housing 30, since the driving member 20 is elastically connected to the elastic member 100, the force of the driving member 20 is directly transmitted to the elastic member 100, so that the elastic member 100 deflects depending on the deformation of the driving member 20, and the optical lens 300 is fixedly disposed with the elastic member 100, so that the deformation of the driving member 20 directly realizes the deflection of the optical lens 300, and the response speed of the optical lens 300 is increased.

The technical solution of the present disclosure will now be described with reference to specific embodiments.

In the optical assembly 400 of the present disclosure, referring to fig. 1 to 5, the driving member 20 may include at least one first driving member 21 disposed along the first direction X and at least one second driving member 22 disposed along the second direction Y, the first driving member 21 is elastically connected to the elastic member 100, and the second driving member 22 is elastically connected to the elastic member 100. The elastic member 100 is deflected by the deformation of the first driving member 21 in the third direction Z about the second direction Y, and the elastic member 100 is deflected by the deformation of the second driving member 22 in the third direction Z about the first direction X, wherein the third direction Z is perpendicular to the plane in which the first direction X and the second direction Y are located.

In this embodiment, an included angle between the first direction X and the second direction Y may be a non-zero angle. In the following embodiments, referring to the top view of the optical assembly 400 in fig. 2, the included angle between the first direction X and the second direction Y may be 90 °, that is, the first direction X is perpendicular to the second direction Y, the first direction X may be a horizontal direction, and the second direction Y may be a vertical direction.

In this embodiment, the present disclosure provides a first driving member 21 and a second driving member 22 in the housing 30, since the driving member 20 is elastically connected to the elastic member 100, the force of the driving member 20 is directly transmitted to the elastic member 100, so that the elastic member 100 can deflect by the deformation of the first driving member 21 with the second direction Y as an axis, and the elastic member 100 can deflect by the deformation of the second driving member 22 with the first direction X as an axis, while the optical lens 300 is fixedly disposed with the elastic member 100, so that the deflection of the optical lens 300 is directly realized by the deformation of the first driving member 21 and the second driving member 22, and the response speed of the optical lens 300 deflection is improved.

In the optical assembly 400 of the present disclosure, referring to fig. 5, the elastic member 100 may include an elastic supporting portion 11 and an elastic fixing portion 12, and the elastic fixing portion 12 may include two first elastic fixing plates 121 disposed along the first direction X and two second elastic fixing plates 122 disposed along the second direction Y; the first elastic fixing plate 121 and the second elastic fixing plate 122 extend from the elastic support portion 11 to the inside of the housing 30, the first elastic fixing plate 121 and the second elastic fixing plate 122 are vertically connected to the elastic support portion 11, two adjacent first elastic fixing plates 121 and two adjacent second elastic fixing plates 122 are vertically arranged, and an accommodating cavity is defined by the two first elastic fixing plates 121 and the two second elastic fixing plates 122.

In this embodiment, the optical lens 300 may be embedded in the accommodating cavity, and the optical lens 300 is fixedly connected to the first elastic fixing plate 121 and the second elastic fixing plate 122.

In this embodiment, the elastic member 100 may be a metal spring with a good elastic coefficient, and the disclosure is not particularly limited to the type of the metal spring. The metal spring plate comprises an elastic support part 11 fixedly arranged with the shell 30, and the elastic support part 11 can be a metal support plate parallel to a plane where the first direction X and the second direction Y are located. The elastic support 11 may be rectangular in a direction of a top view of the optical assembly 400.

In this embodiment, the elastic supporting portion 11 further includes first openings 111 disposed at four corners, and the first openings 111 correspond to the fixing members 112 of the optical assembly 400. For example, the fixing element 112 may be, but is not limited to, a screw corresponding to a threaded hole 113 on the housing 30, the screw penetrating through the first opening 111 and abutting the threaded hole 113 to fix the elastic member 100 to the housing 30.

In this embodiment, the two first elastic fixing plates 121 and the two second elastic fixing plates 122 enclose the accommodating cavity, the optical lens 300 is accommodated in the accommodating cavity, and the optical lens 300 may be fixedly connected to at least two of the two first elastic fixing plates 121 and the two second elastic fixing plates 122 by dispensing. That is, the optical lens 300 is fixed to the elastic member 100, and the disclosure is not particularly limited to how many fixing plates are connected.

In the present embodiment, in order to ensure the fixing property of the optical lens 300 and the elastic member 100 and prevent the optical assembly 400 from separating from the elastic member 100 due to the impact force, the optical lens 300 may be fixedly connected to two first elastic fixing plates 121 and two second elastic fixing plates 122.

In the present embodiment, the optical lens 300 may be, but is not limited to, one of a galvanometer, a lens, a reflector, and the like, and the galvanometer is taken as an example in the following embodiments for description.

In this embodiment, since the elastic fixing plate is mainly used for fixing the optical lens 300, in the setting of the elastic coefficients of the elastic fixing portion 12 and the elastic supporting portion 11, the elastic coefficient of the elastic supporting portion 11 may be smaller than the elastic coefficient of the elastic fixing portion 12, so as to prevent the optical lens 300 from vibrating back and forth in the thickness direction thereof. Referring to the front view of the optical assembly 400 in fig. 4, the thickness direction of the optical lens 300 may be a third direction Z perpendicular to a plane in which the first direction X and the second direction Y are located, that is, the third direction Z may be a vertical direction.

In this embodiment, the elastic support portion 11 may further include an engaging portion 116, and an orthogonal projection of the engaging portion 116 on the optical lens 300 is located on the optical lens 300. The engaging portion 116 is disposed such that the optical lens 300 is located under the engaging portion 116 to assist the fixing of the optical lens 300 by the first elastic fixing plate 121 and the second elastic fixing plate 122.

In the optical assembly 400 of the present disclosure, referring to fig. 5, the elastic member 100 further includes a first baffle (not shown) located in the accommodating cavity, the first baffle is vertically connected to the first elastic fixing plate 121 and the second elastic fixing plate 122, and the first baffle is disposed parallel to the optical lens 300.

In this embodiment, the optical lens 300 includes a first surface far away from the elastic support portion 11, and a distance between the first blocking plate and the first surface of the optical lens 300 in a third direction Z is greater than a first threshold, where the third direction Z is perpendicular to a plane where the first direction X and the second direction Y are located. The size of the first threshold is not particularly limited in the present disclosure, and may be defined according to actual situations.

In this embodiment, when a user uses a projection apparatus, if the projection apparatus drops due to an objective reason and receives a certain impact force, under the effect of the impact force, the existing optical assembly 400 easily causes permanent deformation or fracture of the reed, resulting in a technical problem of reduction of the transmission precision of the galvanometer or inaccurate positioning. In use of the optical assembly 400 of the present disclosure, due to the existence of the elastic supporting portion 11, a buffer gap exists between the elastic supporting portion 11 and the optical lens 300, so that the influence of dropping or impact on the optical assembly 400 is effectively avoided.

In this embodiment, the elastic support portion 11 further includes a second opening (not shown) that communicates with the receiving cavity. The size of the second opening can be specifically set according to the area of the light emitting surface required by the optical assembly 400, and in this embodiment, it is only required to ensure that the optical lens 300 can contact with the elastic support portion 11 when the optical lens moves towards the elastic support portion 11.

In the optical assembly 400 of the present disclosure, referring to fig. 5 to 7, the first driving member 21 and the second driving member 22 respectively include a first end 23 close to the elastic supporting portion 11 and a second end 24 far away from the elastic supporting portion 11; the first end 23 of the first driving member 21 is fixedly connected to the first elastic fixing plate 121 through a first connecting device 231, the first end 23 of the second driving member 22 is fixedly connected to the second elastic fixing plate 122 through the first connecting device 231, and the second ends 24 of the first driving member 21 and the second driving member 22 are fixedly connected to the flexible circuit board 40 of the driving assembly 200 through a second connecting device 241.

In this embodiment, the first driving member 21 and the second driving member 22 may be, but are not limited to, piezoelectric members. For example, referring to fig. 8, the material of the piezoelectric member may be ceramic, and when a current enters the piezoelectric member, the piezoelectric member will deform along the third direction Z; since the piezoelectric member is connected to the first elastic fixing plate 121 or the second elastic fixing plate 122 through the first connecting means 231, when the piezoelectric member is deformed in the + Z direction, the piezoelectric member will give a force in the + Z direction to the first elastic fixing plate 121 or the second elastic fixing plate 122.

In this embodiment, when the first driving member 21 generates the deformation in the + Z direction, the first driving member 21 will apply a force to the first elastic fixing plate 121 in the + Z direction, so that the first elastic fixing plate 121 generates the displacement in the + Z direction, and since the optical lens 300 is fixed to the elastic member 100, the displacement generated by the elastic member 100 will drive the optical lens 300 to deflect around the second direction Y as an axis; similarly, when the second driving member 22 generates the deformation in the + Z direction, the second driving member 22 will apply a force to the second elastic fixing plate 122 in the + Z direction, so that the second elastic fixing plate 122 generates the displacement in the + Z direction, and since the optical lens 300 is fixed to the elastic member 100, the displacement generated by the elastic member 100 will drive the optical lens 300 to deflect around the first direction X as an axis.

In this embodiment, the first driving member 21 and the second driving member 22 are directly connected to the elastic member 100, and the deformation generated by the first driving member 21 and the second driving member 22 can be directly transmitted to the elastic member 100, so that the elastic member 100 and the optical lens 300 can perform a certain angle of deflection, thereby increasing the response speed of the optical lens 300 in deflection.

In the present embodiment, since the amount of deformation of the piezoelectric member is related to the magnitude of the current and the material of the piezoelectric member itself, the greater the input driving current is, the greater the amount of deformation of the piezoelectric member is, without changing the material properties; therefore, the magnitude of the driving current input to the piezoelectric member needs to be adaptively selected according to the deflection angle of the optical lens 300.

Referring to fig. 5 to 7, the optical assembly 400 may further include a permanent magnet 50 disposed on at least one side surface of the optical lens 300, and a magnetic field sensor 60 disposed in the housing 30, wherein the permanent magnet 50 corresponds to the magnetic field sensor 60 one to one.

In this embodiment, the magnetic field inductor 60 may be disposed on the flexible circuit board 40. Since the optical lens 300 mainly deflects about the first direction X and the second direction Y, two permanent magnets 50 are disposed on the diagonal line of the optical lens 300, and the magnetic field sensor 60 corresponding to the two permanent magnets 50 is disposed on the flexible circuit board 40 inside the housing 30.

In the present embodiment, the magnetic field sensor 60 is used for determining the position relationship between the permanent magnet 50 and the magnetic field sensor 60 according to the magnetic flux density in the third direction Z, and when the distance between the permanent magnet 50 and the magnetic field sensor 60 is smaller, the magnetic flux density acquired by the magnetic field sensor 60 is larger, and the deflection angle of the optical lens 300 is smaller; and when the distance between the permanent magnet 50 and the magnetic field inductor 60 is larger, the magnetic flux density acquired by the magnetic field inductor 60 is smaller, and the deflection angle of the optical lens 300 is larger, so that the magnetic field inductor 60 and the permanent magnet 50 are matched, and the monitoring of the deflection angle of the optical lens 300 can be realized.

In this embodiment, the magnetic flux density acquired by the magnetic field sensor 60 can be transmitted to the control terminal through the flexible circuit board 40 to output a feedback signal for controlling the driving current in the driving member 20, so as to provide a positive or negative compensation corresponding to the driving current of the driving member 20, thereby realizing more precise transmission and positioning control of the lens.

In the present embodiment, the magnetic field sensor 60 may be a hall sensor or a magnetoresistive effect sensor.

Referring to fig. 9, when driving currents of different magnitudes are input to the piezoelectric elements, the piezoelectric elements can deflect the optical lens 300 along the first direction X or/and the second direction Y at different angles, such as θ_1y、θ_2y、θ_3yAnd theta_1x、θ_2x、θ_3x。

Referring to fig. 10, in the optical assembly 400 of the present disclosure, since the driving member 20 is elastically connected to the elastic member 100, a force generated by the driving member 20 may be directly transmitted to the elastic member 100, so that the elastic member 100 deflects through the deformation of the driving member 20, and the optical lens 300 is fixedly disposed with the elastic member 100, so that the deflection of the optical lens 300 is directly realized by the deformation of the driving member 20, and the deflection response speed of the optical lens 300 is improved, the left diagram is a current galvanometer assembly, which only repeats 1 pixel point vibration to 4 pixel points, and the right diagram is a galvanometer assembly of the present disclosure, which repeats 1 pixel point vibration to 16 pixel points, thereby realizing the multiple pixel replication effect.

In the optical assembly 400 of the present disclosure, referring to fig. 5 to 7, the flexible circuit board 40 is configured to provide a current in a predetermined direction to the driving member 20 to deform the driving member 20, and the flexible circuit board 40 includes a bottom plate 41 and a plurality of driving connection plates 42 perpendicular to the bottom plate 41; a first side of the driving connecting plate 42 is fixed and electrically connected to a first driving member 21 or a second driving member 22 through the first connecting device 231, a second side of the driving connecting plate 42 is fixed and connected to the first elastic fixing plate 121 or the second elastic fixing plate 122, and the first driving member 21 and the second driving member 22 are electrically connected to the bottom plate 41 of the flexible circuit board 40 through the second connecting device 241.

In the present embodiment, since the piezoelectric members are deformed by inputting corresponding positive and negative currents at different ends, the present disclosure rearranges the flexible circuit board 40 such that the flexible circuit board 40 is composed of the base plate 41 and the drive connection plate 42. For example, the first end 23 of the piezoelectric member inputs a negative current through the driving connection plate 42, the second end 24 of the piezoelectric member inputs a positive current through the bottom plate 41, and the corresponding first connection device 231 may be, but is not limited to, a negative conductive solder paste, and the second connection device 241 may be, but is not limited to, a positive conductive solder paste; in addition, a negative conductive solder paste may be connected to the first side surface of the piezoelectric member, and a negative current may be introduced to the first side surface of the piezoelectric member through the negative conductive solder paste; the positive electrode conductive solder paste can be connected with the second side face of the piezoelectric component, the first side face and the second side face are arranged oppositely, positive current is led into the second side face of the piezoelectric component through the positive electrode conductive solder paste, and positive and negative electrode currents of the first side face and the second side face drive the piezoelectric component to deform along the +/-Z direction.

In this embodiment, the first side of the driving connection board 42 is fixed and electrically connected to the piezoelectric element through a negative conductive solder paste, and the second side of the driving connection board 42 is fixed and connected to the first elastic fixing plate 121 or the second elastic fixing plate 122 through dispensing. Therefore, when the piezoelectric member deforms, the piezoelectric member transmits the force generated by the deformation to the elastic member 100 through the negative conductive solder paste, the driving connection plate 42 and the dispensing, and the elastic member 100 deflects the elastic member 100 and the optical lens 300 by a certain angle according to the driving force in the + Z direction, thereby improving the response speed of the deflection of the optical lens 300.

In the present embodiment, when the piezoelectric member is deformed, the driving connecting plate 42 will follow the piezoelectric member to perform a high-frequency reciprocating motion, and if the driving connecting plate 42 is in a stretching state when the piezoelectric member does not start to move, the driving connecting plate 42 may fail or break after operating for a certain time. The present disclosure can therefore make the tensile force in any area of the drive connecting plate 42 smaller than the tensile force in any area of the bottom plate 41. For example, the length of the driving connecting plate 42 is set to be greater than the length of the piezoelectric member after deformation, that is, any region of the driving connecting plate 42 is not subjected to a corresponding tensile force during the operation of the piezoelectric member.

In the optical assembly 400 of the present disclosure, referring to fig. 5 to 7, a distance between the first end 23 of the first driving member 21 or the second driving member 22 and the elastic support 11 in the third direction Z is greater than a second threshold, and the second end 24 of the first driving member 21 or the second driving member 22 extends toward the housing 30 and is fixedly connected thereto.

In this embodiment, the specific size of the second threshold is not specifically limited in this disclosure.

In this embodiment, the piezoelectric member will deform towards both ends when energized. Whereas the second end 24 of the piezoelectric member is not connected to the elastic member 100, the amount of deformation of the second end 24 is an ineffective deformation to the deflection of the elastic member 100. The present disclosure extends the second end 24 of the piezoelectric member toward the housing 30 and is fixedly connected to the bottom of the housing 30. Since the second end 24 of the piezoelectric member is connected to the bottom of the housing 30, the amount of deformation generated at both ends of the piezoelectric member will be reflected at the first end 23, which increases the rate of deformation generated by the piezoelectric member and further increases the response speed of deflection of the optical lens 300.

In the optical assembly 400 of the present disclosure, please refer to fig. 2, the elastic supporting portion 11 includes a primary stretching member 114 close to the first driving member 21 or the second driving member 22, and a secondary stretching member 115 far from the first driving member 21 or the second driving member 22; the modulus of elasticity of primary tensile member 114 is greater than the modulus of elasticity of secondary tensile member 115.

In this embodiment, the elastic member 100 may be deformed only by a portion of the elastic member 100 when the elastic member 100 is deflected. Such as the elastic material adjacent the first aperture 111, the elastic material in this region constituting the secondary tensile member 115, which does not need to be stretched; and the elastic material near the first driving member 21 and the second driving member 22, the elastic material in this area constitutes the main stretching member 114, and when the piezoelectric member gives a force in the + Z direction to the elastic member 100, the force in the + Z direction will make the main stretching member 114 away from the housing 30 to deflect the optical lens 300.

In this embodiment, the elastic material in different areas on the elastic member 100 is set to have different elastic coefficients, so that the force generated by the piezoelectric member can be quickly transmitted to the elastic member 100, and since the elastic coefficient of the main stretching member 114 is relatively large, the area is more easily stretched, the rate of the elastic member 100 deflecting is increased, and the response speed of the optical lens 300 deflecting is further increased.

In this embodiment, the optical assembly 400 further includes a stiffener 80 located on one side of the bottom plate 41 of the flexible circuit board 40, and the stiffener 80 is used for protecting the corresponding flexible circuit board 40. In addition, the reinforcing plate can also be used for adjusting the height of the magnetic field inductor, namely adjusting the distance between the magnetic field inductor and the permanent magnet, so that more accurate electromagnetic distance induction is realized.

In this embodiment, the optical assembly 400 further includes a driving chip 70 located on the flexible circuit board 40, the driving chip 70 is a control center of the optical assembly 400, and the structure is conventional in the art, and the disclosure is not described in detail.

The present disclosure also proposes a projection device comprising the above-described optical assembly 400.

The present disclosure provides an optical assembly and a projection apparatus, the optical assembly includes an elastic member, an optical lens disposed on the elastic member, and a driving assembly for driving the elastic member and the optical lens to deflect; the elastic component is fixedly connected with the optical lens; the driving member comprises a shell and at least one driving member arranged in the shell, and the driving member is elastically connected with the elastic member. According to the optical lens, the shell is internally provided with the at least one driving member, and the driving member is elastically connected with the elastic member, so that the force of the driving member is directly transmitted to the elastic member, the elastic member deflects through the deformation of the driving member, and the optical lens and the elastic member are fixedly arranged, so that the deflection of the optical lens is directly realized through the deformation of the driving member, and the response speed of the deflection of the optical lens is improved.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The optical assembly and the projection apparatus provided by the embodiments of the present disclosure are described in detail above, and the principles and embodiments of the present disclosure are explained herein by applying specific examples, and the above description of the embodiments is only used to help understanding the technical solutions and the core ideas of the present disclosure; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.