Optical mechanical module

Abstract

The application discloses an optical-mechanical module, comprising: a fixed part, comprising an image light generating module adapted to emit image light; a lens part for projecting the image light, the lens part comprising a lens barrel, a lens group arranged in the lens barrel, and a carrier, the carrier being arranged on the circumferential side of the lens barrel near one end of the fixed part, the lens part being movably connected to the fixed part; a motor adapted to drive the lens part to move relative to the fixed part, the motor comprising at least one piezoelectric actuator and a moving element, the piezoelectric actuator being arranged in the fixed part, the moving element being connected to the lens part at a connecting end, and the moving element being coupled to the piezoelectric actuator at a driving end, the piezoelectric actuator being adapted to drive the moving element to move in a direction parallel to the optical axis, thereby driving the lens part to move relative to the fixed part. The application aims to provide an optical-mechanical module with a smaller volume, and to improve the virtual image distance response speed and accuracy of the optical-mechanical module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a light machine module. BACKGROUND

[0002] With the wide application of virtual reality (VR), augmented reality (AR), mixed reality (MR) and other technologies in many fields such as film, game, network teaching, network conference, digital exhibition, social and shopping, users have higher and higher requirements for immersive experience. As a key component to achieve realistic visual effects, the virtual image distance module is becoming increasingly important.

[0003] However, the existing module has the following defects: first, the focal length of the traditional AR light machine projection lens is fixed at the design time, which cannot dynamically adapt to different use scenarios (such as near-eye display, long-distance projection) or user vision differences (such as myopia, presbyopia). For example, when a user wears AR glasses to watch close-range content, blurring may occur, and manual adjustment is still required when switching to a long-distance scene, which seriously affects the sense of immersion. Second, early projection devices rely on mechanical knobs or complex structures for manual focusing, which is tedious and has limited precision. For example, traditional projectors need to repeatedly adjust the lens position to obtain a clear image, which is difficult to meet the demand for instant response of AR devices. Third, although some automatic focusing solutions (such as voice coil motor drive) can achieve electric adjustment, they are relatively large in size and high in energy consumption, which is contrary to the development trend of lightweight and low power consumption of AR devices. For example, the motor system of the traditional automatic focusing lens may occupy a large space of the light machine module, affecting the overall design. Finally, existing AR devices generally lack adaptive adjustment capability for user vision differences. For example, myopic users need to wear additional corrective lenses, which reduces the wearing comfort, and presbyopic users have difficulty balancing their visual experience at different distances.

[0004] Therefore, a new light machine module is needed to promote the development of the industry in a more dynamic and lightweight direction. SUMMARY

[0005] One purpose of the present application is to reduce the volume of the light machine module while improving the dynamic zooming precision and speed of the light machine module.

[0006] Another purpose of the present application is to realize the lightweight and low energy consumption of the light machine module.

[0007] To achieve the above purposes, the technical solution adopted by the present application is as follows: a light machine module, comprising:

[0008] a fixed part comprising an image light generating module adapted to emit image light;

[0009] a lens portion for projecting the image light, the lens portion comprising a lens barrel, a lens group disposed in the lens barrel, and a carrier disposed on a periphery of the lens barrel near one end of the lens barrel, the lens portion being movably connected to the fixed portion;

[0010] a motor adapted to drive the lens portion to move relative to the fixed portion, the motor comprising at least one piezoelectric actuator disposed on the fixed portion and a moving element, a connecting end of the moving element being connected to the lens portion, a driving end of the moving element being coupled to the piezoelectric actuator, the piezoelectric actuator being adapted to drive the moving element to move in a direction parallel to the optical axis, thereby driving the lens portion to move relative to the fixed portion.

[0011] As a preferred embodiment, the fixed portion comprises a base frame, the image light generating module comprises a light emitting assembly and a prism assembly, the prism assembly is disposed inside the base frame, the light emitting assembly is disposed outside the base frame, the base frame has a top surface and a bottom surface perpendicular to the optical axis direction and four side surfaces surrounding the periphery, the lens portion is disposed on the top surface of the base frame, one of the side surfaces of the base frame is a mounting side surface, and the piezoelectric actuator is disposed on the mounting side surface.

[0012] As a preferred embodiment, the light emitting assembly comprises a first light source assembly, a second light source assembly, and a third light source assembly, the bottom surface of the base frame has a third light transmission hole, the base frame has a first light transmission hole and a second light transmission hole on two side surfaces adjacent to the mounting side surface, respectively, the first light source assembly comprises a first light emitting surface disposed opposite the first light transmission hole and a first control chip disposed below the bottom surface of the base frame, the second light source assembly comprises a second light emitting surface disposed opposite the second light transmission hole and a second control chip disposed below the bottom surface of the base frame, and the third light source assembly comprises a third light emitting surface disposed opposite the third light transmission hole and a third control chip disposed between the third light emitting surface and the first control chip and the second control chip.

[0013] As a preferred embodiment, the motor further comprises a motor circuit board disposed on the mounting side surface;

[0014] The first light source assembly further comprises a first circuit board electrically connecting the first control chip and the first light emitting surface, the first circuit board is connected to a side of the first light emitting surface near the mounting side surface and extends to the outside of the mounting side surface to electrically connect with the motor circuit board, and then extends from a side of the mounting side surface near the bottom surface of the base frame to connect with the first control chip on the bottom surface of the base frame;

[0015] The second light source assembly comprises a second circuit board electrically connecting the second control chip and the second light emitting surface, the second circuit board is connected to the side of the second light emitting surface close to the mounting side and extends to the outside of the mounting side to electrically connect with the motor circuit board, and then extends from the side of the mounting side close to the bottom surface of the base frame to connect the second control chip with the bottom surface of the base frame.

[0016] The third light source assembly comprises a third circuit board electrically connecting the third control chip and the third light emitting surface, the third circuit board is connected to the side of the third light emitting surface close to the mounting side and extends to the outside of the mounting side to electrically connect with the motor circuit board, and then returns to the bottom surface of the base frame to connect the third control chip.

[0017] As a preferred, the first circuit board and the second circuit board are stacked on the opposite side of the mounting side.

[0018] As a preferred, the motor comprises a motor housing mounted on the base frame, the motor housing comprises a first housing main body arranged on the mounting side, and a first cover arranged on the first housing main body, a first accommodating cavity is defined between the first housing main body and the first cover, the piezoelectric actuator and the driving end of the mover are located in the first accommodating cavity; the first accommodating cavity has a first opening close to the lens part, and the mover extends to the lens part through the first opening.

[0019] As a preferred, the motor further comprises a motor circuit board arranged in the first accommodating cavity, one end of the motor circuit board is electrically connected with the piezoelectric actuator, and the motor circuit board further extends out of the first accommodating cavity to be electrically connected with the light emitting assembly.

[0020] As a preferred, the motor comprises two piezoelectric actuators, the two piezoelectric actuators are arranged on the two sides of the driving end of the mover respectively; the motor further comprises a clamping component, the clamping component comprises a resilient portion, a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion abut on the piezoelectric actuators respectively, and the resilient portion makes the first clamping portion and the second clamping portion always maintain a clamping force to clamp the piezoelectric actuators inwardly.

[0021] As a preferred, the resilient portion is arranged above the mover, the resilient portion has a first extension surface and a second extension surface connected to each other, and an included angle between the first extension surface and the second extension surface is α, and α≤180°.

[0022] As a preferred, the included angle between the first extending surface and the second extending surface is α, and α < 180°.

[0023] As a preferred, the first extending surface has a first through hole, the second extending surface has a second through hole, and the motor circuit board is adapted to pass through the first through hole and the second through hole to connect the piezoelectric actuators on both sides of the mover.

[0024] As a preferred, the first clamping part has a first abutting end which is inwardly bent, and the second clamping part has a second abutting end which is inwardly bent, and the first abutting end and the second abutting end press on the piezoelectric actuators on both sides of the mover.

[0025] As a preferred, the piezoelectric actuator is a resonator, the resonator includes a long strip-shaped piezoelectric body and a semi-circular friction head, the planar end of the friction head is connected with the piezoelectric body, and the arc end is connected with the mover, and the piezoelectric body is adapted to squeeze the friction head to drive the mover to rotate relative to the piezoelectric body.

[0026] As a preferred, the carrier is integrally formed with the lens barrel, the carrier has a first cut edge, a second cut edge, a third cut edge and a fourth cut edge, the four cut edges are respectively parallel to the four edges of the top surface of the base frame, and each cut edge is circularly arc transitioned with each other;

[0027] The first cut edge is adjacent to the mounting side surface of the base frame, the first cut edge extends to a periphery side to form a mover connecting part, a connecting groove is formed on the mover connecting part, and the mover connecting end extends into the connecting groove to form a connection with the mover connecting part.

[0028] As a preferred, the second cut edge and the fourth cut edge are opposite, and the length of the second cut edge is the same as the length of the fourth cut edge, the first cut edge and the third cut edge are opposite, and the length of the third cut edge is greater than the length of the first cut edge.

[0029] As a preferred, the connecting groove includes a first side surface, a second side surface and a bottom surface, the gap between the mover connecting end and the first side surface and the second side surface of the connecting groove is recorded as L1, L1 > 100 μm, the gap between the mover connecting end and the bottom surface of the connecting groove is recorded as L2, the length of the base frame along the direction parallel to the first cut edge is recorded as L, 0.01 < L1 / L < 0.05, and 0.01 < L2 / L < 0.05.

[0030] As a preferred embodiment, the motor housing further includes a second housing body disposed on the top surface of the base frame and a second cover disposed on the second housing body, wherein a second receiving cavity is defined between the second housing body and the second cover, and the carrier is movably disposed within the second receiving cavity; the first housing body is disposed below the second cover, the upper end of the first cover extends to the inner side of the second cover, and the first cover is received within the second receiving cavity.

[0031] As a preferred embodiment, a guiding structure is included, comprising a first guide member and a second guide member, the first guide member and the second guide member being located diagonally opposite each other on the carrier, the first guide member and the second guide member being both guide rods, or the first guide member being a guide rod and the second guide member being a ball bearing; the guiding structure is accommodated within the second accommodating cavity.

[0032] As a preferred embodiment, it includes at least one temperature sensing component, which is disposed on the carrier side of the lens portion, and / or disposed on one side of the first control chip, the second control chip and the third control chip in the light-emitting component.

[0033] As a preferred embodiment, the temperature sensing component is disposed in the middle region between the end face of the lens portion near the object side and the end face near the base frame.

[0034] Compared with the prior art, the beneficial effects of this application are as follows:

[0035] (1) The use of piezoelectric actuators for fast switching in this application is beneficial to improving the virtual image distance-to-ground response speed and accuracy of the optomechanical module.

[0036] (2) The piezoelectric actuator used in this application can achieve power-off self-locking. After self-locking, it can maintain the distance between the lens and the optical element unchanged. It does not require an additional locking structure inside the optical-mechanical module, which is conducive to the miniaturization of the variable aperture.

[0037] (3) The optical module of this application does not need to be powered on continuously, and no additional work number is required after power failure, which is beneficial to improving the battery life of the camera module. Attached Figure Description

[0038] Figure 1 This is an exploded view of an optomechanical module in one embodiment of this application.

[0039] Figure 2 This is a perspective view of an optomechanical module in one embodiment of this application.

[0040] Figure 3 This is a perspective view of the internal structure of the optomechanical module in one embodiment of this application.

[0041] Figure 4 This is a perspective view of the base frame of the optomechanical module in one embodiment of this application.

[0042] Figure 5 This is a perspective view of the prism assembly of the optomechanical module in one embodiment of this application.

[0043] Figure 6 This is a perspective view of the first light source component of the optomechanical module in one embodiment of this application.

[0044] Figure 7 This is a perspective view of the second light source component of the optomechanical module in one embodiment of this application.

[0045] Figure 8 This is a perspective view of the third light source component of the optomechanical module in one embodiment of this application.

[0046] Figure 9 This is a perspective view of another internal structure of the optomechanical module in one embodiment of this application.

[0047] Figure 10 This is a perspective view of the lens section of the optomechanical module in one embodiment of this application.

[0048] Figure 11 This is a diagram showing the gap between the lens section and the mover of the optomechanical module in one embodiment of this application.

[0049] Figure 12 This is an exploded view of the internal components of the motor in an embodiment of the optomechanical module of this application.

[0050] Figure 13 This is a perspective view of the first cover of the optomechanical module in one embodiment of this application.

[0051] Figure 14 This is a perspective view of the piezoelectric actuator and mover of the optomechanical module in one embodiment of this application.

[0052] Figure 15 This is a perspective view of the internal components of the motor in an embodiment of the optomechanical module of this application.

[0053] Figure 16 This is a location diagram of the temperature sensing component of the optomechanical module in one embodiment of this application.

[0054] Figure 17 This is a location diagram of the temperature sensing component of the optomechanical module in another embodiment of this application.

[0055] Figure 18 This is a linear relationship graph between the temperature drift of the lens and the ambient temperature in one embodiment of this application.

[0056] Figure 19 These are the performance parameters of the optomechanical module in one embodiment of this application.

[0057] Figure 20 This is an optical path diagram of the internal lens and optical elements of the optomechanical module in one embodiment of this application.

[0058] Figure 21 This is a MTF curve of the optomechanical module diffraction in one embodiment of this application.

[0059] Figure 22 This is a diagram showing the astigmatic field curve and aberration map of the optomechanical module in one embodiment of this application.

[0060] Figure 23 This is a relative illumination diagram of the optomechanical module in one embodiment of this application.

[0061] Figure 24 This is a flowchart of a hardware solution in one embodiment of this application.

[0062] Figure 25 This is a flowchart of a software solution in one embodiment of this application.

[0063] In the picture:

[0064] 1. Fixing part;

[0065] 11. Light-emitting components;

[0066] 111. First light source assembly; 1111. First light-emitting surface; 1112. First control chip; 1113. First circuit board; 1114. First pin;

[0067] 112. Second light source assembly; 1121. Second light-emitting surface; 1122. Second control chip; 1123. Second circuit board; 1124. Second pin;

[0068] 113. Third light source assembly; 1131. Third light-emitting surface; 1132. Third control chip; 1133. Third circuit board; 1134. Third pin;

[0069] 12. Base frame; 121. First light-transmitting hole; 122. Second light-transmitting hole; 123. Third light-transmitting hole; 124. Light-emitting hole; 125. Mounting side;

[0070] 13. Prism assembly; 131. First beam-splitting surface; 132. Second beam-splitting surface; 133. Third beam-splitting surface; 134. Light-emitting surface;

[0071] 2. Lens section; 21. Lens barrel; 22. Lens group; 200. Center plane;

[0072] 23. Carrier; 231. First cut edge; 232. Second cut edge; 233. Third cut edge; 234. Fourth cut edge; 235. Moving part connection; 2350. Connecting groove; 2351. First side surface; 2352. Second side surface; 2353. Bottom surface of connecting groove;

[0073] 3. Motor;

[0074] 31. Motor housing;

[0075] 311. First shell body; 312. First cover; 313. First receiving cavity; 3130. First opening; 3111. First side wall; 3112. Second side wall; 3113. Third side wall; 3121. First end; 3122. Second end; 3123. Groove;

[0076] 314. Second shell body; 315. Second cover; 316. Second receiving cavity; 3160. Second opening;

[0077] 32. Piezoelectric actuator; 321. Piezoelectric element; 322. Friction head;

[0078] 33. Moving part; 331. Driving end; 332. Connecting end;

[0079] 34. Motor circuit board; 341. External connection part; 3411. First side; 3412. Second side; 3413. Third side; 342. Piezoelectric connection part; 343. Flexible connection part;

[0080] 35. Clamping component; 351. Elastic part; 352. First clamping part; 3521. First extending surface; 3520. First opening; 3522. First abutting end; 353. Second clamping part; 3531. Second extending surface; 3530. Second opening; 3532. Second abutting end;

[0081] 4. Guide structure; 41. First guide component; 42. Second guide component;

[0082] 5. Temperature sensing component; 51. First temperature sensor; 52. Second temperature sensor. Detailed Implementation

[0083] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0084] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0085] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0086] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0087] like Figures 1-3 As shown, the optical engine module of this application includes a fixed part 1, a lens part 2 movably disposed on the fixed part 1, and a motor 3 for driving the lens part 2 to move relative to the fixed part 1. The fixed part 1 includes an image generation module adapted to emit image light, the lens part 2 is used to project image light, and the motor 3 drives the lens part 2 to move relative to the fixed part 1 to achieve image distance adjustment.

[0088] The motor 3 includes at least one piezoelectric actuator 32 and a mover 33. The piezoelectric actuator 32 is disposed on the fixed part 1. The connecting end 332 of the mover 33 is connected to the lens part 2. The driving end 331 of the mover 33 is coupled to the piezoelectric actuator 32, so that the piezoelectric actuator 32 is adapted to drive the mover 33 to move in a direction parallel to the optical axis, thereby driving the lens part 2 to move relative to the fixed part 1.

[0089] like Figure 1 and Figure 2 As shown, the fixing part 1 includes a base frame 12 and an image generation module. The image generation module includes a light-emitting component 11 and a prism component 13, which are mounted on the base frame 12. The three-color light emitted by the light-emitting component 11 is combined by the prism component 13 to form image light.

[0090] In some embodiments, the light-emitting component 11 includes a first light source component 111, a second light source component 112, and a third light source component 113, which are respectively adapted to emit red light, blue light, and green light. The prism component 13 is a three-way beam combining / splitting prism. In some embodiments of this application, the prism component 13 is mainly used to achieve beam combining of light, and it is adapted to combine the light emitted by the first light source component 111, the second light source component 112, and the third light source component 113 to form image light.

[0091] In some embodiments, such as Figure 4 and Figure 5 As shown, the base frame 12 has a hexahedral structure with a hollow interior. The base frame 12 has a top surface and a bottom surface perpendicular to the optical axis, as well as four sides surrounding the periphery.

[0092] A prism assembly 13 is disposed within a base frame 12. The prism assembly 13 has a first beam-splitting surface 131, a second beam-splitting surface 132, a third beam-splitting surface 133, and a light-emitting surface 134. The base frame 12 has a first light-transmitting hole 121 opposite to the first beam-splitting surface 131, a second light-transmitting hole 122 opposite to the second beam-splitting surface 132, a third light-transmitting hole 123 opposite to the third beam-splitting surface 133, and a light-emitting through-hole 124 opposite to the light-emitting surface 134. The light-emitting through-hole 124 is formed on the top surface of the base frame 12, the first light-transmitting hole 121 and the second light-transmitting hole 122 are respectively formed on two opposite sides of the base frame 12, and the third light-transmitting hole 123 is formed on the bottom surface of the base frame 12.

[0093] like Figures 6-8 As shown, the first light source assembly 111 includes a first light-emitting surface 1111, which is disposed opposite to the first light-transmitting hole 121 on the outside of the base frame 12; the second light source assembly 112 includes a second light-emitting surface 1121, which is disposed opposite to the second light-transmitting hole 122 on the outside of the base frame 12; the third light source assembly 113 includes a third light-emitting surface 1131, which is disposed opposite to the third light-transmitting hole 123 below the base frame 12; and the lens portion 2 is disposed opposite to the light-emitting hole 124 above the base frame 12.

[0094] One side of the base frame 12 is a mounting side 125, and the piezoelectric actuator 32 of the motor 3 is located on the mounting side 125. The mounting side 125 is located between the sides where the first light-transmitting hole 121 and the second light-transmitting hole 122 are located.

[0095] like Figure 6As shown, the first light source assembly 111 also includes a first control chip 1112 and a first circuit board 1113 that conductively connects the first control chip 1112 and the first light-emitting surface 1111. The first circuit board 1113 is connected to the side of the first light-emitting surface 1111 near the mounting side 125 and extends to the outside of the mounting side 125, and then extends from the side of the mounting side 125 near the bottom surface to the bottom of the third light-emitting surface 1131 and connects to the first control chip 1112.

[0096] like Figure 7 As shown, the second light source assembly 112 includes a second control chip 1122 and a second circuit board 1123 that conductively connects the second control chip 1122 and the second light-emitting surface 1121. The second circuit board 1123 is connected to the side of the second light-emitting surface 1121 near the mounting side 125 and extends to the outside of the mounting side 125, and then extends from the side of the mounting side 125 near the bottom surface to the bottom of the third light-emitting surface 1131 and connects to the second control chip 1122.

[0097] like Figure 8 As shown, the third light source assembly 113 includes a third control chip 1132 and a third circuit board 1133 that conductively connects the third control chip 1132 and the third light-emitting surface 1131. The third control chip 1132 is disposed below the third light-emitting surface 1131. The third circuit board 1133 is connected to the side of the third light-emitting surface 1131 near the mounting side 125, extends to the outer side of the bottom of the mounting side 125, and then folds back to connect with the third control chip 1132.

[0098] like Figure 3 As shown, the motor 3 includes a motor circuit board 34, which is disposed on the mounting side 125 of the base frame 12. The motor circuit board 34 is electrically connected to the piezoelectric actuator 32, and is also electrically connected to the first circuit board 1113, the second circuit board 1123, and the third circuit board 1133, respectively. In other words, the reason why the first circuit board 1113, the second circuit board 1123, and the third circuit board 1133 extend to the outside of the mounting side 125 is mainly to facilitate connection with the motor circuit board 34.

[0099] Furthermore, the motor circuit board 34 has a first side 3411 near the first light-emitting surface 1111, a second side 3412 near the second light-emitting surface 1121, and a third side 3413 near the third light-emitting surface 1131. The first side 3411 of the motor circuit board 34 is electrically connected to the first pin 1114 on the first circuit board 1113, the second side 3412 is electrically connected to the second pin 1124 on the second circuit board 1123, and the third side 3413 is electrically connected to the third pin 1134 on the third circuit board 1133.

[0100] It is worth mentioning that the first circuit board 1113, the second circuit board 1123, and the third circuit board 1133 are rigid-flex circuit boards. These boards include flexible and rigid portions. The flexible portion allows the circuit board to be bent at least twice, optimizing the space occupied by the circuit board. The rigid portion is suitable for assembling chips, motors, etc. Specifically, after bending, the first circuit board 1113 and the second circuit board 1123 allow the motor 3 to be placed inside the overlap between them. After bending, the third circuit board 1133 is folded between the base frame 12 and the second control chip 1122 and the first control chip 1112, thereby minimizing the volume of each circuit board and making the overall structure of the optomechanical module more compact, reducing the overall size of the optomechanical module.

[0101] The first control chip 1112 and the second control chip 1122 are arranged side by side below the third control chip 1132, and the sum of the cross-sectional areas of the first control chip 1112 and the second control chip 1122 is basically equivalent to the cross-sectional area of ​​the third control chip 1132, thereby reducing space waste.

[0102] like Figure 9 and Figure 10 As shown, the lens section 2 includes a lens barrel 21 and a lens assembly 22 disposed within the lens barrel 21. The lens section 2 also includes a carrier 23, which is disposed on the periphery of the lens barrel 21 near the fixing part 1. The lens section 2 is movably connected to the fixing part 1 through the carrier 23.

[0103] In some embodiments, the carrier 23 and the lens barrel 21 are integrally formed, which helps to reduce the overall volume of the lens section 2.

[0104] In some embodiments, the lens barrel 21 is cylindrical, and the carrier 23 has a first cut edge 231, a second cut edge 232, a third cut edge 233 and a fourth cut edge 234 to adapt to the square shape of the base frame 12 of the fixing part 1. The four cut edges are parallel to the four sides of the top surface of the base frame 12, and each cut edge is a rounded transition, thereby reducing the lateral and longitudinal dimensions of the carrier 23 and reducing the overall volume of the lens part 2.

[0105] In some embodiments, the first cut edge 231 of the carrier 23 is adjacent to the mounting side 125 of the base frame 12. The first cut edge 231 of the carrier 23 extends circumferentially to form a mover connection portion 235. A connection groove 2350 is formed on the mover connection portion 235. The connection end 332 of the mover 33 of the motor 3 extends into the connection groove 2350 and connects with the mover connection portion 235, so that the mover 33 is suitable for driving the entire lens part 2 to move.

[0106] In some embodiments, the second cleaved edge 232 and the fourth cleaved edge 234 are opposite each other, with the length of the second cleaved edge 232 being the same as the length of the fourth cleaved edge 234. The first cleaved edge 231 and the third cleaved edge 233 are opposite each other, with the length of the third cleaved edge 233 being greater than the length of the first cleaved edge 231. It should be understood that since the first cleaved edge 231 of the carrier 23 extends peripherally to form a mover connection portion 235, it will cause a change in the mass of the lens portion 2. For example, it will cause a shift in the center of mass of the lens portion 2, and the center of mass of the lens portion 2 will not be consistent with the optical axis. Moreover, the way the piezoelectric actuator 32 drives the mover 33 may result in poor drive line core alignment of the lens portion 2. Therefore, by setting the second cleaved edge 232 and the fourth cleaved edge 234 of the carrier 23 to be opposite each other, it is possible to ensure that the center of mass of the second cleaved edge 232 and the fourth cleaved edge 234 is consistent with the centerline of the lens portion 2. When the length of the first cut edge 231 is greater than the length of the third cut edge 233, it means that the mass on one side of the third cut edge 233 is larger. Since the first cut edge 231 extends to the periphery to form a moving part connecting part 235, by using the moving part connecting part 235 to increase the weight on one side of the first cut edge 231, the mass on both sides of the lens part 2 can be basically balanced, thereby improving the driving linearity of the optical engine module.

[0107] In some embodiments, the lens assembly 22 includes at least one chamfered lens with two opposing straight edges. The first chamfered edge 231 of the carrier 23 is opposite to one of the straight edges of the chamfered lens, and the third chamfered edge 233 is opposite to the other straight edge of the chamfered lens, which maximizes the reduction in size of the lens portion 2. It is worth mentioning that since each chamfered edge of the carrier 23 is a plane, and the moving part 235 formed on the first chamfered edge 231 is also generally linearly extended, and the lens is roughly rotationally symmetrical, the injection molding of the lens needs to be relatively uniform to prevent optical defects caused by uneven local injection molding, such as issues with the lens's roundness, astigmatism, and surface fit.

[0108] In some embodiments, the connecting end 332 can be connected to the moving part connecting portion 235 in various ways. In one embodiment, adhesive is provided in the connecting groove 2350 to connect the connecting end 332 of the moving part 33. The adhesive can fill the tiny gap between the connecting groove 2350 and the connecting end 332 of the moving part 33, forming a uniform and continuous adhesive layer, thereby significantly improving the connection strength and stability between the two.

[0109] In another embodiment, the carrier 23 and the mover 33 are integrally molded, so that when the lens part 2 is assembled into the motor 3, no additional structural parts need to be set to connect with the mover 33, thereby reducing the size of the optical engine module.

[0110] Furthermore, such as Figure 10 and Figure 11As shown, there is a gap between the connecting end 332 and the inner wall of the connecting groove 2350, so as to allow a certain amount of adjustment space between the lens part 2 and the moving part 33 when connecting them.

[0111] The connecting groove 2350 includes a first side surface 2351, a second side surface 2352 and a bottom surface 2353. The gap between the connecting end 332 of the mover 33 and the first side surface 2351 and the second side surface 2352 of the connecting groove 2350 is denoted as L1, where L1 > 100 μm. This allows the lens section 2 to have a certain adjustment margin for adjusting the optical axis and center of mass of the lens section 2.

[0112] The gap between the connecting end 332 of the mover 33 and the bottom surface 2353 of the connecting groove 2350 is denoted as L2. The length of the base frame 12 in the fixing part 1 along the direction parallel to the first cutting edge 231 is denoted as L. 0.01 < L1 / L < 0.05; 0.01 < L2 / L < 0.05, so that the lens part 2 can be assembled in an adjustable manner and has an adjustment capability of about 1° to compensate for the relative accuracy between the motor 3 and the lens part 2. For example, the center line of the mover 33 can be adjusted to align with the center line of the lens part 2.

[0113] Furthermore, the motor 3 includes a motor housing 31, which is mounted on the base frame 12.

[0114] like Figure 9 and Figure 12 As shown, the motor housing 31 includes a first housing body 311 disposed on the mounting side 125 of the base frame 12 and a first cover 312 disposed on the first housing body 311. A first receiving cavity 313 is defined between the first housing body 311 and the first cover 312. The drive end 331 of the piezoelectric actuator 32 and the mover 33 is located in the first receiving cavity 313. The first receiving cavity 313 has a first opening 3130 on the side near the lens portion 2, so that the mover 33 extends into the lens portion 2 through the first opening 3130.

[0115] Specifically, the first shell body 311 has a first sidewall 3111 and a third sidewall 3113 extending along the optical axis. The first sidewall 3111 and the third sidewall 3113 are opposite to each other, and a first opening 3130 of the first receiving cavity 313 is formed between the first sidewall 3111, the third sidewall 3113 and the first cover 312.

[0116] like Figure 3 and Figure 12As shown, the motor housing 31 also includes a second housing body 314 disposed on the top surface of the base frame 12 and a second cover 315 disposed on the second housing body 314. A second receiving cavity 316 is defined between the second housing body 314 and the second cover 315, and the carrier 23 of the lens part 2 is movably disposed in the second receiving cavity 316. The connecting end 332 of the mover 33 and the mover connecting part 235 of the carrier 23 are both located in the second receiving cavity 316. The side of the second housing body 314 near the mounting side 125 extends outward to the first cover 312. A second opening 3160 is formed at the position of the second housing body 314 opposite to the first opening 3130 of the first receiving cavity 313. The mover 33 extends into the second receiving cavity 316 through the second opening 3160. The first housing body 311 is located below the second cover 315. The upper end of the first cover 312 extends to the inside of the second cover 315, that is, the upper end of the first cover 312 is located in the second receiving cavity 316, and the first cover 312 is received in the second receiving cavity 316. Thus, the second housing body 314 can protect the carrier 23 of the lens part 2 and the components in the first receiving cavity 313.

[0117] In some embodiments, the motor circuit board 34 has an external connection portion 341, a piezoelectric connection portion 342, and a flexible connection portion 343. The piezoelectric connection portion 342 is connected to the piezoelectric actuator 32. One end of the flexible connection portion 343 is connected to the piezoelectric connection portion 342, and the other end is folded outward and connected to the external connection portion 341. The external connection portion 341 is U-shaped and disposed between the first housing body 311 and the first cover body 312. Preferably, each side wall of the first housing body 311 is folded outward at one end near the first cover 312 to form a supporting plane. An external connection portion 341 is disposed on this supporting plane, and the external connection portion 341 has a first side 3411 electrically connected to a first pin 1114 on the first circuit board 1113, a second side 3412 electrically connected to a second pin 1124 on the second circuit board 1123, and a third side 3413 electrically connected to a third pin 1134 on the third circuit board 1133. This allows for conductive connection between the motor 3 and the external light-emitting component 11 via the motor circuit board 34. Notably, the motor circuit board 34 can be bent and assembled into the first housing body 311 via a flexible connection portion 343, making the motor 3 more compactly installed and thus achieving miniaturization of the optomechanical module.

[0118] In some embodiments, the first housing body 311 further has a second sidewall 3112 connecting the first sidewall 3111 and the third sidewall 3113. The first sidewall 3111, the second sidewall 3112, and the third sidewall 3113 are all folded outward to support the U-shaped external connection portion 341 of the motor circuit board 34. It is worth mentioning that after the first sidewall 3111 and the third sidewall 3113 of the first housing body 311 are bent outward, the first sidewall 3111 and the third sidewall 3113 always have an elastic force that presses the piezoelectric actuator 32 into the first housing body 311, so that the piezoelectric actuator 32 can always be pressed on the mover 33, thereby improving the linearity of the movement of the piezoelectric actuator 32.

[0119] In some embodiments, the first cover 312 is flat and has a first end 3121 and a second end 3122 that is wider than the first end 3121. It should be understood that the larger second end 3122 helps to fix the motor circuit board 34 to the first housing body 311 and provides protection for the components installed in the motor 3. The narrower first end 3121 can further achieve the function of avoiding or reducing the overall structure of the motor 3 and reducing the overall size of the optomechanical module.

[0120] In some embodiments, such as Figure 13 As shown, the first cover 312 has a slot 3123 on the side facing the first housing body 311. The slot 3123 forms a clearance space suitable for accommodating movers 33 of different sizes. Even if a larger mover 33 is placed under the first cover 312 to increase driving force, the movement of the mover 33 is not affected. In addition, the presence of the slot 3123 allows the mover 33 to move without using the first cover 312 as a stop. A stop component is provided at the bottom of the mover 33, which allows the stop component of the drive end 331 of the mover 33 to be located on the second side wall 3112 of the first housing body 311. This makes the size of the motor 3 more compact and can reduce the size of the optomechanical module.

[0121] In some embodiments, such as Figure 14 As shown, the motor 3 includes two piezoelectric actuators 32, which are respectively disposed on both sides of the drive end 331 of the mover 33. This provides a more balanced driving force, reduces imbalance and vibration caused by unilateral drive, and thus improves the stability and reliability of the drive. The two piezoelectric actuators 32 are respectively pressed onto both sides of the mover 33 by a clamping member 35, ensuring good contact between the piezoelectric actuators 32 and the mover 33, reducing failures caused by poor contact or loosening, and improving the overall reliability of the system.

[0122] In some embodiments, such as Figure 12 , 15As shown, the clamping component 35 includes an elastic part 351, a first clamping part 352, and a second clamping part 353. The elastic part 351 is disposed above the mover 33. The first clamping part 352 and the second clamping part 353 respectively abut against the piezoelectric actuators 32 on both sides of the mover 33. It should be understood that the elastic part 351 ensures that the first clamping part 352 and the second clamping part 353 always maintain an inward clamping force on the piezoelectric actuator 32, thereby ensuring good contact between the piezoelectric actuator 32 and the mover 33.

[0123] In some embodiments, the clamping member 35 is an integral structure, formed by bending a metal sheet to form an elastic part 351, a first clamping part 352, and a second clamping part 353.

[0124] In some embodiments, the elastic portion 351 has a first extending surface 3521 and a second extending surface 3531 connected to each other. The other end of the first extending surface 3521 is connected to the first clamping portion 352, and the other end of the second extending surface 3531 is connected to the second clamping portion 353. The included angle between the first extending surface 3521 and the second extending surface 3531 is α, where α ≤ 180°, preferably α < 180°. It should be understood that when the included angle between the first extending surface 3521 and the second extending surface 3531 is an acute angle, more space can be reserved for accommodating the mover 33. At the same time, the clamping force of the first clamping portion 352 and the second clamping portion 353 will also increase, so that the clamping member 35 can more firmly abut against the piezoelectric actuators 32 on both sides of the mover 33, ensuring good contact between the piezoelectric actuators 32 and the mover 33.

[0125] In some embodiments, the first extension surface 3521 has a first opening 3520, and the second extension surface 3531 has a second opening 3530. The first opening 3520 is located near the first clamping part 352, and the second opening 3530 is located near the second clamping part 353. This can ensure that the two sides of the clamping member 35 can be bent more easily, or that the processing accuracy of the clamping member 35 can be ensured when the first clamping part 352 and the second clamping part 353 are formed by stamping.

[0126] Specifically, the flexible connection portion 343 of the motor circuit board 34 is adapted to pass through the first port 3520 and the second port 3530 to connect the piezoelectric actuators 32 on both sides of the mover 33. Then, the first clamping portion 352 and the second clamping portion 353 are clamped on the flexible connection portion 343 respectively. Thus, the first clamping portion 352 and the second clamping portion 353 will not affect the electrical connection between the flexible connection portion 343 and the piezoelectric actuator 32, and can make good contact between the mover 33, the piezoelectric actuator 32 and the flexible connection portion 343, reducing failures caused by poor contact or loosening, and improving the overall reliability of the system.

[0127] In some embodiments, the first clamping portion 352 has an inwardly bent first abutment end 3522, and the second clamping portion 353 has an inwardly bent second abutment end 3532. The bent first abutment end 3522 and second abutment end 3532 form a structure surrounding the piezoelectric actuator 32, thereby firmly fixing the piezoelectric actuator 32 to the mover 33 and preventing displacement or vibration during operation. It should be understood that due to the deformation of the piezoelectric actuator 32, the outer side of the first housing body 311 will also deform accordingly. To ensure the piezoelectric actuator 32 can operate normally, the first housing body 311 needs a certain amount of deformation space. When the piezoelectric actuator 32 is working, the first abutment end 3522 and the second abutment end 3532 will deform. This deformation can continuously provide support for the piezoelectric actuator 32 to ensure its stable operation, while also adapting to the deformation requirements of the outer side of the first housing body 311. Specifically, the first housing body 311 can provide a pre-pressure in the bottom direction (along the optical axis direction) for the piezoelectric actuator 32, and the clamping member 35 can provide a pre-pressure in the side direction (perpendicular to the optical axis direction) for the piezoelectric actuator 32.

[0128] In some embodiments, such as Figure 12 As shown, the piezoelectric actuator 32 is a resonant oscillator, comprising an elongated piezoelectric body 321 and a semi-circular friction head 322. The planar end of the friction head 322 is connected to the piezoelectric body 321, and the arc-shaped end abuts against the mover 33. When the piezoelectric body 321 is energized and deformed, it squeezes the friction head 322, causing it to produce elliptical motion, which in turn drives the mover 33 to move relative to the piezoelectric body 321, ultimately displacing the lens part 2 relative to the fixed part 1.

[0129] In some embodiments, the resonator is perpendicular to the mounting side 125 of the base frame 12 and is mounted between the bottom wall of the first housing body 311 and the mover 33. However, compared to the arrangement where the resonator is parallel to the mounting side 125 of the base frame 12 and is located between the side wall of the first housing body 311 and the mover 33, this arrangement increases the thickness of the motor 3, which is not conducive to achieving miniaturization of the optomechanical module.

[0130] Furthermore, such as Figure 3 As shown, the mover 33 is disposed on the central plane 200 of the lens section 2, and the center of mass of the mover 33 is also disposed on the central plane 200. The central plane 200 refers to a plane that is parallel to and coincides with the optical axis of the lens section 2. The extension direction and the movement direction of the mover 33 are both parallel to the optical axis or the central plane 200. This method enables the driving force of the friction head 322 to be applied precisely on the centerline passing through the center of mass when the friction head 322 is driven, which enables the mover 33 to have high linearity during movement, and thus the optical engine module has high linearity of movement.

[0131] It is worth mentioning that the piezoelectric actuators 32 are arranged on both sides of the mover 33 and are symmetrically arranged relative to the mover 33. This allows the driving force generated by the two piezoelectric actuators 32 to act on the mover 33 together, enabling the mover 33 to generate a step distance of ×2 under the drive of the piezoelectric actuators 32. This doubles the step distance of the mover 33 and doubles the driving speed of the mover 33.

[0132] In one driving method, two piezoelectric actuators 32 are driven differentially. The piezoelectric actuators 32 can alternately drive the mover 33. This sequential method can double the driving speed. For example, the first piezoelectric actuator 32 drives within the first 50% of a cycle, and the second piezoelectric actuator 32 drives within the last 50% of a cycle, which enables the piezoelectric actuators 32 to drive in a sequential manner.

[0133] In another driving method, the two piezoelectric actuators 32 are driven with the same cycle, which allows the driving of the piezoelectric actuators 32 to be superimposed, so that the driving speed of the motor 3 remains unchanged, but the driveable load of the motor 3 is doubled. This method allows the motor 3 to drive a larger weight.

[0134] It is understandable that in an optical engine module, when the size and weight of the lens section 2 are large, the required driving force of the motor 3 is greater, which leads to a decrease in driving accuracy. However, in the solution provided in this application, the two piezoelectric elements 321 are driven with the same cycle, which increases the driving force while better ensuring driving accuracy.

[0135] In some embodiments, such as Figure 9 As shown, the lens portion 2 is movably connected to the fixing portion 1 via at least one guide structure 4, and the guide structure 4 is located within the second receiving cavity 316. The guide structure 4 includes a first guide member 41 and a second guide member 42, the first guide member 41 being disposed on the fixing portion 1 and the second guide member 42 being disposed on the lens portion 2. In some embodiments, the first guide member 41 and the second guide member 42 may be a guide rod and a matching slide groove, respectively; of course, the first guide member 41 and the second guide member 42 may also take other forms.

[0136] In some embodiments, the lens part 2 and the fixing part 1 are movably connected by at least two guide structures 4. By providing multiple guide structures 4, it is beneficial to improve the connection stability.

[0137] exist Figure 9In the illustrated embodiment, the lens section 2 and the fixing section 1 are movably connected by two guide structures 4. The two guide structures 4 are located diagonally opposite each other. Specifically, two second guide members 42 are provided on the carrier 23, and the two second guide members 42 are located diagonally opposite each other on the carrier 23; two first guide members 41 are provided on the fixing section 1, and the two first guide members 41 are located diagonally opposite each other on the carrier 23. The line connecting the two first guide members 41 or the two second guide members 42 passes through the optical axis of the lens section 2, so that when the guide structure 4 guides the lens section 2 to move, the nonlinear torque or overturning of the mover 33 on the lens section 2 is small, making the movement of the lens section 2 more stable.

[0138] In some embodiments, the first guide member 41 may be fixedly mounted on the base frame 12 or fixedly mounted on the second cover 315 of the motor 3. Specifically, the second cover 315 has a guide hole for mounting the first guide member 41, and the first guide member 41 is fixed in the guide hole on the second cover 315. Because the surface of the second cover 315 has a high degree of flatness, the high flatness of the second cover 315 can improve the linearity of the motor 3's movement by fixing the first guide member 41 thereto.

[0139] The second guide member 42 is disposed on the carrier 23 and is formed at the arc transition between adjacent cut edges of the carrier 23. Specifically, the first guide member 41 is a guide rod, and the second guide member 42 forms a guide groove that matches the guide rod. Alternatively, the first guide member 41 is a ball bearing, and the second guide member 42 forms a guide groove that matches the ball bearing. Alternatively, the first guide member 41 includes both a guide rod and a ball bearing, and the second guide member 42 forms a guide groove that matches both the guide rod and the ball bearing. During the assembly of the lens part 2, the guide rod is first used for precision assembly, and then the arrangement of several ball bearings allows for appropriate adjustments, thereby making the assembly of the lens part 2 more accurate.

[0140] In some embodiments, the optomechanical module includes at least one temperature sensing component 5, which is disposed on the side of the carrier 23 of the lens section 2, and / or on one side of each light-emitting surface in the light-emitting component 11, for detecting the temperature of the lens section 2 and / or each light-emitting surface in the light-emitting component 11.

[0141] In some embodiments, the temperature sensing component 5 is disposed in the middle region between the two end faces of the lens portion 2. Therefore, the temperature sensing component 5 can reflect the approximate temperature of the lens portion 2, and in practical testing, the temperature sensing component 5 can accurately reflect the overall temperature of the lens portion 2. Preferably, the temperature sensing component 5 is disposed at half the length between the two end faces of the lens portion 2.

[0142] In some embodiments, the temperature sensing component 5 includes a first temperature sensor 51 and a second temperature sensor 52, such as Figure 16As shown, the first temperature sensor 51 is disposed on the side of the carrier 23 to sense and transmit the temperature changes of each light source chip in the light-emitting component 11. The second temperature sensor 52 is disposed on the side of the lens barrel 21 to sense and transmit the temperature changes of the lens section 2. That is, the first temperature sensor 51 is closer to the light-emitting component 11 than the second temperature sensor 52. It should be understood that since the temperature of the lens group 22 is the direct factor determining the focal length drift of the lens section 2, placing the second temperature sensor 52 on one side of the lens barrel 21, closest to the lens group 22, minimizes the error and makes the temperature measurement data of the lens section 2 most accurate. Due to the integrated design of the lens section 2 and the motor 3, heat conduction is fast, and temperature changes can be transmitted to the temperature sensing component 5 in 1-2 seconds. The motor 3 or the piezoelectric actuator 32 can immediately perform micron-level compensation to prevent focus drift. In addition, the temperature sensing component 5 is directly attached to the side of the lens section 2 without taking up additional height, which matches the concept of "integrated lens section 2 and motor 3", and the overall thickness is not increased, saving overall space.

[0143] In some embodiments, such as Figure 17 As shown, the first temperature sensor 51 is respectively disposed on one side of the first light-emitting surface 1111, the second light-emitting surface 1121, and the third light-emitting surface 1131, and is used to sense and transmit the temperature changes of each light-emitting surface. The second temperature sensor 52 is disposed on the side of the lens barrel 21 and is used to sense and transmit the temperature changes of the lens section 2. Specifically, the three light source chips represent three heat sources, and the light source chips can be regarded as the radiation source of the heat source. After the first light-emitting surface 1111, the second light-emitting surface 1121 and the third light-emitting surface 1131 are working, since the first light-emitting surface 1111 is attached to the first light-transmitting hole 121 of the base frame 12, the second light-emitting surface 1121 is attached to the second light-transmitting hole 122 of the base frame 12, and the third light-emitting surface 1131 is attached to the third light-transmitting hole 123 of the base frame 12, and the first light-emitting surface 1111 and the third light-emitting surface 1131 are arranged opposite to each other, the heat generated by the two is spread to the lens part 2 more evenly, so that the temperature rise of the lens part 2 is more gradual, and the temperature of the lens part 2 is more evenly heated by the heat generated by the first light-emitting surface 1111 and the third light-emitting surface 1131.

[0144] Understandably, since the heat mainly comes from the light-emitting surfaces, in order to eliminate the influence of other components, such as the heat generated by other elements—antennas, microphones, or the thermal influence of ambient temperature on the lens 2, thus affecting the local temperature of the lens 2, the first temperature sensor 51 is placed on one side close to each light-emitting surface, and the second temperature sensor 52 is placed in the middle of the lens 2. This allows for differential measurement, for example, by adding the temperature detected by the second temperature sensor 52 to the temperature detected by the first temperature sensor 51 to calculate the average value, thus obtaining the overall temperature of the lens 2. This method can eliminate the problem that the overall temperature of the lens 2 cannot be accurately measured due to external factors causing local temperature increases in the lens 2.

[0145] like Figure 18 As shown, the lens section 2 is designed such that its temperature drift is linearly related to the ambient temperature. Therefore, the back focus shift of the lens section 2 can be determined based on its temperature. In this application, the back focus of the light at 0 field of view of the lens section 2 is set to have a linear relationship between temperature drift and ambient temperature. Combined with the temperature sensing component 5, compensation for temperature drift can be achieved. Overall, the relationship between the back focus of the lens section 2 and temperature drift can be fitted as a curve with a slope of approximately 0.132 within the range of 0-55℃. In other words, the lens section 2 is designed such that its temperature drift is monotonically related to the ambient temperature within the range of 0-55℃. Therefore, the temperature drift of the lens section 2 can be characterized by temperature detection using the temperature sensing component 5.

[0146] In one specific embodiment, the optomechanical module of this application adopts a combination design of one glass lens and three plastic lenses. Testing showed that the various indicators of the optomechanical module in this embodiment meet the imaging requirements, representing a low-cost, high-mass-production-ready glass-plastic hybrid solution. Figure 19 The figures shown are the performance parameters of the optomechanical module of this application, including pixel size, pixel dimensions, relative illumination, etc. Figure 20 The diagram shown is a schematic representation of the optical path between the lens group 22 and the prism assembly 13 within the optomechanical module of this application; Figure 21 The figure shown is the MTF curve of the optical-mechanical module of this application; as shown Figure 22 The diagram shown illustrates the Astigmatic Field Curves and Distortions of the optomechanical module in this application. Figure 23 The diagram shown is a schematic of the relative illumination of the optomechanical module in this application.

[0147] Furthermore, such as Figure 24As shown, the hardware solution adopted in this application is as follows: Step S1: Thermistor, whose resistance value changes significantly and regularly with temperature. By measuring the resistance value and performing corresponding conversion calculations, the temperature of the environment or object can be accurately determined. Step S2: OPA (Operational Amplifier), amplifies the input signal of the thermistor. Step S3: ADC (Analog-to-Digital Converter), converts the analog input signal of the OPA into a digital signal. Step S4: MCU (Microcontroller Unit), reads the ADC, and controls the motor drive. Step S5: Motor drive, drives the operation of motor 3, and controls motor 3 to move to the correct position. Step S6: Motor 3, converts electrical energy into mechanical energy, providing power to achieve precise distance movement. Adjust the back focus so that the image is focused on the waveguide.

[0148] Furthermore, such as Figure 25 As shown, the software solution adopted in this application is as follows: the AR glasses optical engine system includes a temperature sensor module, a data preprocessing module, a thermal expansion prediction module, and a piezoelectric controller algorithm module. Based on the data results reflected by each module, a control signal is output. The piezoelectric element 321 can adjust the position of the lens part 2 according to the control signal, and additional manual fine adjustment makes the image display of the AR glasses optical engine system clear.

[0149] Furthermore, another software solution adopted in this application is as follows: Step S10: Temperature-focal length offset modeling: (1) Data acquisition: Through experiments, different temperatures (T) are simulated using a temperature control box, and the deformation (L) of the corresponding piezoelectric controller at different temperatures is measured, and a calibration data table is constructed on this basis. (2) Model fitting: The relationship between temperature and piezoelectric deformation (L) is fitted using a piecewise linear model or a polynomial: L=F(T)=a·T+b·T2+c. (3) Parameter storage: The model parameters or lookup table (LUT) are stored in the Flash of the MCU to reduce the amount of real-time calculation.

[0150] Step S20: Real-time temperature monitoring and prediction: (1) Multi-sensor fusion: Deploy temperature sensors 18 at key locations in the optomechanical system and weighted fuse multiple data streams to improve accuracy. (2) Temperature change rate detection: Calculate the temperature gradient dT / dt, predict short-term temperature change trends, and trigger compensation in advance.

[0151] Step S30: Execution layer: (1) Piezoelectric actuator + drive circuit: Piezoelectric actuator: Adjust the piezoelectric actuator and adjust the lens through micro-displacement to compensate for thermal deformation. Drive circuit: Design high and low voltage ripple drive circuits to avoid resonance of the piezoelectric actuator. (2) Control algorithm: Hybrid prediction model: Combine the physical thermal expansion equation with the AI ​​time-series prediction model to predict deformation. Adaptive control algorithm: Dynamically switch between PID and sliding mode control strategies to cope with different temperature change scenarios.

[0152] Step S40: Core algorithm implementation: (1) Temperature field modeling and deformation prediction: 3D heat conduction modeling, LSTM time series prediction. (2) Piezoelectric hysteresis nonlinear compensation: Preisach inverse model, creep compensation. (3) Multimodal control strategy switching: steady-state control, rapid temperature change.

[0153] Step S50: Low power optimization: (1) Event-driven: Compensation is triggered only when the temperature change exceeds the threshold or time window. (2) Sleep mode: The MCU enters low power mode when the temperature is stable and is woken up by a hardware interrupt.

[0154] Compared to electromagnetically driven solutions, the temperature drift of the lens section 2 in the optomechanical module of this application is on the order of μm. This application employs at least one piezoelectric element 321 for rapid switching, which improves the response speed and accuracy of the virtual image distance of the optomechanical module. Furthermore, the piezoelectric element 321 enables power-off self-locking, maintaining a constant distance between the lens section 2 and the prism assembly 13 after locking. This eliminates the need for an additional locking structure within the optomechanical module, facilitating its miniaturization. Simultaneously, the optomechanical module does not require continuous power supply and consumes no additional power after power failure, thus extending its runtime.

[0155] Furthermore, in the prior art, most optical engine modules do not allow for changes in the distance between the lens and optical components. While this makes assembly more convenient, in reality, the light-emitting component 11 generates heat during operation. This heat accumulation causes deformation of the lens elements, which ultimately affects the focal length of the lens and thus the performance of the projected image. Since the distance of the projected image from the lens to the user directly affects the user's viewing experience, the distance of the projected image from the lens in the optical engine module of this application can be adjusted by using the piezoelectric actuator 32 when the lens temperature changes, thereby ensuring the user's viewing experience.

[0156] Furthermore, the optical engine module of this application reduces the impact of temperature on the focal length of the lens by moving the lens section 2, which can ensure the user's viewing experience and thus enhance the user's immersion in the optical engine module.

[0157] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An optomechanical module, characterized in that, include: The fixing part includes an image light generation module adapted to emit image light; The lens section is used to project the image light. The lens section includes a lens barrel, a lens group disposed inside the lens barrel, and a carrier. The carrier is disposed on the periphery of the lens barrel near the fixed part. The lens section is movably connected to the fixed part. A motor, adapted to drive the lens portion to move relative to the fixed portion, the motor including at least one piezoelectric actuator and a mover, the piezoelectric actuator being disposed on the fixed portion, the connecting end of the mover being connected to the lens portion, the driving end of the mover being coupled to the piezoelectric actuator, the piezoelectric actuator being adapted to drive the mover to move in a direction parallel to the optical axis, thereby causing the lens portion to move relative to the fixed portion; the fixed portion including a base frame, the image light generation module including a light-emitting component and a prism component, the prism component being disposed inside the base frame, the light-emitting component being disposed outside the base frame, the base frame having a top surface and a bottom surface perpendicular to the optical axis and four sides surrounding the periphery, the lens portion being disposed on the top surface of the base frame, one side of the base frame being a mounting side, and the piezoelectric actuator being disposed on the mounting side.

2. The optomechanical module according to claim 1, characterized in that, The light-emitting components include a first light source component, a second light source component, and a third light source component. The bottom surface of the base frame has a third light-transmitting hole. The base frame has a first light-transmitting hole and a second light-transmitting hole on two sides adjacent to the mounting side, respectively. The first light source component includes a first light-emitting surface opposite to the first light-transmitting hole and a first control chip disposed below the bottom surface of the base frame. The second light source component includes a second light-emitting surface opposite to the second light-transmitting hole and a second control chip disposed below the bottom surface of the base frame. The third light source component includes a third light-emitting surface opposite to the third light-transmitting hole and a third control chip disposed between the third light-emitting surface and the first and second control chips.

3. The optomechanical module according to claim 2, characterized in that, The motor also includes a motor circuit board disposed on the mounting side; The first light source assembly further includes a first circuit board that conductively connects the first control chip and the first light-emitting surface. The first circuit board is connected to the side of the first light-emitting surface near the mounting side and extends to the outside of the mounting side to be conductively connected to the motor circuit board. Then, it extends from the side of the mounting side near the bottom surface of the base frame to the bottom surface of the base frame to be connected to the first control chip. The second light source assembly includes a second circuit board that conductively connects the second control chip and the second light-emitting surface. The second circuit board is connected to the side of the second light-emitting surface near the mounting side and extends to the outside of the mounting side to be conductively connected to the motor circuit board. Then, it extends from the side of the mounting side near the bottom surface of the base frame to the bottom surface of the base frame to be connected to the second control chip. The third light source assembly includes a third circuit board that conductively connects the third control chip and the third light-emitting surface. The third circuit board is connected to the side of the third light-emitting surface near the mounting side, extends to the outside of the mounting side and is conductively connected to the motor circuit board, and then returns to the bottom surface of the base frame and is connected to the third control chip.

4. The optomechanical module according to claim 3, characterized in that, The portions of the first circuit board and the second circuit board opposite to the mounting side are stacked.

5. The optomechanical module according to claim 1, characterized in that, The motor includes a motor housing mounted on the base frame. The motor housing includes a first housing body disposed on the mounting side and a first cover disposed on the first housing body. A first receiving cavity is defined between the first housing body and the first cover. The piezoelectric actuator and the drive end of the mover are located in the first receiving cavity. The first receiving cavity has a first opening on the side near the lens portion, and the mover extends through the first opening to the lens portion.

6. The optomechanical module according to claim 5, characterized in that, The motor also includes a motor circuit board disposed in the first receiving cavity, one end of which is electrically connected to the piezoelectric actuator, and the motor circuit board extends outside the first receiving cavity and is electrically connected to the light-emitting component.

7. The optomechanical module according to claim 6, characterized in that, The motor includes two piezoelectric actuators, which are respectively disposed on both sides of the drive end of the mover; the motor also includes a clamping component, which includes an elastic part, a first clamping part, and a second clamping part. The first clamping part and the second clamping part abut against the piezoelectric actuators respectively, and the elastic part causes the first clamping part and the second clamping part to always maintain an inward clamping force on the piezoelectric actuators.

8. The optomechanical module according to claim 7, characterized in that, The elastic part is disposed above the moving part, and the elastic part has a first extension surface and a second extension surface that are connected to each other. The included angle between the first extension surface and the second extension surface is α, where α ≤ 180°.

9. The optomechanical module according to claim 8, characterized in that, The angle between the first extension surface and the second extension surface is α, where α < 180°.

10. The optomechanical module according to claim 8, characterized in that, The first extension surface has a first port, and the second extension surface has a second port. The motor circuit board is adapted to connect the piezoelectric actuators on both sides of the mover through the first port and the second port.

11. The optomechanical module according to claim 10, characterized in that, The first clamping part has an inwardly bent first abutting end, and the second clamping part has an inwardly bent second abutting end, the first abutting end and the second abutting end pressing against the piezoelectric actuator on both sides of the mover.

12. The optomechanical module according to claim 11, characterized in that, The piezoelectric actuator is a resonator, which includes a strip-shaped piezoelectric body and a semi-circular friction head. The flat end of the friction head is connected to the piezoelectric body, and the arc end is connected to the mover. The piezoelectric body is adapted to squeeze the friction head to drive the mover to rotate relative to the piezoelectric body.

13. The optomechanical module according to claim 5, characterized in that, The carrier is integrally formed with the lens barrel. The carrier has a first cut edge, a second cut edge, a third cut edge and a fourth cut edge. The four cut edges are parallel to the four sides of the top surface of the base frame, and each cut edge is connected by a rounded transition. The first cut edge is adjacent to the mounting side of the base frame. The first cut edge extends circumferentially to form a moving part connecting portion. A connecting groove is formed on the moving part connecting portion. The connecting end of the moving part extends into the connecting groove and connects with the moving part connecting portion.

14. The optomechanical module according to claim 13, characterized in that, The second cut edge and the fourth cut edge are opposite each other, and the length of the second cut edge is the same as the length of the fourth cut edge. The first cut edge and the third cut edge are opposite each other, and the length of the third cut edge is greater than the length of the first cut edge.

15. The optomechanical module according to claim 14, characterized in that, The connecting groove includes a first side surface, a second side surface, and a bottom surface. The gap between the moving part connecting end and the first side surface and the second side surface of the connecting groove is denoted as L1, where L1 > 100 μm. The gap between the moving part connecting end and the bottom surface of the connecting groove is denoted as L2. The length of the base frame along the direction parallel to the first tangent is denoted as L, where 0.01 < L1 / L < 0.05 and 0.01 < L2 / L < 0.

05.

16. The optomechanical module according to claim 13, characterized in that, The motor housing also includes a second shell body disposed on the top surface of the base frame and a second cover body disposed on the second shell body. A second receiving cavity is defined between the second shell body and the second cover body, and the carrier is movably disposed in the second receiving cavity. The first shell body is disposed below the second cover body, the upper end of the first cover body extends to the inner side of the second cover body, and the first cover body is received in the second receiving cavity.

17. The optomechanical module according to claim 16, characterized in that, The device includes a guide structure comprising a first guide member and a second guide member, the first guide member and the second guide member being located diagonally opposite each other on the carrier. Both the first guide member and the second guide member are guide rods, or the first guide member is a guide rod and the second guide member is a ball bearing. The guide structure is accommodated within a second receiving cavity.

18. The optomechanical module according to claim 2, characterized in that, It includes at least one temperature sensing component, which is disposed on the carrier side of the lens portion, and / or disposed on one side of the first control chip, the second control chip and the third control chip in the light-emitting component.

19. The optomechanical module according to claim 18, characterized in that, The temperature sensing component is disposed in the middle region between the end face of the lens portion near the object side and the end face near the base frame.

Images