Mounting and adjusting device and method for Micro-LED projection light machine

Abstract

The invention discloses an assembling and adjusting device and method for a Micro-LED projection light machine, and relates to the technical field of Micro-LED projection light machines. The device comprises an optical machine assembling and adjusting clamp, a pose adjusting table, a focusing ring and a CMOS camera assembly. The pose adjusting table can drive the Micro-LED projection light machine to move, so that the optical axis of the Micro-LED projection light machine and the axis of the CMOS camera assembly are located at the coaxial position. The CMOS camera assembly is used for shooting an image projected by the lens group; the focusing ring can drive the lens group to be screwed in or out relative to the base in a threaded mode so that the relative distance between the lens group and the Micro-LED display chip can be adjusted. According to the invention, the relative position of the display chip and the lens group can be accurately adjusted, so that the back focal length of the lens group accurately falls on the light-sensitive surface of the display chip, thereby ensuring that a projected image is clearly presented.

Description

Technical Field

[0001] This invention relates to the field of Micro-LED projection optical engine technology, and in particular to an assembly and adjustment device and method for a Micro-LED projection optical engine. Background Technology

[0002] Micro-LED projection optical engines are the core components of projection devices that use micro-light-emitting diodes (Micro-LEDs) as both the light source and image source. They typically integrate ultra-small LEDs (less than 100 micrometers) onto a silicon substrate, combined with CMOS control circuitry, to achieve self-emissive pixel imaging, eliminating the need for a backlight module. They offer advantages such as high brightness, high contrast, fast response time, and long lifespan, while also being compact, significantly optimizing the projection system structure.

[0003] The Micro-LED projection optical engine consists of a Micro-LED display chip, a display chip base, and a lens assembly. The image displayed by the Micro-LED display chip is projected onto a display screen or the next receiving surface of the optical system via the lens assembly. The Micro-LED display chip is fixed to the base with optical adhesive, and the lens assembly is connected to the base with threads. The relative position of the lens assembly and the display chip can be adjusted by adjusting the depth of the threads.

[0004] To ensure the projection quality of a Micro-LED projector, the relative positions of the display chip and lens assembly need to be precisely adjusted during the production and assembly process. This ensures that the back focus of the lens assembly falls precisely on the photosensitive surface of the display chip, thereby guaranteeing a clear projected image. This invention provides an assembly and adjustment device and method for a Micro-LED projector. Summary of the Invention

[0005] The purpose of this invention is to provide an assembly and adjustment device and method for a Micro-LED projection optical engine to solve the problems existing in the prior art. It can accurately adjust the relative position of the display chip and the lens group, so that the back focal length of the lens group falls precisely on the photosensitive surface of the display chip, thereby ensuring the clear presentation of the projected image.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides an assembly and adjustment device for a Micro-LED projection optical engine, comprising an optical engine assembly and adjustment fixture, a position adjustment stage, a focusing ring, and a CMOS camera assembly. The optical engine assembly and adjustment fixture is disposed on the position adjustment stage and is used to clamp and fix the base of the Micro-LED projection optical engine. The focusing ring is sleeved on the lens assembly of the Micro-LED projection optical engine. The lens of the CMOS camera assembly is disposed opposite to the lens assembly. The position adjustment stage can drive the Micro-LED projection optical engine to operate, so that the optical axis of the Micro-LED projection optical engine and the axis of the CMOS camera assembly are coaxial. The CMOS camera assembly is used to capture images projected by the lens assembly. The focusing ring can drive the lens assembly to be screwed in or out relative to the base to adjust the relative distance between the lens assembly and the Micro-LED display chip.

[0007] In some embodiments, the optical engine mounting fixture includes a fixed block, a sliding clamping block, and an adjustable clamping block; the fixed block is connected and fixed to the posture adjustment platform, and the middle of the fixed block is provided with a mounting groove for placing the Micro-LED projection optical engine; the side wall of the fixed block is also provided with a sliding groove communicating with the mounting groove, and the sliding clamping block can be slidably inserted into the sliding groove and abut against one side of the base; the adjustable clamping block is connected and fixed to the fixed block and is used to abut against the other side of the base.

[0008] In some embodiments, the focusing ring includes an outer ring body and connecting rods; one end of each of the two connecting rods is integrally connected to the inner sidewall of the outer ring body, and the other ends of the two connecting rods extend radially along the outer ring body and are disposed opposite to each other; the opposite ends of the two connecting rods are both arc-shaped structures and are used for fitting and connecting with the lens assembly, and the arc-shaped structures are provided with anti-slip wrinkles.

[0009] In some embodiments, the CMOS camera assembly includes a CMOS camera and an AR lens; the AR lens is mounted and connected to the bottom of the CMOS camera, and the AR lens is located above and opposite to the lens assembly.

[0010] In some embodiments, the pose adjustment stage includes a first horizontal adjustment component, a second horizontal adjustment component, a vertical adjustment component, a first rotation offset component, a second rotation offset component, a slide, a base, and a support platform; the slide is slidably connected to the base, and the first horizontal adjustment component, the second horizontal adjustment component, the vertical adjustment component, the first rotation offset component, the second rotation offset component, and the support platform are sequentially arranged above the slide; the first horizontal adjustment component and the second horizontal adjustment component are respectively used to drive the support platform to move along a first horizontal direction and a second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction; the vertical adjustment component is used to drive the support platform to move along a vertical direction; the first rotation offset component and the second rotation offset component are used to drive the support platform to rotate by a certain angle, and the rotation planes of the first rotation offset component and the second rotation offset component are perpendicular to each other; the optomechanical assembly fixture is arranged on the support platform.

[0011] In some embodiments, the system further includes a base plate, a bracket, and a slider; the bottom end of the bracket is connected and fixed to the base plate, and a first slide rail extending vertically is provided on the side plate of the bracket; the slider is slidably connected to the first slide rail and can be locked to the first slide rail; the CMOS camera assembly is connected and fixed to the slider.

[0012] In some embodiments, the optomechanical assembly fixture further includes a support plate, a guide pin, and an adjusting screw; the support plate is fixedly connected to the posture adjustment platform, the fixed block is provided with a second slide rail, the bottom end of the sliding abutment block is provided with a sliding groove, and the sliding groove is slidably connected to the second slide rail; the support plate is provided with a guide hole, one end of the guide pin is connected to the sliding abutment block, and the other end is slidably inserted into the guide hole; one end of the adjusting screw passes through the support plate and is threadedly connected to the sliding abutment block to drive the sliding abutment block to slide along the second slide rail; the adjustable abutment block is fixedly connected to the fixed plate by fasteners, and the adjustable abutment block is provided with an oblong through hole for the fasteners to pass through.

[0013] This invention also provides a method for assembling and adjusting a Micro-LED projection optical engine. Based on the aforementioned assembly and adjustment device for a Micro-LED projection optical engine, the method includes the following steps: screwing the lens assembly of the Micro-LED projection optical engine into the base thread of the Micro-LED projection optical engine to assemble it into an unfocused Micro-LED projection optical engine; fixing the unfocused Micro-LED projection optical engine onto an optical engine assembly and adjustment fixture; adjusting the pose adjustment stage so that the optical axis of the Micro-LED projection optical engine is coaxial with the axis of the CMOS camera assembly; illuminating the Micro-LED display chip to display a black and white stripe pattern in the meridional and sagittal directions; controlling the CMOS camera assembly to capture the black and white stripe pattern image projected by the lens assembly; rotating the focusing ring to rotate the lens assembly, adjusting the screw-in depth of the lens assembly thread, and changing the relative distance between the lens assembly and the Micro-LED display chip; continuously rotating the focusing ring to observe the change pattern of the clarity of the black and white stripe pattern image until the optimal focusing position is reached; and fixing the lens assembly and the base.

[0014] In some embodiments, the step of "fixing the lens assembly and the base" includes: applying adhesive to the threaded connection between the lens assembly and the base, and using ultraviolet light to cure the adhesive.

[0015] In some implementations, in the step of "continuously rotating the focusing ring and observing the change pattern of the clarity of the black and white striped image until the optimal focusing position is reached": during focusing, the CMOS camera component is controlled to capture the black and white striped image in real time and calculate the MTF value. When the MTF value reaches the maximum value, the position is determined to be the optimal focusing position.

[0016] The present invention achieves the following technical effects compared to the prior art: The present invention provides an assembly and adjustment device and method for a Micro-LED projection optical engine. The Micro-LED projection optical engine is fixed to a position adjustment stage using an optical engine assembly and adjustment fixture. The position adjustment stage drives the movement of the Micro-LED projection optical engine, ensuring that the projection optical axis of the Micro-LED projection optical engine is coaxial with the axis of the camera assembly. The CMOS camera assembly captures the image transmitted through the lens assembly. A focusing ring then drives the lens assembly of the Micro-LED projection optical engine to be screwed in or out relative to the base thread to adjust the screw depth, thereby adjusting the relative distance between the lens assembly and the Micro-LED display chip. The invention uses an optical engine assembly and adjustment fixture for fixation, a position adjustment stage to adjust the optical axis, a focusing ring to adjust the focal length, and a CMOS camera assembly to capture images. The system can then adjust to the clearest position based on the image sharpness, which is considered the optimal focusing position. In other words, the present invention can precisely adjust the relative position of the display chip and the lens assembly, ensuring that the back focus of the lens assembly accurately falls on the photosensitive surface of the display chip, thus ensuring a clear projection image. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the assembly and adjustment device for a Micro-LED projection optical engine in some embodiments of the present invention; Figure 2 This is a schematic diagram showing the connection between the CMOS camera assembly and the bracket in some embodiments of the present invention; Figure 3 This is a schematic diagram showing the connection between the optical engine mounting fixture, the focusing ring, and the Micro-LED projection optical engine in some embodiments of the present invention; Figure 4 This is a schematic diagram of the structure of the optomechanical assembly fixture in some embodiments of the present invention. Figure 5 This is a schematic diagram showing the connection between the fixed block, the adjustable clamping block and the Micro-LED projection optical engine in some embodiments of the present invention; Figure 6 This is one of the structural schematic diagrams of the sliding abutment block in some embodiments of the present invention; Figure 7 This is a second schematic diagram of the structure of the sliding abutment block in some embodiments of the present invention; Figure 8This is a schematic diagram of the structure of a Micro-LED projection optical engine in some embodiments of the present invention; Figure 9 This is a schematic diagram of the focusing ring structure in some embodiments of the present invention; Figure 10 This is a schematic diagram of the posture adjustment stage in some embodiments of the present invention; Figure 11 This is a cross-sectional view of the pose adjustment stage in some embodiments of the present invention; Figure 12 This is a schematic diagram of the vertical adjustment component in some embodiments of the present invention; In the diagram: 1-Micro-LED projection optical engine; 2-Optical engine mounting fixture; 3-Position adjustment stage; 4-Focusing ring; 5-CMOS camera assembly; 6-Base plate; 7-Bracket; 8-Slider; 9-First slide rail; 11-Lens assembly; 12-Base; 13-Micro-LED display chip; 21-Fixing block; 22-Sliding clamping block; 23-Adjustable clamping block; 24-Support plate; 25-Guide pin; 26-Adjusting screw; 27-Second slide rail; 31-First horizontal adjustment assembly; 32-Second horizontal adjustment assembly; 33-Vertical adjustment assembly; 34-First rotation offset assembly; 35-Second rotation offset assembly; 36-Slide table; 37-Base; 38-Support platform; 41-Outer ring; 42-Connecting rod; 43-Arc-shaped structure; 51-CMOS camera; 52-AR lens. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide an assembly and adjustment device and method for a Micro-LED projection optical engine to solve the problems existing in the prior art. It can accurately adjust the relative position of the display chip and the lens group, so that the back focal length of the lens group falls precisely on the photosensitive surface of the display chip, thereby ensuring the clear presentation of the projected image.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] This invention provides an assembly and adjustment device for a Micro-LED projection optical engine, such as... Figures 1 to 12As shown, it includes an optical engine mounting fixture 2, a posture adjustment stage 3, a focusing ring 4, and a CMOS camera assembly 5; wherein, the optical engine mounting fixture 2 is disposed on the posture adjustment stage 3, and the optical engine mounting fixture 2 is used to clamp and fix the base 12 of the Micro-LED projection optical engine 1; the focusing ring 4 is sleeved on the lens group 11 of the Micro-LED projection optical engine 1.

[0023] The lens of the CMOS camera assembly 5 is positioned opposite to the lens group 11 of the Micro-LED projection optical engine 1. The pose adjustment stage 3 can drive the Micro-LED projection optical engine 1 to move so that the optical axis of the Micro-LED projection optical engine 1 and the axis of the CMOS camera assembly 5 are in a coaxial position. The CMOS camera assembly 5 is used to capture images projected by the lens group 11. The focusing ring 4 can drive the lens group 11 to be screwed in or out relative to the base 12 to adjust the relative distance between the lens group 11 and the Micro-LED display chip 13.

[0024] It should be noted that the CMOS camera assembly 5 is used to capture the projected image in real time. The lens group is threadedly connected to the base. When the focusing ring 4 is turned, the thread depth of the lens group will change, and the clarity of the corresponding image will change. Finally, the lens group 11 is adjusted to the position to achieve the clearest image.

[0025] In some embodiments, such as Figures 3 to 7 As shown, the optical engine mounting fixture 2 includes a fixed block 21, a sliding abutment block 22, and an adjustable abutment block 23. The fixed block 21 is connected and fixed to the posture adjustment platform 3, and the middle part of the fixed block 21 is provided with a mounting groove for placing the Micro-LED projection optical engine 1. The side wall of the fixed block 21 is also provided with a sliding groove communicating with the mounting groove. The sliding abutment block 22 can be slidably inserted into the sliding groove and abut against one side of the base 12. The adjustable abutment block 23 is connected and fixed to the fixed block 21 and is used to abut against the other side of the base 12.

[0026] In some embodiments, the focusing ring 4 includes an outer ring body 41 and connecting rod portions 42; one end of the two connecting rod portions 42 is integrally connected to the inner sidewall of the outer ring body 41, and the other end of the two connecting rod portions 42 extends radially along the outer ring body 41 and the other ends of the two connecting rod portions 42 are arranged opposite to each other; the opposite ends of the two connecting rod portions 42 are both arc-shaped structures 43 and are used to be adapted to be connected with the lens assembly 11, and the arc-shaped structures 43 are provided with anti-slip wrinkles.

[0027] It should be noted that, as Figure 3 and Figure 9As shown, the focusing ring 4 of the present invention is attached to the lens group 11 and can drive the lens group 11 to rotate. The Micro-LED display chip 13 and the base 12 are fixed on the posture adjustment stage 3 by the optomechanical mounting clamp 2. The arc structure 43 at the other end of the connecting rod 42 is adapted to contact the outer periphery of the lens group 11. The two connecting rods 42 can be locked with the lens group 11 in the circumferential direction. At this time, the lens group 11 can be rotated by turning the focusing ring 4.

[0028] In some embodiments, such as Figure 2 As shown, the CMOS camera assembly 5 includes a CMOS camera 51 and an AR lens 52; the AR lens 52 is mounted and connected to the bottom of the CMOS camera 51, and the AR lens 52 is located above the lens group 11 and is disposed opposite to the lens group 11.

[0029] The AR lens 52 of the present invention is used in conjunction with the CMOS camera 51 and is mounted on the base plate 6 via the bracket 7.

[0030] In some embodiments, such as Figures 10 to 12 As shown, the pose adjustment stage 3 includes a first horizontal adjustment component 31, a second horizontal adjustment component 32, a vertical adjustment component 33, a first rotation offset component 34, a second rotation offset component 35, a slide 36, a base 37, and a support platform 38. The slide 36 is slidably connected to the base 37, and the first horizontal adjustment component 31, the second horizontal adjustment component 32, the vertical adjustment component 33, the first rotation offset component 34, the second rotation offset component 35, and the support platform 38 are sequentially arranged above the slide 36. The first horizontal adjustment component 31 and the second horizontal adjustment component 32 are respectively used to move the support platform 38 along a first horizontal direction and a second horizontal direction, with the first horizontal direction perpendicular to the second horizontal direction. The vertical adjustment component 33 is used to move the support platform 38 along a vertical direction. The first rotation offset component 34 and the second rotation offset component 35 are used to rotate the support platform 38 by a certain angle, and the rotation planes of the first rotation offset component 34 and the second rotation offset component 35 are perpendicular to each other. An optomechanical assembly fixture 2 is provided on the support platform 38.

[0031] It should be noted that the first horizontal adjustment component 31 and the second horizontal adjustment component 32 of the present invention have the same structure, both including two horizontally connected plates, one of which is provided with a first push rod and the other horizontally provided with a connecting block. One end of the first push rod is connected to the connecting block. By turning the first push rod, the two horizontally connected plates can move relative to each other.

[0032] The first rotation offset assembly 34 and the second rotation offset assembly 35 have the same structure, both including two rotating plates. The contact surface of the two rotating plates is an arc-shaped surface. A worm gear is provided on the lower rotating plate, and the upper rotating plate is adapted to mesh with the worm gear. By turning the worm gear, the upper rotating plate can be driven to rotate along the arc by a certain angle.

[0033] like Figure 12 As shown, the vertical adjustment assembly 38 includes two slidably connected vertical plates, and one of the vertical plates is provided with a second push rod and a rotating bracket. The rotating bracket includes two support arms at a certain angle, one of which abuts against the push rod, and the other support arm abuts against the other vertical plate. By turning the second push rod, the rotating bracket can be pushed to rotate, and the rotating bracket can drive the other vertical plate to move in the vertical direction.

[0034] It should be noted that the present invention can achieve adjustment of six degrees of freedom, namely, three degrees of freedom of movement and three degrees of freedom of rotation of the Micro-LED projection optical engine, through the posture adjustment stage 3 and the focusing ring 4. Furthermore, those skilled in the art can specifically set the structure of the posture adjustment stage 3 according to the actual situation. The present invention does not make specific limitations in this regard, as long as it can achieve the effect of moving and rotating the Micro-LED projection optical engine.

[0035] In some embodiments, such as Figure 2 As shown, it also includes a base plate 6, a bracket 7, and a slider 8; the bottom end of the bracket 7 is connected and fixed to the base plate 6, and a first slide rail 9 extending in the vertical direction is provided on the side plate of the bracket 7; the slider 8 is slidably connected to the first slide rail 9 and can be locked to the first slide rail 9; the CMOS camera assembly 5 is connected and fixed to the slider 8.

[0036] In some embodiments, such as Figures 3 to 7 As shown, the optomechanical assembly fixture 2 also includes a support plate 24, a guide pin 25, and an adjusting screw 26. The support plate 24 is connected and fixed to the posture adjustment table 3. A second slide rail 27 is provided on the fixing block 22. A sliding groove is provided at the bottom end of the sliding abutment block 22, and the sliding groove is slidably connected to the second slide rail 27. A guide hole is provided on the support plate 24. One end of the guide pin 25 is connected to the sliding abutment block 22, and the other end is slidably inserted into the guide hole. One end of the adjusting screw 26 passes through the support plate 24 and is threadedly connected to the sliding abutment block to drive the sliding abutment block to slide along the second slide rail. The adjustable clamping block 23 is connected and fixed to the fixed plate 21 by fasteners, and the adjustable clamping block 23 is provided with a waist-shaped through hole for the fasteners to pass through.

[0037] The present invention provides an elongated waist-shaped through hole on the adjustable abutment block 23, which allows for adjustment of the connection position between the adjustable abutment block 23 and the fixed plate 21, so as to abut against one side of the base 12.

[0038] The present invention also provides a method for assembling and adjusting a Micro-LED projection optical engine, based on the above-described assembly and adjustment device for a Micro-LED projection optical engine, comprising the following steps: Step S1: Screw the lens assembly 11 of the Micro-LED projection optical engine 1 into the base 12 of the Micro-LED projection optical engine 1 to assemble it into an unfocused Micro-LED projection optical engine 1. Step S2: Fix the unfocused Micro-LED projection optical engine 1 onto the optical engine mounting fixture 2; Step S3: Adjust the pose adjustment stage 3 so that the optical axis of the Micro-LED projection optical engine 1 is coaxial with the axis of the CMOS camera assembly 5; Step S4: Light up the Micro-LED display chip 13 to display black and white stripe patterns in the meridional and sagittal directions; Step S5: Control the CMOS camera assembly 5 to capture the black and white striped image projected by the lens group 11; Step S6: Rotate the focusing ring 4 to drive the lens group 11 to rotate, adjust the screw depth of the lens group 11, and change the relative distance between the lens group 11 and the Micro-LED display chip 13. Step S7: Continuously rotate the focusing ring 4 and observe the pattern of changes in the sharpness of the black and white striped image until the optimal focusing position is reached. Step S8: Fix the lens assembly 11 and the base 12.

[0039] In some embodiments, step S8 specifically includes: applying adhesive to the threaded connection between the lens assembly 11 and the base 12, and using ultraviolet light to irradiate the adhesive to cure it.

[0040] In some embodiments, in step S6 above: During focusing, the CMOS camera assembly 5 is controlled to capture black and white stripe patterns in real time and calculate the MTF value. When the MTF value reaches the maximum value, the position is determined to be the optimal focusing position.

[0041] The assembly and adjustment steps of the assembly and adjustment device for a Micro-LED projection optical engine of the present invention specifically include: Screw the lens assembly 11 of the Micro-LED projection optical engine 1 into the thread of the base 12 to form an unfocused Micro-LED projection optical engine 1.

[0042] The unfocused Micro-LED projector optical engine 1 is fixed to the posture adjustment platform 3.

[0043] Adjust the pose adjustment stage 3 so that the optical axis of the Micro-LED projector optical engine 1 is coaxial with the axis of the CMOS camera-AR lens.

[0044] The Micro-LED display chip 13 is lit up to display black and white stripe patterns in the meridional and sagittal directions.

[0045] The image of a black and white striped pattern projected by the lens group 11 is captured using the CMOS camera 51.

[0046] Rotating the focusing ring 4 causes the lens group 11 to rotate, adjusting the screw depth of the lens group 11 and changing the relative distance between the lens group 11 and the Micro-LED display chip 13.

[0047] Continue rotating the focusing ring 4 and observe the pattern of change in the clarity of the black and white stripe pattern until the black and white stripe pattern reaches its clearest position. This is considered the optimal focusing position.

[0048] Apply UV glue to the threads of lens assembly 11 and base 12, and use a UV lamp to cure the glue, thus fixing the Micro-LED projection optical engine 1.

[0049] This invention uses a CMOS camera 51 to capture projected black and white stripe images, analyzes each stripe region, reduces the grayscale value of white stripes while increasing the grayscale value of black stripes, and traverses the grayscale values ​​along the vertical lines of the black and white stripes, recording the maximum grayscale value I. max and minimum value I min Then MTF = (I max -I min ) / (I max +I min During focusing, the CMOS camera 51 is used to capture a stripe pattern and calculate the MTF value. When the MTF value reaches its maximum value, the position is determined to be the sharpest position, and focusing is completed.

[0050] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An assembly and adjustment device for a Micro-LED projection optical engine, characterized in that, This includes optical and mechanical mounting fixtures, a pose adjustment stage, a focusing ring, and CMOS camera components; The optical engine assembly and adjustment fixture is disposed on the posture adjustment platform, and the optical engine assembly and adjustment fixture is used to clamp and fix the base of the Micro-LED projection optical engine; The focusing ring is fitted around the lens assembly of the Micro-LED projection optical engine; The lens of the CMOS camera assembly is positioned opposite to the lens group, and the pose adjustment stage can drive the Micro-LED projection optical engine to move, so that the optical axis of the Micro-LED projection optical engine and the axis of the CMOS camera assembly are coaxial; the CMOS camera assembly is used to capture images projected by the lens group. The focusing ring can drive the lens assembly to screw in or out relative to the base thread to adjust the relative distance between the lens assembly and the Micro-LED display chip.

2. The assembly and adjustment device for a Micro-LED projection optical engine according to claim 1, characterized in that, The optomechanical assembly fixture includes a fixed block, a sliding clamping block, and an adjustable clamping block; The fixing block is connected and fixed to the posture adjustment platform, and the middle part of the fixing block is provided with a mounting groove for placing the Micro-LED projector. The side wall of the fixing block is also provided with a sliding groove that communicates with the mounting groove, and the sliding abutment block can be slidably inserted into the sliding groove and abut against one side of the base; The adjustable clamping block is connected and fixed to the fixed block and is used to abut against the other side of the base.

3. The assembly and adjustment device for a Micro-LED projection optical engine according to claim 1, characterized in that, The focusing ring includes an outer ring body and a connecting rod portion; One end of each of the two connecting rods is integrally connected to the inner sidewall of the outer ring body, and the other ends of the two connecting rods extend radially along the outer ring body and are arranged opposite to each other; The opposite ends of the two connecting rods are both arc-shaped structures and are used to connect with the lens assembly. The arc-shaped structures are provided with anti-slip wrinkles.

4. The assembly and adjustment device for a Micro-LED projection optical engine according to claim 1, characterized in that, The CMOS camera assembly includes a CMOS camera and an AR lens; The AR lens is mounted and connected to the bottom of the CMOS camera, and the AR lens is located above the lens group and is positioned opposite to the lens group.

5. The assembly and adjustment device for a Micro-LED projection optical engine according to claim 1, characterized in that, The pose adjustment platform includes a first horizontal adjustment component, a second horizontal adjustment component, a vertical adjustment component, a first rotation offset component, a second rotation offset component, a slide, a base, and a support platform; The slide is slidably connected to the base, and the first horizontal adjustment component, the second horizontal adjustment component, the vertical adjustment component, the first rotation offset component, the second rotation offset component, and the support platform are sequentially arranged above the slide. The first horizontal adjustment component and the second horizontal adjustment component are respectively used to drive the support platform to move along a first horizontal direction and a second horizontal direction, wherein the first horizontal direction is perpendicular to the second horizontal direction; the vertical adjustment component is used to drive the support platform to move along a vertical direction; The first rotation offset component and the second rotation offset component are used to drive the support platform to rotate at a certain angle, and the rotation planes of the first rotation offset component and the second rotation offset component are perpendicular to each other; the optomechanical assembly and adjustment fixture is provided on the support platform.

6. The assembly and adjustment device for a Micro-LED projection optical engine according to claim 1, characterized in that, It also includes a base plate, a support frame, and a slider; The bottom end of the bracket is connected and fixed to the base plate, and a first slide rail extending in the vertical direction is provided on the side plate of the bracket. The slider is slidably connected to the first slide rail and can be locked to the first slide rail. The CMOS camera assembly is connected and fixed to the slider.

7. The assembly and adjustment device for a Micro-LED projection optical engine according to claim 2, characterized in that, The optomechanical assembly fixture also includes a support plate, a guide pin, and an adjusting screw; The support plate is connected and fixed to the posture adjustment platform. A second slide rail is provided on the fixed block. A slide groove is provided at the bottom end of the sliding abutment block, and the slide groove is slidably connected to the second slide rail. The support plate is provided with a guide hole, one end of the guide pin is connected to the sliding abutment block, and the other end is slidably inserted into the guide hole; one end of the adjusting screw passes through the support plate and is threadedly connected to the sliding abutment block to drive the sliding abutment block to slide along the second slide rail; The adjustable clamping block is connected and fixed to the fixed plate by fasteners, and the adjustable clamping block has a waist-shaped through hole for the fasteners to pass through.

8. A method for assembling and adjusting a Micro-LED projection optical engine, characterized in that, The assembly and adjustment device for a Micro-LED projection optical engine based on any one of claims 1-7 includes the following steps: Screw the lens assembly of the Micro-LED projector into the base thread of the Micro-LED projector to assemble the unfocused Micro-LED projector. Fix the unfocused Micro-LED projection optical engine onto the optical engine mounting fixture; Adjust the pose adjustment stage so that the optical axis of the Micro-LED projector is coaxial with the axis of the CMOS camera assembly; Light up the Micro-LED display chip to display black and white stripe patterns in the meridional and sagittal directions; Control the CMOS camera assembly to capture a black and white striped image projected by the lens group; Rotating the focusing ring causes the lens assembly to rotate, adjusting the screw depth of the lens assembly and changing the relative distance between the lens assembly and the Micro-LED display chip; Continue rotating the focusing ring and observe the pattern of changes in the sharpness of the black and white striped image until the optimal focusing position is reached. Secure the lens assembly and the base.

9. The assembly and adjustment method for a Micro-LED projection optical engine according to claim 8, characterized in that, The step of "fixing the lens assembly and the base" includes: Apply glue to the threaded connection between the lens assembly and the base, and then use an ultraviolet lamp to cure the glue.

10. The assembly and adjustment method for a Micro-LED projection optical engine according to claim 8, characterized in that, In the step of "continuously rotating the focusing ring and observing the change pattern of the sharpness of the black and white striped image until the optimal focusing position is reached": During focusing, the CMOS camera assembly is controlled to capture black and white stripe patterns in real time and calculate the MTF value. When the MTF value reaches the maximum value, the position is determined to be the optimal focusing position.

Images