High-precision laminating alignment device and laminating alignment method

Abstract

The application discloses a high-precision laminating alignment device and a laminating alignment method. The device comprises a first laminating station, a second laminating station and a third laminating station. The first laminating station comprises a conveying module, a first jig and a first adjusting mechanism. The first jig is arranged on one side of the conveying module. A micro display is arranged on the top of the conveying module. A three-color light combiner is arranged on the first jig. A first glue spraying mechanism and a first photographing mechanism are connected to the first adjusting mechanism. A first imaging mechanism is arranged above a second jig. A curing mechanism is arranged on one side of the first jig and the second jig. A feeding bracket is used for placing a projection lens for lamination. A second feeding mechanism moves the projection lens to the top of the second jig. A second glue spraying mechanism is used for laminating the projection lens and the three-color light combiner. The third laminating station is used for laminating the micro display on the other two sides of the three-color light combiner.

Description

Technical Field

[0001] This invention relates to the field of bonding and alignment, and more specifically, to a high-precision bonding and alignment device and a bonding and alignment method. Background Technology

[0002] Micro LED display technology refers to a display technology that uses self-emissive, micrometer-sized LEDs as light-emitting pixel units, assembling them onto a driving panel to form a high-density LED array. Due to the small size, high integration, and self-emissive nature of micro LED chips, they offer significant advantages over LCD and OLED displays in terms of brightness, resolution, contrast ratio, energy consumption, lifespan, response speed, and thermal stability. Currently, there is very little research on the bonding process for Micro LED screens. Compared to existing prism bonding solutions, the bonding process for Micro LED involves smaller bonding objects, higher precision in bonding control, and a more complex process. Existing cube (three-color combining prism) bonding devices cannot meet the requirements of Micro LED bonding processes.

[0003] In existing technologies, the microdisplay is simply bonded to the three-color combining prism without being aligned with the projection lens (AA), making it impossible to view the imaging effect. After the three-color prism is bonded, there is a significant color difference, which affects the final image quality. Summary of the Invention

[0004] To address at least one of the aforementioned technical problems, this invention proposes a high-precision bonding and alignment device and a bonding and alignment method.

[0005] The first aspect of the present invention provides a high-precision bonding and alignment device, comprising: a first bonding station, a second bonding station and a third bonding station;

[0006] 1. The first bonding station includes a conveying module, a first fixture, and a first adjustment mechanism;

[0007] The first fixture is disposed on one side of the conveying module, the top of the conveying module is provided with a micro display, and the first fixture is provided with a three-color combining prism;

[0008] The first adjustment mechanism is connected to a first glue spraying mechanism and a first photographing mechanism, and both the first glue spraying mechanism and the first photographing mechanism can slide along the first adjustment mechanism.

[0009] The first adhesive spraying mechanism can attach the microdisplay to one side of the three-color combining prism;

[0010] The second bonding station includes a first imaging mechanism, a second fixture, a second glue spraying mechanism, and a feeding mechanism. The first imaging mechanism is disposed above the second fixture, and the feeding mechanism and the second glue spraying mechanism are respectively disposed on both sides of the second fixture.

[0011] Both the first fixture and the second fixture are provided with a curing mechanism on one side; the curing mechanism is an ultraviolet lamp.

[0012] The second feeding mechanism is connected to a feeding bracket at its end, and the feeding bracket is provided with a through hole;

[0013] The feeding tray is used to hold the projection lens for bonding;

[0014] The second glue spraying mechanism can rotate, and the second feeding mechanism moves the projection lens to the top of the second fixture, and the lens is attached to the three-color light combining prism through the second glue spraying mechanism;

[0015] The third bonding station is used to bond the microdisplay to the other two sides of the tri-color combining prism.

[0016] In a preferred embodiment of the present invention, the first adjustment mechanism includes a first bracket and a horizontal sliding module. The horizontal sliding module is disposed on the top of the first bracket. The first glue spraying mechanism and the first photographing mechanism are connected side by side to one side of the horizontal sliding module. Both the first glue spraying mechanism and the first photographing mechanism can slide along the horizontal sliding module.

[0017] In a preferred embodiment of the present invention, the end of the first glue spraying mechanism is connected to a first movable shaft, the first movable shaft is connected to a first vertical slide plate, one side of the first vertical slide plate is connected to a first glue spraying vertical sliding module, one side of the first glue spraying vertical sliding module is connected to a first horizontal slide plate, and the first horizontal slide plate is connected to the horizontal sliding module.

[0018] In a preferred embodiment of the present invention, the first imaging mechanism includes a second support, an imaging fixing plate and a CCD camera. The imaging fixing plate is mounted on the top of the second support, a second adjusting block is provided at the end of the imaging fixing plate, a first adjusting block is provided on one side of the second adjusting block, and the CCD camera is provided on one side of the first adjusting block.

[0019] In a preferred embodiment of the present invention, a first adjustment knob is provided on one side of the second adjustment block, the first adjustment knob being used to adjust the second adjustment block to slide in the horizontal direction, and a second adjustment knob is provided on the other side of the second adjustment block, the second adjustment knob being used to adjust the second adjustment block to slide in the vertical direction.

[0020] In a preferred embodiment of the present invention, the feeding mechanism includes a feeding base and a feeding horizontal slider connected to the top of the feeding base. The feeding horizontal slider is slidable in a horizontal direction. A feeding fixing plate is provided on the top of the feeding horizontal slider. A first feeding module is provided on one side of the feeding fixing plate. A feeding vertical slider is provided on one side of the first feeding module. A feeding rotating shaft is provided on one side of the feeding vertical slider. A feeding fine-tuning seat is provided at the end of the feeding rotating shaft. The feeding bracket is provided on one side of the feeding fine-tuning seat.

[0021] In a preferred embodiment of the present invention, the second fixture includes a fixture upright plate, a fixture vertical slider is provided on one side of the fixture upright plate, a fixture base plate is provided on one side of the fixture vertical slider, a fixture turntable is provided on the top of the fixture base plate, a second adjustment platform is provided on the top of the fixture turntable, a first adjustment platform is connected to the top of the second adjustment platform, and a fixture support plate is provided on the top of the first adjustment platform.

[0022] In a preferred embodiment of the present invention, a fixture angle adjustment knob is connected to one side of the fixture turntable, and the fixture angle adjustment knob is used to adjust the rotation angle of the fixture turntable. A third adjustment knob is provided on one side of the first adjustment table, and the third adjustment knob is used to adjust the sliding of the first adjustment table. A fourth adjustment knob is provided on one side of the second adjustment table, and the fourth adjustment knob is used to adjust the sliding of the second adjustment table.

[0023] A second aspect of the present invention provides a high-precision bonding and alignment method, applied to a high-precision bonding and alignment device, comprising the following steps:

[0024] S 1. Place the three-color combining prism on top of the first fixture, and transport the micro display to the top of the first fixture through the transport module;

[0025] S2, the first camera mechanism is adjusted to move directly above the first fixture by the first adjustment mechanism, and when the micro display of the first camera mechanism moves directly above the tri-color combining prism, the micro display is attached to one side of the tri-color combining prism by the glue spraying mechanism.

[0026] S3, place the tri-color combining prism with a micro-display attached to one side on the second fixture, and move the projection lens on the feeding bracket to above the tri-color combining prism through the feeding mechanism;

[0027] S4. The first imaging mechanism acquires the image generated by the projection lens coinciding with the three-color combining prism, and adjusts the position of the projection lens in real time so that the center of the projection lens coincides with the center of one side of the three-color combining prism. The second adhesive spraying mechanism is used to attach and fix the image, and form an attachment reference.

[0028] S5, according to the bonding reference, attach the micro-displays to the other two sides of the tri-color combining prism respectively.

[0029] In a preferred embodiment of the present invention, after the adhesive is sprayed by the first adhesive spraying mechanism and the second adhesive spraying mechanism, it is cured by ultraviolet irradiation by the curing mechanism.

[0030] The technical solution of the present invention has the following advantages compared with the prior art:

[0031] In the first station, a miniature display is attached to one side of a cubic three-color combining prism. Then, a projection lens is attached to the side of the three-color combining prism symmetrical to the first attached miniature display. When attaching the projection lens, the first imaging mechanism displays the image in real time, so that the pixels of the display screens of the projected miniature display and the projection lens are aligned, resulting in high attachment accuracy. In addition, the attached lens and the miniature display form a bonding reference. The other two miniature displays are attached using the bonding reference, resulting in small color difference and good imaging effect. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, some of the drawings in the following description are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the three-dimensional structure of the first workstation in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram showing the connection between the first adjustment mechanism and the first glue spraying mechanism in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the three-dimensional structure of the second bonding station in an embodiment of the present invention;

[0036] Figure 4 This is a three-dimensional structural diagram of the first glue spraying mechanism according to an embodiment of the present invention;

[0037] Figure 5 This is a three-dimensional structural diagram of the feeding mechanism according to an embodiment of the present invention;

[0038] Figure 6 This is a three-dimensional structural diagram of the second fixture according to an embodiment of the present invention;

[0039] Figure 7 This is a three-dimensional structural diagram of the second glue spraying mechanism according to an embodiment of the present invention;

[0040] Figure 8This is a schematic diagram of the three-dimensional structure of the third bonding station in an embodiment of the present invention.

[0041] In the figure, 10 is the first glue spraying mechanism, 1001 is the first horizontal slide plate, 1002 is the first vertical slide plate, 1003 is the first movable shaft, 1004 is the first glue spraying head, 1005 is the first glue spraying vertical sliding module, and 1006 is the first glue spraying vertical sliding motor.

[0042] 11. Conveying module; 12. First base; 13. First fixture; 14. Shape detection device;

[0043] 15. First imaging mechanism; 1501. Detection fixing plate; 1502. Imaging and detection head;

[0044] 16. First adjustment mechanism; 1601. First support; 1602. Horizontal sliding motor; 1603. Horizontal sliding module;

[0045] 1. First imaging mechanism; 101. Imaging fixing plate; 102. Second bracket; 103. Adjustment head; 104. First adjustment knob; 105. CCD camera; 106. First adjustment block; 107. Second adjustment block; 108. Second adjustment knob; 109. Fixing rib.

[0046] 2. Feeding structure, 201. First feeding motor, 202. First feeding module, 203. Feeding fixing plate, 204. Second feeding motor, 205. Feeding shaft, 206. Feeding base, 207. Feeding horizontal slider, 208. Feeding guide rail, 209. Feeding sliding motor, 210. Feeding bracket, 211. Feeding fine adjustment seat, 212. Third feeding motor, 213. Fourth feeding motor, 214. Feeding vertical slider;

[0047] 3. Debugging mechanism; 4. Curing mechanism;

[0048] 5. Second fixture; 501. Fixture support plate; 502. First adjusting platform; 503. Fixture angle adjusting knob; 504. Second adjusting platform; 505. Fixture turntable; 506. Third adjusting knob; 507. Fixture base plate; 508. Fixture vertical slider; 509. Fixture upright plate; 510. Fixture vertical adjusting knob; 511. Fourth adjusting knob;

[0049] 6. Second base; 7. Adhesive wiping mechanism;

[0050] 8. Second glue spraying mechanism; 801. Second glue spraying vertical motor; 802. Limiting mechanism; 803. Second glue spraying horizontal module; 804. Second glue spraying horizontal motor; 805. Second glue spraying rotating column; 806. Second glue spraying head; 807. Second glue spraying rotating shaft; 808. Second glue spraying sliding table.

[0051] 17. Movable support; 18. Photoelectric collimator; 19. Panel feeding mechanism; 20. Fixture adjustment seat; 21. Third fixture; 22. Second imaging mechanism; 23. Third glue spraying mechanism. Detailed Implementation

[0052] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0053] Many specific details are set forth in the following description in order to provide a full understanding of the invention.

[0054] However, the present invention may also be implemented in other ways different from those described herein.

[0055] Therefore, the scope of protection of this invention is not limited to the specific embodiments disclosed below.

[0056] Example 1

[0057] See Figures 1-8 As shown, the present invention proposes a high-precision bonding and alignment device, comprising: a first bonding station, a second bonding station and a third bonding station;

[0058] The first bonding station includes a conveying module 11, a first fixture 13 and a first adjustment mechanism 16; an adjustment mechanism 3 is provided on one side of the first fixture 13.

[0059] The first fixture 13 is disposed on one side of the conveying module 11, the top of the conveying module 11 is provided with a micro display, and the first fixture 13 is provided with a three-color combining prism.

[0060] The first adjustment mechanism 16 is connected to the first glue spraying mechanism 10 and the first photographing mechanism 15. Both the first glue spraying mechanism 10 and the first photographing mechanism 15 can slide along the first adjustment mechanism 16.

[0061] The first adhesive spraying mechanism 10 can attach the micro-display to one side of the tri-color combining prism;

[0062] The second bonding station includes a first imaging mechanism 1, a second fixture 5, a second glue spraying mechanism 8, and a feeding mechanism 2. The first imaging mechanism 1 is located above the second fixture 5, and the feeding mechanism 2 and the second glue spraying mechanism 8 are respectively located on both sides of the second fixture 5.

[0063] Curing mechanism 4 is provided on one side of both the first fixture 13 and the second fixture 5. The curing mechanism 4 includes a curing bracket and a UV curing lamp set on the top of the curing bracket, which is cured by ultraviolet light irradiation.

[0064] The second feeding mechanism 2 is connected to a feeding bracket 210 at one end, and the feeding bracket 210 has a through hole.

[0065] The feeding tray 210 is used to hold the projection lens for bonding;

[0066] The glue spraying mechanism can rotate, and the second feeding mechanism 2 moves the projection lens to the top of the second fixture 5. The second glue spraying mechanism 8 then attaches the lens to the three-color light combining prism.

[0067] The third bonding station is used to bond the microdisplay to the other two sides of the tri-color combining prism.

[0068] Furthermore, a limiting mechanism is provided on the first fixture to limit the cube and restrict the distance between the panel and the cube, with the panel and the cube being attached as a reference.

[0069] The third bonding station includes a movable bracket 17, on which a movable module is mounted and connected to a third adhesive spraying mechanism 23. The movable module can drive the third adhesive spraying mechanism 23 to move. Below the third adhesive spraying mechanism 23, a third fixture 21 is provided. The top of the third fixture 21 is provided with a fixing mechanism, which fixes a tri-color beam combining prism with a micro-display and a lens. A panel loading mechanism 19 is provided on one side of the third fixture 21. The panel loading mechanism 19 is used to carry the micro-display and attach it to the other two sides of the tri-color beam combining prism. A photoelectric collimator 18 is provided on one side of the panel loading mechanism 19. The photoelectric collimator 18 is used for the initial coaxial adjustment of the product's optical path.

[0070] Furthermore, a second imaging mechanism 22 is provided on one side of the third fixture, which is used for imaging alignment, and a fixture adjustment seat 20 is provided at the bottom of the third fixture, which can adjust the position of the third fixture.

[0071] A first glue-spraying head 1004 is provided at the end of the first glue-spraying mechanism, a second glue-spraying head 806 is provided at the end of the second glue-spraying mechanism, a support base is provided at the bottom of the second glue-spraying mechanism, the support base is located on the top of the second base, and the support base is used to support the second glue-spraying mechanism. A third glue-spraying head is provided at the end of the third glue-spraying mechanism, and a glue-wiping mechanism 7 is provided below the first glue-spraying mechanism, the second glue-spraying mechanism 806, and the third glue-spraying mechanism.

[0072] Furthermore, the second glue spraying mechanism 8 includes a second glue spraying vertical motor 801, a second glue spraying vertical sliding module connected to the end of the second glue spraying vertical motor 801, a limit mechanism 802 provided on one side of the second glue spraying vertical sliding module, a second glue spraying horizontal sliding module 803 connected to one side of the second glue spraying vertical sliding module, a second glue spraying horizontal motor 804 provided at the end of the second glue spraying horizontal sliding module 803, a second glue spraying sliding table 808 provided on one side of the second glue spraying horizontal sliding module 803, a second glue spraying rotating column 805 provided on one side of the second glue spraying sliding table 808, and a second glue spraying head 806 hinged to the end of the second glue spraying rotating column 805 via a second glue spraying rotating shaft 807.

[0073] Specifically, it also includes a first base 12 and a second base 6. A first adjustment mechanism 16, a first fixture 13 and a conveying module 11 are fixedly installed on the top of the first base 12. A shape detection device 14 is also provided on the top of the first base 12. The shape detection device 14 is used to detect the tolerance of the cubic tri-color combining prism, and to remove the cubic tri-color combining prism with large tolerance, thereby improving the bonding accuracy.

[0074] Furthermore, the cube prisms have certain tolerances at the factory. The shape inspection device 14 can perform initial inspection on the cube prisms to determine their tolerances. Cube prisms with larger tolerances are rejected, and cube prisms with smaller tolerances are used for bonding to the micro-display. Before bonding, adhesive is sprayed onto the cube surface by an adhesive spraying mechanism. During the bonding process, the distance between the panel and the cube mounting surface is limited by structural limiting, which serves as a reference for bonding the second and third panels. The thickness of the optical adhesive is used to compensate for the cube's tolerances, thereby improving the bonding accuracy and imaging clarity.

[0075] According to an embodiment of the present invention, the first adjustment mechanism 16 includes a first support 1601 and a horizontal sliding module 1603. The horizontal sliding module 1603 is disposed on the top of the first support 1601. The first glue spraying mechanism 10 and the first photographing mechanism 15 are connected in parallel to one side of the horizontal sliding module 1603. Both the first glue spraying mechanism 10 and the first photographing mechanism 15 can slide along the horizontal sliding module 1603.

[0076] The first glue spraying mechanism 10 is connected to a first movable shaft 1003 at one end. The first movable shaft 1003 is connected to a first vertical slide plate 1002. A first glue spraying vertical sliding module 1005 is connected to one side of the first glue spraying vertical sliding module 1005. A first horizontal slide plate 1001 is connected to one side of the first glue spraying vertical sliding module 1005. The first horizontal slide plate 1001 is connected to the horizontal sliding module 1603.

[0077] Furthermore, a horizontal sliding motor 1602 is provided at one end of the horizontal sliding module 1603, and a first adhesive spraying vertical sliding motor 1006 is provided at the top of the first adhesive spraying vertical sliding module 1005. The first adhesive spraying vertical sliding motor 1006 is used to control the first adhesive spraying mechanism 10 to slide in the vertical direction. The first photographing mechanism 15 includes a detection fixing plate 1501 and a photographing detection head 1502. The photographing detection head 1502 is disposed on one side of the detection fixing plate 1501. The detection fixing plate 1501 is connected to one side of the horizontal sliding module 1603. The detection fixing plate 1501 can slide along the horizontal sliding module 1603. A photographing light source is provided below the photographing detection head 1502.

[0078] According to an embodiment of the present invention, the first imaging mechanism 1 includes a second support 102, an imaging fixing plate 101, and a CCD camera 105. The imaging fixing plate 101 is mounted on the top of the second support 102. A second adjusting block 107 is provided at the end of the imaging fixing plate 101. A first adjusting block 106 is provided on one side of the second adjusting block 107. The CCD camera 105 is provided on one side of the first adjusting block 106. A first adjusting knob 104 is provided on one side of the second adjusting block 107. The first adjusting knob 104 is used to adjust the second adjusting block 107 to slide in the horizontal direction. A second adjusting knob 108 is provided on the other side of the second adjusting block 107. The second adjusting knob 108 is used to adjust the second adjusting block 107 to slide in the vertical direction.

[0079] Furthermore, the imaging fixing plate 101 has an L-shaped structure, and the two fixing plates of the L-shaped structure are connected by fixing ribs 109. An adjustment head 103 is provided below the CCD camera 105. The adjustment head 103 is suspended and connected to the bottom of the imaging fixing plate 101. The CCD camera 105 is adjusted to slide in the vertical and horizontal directions by the first adjustment button 104 and the second adjustment button 108, which is used to adjust the alignment of the CCD camera 105 with the second fixture 5.

[0080] According to an embodiment of the present invention, the feeding mechanism 2 includes a feeding base and a feeding horizontal slider connected to the top of the feeding base. The feeding horizontal slider can slide in a horizontal direction. A feeding fixing plate 203 is provided on the top of the feeding horizontal slider. A first feeding module 202 is provided on one side of the feeding fixing plate 203. A feeding vertical slider 214 is provided on one side of the first feeding module 202. A feeding rotating shaft 205 is provided on one side of the feeding vertical slider 214. A feeding fine-tuning seat 211 is provided at the end of the feeding rotating shaft 205. A feeding bracket 210 is provided on one side of the feeding fine-tuning seat 211.

[0081] Furthermore, two feeding guide rails are arranged parallel to each other on the top of the feeding base. The feeding horizontal slider is connected to the feeding guide rail. A feeding sliding motor is set at one end of the feeding horizontal slider. The feeding horizontal slider is controlled to slide along the feeding guide rail by the feeding sliding motor. A first feeding motor 201 is set on the top of the first feeding module 202. The first feeding motor 201 is used to control the feeding vertical slider 214 to slide along the first feeding module 202. A second feeding motor 204 is set on one side of the feeding vertical slider 214. A fourth feeding motor 213 and a third feeding motor 212 are respectively set on the top and one side of the feeding fine adjustment seat 211. The third feeding motor 212 and the fourth feeding motor 213 are used to control the bracket to slide in the vertical or horizontal direction. A circular through hole is set on the bracket. During the alignment process of the imaging system, the imaging area of ​​the lens and the cubic three-color light combining prism can be displayed.

[0082] According to an embodiment of the present invention, the second fixture 5 includes a fixture upright plate 509, a fixture vertical slider 508 is provided on one side of the fixture upright plate 509, a fixture base plate 507 is provided on one side of the fixture vertical slider 508, a fixture turntable 505 is provided on the top of the fixture base plate 507, a second adjustment platform 504 is provided on the top of the fixture turntable 505, a first adjustment platform 502 is connected to the top of the second adjustment platform 504, and a fixture support plate 501 is provided on the top of the first adjustment platform 502.

[0083] According to an embodiment of the present invention, a fixture angle adjustment knob 503 is connected to one side of the fixture turntable 505. The fixture angle adjustment knob 503 is used to adjust the rotation angle of the fixture turntable 505. A third adjustment knob 506 is provided on one side of the first adjustment platform 502. The third adjustment knob 506 is used to adjust the sliding of the first adjustment platform 502. A fourth adjustment knob 511 is provided on one side of the second adjustment platform 504. The fourth adjustment knob 511 is used to adjust the sliding of the second adjustment platform 504.

[0084] A second aspect of the present invention provides a high-precision bonding and alignment method, applied to a high-precision bonding and alignment device, comprising the following steps:

[0085] S 1. Place the three-color combining prism on top of the first fixture 13, and transport the micro display to the top of the first fixture 13 through the transport module 11;

[0086] S2, the first photo-taking mechanism 15 is moved to the top of the first fixture 13 by the first adjustment mechanism 16, and when the micro display is moved to the top of the tri-color combining prism by the first photo-taking mechanism 15, the micro display is attached to one side of the tri-color combining prism by the glue spraying mechanism. After the camera takes a picture and identifies the center of Pane l and cube, the alignment is performed during the attachment.

[0087] S3, place the tri-color combining prism with a micro-display attached to one side on the second fixture 5, and drive the projection lens on the feeding bracket 210 to move above the tri-color combining prism through the feeding mechanism 2.

[0088] S4, the first imaging mechanism 1 acquires the image generated by the projection lens and the three-color light combining prism, and adjusts the position of the projection lens in real time so that the center of the projection lens coincides with the center of one side of the three-color light combining prism. The second adhesive spraying mechanism 8 is used to attach and fix the image, and form an attachment reference.

[0089] S5, according to the bonding reference, attach the micro-displays to the other two sides of the tri-color combining prism respectively.

[0090] According to an embodiment of the present invention, after the adhesive is sprayed by the first adhesive spraying mechanism 10 and the second adhesive spraying mechanism 8, it is cured by ultraviolet irradiation by the curing mechanism 4.

[0091] Specifically, the first, second, and third workstations are all equipped with adhesive spraying and curing mechanisms. After adhesive spraying, the material is fixed by ultraviolet light irradiation. The color difference caused by the tolerance of the cube is compensated by optical adhesive, that is, the color difference is corrected through process compensation.

[0092] Furthermore, in the first step, the gap between the cube (stereochromatic tri-color combining prism) and the panel (micro-display) is compensated using optical adhesive to compensate for the color difference caused by the cube's tolerance, that is, the color difference is corrected through process compensation. In the first step, the first panel is bonded to the cube as the reference for the second step AA. In the second step, the bonded material from the first step is AA-aligned and bonded to the AR projection lens. In the third step, based on the second step, two more panels are bonded to achieve pixel alignment, ultimately achieving the best imaging quality.

[0093] In summary, a micro-display is attached to one side of a cubic three-color combining prism at the first station. Then, a projection lens is attached to the side of the three-color combining prism symmetrical to the first attached micro-display. During the attachment of the projection lens, the first imaging mechanism 1 displays the image in real time, ensuring that the pixels of the projection micro-display and the projection lens overlap, resulting in high attachment accuracy. Furthermore, the attached lens and the micro-display form a bonding reference, which is used to attach the other two micro-displays. The color difference is small, and the imaging effect is good.

[0094] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0095] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to the above embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0096] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high-precision bonding and alignment device, comprising: The system comprises a first bonding station, a second bonding station, and a third bonding station; characterized in that... The first bonding station includes a conveying module, a first fixture, and a first adjustment mechanism; The first fixture is disposed on one side of the conveying module, the top of the conveying module is provided with a micro display, and the first fixture is provided with a three-color combining prism; The first adjustment mechanism is connected to a first glue spraying mechanism and a first photographing mechanism, and both the first glue spraying mechanism and the first photographing mechanism can slide along the first adjustment mechanism. The first adhesive spraying mechanism can attach the microdisplay to one side of the three-color combining prism; The second bonding station includes a first imaging mechanism, a second fixture, a second glue spraying mechanism, and a feeding mechanism. The first imaging mechanism is disposed above the second fixture, and the feeding mechanism and the second glue spraying mechanism are respectively disposed on both sides of the second fixture. The feeding mechanism is fitted with a feeding bracket at its end; The feeding tray is used to hold the projection lens for bonding; The feeding mechanism moves the projection lens to the top of the second fixture, and the second glue spraying mechanism attaches the lens to the three-color light combining prism; The third bonding station is used to bond the microdisplay to the other two sides of the tri-color combining prism. The first adjustment mechanism includes a first bracket and a horizontal sliding module. The horizontal sliding module is disposed on the top of the first bracket. The first glue spraying mechanism and the first photographing mechanism are connected side by side to one side of the horizontal sliding module. Both the first glue spraying mechanism and the first photographing mechanism can slide along the horizontal sliding module. The first glue spraying mechanism is connected to a first movable shaft at its end. The first movable shaft is connected to a first vertical slide plate. A first glue spraying vertical sliding module is connected to one side of the first vertical slide plate. A first horizontal slide plate is connected to one side of the first glue spraying vertical sliding module. The first horizontal slide plate is connected to the horizontal sliding module.

2. The high-precision bonding and alignment device according to claim 1, characterized in that, The first imaging mechanism includes a second support, an imaging fixing plate, and a CCD camera. The imaging fixing plate is mounted on the top of the second support, and a second adjusting block is provided at the end of the imaging fixing plate. A first adjusting block is provided on one side of the second adjusting block, and the CCD camera is provided on one side of the first adjusting block.

3. The high-precision bonding and alignment device according to claim 2, characterized in that, A first adjustment knob is provided on one side of the second adjustment block, which is used to adjust the second adjustment block to slide in the horizontal direction. A second adjustment knob is provided on the other side of the second adjustment block, which is used to adjust the second adjustment block to slide in the vertical direction.

4. The high-precision bonding and alignment device according to claim 3, characterized in that, The feeding mechanism includes a feeding base and a feeding horizontal slider connected to the top of the feeding base. The feeding horizontal slider can slide in a horizontal direction. A feeding fixing plate is provided on the top of the feeding horizontal slider. A first feeding module is provided on one side of the feeding fixing plate. A feeding vertical slider is provided on one side of the first feeding module. A feeding rotating shaft is provided on one side of the feeding vertical slider. A feeding fine-tuning seat is provided at the end of the feeding rotating shaft. The feeding bracket is provided on one side of the feeding fine-tuning seat.

5. The high-precision bonding and alignment device according to claim 1, characterized in that, The second fixture includes a fixture upright plate, a fixture vertical slider is provided on one side of the fixture upright plate, a fixture base plate is provided on one side of the fixture vertical slider, a fixture turntable is provided on the top of the fixture base plate, a second adjustment platform is provided on the top of the fixture turntable, a first adjustment platform is connected to the top of the second adjustment platform, and a fixture support plate is provided on the top of the first adjustment platform.

6. A high-precision bonding and alignment device according to claim 5, characterized in that, Both the first fixture and the second fixture have a curing mechanism on one side.

7. A bonding and alignment method, applied to a high-precision bonding and alignment device according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Place the tri-color combining prism on top of the first fixture, and transport the micro-display to the top of the first fixture via the transport module; S2, the first camera mechanism is adjusted to move to the top of the first fixture through the first adjustment mechanism. When the micro display is moved to the top of the tri-color combining prism through the first camera mechanism, the micro display is aligned and attached to one side of the tri-color combining prism through the glue spraying mechanism. After the camera takes a picture and identifies the center of the micro display and the tri-color combining prism, the alignment is performed during the attachment. S3, place the tri-color combining prism with a micro-display attached to one side on the second fixture, and move the projection lens on the feeding bracket to above the tri-color combining prism through the feeding mechanism; S4. The first imaging mechanism acquires the image generated by the projection lens coinciding with the three-color combining prism, and adjusts the position of the projection lens in real time so that the center of the projection lens coincides with the center of one side of the three-color combining prism. The second adhesive spraying mechanism is used to attach and fix the image, and form an attachment reference. S5, according to the bonding reference, attach the micro-displays to the other two sides of the tri-color combining prism respectively.

8. The bonding and alignment method according to claim 7, characterized in that, After the adhesive is sprayed by the first and second adhesive spraying mechanisms, it is cured by ultraviolet irradiation by the curing mechanism.

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