Splicing method and device of LED direct display projection display screen

Abstract

The invention relates to the technical field of display screens, in particular to a splicing method and device of an LED direct display projection display screen, which are used for accurately adjusting the position of each display unit in an array. According to the splicing method, the positions of the LED display modules are adjusted, so that the LED display modules are arranged in an array mode, meanwhile, adjacent edges of amplified images, projected to a screen, of the LED display modules coincide, and therefore seamless splicing is achieved; a fine adjustment platform is arranged in the splicing device, the minimum adjustment precision can reach 0.02 mm, the positions of the LED display modules are finely adjusted through the fine adjustment platform, and the coincidence precision of the adjacent edges of the amplified image can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and in particular to a method and device for splicing an LED direct projection display screen. Background Art

[0002] LED direct projection display screen is mainly composed of display unit, imaging unit and driving unit. Figure 2 , wherein the display unit includes a display source and a projection lens, the display source is used to emit light and form an image, the projection lens is used to amplify the image formed by the display source to form an enlarged image, the imaging unit includes a screen for displaying the enlarged image, and the driving unit includes a driving IC for controlling the working state of the display source. When displaying, the enlarged images projected onto the screen are spliced ​​to obtain a complete display image.

[0003] In order to facilitate the assembly of the above-mentioned LED direct projection display screen, an LED display module is prepared in advance, which integrates the display source and the projection lens in the same module. The LED display modules are arranged in an array so that the enlarged image can be seamlessly spliced ​​on the screen, and an LED direct projection display screen can be obtained, such as an LED direct projection display screen and LED display module applied by our company. However, it is found in the actual assembly process that if the position accuracy of the LED display module in the array is poor, splicing errors are likely to occur, resulting in the inability to accurately splice the enlarged image projected to the screen, and thus the inability to obtain a complete display image.

[0004] Based on the above reasons, the present application proposes a method and device for splicing an LED direct display projection screen. Summary of the invention

[0005] One object of the present invention is to provide a method for splicing an LED direct projection display screen, and the technical solution adopted is as follows: A method for splicing an LED direct display projection screen, wherein the LED direct display projection screen comprises an LED display module and an imaging unit, wherein the LED display module comprises a display source and a projection lens, wherein the display source is used to emit light and form an image, wherein the projection lens is used to amplify the image formed by the display source to form an amplified image, and wherein the imaging unit comprises a screen for displaying the amplified image; Characterized in that the splicing method comprises: The positions of the LED display modules are adjusted so that the LED display modules are distributed in an array and adjacent edges of the enlarged image overlap when projected onto the screen.

[0006] It is further characterized in that the positions of the LED display modules are adjusted so that the LED display modules are distributed in an array and adjacent edges of the enlarged image overlap when projected onto the screen, including: S1. Divide the LED display module into a reference display module and a peripheral display module, wherein the peripheral display module includes a first peripheral display module, a second peripheral display module, ... an Mth peripheral display module, where M is a positive integer and M<N. The LED display module adjacent to the reference display module is the first peripheral display module, the LED display module adjacent to the first peripheral display module is the second peripheral display module, and so on. The LED display module adjacent to the M-1th peripheral module is the Mth peripheral display module; the enlarged image projected onto the screen by the reference display module is the reference enlarged image, the enlarged image projected onto the screen by the first peripheral display module is the first enlarged image, the enlarged image projected onto the screen by the second peripheral display module is the second enlarged image, and so on. The enlarged image projected onto the screen by the Mth peripheral display module is the Mth enlarged image; S2, determining a reference position: taking the position of the reference display module and the position of the reference magnified image as the reference position; S3, adjusting the first peripheral display module based on the reference position so that the first enlarged image overlaps with adjacent edges of the reference enlarged image; S4, adjusting the second peripheral display module so that the second enlarged image overlaps with adjacent edges of the first enlarged image; Adjust in sequence, S5. Adjust the Mth peripheral display module to make the adjacent edges of the Mth enlarged image overlap with the adjacent edges of the M-1th enlarged image.

[0007] Another object of the present application is to provide a splicing device of an LED direct display projection screen, which is used to implement the above-mentioned splicing method. The LED direct display projection screen includes an LED display module and an imaging unit. The LED display module includes a display source and a projection lens. The display source is used to emit light and form an image. The projection lens is used to enlarge the image formed by the display source to form an enlarged image. The imaging unit includes a screen for displaying the enlarged image. The device includes: A screen placement area, wherein the screen placement area is used to place the screen; The fine-tuning platform is used to adjust the position of the LED display module so that the LED display module array is distributed and adjacent edges of the enlarged image overlap when projected onto the screen. During the adjustment process, the fine-tuning platform corresponds to the screen placement area.

[0008] Its further characteristic is that The device also includes a bearing plate placement area, which is used to place the first bearing plate. During adjustment, the bearing plate placement area, the fine-tuning platform, and the screen placement area are distributed in sequence from bottom to top.

[0009] Furthermore, the LED display module further includes a second carrier board, which is used to carry the display source and the projection lens and to connect to the first carrier board. The display source is mounted on the second carrier board, and the projection lens is mounted on the second carrier board through a lens mount.

[0010] Furthermore, the display source includes a blue light chip and a filter. The filter covers the light-emitting surface of the blue light chip. The blue light emitted by the blue light chip is subjected to color conversion by the filter to form a number of pixels. Each pixel includes red light, green light, and blue light, which are a red light area, a green light area, and a blue light area, respectively.

[0011] Furthermore, the red light area, the green light area, and the blue light area are arranged in a "pin" shape, or the red light area, the green light area, and the blue light area are arranged in sequence from left to right.

[0012] Furthermore, the blue light emitted by the blue light chip is converted into a number of pixels by the filter. Each pixel includes a red light area, two green light areas, and a blue light area. The red light area, the green light area, and the blue light area are arranged in a rectangular shape.

[0013] Furthermore, the device further includes a mount. The carrier board placement area includes a through groove opened in the middle of the bottom end of the mount. The first carrier board is installed in the through groove, and the top end of the first carrier board corresponds to the bottom end of the LED display module.

[0014] Furthermore, the screen placement area includes a number of first support rods arranged in a rectangular shape. The bottom ends of the first support rods are installed at the top edge of the mount. First mounting holes are opened at the edge of the screen, and the first mounting holes correspond to the top ends of the first support rods. During adjustment, the first support rods are correspondingly installed with the first mounting holes, and the screen is placed horizontally.

[0015] Furthermore, the device further includes a substrate placement area, which is used to place the substrate. The substrate placement area includes a number of second support rods arranged in a rectangular shape. The top ends of the second support rods are installed at the bottom edge of the mount. Second mounting holes are opened at the edge of the substrate, and the second mounting holes correspond to the top ends of the second support rods. During adjustment, the second support rods are correspondingly installed with the second mounting holes, and the substrate is placed horizontally.

[0016] Furthermore, the fine-tuning platform includes an X-axis fine-tuning platform, a Y-axis fine-tuning platform, and a limit assembly; the X-axis fine-tuning platform is installed on the Y-axis fine-tuning platform, and the limit assembly is installed on the X-axis fine-tuning platform. When implementing X-axis adjustment, the X-axis fine-tuning platform drives the limit assembly to move along the X-axis direction, and when implementing Y-axis adjustment, the Y-axis fine-tuning platform drives the X-axis fine-tuning platform and the limit assembly to move along the Y-axis direction; the limit assembly is used to clamp the LED display module and drive the LED display module to move. After the adjustment is completed, it is used to lock the LED display module with the first supporting plate.

[0017] Furthermore, the limiting assembly includes a bracket, a supporting block installed on the bracket, and a locking block installed below the supporting block. During adjustment, the LED display module is installed below the locking block. After the adjustment is completed, the locking block moves downward, driving the LED display module to move toward the first supporting plate, so that the bottom end of the second supporting plate is fitted with the top end of the substrate.

[0018] Furthermore, the support block and the locking block are connected by a pressing rod and a sliding assembly, one end of the pressing rod is fixedly connected to the top end of the locking block, and the other end passes through the support block and is slidably connected to the support block, and the sliding assembly is installed on both sides of the support block and the locking block, including a connecting rod, a slideway opened in the middle of the connecting rod, and a first limit block installed on both side ends of the support block and slidably connected to the slideway, and the bottom end of the connecting rod is connected to the side end of the support block.

[0019] Furthermore, a mounting hole is provided at the edge of the support block, a first threaded hole is provided at the edge of the locking block, and a second threaded hole is provided at the edge of the lens mounting seat. When the LED display module is locked with the locking block, the mounting hole, the first threaded hole, and the second threaded hole correspond in sequence from top to bottom, and the working end of the screwing tool passes through the mounting hole to screw the bolt into the first threaded hole and the second threaded hole.

[0020] Furthermore, a second light-transmitting hole is provided in the middle of the locking block and the supporting block, one end of the second light-transmitting hole corresponds to the light-emitting end of the projection lens, and the other end corresponds to the screen.

[0021] The position of the LED display module is adjusted by the device, and the steps include: S1. Divide the LED display module into a reference display module and a peripheral display module, wherein the peripheral display module includes a first peripheral display module, a second peripheral display module, ... an Mth peripheral display module, where M is a positive integer and M<N. The LED display module adjacent to the reference display module is the first peripheral display module, the LED display module adjacent to the first peripheral display module is the second peripheral display module, and so on. The LED display module adjacent to the M-1th peripheral module is the Mth peripheral display module; the enlarged image projected onto the screen by the reference display module is the reference enlarged image, the enlarged image projected onto the screen by the first peripheral display module is the first enlarged image, the enlarged image projected onto the screen by the second peripheral display module is the second enlarged image, and so on. The enlarged image projected onto the screen by the Mth peripheral display module is the Mth enlarged image; S2, determining a reference position, including: S21, distributing the first carrier board, the reference display module, and the screen in sequence from bottom to top; S22, projecting the reference magnified image generated by the reference display module onto the screen, adjusting the reference display module to an initial position through the fine-tuning platform, and the position of the reference display module and the reference magnified image is the reference position; S3, taking the reference position as a reference, adjusting the first peripheral display module through the fine-tuning platform so that the first enlarged image overlaps with adjacent edges of the reference enlarged image; S4, adjusting the second peripheral display module through the fine-tuning platform so that the second enlarged image overlaps with adjacent edges of the first enlarged image; Adjust in sequence, S5. Adjust the Mth peripheral display module through the fine-tuning platform so that the adjacent edges of the Mth enlarged image and the M-1th enlarged image overlap.

[0022] Furthermore, step S21 includes: placing the first carrier plate in the carrier plate placement area; Installing the reference display module on the fine-tuning platform; The screen is placed in the screen placement area.

[0023] Furthermore, step S3 includes: S31, moving the screen to expose the fine-tuning platform; S32, installing one of the first peripheral display modules on the fine-tuning platform; S33, distributing the first carrying board, the first peripheral display module, and the screen in sequence from bottom to top; S34, projecting the first enlarged image generated by the first peripheral display module onto the screen, and adjusting the position of the first peripheral display module through the fine-tuning platform so that the first enlarged image overlaps with adjacent edges of the reference enlarged image; Steps S31 to S34 are repeated to adjust the positions of the remaining first peripheral display modules.

[0024] Further, step S4 includes: S41, moving the screen to expose the fine-tuning platform; S42, installing one of the second peripheral display modules on the fine-tuning platform; S43, distributing the first carrying board, the second peripheral display module, and the screen in sequence from bottom to top; S44, projecting the second enlarged image generated by the second peripheral display module onto the screen, and adjusting the position of the second peripheral display module through the fine-tuning platform so that the second enlarged image overlaps with adjacent edges of the first enlarged image; Steps S41 to S44 are repeated to adjust the positions of the remaining second peripheral display modules.

[0025] Further, step S5 includes: S51, moving the screen to expose the fine-tuning platform; S52, installing one of the Mth peripheral display modules on the fine-tuning platform; S53, distributing the first carrying board, the Mth peripheral display module, and the screen in sequence from bottom to top; S54, projecting the second enlarged image generated by the Mth peripheral display module onto the screen, and adjusting the position of the Mth peripheral display module through the fine-tuning platform so that the second enlarged image overlaps with adjacent edges of the first enlarged image; Steps S51 to S54 are looped to adjust the positions of the remaining M-th peripheral display modules.

[0026] The above scheme of the present invention can achieve the following beneficial effects: In the LED direct display projection screen splicing method of the present application, by adjusting the position of the LED display module, the LED display module array is arranged, and the adjacent edges of the enlarged image projected to the screen by the LED display module overlap, thereby achieving seamless splicing. In this method, the position of the LED display module is adjusted according to the splicing effect, which effectively reduces the splicing error and ensures that the enlarged image projected to the screen can be accurately spliced, thereby obtaining a complete display image. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the LED direct projection display screen of the present invention (the substrate is omitted); Figure 2 This is a schematic diagram of the main structure of the LED direct projection display screen of the present invention; Figure 3 It is a schematic diagram of the top view structure of the display source in the LED direct display projection screen of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the LED display module in the LED direct projection display screen of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the LED direct projection display screen splicing device of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure after the screen and the substrate are placed in the LED direct display projection screen splicing device of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the LED display module of the present invention installed on the fine-tuning platform; Figure 8 It is a schematic diagram of the three-dimensional structure of the LED direct projection display screen splicing device of the present invention from another angle; Fig. 9 It is a schematic diagram of the structure after the projection image of the present invention is projected onto the screen.

[0028] Reference numerals: display source 1, screen 2, second carrier plate 3, lens mounting seat 4, first carrier plate 5, screen placement area 6, fine-tuning platform 7, carrier plate placement area 8, substrate placement area 9, mounting seat 10, through slot 11, substrate 12, FPC connector 13; Red light region 101, green light region 102, blue light region 103; A reference enlarged image 200, a first enlarged image 201, a second enlarged image 202, and an Mth enlarged image 20m; First light transmission hole 401; X-axis fine-tuning platform 701, Y-axis fine-tuning platform 702, X-axis micrometer knob 703, Y-axis micrometer knob 704; The bracket 731 , the supporting block 732 , the locking block 733 , the pressing rod 734 , the connecting rod 735 , the slideway 736 , the limiting block 737 , and the second light-transmitting hole 738 . DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that in the description and claims of the present invention and the above-mentioned drawings, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0031] This application is used to realize the array assembly of the LED display module in the LED direct-view projection display screen. Refer to Figure 1 , Figure 2 , the LED direct-view projection display screen mainly consists of a display unit, an imaging unit, and a driving unit. Among them, the display unit includes a display source 1 and a projection lens. The display source 1 is used to emit light and form an image. In this embodiment, the display source 1 includes a blue light chip and a filter. The blue light chip is an LED integrated chip that emits blue light. The LED integrated chip is composed of a plurality of light-emitting bodies arranged in an array, and the light-emitting body is a Micro LED. The filter includes quantum dots and covers the light-emitting surface of the blue light chip. The blue light emitted by the blue light chip is converted into red light, green light, and blue light after the light color conversion by the filter. Each pixel includes a red light area 101, a green light area 102, and a blue light area 103. The red light area 101, the green light area 102, and the blue light area 103 are distributed in sequence from left to right, and the light colors are mixed to form an image of the required color (such as white).

[0032] It should be noted that when designing, the filter used in the display source 1 can be set according to actual needs. In another embodiment, after the blue light emitted by the blue light chip in the display source 1 is converted by the filter, the red light area 101, the green light area 102, and the blue light area 103 are arranged in a "pin" shape, or the blue light emitted by the blue light chip in the display source 1 is converted into a number of pixels by the filter. Each pixel includes a red light area 101, two green light areas 102, and a blue light area 103. The red light area 101, the green light area 102, and the blue light area 103 are arranged in a rectangular shape. Refer to Figure 3 .

[0033] The projection lens is arranged in one-to-one correspondence with the display source 1 and is used to magnify the image formed by the display source 1 to form a magnified image. In this embodiment, a general-purpose macro lens in the industry is directly applied. For example, the length and width of the display source 1 are 5.76 mm and 3.24 mm respectively, the focal length of the macro lens is 1 mm to 5 mm, preferably 1.5 mm, the diameter is 6 mm, and the magnification is 1 times to 5 times, preferably 5 times. The main camera lens of Xiaomi 10 pro was used in the experimental development stage. In actual application, a macro lens with the same function from other manufacturers can also be used to achieve the same effect.

[0034] The specific arrangement of the display source, projection lens and screen is as follows: the display source is located at the object end of the projection lens, corresponding to the light incident end of the projection lens; the screen is located at the image end of the projection lens, corresponding to the light output end of the projection lens.

[0035] The imaging unit includes a screen 2 for displaying an enlarged image. The driving unit includes a driving IC, which is electrically connected to the blue light chip in the display source 1 through a circuit in a PCB board and an FPC connector, and is used to control the working state of the display source 1.

[0036] In order to facilitate the assembly of the above-mentioned LED direct display projection screen, an LED display module is prepared in advance. In this embodiment, the display source 1 is first installed on the second carrier board 3, and then the projection lens is installed on the second carrier board 3 through the lens mounting seat 4 (or the projection lens is directly installed on the second carrier board 3 by mounting), and the display source 1 is located at the object end of the projection lens, thereby obtaining the LED display module. Figure 4 The projection lens mounting seat 4 comprises a shell, and first light-transmitting holes 401 are respectively provided at the top and bottom of the shell. The provision of the first light-transmitting holes 401 facilitates light entry and light exit of the projection lens.

[0037] The second carrier plate 3 is provided to facilitate the connection of the display unit with other components (such as the first carrier plate 5). In this embodiment, the second carrier plate 3 is fixedly connected to the first carrier plate 5 by bolts. N LED display modules are arranged in an array structure on the first carrier plate 5 so that the enlarged images generated by the LED display modules are seamlessly spliced ​​on the screen 2, and an LED direct display projection screen can be obtained. N is a positive integer. In this embodiment, N is 36, and the LED display modules are arranged in a 6*6 array structure.

[0038] The LED integrated chip in the display source is electrically connected to the circuit in the PCB board (i.e., substrate) through the FPC connector 13. To facilitate the electrical connection between the LED integrated chip and the PCB board, a threading hole is provided in the first carrier board 5. The two ends of the FPC connector 13 pass through the threading holes and are electrically connected to the LED integrated chip and the PCB board respectively. The FPC connector 13 is a flexible printed circuit board.

[0039] During the assembly process, the position of the LED display module must be accurate to ensure seamless splicing between the enlarged images projected by the LED display module to the screen. The following discloses two specific embodiments of the splicing method of LED direct display projection screens, which are used to accurately adjust the position of the LED display modules in the array. Embodiment 1

[0040] A method for splicing an LED direct projection display screen, the specific steps of the splicing method comprising: S1. Divide the LED display module into a reference display module and a peripheral display module, wherein the peripheral display module includes a first peripheral display module, a second peripheral display module, ... an Mth peripheral display module, where M is a positive integer and M<N. In this embodiment, M is 35. The LED display module adjacent to the reference display module is the first peripheral display module, the LED display module adjacent to the first peripheral display module is the second peripheral display module, and so on. The LED display module adjacent to the M-1th peripheral module is the Mth peripheral display module; the enlarged image projected onto the screen by the reference display module is the reference enlarged image 200, the enlarged image projected onto the screen by the first peripheral display module is the first enlarged image 201, the enlarged image projected onto the screen by the second peripheral display module is the second enlarged image 202, and so on. The enlarged image projected onto the screen by the Mth peripheral display module is the Mth enlarged image 20m; S2, determining a reference position: taking the position of the reference display module and the position of the reference magnified image as the reference position; S3, adjusting the first peripheral display module based on the reference position so that the adjacent edges of the first enlarged image 201 and the reference enlarged image 200 overlap; S4, adjusting the second peripheral display module so that the second enlarged image 202 overlaps with adjacent edges of the first enlarged image 201; Adjust in sequence, S5, adjusting the Mth peripheral display module so that the adjacent edges of the Mth enlarged image 20m and the M-1th enlarged image overlap, referring to Fig. 9 ; This enables the array arrangement of LED display modules and the seamless splicing of enlarged images on the screen. Embodiment 2

[0041] In order to realize seamless splicing of LED direct display projection screens, this embodiment 2 provides a splicing device for LED direct display projection screens, referring to Figure 5~Figure 8 The splicing device includes: a screen placement area 6 and a fine-tuning platform 7. The screen placement area 6 is used to place the screen 2, and the fine-tuning platform 7 is used to adjust the position of the LED display module so that the enlarged image generated by the LED display module can be accurately spliced ​​when projected onto the screen 2.

[0042] The splicing device is mainly used in the position adjustment process of the LED display module. In order to facilitate the transfer of the array-distributed LED display modules after the adjustment is completed, a first carrier plate 5 is provided in the LED direct display projection screen, and a carrier plate placement area 8 for placing the first carrier plate 5 is provided in the device. The LED display modules that have been adjusted and distributed in the array are installed on the first carrier plate 5; during adjustment, the carrier plate placement area 8, the fine-tuning platform 7, and the screen placement area 6 are distributed in sequence from bottom to top.

[0043] To facilitate the installation of the first carrier board 5, the carrier board placement area 8 is designed as the following structure: a mounting seat 10 is provided, a through groove 11 is opened in the middle of the bottom end of the mounting seat 10, and the first carrier board 5 is installed in the through groove 11, and the top end of the first carrier board 5 corresponds to the bottom end of the second carrier board 3 in the LED display module.

[0044] The specific structure of the screen placement area 6 includes: four first support rods distributed in a rectangular shape, the bottom end of the first support rod 601 is fixed to the top edge of the mounting base 10, and a first mounting hole is opened on the edge of the screen 2, and the first mounting hole corresponds to the top of the first support rod. When adjusting, the screen 2 is installed on the first support rod through the first mounting hole, and the screen 2 is placed horizontally.

[0045] It should be noted that, in another embodiment, in order to facilitate the testing of the working state of the LED display module, a substrate placement area 9 is also provided in the device. The substrate placement area 9 is used to place the substrate 12 (i.e., the PCB board). The first carrier plate 5 is provided with a plurality of threading grooves 501. Both ends of the FPC connector 13 pass through the threading grooves 501, one end is electrically connected to the LED integrated chip, and the other end is electrically connected to the PCB board. The substrate placement area 9 includes four second support rods distributed in a rectangular shape. The top end of the second support rod is fixed to the bottom edge of the mounting seat 10. The edge of the substrate 12 is provided with a second mounting hole. The second mounting hole corresponds to the top end of the second support rod. When adjusting, the substrate 12 is mounted on the second support rod through the second mounting hole, and the substrate 12 is placed horizontally.

[0046] refer to Figure 8 The specific structure of the fine-tuning platform 7 includes an X-axis fine-tuning platform 701, a Y-axis fine-tuning platform 702, and a limit assembly. The X-axis fine-tuning platform 701 is installed on the Y-axis fine-tuning platform 702, and the limit assembly is installed on the X-axis fine-tuning platform 701. The X-axis fine-tuning platform 701 is used to realize the X-direction adjustment of the LED display module, and the Y-axis fine-tuning platform 702 is used to realize the Y-direction adjustment of the LED display module. The limit assembly is used to clamp the LED display module, and together with the X-axis fine-tuning platform 701 and the Y-axis fine-tuning platform 702, the LED display module is driven to move. After the adjustment is completed, the LED display module is locked with the first carrier plate 5 through the limit assembly.

[0047] It should be noted that, in another embodiment, the fine-tuning platform 7 not only includes the X-axis fine-tuning platform 701, the Y-axis fine-tuning platform 702, and the limit assembly, but also includes an angle fine-tuning platform (not shown in the figure), which is used to realize the horizontal angle adjustment of the LED display module. The X-axis fine-tuning platform 701 and the Y-axis fine-tuning platform 702 are both installed on the angle fine-tuning platform, the X-axis fine-tuning platform 701 is installed on the Y-axis fine-tuning platform 702, and the limit assembly is installed on the X-axis fine-tuning platform 701.

[0048] In order to prevent the fine-tuning platform from driving the LED display module to move and causing relative displacement and affecting the adjustment accuracy, the present embodiment sets the limit assembly to the following structure: the limit assembly includes a bracket 731, a support block 732 installed in the middle of the bracket 731, and a locking block 733 installed below the support block 732. Both ends of the bracket 731 are installed on the X-axis fine-tuning platform 701. The support block 732 and the locking block 733 are connected by a pressing rod 734 and a sliding assembly. One end of the pressing rod 734 is fixedly connected to the top of the locking block 733, and the other end passes through the support block 732 and is slidably connected to the support block 732. The sliding assembly is installed on both sides of the support block 732 and the locking block 733, including a connecting rod 735, a slideway 736 opened in the middle of the connecting rod 735, and a limit block 737 installed on both sides of the support block 732 and slidably connected to the slideway 736. The bottom end of the connecting rod 735 is fixedly connected to the side end of the locking block 733.

[0049] A second light-transmitting hole 738 is formed in the middle of the locking block 733 and the supporting block 732 . One end of the second light-transmitting hole 738 corresponds to the light-emitting end of the projection lens, and the other end corresponds to the screen 2 .

[0050] In order to facilitate the installation of the LED display module under the locking block 733, a mounting hole is opened on the edge of the support block 732, a first threaded hole is opened on the edge of the locking block 733, and a second threaded hole is opened on the edge of the lens mounting seat 4. When locking, the working end of the screwing tool passes through the mounting hole, and the bolt is screwed into the first threaded hole and the second threaded hole to achieve the locking of the LED display module and the locking block 733.

[0051] During adjustment, the LED display module is installed below the locking block 733 in the above manner. When adjusting the X-axis, the X-axis micrometer knob 703 is turned, and the X-axis fine-tuning platform 701 drives the limit assembly to move along the X-axis direction; when adjusting the Y-axis, the Y-axis micrometer button 704 is turned, and the Y-axis fine-tuning platform 702 drives the X-axis fine-tuning platform 701 and the limit assembly to move along the Y-axis direction. Both the X-axis fine-tuning platform and the Y-axis fine-tuning platform can adopt existing technologies.

[0052] The position of the LED display module is adjusted using the above device, and the specific steps include: S1. Divide the LED display module into a reference display module and a peripheral display module, wherein the peripheral display module includes a first peripheral display module, a second peripheral display module, ... an Mth peripheral display module, where M is a positive integer and M<N. In this embodiment, M is 35. The LED display module adjacent to the reference display module is the first peripheral display module, the LED display module adjacent to the first peripheral display module is the second peripheral display module, and so on. The LED display module adjacent to the M-1th peripheral module is the Mth peripheral display module. The enlarged image projected onto the screen by the reference display module is the reference enlarged image 200, the enlarged image projected onto the screen by the first peripheral display module is the first enlarged image 201, the enlarged image projected onto the screen by the second peripheral display module is the second enlarged image 202, and so on. The enlarged image projected onto the screen by the Mth peripheral display module is the Mth enlarged image 20m. S2, determining the reference position, including: S21, distributing the first carrier board 5, the reference display module, and the screen 2 from bottom to top, specifically including: S211, installing the first carrier board 5 in the carrier board placement area 8; S212, installing the reference display module on the fine-tuning platform 7, specifically, locking the reference display module and the locking block 733 by means of a limiter assembly; S213, installing the screen 2 on the first support rod of the screen placement area 6; S214, installing the substrate 12 on the second support rod of the substrate placement area 9; S22, the reference magnified image generated by the reference display module is projected onto the screen 2, and the reference display module is adjusted to the initial position by the fine-tuning platform 7. At this time, the position of the reference display module and the reference magnified image 200 is the reference position.

[0053] S3, taking the reference position as a reference, adjusting the first peripheral display module through the fine-tuning platform 7 so that the first enlarged image 201 and the adjacent edges of the reference enlarged image 200 overlap, specifically including: S31, moving the screen 2 to expose the fine-tuning platform 7; S32, installing one of the first peripheral display modules on the fine-tuning platform 7, specifically, locking the first peripheral display module and the locking block 733 by means of a limiting assembly; S33, installing the screen 2 on the second support rod of the screen placement area 6, so that the substrate 12, the first supporting plate 5, the first peripheral display module, and the screen 2 are arranged in sequence from bottom to top; S34, the first enlarged image 201 generated by the first peripheral display module is projected onto the screen 2, and the first peripheral display module is adjusted by the fine-tuning platform 7 so that the first enlarged image 201 and the adjacent edges of the reference enlarged image 200 overlap; Steps S31 to S34 are repeated to adjust the positions of the remaining first peripheral display modules.

[0054] S4, adjusting the second peripheral display module by the fine-tuning platform 7 so that the second enlarged image 202 overlaps with the adjacent edges of the first enlarged image 201, specifically including: S41, moving screen 2 to expose the fine-tuning platform; S42, installing one of the second peripheral display modules on the fine-tuning platform 7; S43, installing the screen 2 on the second support rod of the screen placement area 6, so that the substrate 12, the first supporting plate 5, the second peripheral display module, and the screen 2 are arranged in sequence from bottom to top; S44, the second enlarged image generated by the second peripheral display module is projected onto the screen 2, and the second peripheral display module is adjusted by the fine-tuning platform 7 so that the second enlarged image 202 overlaps with the adjacent edges of the first enlarged image 201; Steps S41 to S44 are repeated to adjust the positions of the remaining second peripheral display modules.

[0055] S5, adjusting the Mth peripheral display module through the fine-tuning platform 7 so that the adjacent edges of the Mth enlarged image 20m and the M-1th enlarged image coincide with each other, specifically including: S51, moving the screen 2 to expose the fine-tuning platform 7; S52, installing one of the Mth peripheral display modules on the fine-tuning platform 7; S53, installing the screen 2 on the second support rod of the screen placement area 6, so that the first supporting plate 5, the Mth peripheral display module, and the screen 2 are arranged in sequence from bottom to top; S54, the second enlarged image 202 generated by the Mth peripheral display module is projected onto the screen 2, and the Mth peripheral display module is adjusted by the fine-tuning platform 7 so that the second enlarged image 202 overlaps with the adjacent edges of the first enlarged image 201; Steps S51 to S54 are looped to adjust the positions of the remaining M-th peripheral display modules.

[0056] Thus, the LED display modules are arranged in an array, and the enlarged image is seamlessly spliced ​​on the screen 2. Fig. 9 .

[0057] In the above steps S22, S34, S44, and S54, after the adjustment is completed, the pressing rod 734 is pressed, and the pressing rod 734 drives the locking block 733 to move downward, and the locking block 733 drives the LED display module to move toward the first supporting plate 5, so that the bottom end of the second supporting plate 3 is in contact with the top end of the first supporting plate 5.

[0058] A third threaded hole is provided at the edge of the second carrier plate 3 , and a fourth threaded hole is provided at the edge of the first carrier plate 5 . Bolts penetrate the third threaded hole and the fourth threaded hole to fix the second carrier plate 3 to the first carrier plate 5 , thereby installing the LED display module in the first carrier plate 5 .

[0059] The fine-tuning platform in the adjustment device of the present application has an adjustment accuracy of at least 0.02 mm. The position of the LED display module is fine-tuned by the fine-tuning platform so that adjacent edges of the enlarged image on the screen overlap, thereby achieving precise adjustment of the position of the LED display module, that is, achieving precise adjustment of the position of the display unit, which is beneficial to improving the overlap accuracy of adjacent edges of the enlarged image.

[0060] The device of the present application is mainly used in the process of position adjustment of the LED display module. After the position adjustment of the LED display module is completed and installed on the first supporting plate, the first supporting plate and the LED display modules arrayed thereon are used as components of the LED direct display projection display screen, and then reassembled with the disassembled screen and substrate to form an LED direct display projection display screen.

[0061] In addition, while realizing the position adjustment of the LED display module, the device facilitates the test of the electrical connection effect between the PCB board and the LED display source, that is, a preliminary electrical performance test is performed before the LED direct display projection screen is fully assembled, which is conducive to further improving the product yield.

[0062] It is understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A method for splicing an LED direct display projection screen, the LED direct display projection screen comprising an LED display module and an imaging unit, the LED display module comprising a display source (1) and a projection lens, the display source (1) being used to emit light and form an image, the projection lens being used to amplify the image formed by the display source (1) to form an amplified image, the imaging unit comprising a screen (2) being used to display the amplified image; It is characterized in that Splicing methods include: The positions of the LED display modules are adjusted so that the LED display modules are distributed in an array and adjacent edges of the enlarged image overlap when it is projected onto the screen (2).

2. The method for splicing an LED direct projection display screen according to claim 1, characterized in that: The method of making adjacent edges of the enlarged image coincide when projecting the enlarged image onto the screen comprises: S1. Divide the LED display module into a reference display module and a peripheral display module, wherein the peripheral display module includes a first peripheral display module, a second peripheral display module, ... an Mth peripheral display module, where M is a positive integer and M<N. The LED display module adjacent to the reference display module is the first peripheral display module, the LED display module adjacent to the first peripheral display module is the second peripheral display module, and so on. The LED display module adjacent to the M-1th peripheral module is the Mth peripheral display module; the enlarged image projected onto the screen (2) by the reference display module is the reference enlarged image (200), the enlarged image projected onto the screen (2) by the first peripheral display module is the first enlarged image (201), the enlarged image projected onto the screen (2) by the second peripheral display module is the second enlarged image (202), and so on. The enlarged image projected onto the screen (2) by the Mth peripheral display module is the Mth enlarged image (20m); S2, determining a reference position: taking the position of the reference display module and the position of the reference magnified image (200) as the reference position; S3, adjusting the first peripheral display module based on the reference position so that the first enlarged image (201) and the adjacent edges of the reference enlarged image (200) overlap; S4, adjusting the second peripheral display module so that the second enlarged image (202) and the adjacent edges of the first enlarged image (201) overlap; Adjust in sequence, S5. Adjust the Mth peripheral display module so that the adjacent edges of the Mth enlarged image (20m) and the M-1th enlarged image overlap.

3. A splicing device for an LED direct display projection screen, used to implement the splicing method of the LED direct display projection screen according to claim 1, wherein the LED direct display projection screen comprises an LED display module and an imaging unit, wherein the LED display module comprises a display source (1) and a projection lens, wherein the display source (1) is used to emit light and form an image, wherein the projection lens is used to amplify the image formed by the display source (1) to form an amplified image, and wherein the imaging unit comprises a screen (2) for displaying the amplified image; wherein the device ... The device comprises: A screen placement area (6), wherein the screen placement area (6) is used to place the screen (2); The fine-tuning platform (7) is used to adjust the position of the LED display module so that the LED display module array is distributed and adjacent edges of the enlarged image overlap when projected onto the screen (2). During the adjustment process, the fine-tuning platform (7) corresponds to the screen placement area (6).

4. The LED direct projection display screen splicing device according to claim 3, characterized in that: The device further comprises a bearing plate placement area (8), wherein the bearing plate placement area (8) is used to place the first bearing plate (5), and during adjustment, the bearing plate placement area (8), the fine-tuning platform (7), and the screen placement area (6) are arranged in sequence from bottom to top.

5. The LED direct projection display screen splicing device according to claim 4, characterized in that: The device further comprises a mounting seat (10), the bearing plate placement area (8) comprising: a through slot opened in the middle of the bottom end of the mounting seat (10), the first bearing plate (5) being mounted in the through slot, the top end of the first bearing plate (5) corresponding to the bottom end of the LED display module.

6. The splicing device of the LED direct display projection screen according to claim 5, characterized in that: The screen placement area (6) comprises a plurality of first support rods distributed in a rectangular shape, the bottom ends of the first support rods being mounted on the top edge of the mounting seat (10), the edge of the screen (2) being provided with first mounting holes, the first mounting holes corresponding to the top ends of the first support rods, and when adjusting, the first support rods are mounted corresponding to the first mounting holes, and the screen (2) is placed horizontally.

7. The splicing device of the LED direct display projection screen according to claim 6, characterized in that: The device further comprises a substrate placement area (9), wherein the substrate placement area (9) is used to place the substrate (12), and the substrate placement area (9) comprises a plurality of second support rods distributed in a rectangular shape, wherein the top ends of the second support rods are mounted on the bottom edges of the mounting seat (10), and a second mounting hole is provided on the edge of the substrate (12), wherein the second mounting hole corresponds to the top ends of the second support rods, and when adjusting, the second support rods are mounted corresponding to the second mounting holes, and the substrate (12) is placed horizontally.

8. The splicing device of the LED direct display projection screen according to claim 7, characterized in that: The fine-tuning platform (7) comprises an X-axis fine-tuning platform (701), a Y-axis fine-tuning platform (702), and a limit assembly; the X-axis fine-tuning platform (701) is mounted on the Y-axis fine-tuning platform (702), and the limit assembly is mounted on the X-axis fine-tuning platform (701); when adjusting the X-axis, the X-axis fine-tuning platform (701) drives the limit assembly to move along the X-axis direction; when adjusting the Y-axis, the Y-axis fine-tuning platform (702) drives the X-axis fine-tuning platform (701) and the limit assembly to move along the Y-axis direction; the limit assembly is used to clamp the LED display module and drive the The LED display module moves, and after adjustment is completed, the limiting assembly is used to lock the LED display module with the first carrier plate (5); the limiting assembly comprises a bracket (731), a support block (732) installed on the bracket (731), and a locking block (733) installed below the support block (732); during adjustment, the LED display module is installed below the locking block (733); after adjustment is completed, the locking block (733) moves downward, driving the LED display module to move toward the first carrier plate (5), so that the bottom end of the second carrier plate (3) fits with the top end of the substrate (12).

9. The splicing device of the LED direct display projection screen according to claim 8, characterized in that: The support block (732) and the locking block (733) are connected via a pressing rod (734) and a sliding assembly. One end of the pressing rod (734) is fixedly connected to the top end of the locking block (733), and the other end passes through the support block (732) and is slidably connected to the support block (732). The sliding assembly is installed on both sides of the support block (732) and the locking block (733), and comprises a connecting rod (735), a slideway (736) provided in the middle of the connecting rod (735), and a limit block (737) installed at both side ends of the support block (732) and slidably connected to the slideway (736). The bottom end of the connecting rod (735) is connected to the side end of the support block (735). The middle of the locking block (733) and the support block (732) are both provided with a second light-transmitting hole (738). One end of the second light-transmitting hole (738) corresponds to the light-emitting end of the projection lens, and the other end corresponds to the screen (2).

10. The LED direct display projection screen splicing device according to any one of claims 3 to 9, characterized in that: The position of the LED display module is adjusted by the device, and the steps include: S1. Divide the LED display module into a reference display module and a peripheral display module, wherein the peripheral display module includes a first peripheral display module, a second peripheral display module, ... an Mth peripheral display module, where M is a positive integer and M<N. The LED display module adjacent to the reference display module is the first peripheral display module, the LED display module adjacent to the first peripheral display module is the second peripheral display module, and so on. The LED display module adjacent to the M-1th peripheral module is the Mth peripheral display module; the enlarged image projected onto the screen (2) by the reference display module is the reference enlarged image (200), the enlarged image projected onto the screen (2) by the first peripheral display module is the first enlarged image (201), the enlarged image projected onto the screen (2) by the second peripheral display module is the second enlarged image (202), and so on. The enlarged image projected onto the screen (2) by the Mth peripheral display module is the Mth enlarged image (20m); S2, determining a reference position, comprising: S21, distributing the first carrier board (5), the reference display module, and the screen (2) in order from bottom to top; S22, projecting the reference magnified image generated by the reference display module onto the screen (2), adjusting the reference display module to an initial position via the fine-tuning platform (7), the position of the reference display module and the reference magnified image being the reference position; S3, taking the reference position as a reference, adjusting the first peripheral display module through the fine-tuning platform (7) so that the first magnified image (201) and the adjacent edges of the reference magnified image (200) overlap; S4, adjusting the second peripheral display module through the fine-tuning platform (7) so that the second enlarged image (202) and the adjacent edges of the first enlarged image (201) overlap; Adjust in sequence, S5. Adjusting the Mth peripheral display module through the fine-tuning platform (7) so that the adjacent edges of the Mth enlarged image (20m) and the M-1th enlarged image overlap.

Images