A pressing white point mechanism for screen

Abstract

The present application relates to a pressing white point mechanism for a screen, comprising: a screen bearing unit, the top of which is used to support a display module; a screen pressing unit, which includes a pressure block mounting plate, and a plurality of pressing blocks in a linear array on the pressure block mounting plate; the screen pressing unit adjusts its relative position with the screen bearing unit so that the plurality of pressing blocks press and cover the display area of ​​the display module. The present application sets a screen pressing unit for pressing the display module on the top of the screen bearing unit, and the screen pressing unit includes a pressure block mounting plate, and a plurality of pressing blocks in a linear array on the pressure block mounting plate. When the display module needs to be pressed, the screen pressing unit adjusts its relative position with the screen bearing unit so that the plurality of pressing blocks can press the plurality of areas of the display module in sequence, so as to achieve full coverage of the display area of ​​the display module, thereby improving the efficiency of detection of display module presses.

Description

Technical Field

[0001] The present application relates to the technical field of display module testing, and in particular to a white point pressing mechanism for a screen. Background Art

[0002] During the process of assembling the backlight source, LCD panel, back cover and other components into a complete machine, the back cover of the complete machine has contact points with the back plate of the backlight source at different heights. After the complete machine is assembled, the contact points of the back cover will squeeze the back plate of the backlight source, causing white spots to appear on the white screen of the LCD panel, affecting the quality of the display product.

[0003] In the prior art, a detection method in which personnel press the entire back panel is generally used to inspect such defects. The inventors have found that this detection method has the following disadvantages: First, the white spots caused by pressing are hidden defects, and the increase in the action of personnel pressing the back panel greatly increases the working time of personnel, seriously affecting production capacity; Second, since personnel have to perform both pressing and visual inspection at the same time, they are affected by the detection angle and coordination, which can easily lead to missed inspections. Summary of the Invention

[0004] The embodiment of the present application provides a white dot pressing mechanism for a screen to solve the problem in the related art that a person presses the white dot and adds the action of the person pressing the back panel, which greatly increases the working time of the person and seriously affects the production capacity.

[0005] An embodiment of the present application provides a white point pressing mechanism for a screen, comprising:

[0006] A screen bearing unit, the top of which is used to support the display module;

[0007] A screen pressing unit, comprising a pressing block mounting plate and a plurality of pressing blocks arranged in a linear array on the pressing block mounting plate;

[0008] The screen pressing unit adjusts its relative position with the screen bearing unit so that the pressing blocks press and cover the display area of ​​the display module.

[0009] In some embodiments, a plurality of the pressing blocks are arranged in a linear array along the X-direction and the Y-direction on the pressing block mounting plate, and a gap is preset between two adjacent pressing blocks.

[0010] In some embodiments: the pressing block includes a sliding sleeve fixed to the pressing block mounting plate, and a sliding rod slidably connected to the sliding sleeve;

[0011] A pressing block for pressing the display module is provided at the bottom of the slide bar, and a compression spring for driving the pressing block to move toward the display module is sleeved on the slide bar.

[0012] In some embodiments: a ball joint is fixedly connected to the bottom of the slide rod and is rotatably connected to the pressing block, and a ball head of the ball joint is rotatably connected to the pressing block;

[0013] A stop ring is provided on the top of the sliding sleeve, and the stop ring is used to limit the sliding rod from sliding toward the top of the sliding sleeve.

[0014] In some embodiments: it also includes a base unit for adjusting the position of the screen pressing unit, and the base unit includes a Z-axis adjustment mechanism for driving the screen bearing unit to move in the Z-axis direction, an X-axis adjustment mechanism for driving the screen bearing unit to move in the X-axis direction, and a Y-axis adjustment mechanism for driving the screen bearing unit to move in the Y-axis direction.

[0015] In some embodiments: the Y-axis adjustment mechanism includes a first rectangular frame surrounding the screen supporting unit, and the bottom of the first rectangular frame is provided with a Y-axis linear module and a Y-axis linear guide rail that drive the first rectangular frame to move in the Y-axis direction.

[0016] In some embodiments, the X-axis adjustment mechanism includes a second rectangular frame located on top of the Y-axis adjustment mechanism, and an X-axis linear module and an X-axis linear guide rail are provided at the bottom of the second rectangular frame for driving the second rectangular frame to move in the X-axis direction.

[0017] In some embodiments: the Z-axis adjustment mechanism includes a lifting cylinder fixed to the second rectangular frame and driving the pressing block mounting plate to move up and down;

[0018] Both sides of the pressure block mounting plate are provided with side plates connected to the lifting cylinder, and both sides of the side plates are provided with positioning pins slidably connected to the second rectangular frame.

[0019] In some embodiments: the side panels are each provided with an oil pressure buffer in contact with the second rectangular frame, and a limit screw for adjusting the minimum distance between the pressure block mounting plate and the second rectangular frame, and the bottom of the limit screw is provided with a buffer block in contact with the second rectangular frame.

[0020] In some embodiments: a positioning groove for accommodating a display module is provided on the top of the screen supporting unit, and the pressing block mounting plate is made of a transparent material.

[0021] The beneficial effects of the technical solution provided by this application include:

[0022] An embodiment of the present application provides a pressing white point mechanism for a screen. Since the pressing white point mechanism for a screen of the present application is provided with a screen supporting unit, the top of the screen supporting unit is used to support the display module; the screen pressing unit includes a pressure block mounting plate, and a plurality of pressing blocks linearly arrayed on the pressure block mounting plate; the screen pressing unit adjusts its relative position with the screen supporting unit so that the plurality of pressing blocks press and cover the display area of ​​the display module.

[0023] Therefore, the screen pressing white point mechanism of the present application is provided with a screen pressing unit for pressing the display module on top of the screen bearing unit. The screen pressing unit includes a pressing block mounting plate and a plurality of pressing blocks arranged in a linear array on the pressing block mounting plate. When the display module needs to be pressed, the screen pressing unit adjusts its relative position with the screen bearing unit, and the plurality of pressing blocks can press several areas of the display module in sequence, thereby achieving full coverage of the display area of ​​the display module and improving the efficiency of detecting presses on the display module.

[0024] The several pressing blocks of the present application are arranged in a linear array along the X and Y directions on the pressing block mounting plate, and a gap is preset between two adjacent pressing blocks. The gap is used to expose whether there is a white spot defect in the area around the pressing block when the pressing block presses the display module. When a white spot defect appears when the pressing block presses the display module, the area where the white spot appears in the display module can be identified by the human eye or a camera, and the quality of the display module can be detected. When several pressing blocks complete a press, the pressing block mounting plate can press the remaining unpressed areas by adjusting the relative position between the pressing block and the screen bearing unit, so as to cover all areas of the display module and quickly complete the quality inspection of the display module.

[0025] The pressing block of the present application includes a sliding sleeve fixed to a pressing block mounting plate and a sliding rod slidably connected within the sliding sleeve. A pressing block for pressing the display module is provided at the bottom of the sliding rod, and a compression spring is mounted on the sliding rod to drive the pressing block toward the display module. The pressing block's sliding sleeve is slidably connected to the sliding rod, and a compression spring is mounted on the sliding rod to drive the pressing block toward the display module. This allows the pressing block to gradually increase its pressing force on the display module under the push of the compression spring, thereby simulating a human hand pressing the display module, making quality inspection of the display module more realistic and reliable.

[0026] The present application has a ball joint fixedly connected to the bottom of the sliding rod, which is rotatably connected to the pressure block. The ball head of the ball joint is rotatably connected to the pressure block. A stop ring is provided on the top of the sliding sleeve to limit the sliding rod from sliding toward the top of the sliding sleeve. The pressure block and the sliding rod are connected by a ball joint. The pressure block can freely rotate relative to the sliding rod using the ball head of the ball joint. When the pressure block contacts the display module, the bottom surface of the pressure block can adaptively fit in contact with the pressing area of ​​the display module to prevent the tip of the pressure block from crushing the display module and to avoid defects such as wear and crushing during inspection. The stop ring is used to limit the sliding rod from continuing to slide upward so that the pressure block has enough pressure to press the display module.

[0027] The present application also includes a base unit for adjusting the position of the screen pressing unit, which includes a Z-axis adjustment mechanism for driving the screen bearing unit to move in the Z-axis direction, an X-axis adjustment mechanism for driving the screen bearing unit to move in the X-axis direction, and a Y-axis adjustment mechanism for driving the screen bearing unit to move in the Y-axis direction. The X-axis adjustment mechanism, the Y-axis adjustment mechanism, and the Z-axis adjustment mechanism are used to respectively drive the screen bearing unit to move in the X / Y / Z directions, respectively, to achieve full coverage pressing of the display area of ​​the display module, and to realize automated pressing detection, thereby improving detection efficiency.

[0028] The side panels of the present application are provided with an oil pressure buffer that contacts the second rectangular frame, and a limit screw that adjusts the minimum distance between the pressure block mounting plate and the second rectangular frame, and a buffer block that contacts the second rectangular frame is provided at the bottom of the limit screw. The oil pressure buffer is used to provide hydraulic buffering when the several pressing blocks of the screen pressing unit contact the display module, so that the several pressing blocks can flexibly contact the touch display module to prevent the touch display module from being damaged by excessive impact force. The limit screw is used to adjust the minimum distance between the pressure block mounting plate and the second rectangular frame to prevent the distance between the pressure block mounting plate and the second rectangular frame from being too small and the pressure from increasing to damage the touch display module, thereby avoiding secondary damage to the display module during press detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a structural front view of an embodiment of the present application;

[0031] Figure 2 for Figure 1 Cross-sectional view along AA direction;

[0032] Figure 3 A top view of the structure of an embodiment of the present application;

[0033] Figure 4 A structural perspective diagram of an embodiment of the present application;

[0034] Figure 5 This is a top view of the structure of the embodiment of the present application without the screen pressing unit;

[0035] Figure 6 This is a front view of the structure of the embodiment of the present application without the screen pressing unit;

[0036] Figure 7 This is a left view of the structure of the embodiment of the present application without the screen pressing unit;

[0037] Figure 8 This is a structural stereogram of the embodiment of the present application without a screen pressing unit;

[0038] Figure 9 This is a structural stereogram of the screen pressing unit according to an embodiment of the present application;

[0039] Figure 10 This is a structural stereogram of the pressing block according to an embodiment of the present application;

[0040] Figure 11 This is a cross-sectional view of the structure of the pressing block according to an embodiment of the present application.

[0041] Reference numerals:

[0042] 100, screen pressing unit; 110, pressing block mounting plate; 120, pressing block; 121, sliding sleeve; 122, sliding rod; 123, pressing block; 124, compression spring; 125, ball joint; 126, stop ring;

[0043] 200, screen carrying unit; 300, base unit; 310, Y-axis adjustment mechanism; 311, first rectangular frame; 312, Y-axis linear module; 313, Y-axis linear guide; 320, X-axis adjustment mechanism; 321, second rectangular frame;

[0044] 322. X-axis linear module; 323. X-axis linear guide; 330. Z-axis adjustment mechanism; 331. Lifting cylinder; 332. Side plate; 333. Locating pin; 334. Hydraulic buffer; 335. Limit screw; 400. Display module. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] The embodiment of the present application provides a white dot pressing mechanism for a screen, which can solve the problem in related technologies of using personnel to press the white dot and adding the action of personnel pressing the back panel, which greatly increases the working time of personnel and seriously affects production capacity.

[0047] See also Figures 1 to 4 As shown, an embodiment of the present application provides a white point pressing mechanism for a screen, comprising:

[0048] The top of the screen supporting unit 200 is used to support the display module 400. The screen supporting unit 200 is preferably, but not limited to, a rectangular plate. The display module 400 is restrained on the top of the screen supporting unit 200. The top of the screen supporting unit 200 has a positioning groove for accommodating the display module 400. The positioning groove is used to position the display module 400 around the perimeter to prevent the display module 400 from shifting on the top of the screen supporting unit 200 during press detection.

[0049] The screen pressing unit 100 includes a pressing block mounting plate 110, which is preferably, but not limited to, a rectangular plate made of a transparent material, such as a transparent glass plate or a transparent acrylic plate, and a plurality of pressing blocks 120 arranged in a linear array on the pressing block mounting plate 110. The plurality of pressing blocks 120 are arranged linearly on the pressing block mounting plate 110 to enable simultaneous pressing detection of multiple areas of the display module 400. The screen pressing unit 100 adjusts its relative position with the screen supporting unit 300 so that the plurality of pressing blocks 120 press and cover the display area of ​​the display module 400.

[0050] The screen pressing white point mechanism of the embodiment of the present application is provided with a screen pressing unit 100 for pressing the display module 400 on top of the screen bearing unit 300. The screen pressing unit 100 includes a pressing block mounting plate 110 and a plurality of pressing blocks 120 arranged in a linear array on the pressing block mounting plate 110. When the display module 400 needs to be pressed, the screen pressing unit 100 adjusts its relative position with the screen bearing unit 300, and the plurality of pressing blocks 120 sequentially press several areas of the display module 400 in batches, thereby achieving full coverage of the display area of ​​the display module 400 and improving the efficiency of detecting presses on the display module 400.

[0051] In some alternative embodiments: See Figure 9 As shown, an embodiment of the present application provides a white spot prevention mechanism for a screen. The white spot prevention mechanism comprises a plurality of pressing blocks 120 arranged in a linear array along the X and Y directions on a block mounting plate 110, with a gap provided between adjacent pressing blocks. This gap allows the pressing blocks 120 to detect white spot defects in the area surrounding the pressing blocks 120 when pressing a display module 400.

[0052] When the pressing blocks 120 press on the display module 400 and white spots appear, the area of ​​the display module 400 where the white spots appear can be identified by the human eye or a camera, thereby testing the quality of the display module 400. After several pressing blocks 120 complete a press, the pressing block mounting plate 110 adjusts its relative position to the screen support unit 300 in the X and Y directions to press the remaining unpressed areas, thereby covering the entire area of ​​the display module 400. Quality testing of the display module 400 can be completed in as few as three presses.

[0053] In some alternative embodiments: See Figures 9 to 11 As shown, an embodiment of the present application provides a white dot pressing mechanism for a screen. The pressing block 120 of the white dot pressing mechanism for a screen includes a sliding sleeve 121 fixed to a block mounting plate 110, and a sliding rod 122 slidably connected to the sliding sleeve 121. A pressing block 123 for pressing the display module 400 is provided at the bottom of the sliding rod 122. The bottom surface of the pressing block 123 is a regular quadrilateral structure. The minimum spacing between two adjacent pressing blocks 120 is preferably, but not limited to, the side length of the bottom surface of the pressing block 123. A compression spring 124 is provided on the sliding rod 122 to drive the pressing block 123 to move toward the display module 400. The compression spring 124 is used to drive the pressing block 123 to apply downward pressure to the display module 400.

[0054] The pressing block 120 of the present embodiment includes a sleeve 121 fixed to the pressing block mounting plate 110, and a slide rod 122 slidably connected within the sleeve 121. A pressing block 123 for pressing the display module 400 is provided at the bottom of the slide rod 122, and a compression spring 124 is mounted on the slide rod 122 to drive the pressing block 123 toward the display module 400. The sleeve 121 of the pressing block 120 is slidably connected to the slide rod 122, and a compression spring 124 is mounted on the slide rod 122 to drive the pressing block 123 toward the display module 400. This allows the pressing block 123 to gradually increase its pressing force on the display module 400 under the push of the compression spring 124, thereby simulating a human hand pressing the display module 400 and providing a more realistic and reliable quality inspection of the display module 400.

[0055] In some alternative embodiments: See Figures 9 to 11 As shown, the embodiment of the present application provides a screen pressing white dot mechanism. The bottom of the sliding rod 122 of the screen pressing white dot mechanism is fixedly connected to a ball joint 125 that is rotatably connected to a pressure block 123. The ball head of the ball joint 125 is rotatably connected to the pressure block 123. A stop ring 126 is provided at the top of the sliding sleeve 121 to prevent the sliding rod 122 from sliding toward the top of the sliding sleeve 121.

[0056] In the embodiment of the present application, the pressing block 123 is connected to the slide bar 122 via a ball joint 125. The ball joint 125 allows the pressing block 123 to freely rotate relative to the slide bar 122. When the pressing block 123 contacts the display module 400, the bottom surface of the pressing block 123 can adaptively fit the pressing area of ​​the display module 400, preventing the tip of the pressing block 123 from crushing the display module 400 and avoiding defects such as wear and damage during press detection. A stop ring 126 is used to limit the continued upward sliding of the slide bar 122, so that the pressing block 123 has sufficient pressure to press the display module 400.

[0057] In some alternative embodiments: See Figures 5 to 8 As shown, an embodiment of the present application provides a pressing white point mechanism for a screen, which also includes a base unit 300 for adjusting the position of the screen pressing unit 100, and the base unit 300 includes a Z-axis adjustment mechanism 330 for driving the screen bearing unit 100 to move in the Z-axis direction, an X-axis adjustment mechanism 320 for driving the screen bearing unit 100 to move in the X-axis direction, and a Y-axis adjustment mechanism 310 for driving the screen bearing unit 100 to move in the Y-axis direction.

[0058] Specifically, the Y-axis adjustment mechanism 310 includes a first rectangular frame 311 surrounding the screen support unit 200. A Y-axis linear module 312 and a Y-axis linear guide 313 are located at the bottom of the first rectangular frame 311 to drive the first rectangular frame 311 in the Y-axis direction. The X-axis adjustment mechanism 320 includes a second rectangular frame 321 located at the top of the Y-axis adjustment mechanism 310. An X-axis linear module 322 and an X-axis linear guide 323 are located at the bottom of the second rectangular frame 321 to drive the second rectangular frame 321 in the X-axis direction.

[0059] The Z-axis adjustment mechanism 330 includes a lift cylinder 331 fixed to the second rectangular frame 321 and driving the lifting movement of the pressure block mounting plate 110. Side plates 332 connected to the lift cylinder 331 are provided on both sides of the pressure block mounting plate 110. Positioning pins 333 slidably connected to the second rectangular frame 321 are provided on both sides of the side plates 332.

[0060] The embodiment of the present application also provides a base unit 300 for adjusting the position of the screen pressing unit 100. The base unit 300 includes a Z-axis adjustment mechanism 330 for driving the screen bearing unit 100 to move in the Z-axis direction, an X-axis adjustment mechanism 320 for driving the screen bearing unit 100 to move in the X-axis direction, and a Y-axis adjustment mechanism 310 for driving the screen bearing unit 100 to move in the Y-axis direction.

[0061] The X-axis adjustment mechanism 320, the Y-axis adjustment mechanism 310 and the Z-axis adjustment mechanism 330 are used to respectively drive the screen supporting unit 100 to move in the X / Y / Z directions respectively, to achieve full coverage pressing of the display area of ​​the display module 300, and to realize automatic pressing detection to improve detection efficiency.

[0062] In some alternative embodiments: See Figures 5 to 8 As shown, an embodiment of the present application provides a pressing white dot mechanism for a screen, and the side panels 332 of the pressing white dot mechanism for a screen are provided with an oil pressure buffer 334 that contacts the second rectangular frame 321, and a limiting screw 335 for adjusting the minimum distance between the pressure block mounting plate 110 and the second rectangular frame 321, and a buffer block that contacts the second rectangular frame 321 is provided at the bottom of the limiting screw 335.

[0063] The side panels 332 of the present embodiment are each equipped with a hydraulic buffer 334 that contacts the second rectangular frame 321, as well as a limit screw 335 that adjusts the minimum distance between the pressure block mounting plate 110 and the second rectangular frame 321. The limit screw 335 has a buffer block at its base that contacts the second rectangular frame 321. The hydraulic buffer 334 is used to provide hydraulic cushioning when the pressure blocks 120 of the screen pressure unit 100 contact the display module 400, allowing the pressure blocks 120 to flexibly contact the display module 400 and preventing damage to the display module 400 from excessive impact.

[0064] The limit screw 335 is used to adjust the minimum distance between the pressure block mounting plate 110 and the second rectangular frame 321 to prevent the pressure between the pressure block mounting plate 110 and the second rectangular frame 321 from increasing due to the distance being too small and damaging the touch display module 400, thereby avoiding secondary damage to the display module 400 during press detection.

[0065] How it works

[0066] An embodiment of the present application provides a pressing white point mechanism for a screen. Since the pressing white point mechanism for a screen of the present application is provided with a screen supporting unit 300, the top of the screen supporting unit 300 is used to support the display module 400; the screen pressing unit 100, the screen pressing unit 100 includes a pressure block mounting plate 110, and a plurality of pressing blocks 120 linearly arrayed on the pressure block mounting plate 110; the screen pressing unit 100 adjusts its relative position with the screen supporting unit 300 so that the plurality of pressing blocks 120 press and cover the display area of ​​the display module 400.

[0067] Therefore, the screen pressing white point mechanism of the present application is provided with a screen pressing unit 100 for pressing the display module 400 on top of the screen bearing unit 300. The screen pressing unit 100 includes a pressing block mounting plate 110 and a plurality of pressing blocks 120 arranged in a linear array on the pressing block mounting plate 110. When the display module 400 needs to be pressed, the screen pressing unit 100 adjusts its relative position with the screen bearing unit 300, and the plurality of pressing blocks 120 can press several areas of the display module 400 in sequence, thereby achieving full coverage of the display area of ​​the display module 400 and improving the efficiency of detecting the press of the display module 400.

[0068] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0069] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0070] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these 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 present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A white point pressing mechanism for a screen, characterized in that: include: A screen bearing unit (200), the top of the screen bearing unit (200) being used to support the display module (400); A screen pressing unit (100), comprising a pressing block mounting plate (110), and a plurality of pressing blocks (120) arranged in a linear array on the pressing block mounting plate (110); The screen pressing unit (100) adjusts its relative position with the screen bearing unit (200) so that the plurality of pressing blocks (120) press and cover the display area of ​​the display module (400); A plurality of the pressing blocks (120) are arranged in a linear array along the X and Y directions on the block mounting plate (110), with a gap being preset between two adjacent pressing blocks (120); The screen pressing unit (100) is located above the screen bearing unit (200), and the pressing block (120) is located on a surface of the block mounting plate (110) opposite to the screen bearing unit (200); The invention also includes a base unit (300) for adjusting the position of the screen pressing unit (100), wherein the base unit (300) includes an X-axis adjustment mechanism (320) for driving the screen pressing unit (100) to move in the X-axis direction, and a Y-axis adjustment mechanism (310) for driving the screen pressing unit (100) to move in the Y-axis direction.

2. The white point pressing mechanism for a screen according to claim 1, wherein: The pressing block (120) comprises a sliding sleeve (121) fixed on the pressing block mounting plate (110), and a sliding rod (122) slidably connected in the sliding sleeve (121); A pressing block (123) for pressing the display module (400) is provided at the bottom of the slide bar (122), and a compression spring (124) for driving the pressing block (123) to move toward the display module (400) is sleeved on the slide bar (122).

3. The white point pressing mechanism for a screen according to claim 2, wherein: The bottom of the slide rod (122) is fixedly connected to a ball joint (125) rotatably connected to the pressing block (123), and the ball head of the ball joint (125) is rotatably connected to the pressing block (123); A stop ring (126) is provided on the top of the sliding sleeve (121), and the stop ring (126) is used to limit the sliding rod (122) from sliding toward the top of the sliding sleeve (121).

4. The white point pressing mechanism for a screen according to claim 1, wherein: The base unit (300) comprises a Z-axis adjustment mechanism (330) for driving the screen pressing unit (100) to move in the Z-axis direction.

5. The white point pressing mechanism for a screen according to claim 4, characterized in that: The Y-axis adjustment mechanism (310) comprises a first rectangular frame (311) arranged around the screen carrying unit (200), and a Y-axis linear module (312) and a Y-axis linear guide rail (313) are provided at the bottom of the first rectangular frame (311) for driving the first rectangular frame (311) to move in the Y-axis direction.

6. A white point pressing mechanism for a screen as claimed in claim 4 or 5, characterized in that: The X-axis adjustment mechanism (320) comprises a second rectangular frame (321) located at the top of the Y-axis adjustment mechanism (310), and an X-axis linear module (322) and an X-axis linear guide rail (323) are provided at the bottom of the second rectangular frame (321) for driving the second rectangular frame (321) to move in the X-axis direction.

7. The white point pressing mechanism for a screen according to claim 6, characterized in that: The Z-axis adjustment mechanism (330) includes a lifting cylinder (331) fixed on the second rectangular frame (321) and driving the pressing block mounting plate (110) to move upward and downward; Both sides of the pressure block mounting plate (110) are provided with side plates (332) connected to the lifting cylinder (331), and both sides of the side plates (332) are provided with positioning pins (333) slidably connected to the second rectangular frame (321).

8. The white point pressing mechanism for a screen according to claim 7, characterized in that: The side plates (332) are each provided with an oil pressure buffer (334) that contacts the second rectangular frame (321), and a limiting screw (335) that adjusts the minimum distance between the pressure block mounting plate (110) and the second rectangular frame (321), and a buffer block that contacts the second rectangular frame (321) is provided at the bottom of the limiting screw (335).

9. The white point pressing mechanism for a screen according to claim 1, wherein: A positioning groove for accommodating the display module (400) is provided on the top of the screen bearing unit (200), and the pressing block mounting plate (110) is made of a transparent material.

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