Backlight detection device for liquid crystal display screen production

Abstract

The invention provides a backlight detection device for liquid crystal display screen production, and belongs to the technical field of display screen detection, the backlight detection device comprises a processing table, support frames are arranged at the two ends of the processing table, the support frames are connected with a driving assembly and a sliding rail, and a gear disc and a rotating column are arranged at the upper end of the processing table; the inclination assembly is used for changing the angle of the display screen during detection; the supporting assembly is used for being matched with the inclined assembly for use; the bearing assembly is used for bearing the display screen; the detection assembly is used for detecting the display screen; the backlight detection device has the beneficial effects that when the supporting plate inclines in different directions, the positioning plate can rotate above the supporting plate, so that the detection range and angle are expanded, the detection efficiency is improved, the detection cost is reduced, different detection angles can be covered, the backlight problem under multiple visual angles can be captured at a time, repeated respective adjustment is avoided, and the time is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen detection, and in particular to a backlight detection device for producing liquid crystal display screens. Background Art

[0002] The backlight module is one of the key components of the LCD panel. Its function is to provide sufficient brightness and evenly distributed light source so that it can display images normally. The LCD is a passive light-emitting element. The display screen itself does not emit light, but is illuminated by the backlight system underneath it. The backlight source and LCD screen together constitute the LCD display module.

[0003] In actual operation, some detection equipment is not convenient for adjusting the tilt angle of the LCD screen. If the detection angle is to be changed, cumbersome multiple adjustment steps may be required, which consumes a lot of time and effort and reduces the detection efficiency. In addition, due to the limitations of the detection angle, the detection data obtained by the detection equipment is relatively single and cannot fully reflect the backlight performance of the LCD screen at different viewing angles. This may lead to inaccurate evaluation of the quality of the display screen, and some potential problems are ignored, affecting the quality control and market competitiveness of the product. For example, in actual use, the angles at which users view the display screen are diverse and complex, and there may be changes in both horizontal and vertical directions. When evaluating the viewing angle performance of the display screen, a single angle adjustment test is not convenient for knowing the changes in color and brightness uniformity at different viewing angles, and it is difficult to judge whether the product meets high quality standards. How to invent a backlight detection device for LCD screen production to solve these problems has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a backlight detection device for liquid crystal display production, aiming to solve the problem of cumbersome multiple adjustment steps, consuming a lot of time and energy, reducing detection efficiency, and making it inconvenient to know the changes under different viewing angles.

[0005] The present invention is achieved in that: The present invention provides a backlight detection device for liquid crystal display production, comprising a processing table, support frames are provided at both ends of the processing table, the support frames are connected with a driving assembly and a slide rail, a gear plate and a rotating column are provided at the upper end of the processing table, and further comprising: A tilting component, the tilting component is connected to the processing table, and the tilting component is used to change the angle of the display screen during detection; A support assembly, the support assembly is located above the processing table, and the support assembly is used in conjunction with the tilting assembly; A supporting assembly, the supporting assembly is located above the supporting assembly and is used to support the display screen; The detection component is located above the supporting component, and the detection component is used for detecting the display screen.

[0006] Preferably, the upper side wall of the processing table is respectively provided with a front groove and a rear groove. The processing table is fixedly connected to the support frame. The front groove and the rear groove are located between the two support frames. The side walls of the two support frames are fixedly connected to both ends of the slide rail. The side wall of the processing table is rotatably connected to one end of the rotating column. The outer wall of the rotating column is fixedly connected to the gear disk. The upper end of the rotating column is rotatably connected to a cross shaft. Fixed seats are arranged at both ends of the rotating column, and the fixed seats are fixedly connected to the side wall of the processing table.

[0007] Preferably, the driving component includes a motor, a threaded rod, and a driving wheel. The motor is fixedly connected to the side wall of one of the support frames. One end of the threaded rod is fixedly connected to the motor. The other end of the threaded rod penetrates through the side wall of the other support frame and is fixedly connected to the driving wheel. The driving wheel is connected with a transmission belt.

[0008] Preferably, the tilting component includes a first lead screw and a second lead screw. The first lead screw and the second lead screw are respectively connected with a first driven wheel and a second driven wheel. One end of the first lead screw is rotatably connected to the inner wall of the rear groove. The other end of the first lead screw penetrates through the side wall of the processing table and is fixedly connected to the first driven wheel. One end of the second lead screw is rotatably connected to the inner wall of the front groove. The other end of the second lead screw penetrates through the side wall of the processing table and is fixedly connected to the second driven wheel. The first driven wheel and the second driven wheel are in transmission connection with the driving wheel through a transmission belt.

[0009] Preferably, both the first lead screw and the second lead screw are threadedly connected with moving ejector rods. The two moving ejector rods are respectively slidably connected to the inner walls of the front groove and the rear groove. One side of the moving ejector rod is fixedly connected with a toothed plate, and the toothed plate is meshed with the gear disk.

[0010] Preferably, the supporting component includes a support plate. Both ends of the support plate are fixedly connected with connecting rods. The ends of the connecting rods far away from the support plate are rotatably connected to the fixed seats. A through hole is formed in the side wall of the support plate. A fixed ring is fixedly connected to the side wall of the support plate, and the fixed ring is located outside the through hole.

[0011] Preferably, one end of the support plate far away from the fixed ring is fixedly connected with a sliding plate. The sliding plate is arc-shaped. The two sliding plates are symmetrically distributed about the center line of the through hole. One side of each sliding plate is provided with a telescopic spring. The two ends of the telescopic spring are respectively fixedly connected to the side wall of the support plate and the side wall of the processing table. The two sliding plates and the front groove and the rear groove are located in the same vertical plane.

[0012] Preferably, the supporting component includes a positioning plate, one side of the positioning plate is fixedly connected with a fixing column, the end of the fixing column away from the positioning plate is rotatably connected with two symmetrical ends of a cross shaft, the side wall of the positioning plate is fixedly connected with a plurality of fixing rods distributed in a circumferential array, and one end of the fixing rod is fixedly connected with a limiting ring which is rotatably connected with a fixing ring.

[0013] Preferably, the detection component includes a mounting plate, the side wall of the mounting plate is fixedly connected with a threaded block and a slider, the threaded block is in threaded connection with a threaded rod, and the slider is slidably connected with a slide rail.

[0014] Preferably, a detector is fixedly connected inside the mounting plate, air bags are fixedly connected to both ends of the mounting plate, and an air blowing hole is formed in one side of the mounting plate, and the air blowing hole is communicated with one end of the air bag.

[0015] The beneficial effects of the present invention are as follows: During the detection process, the motor and the threaded rod drive the driving wheel to rotate, and through transmission, the first driven wheel and the second driven wheel drive the first lead screw and the second lead screw to rotate, so that the two moving ejector rods move synchronously to one side and slide with the corresponding slide plates respectively, thereby making the support plate tilt in different directions, so as to complete the change of the tilt angle of the support plate, thereby changing the detection angle of the display screen and improving the detection effect; at the same time, during the movement of the moving ejector rod, the toothed plate will be driven to move. Through the meshing of the toothed plate and the gear disc, the rotating column can be driven to rotate, and through the rotational connection between the cross shaft and the fixing column, the positioning plate can be driven to rotate above the support plate, and with the connection among the rotating column, the cross shaft and the fixing column, it can be ensured that the positioning plate can be tilted and rotated while the support plate is tilted, thereby increasing the detection range and angle, being able to obtain the backlight conditions of multiple perspectives of the display screen, greatly improving the detection efficiency at the same time, reducing the detection time cost, enabling the detector to quickly cover different angles, capturing the backlight problems under multiple perspectives at one time, avoiding multiple separate adjustments, saving time, and being able to simulate the actual user usage scenario, making the adjustment closer to the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic diagram of the overall front side structure of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall rear structure of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of the detection component structure of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention; Figure 4 It is an exploded structure schematic diagram of the support component and the supporting component of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the bottom structure of the positioning plate of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention; Figure 6 It is a schematic diagram of the support plate of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention; Figure 7 It is a schematic diagram of the processing table of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention; Figure 8 It is a backlight detection device for liquid crystal display production provided by an embodiment of the present invention Figure 7 The enlarged schematic diagram of the structure at A in; Figure 9 It is a schematic diagram of the front structure of the state change during the detection process of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention; Figure 10 It is a schematic diagram of the rear structure of the state change during the detection process of a backlight detection device for liquid crystal display production provided by an embodiment of the present invention.

[0018] In the figure: 1. Processing table; 101. Front groove; 102. Rear groove; 2. Driving component; 21. Motor; 22. Threaded rod; 23. Driving wheel; 24. Transmission belt; 3. Inclined component; 31. Moving ejector rod; 32. Rack; 33. Driven wheel one; 34. Driven wheel two; 35. Lead screw one; 36. Lead screw two; 4. Slide rail; 5. Support frame; 6. Detection component; 61. Slide block; 62. Threaded block; 63. Airbag; 64. Mounting plate; 65. Detector; 66. Air blowing hole; 7. Supporting component; 71. Positioning plate; 72. Fixed rod; 73. Limiting ring; 74. Fixed column; 8. Support component; 801. Support plate; 802. Telescopic spring; 803. Connecting rod; 804. Fixed ring; 805. Through hole; 806. Slide plate; 9. Fixed seat; 10. Gear disc; 11. Rotating column; 12. Cross shaft. Detailed implementation manners

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Example 1. Refer to Figures 1 - 10 , a backlight detection device for liquid crystal display production, including a processing table 1. There are support frames 5 at both ends of the processing table 1. The support frames 5 are connected to a driving component 2 and a slide rail 4. There is a gear disk 10 and a rotating column 11 on the upper end of the processing table 1. It further includes: An inclination component 3, which is connected to the processing table 1 and is used to change the angle of the display screen during detection; A support component 8, which is located above the processing table 1 and is used to cooperate with the use of the inclination component 3; A supporting component 7, which is located above the support component 8 and is used to carry the display screen; A detection component 6, which is located above the supporting component 7 and is used to detect the display screen.

[0021] Furthermore; the driving component 2 includes a motor 21, a threaded rod 22, and a driving wheel 23. The motor 21 is fixedly connected to the side wall of one of the support frames 5. One end of the threaded rod 22 is fixedly connected to the motor 21, and the other end of the threaded rod 22 penetrates through the side wall of the other support frame 5 and is fixedly connected to the driving wheel 23. The driving wheel 23 is connected to a transmission belt 24; the upper side wall of the processing table 1 is respectively provided with a front groove 101 and a rear groove 102. The processing table 1 is fixedly connected to the support frame 5. The front groove 101 and the rear groove 102 are located between the two support frames 5. The two side walls of the support frames 5 are fixedly connected to both ends of the slide rail 4. The side wall of the processing table 1 is rotatably connected to one end of the rotating column 11. The outer wall of the rotating column 11 is fixedly connected to the gear disk 10. The upper end of the rotating column 11 is rotatably connected to a cross shaft 12. There are fixing seats 9 at both ends of the rotating column 11. The fixing seats 9 are fixedly connected to the side wall of the processing table 1; the detection component 6 includes a mounting plate 64. A threaded block 62 and a slider 61 are fixedly connected to the side wall of the mounting plate 64. The threaded block 62 is in threaded connection with the threaded rod 22, and the slider 61 is slidably connected to the slide rail 4.

[0022] Detection of the display screen by the detection component 6: When performing backlight detection on the liquid crystal display screen, the display screen can be fixedly installed on the surface of the positioning plate 71, and the positioning plate 71 acts as a fixture in the prior art, which can complete the positioning of display screens of different sizes. Usually, the backlight source of the display screen itself is directly used as the detection light source to make the backlight source of the display screen emit light normally. During the detection, the motor 21 is powered by an external power supply to rotate forward, driving the threaded rod 22 to rotate. At this time, through the threaded connection between the threaded block 62 and the threaded rod 22, and the sliding of the slider 61 and the slide rail 4, the mounting plate 64 can be limited to ensure the stability of the mounting plate 64 during movement and avoid the situation of shaking of the detector 65 during detection. In this way, through the movement of the optical detection device above the display screen, the light emitted by the backlight source is measured and analyzed from the display surface of the display screen.

[0023] Further, the tilting component 3 includes a first lead screw 35 and a second lead screw 36. The first lead screw 35 and the second lead screw 36 are respectively connected with a first driven wheel 33 and a second driven wheel 34. One end of the first lead screw 35 is rotatably connected to the inner wall of the rear groove 102, and the other end of the first lead screw 35 penetrates through the side wall of the processing table 1 and is fixedly connected with the first driven wheel 33. One end of the second lead screw 36 is rotatably connected to the inner wall of the front groove 101, and the other end of the second lead screw 36 penetrates through the side wall of the processing table 1 and is fixedly connected with the second driven wheel 34. The first driven wheel 33 and the second driven wheel 34 are in transmission connection with the driving wheel 23 through a transmission belt 24. Both the first lead screw 35 and the second lead screw 36 are threadedly connected with a moving ejector rod 31. The two moving ejector rods 31 are respectively slidably connected to the inner walls of the front groove 101 and the rear groove 102. One side of the moving ejector rod 31 is fixedly connected with a toothed plate 32, and the toothed plate 32 is meshed with the gear disk 10. The supporting component 8 includes a supporting plate 801. Both ends of the supporting plate 801 are fixedly connected with connecting rods 803. The ends of the connecting rods 803 far from the supporting plate 801 are rotatably connected with the fixed seat 9. A through hole 805 is formed in the side wall of the supporting plate 801. A fixing ring 804 is fixedly connected to the side wall of the supporting plate 801, and the fixing ring 804 is located outside the through hole 805. One end of the supporting plate 801 far from the fixing ring 804 is fixedly connected with a sliding plate 806. The sliding plate 806 is arc-shaped. The two sliding plates 806 are symmetrically distributed about the center line of the through hole 805. A telescopic spring 802 is arranged on one side of each sliding plate 806. The two ends of the telescopic spring 802 are respectively fixedly connected with the side wall of the supporting plate 801 and the side wall of the processing table 1. The two sliding plates 806 are located in the same vertical plane as the front groove 101 and the rear groove 102.

[0024] The change in the tilt angle of the display screen by the tilt component 3: While the threaded rod 22 rotates, it can drive the driving wheel 23 to rotate synchronously. Through the connection between the transmission belt 24 and the first driven wheel 33 and the second driven wheel 34, the first driven wheel 33 and the second driven wheel 34 can drive the first lead screw 35 and the second lead screw 36 to rotate respectively. The diameters, pitches, thread profiles, and helix directions of the first lead screw 35 and the second lead screw 36 are the same. Therefore, the two moving ejector rods 31 can be driven to move synchronously to one side by the first lead screw 35 and the second lead screw 36, and drive the toothed plate 32 to move towards the gear disc 10. The distance between the two moving ejector rods 31 is greater than the length of the sliding plate 806. Therefore, during the movement, one of the moving ejector rods 31 will first slide with the sliding plate 806 on one side below the support plate 801. At this time, through the rotational connection between the connecting rod 803 and the fixed seat 9, one side of the support plate 801 can be stably lifted, and the corresponding telescopic spring 802 can be stretched, so that the telescopic spring 802 on the other side is compressed, thereby completing the change in the tilt angle of one side of the support plate 801, changing the detection angle of the display screen, and improving the detection effect. With the continuous movement of the moving ejector rod 31 and the cooperation of the arc-shaped sliding plate 806 and the telescopic spring 802, the support plate 801 can gradually return to the balanced state. At this time, the front moving ejector rod 31 has moved to the other side of the support plate 801, and the rear moving ejector rod 31 has just moved below the support plate 801. Then, with the continuous rotation of the threaded rod 22, the rear moving ejector rod 31 can slide with the sliding plate 806 on the other side through the second lead screw 36, so that the support plate 801 tilts to the other side, thereby changing the angle adjustment of the display screen in different directions above the positioning plate 71, so that the detector 65 can detect the display screen at a certain angle and improve the detection quality. The first driven wheel 33 and the second driven wheel 34 mentioned above are of the same specification and different sizes from the driving wheel 23 to ensure that the first driven wheel 33 and the second driven wheel 34 are driven to rotate synchronously by the transmission belt 24.

[0025] Refer to Figure 4 , Figure 5 , Figure 9 and Figure 10 , further; the supporting component 7 includes a positioning plate 71. One side of the positioning plate 71 is fixedly connected with a fixed column 74. One end of the fixed column 74 away from the positioning plate 71 is rotationally connected with two symmetric ends of the cross shaft 12. The side wall of the positioning plate 71 is fixedly connected with a plurality of fixing rods 72 distributed in a circumferential array. One end of the fixing rod 72 is fixedly connected with a limiting ring 73. The limiting ring 73 is rotationally connected with the fixing ring 804.

[0026] Interaction between the supporting component 7 and the gear disk 10: During the movement of the moving ejector rod 31, the toothed plate 32 will be driven to move. When the toothed plate 32 moves to one side of the gear disk 10, the two will mesh with each other, thereby driving the rotating column 11 to rotate through the gear disk 10. At the same time, through the rotational connection between the cross shaft 12 and the rotating column 11 and the fixed column 74 respectively, a universal joint structure is formed among the rotating column 11, the cross shaft 12 and the fixed column 74, and with the support of the fixed rod 72 and the rotational connection between the limiting ring 73 and the fixed ring 804, the positioning plate 71 is driven to rotate above the support plate 801, and with the connection among the rotating column 11, the cross shaft 12 and the fixed column 74, it can ensure that the positioning plate 71 can be driven to tilt and rotate while the support plate 801 is tilted, thereby improving the detection range and angle, being able to obtain the backlight conditions of multiple perspectives of the display screen, and at the same time greatly improving the detection efficiency and reducing the detection time cost, enabling the detector 65 to quickly cover different angles and capture the backlight problems under multiple perspectives at one time, such as Figure 9 and Figure 10 As shown, it can avoid the repeated operations during multiple separate adjustments, save a lot of time, and can simulate the actual user usage scenario, making the adjustment closer to the actual situation. At the same time, the adjustment can comprehensively detect the backlight performance under different angle combinations, and find problems such as the brightness uniformity problem at the edge of the screen when viewed from the upper oblique side, etc., ensuring good visual effects of the product at various usage angles.

[0027] Embodiment 2, referring to Figures 1 - 3 , further; an optical detector 65 is fixedly connected inside the mounting plate 64, air bags 63 are fixedly connected to both ends of the mounting plate 64, and an air blowing hole 66 is opened on one side of the mounting plate 64, and the air blowing hole 66 is communicated with one end of the air bag 63.

[0028] Cleaning of the detector 65 by the air bag 63: During the process of the threaded rod 22 driving the mounting plate 64 to move, when the air bag 63 on one side of the mounting plate 64 contacts the side wall of the corresponding support frame 5, as the threaded rod 22 continues to rotate, the air bag 63 can be squeezed, and the gas inside is quickly blown onto the surface of the detector 65 through the small air blowing hole 66, thereby cleaning the dust attached to the surface of the lens of the detector 65, avoiding the attachment of too many impurities and affecting the detection accuracy, and reducing the number of manual cleanings through automatic cleaning. The detector 65 is an optical detection device, which can be a luminance meter, a chroma meter, etc., and all electrical components in this device are powered by an external power supply and can be connected to an external controller.

[0029] It should be noted that the specific model and specification of the motor need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A backlight detection device for liquid crystal display production, comprising a processing table (1), wherein two ends of the processing table (1) are provided with support frames (5), and the support frames (5) are connected with a driving component (2) and a slide rail (4), characterized in that, The upper end of the processing table (1) is provided with a gear disk (10) and a rotating column (11), and further includes: An inclination assembly (3), the inclination assembly (3) is connected to the processing table (1), and the inclination assembly (3) is used to change the angle during the detection of the display screen; A support assembly (8), the support assembly (8) is located above the processing table (1), and the support assembly (8) is used to cooperate with the use of the inclination assembly (3); A supporting assembly (7), the supporting assembly (7) is located above the support assembly (8), and the supporting assembly (7) is used to carry the display screen; A detection assembly (6), the detection assembly (6) is located above the supporting assembly (7), and the detection assembly (6) is used to detect the display screen.

2. The backlight detection device for liquid crystal display production according to claim 1, wherein, The upper side wall of the processing table (1) is respectively provided with a front groove (101) and a rear groove (102), the processing table (1) is fixedly connected to the support frame (5), the front groove (101) and the rear groove (102) are located between the two support frames (5), the side walls of the two support frames (5) are fixedly connected to both ends of the slide rail (4), the side wall of the processing table (1) is rotationally connected to one end of the rotating column (11), the outer wall of the rotating column (11) is fixedly connected to the gear disk (10), the upper end of the rotating column (11) is rotationally connected to a cross shaft (12), and both ends of the rotating column (11) are provided with fixing seats (9), and the fixing seats (9) are fixedly connected to the side wall of the processing table (1).

3. The backlight detection device for liquid crystal display production according to claim 1, wherein The driving assembly (2) includes a motor (21), a threaded rod (22) and a driving wheel (23), the motor (21) is fixedly connected to the side wall of one of the support frames (5), one end of the threaded rod (22) is fixedly connected to the motor (21), the other end of the threaded rod (22) penetrates through the side wall of the other support frame (5) and is fixedly connected to the driving wheel (23), and the driving wheel (23) is connected with a transmission belt (24).

4. The backlight detection device for manufacturing a liquid crystal display screen according to claim 2, wherein, The inclination assembly (3) includes a first lead screw (35) and a second lead screw (36), the first lead screw (35) and the second lead screw (36) are respectively connected with a first driven wheel (33) and a second driven wheel (34), one end of the first lead screw (35) is rotationally connected to the inner wall of the rear groove (102), the other end of the first lead screw (35) penetrates through the side wall of the processing table (1) and is fixedly connected to the first driven wheel (33), one end of the second lead screw (36) is rotationally connected to the inner wall of the front groove (101), the other end of the second lead screw (36) penetrates through the side wall of the processing table (1) and is fixedly connected to the second driven wheel (34), and the first driven wheel (33) and the second driven wheel (34) are in transmission connection with the driving wheel (23) through the transmission belt (24).

5. An LCD backlight detection device for production, according to claim 4, characterized in that Both the first lead screw (35) and the second lead screw (36) are threadedly connected with a moving ejector rod (31), the two moving ejector rods (31) are respectively slidably connected to the inner walls of the front groove (101) and the rear groove (102), one side of the moving ejector rod (31) is fixedly connected with a toothed plate (32), and the toothed plate (32) is in meshing connection with the gear disk (10).

6. The backlight detection device for manufacturing a liquid crystal display screen according to claim 2, wherein, The support assembly (8) includes a support plate (801). Both ends of the support plate (801) are fixedly connected with connecting rods (803). One end of the connecting rod (803) far away from the support plate (801) is rotatably connected to a fixed seat (9). A through hole (805) is formed in the side wall of the support plate (801). A fixed ring (804) is fixedly connected to the side wall of the support plate (801), and the fixed ring (804) is located outside the through hole (805).

7. An LCD backlight detection device for production, according to claim 6, characterized in that One end of the support plate (801) far away from the fixed ring (804) is fixedly connected with a sliding plate (806). The sliding plate (806) is arc-shaped. The two sliding plates (806) are symmetrically distributed about the center line of the through hole (805). One side of each sliding plate (806) is provided with a telescopic spring (802). Both ends of the telescopic spring (802) are fixedly connected with the side wall of the support plate (801) and the side wall of the processing table (1) respectively. The two sliding plates (806) and the front groove (101) and the rear groove (102) are located in the same vertical plane.

8. An LCD backlight detection device for production, according to claim 7, characterized in that, The supporting component (7) includes a positioning plate (71). One side of the positioning plate (71) is fixedly connected with a fixed column (74). One end of the fixed column (74) far away from the positioning plate (71) is rotatably connected to two of the symmetric ends of a cross shaft (12). A plurality of fixing rods (72) distributed in a circumferential array are fixedly connected to the side wall of the positioning plate (71). One end of the fixing rod (72) is fixedly connected with a limiting ring (73). The limiting ring (73) is rotatably connected with the fixed ring (804).

9. The backlight detection device for liquid crystal display production according to claim 1, characterized in that, The detection component (6) includes a mounting plate (64). A threaded block (62) and a slider (61) are fixedly connected to the side wall of the mounting plate (64). The threaded block (62) is in threaded connection with a threaded rod (22). The slider (61) is slidably connected with a slide rail (4).

10. A backlight detection device for liquid crystal display production according to claim 9, characterized in that, A detector (65) is fixedly connected inside the mounting plate (64). Air bags (63) are fixedly connected to both ends of the mounting plate (64). An air blowing hole (66) is formed in one side of the mounting plate (64), and the air blowing hole (66) is communicated with one end of the air bag (63).

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