A liquid crystal display module quality detection device

Abstract

The present application relates to a kind of liquid crystal display module quality detection device, including box, the inside fixed mounting of box is partition, the side of partition is provided with the heat supply mechanism for the heating of display screen module area, and the other side of partition is provided with the air cooling mechanism for cooling in box;By controlling the extension end of first cylinder from shortest elongation to longest, drive square bar to move downwards, by first lever first rotating plate is driven to overturn, so that electric heating rod is close to the drive IC of display screen module, in this process, by second lever second rotating plate is driven to overturn, lift frame is pushed to rise, so that lifting plate electric heating plate is driven to close to the backlight of display screen module, open electric heating rod and electric heating plate, heat the drive IC and backlight of display screen module, effectively simulate the other parts of display screen module temperature low, and backlight and drive IC high temperature, by detecting tool detects whether the light attenuation rate of display screen module is qualified.

Description

Technical Field

[0001] This invention relates to the field of display module testing technology, specifically to a quality testing device for liquid crystal display modules. Background Technology

[0002] LCD module quality inspection is a comprehensive and meticulous process aimed at ensuring that the display meets high standards in multiple aspects such as brightness, color, response speed, and structural integrity. Among these aspects, a multi-field color luminance meter is used to perform non-contact point measurement on the display module to detect its brightness, color, and related optical parameters.

[0003] Existing display module quality testing equipment heats the display module uniformly from all sides during operation, which can only simulate the overall performance under high temperature conditions. However, during long-term operation, the backlight panel and driver IC are high-heat areas, making it difficult to simulate the lower temperatures in other parts of the display module while the backlight panel and driver IC are at high temperatures, thus failing to test whether the light decay rate of the display module is up to standard. At the same time, when cooling the internal parts of the display module quality testing equipment, if the airflow blows directly onto the display module, it can easily lead to rapid local cooling, causing thermal stress cracks or delamination, which affects the product quality of the display module. Summary of the Invention

[0004] The technical problem that this solution addresses is:

[0005] (1) How to solve the problem of difficulty in simulating the light decay rate of the display module when the temperature of other parts of the display module is low, while the backlight board and driver IC are high;

[0006] (2) How to solve the problem that if the airflow blows directly onto the display module, it will easily lead to local rapid cooling, resulting in thermal stress cracks or delamination, which will affect the quality of the display module product.

[0007] The objective of this invention can be achieved through the following technical solution: a liquid crystal display module quality inspection device, including a housing, wherein a longitudinally arranged partition is fixedly installed inside the housing, a heating mechanism for heating the display module area is provided on one side of the partition, and an air-cooling mechanism for cooling the inside of the housing is provided on the other side of the partition.

[0008] The heating mechanism includes two guide plates fixedly connected to the inner wall of the box. A square rod is movably inserted into the middle of the two guide plates. A support unit for placing the display module is provided on the side of the square rod facing the partition.

[0009] A further technical improvement of the present invention is that: a first cylinder arranged longitudinally is fixedly installed on the top of the box body, the extended end of the first cylinder is fixedly connected to the top end of the square rod, a first lever is fixedly installed on the top of the square rod, and a second lever is fixedly installed on the bottom of the square rod.

[0010] A further technical improvement of the present invention is that: a first rotating plate is rotatably arranged on the inner side wall of the housing, a first sliding groove is provided in the middle of the first rotating plate, the first lever is movably connected to the first sliding groove, a mounting bracket is fixedly connected to the end of the first rotating plate away from the inner wall of the housing, and an electric heating rod is fixedly arranged at the bottom end of the mounting bracket, the position of the electric heating rod corresponding to the position of the driver IC of the display module.

[0011] A further technical improvement of the present invention is that: the support unit includes a support base for placing the display module, and support legs are fixedly installed on both sides of the bottom of the support base. A second rotating plate is rotatably arranged in the middle of one of the support legs. A second sliding groove is opened at one end of the second rotating plate, and the second sliding groove is slidably connected to a second lever.

[0012] A further technical improvement of the present invention is that: the top of the support base is provided with a lifting port, the lifting port is provided with a lifting plate, the top of the lifting plate is fixedly installed with an electric heating plate, and the bottom of the lifting plate is fixedly installed with a lifting frame. The bottom end of the lifting frame is rotatably provided with a roller, and the roller is in rolling connection with the end of the second rotating plate away from the second sliding groove.

[0013] A further technical improvement of the present invention is that: guide rods are fixedly installed on both sides of the bottom of the lifting plate, and the bottom ends of the two guide rods respectively movably pass through the middle of the two support legs, and the two guide rods are both arranged longitudinally. A tension spring is fixedly connected between the middle of the two support legs and the lifting plate; by turning off the blower and the control valve, and then controlling the extension end of the first cylinder to extend from the shortest to the longest, the square rod moves downward, and the first lever drives the first rotating plate to flip, so that the electric heating rod is close to the driving IC of the display module. During this process, the second lever drives the second rotating plate to flip, pushing the roller and the lifting frame to rise, so that the lifting plate drives the electric heating plate to approach the backlight of the display module, and the electric heating rod and the electric heating plate are turned on to heat the driving IC and the backlight of the display module, thereby effectively simulating that when the temperature of other parts of the display module is low, while the backlight and the driving IC are high, the light decay rate of the display module is tested by the testing fixture to see if it is qualified.

[0014] A further technical improvement of the present invention is that: the air-cooling mechanism includes a horizontal plate fixedly connected to the middle of the partition, a blower is fixedly installed on the top of the horizontal plate, the input end of the blower is fixedly inserted through the housing, and the output end of the blower is fixedly inserted through the partition.

[0015] A further technical improvement of the present invention is that: a rotary electric cylinder is fixedly provided on the side of the partition away from the blower, a baffle plate is rotatably provided at the output end of the rotary electric cylinder, and a sealing plate for blocking the output end of the blower is fixedly installed on the side of the baffle plate facing the partition.

[0016] A further technical improvement of the present invention is that: a detection fixture for detecting the light decay rate of the display module is fixedly installed on the side of the baffle plate. The detection fixture is existing technology, and the position of the detection fixture corresponds to the position of the support base. An exhaust pipe is connected to the side of the top of the housing away from the blower, and a control valve is fixedly installed in the middle of the exhaust pipe. By timely shutting off the electric heater, the rotating electric cylinder is controlled to drive the baffle plate to rotate, so that the baffle plate is set horizontally. The blower is turned on, and then the control valve, which is in the closed state, is opened, so that the airflow blown from the output end of the blower passes over the baffle plate, avoiding the airflow directly blowing onto the display module. The airflow carrying heat is blown out along the exhaust pipe. This process ensures rapid cooling of the inside of the housing while avoiding direct airflow onto the display module, which would cause local rapid cooling, generate thermal stress cracks or delamination, and affect the product quality of the display module.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In use, this invention involves shutting off the blower and control valve, then controlling the extension end of the first cylinder to extend from its shortest to its longest length, causing the square rod to move downwards. A first lever then rotates the first rotating plate, bringing the electric heating rod closer to the drive IC of the display module. During this process, a second lever rotates the second rotating plate, pushing the rollers and lifting frame upwards. This causes the lifting plate to bring the electric heating plate closer to the backlight panel of the display module, activating the electric heating rod and heating plate to heat the drive IC and backlight panel. This effectively simulates a situation where other parts of the display module have lower temperatures, while the backlight panel and drive IC are at high temperatures. The invention also allows for the detection of whether the light decay rate of the display module is within acceptable limits using a testing fixture.

[0019] In use, this invention involves promptly shutting off the electric heater, controlling the rotary cylinder to rotate the baffle plate so that it is horizontally positioned, turning on the blower, and then opening the control valve, which was in the closed state. This allows the airflow from the blower's output end to pass over the baffle plate, preventing the airflow from directly blowing onto the display module. The airflow carrying heat is then blown out along the exhaust pipe. This process ensures rapid cooling of the interior of the housing while also preventing direct airflow onto the display module, which could cause localized rapid cooling, thermal stress cracks, or delamination, thus affecting the product quality of the display module. Attached Figure Description

[0020] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 This is a three-dimensional schematic diagram of the heating mechanism structure of the present invention;

[0024] Figure 4 This is a three-dimensional schematic diagram of the support unit structure of the present invention;

[0025] Figure 5 This is a three-dimensional schematic diagram of the air-cooling mechanism structure of the present invention;

[0026] Figure 6 This is a three-dimensional schematic diagram of the light-blocking mechanism of the present invention.

[0027] In the diagram: 1. Multi-field color luminance meter; 2. Exhaust pipe; 3. Light-blocking mechanism; 4. Support plate; 5. Housing; 6. First sealing door; 7. Control panel; 8. Heating mechanism; 9. Air-cooling mechanism; 10. Electric heater; 11. Opening; 12. Partition; 31. Moving block; 32. Rubber block; 33. Second cylinder; 81. First cylinder; 82. First rotating plate; 83. Guide plate; 84. Electric heating rod; 85. Square rod; 86. Second lever; 87. Support unit; 88. Mounting frame; 89. First lever; 871. Lifting plate; 872. Guide rod; 873. Second rotating plate; 874. Lifting frame; 875. Support leg; 876. Support seat; 877. Electric heating plate; 91. Inspection fixture; 92. Sealing plate; 93. Wind baffle; 94. Rotary electric cylinder; 95. Horizontal plate; 96. Blower. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-6 As shown, a liquid crystal display module quality inspection device includes a housing 5. A longitudinally arranged partition 12 is fixedly installed inside the housing 5. A heating mechanism 8 for heating the display module area is provided on one side of the partition 12, and a wind-cooling mechanism 9 for cooling the inside of the housing 5 is provided on the other side of the partition 12.

[0030] Please see Figure 2 and Figure 3As shown, the heating mechanism 8 includes two guide plates 83 that are fixedly connected to the inner wall of the housing 5. A square rod 85 is movably inserted into the middle of the two guide plates 83. A support unit 87 for placing the display module is provided on the side of the square rod 85 facing the partition 12.

[0031] Please see Figure 3 and Figure 4 As shown, a first cylinder 81 arranged longitudinally is fixedly installed on the top of the aforementioned housing 5. The extended end of the first cylinder 81 is fixedly connected to the top end of the square rod 85. A first lever 89 is fixedly installed on the top of the square rod 85, and a second lever 86 is fixedly installed on the bottom of the square rod 85.

[0032] Please see Figure 3 As shown, a first rotating plate 82 is rotatably mounted on the inner wall of the aforementioned housing 5. A first sliding groove is provided in the middle of the first rotating plate 82. A first lever 89 is movably connected to the first sliding groove. A mounting bracket 88 is fixedly connected to one end of the first rotating plate 82 away from the inner wall of the housing 5. An electric heating rod 84 is fixedly mounted at the bottom of the mounting bracket 88. The position of the electric heating rod 84 corresponds to the position of the driver IC of the display module.

[0033] Please see Figure 3 and Figure 4 As shown, the aforementioned support unit 87 includes a support base 876 for placing the display module. Support legs 875 are fixedly installed on both sides of the bottom of the support base 876. A second rotating plate 873 is rotatably arranged in the middle of one of the support legs 875. A second sliding groove is provided at one end of the second rotating plate 873. The second sliding groove is slidably connected to the second lever 86.

[0034] Please see Figure 4 As shown, the top of the support base 876 is provided with a lifting port, and a lifting plate 871 is provided inside the lifting port. An electric heating plate 877 is fixedly installed on the top of the lifting plate 871, and a lifting frame 874 is fixedly installed on the bottom of the lifting plate 871. A roller is rotatably provided at the bottom end of the lifting frame 874, and the roller is rotatably connected to the end of the second rotating plate 873 away from the second slide groove.

[0035] Please see Figure 4As shown, guide rods 872 are fixedly installed on both sides of the bottom of the aforementioned lifting plate 871. The bottom ends of the two guide rods 872 respectively movably pass through the middle of the two support legs 875, and both guide rods 872 are arranged longitudinally. Tension springs are fixedly connected between the middle of the two support legs 875 and the lifting plate 871. By closing the blower 96 and the control valve, and then controlling the extension end of the first cylinder 81 to extend from its shortest to its longest length, the square rod 85 is driven to move downward. The first lever 89 drives the first rotating plate 82 to flip, so that the electric heating rod 8 4. When the driver IC of the display module is brought close, the second lever 86 drives the second rotating plate 873 to flip, pushing the roller and lifting frame 874 to rise. This causes the lifting plate 871 to bring the electric heating plate 877 close to the backlight of the display module. The electric heating rod 84 and the electric heating plate 877 are then turned on to heat the driver IC and backlight of the display module. This effectively simulates the situation where the temperature of other parts of the display module is low, while the backlight and driver IC are high. The light decay rate of the display module is then tested by the testing fixture 91 to determine if it is up to standard.

[0036] Please see Figure 2 and Figure 5 As shown, the aforementioned air-cooling mechanism 9 includes a horizontal plate 95 fixedly connected to the middle of the partition 12. A blower 96 is fixedly installed on the top of the horizontal plate 95. The input end of the blower 96 is fixedly inserted through the housing 5, and the output end of the blower 96 is fixedly inserted through the partition 12.

[0037] Please see Figure 5 As shown, a rotary electric cylinder 94 is fixedly installed on the side of the partition 12 away from the blower 96. A baffle plate 93 is rotatably installed at the output end of the rotary electric cylinder 94. A sealing plate 92 for blocking the output end of the blower 96 is fixedly installed on the side of the baffle plate 93 facing the partition 12. The size of the baffle plate 93 is larger than the size of the support base 876.

[0038] Please see Figure 5 As shown, a testing fixture 91 for detecting the light decay rate of the display module is fixedly installed on the side of the aforementioned baffle plate 93. The testing fixture 91 is existing technology, and the position of the testing fixture 91 corresponds to the position of the support base 876. An exhaust pipe 2 is connected to the top of the housing 5 away from the blower 96, and a control valve is fixedly installed in the middle of the exhaust pipe 2. By timely shutting off the electric heater 10, the rotary cylinder 94 is controlled to drive the baffle plate 93 to rotate, so that the baffle plate 93 is set horizontally. The blower 96 is turned on, and then the control valve, which is in the closed state, is opened, so that the airflow blown from the output end of the blower 96 passes over the baffle plate 93, avoiding the airflow from blowing directly onto the display module. The airflow carrying heat is blown out along the exhaust pipe 2. This process ensures rapid cooling of the inside of the housing 5, while also avoiding direct airflow to the display module, which would cause local rapid cooling, generate thermal stress cracks or delamination, and affect the product quality of the display module.

[0039] Please see Figure 2 , Figure 3 and Figure 6 As shown, the box 5 has an opening 11 on its side. The opening 11 is located near the square rod 85, and a support plate 4 for placing circuit boards is fixedly installed on the bottom of the inner wall of the opening 11. A light-blocking mechanism 3 for blocking light from the opening 11 is provided above the support plate 4.

[0040] Please see Figure 6 As shown, the light-blocking mechanism 3 includes a second cylinder 33 fixedly connected to the side of the housing 5. The second cylinder 33 is arranged longitudinally, and a moving block 31 is fixedly installed at the extended end of the second cylinder 33. The moving block 31 is slidably connected to the side of the housing 5 through a guide rail.

[0041] Please see Figure 6 As shown, the bottom of the aforementioned movable block 31 is fixedly embedded with a rubber block 32 for blocking the opening 11, and the size of the rubber block 32 is larger than the size of the opening 11.

[0042] Please see Figure 2 and Figure 6 As shown, a multi-field color luminance meter 1 is fixedly installed on the top of the aforementioned housing 5. The bottom of the multi-field color luminance meter 1 is fixedly installed through the housing 5, and the input end of the bottom of the multi-field color luminance meter 1 is set towards the support base 876. An electric heater 10 is fixedly installed on the inner wall of the housing 5 below the multi-field color luminance meter 1.

[0043] Please see Figure 1 As shown, a control panel 7 is also fixedly installed on the top of the aforementioned box 5. The control panel 7 is existing technology. A first sealing door 6 and a second sealing door are hinged to the front of the box 5.

[0044] Working Principle: In use, the circuit board is first placed on the support plate 4, the first sealing door 6 is opened, the display module is placed on top of the support base 876, and its flexible ribbon cable is passed through the opening 11 and inserted into the socket of the circuit board. The first sealing door 6 is then closed promptly. The extension end of the second cylinder 33 is extended to its maximum length via the manual operation control panel 7, causing the moving block 31 to drive the rubber block 32 downwards. This not only seals the opening 11, preventing external light from entering the housing 5, but also, through its own elasticity, avoids damage to the flexible ribbon cable while sealing the opening 11. The above operation method avoids interference from light on the detection of the display module. By turning on the electric heater 10, the air temperature inside the chamber 5 is heated. When the temperature inside the chamber 5 reaches the threshold, the multi-field color luminance meter 1 is turned on to facilitate the detection of the brightness and chromaticity values ​​of the display module under high temperature conditions. After completing the detection of the brightness and chromaticity values ​​of the display module, the electric heater 10 is turned off in time, and the rotary cylinder 94 is controlled to drive the baffle 93 to rotate, so that the baffle 93 is set horizontally. At this time, the detection fixture 91 is brought close to the display module, the blower 96 is turned on, and the control valve that is in the closed state is turned off. The blower 96 is opened, allowing the airflow from its output to pass over the baffle 93. The baffle 93 blocks the airflow, preventing it from directly hitting the display module. The heated airflow is then blown out along the exhaust pipe 2. This process ensures rapid cooling of the interior of the housing 5 while preventing direct airflow from the display module, which could cause localized rapid cooling, thermal stress cracks, or delamination, affecting the product quality of the display module. After rapid cooling of the interior of the housing 5 is complete, the blower 96 and control valve are closed. Then, the extension end of the first cylinder 81 is controlled to extend from its shortest to its longest length, causing the square rod 85 to move downwards. A lever 89 drives the first rotating plate 82 to flip, causing the electric heating rod 84 to approach the driver IC of the display module. During this process, the second lever 86 drives the second rotating plate 873 to flip, pushing the roller and lifting frame 874 to rise, causing the lifting plate 871 to bring the electric heating plate 877 closer to the backlight of the display module. The electric heating rod 84 and the electric heating plate 877 are turned on to heat the driver IC and backlight of the display module, thereby effectively simulating the situation where the temperature of other parts of the display module is low, while the backlight and driver IC are high. The light decay rate of the display module is then tested by the testing fixture 91 to determine whether it is qualified.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A quality inspection device for a liquid crystal display module, comprising a housing (5), wherein a partition (12) is fixedly installed inside the housing (5), characterized in that: A heating mechanism (8) for heating the display module area is provided on one side of the partition (12), and a cooling mechanism (9) for cooling the inside of the cabinet (5) is provided on the other side of the partition (12). The heating mechanism (8) includes two guide plates (83) fixedly connected to the inner wall of the box (5). A square rod (85) is movably inserted in the middle of the two guide plates (83). A support unit (87) for placing the display module is provided on the side of the square rod (85) facing the partition (12). A first cylinder (81) is fixedly installed on the top of the box (5). The extended end of the first cylinder (81) is fixedly connected to the square rod (85). A first lever (89) is fixedly installed on the top of the square rod (85), and a second lever (86) is fixedly installed on the bottom of the square rod (85). A first rotating plate (82) is rotatably mounted on the inner side wall of the housing (5). A first sliding groove is provided in the middle of the first rotating plate (82). The first lever (89) is movably connected to the first sliding groove. A mounting bracket (88) is fixedly connected to one end of the first rotating plate (82). An electric heating rod (84) is fixedly mounted at the bottom end of the mounting bracket (88). The position of the electric heating rod (84) corresponds to the position of the driving IC of the display module. The support unit (87) includes a support base (876) for placing the display module. Support legs (875) are fixedly installed on both sides of the bottom of the support base (876). A second rotating plate (873) is rotatably arranged in the middle of one of the support legs (875). A second sliding groove is opened at one end of the second rotating plate (873). The second sliding groove is slidably connected to the second lever (86). The support base (876) has a lifting port at the top, and a lifting plate (871) is provided inside the lifting port. An electric heating plate (877) is fixedly installed on the top of the lifting plate (871), and a lifting frame (874) is fixedly installed on the bottom of the lifting plate (871). A roller is rotatably provided at the bottom end of the lifting frame (874), and the roller is rotatably connected to the end of the second rotating plate (873) away from the second slide groove. Guide rods (872) are fixedly installed on both sides of the bottom of the lifting plate (871). The bottom ends of the two guide rods (872) respectively movably pass through the middle of the two support legs (875), and the two guide rods (872) are arranged longitudinally. A tension spring is fixedly connected between the middle of the two support legs (875) and the lifting plate (871).

2. The liquid crystal display module quality inspection device according to claim 1, characterized in that, The air-cooling mechanism (9) includes a horizontal plate (95) fixedly connected to the middle of the partition (12). A blower (96) is fixedly installed on the top of the horizontal plate (95). The input end of the blower (96) is fixedly inserted through the housing (5), and the output end of the blower (96) is fixedly inserted through the partition (12).

3. The liquid crystal display module quality inspection device according to claim 2, characterized in that, A rotary electric cylinder (94) is fixedly installed on the side of the partition (12) away from the blower (96). A baffle plate (93) is rotatably installed at the output end of the rotary electric cylinder (94). A sealing plate (92) for blocking the output end of the blower (96) is fixedly installed on the side of the baffle plate (93) facing the partition (12).

4. The liquid crystal display module quality inspection device according to claim 3, characterized in that, The side of the baffle plate (93) is fixedly provided with a testing fixture (91) for detecting the light decay rate of the display module. The position of the testing fixture (91) corresponds to the position of the support base (876). The top of the box (5) away from the blower (96) is connected to an exhaust pipe (2). A control valve is fixedly installed in the middle of the exhaust pipe (2).

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