Backlight module detection system and detection method thereof

Abstract

The present invention relates to the field of backlight module detection technology, and in particular to a backlight module detection system, comprising a box body, an operating table is fixedly provided at the upper end of the side wall of the box body, a support frame is fixedly installed at the upper end of the operating table, a detection lens facing the box body is installed at the lower end of the horizontal rod body of the support rod, a floating block is placed inside the box body, a vertical rod is fixedly installed at the upper end of the floating block, a horizontally arranged pressure plate is fixedly installed at the upper end of the vertical rod, a pressure sensor is embedded and installed at the upper end of the pressure plate, an air exchange port and a water inlet are provided at the upper end of the side wall of the box body, and a water outlet is provided at the lower end of the box body. In this detection system, the fixing process is convenient and simple, and a vacuum pump is connected to the air exchange port to evacuate the interior of the box body, and pressure is applied to the backlight module through the pressure plate. Then, the detection lens is opened to detect the backlight module. The process of applying pressure to the backlight module is convenient and simple, and effectively improves the detection efficiency and accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of backlight module detection, and in particular to a backlight module detection system and a detection method thereof. Background Art

[0002] As a part of LCM (Liquid Crystal Model), the backlight module is mainly used to provide a light source for the LCD module. It has very stringent requirements on the environment during the production process, and it must also be inspected for impurities before leaving the factory. Once impurities are present, black spots may appear on the LCM, affecting the display effect.

[0003] There is a certain gap between the layers of the backlight module, and there will be certain impurities in the gap. It is often difficult to find these impurities when the backlight module is lit for testing. Therefore, it is necessary to press the backlight module during testing to reduce the gap between the layers of the backlight module, so that the impurities in the gap can be easily found during the lighting test.

[0004] At present, when conducting such inspections, staff often use pressure blocks to perform local pressing. However, during manual inspections, the applied pressure cannot be evenly controlled, and only local pressure can be applied each time, which can easily cause the light-emitting surface to be missed or impurities to be unable to be detected, affecting product quality. Therefore, we propose a backlight module inspection system and inspection method. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a backlight module detection system and a detection method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A backlight module detection system includes a box body, an operating table is fixedly installed on the upper end of the side wall of the box body, a support frame is fixedly installed on the upper end of the operating table, a detection lens facing the box body is installed on the lower end of the horizontal rod body of the support rod, a floating block is placed inside the box body, a vertical rod is fixedly installed on the upper end of the floating block, a horizontally arranged pressure plate is fixedly installed on the upper end of the vertical rod, a pressure sensor is embedded in the upper end of the pressure plate, a ventilation port and a water inlet are provided on the upper end of the side wall of the box body, a water outlet is provided at the lower end of the box body, a supporting ring for placing the backlight module is fixedly provided on the inner wall of the box body opening, and a pressure ring is also provided at the upper end of the box body, the backlight module is fixed by the pressure ring and the supporting ring, so that a sealing surface is formed between the pressure ring and the supporting ring.

[0008] Preferably, an iron block is embedded in the lower end of the floating block, and an electromagnet for driving the iron block to move is installed at the lower end of the box.

[0009] Preferably, a support leg is fixedly installed at the lower end of the box, an X-axis drive motor is installed on the support leg, a support plate is installed on the slide of the X-axis drive motor, a Y-axis drive motor is installed on the upper end of the support plate, and the electromagnet is installed on the slide of the Y-axis drive motor.

[0010] Preferably, a soft pad is fixedly provided on the upper end of the pressing plate.

[0011] Preferably, a sealing ring is provided on the side of the pressure ring and the support ring close to the backlight module.

[0012] Preferably, a vertically arranged cylinder is fixedly mounted on the lower end of the horizontal rod of the support frame, a pressure block is mounted on the lower end of the cylinder, and the lower end surface of the pressure block is matched with the upper end surface of the pressure ring.

[0013] Preferably, an air pressure sensor is provided on the inner side wall of the box.

[0014] Preferably, a backlight module detection method, using the above-mentioned backlight module detection system, comprises the following steps:

[0015] Step 1: Place the backlight module to be tested on the support ring, place the pressure ring, start the cylinder, and fix the backlight module through the pressure ring and the support ring;

[0016] Step 2: Connect the vacuum pump to the ventilation port to evacuate the inside of the box;

[0017] Step 3: Adjust the depth of the tank liquid level according to the reading of the pressure sensor;

[0018] Step 4: Open the detection lens to detect the backlight module;

[0019] Step 5: After one area of the backlight module has been inspected, the electromagnet is driven to move, the position of the pressure plate is changed, and the pressure plate is used to press different areas of the backlight module for a full range of inspection.

[0020] Preferably, in step 1, when the backlight module to be tested is placed on the supporting ring, the height of the uppermost end of the pressing plate is lower than the height of the uppermost end of the box.

[0021] The beneficial effects of the present invention are:

[0022] 1. In this detection system, during operation, first place the backlight module on the support ring, place the pressure ring, start the cylinder, and fix the backlight module through the pressure ring and the support ring. The fixing process is convenient and simple;

[0023] 2. Connect the vacuum pump to the ventilation port to evacuate the interior of the box, causing the backlight module to shrink toward the box. According to the reading of the pressure sensor, adjust the depth of the box liquid level, apply pressure to the backlight module through the pressure plate, and then open the detection lens to detect the backlight module. The process of applying pressure to the backlight module is convenient and simple, effectively improving the detection efficiency and accuracy.

[0024] 3. When one area of the backlight module is inspected, the electromagnet is driven to move, the electromagnet attracts the iron block, changes the position of the pressure plate, and presses different areas of the backlight module through the pressure plate to perform a full range of inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main cross-section structure of a backlight module detection system proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the top view of the operating table of the backlight module detection system proposed by the present invention;

[0027] Figure 3 A backlight module detection system proposed by the present invention Figure 1 A in the middle is an enlarged structural diagram;

[0028] Figure 4 This is a structural schematic diagram of a floating block and a pressing plate of a backlight module detection system proposed by the present invention.

[0029] In the figure: 1 box, 2 operating table, 3 support frame, 4 detection lens, 5 cylinder, 6 pressure block, 7 pressure ring, 8 support leg, 9 X-axis drive motor, 10 Y-axis drive motor, 11 electromagnet, 12 float block, 13 iron block, 14 vertical rod, 15 pressure plate, 16 pressure sensor, 17 cushion, 18 support ring, 19 sealing ring, 20 backlight module, 21 water inlet, 22 water outlet, 23 ventilation port. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-4, a backlight module detection system includes a box body 1, an operating table 2 is fixedly provided at the upper end of the side wall of the box body 1, a support frame 3 is fixedly installed at the upper end of the operating table 2, and a detection lens 4 facing the box body 1 is installed at the lower end of the horizontal rod body of the support rod 3, a floating block 12 is placed inside the box body 1, the upper end of the floating block 12 is fixedly installed with a vertical rod 14, the upper end of the vertical rod 14 is fixedly installed with a horizontally arranged pressure plate 15, and the upper end of the pressure plate 15 is embedded with a pressure sensor 16. The upper end of the side wall of the box body 1 is provided with a ventilation port 23 and a water inlet 21, and the lower end of the box body 1 is provided with a water outlet 22. A supporting ring 18 for placing the backlight module 20 is fixedly provided on the inner wall of the opening of the box body 1. A pressure ring 7 is also provided at the upper end of the box body 1, and the backlight module 20 is fixed by the pressure ring 7 and the supporting ring 18, so that a sealing surface is formed between the pressure ring 7 and the supporting ring 18 of the backlight module 20.

[0032] An iron block 13 is embedded in the lower end of the floating block 12 , and the outer side of the iron block 13 is coated with an anti-corrosion coating. An electromagnet 11 for driving the iron block 13 to move is installed at the lower end of the box body 1 .

[0033] A support leg 8 is fixedly installed at the lower end of the box body 1, an X-axis drive motor 9 is installed on the support leg 8, a support plate is installed on the slide of the X-axis drive motor 9, a Y-axis drive motor 10 is installed on the upper end of the support plate, and the electromagnet 11 is installed on the slide of the Y-axis drive motor 10. The electromagnet 11 is driven by the X-axis drive motor 9 and the Y-axis drive motor 10 to move in the X-axis and Y-axis directions.

[0034] A soft pad 17 is fixedly provided on the upper end of the pressing plate 15 , and the soft pad 17 can cushion and protect the photovoltaic module 20 .

[0035] A sealing ring 19 is provided on one side of the pressure ring 7 and the support ring 18 close to the backlight module 20 .

[0036] A vertically arranged cylinder 5 is fixedly mounted on the lower end of the horizontal rod of the support frame 3 , and a pressure block 6 is mounted on the lower end of the cylinder 5 , the lower end surface of the pressure block 6 is adapted to the upper end surface of the pressure ring 7 .

[0037] An air pressure sensor is provided on the inner wall of the box body 1 , and the air pressure value inside the box body 1 can be obtained through the air pressure sensor.

[0038] A backlight module detection method, using the above-mentioned backlight module detection system, includes the following steps:

[0039] Step 1: Place the backlight module 20 to be tested on the support ring 18, place the pressure ring 7, start the cylinder 5, and fix the backlight module 20 through the pressure ring 7 and the support ring 18;

[0040] Step 2: Connect the vacuum pump to the ventilation port 23 to evacuate the interior of the box 1;

[0041] Step 3: Adjust the depth of the liquid level in the tank 1 according to the reading of the pressure sensor 16;

[0042] Step 4: Open the detection lens 4 to detect the backlight module 20, apply pressure to the backlight module 20 through the pressure plate 15, and then open the detection lens 4 to detect the backlight module 20. The process of applying pressure to the backlight module 20 is convenient and simple, and effectively improves the detection efficiency and accuracy;

[0043] Step 5: After one area of the backlight module 20 is inspected, the electromagnet 11 is driven to move, and the electromagnet 11 attracts the iron block 13, changes the position of the pressing plate 15, and presses different areas of the backlight module 20 through the pressing plate 15 to perform a full range of inspections.

[0044] In step 1, when the backlight module 20 to be tested is placed on the supporting ring 18 , the height of the uppermost end of the pressing plate 15 is lower than the height of the uppermost end of the box 1 .

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A backlight module detection system, comprising a box (1), an operating table (2) fixedly provided at the upper end of a side wall of the box (1), a support frame (3) fixedly installed at the upper end of the operating table (2), a detection lens (4) facing the box (1) installed at the lower end of a horizontal rod of the support frame (3), characterized in that: A floating block (12) is placed inside the box (1), a vertical rod (14) is fixedly installed on the upper end of the floating block (12), a horizontally arranged pressure plate (15) is fixedly installed on the upper end of the vertical rod (14), and a pressure sensor (16) is embedded in the upper end of the pressure plate (15). A ventilation port (23) and a water inlet (21) are provided at the upper end of the side wall of the box (1), and a water outlet (22) is provided at the lower end of the box (1). A supporting ring (18) for placing a backlight module (20) is fixedly provided on the inner wall of the opening of the box (1), and a pressure ring (7) is further provided at the upper end of the box (1). The backlight module (20) is fixed by the pressure ring (7) and the supporting ring (18), so that a sealing surface is formed between the pressure ring (7) and the supporting ring (18) of the backlight module (20).

2. The backlight module detection system according to claim 1, characterized in that: An iron block (13) is embedded in the lower end of the floating block (12), and an electromagnet (11) for driving the iron block (13) to move is installed at the lower end of the box (1).

3. The backlight module detection system according to claim 2, characterized in that: A support leg (8) is fixedly mounted on the lower end of the box body (1), an X-axis drive motor (9) is mounted on the support leg (8), a support plate is mounted on the slide of the X-axis drive motor (9), a Y-axis drive motor (10) is mounted on the upper end of the support plate, and the electromagnet (11) is mounted on the slide of the Y-axis drive motor (10).

4. The backlight module detection system according to claim 3, characterized in that: A soft pad (17) is fixedly provided on the upper end of the pressing plate (15).

5. The backlight module detection system according to claim 4, characterized in that: A sealing ring (19) is provided on one side of the pressure ring (7) and the support ring (18) close to the backlight module (20).

6. The backlight module detection system according to claim 4, characterized in that: A vertically arranged cylinder (5) is fixedly mounted on the lower end of the horizontal rod of the support frame (3), and a pressure block (6) is mounted on the lower end of the cylinder (5), wherein the lower end surface of the pressure block (6) is adapted to the upper end surface of the pressure ring (7).

7. The backlight module detection system according to claim 4, characterized in that: An air pressure sensor is provided on the inner side wall of the box body (1).

8. A backlight module detection method, characterized in that: The backlight module detection system according to any one of claims 1 to 7 comprises the following steps: Step 1: Place the backlight module (20) to be tested on the support ring (18), place the pressure ring (7), start the cylinder (5), and fix the backlight module (20) through the pressure ring (7) and the support ring (18); Step 2: Connect the vacuum pump to the ventilation port (23) to evacuate the interior of the box (1); Step 3: Adjust the depth of the liquid level in the tank (1) according to the reading of the pressure sensor (16); Step 4: Open the detection lens (4) to detect the backlight module (20); Step 5: After one area of the backlight module (20) has been inspected, the electromagnet (11) is driven to move, the position of the pressure plate (15) is changed, and different areas of the backlight module (20) are pressed by the pressure plate (15) to perform a full range of inspection.

9. The backlight module detection method according to claim 8, characterized in that: In the step 1, when the backlight module (20) to be tested is placed on the support ring (18), the height of the uppermost end of the pressing plate (15) is lower than the height of the uppermost end of the box (1).

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