Liquid crystal screen backlight module testing device
By designing the LCD screen backlight module test device with limit structure and guide structure, automated testing is realized, the problems of manpower consumption and test errors are solved, and the reliability and safety of the test are improved.
Patent Information
- Application Number
- CN202422186001.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The existing LCD screen backlight module test device requires the operator to hold a pen and connect the rear plug of the LCD screen backlight module to determine whether it is qualified, resulting in serious labor consumption, easy to damage the module, and lack of insurance measures to lead to test errors.
A test device for backlight module of LCD screen is designed, adopting a limit structure, a guide structure and a test structure. It can automatically turn on the spring limit ring and switch contacts through the guide plate, and is equipped with optical fiber wires and a light shield to prevent misjudgment and protect operators.
The automated testing process is realized, reducing manpower consumption, avoiding module damage, and improving the reliability and safety of the test through dual circuit detection, preventing glaring light.
Smart Images
Figure CN223155125U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal screen backlight module production, in particular to a liquid crystal screen backlight module testing device. Background Art
[0002] The backlight module is one of the key components of the LCD panel. After production, it needs to be tested to determine whether the product can emit light normally. Its function is to provide sufficient brightness and evenly distributed light so that it can display images normally. The so-called backlight is a light source located behind the LCD. Its luminous effect will directly affect the visual effect of the LCD display module. The liquid crystal itself does not emit light. It displays graphics or characters as a result of its modulation of light.
[0003] The existing LCD backlight module testing device requires an operator to hold an electric pen and connect it to the tail plug of the LCD backlight module to determine whether the LCD backlight module is qualified. This consumes a lot of manpower. Once the operator connects to the negative pole, it is easy to damage the LCD backlight module. The existing LCD backlight module testing device has no insurance measures. Once the test circuit is damaged, test errors are likely to occur. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a liquid crystal backlight module testing device. The existing liquid crystal backlight module testing device requires an operator to hold an electric pen and connect it to the tail plug of the liquid crystal backlight module to determine whether the liquid crystal backlight module is qualified. This consumes a lot of manpower. Once the operator connects the negative pole, it is easy to damage the liquid crystal backlight module. The existing liquid crystal backlight module testing device has no insurance measures. Once the test circuit is damaged, test errors are likely to occur.
[0005] In order to solve the above technical problems, the technical solution of the utility model is a liquid crystal screen backlight module testing device, comprising a liquid crystal screen backlight module body, a tail plug contact and a fixing seat, the tail plug contact is installed on the lower wall surface of the liquid crystal screen backlight module body, the fixing seat is installed below the liquid crystal screen backlight module body, the upper wall surface of the fixing seat is installed with four limit pins, the upper wall surface of the fixing seat is installed with two contact switches, the upper wall surface of the fixing seat is installed with a limit structure, the inner wall surface of the limit structure is installed with a guide structure, the upper wall surface of the fixing seat is installed with a test structure, and the upper wall surface of the fixing seat is installed with a powered contact.
[0006] As a further solution of the utility model: the limiting structure includes: two module limiting blocks, two main body limiting grooves and four auxiliary limiting grooves; the two module limiting blocks are respectively installed on the upper wall surface of the fixed seat, the two main body limiting grooves are respectively opened in the center of the two module limiting blocks, and the four auxiliary limiting grooves are respectively opened at both ends of the two module limiting blocks.
[0007] As a further solution of the present utility model: the guiding structure includes: two guiding plates, two main guiding blocks, four auxiliary guiding blocks and four spring limiting rings; the two guiding plates are respectively installed on the inner wall surfaces of the two module limiting blocks, the two main guiding blocks are respectively installed on the inner wall surfaces of the two main limiting grooves and are connected to the two guiding plates, the four auxiliary guiding blocks are respectively installed on the inner wall surfaces of the four auxiliary limiting grooves and are connected to the two guiding plates, and the four spring limiting rings are respectively installed on the lower wall surfaces of the two guiding plates.
[0008] As a further solution of the present utility model: the testing structure includes: an optical fiber line, an optical fiber limiting block, an optical fiber fixing frame, a perspective lens, a light shielding frame and a light shielding cover; the optical fiber line is installed on the upper wall surface of the fixed seat, the optical fiber limiting block is sleeved on the outer wall surface of the optical fiber line and is connected to the fixed seat, the optical fiber fixing frame is sleeved on the outer wall surface of the optical fiber line, the perspective lens is installed on the inner wall surface of the optical fiber fixing frame, the light shielding frame is sleeved on the outer wall surface of the optical fiber line, and the light shielding cover is installed on the upper wall surface of the light shielding frame.
[0009] As a further solution of the present utility model: return springs are respectively sleeved on the outer wall surfaces of the four limit pins.
[0010] As a further solution of the present utility model: switch contacts are respectively installed on the lower wall surfaces of the two guiding plates.
[0011] As a further solution of the present utility model: the light shielding cover is made of 2-mm light-shielding ABS material.
[0012] The present utility model adopts the above technical solutions and has the following advantages compared with the prior art:
[0013] The two guiding plates drive the four spring limiting rings to compress the return springs. At the same time, the two guiding plates drive the two switch contacts to move downward, the two switch contacts drive the two contact switches to trigger, and the energized contacts are energized when the two contact switches are triggered. When the tail plug contact contacts the energized contact, the main body of the LCD backlight module is energized. At the same time, the main body of the LCD backlight module contacts the optical fiber fixing frame. If the test is qualified, the main body of the LCD backlight module emits light. If it is unqualified, the main body of the LCD backlight module does not emit light, solving the problem that the existing LCD backlight module testing device requires the operator to hold an electric pen and connect it to the tail plug of the LCD backlight module to judge whether the LCD backlight module is qualified, which consumes a great deal of manpower and is likely to damage the LCD backlight module once the operator reverses the positive and negative poles.
[0014] During the test, if the circuit of one contact switch is damaged, the light of the LCD backlight module body will become dim due to insufficient current. Through the dual-circuit detection, the detection is more secure. The operator can repair the circuit, solving the problem that the existing LCD backlight module test device has no insurance measures and is prone to test errors once the test circuit is damaged.
[0015] When the LCD backlight module body emits light, the light passes through the perspective lens and is conducted along the optical fiber line to the light-shielding cover. The light-shielding cover makes the light softer and prevents it from stabbing the operator's eyes. The operator can judge whether the LCD backlight module body is qualified according to whether the light-shielding cover lights up. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of a test device for an LCD backlight module in an embodiment of the present invention;
[0017] Figure 2 It is a schematic diagram of the limiting structure of a test device for an LCD backlight module in an embodiment of the present invention;
[0018] Figure 3 It is a schematic diagram of the guiding structure of a test device for an LCD backlight module in an embodiment of the present invention;
[0019] Figure 4 It is a schematic diagram of the test structure of a test device for an LCD backlight module in an embodiment of the present invention.
[0020] In the figure: 1. LCD backlight module body; 2. Tail plug contact; 3. Fixed seat; 4. Limiting nail; 5. Contact switch; 6. Module limiting block; 7. Main body limiting groove; 8. Auxiliary limiting groove; 9. Guide plate; 10. Main body guide block; 11. Auxiliary guide block; 12. Spring limiting ring; 13. Optical fiber line; 14. Optical fiber limiting block; 15. Optical fiber fixing bracket; 16. Perspective lens; 17. Light-shielding frame; 18. Light-shielding cover; 19. Return spring; 20. Switch contact; 21. Energized contact. Detailed Embodiments
[0021] The following further describes the detailed embodiments of the present invention with reference to the drawings. It should be noted here that the description of these embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0022] Embodiment 1, please refer to Figures 1-4, A liquid crystal display backlight module testing device, including a liquid crystal display backlight module main body 1, a tail plug contact 2, and a fixing base 3. The tail plug contact 2 is installed on the lower wall surface of the liquid crystal display backlight module main body 1, the fixing base 3 is installed below the liquid crystal display backlight module main body 1, four limit pins 4 are installed on the upper wall surface of the fixing base 3, two contact switches 5 are installed on the upper wall surface of the fixing base 3, a limiting structure is installed on the upper wall surface of the fixing base 3, a guiding structure is installed on the inner wall surface of the limiting structure, a testing structure is installed on the upper wall surface of the fixing base 3, and a power-on contact 21 is installed on the upper wall surface of the fixing base 3.
[0023] Please refer to Figure 2 , The limiting structure includes: two module limiting blocks 6, two main body limiting grooves 7, and four auxiliary limiting grooves 8; the two module limiting blocks 6 are respectively installed on the upper wall surface of the fixing base 3, the two main body limiting grooves 7 are respectively opened at the central positions inside the two module limiting blocks 6, and the four auxiliary limiting grooves 8 are respectively opened at both ends inside the two module limiting blocks 6.
[0024] Please refer to Figure 3 , The guiding structure includes: two guiding plates 9, two main body guiding blocks 10, four auxiliary guiding blocks 11, and four spring limiting rings 12; the two guiding plates 9 are respectively installed on the inner wall surfaces of the two module limiting blocks 6, the two main body guiding blocks 10 are respectively installed on the inner wall surfaces of the two main body limiting grooves 7 and are connected to the two guiding plates 9, the four auxiliary guiding blocks 11 are respectively installed on the inner wall surfaces of the four auxiliary limiting grooves 8 and are connected to the two guiding plates 9, and the four spring limiting rings 12 are respectively installed on the lower wall surfaces of the two guiding plates 9.
[0025] Please refer to Figure 3 , A reset spring 19 is respectively sleeved on the outer wall surfaces of the four limit pins 4. In this embodiment, the power-on contact 21 is controlled to be powered on or off by the reset spring 19.
[0026] Please refer to Figure 3 , Switch contacts 20 are respectively installed on the lower wall surfaces of the two guiding plates 9. In this embodiment, the two contact switches 5 are driven to trigger by the two switch contacts 20, and the power-on contact 21 is powered on when the two contact switches 5 trigger.
[0027] In this embodiment, two guiding plates 9 drive four spring limiting rings 12 to compress the return spring 19. At the same time, the two guiding plates 9 drive two switch contacts 20 to move downward. The two switch contacts 20 drive two contact switches 5 to be triggered. When the two contact switches 5 are triggered, the energized contact 21 is energized. When the tail plug contact 2 contacts the energized contact 21, the liquid crystal display backlight module main body 1 is energized. At the same time, the liquid crystal display backlight module main body 1 contacts the light guide fixing bracket 15. If the test is qualified, the liquid crystal display backlight module main body 1 emits light. If it is unqualified, the liquid crystal display backlight module main body 1 does not emit light. During this period, if the circuit of one of the contact switches 5 is damaged, the light of the liquid crystal display backlight module main body 1 will become dim due to insufficient current, and the operator can repair the circuit.
[0028] Specifically, the operator places the liquid crystal display backlight module main body 1 on the two guiding plates 9 along the two module limiting blocks 6, and then presses down the liquid crystal display backlight module main body 1. The liquid crystal display backlight module main body 1 drives the two guiding plates 9 to move downward. The two guiding plates 9 drive two main body guiding blocks 10 and four auxiliary guiding blocks 11 to move downward along the two main body limiting grooves 7 and the four auxiliary limiting grooves 8 respectively. During this period, the two guiding plates 9 drive four spring limiting rings 12 to compress the return spring 19. At the same time, the two guiding plates 9 drive two switch contacts 20 to move downward. The two switch contacts 20 drive two contact switches 5 to be triggered. When the two contact switches 5 are triggered, the energized contact 21 is energized. When the tail plug contact 2 contacts the energized contact 21, the liquid crystal display backlight module main body 1 is energized. At the same time, the liquid crystal display backlight module main body 1 contacts the light guide fixing bracket 15. If the test is qualified, the liquid crystal display backlight module main body 1 emits light. If it is unqualified, the liquid crystal display backlight module main body 1 does not emit light. Then the operator releases the hand, the return spring 19 resets, drives the two switch contacts 20 to reset through the two guiding plates 9, the two switch contacts 20 disengage from the two contact switches 5, the two contact switches 5 reset, the energized contact 21 is de-energized, and the four limit pins 4 are used to limit the position of the return spring 19. Finally, the operator removes the liquid crystal display backlight module main body 1. During this period, if the circuit of one of the contact switches 5 is damaged, the light of the liquid crystal display backlight module main body 1 will become dim due to insufficient current, and the operator can repair the circuit.
[0029] Embodiment 2, please refer to Figures 1-4 , the test structure includes: an optical fiber line 13, an optical fiber limiting block 14, an optical fiber fixing bracket 15, a perspective lens 16, a light shielding bracket 17, and a light shielding cover 18; the optical fiber line 13 is installed on the upper wall surface of the fixed seat 3, the optical fiber limiting block 14 is sleeved on the outer wall surface of the optical fiber line 13 and is connected to the fixed seat 3, the optical fiber fixing bracket 15 is sleeved on the outer wall surface of the optical fiber line 13, the perspective lens 16 is installed on the inner wall surface of the optical fiber fixing bracket 15, the light shielding bracket 17 is sleeved on the outer wall surface of the optical fiber line 13, and the light shielding cover 18 is installed on the upper wall surface of the light shielding bracket 17.
[0030] Please refer to Figure 4 , the light shield 18 is made of 2-mm light-shielding ABS material. In this embodiment, by using the 2-mm light-shielding ABS material, the light becomes softer and prevents the operator's eyes from being stabbed.
[0031] In this embodiment, when the LCD backlight module main body 1 emits light, the light passes through the perspective lens 16 and is conducted along the optical fiber line 13 to the light shield 18. The light shield 18 makes the light softer and prevents the operator's eyes from being stabbed. The operator can judge whether the LCD backlight module main body 1 is qualified according to whether the light shield 18 lights up.
[0032] Specifically, when the LCD backlight module main body 1 emits light, the light passes through the perspective lens 16 and is conducted along the optical fiber line 13 to the light shield 18. The light shield 18 makes the light softer and prevents the operator's eyes from being stabbed. The operator can judge whether the LCD backlight module main body 1 is qualified according to whether the light shield 18 lights up. The optical guide fixing frame 15 is used to fix the perspective lens 16, the light shield fixing frame 17 is used to fix the light shield 18, and the optical guide limiting block 14 is used to fix the optical fiber line 13.
[0033] The above has described the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.
Claims
1. A liquid crystal display backlight module testing device, comprising a liquid crystal display backlight module main body (1), a tail plug contact (2) and a fixing base (3), characterized in that, The tail plug contact (2) is installed on the lower wall surface of the liquid crystal display backlight module body (1), the fixing base (3) is installed below the liquid crystal display backlight module body (1), four limit pins (4) are installed on the upper wall surface of the fixing base (3), two contact switches (5) are installed on the upper wall surface of the fixing base (3), a limiting structure is installed on the upper wall surface of the fixing base (3), a guiding structure is installed on the inner wall surface of the limiting structure, a testing structure is installed on the upper wall surface of the fixing base (3), and a power-on contact (21) is installed on the upper wall surface of the fixing base (3).
2. The liquid crystal display backlight module testing device according to claim 1, characterized in that, The limiting structure includes: two module limiting blocks (6), two main body limiting grooves (7), and four auxiliary limiting grooves (8); The two module limiting blocks (6) are respectively installed on the upper wall surface of the fixing base (3), the two main body limiting grooves (7) are respectively opened at the central parts inside the two module limiting blocks (6), and the four auxiliary limiting grooves (8) are respectively opened at the two ends inside the two module limiting blocks (6).
3. The liquid crystal display backlight module testing device according to claim 2, wherein, The guiding structure includes: two guiding plates (9), two main body guiding blocks (10), four auxiliary guiding blocks (11), and four spring limiting rings (12); The two guiding plates (9) are respectively installed on the inner wall surfaces of the two module limiting blocks (6), the two main body guiding blocks (10) are respectively installed on the inner wall surfaces of the two main body limiting grooves (7) and are connected to the two guiding plates (9), the four auxiliary guiding blocks (11) are respectively installed on the inner wall surfaces of the four auxiliary limiting grooves (8) and are connected to the two guiding plates (9), and the four spring limiting rings (12) are respectively installed on the lower wall surfaces of the two guiding plates (9).
4. A liquid crystal display backlight module testing device according to claim 1, characterized in that The testing structure includes: an optical fiber line (13), an optical fiber limiting block (14), an optical fiber fixing bracket (15), a perspective lens (16), a light shielding bracket (17), and a light shielding cover (18); The optical fiber line (13) is installed on the upper wall surface of the fixing base (3), the optical fiber limiting block (14) is sleeved on the outer wall surface of the optical fiber line (13) and is connected to the fixing base (3), the optical fiber fixing bracket (15) is sleeved on the outer wall surface of the optical fiber line (13), the perspective lens (16) is installed on the inner wall surface of the optical fiber fixing bracket (15), the light shielding bracket (17) is sleeved on the outer wall surface of the optical fiber line (13), and the light shielding cover (18) is installed on the upper wall surface of the light shielding bracket (17).
5. The test device for a liquid crystal display backlight module according to claim 1, characterized in that, Reset springs (19) are respectively sleeved on the outer wall surfaces of the four limit pins (4).
6. The test device for a liquid crystal display backlight module according to claim 3, wherein Switch contacts (20) are respectively installed on the lower wall surfaces of the two guiding plates (9).
7. A liquid crystal display backlight module testing device according to claim 4, characterized in that, The light shielding cover (18) is made of a 2-mm light shielding ABS material.