Horizontal pin LCD testing device

Abstract

The utility model discloses a horizontal tube foot LCD testing arrangement, by fixed platform, pressing plate, a pair of pneumatic connecting rod, pneumatic actuator and pneumatic switch composition. Electric test board and the horizontal tube foot LCD of waiting for measuring are in same fixed platform, and the pressing plate is driven under the vertical downward movement of pneumatic actuator, and through the down pressure makes each tube foot of the horizontal tube foot LCD of waiting for measuring and each electric test lead of electric test board one -to -one corresponding close pasting. The utility model can solve the current electric measuring device based on the current electric performance test of horizontal tube foot LCD when being directly used to the horizontal tube foot LCD of vertical tube foot LCD design existing's tube foot of horizontal tube foot LCD and the deformation of impact, and the contact of electric test lead of electric test board and the tube foot of LCD is not good or misplacement etc. caused by various reasons to guarantee the accuracy of horizontal tube foot LCD electric performance test result, and has simple operation and the advantages such as high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display technology, specifically to a horizontal pin LCD testing device. Background Technology

[0002] An LCD (Liquid Crystal Display) consists of a liquid crystal panel and pins. The pins are made of copper, a metal known for its toughness and stability. During manufacturing, the front end is connected to the step on the liquid crystal panel, and the rear end is connected to the client's PCB during use, primarily serving the functions of connection, fixation, and conductivity. In the LCD manufacturing process, to ensure LCD quality, electrical performance testing is performed using electrical testing equipment. Current electrical testing equipment is designed based on vertically pinned LCDs. Since the pin extension direction of a vertically pinned LCD is perpendicular to the display surface of the liquid crystal panel, current electrical testing equipment includes two relatively independent and perpendicularly oriented platforms: a horizontal product fixing platform for fixing the LCD under test, and a vertical electrical testing board fixing platform for fixing the testing board. When using such an electrical testing device to perform electrical performance tests on a vertical pin LCD, firstly, place the LCD screen on the product mounting platform, allowing the pins of the LCD to extend vertically downwards along the edge of the platform and align with the electrical test leads of the electrical testing board. Then, use external force to move the electrical testing board horizontally closer to the LCD pins, ensuring that the sides of each electrical test lead on the testing board are in contact with the sides of each LCD pin. Finally, control the conduction state of different electrical test leads on the testing board to energize the corresponding pins of the LCD that are in contact with them, thereby achieving various electrical performance tests on the LCD.

[0003] However, in certain special application scenarios (such as when the internal space of the entire device is small), the client's PCB cannot install a vertically pinned LCD. In this case, it is necessary to change the orientation of the vertically pinned LCD's pins so that the extension direction of the LCD's pins is parallel to the display surface of the LCD screen. This is where horizontally pinned LCDs come in. Since horizontally pinned LCDs are non-standard LCDs, their manufacturing process generally directly uses the processes and equipment of vertically pinned LCDs. Therefore, when using current electrical testing equipment based on vertically pinned LCD designs to perform electrical performance tests on horizontally pinned LCDs, the following problem arises: Because the pin extension direction of horizontally pinned LCDs is different from that of vertically pinned LCDs, when the LCD screen of a horizontally pinned LCD is placed on a product mounting platform, its pins do not extend vertically downwards but directly horizontally towards the electrical testing board. In this case, if external force is used to move the electrical testing board close to the LCD, improper control of the force can cause the LCD's pins to deform due to the impact. This can not only damage the LCD pins, affecting the performance of the LCD product, but also lead to poor contact or misalignment between the electrical test leads of the electrical test board and the LCD pins, thus affecting the accuracy of the LCD electrical performance test results. Furthermore, when the electrical test board is close to the horizontally pinned LCD, the side of the electrical test leads of the electrical test board can only contact the end face of the horizontally pinned LCD pin, and not the side of the pin. This reduces the contact area between the electrical test leads of the electrical test board and the LCD pin, decreasing the reliability of the contact. Additionally, inconsistent pin lengths of the horizontally pinned LCD (due to design or manufacturing processes) can also lead to poor contact between the electrical test leads of the electrical test board and the LCD pins, all of which will affect the accuracy of the LCD electrical performance test results. Utility Model Content

[0004] The present invention addresses the problem that electrical testing devices based on vertical pin LCDs affect the accuracy of electrical performance tests on horizontal pin LCDs, and provides a testing device for horizontal pin LCDs.

[0005] To solve the above problems, this utility model is achieved through the following technical solution:

[0006] A horizontal pin LCD testing device includes a fixed platform, a pressure plate, a pair of pneumatic connecting rods, a pneumatic actuator, and a pneumatic switch. One side of the upper surface of the fixed platform has an embedded groove for fixing an electrical testing plate, and the other side has a positioning groove for placing the LCD. The electrical testing plate is fixedly installed in the embedded groove. A lead wire area is provided at the edge of the electrical testing plate, and multiple electrical testing leads are printed in this area. The number of these leads is the same as the number of pins of the horizontal pin LCD under test, with each lead wire corresponding to one pin. All electrical testing leads are arranged parallel to each other at intervals, and the extension direction of each lead is on the same straight line as the extension direction of its corresponding pin. The lead wire area of ​​the electrical testing plate faces the positioning groove. The horizontal pin LCD under test is placed in the positioning groove; at this time, the pins of the horizontal pin LCD under test face the electrical testing plate, and the pins of the horizontal pin LCD under test are covered by the electrical testing plate. Above the lead area, each pin of the LCD under test is in contact with each electrical test lead of the electrical test board. The pressure plate is positioned directly above the fixed platform, with its lower surface parallel to the upper surface of the platform. The upper ends of a pair of pneumatic connecting rods are fixedly connected to the opposite edges of the pressure plate, while their lower ends are movably inserted through the opposite edges of the fixed platform. The pneumatic switch is connected to the control input of the pneumatic actuator, and the control output of the pneumatic actuator is connected to the pair of pneumatic connecting rods. During electrical performance testing, the pneumatic switch is turned on, and the pneumatic actuator drives the pressure plate vertically downward to the contact area between the lead area of ​​the electrical test board and the pin of the LCD under test. The downward pressure ensures that each pin of the LCD under test is tightly attached to each electrical test lead of the electrical test board. When the electrical performance test is completed, the pneumatic switch is turned off, and the pneumatic actuator drives the pressure plate vertically upward until it returns to its original position.

[0007] In the above scheme, the opening depth of the positioning groove is equal to the distance between the lower surface of the pin of the LCD to be tested and the lower surface of the LCD screen minus the height of the electrical test board protruding from the upper surface of the fixed platform after being embedded in the recess.

[0008] In the above scheme, a smooth insulating elastic film is fixed to the lower surface of the pressure plate.

[0009] In the above scheme, the pneumatic switch is a foot-operated pneumatic switch.

[0010] Compared with the prior art, this utility model, by designing a dedicated electrical performance testing device for horizontal pin LCDs, can solve the problems existing when current electrical testing devices based on vertical pin LCDs are directly used for electrical performance testing of horizontal pin LCDs. These problems include deformation of the LCD pins due to impact, and poor contact or misalignment between the electrical test leads of the electrical test board and the LCD pins caused by various reasons. This ensures the accuracy of the electrical performance test results for horizontal pin LCDs and has the advantages of simple operation and high efficiency. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of a horizontal pin LCD testing device.

[0012] The following are labeled in the diagram: 1. Fixed platform; 2. Electrical test board; 3. LCD of the horizontal pin to be tested; 4. Pressure plate; 5. Insulating elastic film; 6. Pneumatic connecting rod; 7. Pneumatic actuator; 8. Pneumatic switch. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific examples and the accompanying drawings. It should be noted that directional terms mentioned in the examples, such as "up," "down," "middle," "left," "right," "front," and "back," are only for reference to the directions in the accompanying drawings. Therefore, the directions used are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0014] See Figure 1 A horizontal pin LCD testing device includes a fixed platform 1, a pressure plate 4, a pair of pneumatic connecting rods 6, a pneumatic actuator 7, and a pneumatic switch 8.

[0015] One side of the upper surface of the fixed platform 1 has an embedded groove for fixing the electrical testing plate 2, and the other side has a positioning groove for placing the LCD. The electrical testing plate 2 and the LCD 3 under test are located on the fixed platform 1. The electrical testing plate 2 is fixedly installed in the embedded groove. A lead area is provided at the edge of the electrical testing plate 2, and multiple electrical testing leads are printed in this area. The number of these electrical testing leads is the same as the number of pins of the LCD 3 under test, with each electrical testing lead corresponding to one pin. All electrical testing leads are arranged parallel to each other at intervals, and the extension direction of each electrical testing lead is on the same straight line as the extension direction of its corresponding pin. The lead area of ​​the electrical testing plate 2 faces the positioning groove. The LCD 3 under test is placed in the positioning groove. The pins of the horizontal pin LCD3 under test face the side of the electrical test board 2, and the pins of the horizontal pin LCD3 under test cover the lead area of ​​the electrical test board 2. Each pin of the horizontal pin LCD3 under test is in contact with each electrical test lead of the electrical test board 2.

[0016] To improve the contact reliability between the pin of the LCD3 under test and the electrical test lead of the electrical test board 2, the depth of the positioning groove is equal to the distance between the lower surface of the pin of the LCD3 under test and the lower surface of the LCD screen minus the height of the electrical test board 2 protruding from the upper surface of the fixing platform 1 after being embedded in the groove. This ensures that when the LCD3 under test is placed in the positioning groove, the pin of the LCD3 under test can just make contact with the electrical test lead of the electrical test board 2. To further improve the contact reliability between the pin of the LCD3 under test and the electrical test lead of the electrical test board 2, a smooth insulating elastic film 5 is also added to the lower surface of the pressure plate 4. Because the insulating elastic film 5 has a certain degree of elasticity and deformation, it can adapt to the upwardly protruding or downwardly recessed pins of the LCD3 under test and the electrical test leads of the electrical test board 2. This ensures that the downward pressure of the pressure plate 4 can effectively act on the pins of the LCD3 under test and the electrical test leads of the electrical test board 2, and effectively avoids deformation of the LCD3 pins under test caused by the downward pressure of the pressure plate 4. Because the insulating elastic film 5 has insulating properties, it will not allow different pins of the LCD3 under test and different electrical test leads of the electrical test board 2 to conduct to each other, thus affecting the electrical performance test results.

[0017] The pressure plate 4 is positioned directly above the fixed platform 1, with its lower surface parallel to the upper surface of the fixed platform 1. The upper ends of a pair of pneumatic connecting rods 6 are fixedly connected to opposite edges of the pressure plate 4, while their lower ends movably pass through opposite edges of the fixed platform 1. A pneumatic switch 8 is connected to the control input of a pneumatic actuator 7, and the control output of the pneumatic actuator 7 is connected to the pair of pneumatic connecting rods 6. The pneumatic switch 8 can be a manual switch or a foot switch; for ease of operation, in a preferred embodiment of this invention, the pneumatic switch 8 is a foot-operated pneumatic switch. During electrical performance testing, the pneumatic switch 8 is activated, and the pneumatic actuator 7 drives the pressure plate 4 vertically downwards to the contact area between the lead area of ​​the electrical testing board 2 and the pin of the horizontal pin LCD 3 under test. The downward pressure ensures that each pin of the horizontal pin LCD 3 under test is tightly attached to each electrical test lead of the electrical testing board 2. When the electrical performance test is completed, the pneumatic switch 8 is closed, and the pneumatic actuator 7 drives the pressure plate 4 to move vertically upward until it is reset.

[0018] It should be noted that although the embodiments described above are illustrative, they are not intended to limit the present invention. Therefore, the present invention is not limited to the specific embodiments described above. Any other embodiments obtained by those skilled in the art under the guidance of the present invention without departing from its principles are considered to be within the protection scope of the present invention.

Claims

1. A horizontal pin LCD testing device, characterized in that, It includes a fixed platform (1), a pressure plate (4), a pair of pneumatic connecting rods (6), a pneumatic actuator (7) and a pneumatic switch (8); The upper surface of the fixed platform (1) has an embedded groove for fixing the electrical test plate (2) on one side and a positioning groove for placing the LCD on the other side; the electrical test plate (2) is fixedly installed in the embedded groove; the edge of the electrical test plate (2) has a lead wire area, and multiple electrical test leads are printed in the lead wire area. The number of these electrical test leads is the same as the number of pins of the LCD (3) to be tested, and each electrical test lead corresponds to one pin; all electrical test leads are arranged in parallel and spaced apart from each other, and the extension of each electrical test lead is... The extension direction is on the same straight line as the extension direction of the corresponding pin; the lead area of ​​the electrical test board (2) faces the positioning groove; the horizontal pin LCD (3) to be tested is placed in the positioning groove; at this time, the pin of the horizontal pin LCD (3) to be tested faces the electrical test board (2), and the pin of the horizontal pin LCD (3) to be tested covers the lead area of ​​the electrical test board (2), and each pin of the horizontal pin LCD (3) to be tested is in contact with each electrical test lead of the electrical test board (2); The pressure plate (4) is set directly above the fixed platform (1), and the lower surface of the pressure plate (4) is parallel to the upper surface of the fixed platform (1); the upper ends of a pair of pneumatic connecting rods (6) are fixedly connected to the opposite edges of the pressure plate (4), and the lower ends are movably inserted through the opposite edges of the fixed platform (1); the pneumatic switch (8) is connected to the control input end of the pneumatic actuator (7), and the control output end of the pneumatic actuator (7) is connected to a pair of pneumatic connecting rods (6).

2. The horizontal pin LCD testing device according to claim 1, characterized in that, The depth of the positioning groove is equal to the distance between the lower surface of the pin of the horizontal pin LCD (3) to be tested and the lower surface of the liquid crystal screen minus the height of the electrical test plate (2) protruding from the upper surface of the fixed platform (1) after being embedded in the recess.

3. The horizontal pin LCD testing device according to claim 1, characterized in that, A smooth insulating elastic film (5) is fixed to the lower surface of the pressure plate (4).

4. The horizontal pin LCD testing device according to claim 1, characterized in that, The pneumatic switch (8) is a foot-operated pneumatic switch (8).

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