Horizontal pin LCD testing device

Abstract

The invention discloses a horizontal pin LCD testing device which is composed of a fixed platform, a pressing plate, a pair of pneumatic connecting rods, a pneumatic actuator and a pneumatic switch. The electrical testing plate and the to-be-tested horizontal pin LCD are located on the same fixed platform, the pressing plate is driven by the pneumatic actuator to vertically move downwards, and all pins of the to-be-tested horizontal pin LCD are tightly attached to all electrical testing leads of the electrical testing plate in a one-to-one correspondence mode through downward pressing force. According to the invention, the problems that the pins of the horizontal pin LCD deform due to impact when the current electrical testing device designed based on the vertical pin LCD is directly used for testing the electrical performance of the horizontal pin LCD, and the electrical testing lead of the electrical testing plate and the pins of the LCD are in poor contact or misplaced due to various reasons can be solved; the horizontal pin LCD electrical performance testing device has the advantages of being easy to operate, high in efficiency and the like.

Description

Technical Field

[0001] The invention relates to the technical field of liquid crystal display, and in particular to a horizontal pin LCD testing device. Background Art

[0002] LCD (liquid crystal display) consists of a liquid crystal screen and pins. The pins are made of metal copper with strong toughness and stability. The front end is connected to the step of the liquid crystal screen during preparation, and the end is connected to the client's PCB when in use. It mainly plays the role of connection, fixation and conduction. In the production process of LCD, in order to ensure the quality of LCD, it is necessary to use an electrical testing device to test the electrical performance of LCD. The current electrical testing devices are all designed based on vertical pin LCDs. Since the extension direction of the pins of the vertical pin LCD is perpendicular to the display surface of the liquid crystal screen, the current electrical testing devices include 2 relatively independent and perpendicular platforms, namely, a horizontal product fixing platform for fixing the LCD to be tested, and a vertical electrical testing board fixing platform for fixing the electrical testing board. When using such an electrical testing device to test the electrical performance of a vertical pin LCD, firstly, the liquid crystal screen of the vertical pin LCD is placed on a product fixing platform, and the pins of the vertical pin LCD are naturally extended vertically downward along the edge of the product fixing platform and are opposite to the electrical testing leads of the electrical testing board; then, the electrical testing board is horizontally moved close to the pins of the LCD by external force, so that the side surfaces of each electrical testing lead of the electrical testing board correspond to and stick to the side surfaces of each pin of the LCD one by one; finally, the conduction states of different electrical testing leads of the electrical testing board are controlled, so that the corresponding pins of the LCD in contact with them are energized, thereby realizing various electrical performance tests of the LCD.

[0003] However, in some special usage scenarios (such as when the internal space of the whole machine is small), the client's PCB cannot install a vertical pin LCD. At this time, it is necessary to change the direction of the pins of the vertical pin LCD so that the extension direction of the LCD pins is parallel to the display surface of the LCD screen, and the horizontal pin LCD comes into being. Since the horizontal pin LCD is a non-standard LCD, it generally directly uses the process and equipment of the vertical pin LCD during the production and preparation process. Therefore, when using the current electrical testing device designed based on the vertical pin LCD to test the electrical performance of the horizontal pin LCD, there will be the following problems: Because the extension direction of the pins of the horizontal pin LCD is different from that of the vertical pin LCD, when the LCD screen of the horizontal pin LCD is placed on the product fixed platform, its pins do not extend vertically downward, but extend horizontally directly toward the electrical testing board. At this time, when the external force moves the electrical testing board to approach the LCD, once the force of the external force is improperly controlled, the pins of the LCD will be deformed due to the impact. This may not only damage the pins of the LCD, thereby affecting the performance of the LCD product, but also cause the electrical test leads of the electrical test board to have poor contact or misalignment with the pins of the LCD, thereby affecting the accuracy of the LCD electrical performance test results. In addition, when the electrical test board is close to the horizontal pin LCD, the side of the electrical test lead of the electrical test board can only contact the end surface of the pin of the horizontal pin LCD, but cannot contact the side of the pin of the horizontal pin LCD. This will reduce the contact area between the electrical test lead of the electrical test board and the pin of the LCD, reduce the contact reliability between the two, and cause the electrical test lead of the electrical test board to have poor contact with the pin of the LCD due to the inconsistent length of the horizontal pin LCD pin (caused by design or process), which will affect the accuracy of the LCD electrical performance test results. Summary of the invention

[0004] The present invention aims to solve the problem that the accuracy of the result will be affected when an electrical performance test device designed based on a vertical pin LCD is performed on a horizontal pin LCD, and provides a horizontal pin LCD test device.

[0005] To solve the above problems, the present invention is achieved through the following technical solutions:

[0006] A horizontal pin LCD test device comprises a fixed platform, a pressing plate, a pair of pneumatic connecting rods, a pneumatic actuator and a pneumatic switch; an embedded groove for fixing an electric test board is provided on one side of the upper surface of the fixed platform, and a positioning groove for placing an LCD is provided on the other side; the electric test board is fixedly installed in the embedded groove; a lead area is provided at the edge of the electric test board, and a plurality of electric test leads are printed in the lead area, the number of the electric test leads is the same as the number of pins of the horizontal pin LCD to be tested, and each electric test lead corresponds to one pin; all the electric test leads are arranged in parallel and spaced relation, and the extension direction of each electric test lead is on the same straight line as the extension direction of the corresponding pin; the lead area of ​​the electric test board faces one side of the positioning groove; the horizontal pin LCD to be tested is placed in the positioning groove; at this time, the pin of the horizontal pin LCD to be tested faces one side of the electric test board, and the pin of the horizontal pin LCD to be tested covers the pin of the electric test board. Above the lead area, each pin of the horizontal pin LCD to be tested contacts with each electrical test lead of the electrical test board one by one; the pressing plate is arranged directly above the fixed platform, and the lower surface of the pressing plate is parallel to the upper surface of the fixed platform; the upper ends of a pair of pneumatic connecting rods are respectively fixedly connected to the opposite edges of the pressing plate, and the lower ends are respectively movably arranged at the opposite edges of the fixed platform; the pneumatic switch is connected to the control input end of the pneumatic actuator, and the control output end of the pneumatic actuator is connected to the pair of pneumatic connecting rods; when conducting an electrical performance test, the pneumatic switch is turned on, and the pneumatic actuator drives the pressing plate to move vertically downward to the contact area between the lead area of ​​the electrical test board and the pin of the horizontal pin LCD to be tested, and through the downward pressure, each pin of the horizontal pin LCD to be tested is closely attached to each electrical test lead of the electrical test board one by one; when completing the electrical performance test, the pneumatic switch is turned off, and the pneumatic actuator drives the pressing plate to move vertically upward until it is reset.

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

[0008] In the above solution, an insulating elastic film with a smooth surface is fixed on the lower surface of the pressing plate.

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

[0010] Compared with the prior art, the present invention designs an electrical performance testing device specifically for horizontal pin LCDs, which can solve the problems that the pins of the horizontal pin LCDs are deformed due to impact, and the electrical testing leads of the electrical testing board and the pins of the LCD are in poor contact or misaligned due to various reasons when the current electrical testing device designed based on the vertical pin LCD is directly used for the electrical performance testing of the horizontal pin LCD, so as to ensure the accuracy of the electrical performance testing results of the horizontal pin LCD, and has the advantages of simple operation and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of a horizontal pin LCD test device.

[0012] Numbers in the figure: 1. Fixed platform; 2. Electric test board; 3. LCD with horizontal pins to be tested; 4. Press plate; 5. Insulating elastic film; 6. Pneumatic connecting rod; 7. Pneumatic actuator; 8. Pneumatic switch. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in combination with specific examples and with reference to the accompanying drawings. It should be noted that the directional terms mentioned in the examples, such as "upper", "lower", "middle", "left", "right", "front", "back", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directions used are only used for illustration and are not used to limit the scope of protection of the present invention.

[0014] See also Figure 1 A horizontal pin LCD3 testing device includes a fixed platform 1, a pressing plate 4, a pair of pneumatic connecting rods 6, a pneumatic actuator 7 and a pneumatic switch 8.

[0015] An embedded groove for fixing the electric test board 2 is provided on one side of the upper surface of the fixed platform 1, and a positioning groove for placing LCD3 is provided on the other side. The electric test board 2 and the horizontal pin LCD3 to be tested are located on the fixed platform 1. The electric test board 2 is fixedly installed in the embedded groove. A lead area is provided at the edge of the electric test board 2, and a plurality of electric test leads are printed in the lead area. The number of these electric test leads is the same as the number of pins of the horizontal pin LCD3 to be tested, and each electric test lead corresponds to one pin. All the electric test leads are arranged parallel to each other and spaced apart, and the extension direction of each electric test lead is on the same straight line as the extension direction of the corresponding pin. The lead area of ​​the electric test board 2 faces one side of the positioning groove. The horizontal pin LCD3 to be tested is placed in the positioning groove. The pins of the horizontal pins LCD3 to be tested face one side of the electrical testing board 2 and cover the lead area of ​​the electrical testing board 2 . Each pin of the horizontal pins LCD3 to be tested contacts each electrical testing lead of the electrical testing board 2 one by one.

[0016] In order to improve the contact reliability between the pin of the horizontal pin LCD3 to be tested and the electric test lead of the electric test board 2, the depth of the positioning groove is equal to the distance between the lower surface of the pin of the horizontal pin LCD3 to be tested and the lower surface of the liquid crystal screen minus the height of the electric test board 2 protruding from the upper surface of the fixed platform 1 after being embedded in the embedded groove, so that when the horizontal pin LCD3 to be tested is placed in the positioning groove, the pin of the horizontal pin LCD3 to be tested can just contact the electric test lead of the electric test board 2. In order to further improve the contact reliability between the pin of the horizontal pin LCD3 to be tested and the electric test lead of the electric test board 2, a smooth insulating elastic film 5 is also provided on the lower surface of the pressing plate 4. Since the insulating elastic film 5 has a certain elasticity and a certain deformation amount, it can adapt to the pins of the horizontal pins LCD3 to be tested and the electrical test leads of the electrical test board 2 that are protruding upward or recessed downward, ensuring that the downward pressure of the pressing plate 4 can effectively act on the pins of the horizontal pins LCD3 to be tested and the electrical test leads of the electrical test board 2, and can effectively avoid the pins of the horizontal pins LCD3 to be tested from being deformed due to the downward pressure of the pressing plate 4. Since the insulating elastic film 5 has insulating properties, it will not allow different pins of the horizontal pins LCD3 to be tested and different electrical test leads of the electrical test board 2 to be connected to each other, thereby affecting the electrical performance test results.

[0017] The pressing plate 4 is arranged directly above the fixed platform 1, and the lower surface of the pressing 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 respectively fixedly connected to the opposite edges of the pressing plate 4, and the lower ends are respectively movably arranged at 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 the pair of pneumatic connecting rods 6. The pneumatic switch 8 can be a manual switch 8 or a foot switch 8. For the convenience of operation, in the preferred embodiment of the present invention, the pneumatic switch 8 is a foot pneumatic switch 8. When conducting an electrical performance test, the pneumatic switch 8 is turned on, and the pneumatic actuator 7 drives the pressing plate 4 to move vertically downward to the contact area between the lead area of ​​the electrical test board 2 and the pin of the horizontal pin LCD3 to be tested, and through the downward pressure, each pin of the horizontal pin LCD3 to be tested corresponds closely to each electrical test lead of the electrical test board 2. When the electrical performance test is completed, the pneumatic switch 8 is closed, and the pneumatic actuator 7 drives the pressing plate 4 to move vertically upward until it is reset.

[0018] It should be noted that although the embodiments of the present invention described above are illustrative, they are not intended to limit the present invention, and therefore the present invention is not limited to the above specific embodiments. Without departing from the principles of the present invention, any other embodiments obtained by those skilled in the art under the guidance of the present invention are deemed to be within the protection of the present invention.

Claims

1. A horizontal pin LCD test device, characterized in that: It comprises a fixed platform (1), a pressing plate (4), a pair of pneumatic connecting rods (6), a pneumatic actuator (7) and a pneumatic switch (8); An embedded groove for fixing the electric test board (2) is provided on one side of the upper surface of the fixed platform (1), and a positioning groove for placing the LCD (3) is provided on the other side; the electric test board (2) is fixedly installed in the embedded groove; a lead area is provided at the edge of the electric test board (2), and a plurality of electric test leads are printed in the lead area, the number of the electric test leads is the same as the number of the pins of the horizontal pin LCD (3) to be tested, and each electric test lead corresponds to one pin; all the electric test leads are arranged in parallel with each other and spaced apart, and each electric test lead is arranged in parallel with each other and spaced apart from each other. The extension direction of the horizontal pins (3) and the extension direction of the corresponding pins are all on the same straight line; the lead area of ​​the electric test board (2) faces one side of the positioning groove; the horizontal pins LCD (3) to be tested are placed in the positioning groove; at this time, the pins of the horizontal pins LCD (3) to be tested face one side of the electric test board (2), and the pins of the horizontal pins LCD (3) to be tested cover the top of the lead area of ​​the electric test board (2), and each pin of the horizontal pins LCD (3) to be tested is in contact with each electric test lead of the electric test board (2) in a one-to-one correspondence; The pressure plate (4) is arranged 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 respectively fixedly connected to the opposite edges of the pressure plate (4), and the lower ends are respectively movably arranged at 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 the pair of pneumatic connecting rods (6); when performing electrical performance During the test, the pneumatic switch (8) is turned on, and the pneumatic actuator (7) drives the pressing plate (4) to move vertically downward to the contact area between the lead area of ​​the electric test board (2) and the pin of the horizontal pin LCD (3) to be tested, and through the downward pressure, each pin of the horizontal pin LCD (3) to be tested is closely attached to each electric test lead of the electric test board (2) in a one-to-one correspondence; when the electrical performance test is completed, the pneumatic switch (8) is turned off, and the pneumatic actuator (7) drives the pressing plate (4) to move vertically upward until it is reset.

2. A horizontal pin LCD test 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 board (2) protruding from the upper surface of the fixed platform (1) after being embedded in the embedded groove.

3. The horizontal pin LCD test device according to claim 1, characterized in that: An insulating elastic film (5) with a smooth surface is fixed on the lower surface of the pressing plate (4).

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

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