Liquid crystal display testing device

Abstract

The utility model relates to the field of liquid crystal screen testing, and particularly discloses a liquid crystal screen testing device, which comprises a bottom plate, two groups of PCBs (printed circuit boards) are arranged on the bottom plate, circuits are arranged on the PCBs, one end of each PCB is provided with an electrical interface, a flat cable is inserted into the electrical interface, a plurality of PINs are arranged on the PCBs, elastic crimping parts are arranged on the bottom plate, and the elastic crimping parts correspond to the PINs. An insulating crimping head is arranged at the front end of the elastic crimping part; according to the utility model, the PINs are arranged on the PCB, the golden fingers on the FPC connected with the liquid crystal screen correspond to the PINs during testing, the FPC is crimped and fixed on the PINs by using the insulating crimping heads at the front ends of the elastic crimping parts, and the electric interfaces are connected through the flat cables to connect a circuit, electrify the PINs, connect the liquid crystal screen and finish a lightening test, so that a plurality of liquid crystal screens can be tested at the same time; according to the testing jig, the testing efficiency of the liquid crystal screen is improved, the PIN distance between the PINs can be freely set so as to adapt to golden fingers of FPCs on different liquid crystal screens, manufacturing is easy, and the cost of the testing jig is reduced.

Description

Technical Field

[0001] The utility model relates to the field of liquid crystal display screen testing, in particular to a liquid crystal display screen testing device. Background Art

[0002] At present, with the increasing demand for liquid crystal display screens in the market, customers pay more attention to product quality. There are various specifications and models of liquid crystal display screens emerging in an endless stream in the market. Factory testing has become an essential link. After the liquid crystal display screen is docked with the FPC, a lighting test needs to be carried out to ensure that the connection circuit between the liquid crystal display screen and the FPC is conducting, and it can also test whether the display screen is normal. At present, the lighting test of liquid crystal display screens is mostly manual testing. Only one liquid crystal display screen can be tested each time, and the test efficiency is low. Moreover, due to the complexity of the module, some unconventional PIN definitions lead to an increase in the cost of customizing the test fixture for liquid crystal display screens, and the manufacturing difficulty is relatively large. Therefore, this application proposes a liquid crystal display screen testing device to solve the above problems. Summary of the Utility Model

[0003] Aiming at the existing problems, the utility model provides a liquid crystal display screen testing device, which can effectively solve the problems put forward in the background art.

[0004] To solve the above problems, the utility model adopts the following technical solutions:

[0005] A liquid crystal display screen testing device includes a bottom plate. Two groups of PCB boards are arranged on the bottom plate. Circuits are arranged on the PCB boards. One end of the PCB board is provided with an electrical interface, and a wiring harness is plugged into the electrical interface. A plurality of PIN pins are arranged on the PCB board. An elastic pressing member is arranged on the bottom plate. The elastic pressing member is arranged corresponding to the PIN pins, and an insulating pressing head is arranged at the front end of the elastic pressing member.

[0006] As a further scheme of the utility model: Two positioning strip grooves are arranged on the bottom plate. The PCB board is placed into the positioning strip grooves, and the PCB board is fixedly connected with the positioning strip grooves by screws. A placement groove is arranged between the two positioning strip grooves. The placement groove corresponds to the PIN pins one by one, and the placement groove is used for placing the liquid crystal display screen.

[0007] As a further scheme of the utility model: Positioning columns are arranged on both sides of the PIN pins on the PCB board.

[0008] As a further scheme of the utility model: The elastic pressing member includes a shaft seat. A crank is rotatably connected to the shaft seat. A pressing handle is arranged at one end of the crank. The other end of the crank is connected with the insulating pressing head. The crank is connected with the shaft seat through an elastic member. The elastic member drives the crank to rotate, so that the insulating pressing head on the crank presses on the PIN pins.

[0009] As a further solution of the utility model: the elastic member is a spring.

[0010] As a further solution of the utility model: vertical blocks for fixing to the PCB board are provided on both sides of the insulating crimping head, arc-shaped grooves are provided on the vertical blocks, limiting members are fixedly connected to both sides of the insulating crimping head, and the limiting members extend into the arc-shaped grooves and slide along the arc-shaped grooves.

[0011] As a further solution of the utility model: mounting holes are provided at the four corners of the bottom plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: by arranging PIN pins on the PCB board, during testing, the gold fingers on the FPC connected to the liquid crystal screen correspond to the PIN pins, and the insulating crimping head at the front end of the elastic crimping member is used to crimp and fix the FPC on the PIN pins, and the circuit is connected through the wiring harness to connect to the electrical interface to energize the PIN pins and turn on the liquid crystal screen to complete the lighting test. Multiple liquid crystal screens can be tested simultaneously, improving the test efficiency of the liquid crystal screen, and the PIN pitch of the PIN pins can be freely set to adapt to the gold fingers of the FPC on different liquid crystal screens. The production is simple, reducing the cost of the test fixture. Description of the Drawings

[0013] Figure 1 is a three-dimensional schematic diagram of the overall structure of a liquid crystal screen testing device;

[0014] Figure 2 is a top view of the overall structure of a liquid crystal screen testing device;

[0015] Figure 3 is a schematic diagram of the structure of the PCB board and the elastic crimping member in a liquid crystal screen testing device;

[0016] Figure 4 is Figure 3 the enlarged schematic diagram at A in

[0017] Figure 5 is Figure 3 the plan view of

[0018] In the figure: 1, bottom plate; 2, mounting hole; 3, PCB board; 4, electrical interface; 5, wiring harness; 6, PIN pin; 7, elastic crimping member; 71, shaft seat; 72, crank; 73, pressing handle; 74, elastic member; 8, insulating crimping head; 9, positioning strip groove; 10, positioning post; 11, vertical block; 12, arc-shaped groove; 13, limiting member. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present invention.

[0020] Combined with Figures 1 to 5 Describing this embodiment, this embodiment provides a liquid crystal screen testing device, which includes a bottom plate 1. Mounting holes 2 are provided at the four corners of the bottom plate 1 for fixing the bottom plate 1. Two groups of PCB boards 3 are provided on the bottom plate 1. Circuits are provided on the PCB boards 3, and the circuits are formed by etching or copper plating. One end of the PCB board 3 is provided with an electrical interface 4, and a wiring harness 5 is inserted into the electrical interface 4. A plurality of PIN feet 6 are provided on the PCB board 3, and the PIN feet 6 are arranged on the circuit. The electrical interface 4 is connected to the power supply through the wiring harness 5. An elastic pressing member 7 is provided on the bottom plate 1. The elastic pressing member 7 is arranged in one-to-one correspondence with the PIN feet 6. An insulating pressing head 8 is provided at the front end of the elastic pressing member 7. The insulating pressing head 8 presses the gold fingers of the FPC on the liquid crystal screen onto the PIN feet 6 to connect the power supply of the liquid crystal screen.

[0021] Two positioning strip grooves 9 are provided on the bottom plate 1. The PCB board 3 is placed into the positioning strip grooves 9, and the PCB board 3 is fixedly connected to the positioning strip grooves 9 by screws. A placement groove is provided between the two positioning strip grooves 9. The placement groove is arranged in one-to-one correspondence with the PIN feet 6, and the placement groove is used for placing the liquid crystal screen. Positioning posts 10 are provided on both sides of the PCB board 3 where the PIN feet 6 are located. Two positioning holes are provided at the gold finger end of the FPC on the touch screen. The positioning posts 10 are inserted into the positioning holes to achieve the positioning of the gold finger end, so that the gold fingers are in corresponding contact with the PIN feet 6.

[0022] The elastic pressing member 7 includes a shaft seat 71. A crank 72 is rotatably connected to the shaft seat 71. A pressing handle 73 is provided at one end of the crank 72. The other end of the crank 72 is connected to the insulating pressing head 8. The crank 72 is connected to the shaft seat 71 through an elastic member 74. The elastic member 74 drives the crank 72 to rotate, so that the insulating pressing head 8 on the crank 72 presses on the PIN feet 6. The elastic member 74 is a spring. The spring can be a linear spring, directly connecting the crank 72 and the shaft seat 71, or a curved spring or a spiral spring can be used, which is arranged at the shaft connection part of the crank 72 and the shaft seat 71.

[0023] Vertical blocks 11 fixed to the PCB board 3 are provided on both sides of the insulating pressing head 8. Arc-shaped grooves 12 are provided on the vertical blocks 11. Limiting members 13 are fixedly connected to both sides of the insulating pressing head 8. The limiting members 13 extend into the arc-shaped grooves 12 and slide along the arc-shaped grooves 12. The limiting members 13 slide in the arc-shaped grooves 12 to achieve the limiting of the insulating pressing head 8.

[0024] The working principle of the present utility model is as follows: PIN pins 6 are provided on the PCB board 3. During testing, the gold fingers on the FPC connected to the liquid crystal display are corresponding to the PIN pins 6. The insulating crimping head 8 at the front end of the elastic crimping member 7 is used to crimp and fix the FPC on the PIN pins 6, and the circuit is connected through the flexible cable 5 to the electrical interface 4 to energize the PIN pins 6 and turn on the liquid crystal display, completing the lighting test. Multiple liquid crystal displays can be tested simultaneously, improving the test efficiency of the liquid crystal displays. Moreover, the PIN pitch of the PIN pins 6 can be freely set to adapt to the gold fingers of the FPCs on different liquid crystal displays. The production is simple, reducing the cost of the test fixture.

[0025] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid crystal screen testing device, comprising a bottom plate, characterized in that: Two groups of PCB boards are arranged on the bottom plate, circuits are arranged on the PCB boards, an electrical interface is arranged at one end of the PCB board, a flat cable is plugged into the electrical interface, a plurality of PIN pins are arranged on the PCB board, an elastic crimping piece is arranged on the bottom plate, the elastic crimping piece is arranged corresponding to the PIN pin, and an insulating crimping head is arranged at the front end of the elastic crimping piece.

2. A liquid crystal screen testing device according to claim 1, characterized in that: The bottom plate is provided with two positioning grooves, the PCB board is placed in the positioning grooves, and the PCB board is fixedly connected to the positioning grooves by screws, a placement groove is provided between the two positioning grooves, the placement groove corresponds to the PIN pins one by one, and the placement groove is used to place the LCD screen.

3. The liquid crystal screen testing device according to claim 1, characterized in that: The PCB board is provided with positioning posts on both sides of the PIN pins.

4. The liquid crystal screen testing device according to claim 1, characterized in that: The elastic crimping part includes an axle seat, a crank is rotatably connected to the axle seat, a pressing handle is provided at one end of the crank, and the other end of the crank is connected to an insulating crimping joint. The crank is connected to the axle seat through an elastic part, and the elastic part drives the crank to rotate so that the insulating crimping joint on the crank is pressed onto the PIN foot.

5. A liquid crystal screen testing device according to claim 4, characterized in that: The elastic member is a spring.

6. A liquid crystal screen testing device according to claim 4, characterized in that: Both sides of the insulating crimping joint are provided with upright blocks fixed to the PCB board, and the upright blocks are provided with arc-shaped grooves. Both sides of the insulating crimping joint are fixedly connected with limiting members, and the limiting members extend into the arc-shaped grooves and slide along the arc-shaped grooves.

7. The liquid crystal screen testing device according to claim 1, characterized in that: The four corners of the bottom plate are provided with mounting holes.

Images