PCB test board routing of pins of liquid crystal display screen

Abstract

The invention discloses a PCB test board routing of pins of a liquid crystal display screen. The PCB test board routing comprises a PCB film routing, the PCB film routing is connected with a LCD electrical testing machine through a FPC, the PCB film routing comprises a SEG routing and a COM routing, the SEG routing comprises a first SEG wire, a second SEG wire, a third SEG wire and a fourth SEG wire, the first SEG wire, the second SEG wire, the third SEG wire and the fourth SEG wire are respectively led out and connected with a first SEG detection port, a second SEG detection port, a third SEG detection port and a fourth SEG detection port, the COM routing comprises a first COM wire and a second COM wire, and the first COM wire and the second COM wire are respectively led out and connected with a first COM detection port and a second COM detection port. The beneficial effects of the PCB test board routing are that based on the conventional test PCB routing, two sides are respectively and additionally provided with a wire with the same gap and width, the two wires form a plurality of groups of wires whose PITCH is less than the width of the pins, the electrical testing machine determines short circuit of the product and gives an alarm, and the goal of detecting excess number of the pins is achieved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display screen testing, in particular to a PCB test board wiring of pins of a liquid crystal display screen. Background technique [0002] In the field of liquid crystal display, it is a common design to connect the drive signal to the liquid crystal display through pins. During the assembly process of the LCD screen pins, due to the instability of the machine, the lack of manual work, and the mixture caused by management omissions, many or few pins are assembled. Due to the large number of general pin assembly, it is difficult to distinguish with the naked eye. Conventional detection methods are easy to miss, and the defective product will cause incomplete display (few pins) and difficult assembly (many pins). [0003] For such products, many or few pins sometimes appear, which has a great impact on product quality. Various LCD screen manufacturers have invested a lot of manpower and wor...

AI Technical Summary

Problems solved by technology

[0005] like figure 1 and 2 As shown, in the existing method of testing PCB, when there are a large number of pins, since the wiring electrodes of the LCD screen have all been connected to the COM and SEG detection ports of the electrical tester, there will be no abnormal display in function, and redundant If the pins are not connected to the detection port of the electric tester, the electric test display function is normal, there will be no alarm, and there is no fool-proof design, resulting in bad outflow; in the case of a small number of pins, the LCD display will be incomplete and it is easy to be detected by the tester. detected

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