Liquid crystal device

Abstract

The invention provides a liquid crystal device. A fan-out zone (51) of a display panel (5) of the liquid crystal display device is provided with a plurality of diodes (D) for ESD (electro-static discharge) protection of an S-COF chip (3), a positive pole of every diode (D) is grounded and a negative pole is electrically connected with an input signal of a PCB (printed circuit board) (2) and an input terminal of the S-COF chip (3) through a thin-film wire (L), the input signal of the PCB (2) is transmitted to the input terminal of the S-COF chip (3) through the thin-film wire (L), and through this diode, static electricity on the S-COF chip (3) is released for ESD protection of the S-COF chip (3). Compared with the prior art, the invention reduces transient voltage suppressors on the PCB, saving PCB wiring area and component cost, and the added diodes may be manufactured by using an array process of an existing display panel, giving low reduction cost.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a liquid crystal display device. Background technique [0002] Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or notebook computer Screens, etc., dominate the field of flat panel displays. [0003] A thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD) is one of the main types of flat panel displays. The thin film transistor liquid crystal display controls the input of data signals through a thin film transistor switch, and then controls the screen display. [0004] see figure 1 , figure 1 It is a schematic diagram of the TFT-LCD driving architecture in the prior art. The main driving principles of the existing TFT-LCD include: the main board of the system p...

AI Technical Summary

Problems solved by technology

[0005] Electro-Static Discharge (ESD) refers to the charge transfer caused by objects with different electrostatic potentials approaching each other or in direct contact. The connector 100 in the TFT-LCD will inevitably generate static electricity when plugging and unplugging, causing electrostatic discharge. Generate thousands of volts of instantaneous voltage, causing electrostatic damage, making TFT-LCD unable to work normally

[0006] In order to avoid electrostatic damage, ESD testing is required in the production process of TFT-LCD. With the continuous improvement of user requirements for product reliability and stricter requirements for product quality, the standard of ESD testing has become more and more The stricter, in addition to the ESD test of the overall system in the traditional test, more and more customers require ESD testing for the input terminals of the S-COF chip. When it is found that the S-COF chip has weak ESD protection When the input terminal passes the ESD test, it is necessary to add additional ESD protection to the input terminal and its input signal, such as figure 2 As shown, the method used in the prior art for ESD protection of the S-COF chip 300 is to add a transient suppression diode TVS on the PCB 200, and then connect the input terminal and its input signal that cannot pass the ESD test to the transient state at the same time. Suppressing the diode TVS, enhancing its ESD protection capability through the transient suppressing diode TVS, this method needs to add a transient suppressing diode TVS on the PCB board 200, which increases the component cost and occupies the wiring (Layout) area of ​​the PCB board 200

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