Display panel drive circuit

Abstract

The present invention proposes a driving circuit for a display panel, which outputs a positive polarity signal to a first output terminal through a first switch and a second switch of a first positive selection circuit, or a second positive selection circuit. The third switch and a fourth switch output positive polarity signals to a second output terminal, while a fifth switch and a sixth switch of a first negative selection circuit output a negative polarity signal to the first output terminal, or a first output terminal A seventh switch and an eighth switch of the two negative selection circuits output negative polarity signals to the second output terminal; wherein, when the first switch and the second switch, the third switch and the fourth switch, the fifth switch and the sixth switch Or when the seventh switch and the eighth switch are turned off, both are equivalent to a diode, so as to achieve the purpose of saving circuit area and reducing cost.

Description

technical field [0001] The present invention relates to a driving circuit, in particular to a driving circuit of a display panel. Background technique [0002] Generally speaking, several pixels of a conventional flat panel display are controlled by corresponding several thin film transistors [TFT] [not shown], so as to control a liquid crystal display [LCD display] [not shown] to display desired images. Several gate driving lines of the flat panel display are connected to gates of corresponding thin film transistors to control switching actions of the thin film transistors. [0003] Please refer to Figure 1, which reveals the polarity schematic diagram of the liquid crystal capacitor gate [gate] and signal source [source] when the two frames [frame] are reversed at the voltage polarity change point where the liquid crystal capacitor is charged. . The two frames are one figure 1 frame frame N and one figure 2 Frame frame N+1. For example, the figure 1 frame frame N an...

AI Technical Summary

Problems solved by technology

[0012] However, the above Figure 3 to Figure 5 The point inversion drive circuit of the known technology must use the switches SW9, SW10, SW11, SW12 to conduct when the switch SW1 and the switch SW5, the switch SW2 and the switch SW6, the switch SW3 and the switch SW7 or the switch SW4 and the switch SW8 are cut off. In order to avoid switch SW1 and switch SW5, switch SW2 and switch SW6, switch SW3 and switch SW7 or switch SW4 and switch SW8 must withstand high withstand voltage, and use high withstand voltage components, thereby increasing the cost

Because the dot inversion driving circuit of the prior art must use switches SW9, SW10, SW11, SW12 to avoid the need to use high withstand voltage components, thereby achieving the purpose of reducing costs, but the dot inversion driving circuit of the prior art must still use switches SW9, SW10, SW11, SW12, while increasing the cost

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