Liquid crystal point reversing drive circuit

Abstract

The invention provides a liquid crystal point reversing drive circuit, comprising a positive signal source, a negative signal source, a first selection unit and a second selection unit, wherein, the positive signal source provides a first positive signal and a second positive signal; the negative signal source provides a first negative signal source and a second negative signal source; the first selection unit is connected with the positive signal source and the negative signal source and used for receiving the first positive signal of the positive signal source and the first negative signal of the negative signal source, and the unit is composed of low-voltage elements; the second selection unit is connected with the positive signal source and the negative signal source and used for receiving the second positive signal of the positive signal source and the second negative signal of the negative signal source, and the unit is composed of low-voltage elements; the first signal source is connected with the first selection unit to alternately output a first positive voltage and a first negative voltage; and the second signal source is connected with the second selection unit to alternately output a second positive voltage and a second negative voltage. The drive circuit forms output of the positive voltage and the negative voltage of two source electrodes by single positive signal source and single negative signal source, thus reducing the usage quantity of a computing amplifier.

Description

technical field [0001] The invention relates to a liquid crystal dot inversion driving circuit, in particular to a simplified liquid crystal dot inversion driving circuit. Background technique [0002] Generally speaking, multiple pixels of an existing flat panel display are controlled by corresponding multiple thin film transistors (TFTs) (not shown), so as to control a liquid crystal display (LCD display) 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 operations of these thin film transistors. [0003] like figure 1 As shown, the two frames in the figure represent the polarity of the liquid crystal capacitor gate (gate) and signal source (source) when the liquid crystal capacitor is charged at the voltage polarity change point reversed. The two frames are respectively the first frame N and the second frame N+1. For example, the first frame N and the second...

AI Technical Summary

Problems solved by technology

In fact, the first high-voltage selection circuit 10' and the second high-voltage selection circuit 11' are composed of high-voltage process components, so they have the disadvantages of large volume and high energy consumption

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