Source electrode driving circuit preventing gamma coupling

Abstract

A level shifting device of the source electrode driving circuit outputs a plurality of logical high signals to a P type metal oxide semiconductor field effect transistor digital analogue converter and outputs a plurality of logical low signals to a N type metal oxide semiconductor field effect transistor digital analogue converter when signals are converted, thus forming a power off current path in the P type and N type metal oxide semiconductor field effect transistor digital analogue converters. Thus, when signals are converted, the P type and N type metal oxide semiconductor field effect transistor digital analogue converters are in high impedance state, and gamma coupling effect is avoided.

Description

technical field [0001] The present invention relates to a driving circuit of a display, and in particular to a source driving circuit of a display. Background technique [0002] A variety of electronic devices have display devices, such as televisions, notebook computers, monitors, and mobile communicators. These display devices need to be light and thin to save the size and cost of the electronic devices. To meet these demands, various flat panel displays (FPDs) have been developed to replace traditional CRT displays. A liquid crystal display (LCD) is one of the flat panel displays. The liquid crystal display device includes a timing controller, a gate driving circuit, a liquid crystal display panel and a source driving circuit. [0003] Generally speaking, the digital image data is transmitted to the liquid crystal display device by a host system, and the external host system is, for example, a graphic source. The format of the digital image data is converted by the tim...

AI Technical Summary

Problems solved by technology

This unexpected situation may cause abnormal operation of the source drive circuit

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