Driving circuit of liquid crystal display

Abstract

A driving circuit of a liquid crystal display includes: a timing controller to output a gate control signal and a data control signal to control driving of a gate driving unit and a data driving unit and to output digital video data; a pair of gate driving units to be alternately driven by using at least one frame as a period to supply gate signals to gate lines of a liquid crystal panel in-response to the gate control signal; and a data driving unit to supply pixel signals to data lines of the liquid crystal panel in response to the data control signal. Degradation of characteristics of transistors constituting each gate driver can be prevented.

Description

technical field [0001] The present invention relates to a technique for driving a liquid crystal panel of a liquid crystal display (LCD), and more particularly, to an LCD drive circuit capable of avoiding deterioration of characteristics of transistors constituting a gate drive unit and elements of the gate drive unit. Background technique [0002] Recently, with the continuous progress of information technology (IT), the importance of flat panel display devices as a visual information transmission medium has been further strengthened, and in order to gain a competitive advantage in the future, flat panel display devices are required to have low power consumption, thinner and lighter and With high image quality. A liquid crystal display (LCD), a typical display device of a flat panel display device, displays images by using optical anisotropy of liquid crystals. Taking advantage of being thinner and smaller, having low power consumption and high image quality, LCDs are wide...

AI Technical Summary

Problems solved by technology

[0019] Therefore, in the related art LCD, when the gate driving unit outputs the gate signal to each gate line of the liquid crystal panel, during a short period of time, a high-level gate voltage is supplied to the charge transistor, and thus the characteristics deteriorate relatively slowly. conduct

Meanwhile, the discharge transistor of each gate drive unit receives a high-level gate voltage for a longer period of time than the charging time of the charge transistor, so characteristic degradation proceeds much faster

This causes a problem that the discharge time of the gate line is prolonged, so that the interval to be kept in the OFF state is not cut off and an abnormal voltage is output

[0020] In addition, the charging transistor T U and discharge transistor T D are realized by a-Si:H, resulting in a charging transistor T PU and discharge transistor T PD Has the disadvantage of low mobility

Therefore, the related art LCD has a problem that the gate line is not discharged within the row time

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