LCD device repairing line operation amplification circuit and its drive method

Abstract

The present invention discloses a repairing line operational amplifying circuit of a liquid crystal display devices and a driving method thereof; the amplifying circuit shortens the time of an end of the repairing line reaching a normal image signal voltage. The technical proposal is that: the circuit of the invention comprises a first MOS tube in which a grid is connected with a control signal, a drain is grounded and a source cathode is connected with a high-level voltage via a first resistor; an operational amplifier in which a first input end is connected with the central voltage of a gray scale voltage via a second resistor, a second input end is connected with a voltage of the repairing line image signal, and an output end is connected with the repairing line; a second MOS tube in which the grid is connected with the source cathode of the first MOS tube, a third resistor is connected between the source and the drain, and the source and the drain are connected between the first input end and the out end of the operational amplifier. The present invention is applied in the liquid crystal display device filed.

Description

technical field [0001] The invention relates to a repair line operation amplifier circuit of a liquid crystal display device and a driving method thereof, in particular to a repair line operation that can improve repair line RC delay caused by too large repair line RC delay caused by insufficient charging of the repair line due to the increase in the size of the liquid crystal display Amplifying circuit and its driving method. Background technique [0002] Liquid crystal displays are currently one of the most widely used types of flat panel display devices. A liquid crystal display generally includes two substrates—an array substrate and a color filter substrate—and a liquid crystal layer between two panels having pixel electrodes and a common electrode for generating an electric field. A liquid crystal display displays an image by applying a voltage to an electric field generating electrode to generate an electric field in a liquid crystal layer. This electric field deter...

AI Technical Summary

Problems solved by technology

[0018] In recent years, with the increase of the size of the liquid crystal display, the RC delay of the gate line and the source line has become more and more serious, and the delay of the repair line is even more serious, because the repair line needs to wrap half a circle around the LCD panel, and its The length is much longer than the gate line and source line, so its resistance is relatively large. In order to solve the problem of RC delay of the repair line, it is not enough to simply increase the drive capacity of the repair line operational amplifier, and a better solution must be found

Images