Patent ID: 9059701
Filing Date: 2015-06-16
Classification: G02F,G09G,H01L,H03K

Abstract:
1. An active-matrix liquid crystal display device, wherein a pixel circuit includes a gate circuit, an analog amplifier circuit connected to an output of said gate circuit which is positioned in the neighborhood of each of cross points of scan lines and signal lines which are arranged in a matrix form; wherein said gate circuit of said pixel circuit gates a data voltage on the signal line corresponding to said pixel circuit to said analog amplifier circuit on the basis of a gate scan voltage on the scan line corresponding to the pixel circuit, and when said analog amplifier circuit applies a pixel voltage to a liquid crystal, said liquid crystal displays the pixel corresponding to the pixel voltage thus applied; wherein said gate circuit includes a gate transistor having a gate connected to one of the scan lines, an input connected to one of the signal lines, and an output connected to an input of the analog amplifier circuit, wherein the input of the gate transistor is one of a source and drain of the gate transistor and the output of the gate transistor is the other one of the source and drain of the gate transistor, and said analog amplifier circuit comprises a unipolar first transistor having a multi-gate structure and being a source follower type analog amplifier circuit, the multi-gate structure is equivalently achieved by commonly connecting respective gates of plural unipolar second transistors each having a single gate structure and connecting the plural unipolar second transistors to one another in series, wherein the input of said analog amplifier circuit is a terminal connecting multiple gates of the multi-gate structure, and an output of said analog amplifier circuit is connected to said liquid crystal and provides the pixel voltage to said liquid crystal, wherein the source or drain of the first transistor is directly connected to the scan line.