US 2003/0227430 A1 · [DRIVE CIRCUIT OF TFTLCD]

Abstract

A drive circuit of a thin-film transistor type liquid crystal display. A plurality of source drivers is connected in series. Each of the source drives has a charge pump therein to compensate the voltage drop caused by the metal wires for connecting the neighboring source drivers. The charge pump is preferably disposed at an input of the power line. A capacitor is further connected to each of the power lines for rectifying and filtering the power source transmitted by the power lines. The drive circuit also has a plurality of gate drivers. When the voltage drop caused by the power transmission line between the gate drivers is significant enough to affect a normal operation of the gate drivers, the charge pump is installed in each of the gate drivers.

Claims13

Dependent claims

A drive circuit of a thin-film transistor type liquid crystal display, comprising at least a plurality of source drivers, wherein each source driver further comprises a charge pump to compensate a voltage drop caused by at least a power line for transmitting power between the source drivers.

Dependencies are inferred from the claim text.

Facts

Application

10/250,032Filed 30 May 2003

Priority

TW 911120545 Jun 2002

Published

11 Dec 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

G09G 3/36
By control of light from an independent source: using liquid crystals
G09G 2330/02
Aspects of power supply; Aspects of display protection and defect management: details of power systems and of start or stop of display operation
G09G
Arrangements or circuits for control of indicating devices using static means to

[drive circuit of tftlcd]

Life of this patent

[drive circuit of tftlcd]

Life of this patent

Abstract

Claims13