US 7,609,242 B2Granted

Liquid crystal display and integrated driving circuit thereof

AssigneeAu Optronics Corporation

InventorsMin-Chien Kuo, Chi-Mao Hung

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Abstract

A liquid crystal display apparatus includes a liquid crystal display module, an integrated driving circuit, and a power supply circuit. The integrated driving circuit is used for driving the liquid crystal display module to display video frames according to a video signal. The integrated driving circuit includes a pulse width modulation (PWM) control circuit for generating N PWM signal sequentially, where N is a positive integer. The power supply circuit is employed to output N DC voltage signals sequentially. A part of the N DC voltage signals is applied to the liquid crystal display module and another part of the N DC voltage signals is applied to the integrated driving circuit.

Claims13

Dependent claims

An integrated driving circuit for use in a liquid crystal display apparatus including a liquid crystal display module and a power supply circuit, the power supply circuit being adapted to provide N DC voltages sequentially according to N pulse width modulation (PWM) signals, N being a positive integer, the integrated driving circuit comprising:

a video signal processor for generating pixel data applied to the liquid crystal display module according to a video signal;
a timing control circuit for controlling the liquid crystal display module in order to display video frames;
and
a PWM control circuit for generating the N PWM signals sequentially according to N feedback signals outputted by the power supply circuit when the integrated driving circuit is enabled;
wherein parts of the N DC voltages are applied to the liquid crystal display module and another parts of the N DC voltages are applied to the integrated driving circuit.

2 more elements

A liquid crystal display apparatus comprising:

a liquid crystal display module;
an integrated driving circuit for driving the liquid crystal display module to display video frames according to a video signal, the integrated driving circuit comprising:
a pulse width modulation (PWM) control circuit for generating N PWM signals sequentially, where N is a positive integer;
and
a power supply circuit for outputting N DC voltages sequentially according to the N PWM signals, a first set of the N DC voltages being applied to the liquid crystal display module and a second set of the N DC voltages being applied to the integrated driving circuit.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/212,878Filed 29 Aug 2005
Priority: TW 94107931 A15 Mar 2005
Published: US 2006/0208989 A121 Sep 2006
Granted: 27 Oct 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G09G 3/3696
Control of matrices with row and column drivers: generation of voltages supplied to electrode drivers
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 2330/026
Details of power systems and of start or stop of display operation: arrangements or methods related to booting a display
G09G 2330/04
Aspects of power supply; Aspects of display protection and defect management: display protection

Family

US 2006/0208989 A1Pre-grant publication · published 21 Sep 2006
US 7,609,242 B2This patent

From the US filing history. Foreign family members aren’t listed.

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