SOURCE DRIVER CIRCUIT OF LIQUID CRYSTAL DISPLAY DEVICE

Title:

SOURCE DRIVER CIRCUIT OF LIQUID CRYSTAL DISPLAY DEVICE

Document Type and Number:

WIPO Patent Application WO/2011/093550

Kind Code:

A1

Abstract:

The present invention relates to a technique for preventing noise data from being displayed before valid data is inputted when a liquid crystal display device is powered on. The invention comprises: a power voltage input unit which divides a VCC power voltage and a VDD power voltage, and outputs the divided voltages, wherein the voltages are divided and outputted by setting an intermediate level of the VDD power voltage to be lower than a level of the VCC power voltage; a power voltage comparator which compares the voltages inputted after having been divided by the power voltage input unit, and outputs an output voltage in a "high" state at a section in which the level of the VCC power voltage is shown in the higher state than the intermediate level of the VDD power voltage; a Schmitt trigger which outputs the output voltage of the power voltage comparator as a reset signal, wherein it prevents the reset signal to sensitively react to the external environment; and a particular voltage supplier which outputs a voltage of a particular level at a section between a first gate start pulse and the reset signal inputted from the Schmitt trigger.

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Inventors:

LIM HUN YONG (KR)
CHOI JUNG HWAN (KR)
KIM AN YOUNG (KR)
NA JOON HO (KR)
KIM DAE SEONG (KR)
HAN DAE KEUN (KR)

Application Number:

PCT/KR2010/001551

Publication Date:

August 04, 2011

Filing Date:

March 12, 2010

Export Citation:

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Assignee:

SILICON WORKS CO LTD (KR)
LIM HUN YONG (KR)
CHOI JUNG HWAN (KR)
KIM AN YOUNG (KR)
NA JOON HO (KR)
KIM DAE SEONG (KR)
HAN DAE KEUN (KR)

International Classes:

G09G3/36; G09G3/20

Foreign References:

KR20060047139A	2006-05-18
KR20070042363A	2007-04-23
KR20050056469A	2005-06-16
JPH0720439A	1995-01-24

Attorney, Agent or Firm:

LEE, CHEOL HEE (KR)
이철희 (KR)

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