Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2002215116
Kind Code:
A
Abstract:

To suppress an irreversible change (deterioration) of a liquid crystal during long term driving.

When driving a liquid crystal display device which displays a picture by applying a potential to the liquid crystal to control the optical characteristic, a still picture state is detected, and the potential to be applied to the liquid crystal is lowered. When a high potential is continued to be applied to the liquid crystal, but the potential is periodically or irregularly lowered momentarily, the irreversible change (deterioration) is reduced to be caused. This is because the direction of electric moment and strength of the liquid crystal molecules are changed only at the moment of the potential change, and one-sided movement of electric charges causing the irreversible change is reduced to occur.


Inventors:
HAYAKAWA TAKUJI
IMAI MASAHITO
WATANABE SHINJI
Application Number:
JP2001014959A
Publication Date:
July 31, 2002
Filing Date:
January 23, 2001
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SONY CORP
International Classes:
G02F1/1333; G02F1/133; G09G3/20; G09G3/36; (IPC1-7): G09G3/36; G02F1/133; G02F1/1333; G09G3/20
Domestic Patent References:
JPH1124040A1999-01-29
JP2000330539A2000-11-30
JPH06102845A1994-04-15
JPH1144871A1999-02-16
JPH0954307A1997-02-25
JPH03231796A1991-10-15
JPH09251153A1997-09-22
JP2000098980A2000-04-07
JPH10239664A1998-09-11
Attorney, Agent or Firm:
Akira Koike (2 outside)



 
Previous Patent: LIQUID CRYSTAL DISPLAY PANEL, LIQUID CRYSTAL DISPLAY DEVICE, AND THEIR DRIVING CIRCUIT AND METHOD, A...

Next Patent: LIQUID CRYSTAL DISPLAY DEVICE WITH FLICKER REDUCED AND FLICKER REDUCTION METHOD