Title:
COLOR DISPLAY DEVICE AND METHOD FOR DRIVING THE SAME
Document Type and Number:
WIPO Patent Application WO/2005/111705
Kind Code:
A1
Abstract:
A color display device in which each unit pixel comprises a first sub-pixel and a second sub-pixel that has a color filter and wherein medium, which changes its optical characteristic in accordance with a voltage applied thereto, is placed in each sub-pixel. The color display device further comprises means for applying, to the first sub-pixel, the voltage that modulates the optical characteristic of the medium, placed in the first sub-pixel, in a range where the lightness of a passing light and the hue of chromatic color vary; means for applying, to the second sub-pixel, the voltage that modulates the optical characteristic of the medium, placed in the second sub-pixel, in a range where the lightness of a passing light varies; means for calculating, upon switching of displays, a correction voltage of the second sub-pixel from the voltage applied to the first sub-pixel prior to the switching of the displays and also from the voltage applied to the first sub-pixel after the switching the displays; and means for applying, to the second sub-pixel, a voltage obtained by superimposing a correction voltage on the voltage of the second sub-pixel, in accordance with the display as switched, for a predetermined interval after switching the voltage applied to the first sub-pixel. The colordisplay device mixes, with the color of the second sub-pixel, the chromatic color transiently occurring in the first sub-pixel upon switching of displays so as to provide achromatic color.
Inventors:
ASAO YASUFUMI (JP)
ISOBE RYUICHIRO (JP)
ISOBE RYUICHIRO (JP)
Application Number:
PCT/JP2005/009212
Publication Date:
November 24, 2005
Filing Date:
May 13, 2005
Export Citation:
Assignee:
CANON KK (JP)
ASAO YASUFUMI (JP)
ISOBE RYUICHIRO (JP)
ASAO YASUFUMI (JP)
ISOBE RYUICHIRO (JP)
International Classes:
G02F1/133; G02F1/1343; G09G3/20; G09G3/36; G02F1/1335; G02F1/139; (IPC1-7): G02F1/133; G02F1/1335; G02F1/1343; G09G3/20; G09G3/36
Foreign References:
| JPH09251160A | 1997-09-22 | |||
| JPH09230310A | 1997-09-05 | |||
| JPH09113868A | 1997-05-02 |
Attorney, Agent or Firm:
Yamada, Ryuichi (Hasegawa Bldg. 4F 7-7, Toranomon 3-chom, Minato-ku Tokyo, JP)
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