The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2001
Filed:
Apr. 05, 1999
Applicant:
Inventors:
Ryuuichi Someya, Fujisawa, JP;
Nobuaki Kabuto, Kunitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 3/36 ; G09G 5/10 ; G09G 5/02 ;
U.S. Cl.
CPC ...
G09G 3/36 ; G09G 5/10 ; G09G 5/02 ;
Abstract
The apparent changes of color tones are suppressed by changing the characteristics of the voltage applied to the liquid crystal according to the switching-over of the light source intensity. Therefore, the disturbed color tones caused by a variation of the light source emission spectrum are compensated. The light source can be controlled practically, so that the liquid crystal display is sophisticated by implementing the power saving mode and extending the adjusting range of the contrast and bright levels.