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. 12, 1999
Filed:
Oct. 24, 1996
Applicant:
Inventors:
Nobuaki Koshoubu, Kariya, JP;
Masao Tokunaga, Gamagori, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
345 94 ; 345 55 ;
Abstract
Burning and flickering effects of a display screen in a matrix-type liquid crystal display device using an anti-ferroelectric liquid crystal medium are avoided by controlling the duration of the holding period to a certain length. A control circuit measures the cycle of the input of the picture signals to one picture frame, and the duration of the blanking period is controlled according to the result of the measurement in order to keep the duration of the holding period constant.