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:
Sep. 15, 1998
Filed:
Mar. 06, 1997
Applicant:
Inventors:
Hideki Sunaga, Tokyo, JP;
Masatoshi Suto, Tokyo, JP;
Assignee:
Calsonic Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
3151691 ; 315294 ; 315307 ; 345 47 ; 345 75 ;
Abstract
In the middle of the grid signal wire connecting the grid terminal of the clock drive IC with that of the clock fluorescent display tube, the illumination control circuit is arranged, wherein in accordance with the illumination control signal, the illumination control circuits converts the first grid input signal and the second one by the 1/2 duty signal into the first grid output signal and the second one by a pulse signal, the pulse width of which is changed according to the illumination control signal.