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. 03, 1995
Filed:
Feb. 12, 1993
Applicant:
Inventors:
Hiroyuki Motegi, Yokohama, JP;
Takeshi Nakashiro, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ; G06F / ;
U.S. Cl.
CPC ...
327544 ; 327546 ; 345 98 ;
Abstract
A semiconductor device for a liquid crystal panel driving power supply in which a first reference voltage is converted in impedance by an operational amplifier to output it as a second reference voltage, comprising control means wherein, in a suitable fixed period during a period of displaying a liquid crystal, the current supply capacity of said operational amplifier is enhanced, and, in another period during said period of displaying a liquid crystal, the current supply capacity of said operational amplifier is lowered.