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:
Jan. 24, 1995
Filed:
Nov. 02, 1992
Kenji Kawabata, Ome, JP;
Soichiro Ogawa, Mizuho, JP;
Susumu Iijima, Ome, JP;
Kunio Seki, Hinode, JP;
Hirotaka Mochizuki, Fujioka, JP;
Makoto Goto, Takasaki, JP;
Ryuichi Ikeda, Yokohama, JP;
Motohiro Sugino, Fujisawa, JP;
Kenichi Onda, Hitachi, JP;
Hitachi, Ltd., all of, JP;
Hitachi Microcomputer System, Ltd., all of, JP;
Hitachi Video & Information System, Inc., all of, JP;
Abstract
An information processing apparatus employs a liquid crystal display and a fluorescent lamp for backlighting the screen of the liquid crystal display. A lighting circuit for supplying alternating current lighting power to the fluorescent lamp receives input power from either a commercial alternating current power source or from a direct current battery. The level of the lighting power supplied to the fluorescent lamp is determined based upon a determination of whether the input power is being supplied from the commercial power source or from the battery.