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:
Dec. 02, 1997
Filed:
Dec. 27, 1995
Tatsuya Hohmoto, Tokyo, JP;
Hiroshi Murakami, Tokyo, JP;
Kunihiko Karasawa, Tokyo, JP;
Hideo Hara, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric Engineering Co., Ltd., Tokyo, JP;
Abstract
Photocurrents outputted by photo detecting circuits (1.sub.1 to 1.sub.n) disposed in first current paths (2.sub.1 to 2.sub.n) are amplified by current amplifying means (3.sub.1 to 3.sub.n) disposed in the first current paths (2.sub.1 to 2.sub.n), respectively. The output currents from the plurality of current amplifying means (3.sub.1 to 3.sub.n) are converted into voltage all by one current-voltage converting means (5). The current amplifying means (3.sub.1 to 3.sub.n) are turned on or off by control signals (3.sub.1S to 3.sub.nS), and therefore the luminance detecting circuit amplifies the current of the required photo detecting element only, and outputs into the current-voltage converting means (5).