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:
Mar. 13, 2012
Filed:
Feb. 18, 2009
Tadashi Chiba, Tokyo, JP;
Tadashi Chiba, Tokyo, JP;
Oki Semiconductor Co., Ltd., Tokyo, JP;
Abstract
A light quantity measuring device includes a first light reception element, a second light, reception element, an identification circuit, and a selection circuit. The first light reception element receives a predetermined incident light at a first light reception surface. The second light reception element receives the incident light at a second light reception surface, which is oriented in the same direction as the first light reception surface. The identification circuit identifies an incident angle of the incident light with respect to the first light reception surface. The selection circuit, when the incident angle differs from a desired incident angle, selectively electrically connects an output portion of the second light reception element to an output portion of the first light reception element.