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:
Aug. 09, 2016
Filed:
Oct. 26, 2011
Yoshiaki Ito, Tokyo, JP;
Kazuo Nishi, Kanagawa, JP;
Kei Takahashi, Kanagawa, JP;
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Abstract
A photoelectric conversion device includes at least two photoelectric conversion elements which have voltage-current characteristics different from each other. Further, one of the photoelectric conversion elements has photoelectric conversion efficiency higher than that of the other photoelectric conversion element under the environment in which room light can be obtained. Furthermore, the other photoelectric conversion element has photoelectric conversion efficiency higher than the one of the photoelectric conversion elements under the environment in which sunlight can be obtained. Moreover, each of the voltage of electric power generated in the at least two photoelectric conversion elements is adjusted by one of at least two DC-DC converters corresponding the photoelectric conversion element. In addition, part of the electric power generated in the one of the photoelectric conversion elements is used as drive electric power of the at least two DC-DC converter.