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:
Nov. 12, 2019
Filed:
Dec. 20, 2017
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Materials Co., Ltd., Yokohama-shi, Kanagawa-ken, JP;
Masahiko Yamakawa, Yokohama Kanagawa, JP;
Ryoji Tsuda, Fujisawa Kanagawa, JP;
Yasumasa Ooya, Chigasaki Kanagawa, JP;
Tatsunori Itoga, Kamakura Kanagawa, JP;
Yasuhiro Shirakawa, Yokohama Kanagawa, JP;
Junji Taniguchi, Yokosuka Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Materials Co., Ltd., Kanagawa-ken, JP;
Abstract
According to one embodiment, there is provided a white light source system including white light sources. An absolute value of a difference between (P(λ)×V(λ))/(P(λmax1)×V(λmax1)) and (B(λ)×V(λ))/(B(λmax2)×V(λmax2)) for each of the white light sources satisfies a relational expression represented by|(((λ)×(λ))/((λmax1)×(λmax1))−((λ)×(λ))/((λmax2)×(λmax2))|≤0.15 The white light source system has a light emission characteristic of white light emitted by the system is continuously changed along with an elapse of time by changing a mixing ratio of light beams from the white light sources.