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. 28, 2023
Filed:
Nov. 13, 2020
Citizen Electronics Co., Ltd., Fujiyoshida, JP;
Nichia Corporation, Anan, JP;
Byungchul Hong, Yokohama, JP;
Naoki Sako, Yokohama, JP;
Naoto Kijima, Yokohama, JP;
Masahiko Yoshino, Yokohama, JP;
Takashi Hase, Yokohama, JP;
Fumiko Yoyasu, Yokohama, JP;
Kentarou Horibe, Ushiku, JP;
CITIZEN ELECTRONICS CO., LTD., Fujiyoshida, JP;
NICHIA CORPORATION, Anan, JP;
Abstract
To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.