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:
Feb. 16, 2010
Filed:
Aug. 09, 2005
Shuichi Haga, Kanagawa, JP;
Koichiro Kakinuma, Tokyo, JP;
Takehiro Nakatsue, Kanagawa, JP;
Tatsuhiko Matsumoto, Tokyo, JP;
Yasuhiro Tagawa, Tokyo, JP;
Yutaka Ota, Kanagawa, JP;
Takashi Oku, Saitama, JP;
Takeo Arai, Saitama, JP;
Shuichi Haga, Kanagawa, JP;
Koichiro Kakinuma, Tokyo, JP;
Takehiro Nakatsue, Kanagawa, JP;
Tatsuhiko Matsumoto, Tokyo, JP;
Yasuhiro Tagawa, Tokyo, JP;
Yutaka Ota, Kanagawa, JP;
Takashi Oku, Saitama, JP;
Takeo Arai, Saitama, JP;
Sony Corporation, Tokyo, JP;
Abstract
Disclosed is a backlight device used for a color liquid crystal display (LCD) apparatus. The red light, green light and blue light, generated by a light source, made up by a red light emitting diode (R), a green light emitting diode (G) and a blue light emitting diode (B), respectively, are mixed together to generate white light. The red light has a half-value width hwr such that 15 nm≦hwr≦30 nm, and the green light has a half-value width hwg such that 25 nm≦hwg≦50 nm. The blue light has a half-value width hwb such that 15 nm≦hwb≦30 nm. The white light illuminates a transmissive color liquid crystal display panel () from its back side. The transmissive color liquid crystal display panel includes a color filter () made up by a tristimulus filter for wavelength-selecting and transmitting red light, green light and blue light.