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:
May. 24, 2011
Filed:
Oct. 24, 2005
Takashi Oku, Saitama, JP;
Takeo Arai, Saitama, JP;
Yutaka Ota, Kanagawa, JP;
Yasuhiro Tagawa, Tokyo, JP;
Takashi Oku, Saitama, JP;
Takeo Arai, Saitama, JP;
Yutaka Ota, Kanagawa, JP;
Yasuhiro Tagawa, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
Disclosed is a backlight device for illuminating a transmissive color liquid crystal display panel from its backside with white light. The backlight device includes, as a light source, a plural number of principal light emitting diode units, and a plural number of subsidiary light emitting diode units, where m and n are natural numbers. Each principal light emitting diode unit is made up by a plural number of light emitting diodes () arrayed in a string and emits white light of preset chromaticity. Each subsidiary light emitting diode unit is made up by a plural number of light emitting diodes () arrayed in a string and emits white light of chromaticity in the vicinity of the preset chromaticity. The number of the subsidiary light emitting diode units is smaller than that of the principal light emitting diode units. When the principal light emitting diode units and the subsidiary light emitting diode units are arrayed in a two-dimensional matrix, the subsidiary light emitting diode unitsare arrayed without being juxtaposed on the same row, and the subsidiary light emitting diode units, arrayed in a center column of the two-dimensional matrix, are arrayed towards the center of a color liquid crystal display panel ().