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US Patent 7476015 Backlight apparatus and liquid crystal display apparatus

Patent 7476015 was granted and assigned to Sony on January, 2009 by the United States Patent and Trademark Office.

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Patent
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Patent attributes

Current Assignee
Sony
Sony
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
74760150
Patent Inventor Names
Takeo Arai0
Masato Hatanaka0
Date of Patent
January 13, 2009
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Patent Application Number
111192690
Date Filed
April 30, 2005
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Patent Primary Examiner
‌
Ismael Negron
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Patent abstract

A low-profile edge-lit backlight apparatus includes a light guiding plate which guides light introduced from a side by utilizing total reflection on a light emitting surface as one principal surface and a light reflecting surface as the other principal surface and emits light from the light emitting surface based on surface emitting, and a plurality of white light emission units that emit white light incident on the light guiding plate. The white light emission section includes a light source group of a first light emitting diode to emit first primary color light, a second light emitting diode to emit second primary color light, and a third light emitting diode to emit third primary color light which are arranged in a row, and a color mixing section that generates white light by mixing the first primary color light, the second primary color light, and the third primary color light.

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