Back light unit and display apparatus using the same

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United States of America Patent

PATENT NO 8827492
APP PUB NO 20120147277A1
SERIAL NO

13298322

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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To provide a back light unit that reduces an uneven brightness and has a spatially uniform brightness distribution. According to an aspect of the present invention, the back light unit comprises an LED and a light guide plate for guiding light from the LED to a liquid crystal panel side, wherein a recess is provided on the back surface side of the light guide plate, wherein a plurality of LEDs are housed in the recess, and wherein a light amount limiting member is provided at a position facing the recess on s light exit surface side of the light guide plate. The light amount limiting member is configured, for example, by applying an ink with a predetermined optical property to a transparent sheet.

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Patent Owner(s)

  • MAXELL, LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Inoue, Hajime Obihiro, JP 126 2056
Nagayoshi, Mayumi Chofu, JP 19 91
Ouchi, Satoshi Kamakura, JP 158 1410
Yamamoto, Shoji Fujisawa, JP 108 1420

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