Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-10-06
2009-12-29
Sohn, Seung C (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S206000, C345S102000, C349S061000
Reexamination Certificate
active
07638754
ABSTRACT:
A direct-type backlight device for a non-self-luminous image display panel has a light-emitting area corresponding to a display area of the image display panel. The light-emitting area is arranged by combining a plurality of backlight substrates each of which is provided with (i) a color sensor for detecting an incident light intensity and (ii) red, green, and blue LEDs whose respective light intensities are controlled in accordance with a detection result obtained by the color sensor. This arrangement allows reduction of brightness unevenness entirely in the light-emitting area of the backlight device.
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Inoguchi Tsukasa
Memida Yuhichi
Morimoto Taiji
Nishiyama Nobuhiro
Watanabe Masanori
Morrison & Foerster / LLP
Sharp Kabushiki Kaisha
Sohn Seung C
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