Light guide plate for a display panel having arcuate grooves...

Liquid crystal cells – elements and systems – Particular structure – Particular illumination

Reexamination Certificate

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Details

C349S062000, C362S615000, C362S617000, C385S146000, C385S901000

Reexamination Certificate

active

07663713

ABSTRACT:
A liquid crystal display device includes a liquid crystal panel and an illumination device. The illumination device has a light guide plate and at least one spot light source on at least one side surface of the light guide plate. The light guide plate includes a large number of upper-surface arcuate cross-sectional grooves in a direction orthogonal to the one side surface on a surface thereof which faces the liquid crystal panel, and a large number of light-incident-surface arcuate cross-sectional grooves are formed in a thickness direction of the light guide plate on at least a portion of the one side surface which faces a position at which the spot light source is arranged. A relationship is provided between a contact angle Oa of the upper-surface arcuate cross-sectional grooves and a contact angle Ea of the light-incident-surface arcuate cross-sectional grooves.

REFERENCES:
patent: 7101070 (2006-09-01), Yu et al.
patent: 2004/0114068 (2004-06-01), Yu et al.
patent: 2004/0120139 (2004-06-01), Kunimochi et al.
patent: 2004/0246698 (2004-12-01), Shimizu et al.
patent: 09113907 (1997-05-01), None

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