Optical unit, backlight device, liquid crystal module and...

Details Optical unit, backlight device, liquid crystal module and... Optical unit, backlight device, liquid crystal module and...

2009-02-25

2010-10-26

Husar, Stephen F (Department: 2875)

Illumination

Display backlight

Lcd backlight

C362S331000, C362S607000, C349S061000, C359S621000

Reexamination Certificate

active

07819543

ABSTRACT:
An optical unit for use in a backlight device of a liquid crystal display apparatus, has a first light-collecting and -diffusing optical component, a light-collecting optical component, and a second light-collecting and -diffusing optical component, provided in this order on the optical path of light emitted from a light source. Each light-collecting and -diffusing optical component has a surface provided on which are a plurality of microlenses each having a shape of a hemisphere- or semi-oval-like protrusion, with light collecting and diffusing functions. The light-collecting optical component has a surface provided on which are a plurality of prisms each having a saw-teeth like section, with a light collecting function. Each surface is provided on a light-emitting side of the optical unit.

REFERENCES:
patent: 6147802 (2000-11-01), Itoh et al.
patent: 6151166 (2000-11-01), Matsushita et al.
patent: 7645057 (2010-01-01), Kim et al.
patent: 2009/0129058 (2009-05-01), Tokita et al.
patent: 2008-003243 (2008-01-01), None
patent: 2008-046601 (2008-02-01), None
patent: WO 2007/148815 (2007-12-01), None
European Search Report (Jun. 18, 2009—6 pages).

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