Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2006-12-25
2010-12-28
Heyman, John (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C349S062000, C349S065000, C362S608000, C362S611000, C362S553000, C362S625000, C359S027000, C372S050230
Reexamination Certificate
active
07859610
ABSTRACT:
The present invention provides a planar lighting device (1) including: a laser light source (12) which emits a linearly-polarized laser beam; an optical member (13) which receives the laser beam, then parallelize the laser beam, and emits the parallelized laser beam; and a first plate-shaped light guide (20) which receives the parallelized laser beam from an end face portion (20d) and emits the parallelized laser beam from a first major surface (20b). The first light guide includes an optical element (20a) which receives the linearly-polarized parallelized laser beam propagated through the first light guide and emits at least a part of the linearly-polarized parallelized laser beam in a direction substantially vertical to the first major surface. The present invention also provides a liquid crystal display device (3) using the planar lighting device (1) as a backlight lighting device.
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Itoh Tatsuo
Kadowaki Shin-ichi
Kasazumi Ken'ichi
Mizushima Tetsuro
Yamamoto Kazuhisa
Heyman John
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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