Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2011-07-12
2011-07-12
Nguyen, Hoan C (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C349S062000, C349S063000, C349S064000, C349S065000, C349S066000, C362S611000, C362S612000, C362S613000, C362S614000, C345S087000, C257S088000
Reexamination Certificate
active
07978285
ABSTRACT:
A surface light source includes a light source which selectively irradiates two polarized light beams in polarized states different from each other, a light guide plate which includes a transparent plate having two plate surfaces facing each other and end faces surrounding the plate surfaces, and irradiates the two polarized light beams form an irradiation surface, and an optical element which irradiates irradiated light from the irradiation surface of the light guide plate toward a direction substantially normal to the light guide plate upon changing the propagation direction of the irradiated light. A liquid crystal display apparatus includes this surface light source, a polarization control element which is placed on the observation side of the surface light source and rotates the polarization plane of linearly polarized light transmitted through one of partitioned first and second areas through a predetermined angle, and a liquid crystal display device placed on the observation side.
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Korean Office Action dated May 29, 2009 and English translation thereof issued in a counterpart Korean Application No. 10-2008-0024732.
Casio Computer Co. Ltd.
Holtz Holtz Goodman & Chick PC
Nguyen Hoan C
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