Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2008-01-17
2011-11-15
Ullah, Akm (Department: 2874)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C362S620000
Reexamination Certificate
active
08059229
ABSTRACT:
A light control element capable of controlling deflection of light output through a light guide plate to a desired output viewing angle is provided. A light control element (prism sheet) has a plane of incidence on one surface thereof, and a plane of output on the other surface thereof. The plane of incidence is formed as having thereon a number of prism portions arrayed in parallel. Each of the prism portions has a first prism surface allowing incidence of light, and a second prism surface where the light entering through the first prism surface is reflected by total reflection on the inner side. The second prism surface has an outwardly-swelled curved profile, formed with a curvature that allows the light to output through the plane of output at a second output viewing angle wider than a first output viewing angle of a case where the second prism surface is flat.
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Aoki Makoto
Doi Katsuhiro
Kimura Kiyohiro
Kudo Yasuyuki
Shinkai Shogo
K&L Gates LLP
Sony Corporation
Ullah Akm
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