Surface light source and light guide used therefor

Details Surface light source and light guide used therefor Surface light source and light guide used therefor

2006-11-21

2006-11-21

Pak, Sung (Department: 2874)

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

C362S620000

Reexamination Certificate

active

07139464

ABSTRACT:
A light guide (4) for guiding light emitted from a primary light source (2), having a light incident face (41) which light emitted from the primary light source (2) enters and a light emitting face (43) from which the guided light is emitted. The light emitting face (43) is uneven surface having a large number of micro convex curved surface areas. The average slant angle θa is 0.3° to 30°. The ten-point average roughness Rz is 0.7 μm to 10 μm. A light deflector (6) composed of a prism sheet is disposed beside the light emitting face (43).

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