Light source device

Details Light source device Light source device

2006-02-28

2006-02-28

Ward, John Anthony (Department: 2875)

Illumination

Edge lighted panel

Light modifier with emission face combined with light guide...

C362S026000, C362S308000, C362S326000, C362S330000

Reexamination Certificate

active

07004610

ABSTRACT:
The index of refraction of a light guide (6) for transmitting light outputted from a primary light source (1) is ng, and the light guide (6) has a light input end face (9), a light output surface from which the transmitted light is outputted, and a back surface opposed to the light output surface. A leaky ray modulator (8) is provided to at least either the light output surface or the back surface. The leaky ray modulator (8) has a composite layer (50) provided on the light output surface or the back surface and composed of first refractive index regions (3) having a refractive index n1(ng>n1) and second refractive index regions (4) having a refractive index n2(n2>n1) and a third refractive index layer (5) provided on the composite layer (50) and having a refractive index n3(n3>n1). A reflecting plate (7) is provided adjacent to the back surface of the light guide (6).

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