Controlled viewing angle display apparatus

Details Controlled viewing angle display apparatus Controlled viewing angle display apparatus

2005-10-13

2009-06-16

Hammond, Briggitte R (Department: 2833)

Illumination

Edge lighted panel

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

C362S600000, C362S613000, C362S628000, C349S065000

Reexamination Certificate

active

07547129

ABSTRACT:
A light source apparatus permits an angular range of illumination light to be changed, wherein the apparatus can be made thin. A related display apparatus permits a visible angular range to be changed using the light source apparatus. The display apparatus can be mounted in a terminal device, ahd an optical member and an optical unit can be incorporated in the light source apparatus. The light source apparatus is provided with a light guide plate with a conical sheet. Two light sources are provided on side surfaces of the light guide plate. Two inclined surfaces whose inclination angles to a light output surface differ from each other are formed at a light diffusion surface of the light guide plate. The conical sheet is provided with a flat plate portion on which a plurality of cones are formed. The cones protrude toward the light guide plate.

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