Plane light source unit

Details Plane light source unit Plane light source unit

G - Physics

02

F

240/152

G02F 1/133 (2006.01) F21V 8/00 (2006.01) G02B 6/04 (2006.01) G02F 1/01 (2006.01) G02B 6/00 (2006.01)

Patent

CA 1312320

PLANE LIGHT SOURCE UNIT ABSTRACT OF THE DISCLOSURE A plane light source unit is provided which comprises a first element having a light incident face at least at one side end thereof and a first light emitting surface extending perpendicularly to the light incident face, the first element further having a reflecting layer provided on a surface thereof opposite to the first light emitting surface, and a second element having a light incident surface which receives the light emitted by the first element and a second light emitting surface through which light is emitted in a predetermined direction, the first light emitting surface and/or the opposite surface of the first element having a directive function to cause incident light through the light incident face to emit through the first light emitting surface in a direction oblique to the direction of the light, the second element having a large number of prism units formed on the light incident surface thereof. The plane light source unit is advantageously used as a backlighting means for a liquid crystal display device or the like.

582639

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