Optical: systems and elements – Diffusing of incident light
Reexamination Certificate
2007-06-05
2009-02-17
Nguyen, Thong (Department: 2872)
Optical: systems and elements
Diffusing of incident light
C359S831000, C362S620000, C362S627000
Reexamination Certificate
active
07492520
ABSTRACT:
A light source apparatus is provided. The light source apparatus includes: a light-emitting portion; a light-guiding plate having the light-emitting portion disposed at a side surface thereof, light beams being emitted from a top surface of the light-guiding plate; and a light path converting sheet above the light-guiding plate, formed of a prism sheet including cylindrical prisms, a cross-section of which is an isosceles triangle. Each of the prisms includes a light incidence plane that forms a first equilateral constituting an apex angle of the isosceles triangle, a reflection plane that forms a base of the isosceles triangle and a light exit plane that forms a second equilateral constituting the apex angle of the isosceles triangle The prism is disposed such that the light incidence plane is approximately perpendicular to a direction of light beams with highest luminous intensity among the light beams emitted from the top surface of the light-guiding plate.
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Bell Boyd & Lloyd LLP
Nguyen Thong
Sony Corporation
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