The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2009
Filed:
Jun. 05, 2007
Kazuhiro Yokota, Saitama, JP;
Kazuhiro Yokota, Saitama, JP;
Sony Corporation, Tokyo, JP;
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.