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:
Aug. 03, 2010
Filed:
Jul. 25, 2007
Mitsunari Hoshi, Miyagi, JP;
Shigehiro Yamakita, Miyagi, JP;
Shogo Shinkai, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
Using a distance L between the centers of light sources; a refractive index n of an optical element; a thickness d of the optical element; a distance W from the center of the light source to the optical element; a refractive index nof air; an angle of incidence θof light emitted from the light sources and coming into the optical element, relative to the direction of optical axes; an angle of refraction θof light, incident on the optical element, in the optical element; a diameter of each light source as D; and a maximum tangential angle a formed between a tangential line in contact with an outer surface of a luminance distribution generating layerand a plane orthogonal to the optical axes, there is included a maximum tangential angle a satisfying x>L/2−D/2 when calculating a travel range x of a split image of the light sources in a direction normal to the optical axes using (1) nsin(a)=n sin(a−θ), (2) nsin θ=n sin θand (3) x=W tan θ+d tan θ. This facilitates uniformalizing of front luminance distribution.