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:
Jul. 20, 2010
Filed:
Oct. 04, 2007
Takayuki Matsubara, Matsumoto, JP;
Takayuki Matsubara, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A lighting device includes: a light source unit which supplies coherent light; a polarized light splitting unit which reflects first polarized light having first oscillation direction and transmits second polarized light having second oscillation direction substantially orthogonal to the first oscillation direction to split the first polarized light from the second polarized light; a reflection unit which reflects light advancing in a direction other than the lighting direction from the polarized light splitting unit; a partial reflection unit disposed between the polarized light splitting unit and the reflection unit to transmit a part of entering light and reflect the other part of the entering light; and a wavelength plate disposed between the polarized light splitting unit and the partial reflection unit to vary polarization condition of entering light.