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. 12, 2011
Filed:
Mar. 07, 2007
Tomokazu Tokunaga, Hyogo, JP;
Eiichi Nagaoka, Hyogo, JP;
Minoru Onoda, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A prism () is in the form of a polygonal prism and has a first optical surface (), a second optical surface () and a third optical surface () formed on different surfaces of the prism. A light entrance region () is provided at the center of the first optical surface (), a light exit region () is provided at the center of the second optical surface () and a substantially flat light reflecting region () is provided at the center of the third optical surface (). Suppose that there is a virtual surface between the light reflecting region () and the first optical surface (), the virtual surface is positioned more inward in the prism than a peripheral region of the third optical surface () extending from the light reflecting region () to an edge () between the third optical surface () and the first optical surface ().