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:
Oct. 21, 2003
Filed:
Nov. 01, 2001
Zane Arthur Coleman, Atlanta, GA (US);
George Thomas Valliath, Buffalo Grove, IL (US);
Jon Lindsay Schindler, Glenview, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A display ( ) includes a slanted fringe volume hologram ( ) or other optical element that steers light that passes into and out of the display ( ) so as to provide angular separation between unmodulated scattered light and modulated reflected light. As a result of the angular separation the effective contrast of the display ( ) is improved. By placing the slanted fringe volume hologram ( ) below a front polarizer of the display a further reduction in the amount of unmodulated scatter light is achieved. The slanted fringe volume hologram is preferably a hologram of a diffusive object ( ), and consequently exhibits a degree of light diffusion that results in a viewing zone of an appreciable angular extent.