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:
Apr. 21, 2009
Filed:
Nov. 21, 2005
Huei Pei Kuo, Palo Alto, CA (US);
Lawrence M. Hubby, Jr., Palo Alto, CA (US);
Steven L Naberhuis, Palo Alto, CA (US);
Huei Pei Kuo, Palo Alto, CA (US);
Lawrence M. Hubby, Jr., Palo Alto, CA (US);
Steven L Naberhuis, Palo Alto, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
In a particular, a high contrast projection system configured for front or rear projection includes a screen having a viewing side and a back side opposite thereto. The screen includes a transparent layer of material having louver members disposed therein to provide fractional reflective coverage across the width of the transparent material. The screen discriminates an image signal light from a source, such as a projector, from ambient light incident upon the viewing surface. The image signal light is redirected over a range of angles relative to a normal to the viewing side, while the majority of ambient light is directed generally toward the back side, for example passing through the transparent material between louver members. A light absorbing back panel adjacent to the back side absorbs the ambient light further improving contrast.