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. 16, 1996
Filed:
Oct. 05, 1993
Jonathan R Biles, Portland, OR (US);
In Focus Systems, Inc., Tualatin, OR (US);
Abstract
A multiple-color filter array (94) useful as part of a flat panel display system of either a projection (50) or direct view (70) type is constructed using reflection holography techniques. The filter array includes multiple-color filter elements (110, 114, 116) that reflect wavelengths of light corresponding to colors outside of a color band of interest. Redundant sets of first, second, and third wavelengths selective reflective color filter elements are arranged in stripes to transmit light of the three primary colors red, green, and blue. The three-color filter array is constructed in a single layer (122) of holographic recording material during one sequence of three separate exposures, one for each color filter element. A preferred flat panel display system (200) includes a liquid crystal variable optical retarder of the supertwisted nematic (STN) type. The direct view system includes a spurious light reflection absorber (204), one of whose optical components is selected in association with the residual retardation compensator plate (214) of the preferred liquid crystal variable optical retarder.