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:
Sep. 22, 1992
Filed:
Mar. 04, 1991
James H Vogeley, Yorktown, VA (US);
Patrick H Newton, Hampton, VA (US);
nView Corporation, Newport News, VA (US);
Abstract
The projection system includes a light source, a lens for focussing the light rays, an active matrix LCD panel disposed and spaced between a pair of glass panels and a lens and mirror system for projecting the LCD image onto an enlarged surface. To minimize, eliminate or attenuate ghosting of the images caused by secondary reflections from the upper glass panel back onto the LCD, the undersurface of the upper glass panel is coated with a high-efficient, anti-reflecting material, such as including magnesium fluoride, whereby high-contrast ratio images are maintained and not degraded by secondary reflections in the optical system.