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:
May. 03, 2011
Filed:
Jul. 28, 2008
Munisamy Anandan, Del Valle, TX (US);
Munisamy Anandan, Del Valle, TX (US);
Other;
Abstract
A ultra-violet based color pixel backlight system for Liquid Crystal Display, that does not contain the traditional color filters, comprising multiplicity of LEDs, emitting UV light in the wavelength range of 250 nm to 390 nm, assembled at one edge of a UV transmitting light guide, which has other three edges and bottom surface coated with UV reflecting layer and its top surface etched with UV extracting pixel patterns that contain phosphors that emit different colors of light in red, blue and green region when excited by UV light. A sheet of micro-lens is assembled between the light guide and the LCD to have the etched pixels in substantial alignment with the pixels of LCD and the lenses of the sheet of micro-lens. Thus red, blue and green pixels of light from the light guide passes through the intended red, blue and green pixels of LCD that has no traditional color filters, resulting in color pixel backlighting that enhances the optical efficiency of LCD.