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. 15, 2002
Filed:
Aug. 17, 2000
Jih-Yung Lu, San-Chung, TW;
Benq Corporation, Taoyuan, TW;
Abstract
A method of performing a uniform illumination pattern in a back-light plate using sand-blasting process. This method mainly includes two steps. The first step is to perform a manufacturing process, for example a chemical etching process or a laser-cutting process, to form a hole mask on a metal plate with a predetermined hole pattern. The second step is to position the hole mask of the metal plate on one illuminating face of the back-light plate to perform a sandblasting process. A plurality of recesses, each being no deeper than a predetermined depth, are consequently formed to serve as a uniform illumination pattern of the back-light plate. When visible light emits into the back-light plate, the plurality of recesses on the illuminating face make the emitted visible light uniformly illuminated.