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. 05, 2009
Filed:
Oct. 22, 2004
Jhy-chain Lin, Tu-Cheng, TW;
Jhy-Chain Lin, Tu-Cheng, TW;
Hon Hai Precision Industry Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
A light guide plate () has a light incidence surface () for receiving light, a light emitting surface () for emitting light, and a bottom surface (). The bottom surface has a plurality of diffusion elements () arranged thereat. Each diffusion element defines a diffraction grating unit () therein. A grating direction of each diffraction grating unit is substantially perpendicular to a main direction of light beams received by the diffraction grating unit. Areas of the diffraction grating units progressively increase with increasing distance away from the light incidence surface. Diffractive capabilities of the diffraction grating units progressively increase with increasing distance away from the light incidence surface. These features improve the overall efficiency of utilization of light, and enable the light emitting surface to output highly uniform light.