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. 12, 2009
Filed:
Jul. 21, 2006
Jian-shian Lin, Yilan, TW;
Jian-chiuan Wang, Xindian, TW;
Chieh-lung Lai, Taiping, TW;
Hsiu-chen Hsu, Tainan, TW;
Yi-ting Sun, Taipei, TW;
Jian-Shian Lin, Yilan, TW;
Jian-Chiuan Wang, Xindian, TW;
Chieh-Lung Lai, Taiping, TW;
Hsiu-Chen Hsu, Tainan, TW;
Yi-Ting Sun, Taipei, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Toalux Electric Corp., Changhua, TW;
Abstract
A reflective illumination device is disclosed, which is comprised of a light-guiding screen with light reflecting ability and at least a directional light source; wherein the light-guiding screen includes a reflecting surface having a semi-Fresnel lens structure arranged thereon. The semi-Fresnel lens structure, being designed basing on the principle of Fresnel lens, is the equivalent of a parabolic mirror that has spiral cut ridges for focusing light to a focal point, whereas the profile of the ridges can be a planar surface, a curved surface or the combination thereof. By arranging the reflecting surface with semi-Fresnel lens structure at the bottom of the light-guiding screen and each light source at a circumferential side wall of the light-guiding screen, the light beams emitting from each light source can be reflected out of the light-guiding screen by a specific angle as the direction of the light beams is adjusted to pour on the semi-Fresnel lens structure by a specific angle matching the configuration of the same.