| US 7,530,712 B2 | ||
| Reflective illumination device | ||
| Jian-Shian Lin, Yilan (Taiwan); Jian-Chiuan Wang, Xindian (Taiwan); Chieh-Lung Lai, Taiping (Taiwan); Hsiu-Chen Hsu, Tainan (Taiwan); and Yi-Ting Sun, Taipei (Taiwan) | ||
| Assigned to Industrial Technology Research Institute, Hsinchu (Taiwan); and Toalux Electric Corp., Changhua (Taiwan) | ||
| Filed on Jul. 21, 2006, as Appl. No. 11/490,175. | ||
| Claims priority of application No. 95109114 A (TW), filed on Mar. 17, 2006; and application No. 95120911 A (TW), filed on Jun. 13, 2006. | ||
| Prior Publication US 2007/0217193 A1, Sep. 20, 2007 | ||
| Int. Cl. F21V 7/00 (2006.01) | ||
| U.S. Cl. 362—247 [362/327; 362/346] | 14 Claims |
| 1. A reflective illumination device comprising:
a light-guiding screen having a bottom and at least a light-discharging exit formed by an enclosure of a side wall, the bottom
having at least one plain surface located in an interior of the light-guiding screen; and
at least one directional light source, each directional light source being arranged at the side wall;
wherein, a reflecting surface having at least a semi-Fresnel lens structure is arranged on the at least one plain surface
located on the bottom of the light-guiding screen, the semi-Fresnel lens reflecting light beams emitting from each light source
out of the light-discharging exit at specific angles corresponding to the direction of each light beam directed onto the semi-Fresnel
lens structure, the at least one plain surface includes two plain surfaces, the profile of the reflecting surface is a formation
of the two plain surfaces being symmetrically arranged with respect to an axis while the semi-Fresnel lens structures are
respectively formed on the two plain surfaces.
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