| US 7,600,909 B2 | ||
| Spread illuminating apparatus | ||
| Yasuo Ohno, Kitasaku-gun (Japan) | ||
| Assigned to Minebea Co., Ltd., Kitasaku (Japan) | ||
| Filed on Aug. 23, 2007, as Appl. No. 11/892,542. | ||
| Claims priority of application No. 2006-275347 (JP), filed on Oct. 06, 2006. | ||
| Prior Publication US 2008/0084710 A1, Apr. 10, 2008 | ||
| Int. Cl. F21V 7/04 (2006.01) | ||
| U.S. Cl. 362—633 [362/608; 362/612; 362/621; 349/60] | 8 Claims |
| 1. A spread illuminating apparatus comprising:
a point light source;
a light conductor plate having a prism array formed at a side surface thereof at which the point light source is disposed;
a frame to house the point light source and the light conductor plate, the frame including an elastically active area to urge
the light conductor plate toward the point light source; and
a heat-resistant transparent spacer disposed between the point light source and the prism array of the light conductor plate,
the heat-resistant transparent spacer comprising an elastic layer disposed in contact with the point light source, and a non-elastic
layer disposed in contact with the prism array of the light conductor plate.
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