| US 7,513,631 B2 | ||
| Lighting device | ||
| Hiroshi Ueno, Aichi (Japan); and Kouichi Itoigawa, Aichi (Japan) | ||
| Assigned to Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi (Japan) | ||
| Filed on Aug. 24, 2007, as Appl. No. 11/844,457. | ||
| Claims priority of application No. 2006-234312 (JP), filed on Aug. 30, 2006. | ||
| Prior Publication US 2008/0055882 A1, Mar. 06, 2008 | ||
| Int. Cl. G01D 11/28 (2006.01) | ||
| U.S. Cl. 362—30 [362/26; 362/23] | 9 Claims |
| 1. A lighting device comprising:
a cover panel including a plurality of illumination windows;
a light source arranged in the cover panel at a location corresponding to a first one of the illumination windows to emit
light in a first direction;
a plate-shaped light guide arranged between the cover panel and the light source along a plane perpendicular to the first
direction;
a first reflection structure formed on the light guide at a location corresponding to the light source, with the first reflection
structure emitting part of the light from the light source toward the first illumination window and diffusing and reflecting
the remaining light to guide the remaining light into the light guide; and
a second reflection structure formed on the light guide at a location spaced from the location corresponding to the light
source and corresponding to a remote one of the illumination windows excluding the first illumination window to reflect the
light guided into the light guide toward the remote illumination window.
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