| US 7,482,574 B2 | ||
| Light guide having an elongate shape with dual concave shaped end and electronic device using light guide | ||
| Dongxue Wang, Palatine, Ill. (US) | ||
| Assigned to Motorola, Inc., Schaumburg, Ill. (US) | ||
| Filed on Jun. 29, 2007, as Appl. No. 11/771,008. | ||
| Prior Publication US 2009/0001250 A1, Jan. 01, 2009 | ||
| Int. Cl. G01J 1/04 (2006.01) | ||
| U.S. Cl. 250—227.11 [250/214 AL] | 20 Claims |
| 1. A light guide comprising:
a structure of light-transmitting material having an elongate shape;
the elongate shape including a first end for receiving ambient light and a second end for coupling ambient light to a light
sensor;
the first end having a concave shape; and
the second end having a concave shape.
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