| 20080310187 | LIGHT GUIDE DEVICE FOR VEHICLE LAMPS - A light guide device has a body and multiple grooves. The body has a radiation surface and a flat surface formed oppositely to the radiation surface. The grooves are formed inward from the flat surface into the body, and each groove is cambered, is separated from adjacent grooves with intervals and has a curvature. The grooves in a center segment of the body have the same curvature larger than the curvatures of other grooves. When light beams emit to the grooves, the light beams are refracted toward and outward the radiation surface by the grooves. Larger curvature of the groove results in smaller scatter angle of the light beams refracted by the groove. The refracted light beams having smaller scatter angle result in higher illumination. | 12-18-2008 |
