| 摘要 |
PROBLEM TO BE SOLVED: To distribute light from a LED light source in a balanced manner, to let a design light distribution portion emit light in a nice-looking manner with a small quantity of light and to let a functional light distribution portion emit bright light with a sufficient quantity of light. SOLUTION: In a side turn signal lamp 1, the LED light source 8 is mounted to a base end of a light guide lens 3. A distal end of the light guide lens 3 curves toward a rear direction of a vehicle and the functional light distribution portion 11 including light diffusion steps 10 is formed in a curved portion, so that light from the LED light source 8 is diffused toward a side of the vehicle. In the design light distribution portion 12 between the LED light source 8 and the functional light distribution portion 11, a linear optical step 14 is formed on a rear surface of the light guide lens 3 so as to extend in a longitudinal direction of the lens. A plurality of groove portions 15 are carved on the optical step 14. Part of light from the LED light source 8 toward the functional light distribution portion 11 is reflected to a front direction of the vehicle by the optical step 14 and diffused around the groove portions 15, so that a novel light distribution pattern in which linear light emission portions and dot-like light emission portions are mixed is formed. COPYRIGHT: (C)2011,JPO&INPIT |
