发明名称 |
Light source device and vehicle lighting device |
摘要 |
An LED light source device can have a simple configuration which can easily create a desired light distribution pattern with a low profile and light weight. An illumination apparatus and a vehicle lighting device can also be configured to use the LED light source device. The light source device can include a light guide plate made of a flat plate-like material that is transparent in the visible range, and which has a front surface serving as a light emission surface. A point light source can be opposed to an end surface of the light guide plate. A rear surface of the light guide plate can include a luminance control element configured to control a luminance distribution on the light emission surface. The luminance control element controls light from the light source, incident through the end surface of the light guide plate, so that a reduced inversion of a light distribution pattern that is to be emitted is formed on the light emission surface as the luminance distribution. The light guide plate can include a polarizing film for making the light emission surface emit p-polarized (parallel polarized) light.
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申请公布号 |
US7806538(B2) |
申请公布日期 |
2010.10.05 |
申请号 |
US20080127176 |
申请日期 |
2008.05.27 |
申请人 |
STANLEY ELECTRIC CO., LTD. |
发明人 |
AJIKI SHUICHI;MASUYAMA KOICHI;SONE NAOYA;KONISHI SADAYUKI;TOKO YASUO |
分类号 |
F21V33/00;F21V5/00;H01L33/58;H01L33/62 |
主分类号 |
F21V33/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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