ILLUMINATION DEVICE AND AUTOMOTIVE LAMP
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United States of America Patent
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Jun 17, 2014
filing date -
Jan 12, 2012
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Abstract
An automotive lamp includes an LED and a light guide. The light guide has the light, emitted from the LED, enter through an incident surface and emits the light frontward from an emission surface by guiding the light inside the light guide. The light guide includes a plurality of steps on a rear face side of the peripheral surface of the light guide. With the plurality of steps, the light traveling inside the light guide is reflected toward the emission surface. The pitch between each of the plurality of steps is set to 0.5 mm or below.
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