Provided is a light guide device that can provide transmission illumination with uniform brightness irrespective of distance from an entry portion. Light emitted from a light source (24, 25) enters via an entry portion (22, 23) of a light guide portion (light guide material)(20) formed of a light transmitting material along an outer edge portion (30r) of a decorative portion (30), and advances while being repeatedly totally reflected by inner surfaces of the light guide portion (20). In a light guiding portion (26), the light is guided from the inside of the light guide portion (20) into the decorative portion (30), which is made of a light transmitting material. The light is further scattered inside the decorative portion (30) and discharged outside, while in a non-light guiding portion (28), the light advancing inside the light guide portion (20) is not permitted to advance into the decorative portion (30).
Light guide device
2015-06-17
Patent
Electronic Resource
English
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / G09F DISPLAYING , Anzeigewesen |
European Patent Office | 2016
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