Shared light pipe for message indicator and light sensor

Details Shared light pipe for message indicator and light sensor Shared light pipe for message indicator and light sensor

H - Electricity

04

B

H04B 10/12 (2006.01) F21V 8/00 (2006.01) G02B 6/10 (2006.01) G02F 1/13357 (2006.01) G08B 5/38 (2006.01) H04W 88/02 (2009.01) G06F 15/02 (2006.01)

Patent

CA 2742636

A shared light pipe is set forth for transmitting light generated by a message waiting LED in a mobile communication device, in one direction, and transmitting ambient or surrounding light, in an opposite direction, to a light sensor for controlling a display backlight of the device. The light pipe includes an elongated first portion having a first end for receiving and transmitting light and external surfaces for reflecting light there through via total internal reflection (TIR), a second portion coextensive with the first portion for outputting light received at the first end and reflected through the first portion, and a second branch coextensive with the first portion for receiving and transmitting light for output at the first end.

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