07352930 is referenced by 25 patents and cites 17 patents.

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.

Title
Shared light pipe for a message indicator and light sensor
Application Number
11/187867
Publication Number
7352930 (B2)
Application Date
July 25, 2005
Publication Date
April 1, 2008
Inventor
Robert J Lowles
Waterloo
CA
Agent
Perry Currier
Assignee
Research In Motion
CA
IPC
G01J 5/08
G02B 6/42
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