Daimlerchrysler Corporation

Chrysler Group LLC

Philip Chamberlain

John M Gaynier

Brian R Merrill

An optical communication system is disclosed. The optical communication system includes a reflection hub connected to a plurality of communication modules. The communication modules communicate optical signals to one another via two way light channels, such that an optical signal is scattered off a diffuse surface at a distal end of the reflection hub and into the two way light channel of each communication module.

Optical communication system

An automotive external lighting system uses pulse width modulation to drive a single filament for turn signaling and park signaling purposes. A control circuit generates a variable brightness signal based on a predetermined brightness level, and an external lamp produces external illumination based on the brightness signal. A single wire is therefore able to electrically connect the control circuit to the external lamp. The control circuit includes a microcontroller for generating a pulse width modulated signal, and a high side driver for driving the lamp in response to the pulse width modulated signal. When the pulse width modulated signal has a duty cycle corresponding to a parking brightness level, the filament will produce less illumination than in the case of turn signaling. When the pulse width modulated signal has a duty cycle corresponding to a turning brightness level, the control circuit generates a switching signal in response to an operator manipulation, and the microcontroller controls generation of the pulse width modulated signal in response to the switching signal.

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Otter Lake, MI, United States of America

Philip Chamberlain