Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Electric switch controlled by the radiant energy responsive...
Patent
1992-10-30
1994-07-12
Pascal, Robert J.
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Electric switch controlled by the radiant energy responsive...
315 82, H05B 4136, B60Q 114
Patent
active
053292065
ABSTRACT:
An automatic headlamp dimmer system for switching a vehicle's headlamps from high beam to low beam when lights from another vehicle are detected in front of the vehicle. To prevent spurious responses to reflected light from signs and other sources, the dimmer system includes a light detector which is responsive only to infrared light. Also, unwanted responses to flashing lights are avoided by detecting the presence of a periodically varying light signal, and inhibiting switching between high and low beams in response thereto. The system is also capable of sensing the activation of windshield wipers and preventing headlamp switching caused by interruption of light to the system's light sensor by action of the wiper blades.
REFERENCES:
patent: 3818265 (1974-06-01), Hicks et al.
patent: 4599544 (1986-07-01), Martin
patent: 5182502 (1993-01-01), Slotkowski et al.
Ewald Henry J.
Macks Harold R.
Michaels Paul A.
Slotkowski Kenneth G.
Ford Motor Company
Lectron Products, Inc.
Neyzari Ali
Pascal Robert J.
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