Head lamp switch with twilight sentinel control
First Claim
1. A system for controlling the turning on of vehicle headlamps of a vehicle having a dome light which provides a variable dome light intensity, said system comprising:
- a sensor for sensing the intensity of ambient light and providing a first signal indicative of the intensity of the ambient light;
a memory for storing a light value corresponding to the intensity of the dome light;
a comparator for receiving said first signal and for comparing the intensity of the ambient light with said stored light value, said comparator providing an output second signal when said first signal is at or below said stored light value; and
a circuit for turning on the vehicle headlamps when said circuit receives said output second signal.
2 Assignments
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Accused Products
Abstract
A system for controlling the turning on of vehicle headlamps 703 of a vehicle having a dome light 50 which provides a variable dome light intensity includes a sensor 40, a memory 820, a comparator 810, and a circuit 18. The sensor 40 senses the intensity of ambient light and provides a first signal α indicative of the intensity of the ambient light. The memory 820 stores a light value σ corresponding to the intensity of the dome light 50. The comparator 810 receives the first signal α a and compares the intensity of the ambient light with the stored light value σ. The comparator 810 provides an output second signal β when the first signal is at or below the stored light value σ. The circuit 18 turns on the vehicle headlamps 703 when the circuit 18 receives the output second signal β.
22 Citations
6 Claims
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1. A system for controlling the turning on of vehicle headlamps of a vehicle having a dome light which provides a variable dome light intensity, said system comprising:
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a sensor for sensing the intensity of ambient light and providing a first signal indicative of the intensity of the ambient light;
a memory for storing a light value corresponding to the intensity of the dome light;
a comparator for receiving said first signal and for comparing the intensity of the ambient light with said stored light value, said comparator providing an output second signal when said first signal is at or below said stored light value; and
a circuit for turning on the vehicle headlamps when said circuit receives said output second signal. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification