Control system for vehicular illumination
First Claim
Patent Images
1. A control system for vehicular illumination, comprising:
- a first detector detecting a circumferential illumination intensity of a vehicle;
a second detector detecting a travel time of the vehicle;
a third detector detecting a travel distance of the vehicle associated with the travel time; and
a controller operative in an automatic mode thereof to turn a head lamp of the vehicle on and off depending on the circumferential illumination intensity, the travel time, and the travel distance, whereinthe controller has preset values for the automatic mode including a first time, a first distance, a first illuminance, and a second illuminance lower than the first illuminance,the controller turns the head lamp off when the travel time exceeds the first time if the circumferential illumination intensity is kept equal to or higher than the first illuminance for the travel time exceeding the first time, andthe controller turns the head lamp on when the travel distance exceeds the first distance if the circumferential illumination intensity is kept equal to or higher than the second illuminance for the travel distance exceeding the first distance.
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Abstract
A head lamp (3) is turned off when a first set time (T1) has lapsed in a state that a circumferential illumination intensity (B) is equal to or higher than a first level (B1), or when the vehicle has run a first set distance (L1) in a state that the circumferential illumination intensity (B) is equal to or higher than a second level (B2) lower than the first level (B1). Accordingly, even if the vehicle is stopped immediately after a moving to a bright place from a dark place, or even if the peripheral environment has become bright during a stop in the dark place, the head lamp (3) can be securely turned off.
12 Citations
10 Claims
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1. A control system for vehicular illumination, comprising:
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a first detector detecting a circumferential illumination intensity of a vehicle; a second detector detecting a travel time of the vehicle; a third detector detecting a travel distance of the vehicle associated with the travel time; and a controller operative in an automatic mode thereof to turn a head lamp of the vehicle on and off depending on the circumferential illumination intensity, the travel time, and the travel distance, wherein the controller has preset values for the automatic mode including a first time, a first distance, a first illuminance, and a second illuminance lower than the first illuminance, the controller turns the head lamp off when the travel time exceeds the first time if the circumferential illumination intensity is kept equal to or higher than the first illuminance for the travel time exceeding the first time, and the controller turns the head lamp on when the travel distance exceeds the first distance if the circumferential illumination intensity is kept equal to or higher than the second illuminance for the travel distance exceeding the first distance. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicular illumination system comprising:
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a head lamp at a front of a vehicle; a first data source responsible for an external illumination intensity of the vehicle to provide a first data representing the illumination intensity; a second data source responsible for a travel time of the vehicle to provide a second data representing the travel time; a third data source responsible for a travel distance associated with the travel time of the vehicle to provide a third data representing the travel distance; and a controller recognizing a field defined, for illumination control of the vehicle, by a first parameter representative of the illumination intensity, a second parameter representative of the travel time, and a third parameter representative of the travel distance, and a first region preset in the field by a first set of parameter values including a first illuminance as a value of the first parameter, and one of a first time as a value of the second parameter, and a first distance as a value of the third parameter, and a second set of parameter values including a second illuminance as a value of the first parameter smaller than the first illuminance, and the other of the first time and the first distance, the controller being responsible for a given set of the first, second, and third data to control the head lamp to be lit when a corresponding point to the given set of data resides in the first region. - View Dependent Claims (8, 9, 10)
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Specification