Device for nighttime motor vehicle driving assistance
First Claim
1. A device for assisting night driving of a motor vehicle, said motor vehicle comprising at least one lighting device for emitting a light beam in a road scene (S) in front of said motor vehicle, said road scene (S) comprising elements whose apparent brightness is a sum of their intrinsic brightness and a brightness induced by said lighting beam, wherein said at least one lighting device comprises at least one variable-transmission screen (F) for attenuating said intrinsic brightness of objects in said road scene (S);
- wherein said at least one lighting device comprises at least one light source and said at least one variable-transmission screen (F) comprises a transmission coefficient (CT);
wherein said at least one light source and said transmission coefficient (CT) variable are controlled by a common control unit.
1 Assignment
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Accused Products
Abstract
A device for assisting the nighttime driving of a motor vehicle fitted with a lighting device for emitting a beam for illuminating the road scene in front of the vehicle, the illumination emitted by the lighting device being variable periodically between a maximum value and a minimum value, the device including at least one variable-transmission screen placed between the road scene and the driver, the coefficient of transmission of the screen being variable periodically between a maximum value and a minimum value, the switching on of at least one light source of the lighting device and the coefficient of transmission of the variable-transmission screen controlled by the control unit, the illumination reaching its maximum value when the coefficient of transmission of the screen reaches its maximum value. The control unit controls a circuit for regulating the power supply and a transmitter of remote control waves toward a receiver.
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Citations
26 Claims
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1. A device for assisting night driving of a motor vehicle, said motor vehicle comprising at least one lighting device for emitting a light beam in a road scene (S) in front of said motor vehicle, said road scene (S) comprising elements whose apparent brightness is a sum of their intrinsic brightness and a brightness induced by said lighting beam, wherein said at least one lighting device comprises at least one variable-transmission screen (F) for attenuating said intrinsic brightness of objects in said road scene (S);
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wherein said at least one lighting device comprises at least one light source and said at least one variable-transmission screen (F) comprises a transmission coefficient (CT); wherein said at least one light source and said transmission coefficient (CT) variable are controlled by a common control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for providing assistance in nighttime driving of a motor vehicle by providing a driver of said motor vehicle with:
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a view of a road scene as it is illuminated by at least one lighting device of said motor vehicle; and at least one variable transmission screen (F) for attenuating a view of light sources which are present in said road scene and which do not belong to said motor vehicle being controlled by said driver and which might interfere with perception of said road scene without impeding said driver'"'"'s movements or restricting said driver'"'"'s field of view; wherein said at least one lighting device comprises at least one light source and said at least one variable-transmission screen (F) comprises a transmission coefficient (CT); wherein said at least one light source and said transmission coefficient (CT) variable are controlled by a common control unit.
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9. A variable-transmission screen (F) adapted to be placed between a driver of a motor vehicle and a road scene (SR) in front of said vehicle wherein a coefficient of transmission (CT) of said variable-transmission screen (F) is variable according to a pulse width modulation (PWM) mode between a maximum value (CTMAX) and a minimum value (CTmin) of said variable-transmission screen (F);
said variable-transmission screen (F) filtering light rays from active sources so as to attenuate them. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A device for assisting nighttime driving of a motor vehicle having at least one lighting device for emitting a light beam of variable intensity for the illumination of the road scene (S) in front of the vehicle, said device comprising:
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at least one variable-transmission screen (F) placed between the road scene (S) and a driver of the vehicle; a coefficient of transmission (CT) of said at least one variable-transmission screen (F) being variable between a maximum value (CTMAX) and a minimum value (CTmin) and an illumination (E) emitted by said at least one lighting device being variable between a maximum value (EMAX) and a minimum value (Emin); said illumination (E) reaching its maximum value (EMAX) substantially when said coefficient of transmission (CT) of said at least one variable-transmission screen (F) reaches its maximum value (CTMAX). - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification