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Arrangement in vehicle headlamps
| Details |
Inventors: Fast, Peder; Rosengren, Lars-Goran;
Assignee: Ultralux AB (Gothenburg, SE)
Primary Examiner: Dority; Carroll B.
Assistant Examiner:
Attorney, Agent or Firm: Nies, Kurz, Bergert & Tamburro
An arrangement in vehicle headlamps which are intended to emit a significant proportion of ultraviolet light. The invention is characterized by a control circuit (1) for adjusting, via means (3; 5, 9, 10), the intensity of the ulraviolet light emitted by the headlamp (6); vehicle speed sensing means (2) intended to deliver to the control circuit (1) an electric signal corresponding to prevailing vehicle speed; and further characterized in that the control circuit (1) is constructed to decrease said intensity to a predetermined, lower level when the speed lies beneath a predetermined value, and to increase the intensity to a predetermined, higher level when the speed lies above a predetermined value. |
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DETAILED DESCRIPTION We claim: 1.
An arrangement in the headlamps of automotive vehicles intended to emit a significant proportion of ultraviolet light, characterized by a control circuit (1) for adjusting, via means (3; 5, 9, 10), the intensity of the ultraviolet light emitted by the headlamp (6); vehicle speed sensing means (2) intended to deliver to the control circuit (1) an electric signal corresponding to prevailing vehicle speed; and further characterized in that the control circuit (1) is constructed to decrease said intensity to a predetermined, lower level when the speed lies beneath a predetermined value, and to increase the intensity to a predetermined, higher level when the speed lies above a predetermined value.
2.
An arrangement according to claim 1, characterized in that the control circuit (1) includes a time delay circuit (12) or corresponding means, so constructed that the control circuit (1) will respectively increase and decrease said intensity when the vehicle speed has remained beneath and above said predetermined speeds respectively for a given predetermined length of time.
3.
An arrangement according to claim 1, characterized in that the control circuit (1) is intended to decrease the intensity of the light source (4) gradually with respect to vehicle speed, when said speed lies beneath a given predetermined value.
4.
An arrangement according to claim 1, characterized in that the control circuit (1) is intended to increase the intensity of the light source (4) gradually when the vehicle speed lies above a given predetermined value.
5.
An arrangement according to claim 1, characterized in that the control circuit (1) is intended to extinguish the light source (4) when the vehicle speed lies beneath a given predetermined value and to ignite the light source (4) when the vehicle speed lies above a given predetermined value.
6.
An arrangement according to claim 1, characterized in that the predetermined speeds at which said intensities are changed are the same, irrespective of whether the vehicle speed has been increased or decreased
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