VEHICLE HEADLAMP CONTROL APPARATUS, VEHICLE HEADLAMP CONTROL SYSTEM AND VEHICLE HEADLAMP, HIGH INTENSITY DISCHARGE LAMP CONTROL APPARATUS, HIGH INTENSITY DISCHARGE LAMP CONTROL SYSTEM AND VEHICLE HEADLAMP
First Claim
1. A vehicle headlamp control apparatus which:
- receives a direct current voltage;
lights a discharge lamp by a square wave; and
drives at least one motor,wherein the square wave for lighting the discharge lamp and a pulse for driving the motor are synchronized with each other.
2 Assignments
0 Petitions
Accused Products
Abstract
In vehicle headlamp control apparatuses, which receive a direct current voltage Es, light discharge lamps by square waves, and drive motors, in each of which the number is at least one, arithmetic operations are performed for synchronizing the square waves for lighting the discharge lamps and pulses for driving the motors with each other and for driving the motors within a substantially constant time after polarities of the square waves for lighting the discharge lamps are inverted. By using an inexpensive microcomputer, the vehicle headlamp control apparatuses make it possible to realize lighting controls for the discharge lamps and smooth drive controls for headlamps and auxiliary lamps by the motors for varying optical axes thereof.
18 Citations
28 Claims
-
1. A vehicle headlamp control apparatus which:
-
receives a direct current voltage; lights a discharge lamp by a square wave; and drives at least one motor, wherein the square wave for lighting the discharge lamp and a pulse for driving the motor are synchronized with each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A high intensity discharge lamp lighting apparatus which:
-
receives a direct current voltage; and lights a high intensity discharge lamp by a square wave, the high intensity discharge lamp control apparatus comprising; means for performing a drive control for at least one load other than the high intensity discharge lamp, wherein the control for the load is synchronized with the square wave for lighting the high intensity discharge lamp. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
Specification