Device for controlling the angle of the optical axis of a headla

Details Device for controlling the angle of the optical axis of a headla Device for controlling the angle of the optical axis of a headla

1993-04-08

1995-05-09

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

362 66, 307 108, B60Q 1076

Patent

active

054143357

ABSTRACT:
A device for controlling the angle of an optical axis of a headlamp which is advantageous in which the device is compact, light-weight and relatively inexpensive to manufacture and in which accurate optical axis angle control that corresponds to the operation of the operation switch can be achieved at all times regardless of the number of optical axis angle controllers used.
The device comprises: an operation switch which includes a potentiometer for setting a control voltage, a motor which variably controls the angle of the optical axis of the headlamp based upon the control voltage generated by the operation switch, an optical axis angle voltage generator that includes a potentiometer for generating an optical axis angle voltage of the headlamp which is variably controlled by the motor, and a comparative controller which compares the optical axis angle voltage with the control voltage and then causes the motor to rotate in a direction in which the difference between the two voltages disappears. The optical axis angle voltage generator further includes a voltage setting resistance R connected in series to a power supply, and the potentiometer of this voltage generator is in a parallel connection with the potentiometer of the operation switch.

REFERENCES:
patent: 4574334 (1986-03-01), Igura
patent: 4737656 (1988-04-01), Gottlieb
patent: 5010457 (1991-04-01), Ohmamyuda et al.

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