Automotive headlamp
An automotive headlamp includes: a light source; a movable shade configured to be movable between a first position shielding a part of light emitted from the light source and a second position having a different light shielding volume; a motor configured to generate a driving force to move the shade from the first position to the second position; and a stopper for high beam to fix the movable shade, which has been moved from the first position to the second position, at the second position. The motor is configured such that a motor phase is lag when the motor moves the movable shade to the second position by the driving force generated by supplied power and fixes the same, and an electric current is applied to the motor when the movable shade is fixed at the second position.
1. An automotive headlamp comprising:
a light source;
a shade configured to be movable between a first position shielding a first volume of light emitted from the light source and a second position shielding a second volume of light different from the first volume;
a motor configured to generate a driving force to move the shade from the first position to the second position;
a fixing part configured to fix the shade, which is moved from the first position to the second position; wherein the motor has rotor poles, a motor shaft and a commutator, the commutator is fixed to the motor shaft, a rectification phase of the motor is lag, and an electric current is applied to the motor when the shade is fixed at the second position.
2. The automotive headlamp according to claim 1 , further comprising:
an elastic member configured to generate a bias force for pushing back the shade from the second position to the first position, wherein
the motor is configured to generate the driving force to move the shade to the second position against the bias force generated by the elastic member.