DISPLAY DEVICE

摘要

A display device includes: a stepping motor; a concave mirror that moves in accordance with the operation of the stepping motor, the concave mirror reflecting display light emitted from a display unit toward the windshield; a lever part that moves together with the concave mirror; a drive unit for driving the stepping motor by a microstep drive system; a control unit for controlling the movement of the concave mirror by controlling the drive unit; and a stopper unit provided within the range of movement of the lever part. The drive unit is configured to detect the counter-electromotive force generated by the stepping motor when the lever part comes into contact with the stopper unit. The control unit determines the reference position when the movement of the concave mirror is controlled in accordance with the counter-electromotive force detected by the drive unit.

主权项

1. A display device for projecting display light emitted from a display unit onto a light transmitting member to display a virtual image of an image formed by the display light, comprising:
a stepping motor; a reflector for reflecting the display light emitted by the display unit toward the light transmitting member, the reflector moving in accordance with operation of the stepping motor; a moving part moving together with the reflector; drive means for driving the stepping motor with a microstep drive system; control means for controlling the drive means to control movement of the reflector; and a stopper unit provided within a range of movement of the moving part, wherein: the drive means has a function of detecting counter-electromotive power that is generated in the stepping motor when the moving part abuts against the stopper unit; and when the drive means detects the counter-electromotive power, the control means determines a reference position for controlling movement of the reflector.