Patent ID: 8120714

Claim:
A flat display device comprising: a display unit having a screen for displaying images; a pedestal part for supporting the display unit; a joint part for connecting the pedestal part with the display unit; a rotation drive mechanism provided to the joint part for rotating the display unit in the horizontal direction; a motor for giving a rotation force to the rotation drive mechanism; a motor driver for driving the motor by supplying an operating voltage to the motor; and an operating voltage control portion for controlling the operating voltage, the operating voltage control portion including an integrator circuit which supplies a bias voltage to the motor driver, wherein the operating voltage changes in accordance with a value of the bias voltage, the motor generates a torque corresponding to the operating voltage, the operating voltage control portion controls the operating voltage by controlling the value of the bias voltage such that, when the driving of the rotation drive mechanism is started, a predetermined DC voltage is supplied to the integrator circuit and thereby the bias voltage is increased gradually so that the torque is increased gradually and, when the driving of the rotation drive mechanism is stopped, a ground voltage is supplied to the integrator circuit and thereby the bias voltage is decreased gradually so that the torque is decreased gradually.