Patent ID: 8665382

Claim:
A pivoting display device for use in moving a monitor between stowed and open positions which device comprises: a monitor configured to pivot around a shaft supported by bearings fixed to a frame of the stowing location; a monitor pivoting device including a forward/reverse rotatable motor that can drive the said monitor in a first closing direction and in a second opening direction, and a transmission mechanism that conveys a rotating force of the motor to the monitor; an electromagnetic brake that is configured to be activated at each position in the stowed state and the opened state of the monitor to maintain these states but deactivated when the monitor is in the process of being moved between its open and stowed positions; a power unit that drives the said monitor and also drives the said motor and the said electromagnetic brake; a controller that controls the pivoting of the said monitor about said shaft; the said power unit being a power circuit that outputs the prescribed DC voltage, comprising a rectifier circuit that transforms an input AC voltage to a DC voltage, a step-up circuit that steps up the transformed DC voltage, and a voltage regulator that adjusts the stepped up DC voltage; wherein said power unit is further provided with a retraction power retention circuit that stores the said stepped up DC current in the capacitor while the source voltage is supplied and that supplies the power stored in capacitors to the voltage regulator of the said power circuit when there is no source voltage available; and wherein the said controller, when under a power failure condition where no source voltage is detected and detecting that the monitor is in its opened state, deactivates the electromagnetic brake and reverse rotating the motor to drive the monitor to its stowed state using the power stored in the retraction power retention circuit.