JP2008005922A5 - - Google Patents

Claims (3)

  A display device for displaying an image for game effect; and a power supply device for supplying DC power, wherein the display device includes a display unit and a display unit illumination device for illuminating the display unit from the back side. The display unit illumination device is a gaming machine driven by a display unit illumination device drive circuit to which a DC power supplied from the power supply device is input,
  The power supply device receives an AC power supply, supplies a first DC power supply whose voltage is controlled, and a second DC power supply whose voltage is not controlled and whose power supply capacity is larger than the first DC power supply,
  The display unit illumination device drive circuit includes a power conversion circuit, a control circuit, and an operation power supply circuit.
    The power conversion circuit includes a switching circuit, converts a second DC power supplied from the power supply device into an AC power supply, and supplies the AC power to the display unit illumination device.
    The control circuit includes:
      ON / OFF control means for ON / OFF control of the switching circuit using an oscillation signal of a set frequency output from the oscillation circuit;
      When the voltage of the AC power supply supplied from the power conversion circuit becomes smaller than the first lower limit voltage setting value, the voltage drop abnormality process for executing the voltage drop abnormality process for controlling the switching circuit to be turned off and holding the voltage drop abnormality process is performed. Means,
      Reset processing means for executing reset processing at the start of operation by supplying operating power to the control circuit, and releasing holding of the voltage drop abnormality processing by the voltage drop abnormality processing means;
    The operating power supply circuit stops supplying the operating power to the control circuit when the voltage of the second DC power supply supplied from the power supply device is smaller than a second lower limit voltage setting value, and supplies the operating power supply from the power supply device. Supplying an operating power to the control circuit when the voltage of the second DC power supply is greater than the second lower limit voltage setting value;
  The second lower limit voltage set value is set so that the operation power supply circuit stops supplying operation power to the control circuit after the voltage drop abnormality processing means executes the voltage drop abnormality processing.
A gaming machine characterized by that.   The gaming machine according to claim 1,
  The operating power supply circuit is
    A voltage conversion circuit for converting the second DC power supplied from the power supply device into an operating power supply having a voltage corresponding to the operating voltage of the control circuit;
    When the voltage of the second DC power supply supplied from the power supply device is smaller than the second lower limit voltage set value, the supply of operating power from the voltage conversion circuit to the control circuit is cut off and supplied from the power supply device. And an operation power supply cutoff circuit that permits supply of operation power from the voltage conversion circuit to the control circuit when the voltage of the second DC power supply is greater than the second lower limit voltage set value.
A gaming machine characterized by that.   3. The gaming machine according to claim 1, wherein the on / off control means turns on the switching circuit based on an oscillation signal having a set frequency output from the oscillation circuit and a current of the display unit illumination device. -A gaming machine characterized by off-control.