Display device and method for controlling display device
AssigneeSamsung Electronics Co., Ltd.
InventorsMoonyoung Kim, Jeongil Kang
Life of this patent
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Abstract
A display device includes a diode bridge configured to rectify input power; a power factor correction (PFC) circuit configured to control a power factor of the input power rectified by the diode bridge; a direct current (DC)/DC converter configured to change voltage of the input power received through the PFC circuit; and a PFC controller connected to the diode bridge and configured to selectively turn on or off the PFC circuit based on terminal voltages of lower diodes included in the diode bridge.
Claims16
A display device comprising:
- a diode bridge configured to rectify input power;
- a power factor correction (PFC) circuit configured to control a power factor of the input power rectified by the diode bridge;
- a direct current (DC)/DC converter configured to change voltage of the input power received through the PFC circuit;
- and
- a PFC controller connected to the diode bridge and configured to selectively turn on or off the PFC circuit based on terminal voltages of diodes included in the diode bridge,
- wherein the PFC controller is further configured to:
- identify that the input power is alternating current (AC) power based on a change in the terminal voltages of the diodes included in the diode bridge, and
- identify that the input power is DC power in response to no change in the terminal voltages of the diodes included in the diode bridge.
A method of controlling a display device including a diode bridge and a power factor correction (PFC) circuit for controlling a power factor of input power rectified by the diode bridge, the method comprising:
- rectifying, by the diode bridge, the input power;
- identifying a type of the input power rectified by the diode bridge;
- and
- controlling the PFC circuit to be selectively turned on or off based on the type of the input power,
- wherein identifying the type of the input power rectified by the diode bridge comprises:
- identifying that the input power is alternating current (AC) power based on a change in terminal voltages of diodes included in the diode bridge, and
- identifying that the input power is DC power in response to no change in the terminal voltages of the diodes included in the diode bridge.
Dependencies are inferred from the claim text.