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US 7,679,354 B2Granted
Phase detecting device, phase control device including the phase detecting device, and fuser control device including the phase control device
AssigneeSamsung Electronics Co., Ltd.
InventorBong-su Shin
Life of this patent
Estimating the term…
Abstract
A phase detecting device includes a power input unit that receives an AC voltage; a phase detector that detects zero-crossing points of the AC voltage, and outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected; and a power switch that selectively cuts off a flow of AC into the power input unit in response to a mode control signal.
Claims31
A phase detecting device comprising:
- a power input unit that receives an AC voltage;
- a phase detector that detects zero-crossing points of the AC voltage, and outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected;
- and
- a power switch that selectively cuts off a flow of AC power into the power input unit in response to a mode control signal;
- wherein the phase detector does not detect the zero-crossing points of the AC voltage when the power switch cuts off the flow of the AC power into the power input unit in response to the mode control signal.
2 more elements
A phase detecting device comprising:
- a power input unit that receives an AC voltage;
- a phase detector that detects zero-crossing points of the AC voltage, and outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected;
- and
- a power switch that selectively cuts off a flow of AC power into the power input unit in response to a mode control signal;
- wherein the mode control signal comprises:
- a standby mode control signal that controls the power switch to operate in a standby mode in which a power consumption of the power input unit is reduced by cutting off the flow of the AC power into the power input unit, and the phase detecting signal is not outputted from the phase detector;
- and
- a normal mode control signal that controls the power switch to operate in a normal mode in which the AC power flows into the power input unit, and the phase detecting signal is outputted from the phase detector when the zero-crossing points of the AC voltage are detected.
5 more elements
A phase detecting device comprising:
- a power input unit that receives an AC voltage;
- a phase detector that detects zero-crossing points of the AC voltage, and outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected;
- and
- a power switch that selectively cuts off a flow of AC power into the power input unit in accordance with whether the power switch is operating in a normal mode or a standby mode;
- wherein the power switch cuts off the flow of the AC power into the power input unit when the power switch is operating in the standby mode;
- and
- wherein the phase detector does not detect the zero-crossing points of the AC voltage when the power switch cuts off the flow of the AC power into the power input unit when the power switch is operating in the standby mode.
4 more elements
A phase detecting device comprising:
- a power input unit that receives an AC voltage;
- a phase detector that detects zero-crossing points of the AC voltage, and outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected;
- and
- a power switch that selectively cuts off a flow of AC power into the power input unit in accordance with whether the power switch is operating in a normal mode or a standby mode;
- wherein the standby mode is a mode in which the power switch cuts off the flow of the AC power into to the power input unit to reduce a power consumption of the power input unit, and the phase detecting signal is not outputted from the phase detector;
- and
- wherein the normal mode is a mode in which the power switch allows the AC power to flow into the power input unit, and the phase detecting signal is outputted from the phase detector when the zero-crossing points of the AC voltage are detected.
4 more elements
A phase control device that controls a phase of an AC power supplied to a controlled device, the phase control device comprising:
- a phase detecting device that receives an AC voltage, detects zero-crossing points of the AC voltage, outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected, and selectively cuts off a flow of AC power into the phase detecting device in response to a mode control signal;
- and
- a signal generator that generates a phase control signal to control the phase of the AC power supplied to the controlled device based on the phase detecting signal;
- wherein the phase detecting device does not detect the zero-crossing points of the AC voltage when the phase detecting device cuts off the flow of the AC power into the phase detecting device in response to the mode control signal.
1 more element
A phase control device that controls a phase of an AC power supplied to a controlled device, the phase control device comprising:
- a phase detecting device that receives an AC voltage, detects zero-crossing points of the AC voltage, outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected, and selectively cuts off a flow of AC power into the phase detecting device in response to a mode control signal;
- and
- a signal generator that generates a phase control signal to control the phase of the AC power supplied to the controlled device based on the phase detecting signal;
- wherein the phase detecting device comprises:
- a power input unit that receives the AC voltage;
- a phase detector that detects the zero-crossing points of the AC voltage, and outputs the phase detecting signal when the zero-crossing points of the AC voltage are detected;
- and
- a power switch that selectively cuts off the flow of the AC power into the power input unit in response to the mode control signal;
- and
- wherein the mode control signal comprises:
- a standby mode control signal that controls the power switch to operate in a standby mode in which a power consumption of the power input unit is reduced by cutting off the flow of the AC power into the power input unit, and the phase detecting signal is not outputted from the phase detector;
- and
- a normal mode control signal that controls the power switch to operate in a normal mode in which the AC power flows into the power input unit, and the phase detecting signal is outputted from the phase detector when the zero-crossing points of the AC voltage are detected.
10 more elements
A phase detecting device comprising:
- a power input unit comprising a first terminal and a second terminal;
- a phase detector comprising a first terminal and a second terminal, the first terminal of the phase detector being connected to the first terminal of the power input unit;
- and
- a power switch comprising a first terminal and a second terminal, the first terminal of the power switch being connected to the second terminal of the phase detector, and the second terminal of the power switch being connected to the second terminal of the power input unit;
- wherein the power input unit receives an AC voltage, generates an output voltage from the AC voltage, and outputs the output voltage across the first terminal of the power input unit and the second terminal of the power input unit;
- wherein the power switch is operable in a normal mode in which the first terminal of the power switch is connected to the second terminal of the power switch, and a standby mode in which the first terminal of the power switch is disconnected from the second terminal of the power switch;
- wherein when the power switch operates in the normal mode, the output voltage across the first terminal of the power input unit and the second terminal of the power input unit produces a current that flows out of the first terminal of the power input unit, through the phase detector via the first terminal of the phase detector and the second terminal of the phase detector, through the power switch via the first terminal of the power switch and the second terminal of the power switch, and into the second terminal of the power input unit, thereby causing the power input unit to consume power in the normal mode;
- wherein when the power switch operates in the standby mode, no current flows out of the first terminal of the power input unit, through the phase detector via the first terminal of the phase detector and the second terminal of the phase detector, through the power switch via the first terminal of the power switch and the second terminal of the power switch, and into the second terminal of the power input unit, so that the power input unit does not consume power in the standby mode;
- wherein when the power switch operates in the normal mode, the phase detector detects zero-crossing points of the AC voltage based on the current flowing through the phase detector, and outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected;
- and
- wherein when the power switch operates in the standby mode, the phase detector does not detect the zero-crossing points of the AC voltage, and does not output the phase detecting signal.
8 more elements
Dependencies are inferred from the claim text.