Image forming apparatus that performs AC-DC and DC-DC voltage conversions, and having a power supply that reduces power consumption in low consumption power mode
AssigneeCanon Kabushiki Kaisha
InventorsYuya Hirano, Junya Kobayashi, Masamitsu Watahiki
Life of this patent
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Abstract
The power supply is capable of operating in a first state and a second state having a consumption power lower than a consumption power of the first state. The power supply controls a first power supply in the first state such that a first DC voltage is a first voltage and controls the first power supply in the second state such that the first DC voltage is a second voltage lower than the first voltage.
Claims19
A power supply capable of operating in a first state and a second state having a consumption power lower than a consumption power of the first state, the power supply comprising:
- a first power supply configured to convert AC voltage into a first DC voltage and output the first DC voltage;
- a second power supply configured to convert the first DC voltage into a second DC voltage lower than the first DC voltage in the first state output the second DC voltage to a predetermined load, wherein the second power supply is configured to stop operation in the second state;
- a third power supply configured to convert the first DC voltage into a third DC voltage lower than or equal to the first DC voltage in the second state and output the third DC voltage to the predetermined load, wherein the third power supply is configured to stop operation in the first state;
- and
- a first control unit configured to control the first power supply so that the first DC voltage reaches a first voltage value in the first state, and control the first power supply so that the first DC voltage reaches a second voltage value lower than the first voltage value in the second state.
An image forming apparatus including a power supply and an image forming unit configured to form an image on a recording material, the image forming apparatus configured to receive power supplied from the power supply,
- the power supply being capable of operating in a first state and a second state having a consumption power lower than a consumption power of the first state, the power supply comprising:
- a first power supply configured to convert AC voltage into a first DC voltage and output the first DC voltage;
- a second power supply configured to convert the first DC voltage into a second DC voltage lower than the first DC voltage in the first state and output the second DC voltage to a predetermined load, wherein the second power supply is configured to stop operation in the second state;
- a third power supply configured to convert the first DC voltage into a third DC voltage lower than or equal to the first DC voltage in the second state and output the third DC voltage to the predetermined load, wherein the third power supply is configured to stop operation in the first state;
- and
- a first control unit configured to control the first power supply so that the first DC voltage reaches a first voltage value in the first state, and control the first power supply so that the first DC voltage reaches a second voltage value lower than the first voltage value in the second state.
Dependencies are inferred from the claim text.