POWER SUPPLY DEVICE AND IMAGE FORMING APPARATUS INCLUDING POWER SUPPLY DEVICE
To provide a power supply device that accurately detects the operation of a power supply switch even before voltage rises after insertion of a power cable.SOLUTION: A power supply switch detection unit 6 detects the operation of a power supply switch 7 with a voltage that is input when the power sup...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a power supply device that accurately detects the operation of a power supply switch even before voltage rises after insertion of a power cable.SOLUTION: A power supply switch detection unit 6 detects the operation of a power supply switch 7 with a voltage that is input when the power supply switch 7 is operated and outputs an operation signal 13 representing that the power supply switch 7 is operated. A voltage detection unit 5 sets up a switching unit 15 such that when a voltage Vcc is not increased to a predetermined voltage value, a voltage output from a battery 16 is input to a power supply switch detection unit 6 and sets up the switching unit 15 such that when the voltage Vcc is increased to the predetermined voltage value, the voltage Vcc is input to the power supply switch detection unit 6. A main body control unit 4 detects the operation of the power supply switch 7 with an operation signal 13 and performs initialization processing, and after the end of the initialization processing, resets the operation signal 13.SELECTED DRAWING: Figure 1
【課題】電源ケーブルの挿入後に電圧が立ち上がる前であっても電源スイッチの操作を正確に検出する電源装置を提供する。【解決手段】電源スイッチ検出部6は、電源スイッチ7が操作されることで入力される電圧により電源スイッチ7の操作を検出し、電源スイッチ7が操作されたことを表す操作信号13を出力する。電圧検出部5は、電圧Vccが所定の電圧値まで上昇していない場合にバッテリ16から出力される電圧が電源スイッチ検出部6に入力されるように切替部15を設定し、電圧Vccが所定の電圧値まで上昇している場合に電圧Vccが電源スイッチ検出部6に入力されるように切替部15を設定する。本体制御部4は、操作信号13により電源スイッチ7の操作を検出して初期化処理を行い、初期化処理が終了すると操作信号13をリセットする。【選択図】図1 |
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