Canon Kabushiki Kaisha

Toru Oshika

Takashi Sakai

Yasufumi Ogasawara

Hisao Okita

Shinya Ishikawa

A power supply apparatus includes a power source unit configured to supply electric power to an electric load, a capacitor connected to a power supply line extending from the power supply unit to the electric load, a charge circuit configured to charge the capacitor while restricting a current value of the electric power supplied from the power source unit, a specifying unit configured to specify a voltage value of the capacitor, a first determination unit configured to determine whether the charge of the capacitor is completed in accordance with the voltage specified by the specifying unit, and a second determination unit configured to determine whether the voltage specified by the specifying unit is equal to or smaller than an error threshold value after the first determination unit determines that the charge of the capacitor is completed.

Power supply apparatus, printer, and control method

A control apparatus including a power supply unit configured to supply electric power, comprises: a capacitor connected to a power supply line extending from the power supply unit to a printhead; a discharge circuit configured to release charge stored in the capacitor; and a control unit configured to control a current value during a discharge operation by the discharge circuit, such that the current value increases as a voltage value of the capacitor decreases.

Control apparatus and control method of the same

A power supply apparatus includes a power source unit supplying power to an electric load through a power supply line, a capacitor connected to the power supply line, a charge circuit charging the capacitor while restricting a current value of the power supplied from the power source unit, a detection unit detecting a voltage value of the capacitor, a controller which switches, after the charge of the capacitor is completed, a current value of the charge circuit to a first current value smaller than a current value supplied before the charge of the capacitor is completed, a first determination unit determining whether a first condition is satisfied based on the voltage value detected by the detection unit after the charge of the capacitor is completed, and a second determination unit determining whether an error process is to be performed based on a determination result of the first determination unit.

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Kawasaki, Japan

Toru Oshika