Canon Kabushiki Kaisha

Keiji Harada

Atsushi Takahashi

Yoshiaki Takayanagi

Atsushi Sakamoto

Toshiki Takeuchi

Susumu Hirosawa

Satoshi Masuda

Kengo Nieda

Yoshiaki Kaburagi

Hideo Horigome

Yuichi Naoi

Yasutaka Mitani

Masayuki Hongo

Kazuya Koizumi

Takayuki Tanabe

Yosuke Ushigome

Yusuke Kadokura

Noboru Hada

Norio Sugiyama

The electronic apparatus including a DC motor that is driven based on a current supplied from a power source, and including: a detection circuit that detects an instantaneous interruption of the power source; an H bridge circuit having an upper arm circuit having two switching elements connected in parallel to the power source and a lower arm circuit having two switching elements connected in parallel to a ground, the upper arm circuit and the lower arm circuit being connected in series, and controlling a current to be supplied to the DC motor; and a switching control circuit that controls the switching element, and in a case where an instantaneous interruption of the power source is detected by the detection circuit, the switching control circuit sets the switching elements of the upper arm circuit to off and sets the switching elements of the lower arm circuit to on.

Electronic apparatus, control method of electronic apparatus and storage medium

The technique of the present disclosure has an object to perform PWM control of DC motors with a CPU and a motor drive circuit connected by a smaller number of serial interfaces, and provides a motor drive circuit comprising: energization control units to switch the directions of energization of motors by using switching elements to be driven by PWM signals; a reception unit to receive data indicating energization of the motor and the duty ratio of the PWM signal for each energization control unit from a computation apparatus by serial communication; a first signal generation unit to generate a motor control signal for controlling energization of the motor and the duty ratio based on the data for each energization control unit; and a second signal generation unit to generate the PWM signal having the duty ratio set according to the corresponding motor control signal for each energization control unit.

Motor drive circuit, method of controlling same, and storage medium

There are provided a printing apparatus, a method for controlling the printing apparatus, and a storage medium. The printing apparatus includes a conveying unit that conveys a print medium; a print head that applies a color material on the print medium; an obtaining unit configured to obtain, in the case where a first surface of the print medium on which a first image is printed comes in contact with the conveying unit, information on a printing condition of the first surface that becomes a factor of changing a conveying speed of the print medium in the predetermined direction; and a control unit configured to control timing of applying a color material on a second surface of the print medium that is a surface at the opposite to the first surface according to the printing condition indicated by the information obtained by the obtaining unit.

Printing apparatus, method for controlling printing apparatus, and storage medium

This invention is directed to a power supply apparatus and a printing apparatus, which have a function of easily relaxing an output voltage rise caused by an abrupt decrease in load current by a simple arrangement. In an embodiment of the invention, a dummy load is connected to some of power supply circuits included in the power supply apparatus. When an input voltage from a DC power supply falls below a predetermined threshold value, a power supply from the power supply circuit to an integrated circuit to which an electric power is supplied is stopped in synchronism with a reset signal output to the integrated circuit. At this time, an electric power from the power supply circuit is partially supplied to the dummy load, thereby relaxing an abrupt variation of the output voltage.

Power supply system has relaxation circuit which is enabled simultaneously with the outputting of reset signal to relax an output voltage

An electronic device and its power supply method for charging a battery of the device, which normally operates as a master, through a power supply line, without impairing a function as a master. For example, in an environment where a battery-driven first electronic device and an AC power-driven second electronic device are interconnected via a communication path including a power supply line, it is detected whether or not the capacity of the battery in the first electronic device is sufficient, and in accordance with the result of detection, power supply from the second electronic device is requested. In accordance with the request, electric power from the AC power source of the second electronic device is supplied to the first electronic device via the power supply line, to charge the battery of the first electronic device with the power supply, and it is monitored whether or not the charging has been completed. In accordance with the result of monitoring, the power supply from the second electronic device is stopped, and the first and second electronic devices are returned to a communication stand-by status.

Electronic device and power supply method

Growing community of inventors

Yokohama, Japan

Keiji Harada