Canon Kabushiki Kaisha

Masayuki Hongo

Shinji Takagi

Hiroyuki Tamaki

Hiroshi Nakai

Manabu Yamazoe

Kosuke Yamamoto

Kenichi Moriya

Shusuke Inamura

Keiji Harada

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

An image reading apparatus executes stop processing to stop scanning of the carriage during the scan operation, acquires information on the stop processing executed by the control unit, corrects a restart position of the carriage for a document image reading after the stop processing based on the information acquired.

Image reading apparatus and method

A recording apparatus provided with an interface for supplying an electric power to a connected electronic apparatus, and capable of performing a recording operation on a recording medium by the use of a recording head. A power source supplying unit supplies predetermined electric power to the electronic apparatus connected to the interface, and a detecting unit detects that the electronic apparatus has been connected. An acquiring unit acquires power information of the electronic apparatus, such as information indicating the nature of the interface or information indicating the power requirements. Based on detection of the connection by the detecting unit and the power information acquired by the acquiring unit, a control unit effects a change over of control of the recording operation.

Recording apparatus and electronic apparatus

A motor driver circuit comprising a diving circuit for driving at least one motor, a plurality of DC/DC converters, and a stopping circuit for stopping the DC/DC converter if failure is detected in an output of the DC/DC converter, wherein a first signal is outputted when a specific DC/DC converter of the plurality of DC/DC converters is stopped by the stopping circuit, and a specific DC/DC converter is recovered when a second signal is inputted. A CPU of an apparatus incorporated with the motor driver circuit is informed that the specific DC/DC converter has been stopped by the stopping circuit. Moreover, the stopped DC/DC converter can be recovered without need for turning off a power supply of the motor driver circuit itself.

Motor driver circuit, control method thereof, and electronic apparatus

A motor driver circuit includes a diving circuit for driving at least one motor, a plurality of DC/DC converters for respectively generating different voltages, a detection circuit to detect an output failure in the plurality of DC/DC converters, and a stopping circuit for stopping a specific DC/DC converter if failure is detected in an output of the specific DC/DC converter. In addition, a signal output circuit outputs a first signal if the specific DC/DC converter of the plurality of DC/DC converters is stopped by the stopping circuit, recovery means recovers the specific DC/DC converter when a second signal is inputted, and a reset circuit stops the rest of the plurality of DC/DC converters, if the stopping circuit stops any one of the plurality of DC/DC converters other than the specific DC/DC converter.

There is provided a recording apparatus for receiving recording data from an electronic apparatus or a host computer activated by being supplied with a power source through an interface, and performing a recording operation on a recording medium by the use of a recording head. This recording apparatus comprises power source supplying means for supplying predetermined electric power to the electronic apparatus, detecting means for detecting that the electronic apparatus has been connected, and control mans for changing over the control of the recording operation when the detecting means has detected the connection or non-connection of the electronic apparatus. Also, there is provided an electronic apparatus for effecting communication with a first external device activated by being supplied with a power source through a first interface and a second external device connected thereto through a second interface, and performing an operation. This electronic apparatus comprises power source supplying means for supplying predetermined electric power to the first external device, detecting means for detecting that the first external device has been connected, and control means for changing over the control of the operation when the detecting means has detected the connection or non-connection of the first external device.

An ink jet recording apparatus for recording by discharging ink from nozzles of a recording head to a recording medium comprises a figure recording control section for executing recording control of figure draw commands for ruled lines and other figures, and a bitmap recording control section for executing recording control of draw commands other than the figure draw commands by developing bitmaps. For this ink jet recording apparatus, draw commands are individually controlled by the recording control sections, respectively, and at the same time, recording is performed by relatively moving in the intersecting two directions a recording head for discharging ink by the draw commands, and a recording medium held by a recording medium holding unit in the position facing the ink discharge surface of the recording head. With the structure thus arranged, it becomes possible to materialize an ink jet recording apparatus which can output high quality images while neither creating deviating seams of ruled lines to the left or right nor creating black strips or white strips.

Growing community of inventors

Yokohama, Japan

Masayuki Hongo