Canon Kabushiki Kaisha

Akihiko Hamamoto

Mitsuhiro Ono

Tetsuya Suwa

Fumihiro Goto

Osamu Yamada

Takao Aichi

Atsushi Nakamura

Kazuyuki Masumoto

Tetsuya Kawanabe

Kiyoharu Yoshioka

Hiroyuki Kuriyama

Naoshi Inoue

Shigehiro Kadota

Makoto Hibi

Soji Hamano

Masato Oshima

Makoto Hinohara

There is disclosed an electronic equipment system consisting of an electronic equipment and an expander detachably attached thereto and provided with a power source circuit and a power source control circuit in each of the electronic equipment and the expander, the system comprising attachment detecting means for detecting that the expander is attached to electronic equipment, power supply control means for controlling permission or inhibition of power supply to the power source circuit of the other side, other power source control circuit activating means for activating the power source control circuit of the other side by initiating the power supply from the power source circuit of the other side to the power source control circuit of the other side, and informing means for informing the operation status of the power source control circuit of the self side to the power source control circuit of the other side, wherein, in case the attachment detecting means detects the attachment of the expander to the electronic equipment, the power source control circuit of the self side permits the power supply by the power supply control means to the power source circuit of the other side, also causes the other power source control circuit activating means to initiate the power supply from the power source circuit of the other side to the power source control circuit of the other side thereby activating the power source control circuit of the other side, also causes the informing means to inform the operation status of the power source control circuit of the self side to the power source control circuit of the other side, thereby effecting power supply processes synchronized between the both power source control circuits.

Battery-driven electronic equipment system and power source control method therefor

Disclosed is a portable information processing apparatus that can detect a remaining battery charge level quickly and comparatively accurately while it eliminates the influence of noise that can be caused when a remaining battery charge is to be detected, that can prevent a battery pack from being mistakenly identified as abnormal by delaying the timing for detecting the unbalanced state of the voltages at each voltage row, which can occur temporarily during the charging of a secondary battery pack when a plurality of cells are connected in series and parallel, that changes power control procedures for each different suspend mode so that it can control with no problem the supply of power to a unit, such as a printer unit, that consumes a large current, even when a remaining battery charge is comparatively low and that can match the phases of the individual units to ensure rebooting is actually performed when a power supply SW is turned on or off at an arbitrary time.

Battery operated information processing apparatus

A recording apparatus for recording an image on a recording medium by scanning a recording head, includes a scan unit for scanning the recording head by changing the scan speed of the recording head, and a control unit for controlling the scan unit to change the scan speed of the recording head according to the resolution of image data to be recorded by the recording head so as to perform recording. A recording controller for controlling the recording apparatus is also disclosed.

Serial recording system capable of varing resolution

There is disclosed an image reading apparatus having a sensor in which a plurality of photo-reception elements are arranged, a displacement mechanism for changing a relative position between the sensor and an original in an arranging direction of the photo-reception elements or a direction different from the arranging direction, a detecting unit for detecting an image interval on the original which was read by the sensor, and a control unit for controlling a relative displacement direction or displacement amount between the sensor and the original due to the displacement mechanism in accordance with the image interval detected by the detecting unit.

Image reading system having relative displacement control means

An information processing apparatus according to the present invention stores suspension data in a non-volatile storage and performs a 0 V suspension process by which are turned off all power sources of the apparatus. An active suspension process is performed, by which are turned off power sources of the apparatus, excluding a power source that supplies power to the volatile storage. The 0 V suspension process is performed when a power supply voltage level is lower than a predetermined value, while the active suspension process is performed when that voltage level is higher than the predetermined level. The apparatus also predicts a processing time for a transfer unit and a power characteristic for a second storage unit. In addition, remaining power is detected using a reference value that is set at a first predetermined value in accordance with results obtained from the two predictions. The apparatus also has a storage unit that includes expanded memory areas, which are acquired by dividing available space into a plurality of blocks, and an expanded memory system, which has a plurality of page frames that are assigned to the blocks, and manages correspondence between the blocks and the page frames.

Suspension state control for information processing devices such as

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Kawasaki, Japan

Akihiko Hamamoto