Canon Kabushiki Kaisha

Hiromi Hayasaki

Kenji Ishii

Kouji Ikeda

Kei Tohyama

Takayuki Shu

Yoshinobu Okano

Hiromichi Sakamoto

Yuhei Hattori

An electronic apparatus includes a plurality of contacts electrically connectable to an accessory and arranged in a first direction orthogonal to a direction in which the accessory is attached. The contacts include an attachment detection contact to detect an attachment of the accessory to the electronic apparatus, and a communication request contact for a communication request from the accessory to the electronic apparatus. The attachment detection and communication request contacts are disposed between a contact closest one end and a contact closest to another end in the first direction. The attachment detection contact is disposed between the communication request contact and the contact closest to the one end. In the first direction, a distance between the attachment detection contact and the communication request contact is shorter than that between the communication request contact and the contact closest to the other end.

Electronic apparatus and accessory

An electronic apparatus to which an accessory is to be detachably attached includes a plurality of contacts electrically connectable to the accessory and arranged in a row. The contacts include a plurality of functional signal contacts to which signals having functions that are different functions according to a type of the accessory are connected, reference potential contacts, to each of which a reference potential is connected, and contacts that are used to supply power to the accessory or to communicate with the accessory. The functional signal contacts include a first functional signal contact and a second functional signal contact. A distance from the first functional signal contact to a reference potential contact closest to the first functional signal contact and a distance from the second functional signal contact to a reference potential contact closest to the second functional signal contact are different from each other.

An electronic apparatus to which an accessory is to be detachably attached includes a plurality of contacts electrically connectable to the accessory and arranged in a first direction orthogonal to an attachment direction of the accessory. The plurality of contacts include an attachment detection contact that is used to detect an attachment of the accessory to the electronic apparatus, and a first clock contact that is used to communicate a first clock signal in communication between the electronic apparatus and the accessory. A potential of the attachment detection contact changes from a predetermined potential to a reference potential different from the predetermined potential after the accessory is attached to the electronic apparatus. The attachment detection contact is disposed next to the first clock contact.

An electronic apparatus to which an accessory is to be detachably attached includes a plurality of contacts electrically connectable to the accessory and arranged in a first direction orthogonal to an attachment direction of the accessory. The plurality of contacts include first reference potential contacts that are contacts disposed at both ends of the plurality of contacts and are connected to a reference potential, and second reference potential contacts that are connected to the reference potential and are contacts disposed at both ends of part of the plurality of contacts other than the first reference potential contacts in a case where the accessory is connected to the part of the plurality of contacts.

A shoe apparatus attachable to and detachable from an accessory shoe apparatus of an electronic apparatus in a first direction includes a plurality of connection terminals arranged in a second direction orthogonal to the first direction, a shoe engagement portion engageable with the accessory shoe apparatus, and a terminal protecting portion configured to project from the shoe engagement portion toward a tip side in the first direction and to protect the plurality of connection terminals. The plurality of connection terminals are exposed in a direction orthogonal to the first and second directions from the terminal protecting portion, and include slopes that tilt in an exposed direction from inside to outside in the second direction on both sides in the second direction of the terminal protecting portion.

Shoe apparatus, accessory, accessory shoe apparatus, and electronic apparatus

An electronic apparatus includes an accessory shoe via which an accessory is to be detachably attached to the electronic apparatus. The accessory shoe includes a plurality of contacts that is electrically connectable to the accessory and arranged in a row, and include an attachment detection contact, a power supply contact, and a first reference potential contact that is connected to a reference potential. A potential of the attachment detection contact becomes the reference potential in a case where the accessory is attached to the electronic apparatus. The attachment detection contact is disposed on one of both sides of the power supply contact, and the first reference potential contact is disposed on another side. The first reference potential contact is disposed outside the power supply contact in an arrangement direction of the plurality of contacts.

An electronic apparatus detachably attached to an accessory via an accessory shoe includes contacts electrically connectable to the accessory via the accessory shoe and arranged in a row. The contacts include a first signal contact used to transmit a data signal in a communication between the electronic apparatus and accessory, a second signal contact used to transmit a clock signal in synchronization with the data signal in the communication, and a third signal contact used to receive a communication request signal from the accessory. The first and second signal contacts are arranged next to each other. The third signal contact is disposed on an opposite side of than the second signal contact with respect to the first signal contact. A transmission of the data signal via the first signal contact is executed in response to a reception of the communication request signal via the third signal contact.

A battery device includes a connection unit to which an electronic apparatus is connected, a calculation unit that calculates a remaining battery level of a battery of the battery device based on a full charge capacity of a battery of the electronic apparatus, and a display unit that displays information indicating a result of calculation made by the calculation unit.

Battery device that provides a notification relating to a remaining charge capacity, and control method thereof

An electronic apparatus includes a connection unit to which a battery device is connected, a calculation unit that calculates a remaining battery level of a battery of the battery device based on a full charge capacity of a battery of the electronic apparatus, and a display unit that displays information indicating a result of calculation made by the calculation unit.

Electronic apparatus and control method

The electronic apparatus allows a user to arbitrarily set a display of a remaining battery level. The apparatus includes a detector which detects a remaining battery level of a battery, and a threshold-value-setting part which is operated by a user to set a threshold value for performing a display relating to the remaining battery level. The apparatus further includes a controller which displays in a display device an image representing the remaining battery level in accordance with the result of a comparison between the remaining battery level detected by the detector and the threshold value set with the threshold-value-setting part.

Electronic apparatus and display method of remaining battery level

An electronic equipment comprises a first computer, a first power line over which power is supplied to the first computer, a second computer, a second power line over which power is supplied to the second computer, and a switch having one terminal thereof connected with a data bus to which the first computer is connected, and having the other terminal thereof connected with a data bus to which the second computer is connected. When power is supplied to the second computer over the second power line, the switch connects the data bus to which the first computer is connected with the data bus to which the second computer is connected. When no power is supplied to the second computer over the second power line, the switch isolates the data bus to which the first computer is connected from the data bus to which the second computer is connected.

Growing community of inventors

Kanagawa, Japan

Hiromi Hayasaki