Photographic device

Abstract

A photographing apparatus is capable of data communication with equipment connected to the photographing apparatus via a communication cable and capable of supplying power to the equipment via the communication cable. The apparatus includes: a connecting section for connecting the communication cable; a connection detecting section for detecting connection of the communication cable to the connecting section; a recognizing section for recognizing that a photographing process is under operation; and a power supply controller for controlling power supply to the communication cable. Wherein, when the connection detecting section has detected that the communication cable is connected to the connection section and the recognizing section has recognized that the photographing process is under operation, the power supply controller controls not to supply power to the communication cable.

Description

technical field [0001] The present invention relates to a photographing device and a power supply method connected to another electronic device. Background technique [0002] In recent years, the USB (Universal Serial Bus) standard has been popularized as an interface standard for connecting a personal computer and its peripheral devices and performing communication between the two devices. The USB standard is a standard that has been established and made public by a number of companies. For example, when a personal computer and a digital camera are connected according to the USB standard, the personal computer works as a host, and the digital camera as a peripheral device acts as a slave. Work. Furthermore, a personal computer serving as a host is configured to supply power necessary for communication between the two devices. [0003] In addition, as a supplementary description of the USB standard, the USB OTG (On The Go) protocol, which is a standard for connecting perip...

AI Technical Summary

Problems solved by technology

[0005] However, in such a conventional method of supplying power to an imaging device, for example, when the digital camera is operated as a host computer, communication with the connected peripheral devices is not performed during the imaging operation of the digital camera. The power required for communication is continuously supplied, so the power of the digital camera is unnecessarily consumed

Since digital cameras usually use batteries for power supply, there is a problem that the utilization efficiency of batteries is reduced due to unnecessary power loss.

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