ELECTRONIC DEVICE

• US 20120254638A1
• Filed: 06/14/2012
• Published: 10/04/2012
• Est. Priority Date: 12/25/2006
• Status: Active Grant

• Current Assignee: Nikon Corporation
• Original Assignee: Nikon Corporation
• Inventors: KAWANO, Takeshi
• Granted Patent: US 8,539,266 B2
• Time in Patent Office: Days
• US Class Current: 713/300
• CPC Class Codes: G06F 1/266 Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
• CPC Class Codes: G06F 2213/0042 Universal serial bus [USB]

Abstract

A USB electronic device with a power source loaded therein, which is connected to another USB electronic device via a USB connector, comprises a voltage detection unit that detects a voltage at an identification pin of the USB connector, a power supply control unit that controls connection/disconnection between a power supply pin of the USB connector and the power source based upon a change in voltage at the identification pin detected by the voltage detection unit and an allow/disallow control unit that executes control to allow/disallow detection of the voltage change at the identification pin.

Claims

1. A USB electronic device with a power source loaded therein, which is connected to another USB electronic device via a USB connector, comprising:

a voltage detection unit that detects a voltage at an identification pin of the USB connector;

a power supply control unit that controls connection/disconnection between a power supply pin of the USB connector and the power source based upon a change in voltage at the identification pin detected by the voltage detection unit; and

an allow/disallow control unit that executes control to allow/disallow detection of the voltage change at the identification pin.