Invention Grant
US07456906B2 Power status detection and processing of audio/video (A/V) devices in A/V networks
有权
A / V网络中音频/视频(A / V)设备的电源状态检测和处理
- Patent Title: Power status detection and processing of audio/video (A/V) devices in A/V networks
- Patent Title (中): A / V网络中音频/视频(A / V)设备的电源状态检测和处理
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Application No.: US10759577Application Date: 2004-01-16
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Publication No.: US07456906B2Publication Date: 2008-11-25
- Inventor: Tetsuya Shimizu , Atul Batra , Wang He Lou
- Applicant: Tetsuya Shimizu , Atul Batra , Wang He Lou
- Applicant Address: US CA Irvine
- Assignee: Mitsubishi Digital Electronics America, Inc.
- Current Assignee: Mitsubishi Digital Electronics America, Inc.
- Current Assignee Address: US CA Irvine
- Agency: Orrick, Herrington & Sutcliffe LLP
- Main IPC: H04N5/63
- IPC: H04N5/63 ; H04N5/268

Abstract:
Systems and methods are provided that facilitate detection and processing of A/V device power status in A/V networks. Preferably, a power detection system includes a current sensor coupled to the power cord of an A/V device, a current-to-voltage converter coupled to the sensor, a voltage comparator coupled to the converter, a reference voltage output circuit coupled to the comparator, and a micro-controller coupled to the comparator and the reference voltage output circuit. In operation, the current being drawn by the A/V device through its power cord is detected and converted to an input voltage, which is then compared to a device specific threshold voltage. If the input voltage is not greater than the threshold voltage, a “Power On” command is sent to the A/V device and the detection, conversion and comparison process is repeated. If the input voltage is greater than the threshold voltage, desired commands and/or instructions are sent to the A/V device.
Public/Granted literature
- US20050157216A1 Power status detection and processing of audio/video (A/V) devices in A/V networks Public/Granted day:2005-07-21
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