HDMI SOURCE DETECTION
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United States of America Patent
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app pub date -
Dec 4, 2013
filing date -
Dec 17, 2007
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Abandoned
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Abstract
A circuit for detection of an HDMI source device to an HDMI sink device through an HDMI sink connector without regard for the activity state of the HDMI source device has a pull-up resistor connecting a DC power source to the DDC/CEC ground node. The node is readable as a binary signal to indicate the presence of a source device to the HDMI sink connector, where the node exhibits a logic low signal when either the node is grounded by the DDC/CEC GROUND pin connection to a source device or when a switching device is switched on. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
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