Signal switching device, signal distribution device, display device, and signal transmission system
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United States of America Patent
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May 25, 2010
Grant Date -
Jun 29, 2006
app pub date -
Jul 12, 2004
filing date -
Jul 14, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A signal switching device including an interface having a video signal communicating unit, a DDC and an HPD, controlling connected device, or being controlled by connected device. A switcher (2) includes a switch (30) selecting video signal input, a DDC (26c) reading information from output destination device, a microcomputer (33) reading information indicating a physical address of switcher (2) and a status of the output destination device through DDC (26c), and a DDC (22a) and a DDC (22b) outputting information to a plurality of input source devices. The microcomputer (33) stores the physical address of the switcher (2) and above-mentioned information into an EDID memory (32) and reads the above-mentioned information out of the EDID memory (32) and outputs through the DDC (22a) and the DDC (22b).
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