| 摘要 |
The present invention relates to a KVM switch with separate on-screen display and control channels, particularly to the KVM switch is connected to a plurality of computers, monitors and operation devices. The KVM switch comprises a switch circuit connected with the computers, a video switch circuit connected with the switch circuit for sending a signal to the monitors, a separate control system connected to the video switch circuit for receiving a function command from the operation devices, and a video control and display unit connected to the separate control system for producing and sending a video signal and synchronous signal to the monitors through the video switch circuit. Because the video control and display unit can transmit the video signal containing OSD (on-screen display) functions and display contents to the video switch circuit through a separate channel, and the separate control system also sends a switching signal to the video switch circuit to shut off the video signal form the computers, therefore, an OSD (on-screen display) image displayed on the monitors has fixed settings and facilitates a user to view and operate.
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