The advantage of EDID emulators

The advantage of EDID emulators

The advantage of EDID emulators

1. What’s EDID?

EDID, or Extended Display Identification Data, is a metadata format used to describe their capabilities to a video source. The EDID data structure includes the manufacturer name and serial number, product type, phosphor or filter type, time of day supported by the display, etc.


2. Why to use EDID?

In short, EDID is the ID card of a monitor. By reading the monitor's EDID, the computer can know the properties of that monitor and then make the PC output the video that best suits that monitor.

When monitor is connected to PC, there will be a conversation between them, ‘Hello, PC! I’m monitor A, I can display multiple resolutions. The max resolution I support is XXX” “Hello, monitor! I have received your information, I will output to you at the best resolution now.”

3. If PC is unable to read EDID, what will happen?

If the computer is unable to get the EDID of the display, the computer cant know which display device it is connected, then PC may output a very low resolution picture or even not output.


4. Ordinary KVM switch    

In terms of ordinary KVM switch, as only one of the computers that connected to KVM can be selected to connect to the display, when switching the ports of the KVM, the other computers are unable to access the displayEDID, then the computers change the display settings accordinglywhich will cause a problem that after users set the window position, it will return to original position the next time it switches to current channel.


5. Our KVM switch

In TESmart's KVM switch, we add EDID emulators in each input port, so while switching the input ports,  no matter the computer is current active selected or not, the computer still can always get correct EDID. This keeps the display settings of the computer would not be changed while switching.