VGA video graphic array and working method thereof
A technology of video graphics array and working method, which is applied in the direction of TV, color TV, image communication, etc. It can solve the problems of affecting customer experience, poor EDID information processing, and VGA video cannot be displayed on the display, so as to facilitate centralized monitoring and increase monitoring Effects of Quantity and Flexibility
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Embodiment 1
[0024] Such as figure 1 shown.
[0025] A VGA video graphics array includes a video array control board provided with four VGA video inputs and two VGA video outputs; the VGA video input is connected to a display display through a video extension circuit and a video switching circuit in turn; the video switching circuit is connected to a control unit connect.
Embodiment 2
[0027] Such as figure 2 shown.
[0028] A kind of working method of VGA video graphics array as described in embodiment 1, comprises steps as follows:
[0029] 1) The control unit detects the number of display monitors; when the control unit detects that more than one display monitor is connected, it actively reads the EDID information of the display monitor to the control unit;
[0030] 2) If the models of the display monitors are different, the control unit compares and reorganizes the EDID information of different monitors to ensure that the resolution of the output RGB signal after the PC reads the EDID information can be displayed on all display monitors;
[0031] The specific process of comparison and reorganization is that the control unit compares the read EDID information of multiple displays one by one at the byte level, and if the byte information is different, the EDID information of the display with a lower specification shall prevail for reorganization;
[003...
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