The method of controlling a large screen from multiple computers simultaneously

　　If the large screen is a LCD splicing screen, and there are 4 computer signals that need to be displayed on the screen simultaneously, then only a high-definition HDMI matrix with 4 inputs is needed, and the number of outputs depends on the number of LCD splicing screens. Connect the output end of the HDMI matrix to the LCD splicing screen, and the input end to the high-definition interface of the computer. At the same time, connect the LCD splicing screen in series through the RS232 interface, so as to achieve the function of multiple computers displaying content simultaneously. For example, allowing one screen to display the content of a computer, or allowing certain screens to display the content of a computer, can all be assigned arbitrarily in software by controlling the computer.

　　If it is a DLP large screen or LED display screen, as they do not have splicing function, they are generally equipped with an external splicing processor to control and switch computer signals. This external splicing processor combines matrix function and can also decode video monitoring, making it a more powerful control device.

　　In short, it is necessary to use control devices to achieve this. Firstly, high-definition matrices, and secondly, external splicing processors can basically solve the requirement of multiple computers displaying on a large screen simultaneously. If we have both computer signals and monitoring signals, we can use a decoder to achieve this, because the decoder also has matrix function.

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