Virtualization technology is to make full use of the pixel modulation tube on LED display with the application software algorithm, to display the different brightness of modulation tube in different times and different sections according to the output characteristics of the duty ratio of LED (lighting-emitting diode) and the human visual persistence characteristics, so as to display the contents in approximately four times under the condition of same pixel amounts. Of course, the application of virtualization technology will reduce the brightness to some extent.