Viewing angle switching system and display device thereof

The utility model discloses a visual angle switching system and a display device thereof, and the visual angle switching system comprises a drive circuit which generates a square wave signal; the signal conversion circuit is connected with the driving circuit to obtain a trigger signal according to the square wave signal, and comprises an input end connected with the driving circuit to receive thesquare wave signal; a voltage division network; the control end of the switching tube is connected with the input end through a voltage division network, the first access end is connected with powersupply voltage, the second access end is grounded, and the first access end serves as the output end of the signal conversion circuit to be connected with the delay module; the delay module is connected with the signal conversion circuit to receive the trigger signal, and the digital-to-analog conversion module is connected between the delay module and the display panel to output a common voltagefor switching the display m