Dual-screen display method for eliminating AR/VR picture tearing and AR/VR display device

A dual-screen display method for eliminating Augmented Reality (AR)/Virtual Reality (VR) picture tearing, each single screen in a dual-screen for the dual-screen display method being divided into a first half-screen and a second half-screen respectively the picture tearing is caused by a backlight black frame insertion for turning off a backlight upon a response of liquid crystal and turning on the backlight after the end of the response, and, the method comprising:

• performing rendering and scanning in parallel for the first half-screen and the second half-screen in unit of half a frame,
• wherein a rendering time of the frame is greater than a scanning time of the frame, and
• a start time of scanning the second half-screen is adjusted to eliminate a picture tearing phenomenon,
• wherein performing rendering and scanning in parallel for the first half-screen and the second half-screen in unit of half a frame comprises:
• scanning the first half-screen during a first time period in which a second half-frame is rendered, wherein the second half-frame is displayed on the second half-screen, wherein the first time period is between a first vertical sync signal Vsync1 and a first a1 sync signal sync1;
• and
• scanning the second half-screen during a second time period in which a first half-frame is rendered, wherein the first half-frame is displayed on the first half-screen, wherein the second time period is between the first sync signal sync1 and a second vertical sync signal Vsync2;
• and
• wherein the rendering of the second half-frame and the scanning of the first half-screen start at the same time and a duration for the rendering of the second half-frame is greater than that for the scanning of the first half-screen;
• wherein the rendering of the first half-frame and the scanning of the second half-screen start at the same time and a duration for the rendering of the first half-frame is greater than that for the scanning of the second half-screen.