Method for calibrating liquid crystal prism of display device and display device

A method for calibrating a liquid crystal prism of a display device, the display device comprising a display panel and a plurality of liquid crystal prisms located on a light-emitting side of the display panel, the display panel comprising a plurality of sub-pixels, one of the plurality of liquid crystal prisms overlapping with the plurality of sub-pixels in a direction perpendicular to a plane of the display panel, and the plurality of sub-pixels overlapped by the one liquid crystal prism being respectively configured to present images of different visual areas,

• wherein the method comprises:
• applying a first driving voltage to the one liquid crystal prism based on a first mapping relationship, controlling a first visual area and a second visual area to display a first image, and controlling a third visual area and a fourth visual area to display a second image, wherein the first mapping relationship is a first corresponding relationship between the plurality of sub-pixels overlapped by the one liquid crystal prism and a plurality of visual areas, the first visual area and the second visual area are respectively configured to present a left-eye image and a right-eye image at a first view point, the first image is a solid-color image, the second image is a nonsolid-color image, and the second image comprises a main pattern;
• acquiring a second driving voltage based on visibility of the main pattern at the first view point;
• and
• applying the second driving voltage to the one liquid crystal prism, controlling one of the third visual area and the fourth visual area to display the second image and the other of the third visual area and the fourth visual area not to display in a same time period, and acquiring a second mapping relationship based on the visibility of the main pattern at the first view point, wherein the second mapping relationship is a second corresponding relationship between the plurality of sub-pixels overlapped by the one liquid crystal prism and the plurality of visual areas.