3D display device, method for controlling the same and computing device

A method for controlling a 3D display device that includes a display panel and an adjustable grating structure, the method comprising:

• collecting in real time current face image information of a viewer;
• based on the current face image information, calculating at a second frame rate, target status information of the adjustable grating structure, wherein the target status information of the adjustable grating structure provides a 3D image for the viewer at a current viewpoint;
• and
• adjusting a status of the adjustable grating structure at a third frame rate according to the target status information of the adjustable grating structure;
• wherein the third frame rate is greater than the second frame rate;
• wherein based on the current face image information, calculating at the second frame rate, the target status information of the adjustable grating structure, wherein the target status information of the adjustable grating structure provides the 3D image for the viewer at the current viewpoint, includes:
• establishing a coordinate system in a first extension direction perpendicular to a plane where the display panel is located and a second extension direction parallel to the plane where the display panel is located;
• calculating coordinates of the current viewpoint of the viewer at the second frame rate based on the current face image information;
• and
• based on the coordinates of the current viewpoint of the viewer, calculating at the second frame rate, the target status information of the adjustable grating structure, wherein the target status information of the adjustable grating structure provides the 3D image for the viewer at the current viewpoint;
• wherein based on the coordinates of the current viewpoint of the viewer, calculating at the second frame rate, the target status information of the adjustable grating structure, wherein the target status information of the adjustable grating structure provides the 3D image for the viewer at the current viewpoint, includes:
• calculating a grating position of each grating unit of the adjustable grating structure at the second frame rate with a formula:
• m=[(r−x)/k]% n or m=(x/k) % n;
• wherein k=2 L/n, m represents the grating position of each grating unit of the adjustable grating structure, r represents a resolution of a face image, x represents the coordinates of the current viewpoint of the viewer, k represents a width of a grating element of the adjustable grating structure, n represents a quantity of grating elements of a grating unit in the adjustable grating structure, and L represents a monocular visual zone width of the viewer, where units of r, x, k and L are pixel unit;
• and
• according to the grating position of each grating unit of the adjustable grating structure, searching for the target status information of the adjustable grating structure in a database that includes a plurality of pieces of target status information of the adjustable grating structure corresponding to a plurality of grating positions in a one-to-one manner.