3d is 3 d graphics. Displaying 3d graphics in a computer means displaying 3D graphics in a plane. Different from the real world, the real three-dimensional space has a real distance space. The computer just looks like the real world, so the 3d graphics displayed on the computer are just like the real world. One of the characteristics of the human eye is that when the distance is combined, it will form a three-dimensional sense.

At present, the mainstream naked-eye 3D technologies include slit liquid crystal grating, columnar prism and directional light source. 1, slit liquid crystal grating. The principle of this technology is that after adding a slit grating in front of the screen, when the image that should be seen by the left eye is displayed on the LCD screen, opaque stripes will block the right eye; Similarly, when the image that should be seen by the right eye is displayed on the LCD screen, the opaque stripes will block the left eye, and the viewer can see the 3D image by separating the visual images of the left eye and the right eye. 2. The technical principle of cylindrical prism is to project the pixels corresponding to the left and right eyes to the left and right eyes respectively through the refraction principle of lens, so as to realize image separation. Compared with slit grating technology, the biggest advantage is that the lens will not block the light, so the brightness has been greatly improved. 3. Aiming at the light source is simply to accurately control two sets of screens to project images to the left and right eyes respectively.

Three-dimensional holographic projection is a three-dimensional technology that records and reproduces the real image of an object by using the principles of interference and diffraction. It is a 3D technology without glasses, and the audience can see three-dimensional virtual characters. This technology is widely used in some museums. Holographic projection is a Nolid 3D technology without glasses, and the audience can see three-dimensional virtual characters. This technology is widely used in some museums. Holographic stereoscopic projection equipment is not realized by digital technology, but the projection equipment projects images from different angles onto imported MP holographic projection film, so that you can't see other images that don't belong to your own angle, thus realizing real holographic stereoscopic images.

3d is to look at the display with glasses, and vr itself is the display.