The principle of naked-eye 3D technology

Bare-eye 3D It is a general term for technologies that achieve a three-dimensional effect without the need for external tools (such as polarized glasses). Currently, the main representatives of this technology include grating technology and cylindrical lens technology, with the latest technology being "distributed optical matrix" technology.

Bare-eye 3D Technical Effects:

The bare-eye 3D visual training system can effectively restore the binocular stereoscopic function of amblyopic children [2-4], and it can also significantly improve the eyesight of mildly myopic school-aged children. The younger the child, the smaller the refractive power of myopia, and the better the effect of vision improvement training. [5]

Mainstream Bare-eye 3D Technology

Currently, mainstream bare-eye 3D technologies include: slit LCD grating, cylindrical lens, directional light source, and active backlight.

1. Slit LCD grating. The principle of this technology is that after adding a slit grating in front of the screen, when the LCD screen displays the image that the left eye should see, the opaque stripes will cover the right eye. For the same reason, the image that should be seen by the right eye is displayed. When on the LCD screen, the opaque stripes will block the left eye. By separating the images visible to the left and right eyes, the viewer can see a 3D image.

2. Cylindrical lens. The principle of this technology is to project the pixels corresponding to the left and right eyes onto the left and right eyes through the refraction principle of the lens to achieve image separation. Compared with the slit grating technology, the biggest advantage of the lens is that it does not block light, so the brightness is greatly improved.

3. Directional light source. In short, it can precisely control two sets of screens, projecting images onto the left and right eyes respectively.

Bare-eye 3D Technical Principle

Grating Bare-eye 3D Technology

The implementation method of grating bare-eye 3D technology is to use a switching LCD screen, polarizing film, and a polymer liquid crystal layer to use the liquid crystal layer and polarizing film to form a series of vertical stripes in the 90° direction. The width of these stripes is tens of micrometers, and the light passing through them forms a vertical fine grid pattern, called a "parallax barrier". This technology utilizes a parallax barrier located between the backlight module and the LCD panel. By separating the images visible to the left and right eyes, the viewer can see a 3D image.

The advantage of this technology is that it has a cost advantage, such as Sharp's 3D mobile phones and Nintendo's 3DS game consoles. However, the screen brightness using this technology is lower.

Bare-eye 3D Convex Lens Technology

Cylindrical lens technology is also called micro-cylindrical lens 3D technology. The image plane of the LCD screen is located on the focal plane of the lens, so the image pixels under each cylindrical lens are divided into several sub-pixels, so that the lens can be different. Direction. Therefore, when the two eyes look at the display from different angles, they can see different sub-pixels.

Biconvex lens technology does not affect the brightness of the screen like the grating type, so its display effect is superior to the latter.