What are the classifications of naked-eye 3D?

　　 Bare-eye 3D What are the classifications?

　　Technically, bare-eye 3D can be divided into three types: square wall-type lenticular technology and light sources. The biggest advantage of bare-eye 3D technology is that it eliminates the need for glasses, but there are still many shortcomings in terms of resolution, viewing angle, and viewing distance.

　　When viewing, the audience must maintain a certain position relative to the display device in order to see the 3D image (the 3D effect is greatly affected by the viewing angle). The 3D screen differs from general polarization 3D technology and shutter 3D technology. However, LCD panel industry giants such as AU Optronics and R&D giants such as 3M are actively conducting research and development, and some bare 3D display devices are expected to be mass-produced in the next one or two years.

　　 Bare-eye 3D What is the technical principle?

　　Computer screens are flat two-dimensional. The reason we can appreciate three-dimensional images that look like real objects is that when they appear on the computer screen, the color grayscale is different, so the human eye will have visual illusions, identifying the two-dimensional computer screen as a three-dimensional image. According to the relevant knowledge of color science, the protruding parts of the edges of three-dimensional objects are generally displayed in high-brightness colors, while the recessed parts are obscured by light and appear dark. This recognition is widely used in web pages or other applications to draw buttons and 3D lines. For example, the 3D text to be drawn displays high-brightness colors in the original position, and draws outlines in low-brightness colors in positions such as the lower left or upper right to intuitively represent the effect of 3D text. During specific implementation, completely identical fonts can be used to draw two different colors of 2D text in different positions. If the coordinates of the two characters are correct, 3D text that can produce different effects can be intuitively created.

　　Nowadays, mainstream 3D stereoscopic display technology still cannot get rid of the constraints of special glasses, so the scope of application and ease of use are both discounted. Moreover, many 3D technologies can cause nausea, dizziness, etc., for people with long-term experience.

　　Bare-eye 3D light barrier technology

　　Square wall-type 3D technology uses switch LCDs, polarizing films, and polymer LCD layers to create vertical stripes in a 90-degree direction using LCD layers and polarizing films. These stripes are tens of micrometers wide, and the light passing through them forms a vertical fine grating pattern called a "parallax barrier." This technology uses a parallax barrier installed between the backlight module and the LCD screen. It separates the visual images of the left and right eyes, allowing viewers to see 3D images.

　　The advantage of this technology is that Sharp's 3D phones and Nintendo's 3DS both use this technology, which is cost-effective. However, the screen brightness of this technology is relatively low.

　　 Bare-eye 3D Circular lenticular technology

　　Lenticular technology, also known as micro-lenticular 3D technology, divides the image pixels of the LCD into multiple sub-pixels by placing the image plane of the LCD on the focal plane of the lens, allowing the lens to project each sub-pixel in different directions. Therefore, the two eyes can see different sub-pixels from different angles. Lenticular technology does not affect screen brightness like light barriers, so it looks better than the latter.