What is bare-eye 3D technology?

　　 Autostereoscopy Autostereoscopy is a general term for technologies that achieve stereoscopic visual effects without using external tools such as polarized glasses. The main representatives of this type of technology are parallax barrier and lenticular lens technologies.

　　How does autostereoscopic 3D technology work?

　　Function

　　 Autostereoscopic 3D Visual training systems can effectively restore the stereoscopic function of amblyopic children's eyes and significantly improve the eyesight of mildly myopic school-aged children. The younger the age and the lower the myopia refractive power of the child, the better the eyesight improvement after training.

　　What are the mainstream technological means of autostereoscopic 3D?

　　Mainstream autostereoscopic 3D technologies include lenticular lens, parallax barrier, and active backlighting.

　　1. Parallax barrier. The principle of this technology is that after adding a parallax barrier to the front of the screen, when the image that the left eye should see appears on the LCD screen, the opaque stripes may block the right eye. Similarly, when the image that the right eye should see appears on the LCD screen, the opaque stripes block the left eye, separating the visual images of the left and right eyes, allowing the viewer to see a 3D image.

　　2. Lenticular lens. The principle of this technology is to use the refraction principle of the lens to project the corresponding pixels of the left and right eyes onto the left and right eyes respectively, achieving image separation. Compared with the parallax barrier technology, a major advantage is that the lens does not block light, so the brightness is greatly improved.

　　3. Directed light source. Simply put, it is to precisely control two sets of images, projecting them onto the left and right eyes respectively.

　　Advantages and Disadvantages of Autostereoscopic 3D

　　Parallax barrier - Parallax barrier autostereoscopic 3D technology, also known as parallax barrier technology, is similar in principle to polarized 3D and is the result of more than ten years of research by engineers at Sharp's European research institute. Parallax barrier 3D products are compatible with traditional LCD processes, which is beneficial for mass production and cost, but the image resolution and brightness of products using this technology will be reduced. A series of vertical stripes in the 90 direction are made using a liquid crystal layer and a polarizing film.

　　Advantages: Compatible with existing LCD processes, advantageous in mass production and cost.

　　Disadvantages: If the screen brightness is low, the resolution will decrease proportionally when the display plays video simultaneously.

　　 Autostereoscopic 3D Lenticular lens - Lenticular lens technology, also known as biconvex lens or micro-lenticular 3D technology, has the major advantage of not affecting brightness. The principle of lenticular lens 3D technology is to add a lenticular lens in front of the LCD screen.

　　Advantages: 3D technology displays better without affecting brightness.

　　Disadvantages: Related manufacturing is not compatible with existing LCD processes, requiring investment in new equipment and production lines.

　　Illumination - 3M is mainly working on illumination 3D technology. Combining illumination 3D technology with two sets of LEDs, combined with fast-response LCD panels and driving methods to arrange 3D content, allows the viewer's left and right eyes to exchange images to produce parallax, thus experiencing the 3D effect. Recently, 3M showcased a successfully developed 3D optical film. This product allows mobile phones and other handheld devices to display true 3D stereoscopic video without 3D glasses, greatly improving mobile-based communication and interaction. Advantages: Resolution and light transmittance do not affect the existing design architecture while ensuring excellent 3D display.

　　Disadvantages: The technology is still under development, and the product is immature.