More than ten years ago, many newspapers and magazines had red and blue 3D inserts on their pictures, with a pair of red and blue glasses, but the three-dimensional effect was not obvious, and the colors were also different. Now, we have been able to directly watch the super-clear 3D images with very high-quality naked eye without glasses, and this has only been a short period of more than 10 years.
Throughout the development of display technology, from the flat screen has been developed to three-dimensional 3D screen, which is the biggest breakthrough in display technology development. At present, naked-eye type 3D mainly includes a light barrier type, a lenticular lens technology, a pointing light source, and the like.
Optical barrier technology
The light barrier type 3D technology is implemented by using a switch liquid crystal panel, a polarizing film, and a polymer liquid crystal layer, and a series of vertical stripes with a direction of 90[deg.] are manufactured using the liquid crystal layer and the polarizing film. These stripes are a few tens of micrometers wide, and through their light, they form a vertical thin grating pattern called "parallax barrier." This technology utilizes the parallax barrier placed between the backlight module and the LCD panel. In the stereoscopic display mode, when the image seen by the left eye is displayed on the LCD screen, the opaque stripes will block the right eye. Similarly, When the image that should be seen by the right eye is displayed on the liquid crystal screen, the opaque stripes block the left eye, and the viewer is allowed to see the 3D image by separating the visible screens of the left and right eyes.
The advantage of this technology is that it has advantages in terms of cost. Currently, 3D mobile phones such as Sharp and Nintendo's 3DS game machines use this technology. However, the screen brightness using this technique is low.
Cylindrical lens technology
The lenticular lens technology is also known as the micro-pillar lens 3D technology. Its biggest advantage is that its brightness will not be affected. The principle of the lenticular lens 3D technology is to add a layer of lenticular lenses in front of the liquid crystal display so that the image plane of the liquid crystal screen is located on the focal plane of the lens, so that the pixels of the image under each lens lens are divided into several sub-pixels. This allows the lens to project each subpixel in a different direction. Then the eyes look at the display from different angles and see different sub-pixels.
The lenticular technology does not affect the screen brightness like the light barrier type, so it is better than the latter. The representative manufacturer of this technology is Philips of Europe.
Pointing light source technology
Pointing to the light source 3D technology with two sets of LEDs, with a fast-response LCD panel and driving method, allowing 3D content to enter the viewer's left and right eyes to exchange images to generate parallax, and then make people feel 3D three-dimensional effect. However, pointing to light source 3D technology is still under development and the product is still immature.
Although 3D technology is still immature, there are still many deficiencies in terms of resolution, viewing angle, and viewing distance, and there is still some way to go for the development of naked-eye LED displays.
Throughout the development of display technology, from the flat screen has been developed to three-dimensional 3D screen, which is the biggest breakthrough in display technology development. At present, naked-eye type 3D mainly includes a light barrier type, a lenticular lens technology, a pointing light source, and the like.
Optical barrier technology
The light barrier type 3D technology is implemented by using a switch liquid crystal panel, a polarizing film, and a polymer liquid crystal layer, and a series of vertical stripes with a direction of 90[deg.] are manufactured using the liquid crystal layer and the polarizing film. These stripes are a few tens of micrometers wide, and through their light, they form a vertical thin grating pattern called "parallax barrier." This technology utilizes the parallax barrier placed between the backlight module and the LCD panel. In the stereoscopic display mode, when the image seen by the left eye is displayed on the LCD screen, the opaque stripes will block the right eye. Similarly, When the image that should be seen by the right eye is displayed on the liquid crystal screen, the opaque stripes block the left eye, and the viewer is allowed to see the 3D image by separating the visible screens of the left and right eyes.
The advantage of this technology is that it has advantages in terms of cost. Currently, 3D mobile phones such as Sharp and Nintendo's 3DS game machines use this technology. However, the screen brightness using this technique is low.
Cylindrical lens technology
The lenticular lens technology is also known as the micro-pillar lens 3D technology. Its biggest advantage is that its brightness will not be affected. The principle of the lenticular lens 3D technology is to add a layer of lenticular lenses in front of the liquid crystal display so that the image plane of the liquid crystal screen is located on the focal plane of the lens, so that the pixels of the image under each lens lens are divided into several sub-pixels. This allows the lens to project each subpixel in a different direction. Then the eyes look at the display from different angles and see different sub-pixels.
The lenticular technology does not affect the screen brightness like the light barrier type, so it is better than the latter. The representative manufacturer of this technology is Philips of Europe.
Pointing light source technology
Pointing to the light source 3D technology with two sets of LEDs, with a fast-response LCD panel and driving method, allowing 3D content to enter the viewer's left and right eyes to exchange images to generate parallax, and then make people feel 3D three-dimensional effect. However, pointing to light source 3D technology is still under development and the product is still immature.
Although 3D technology is still immature, there are still many deficiencies in terms of resolution, viewing angle, and viewing distance, and there is still some way to go for the development of naked-eye LED displays.
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