Wiggle stereoscopy (3D without glasses) Technology
Trends of the Wiggle stereoscopy Technology in future
At present, wiggle stereoscopy display has been successfully applied in many fields, but there are many problems such as resolution, visual angle and visual distance.Because the 3D screen flicker is too strong, resulting in too long viewing time, dizziness and other symptoms.In order to guarantee the viewing effect, the viewer's location must be facing the screen, eyes also to maintain the level with the screen.wiggle stereoscopy display screen view can not be like the past 2D screen can be viewed from any angle.
Holographic projection technology can perfectly solve the above two problems.Holographic projection is a kind of 3D technology without the need to wear glasses.Holographic projection device is realized by the digital technology, but the projection device will different angle image projection to a holographic film, so you can't see the other image does not belong to your own point of view, thus realizing the true three-dimensional holographic.
Holographic projection technology has been applied more and more widely.2010 in Shanghai, World Expo, a number of National Museum on the use of holographic projection technology, it is also the magic really feel, bring a new visual experience.People or objects in the distance can be projected into the air in three dimensions.
"Afanda" visual team to the application of this technology in the 2012 Hunan TV New Year concert stage, without the help of 3D glasses, IMAX screen, vividly fantasy scenes appeared on the stage scene.Holographic projection technology is essentially through the air or other special medium to form a three-dimensional image, break through the limitations of sound, light, electricity and other traditional media, image color, contrast, sharpness is very high, a strong sense of space and sense of perspective is the most attractive place technology.Many professionals and scholars agree that holographic projection is expected to exceed the current variety of 3D technology to become the ultimate three-dimensional display solutions.
Development status of Wiggle stereoscopy Technology
At present, the wiggle stereoscopy technology has not been popular, but the relevant technology is maturing.In many 3D systems, the naked eye 3D mainstream technology are: cylindrical lens type; point source technology; multi-layer display; the four visually impaired grating.The wiggle stereoscopy technology in the most popular manufacturers is a cylindrical lens grating type and visually impaired.Also known as the visually impaired grating slit grating type. The basic principle is the use of pinhole imaging principle, through the grating occlusion technology to achieve three-dimensional imaging. On the surface of the screen set called "vertical fence shaped optical grating of the visually impaired barrier" to control the direction of light, let the left and right eyes received different images to generate parallax a stereoscopic display effect, although this technology has the advantages of simple manufacture, is easy to realize, but due to high brightness loss caused by the disadvantage of low resolution.Therefore, the visually impaired grating advantage is compatible with existing LCD LCD technology, controllability in production and cost. The disadvantage is that the brightness of the screen is low, and the resolution will be inversely proportional to the increase of the display image at the same time.
Light barrier 3D technology is also known as parallax barrier or parallax barrier gate technology, the principle and polarization of 3D is more similar, is the European SHARP laboratory engineers more than ten years of research success. Light barrier 3D products compatible with the existing LCD LCD technology, so in the production and cost advantages, but the use of such technology, the image resolution and brightness will decline.
The realization method of the light barrier 3D technology is to use a switch LCD screen, polarizing film and polymer liquid crystal layer, using liquid crystal layer and polarizing film to produce a series of vertical stripes of 90 degrees.
Light barrier (Barrier) technology
The stripe width tens of microns, by their light on the formation of thin gate vertical mode, called "parallax barrier". The technology is the use of the parallax barrier placed in the backlight module and the LCD panel, the stereoscopic display mode, the image should be seen by the left eye display on the LCD panel, opaque stripes will block the right eye; similarly, the right eye to see the image should be displayed on the LCD screen, opaque stripe block left eye, the separation of the visible picture to the left and right eye, make the audience see 3D images.
Advantages: compatible with the existing LCD technology, so the cost
and production advantages.
Disadvantages: screen brightness is low, the resolution will be displayed at the same time with the increase in the image is inversely proportional to the reduction.
Light barrier 3D technology is also known as parallax barrier or parallax barrier gate technology, SHARP researchers have spent ten years in Europe, the final success. It is the main method to realize the use of a switch LCD screen, polarizing film and liquid crystal polymer layer, using a liquid crystal layer and a polarizing film to create a series of direction for vertical stripes of 90 degrees, through which the light on the formation of thin gate vertical mode, called "parallax barrier".
In stereoscopic display mode, display should be left to see the contents, opaque stripes will block the right eye; similarly, the right eye shall see display screen, it will block the left eye, the viewer's left eye and a separate eye screen, to achieve three-dimensional display effect.
But the light barrier type 3D technology is not very mature, although it has many advantages, in the production control and production cost. However, due to its use of sun light, in the display process, would lose much of the brightness and resolution, by this technology, it is difficult for people to enjoy HD 3D screen.
In contrast, cylindrical lens technology is the use of light refraction principle to achieve three-dimensional imaging. By a cylindrical convex lens film is arranged on the surface of the screen, through the lens to control the direction of light, let the left and right eyes received different images to produce parallax stereoscopic effect, compared with slit grating technology, using this technology almost no loss of the brightness of the screen.The advantages and disadvantages of the grating is the opposite, 3D technology shows better results, the brightness is not affected, but not compatible with the existing LCD LCD technology, the need to invest in new equipment and production lines to mass production. For the commercial status of the two technologies, the grating technology complexity is low columnar lens type, the more products currently on the market, including SHARP launched 3D mobile phone, the Nintendo 3DS game machine etc.. But because the parallax barrier technology of stereoscopic display effect and brightness is poor, it is difficult to give consumers the perfect user experience, response is worse than expected.
Cylindrical lens (Lenticular Lens) technology is also known as a lenticular lens or micro cylindrical lens 3D technology, its biggest advantage is its brightness is not affected. The principle of lenticular lens 3D technology is in front of the LCD screen with a layer of cylindrical lens, the LCD screen as the focal plane is located on the side of a lens, the image below each column lens pixel is divided into several sub pixels, this lens can in a different direction of projection of each sub pixel. So the eyes from different angles to watch the screen, you can see different sub pixels. However, the gap between the pixels will be enlarged, and therefore can not be simply superimposed sub pixels. The column lens is not parallel to the pixel column, but to a certain angle. In this way, each group of pixels can be repeatedly projected into the visual area, rather than just a set of parallax images.
Cylindrical lens (Lenticular Lens) technology
The reason why it is not affected by the brightness, because the cylindrical lens does not block the backlight, so the screen brightness can be well protected. But because of its 3D display principle still have different approaches but equally satisfactory results and parallax barrier technology, so the resolution is still a difficult problem.
Advantages: 3D technology shows better results, the brightness is not affected.
Disadvantages: related manufacturing is not compatible with the existing LCD technology, the need to invest in new equipment and production lines.
Cylindrical lens (Lenticular Lens) technology is also known as a lenticular lens or micro cylindrical lens 3D technology, it implements the principle in front of liquid crystal display with a layer of columnar lens, let the LCD screen image display flat plane and convex combination of pixels in each of the following image by cylindrical lens is divided into several sub pixels, so it can be like a different sub pixel projection direction. When the audience is watching the display screen, because of the different angles of the eyes, the different pictures of different pixel points are received, and the effect of 3D is generated. Of course, this stack is not a simple superposition, due to the difference of the angle, this stack will produce a certain angle.
Cylindrical lens technique
Cylindrical lens technology relative to the light barrier display technology, in brightness, will not cause losses, so that viewers can enjoy this technology, the real high brightness 3D content. However, due to the same, and light barrier in principle. So, when shown, will still lose much of the resolution, the viewer is still not able to enjoy high-definition 3D display. Furthermore, cylindrical lens technology is not compatible with the existing LCD manufacturing process, so the production cost is very high, it is very difficult to popularize.
Pointing to the light source (Directional Backlight) technology
The point light source (Directional Backlight) 3D technology is the realization of collocation through two groups of LED, with the LCD panel and driving method of rapid response, let 3D content into the viewer's eye to sort, as the swap image generating parallax, then let the human feel 3D 3D effect. 3M is a big investment in this technology, the use of this technology products, in the absence of wearing glasses, the real 3D effect.
3D technology principle of light source
Compared with the previous two technologies, this technology has a great advantage in the 3D display brightness and resolution can be guaranteed. Through this technology, people can really enjoy the real HD 3D experience. It is worth mentioning that this kind of 3D technology can also be applied in the mobile handheld devices, through the phone, MP4, etc., will be able to enjoy the real 3D effect. However, unfortunately, this technology is still immature, far from the stage of mass production.
Other naked eye 3D Technology
MLD naked eye 3D display
In fact, 3D technology, far more than these 3 technologies, but also, in effect, other technologies will not be inferior, and some can even get a better amount of display. Like the American PureDepth company MLD (multi-layer display multi display technology, 3D display) in effect, it is very good, people can not be in the loss of resolution of the case through it, to enjoy the best display effect 3D.
3D Baolong Eurasian naked eye products
Not only in foreign countries, in fact, the domestic display technology, is commendable, the most famous is the Eurasian Baolong company, its use is BOLOD Naked-eye 3D display technology, and has developed to the fourth generation, the production of all products to achieve a high-definition display. This is where we are very proud.