The naked-eye 3D TV displays the content of the image in a "panoramic image mode" in which a lenticular lens is disposed in front of the liquid crystal panel, and the existing 2D image and 3D image (two parallaxes of the left eye and the right eye) can be converted into 9-parallax images by image processing. . From the technical classification point of view, the current naked eye 3D is mainly divided into three types: light barrier type, lenticular lens and pointing light source.
1, light barrier type (Barrier)
Light barrier 3D technology, also known as parallax barrier or parallax barrier technology, is similar in principle to polarized 3D and has been successfully researched by Sharp's European laboratory engineers for more than a decade. The light barrier type 3D product is compatible with the existing LCD liquid crystal process, so it is advantageous in terms of mass production and cost, but the image resolution and brightness of the product using this technology will decrease.
The light barrier type 3D technology is realized by using a switch liquid crystal panel, a polarizing film and a polymer liquid crystal layer, and using the liquid crystal layer and the polarizing film to produce a series of vertical stripes with a direction of 90°.
These stripes are several tens of micrometers wide, and their light forms a vertical thin-gate pattern called a "parallax barrier." The technology utilizes a parallax barrier disposed between the backlight module and the LCD panel. In the stereoscopic display mode, when the image that should be seen by the left eye is displayed on the liquid crystal screen, the opaque stripes may block the right eye.
Similarly, when the image that should be seen by the right eye is displayed on the LCD screen, the opaque stripes will block the left eye, and the viewer can see the 3D image by separating the visible images of the left and right eyes.
2, Lenticular Lens technology
The Lenticular Lens technology, also known as lenticular or microcolumn lens 3D technology, has the greatest advantage that its brightness is not affected. The principle of the lenticular lens 3D technology is to add a lenticular lens to the front of the liquid crystal display so that the image plane of the liquid crystal panel is located on the focal plane of the lens, so that the pixels of the image under each cylindrical lens are divided into several sub-pixels. This allows the lens to project each sub-pixel in a different direction.
Then the eyes look at the display from different angles and see different sub-pixels. However, the gap between pixels is also amplified, so the sub-pixels cannot be simply superimposed. Let the cylindrical lens be parallel to the pixel column, but at an angle. This allows each set of sub-pixels to be repeatedly projected into the viewport instead of just projecting a set of disparity images.
The reason why its brightness is not affected is because the lenticular lens does not block the backlight, so the brightness of the picture can be well protected. However, since its basic principle of 3D display is still similar to the parallax barrier technology, resolution is still a difficult problem to solve.
3, directed light source (Directional Backlight) technology
Mainly invested in Directional Backlight 3D technology, 3M Company, Directional Backlight 3D technology with two sets of LEDs, with fast response LCD panel and driving method, to make 3D content sorted. The way to enter the viewer's left and right eye interchangeable images produces parallax, which in turn makes people feel the 3D three-dimensional effect.
The 3D industry is facing a revolution. As a technical media person, it is really a painful feeling to see such a phenomenon. We can't sit down and watch the third time the development of the 3D industry is a good time to die again. As the saying goes, "There is no more than three things." It is time for the 3D industry to make great achievements. We must set off the banner of "healthy 3D" at this time, shake the flag and shout, save the 3D market that is on the verge of fever, and advocate healthy 3D. Consumption knowledge, standardizing a healthy 3D industrial environment, and scientifically recommending healthy 3D consumer products, creating a healthy and sustainable 3D consumer and industrial development environment for China and the world, and promoting 3D practitioners to respect human health and humanity mechanisms. Under the premise, vigorously research and development and promotion of 3D consumer electronics, 3D video content and 3D convergence applications and other related 3D technology products and services.
1, people are tired
The current naked-eye 3D TV, it is easy to cause fatigue or even discomfort when watching for a long time. This is the biggest technical difficulty that needs to be overcome.
2, the viewing angle is small
Another fatal flaw in naked-eye 3D TV is the viewing angle problem. Generally, the viewing angle is only two to three. If you look at it, the image will appear blurred. "If a family of four or five people are watching TV, there will be many viewpoints. So with so many different viewpoints, there is a big problem with naked-eye 3D TV."
3, the lack of source is scarce
At present, the problem of insufficient 3D source is still unresolved. Domestic TV stations have few 3D channels and programs are very limited. Compared to ordinary 3D, the source content of the naked eye 3D is more complicated. Moreover, the naked eye 3D depends largely on the production of the content, and the presentation of the source determines whether the image is displayed on the TV as 2D, 3D or naked eye 3D.
VR, AR and Blink 3D can be said to be one of the hottest areas nowadays, but the most practical problem is that there are not many resources at present, and the problem of technical defects has become the biggest factor hindering its development, and resources. The layout with the application is the biggest problem that affects the popularity of technology. With the increasing use of LED displays, people are increasingly demanding them. Now people can't satisfy the two-dimensional flat display, and they hope to truly restore the real-world three-dimensional information. Therefore, 3D display technology is The application scheme on the LED display has become a hot spot and direction in recent years.
Since the beginning of 2013, the rise of this technology has caused a sensation in the LED display industry. Compared with the traditional 3D display, the naked-eye 3D LED display is a stereoscopic 3D effect that can be viewed by the naked eye without wearing professional glasses. In fact, as early as 2011, naked-eye 3D products have already appeared in the market. Manufacturers producing naked-eye 3D devices have begun to introduce some conceptual products, but due to technical limitations, the momentum has gradually faded, even after many years. The application of naked eye 3D technology in LED display screens is still highly anticipated.
At present, VR, AR and Blink 3D are all hotspots in the current display field, but the actual application resources are not many. The problem of technical defects only limits the biggest factor of its development, and the layout of resources and applications is only It is the biggest problem that affects the popularity of technology. First of all, the market is not fully aware of naked-eye 3D LEDs. Second, the price is too high. It is understood that the hardware cost of the naked-eye 3D LED display is quite cheap, mainly because the playback software restricts the development, and the grating is added on the LED screen, and the cost of the grating is only about 100 yuan.
The lack of naked-eye 3D LED display content services is also a major factor. The demand for content for naked-eye 3D LEDs is different from that of traditional 2D LED displays. Specially-designed content is required. Traditional LED display players do not have the ability to use software and content. Customers can buy back naked-eye 3D LED displays. use. In short, like VR products, resource applications are still a flaw in this technology. Unlike VR, VR vendors have begun their strategy of resource allocation, while naked-eye 3D technology is “untimelyâ€. .
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