Since the release of Avatar in 2009, 3D display technology has been rapidly developed and rapidly expanded from theater 3D projection to display devices such as TVs and LED displays, which once caused a sensation in the LED display industry. But these years has been the development of low-key, until 2020, a number of 3D display cases quickly become popular ……
The burst of red outdoor 3D display, once again came to the spotlight of the industry and the community, especially the various links of the industry chain, for outdoor naked eye 3D LED display and conventional LED display, the differences in software and hardware and special requirements are extremely concerned.
What is a naked eye 3D LED display? From which dimensions to measure its good or bad?
3D mode has two kinds of passive 3D display and active 3D display. Traditional naked eye 3D display viewers, the left and right eyes see the video content with a certain visual difference, forming a 3D effect, the current popular multiple naked eye 3D display cases, is through the display installation scene, combined with the production of creative content to form an immersive experience, not the traditional sense of naked eye 3D display. We believe that the current naked eye 3D display effect, need from the display product display effect, installation scene, and the combination of creative content to evaluate the 3D display effect.
Naked eye 3D display first appeared in LCD display technology, through the lenticular or slit way to form multiple viewpoints, to ensure that the viewer in any external viewing, the left and right eyes have visual differences, so as to form a naked eye 3D display effect. Lazard launched the naked eye 3D LED display based on LED small pitch very early and applied in many exhibition and display projects. The current popular naked eye 3D display, accurately described as “display with naked eye 3D effect”, its essence or 2D LED display with special production of 2D video content, the formation of naked eye 3D effect. “Red” is a good illustration of the display device viewing effect is the need for the perfect combination of hardware and content.
Naked eye 3D is a kind of interactive sense of space and stereo without the need to wear glasses, naked eye 3D can be judged from the viewing distance and content of two dimensions. In different installation environments, the display point spacing determines the audience’s viewing angle and viewing distance, the higher the clarity of the content, you can display more video content; in addition, the design of the content is also very critical, according to the display “customized” naked eye parallax video, more immersive interactive sense of the audience.
At this stage of the LED screen to achieve naked eye 3D, in fact, most of the two-dimensional picture with the object’s distance, size, shadow effects, perspective relationship to build a three-dimensional effect. A debut on the stunning network of the SM building 3D wave screen on the use of the background shadows as a static three-dimensional reference line, so that the moving waves have a sense of breaking through the screen. That is, the display screen will be folded 90 °, the use of video material in line with the principle of perspective, the left screen to display the left view of the image, the right screen to display the main view of the image, when people stand in front of the corner to watch, then see the side and front of the object at the same time, presenting a realistic three-dimensional effect. However, this seemingly stunning display effect, behind the countless technical polishing and strong product support.
Naked-eye 3D display is to add some optical structures on the display, so that the image presented into the left and right eyes respectively to produce parallax, in the case of not wearing any special glasses or other devices can see the 3D picture. There are two types of naked eye 3D display technology: one is the Parallax Barrier, which uses straight stripes distributed at intervals between translucent and opaque (black) to restrict the direction of light travel, thus allowing the image message to produce a parallax effect; and the other is the Lenticular Lens, which uses the focusing and refraction technology of the Lenticular Lens to change the direction of light travel and split the light. The other is the Lenticular Lens, which uses the focusing and refraction techniques of the Lenticular Lens to change the direction of light travel to split the light, thus allowing the image message to produce a parallax effect. The common disadvantage of both technologies is that the resolution is halved, so the LED lights need to be doubled, and the parallax barrier technology will reduce the brightness of the stereoscopic display screen; therefore, the outdoor naked eye 3D display medium is most suitable for the use of LED small pitch display.
What are the differences/difficulties in software and hardware of outdoor 3D LED display compared to conventional LED display?
Our conventional display for the flat two-dimensional, 2D and 3D content will not have a three-dimensional sense, now using a 90 ° right angle of the arc installation, to achieve a non-two-dimensional display surface, the arc of this part of the product (PCB, module, case) are custom development products.
Play the video content, are customized with the display resolution, the price is higher.
Naked eye 3D LED display to present the best display effect, in the software should be will need to support high-definition, high color depth of the video encoding, and can adapt to play on polygonal or curved and other atypical screen body. In terms of hardware, the naked eye 3D LED display emphasizes more detailed images, so the display has higher requirements in grayscale, refresh and frame rate.
Compared with traditional LED screens, in order to achieve a better naked-eye 3D experience, naked-eye 3D LED screens require higher hardware and software configurations, product specifications and design requirements. This is mainly reflected in several aspects.
1) Content design and creativity that can produce parallax.
2) the integration of display color and ambient light.
3) the integration of LED display installation structure and installation scene.
In hardware: naked eye 3D LED display compared to traditional products, pay more attention to high refresh, high gray scale, high dynamic contrast, as well as curved / corner smooth transition; in addition, the playback server needs to be connected to a professional graphics workstation, as well as the configuration of multi-graphics frame synchronization card; in software: more professional decoder is needed, the decoder must be able to support the material mapping and correction function of the shaped display carrier, and support High bit-stream decoding underlying optimization; playback material: there are also certain requirements, the selected main perspective needs to be based on the perspective relationship of the display modeling to do three-dimensional construction, resolution point-to-point customization, to ensure the best display effect, the recommended use of HAP format; technical progress level: in recent years, in addition to hardware and software with progress, mainly the production level of the material has also played a greater role, the current video manufacturing are in accordance with The production of video is now polished according to the requirements of the boutique. In addition, the art of structural modeling, also makes no longer limited to the traditional flat screen, with more imagination space.
In order to achieve a better display effect, the hardware of the display needs to achieve a better contrast ratio and HDR high dynamic range, which are two important directions. For example, in the micro pitch products, Lazard’s Micro LED, the contrast ratio is greatly improved and can support the highest order of HDR capability, providing a higher dynamic range, which can express the dark and bright details to the fullest. Viewers enjoy the content to achieve the effect of an immersive experience with a landscape in their eyes without a screen.
What are the new requirements of outdoor 3D LED display for each link of the industry chain?
Mainly brightness and drive IC, at present, naked eye 3D mostly SMD outdoor P2.5-P8 products, in the daytime ambient light (especially at noon) is relatively high, LED display brightness needs to meet ≥ 6000, in order to ensure normal viewing. And at night, the display should be reduced accordingly with the ambient brightness, this time the driver IC is more critical, if you use the conventional IC, the brightness adjustment is achieved with over loss of gray, the display screen effect will be discounted, this is not desirable, so we must use PWM driver IC with current gain when doing naked eye 3D, this can ensure the best picture quality, while It can also ensure that the audience will not be under refreshed when shooting.
To achieve the shocking 3D display effect, it does have high requirements for the display screen hardware of high refresh, high gray scale, high dynamic contrast ratio, smooth transition of curved surfaces / corners, video material production level, etc., which requires a stable display device with superior color performance as support.
From the perspective of LED display manufacturers, indicators and differentiation is still mainly reflected in the core control system of LED display, LED display product design links. The main challenge lies in the LED display display effect as well as high performance, including IC, LED display control system, broadcast control software and creative content design.
From the perspective of LED display driver chip, outdoor 3D LED display whether day and night will be a hot spot to attract people’s eyes as well as camera shooting, so the hardware configuration should be paired with a driver chip that supports high gray scale with excellent very low gray, 3,840 Hz high refresh rate, HDR high dynamic contrast ratio and low power consumption to present realistic and shocking 3D anthropomorphic images.
In order to achieve a more perfect effect of outdoor naked eye 3D, the LED display needs to meet higher requirements, and its display control system needs to be able to support higher resolution and integrate better picture quality enhancement technology.
Compared to ordinary LED screens, is there any significant difference in the cost or selling price of outdoor naked eye 3D screens?
Compared with ordinary LED display, naked eye 3D screen needs to adapt to specific installation scenarios, there are some features of custom development, the corresponding cost or selling price will be increased, the goal is to provide customers with the perfect solution and the best viewing experience.
Compared with ordinary display, the difference on the driver IC is slightly more obvious, about 3%-5%.
The increase in hardware specifications should have an impact on the cost or price of 3D screens. It also depends on the location of the application device and the creative content being played.
The trend of outdoor naked eye 3D LED screen
Outdoor LED screen single screen area is larger, pixel density is greater, the overall effect is more shocking, the image details are clearer, the current content display mostly in the form of Netflix card blogging, but the follow-up will be commercialized to add support, reflecting higher value.
Outdoor naked eye 3D LED display can be described as a set of ultimate combination of display technology and installation art, providing a novel visual experience while capturing the audience’s attention, and moreover creating a topic on the network social media. In the future, LED displays should develop towards smaller pitch, higher definition images and more diverse screen shapes, and integrate with other public art and even natural landscapes.
Naked eye 3D is a new business application that brings traditional single outdoor media into a new era. Video media displays with naked eye 3D give users an immersive sense of interaction, which can attract more viewers and multiply the communication effect of advertising.
Outdoor display with naked eye 3D to achieve such a hot dissemination effect, can be expected in the future will emerge more outstanding cases. And with the development of technology and cost reduction, can imagine the future of LED display will no longer rely only on 3D video effects and multi-surface screen, but directly use the parallax effect of the screen hardware can present a more detailed real naked eye 3D image.
Combining new technologies, new application scenarios and creative content is the trend of the development of naked eye 3D LED screens. Naked eye 3D LED display can be combined with AR, VR and holographic technology to achieve two-way interactive naked eye 3D LED display applications. Naked eye 3D LED display combined with stage and lighting to create a sense of space and immersive visual experience, giving the audience a strong visual impact.