From the first generation of black and white TV to the current smart TV, whether it is display technology or hardware and software design, the color TV industry is developing at an unprecedented speed.
In the past two years, quantum dot display technology can be described as unprecedented. Under the layout of color TV manufacturers led by TCL and Samsung, the flagship high-end series TV products are positioned. Quantum dot display technology breaks the cost and color with its unique light-emitting display principle The contradiction between the domain and the brightness, the scientist Professor Peng Xiaogang once said that "quantum dots may be the most excellent luminescent material ever discovered by mankind."
Quantum dot display is a display technology excited by high-tech materials that are reconstructed at the atomic and molecular levels from chemical methods. According to the stimulation of electricity or light, the diameter of the quantum dot changes its size, thereby emitting various high-quality monochromes of different colors The size of light and quantum dots are continuously adjustable, which can achieve blue to green, yellow, orange, and red emission, so the color is accurate and pure.
The new generation of inorganic three-primary color quantum dot display materials, the volume is only one ten thousandth of the organic light-emitting materials, to achieve color processing from micron to nanoscale breakthrough. The advantages of the new generation of quantum dots can be summarized as "high, pure, and long". "High" means high color gamut, with a color gamut coverage of 110% NTSC; "Pure" means pure color, the color purity is improved by about 58.3% compared to ordinary LEDs, and accurately displays natural colors; "Long" means long color, a new generation Ultra-thin quantum dots are stable inorganic nanomaterials, which can ensure the color does not fade for a long time, and the color can last for 60,000 hours.
OLED display technologyThe characteristic of OLED is self-luminous and does not require a backlight, so its black field performance is pure. The pure black field display driven by its organic display can be said to bring a very good visual experience. OLED panels are not only suitable for mobile phones, TVs, Wearable technology products that have recently emerged are also very suitable. OLED TV brands mainly include LG, Skyworth, Sony and other brands. With their ultra-thin, flexible, and even foldable features, their prospects are unanimously optimistic.
There are 7 advantages:
â‘ The black field performs well, because it is self-illuminating, so it does not need backlight when presenting a black scene, and can achieve very pure black;
â‘¡Ultra-thin and ultra-light, the thickness of the OLED panel can be less than 1 mm, only 1/3 of the LCD screen, and the weight is also lighter;
â‘¢Good shock resistance, OLED is a solid-state mechanism, there is no liquid substance, so the shock resistance is better;
â‘£The viewable angle range is large, the fidelity is good, and there is almost no problem with the viewing angle. Even if viewed at a large angle of view, the picture is still not distorted;
⑤Responsive, the response time is one-thousandth of the LCD, and there will be no smearing phenomenon when displaying the moving picture;
â‘¥ The low temperature characteristic is good, it can still display normally at minus 40 degrees, but the LCD cannot do it;
⑦ Strong manufacturability, which can be manufactured on substrates of different materials, and can be made into a flexible and flexible display screen.
The disadvantage is that the vacuum vacuum plating process (mainly equipment investment and material loss) results in high cost and poor workmanship. There are still problems such as afterimages. The high price and the problems of the OLED panel make OLED TVs currently still There is no popularity, but it does not hinder everyone's confidence that they represent the future direction of television.
OLED and quantum dot display technology comparisonOLED and quantum dots can be said to be two camps. In the past year, the overall production capacity of OLED is relatively small, less than 2 million. Quantum dot TVs are not limited by this production capacity and scale. It is easy to increase the amount of quantum dots. The advantage is that the color is very bright, and the color gamut range is larger than OLED. For example, taking the DCI color gamut standard in Hollywood as an example, currently OLED can only achieve more than 80%, and quantum dots can achieve more than 95%, so its color The domain is more than OLED. In addition, the quantum dot screen is relatively easy to manufacture and process. OLED is slow to develop due to yield and capacity constraints. In addition, quantum dots are an inorganic material. This material is a very high-quality material and is more stable. Life will be longer. Therefore, from the trend point of view, quantum dot TV is the direction of long-term development in the future. Quantum dot TV may not completely replace OLED TV. It may develop in parallel, but quantum dot will develop faster because of its production capacity and yield of manufacturing costs. Will be better than OLED.
4000R curved screenAccording to data from Aoweiyun.com, China's curved TV market accounted for 8.5% in 2017, and curved TVs will become one of the most popular TVs in the world, of which the 4000R curvature screen is the most extensive. The 4000R curvature screen has a curvature characteristic that is the same as the curvature of the human eyeball, so the image can be intuitively accepted and processed by the brain, reducing brain pressure and visual fatigue, and making it healthier and more comfortable to watch.
The 4000R curvature screen can bring three advantages:
â‘ It can bring the on-site effect of the theater, mainly due to the angle of view (FOV) of the curved TV. The flat TV and the curved TV of the same size stand at the same position to watch. The wide field of view of the curved TV will make people feel bigger. Immerse the audience.
â‘¡The curved TV can improve the overall picture quality compared to the flat TV. This is reflected in the same viewing distance. Every screen of the curved TV can provide better brightness and chroma. The viewing distance between the center and side of a flat-screen TV is much different, while the viewing distance between the center and side of a curved TV is small.
â‘¢ Starting from the structure of human eyeballs, flat objects will be distorted when reflected on the curved retina, and the picture played on the curved TV will be a complete flat form when reflected on the curved retina, so the picture distortion is relatively small.
HDR high dynamic display technologyWith the popularity of the ultra-high-definition Blu-ray standard, the HDR display technology from film source and decoding to the entire screen has become popular, and TV is the most important part of this, the picture is more realistic and natural, the brightest and darkest picture The contrast is more distinct, the objects in the picture are more real, and the color gamut of the picture is expanded, which brings visual impact to the user.
The difference between Dolby Vision and HDR10:
At present, there are two standards for HDR, Dolby Vision and HDR10. General TVs on the market have HDR10, and high-end flagship products are compatible with Dolby Vision and HDR10. Dolby Vision is a complete set of patented solutions. The content, playback source, and display device must be Only compatible with the Dolby Vision standard, and each Dolby Vision display device is equipped with a dedicated chip to detect and confirm the output capability (brightness, color space, etc.) of the device, and these data are transmitted to the Dolby Vision playback signal source during playback , The signal source will optimize the output frame by frame based on the data of these display devices, both taking into account the capabilities of the display device, and maintaining the original signal expression intention; HDR10 is Samsung, SONY, LG and other home appliance manufacturers hope to have a better than Dolby A more open platform saves Dolby's patent fees, and there is no need to add a certification submission process to weaken the control of their own products, so they began to develop their own solutions for HDR video, which eventually evolved into a standard-HDR10. HDR10 is built on the same core technical functions as Dolby Vision. It is similar to Dolby standard in brightness, color and other parameters, but HDR10 only supports 10-bit color depth, and Dolby is up to 12-bit.
HDR technology can bring two advantages:
â‘ Let you feel more "bright" through the TV, the backlight panel of the HDR TV panel generally has a larger lumen parameter, because the LCD panel TV can do brighter than the OLED, and the OLED panel has no backlight system, so the two are in HDR There are different standards under the standard-the dynamic range of brightness of LCD is above 1000nits / black level is less than 0.05nits, and the dynamic range of brightness of OLED is above 540nits / black level is less than 0.0005nits. By increasing the brightness, the contrast can be greatly improved, and the contrast between the light and dark in the scene becomes more obvious, effectively improving the picture quality effect;
â‘¡Let you feel the wider colors through the TV. The HDR TV and HDR video content is based on the 10-bit or 12-bit BT.2020 color space to establish standards, which is traditional BT. 60 times the 709 color space, with more than 1 billion colors. This improvement has played a key role in enhancing the color gradation and transition of the entire image. For example, it can display high-density orange and dark green.
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