From the first generation of black and white TVs to the current smart TVs, whether it is display technology or hardware and software design, the color TV industry is developing at an unprecedented speed.
Quantum dot display technology has been a boom in the past two years. With the layout of color TV manufacturers led by TCL and Samsung, the flagship high-end series of TV products have been positioned. Quantum dot display technology has broken the cost and color with its unique luminous display principle. The contradiction between domain and brightness, Professor Peng Xiaogang also said that "quantum dots may be the best luminescent materials discovered by humans in history."
Quantum dot display is a display technology based on high-tech materials excited by chemical methods at the atomic and molecular level. According to the stimulation of the quantum dots by electric or light, the diameter is changed to produce high-quality monochrome of various colors. Light, the quantum dot size is continuously adjustable, enabling blue to green, yellow, orange, and red emission, so the color is accurate and pure.
A new generation of inorganic three-primary quantum dot display materials, which is only one-tenth of the volume of organic luminescent materials, achieves a breakthrough in color processing from micron to nanometer. The advantages of a new generation of quantum dots can be summarized as "high, pure, long". “High†means high color gamut and gamut coverage of 110% NTSC; “pure†means pure color, color purity is about 58.3% higher than ordinary LED, and it accurately displays natural color; “long†is color for a long time, new generation Ultra-thin quantum dots are stable inorganic nanomaterials that ensure long-lasting color without fading and lasting up to 60,000 hours.
OLED display technologyThe OLED's characteristics are self-illuminating and do not require a backlight. Therefore, its black field performance is pure. The pure black field display promoted by its organic display can be said to bring a very good visual experience. The OLED panel is not only suitable for mobile phones, televisions, Recently, the emerging wearable technology products are also very suitable. OLED TV brands mainly include LG, Skyworth, Sony and other brands. With its ultra-thin, flexible and even foldable features, its foreground applications are consistently optimistic.
There are 7 advantages:
1 Black field performance is good, because it is self-illuminating, so when the black scene is presented, there is no backlight, which can achieve very pure black;
2 ultra-thin and ultra-light, OLED panel thickness can be less than 1 mm, only 1/3 of the LCD screen, and the weight is also lighter;
3 good shock resistance, OLED is a solid state mechanism, no liquid material, so the seismic performance is better;
4 The range of viewing angle is large, the fidelity is good, and there is almost no problem of viewing angle. Even when viewed under a large viewing angle, the picture is still not distorted;
5 Responsive, the response time is one thousandth of the LCD, showing that there is absolutely no smear in the moving picture;
6 low temperature characteristics, can still display normally at minus 40 degrees, and LCD can not do;
7 It is manufacturable and can be manufactured on substrates of different materials, and can be made into a flexible display that can be bent.
The shortcoming is that the vacuum plating process (mainly equipment input and material loss) leads to high cost, and the TV products with poor workmanship still have problems such as afterimages. The high price and the problem of the OLED panel itself make the OLED TV still It is not universal, but it does not hinder everyone's confidence in representing the future direction of television.
Comparison of OLED and quantum dot display technologyOLEDs and quantum dots can be said to be two camps. In the past year, OLEDs have a relatively small overall capacity of less than 2 million. Quantum dot TVs are not limited by this capacity and scale. The amount is very easy, and quantum dots The advantage is that the color is very bright, the color gamut is larger than the OLED. For example, if the color gamut standard of Hollywood DCI is taken as an example, the OLED can only achieve more than 80%, and the quantum dot can achieve more than 95%, so its color The domain is more than OLED. In addition, quantum dot screens now include manufacturing and processing processes are relatively easy. OLEDs are slow to develop due to limitations in yield and productivity. In addition, quantum dots are an inorganic material. This material is a very high quality material and is more stable. Life expectancy will be longer. Therefore, from the trend point of view, quantum dot TV is the long-term development direction in the future. Quantum dot TV may not completely replace OLED TV. It may develop in parallel, but quantum dots will develop faster because of its productivity and manufacturing cost. It will be better than OLED.
4000R curved screenAccording to data from Aowei.com, the proportion of China's curved TV market reached 8.5% in 2017. Curved TV will become one of the most popular TVs in the world. The 4000R curvature screen is the most widely used in the market. The 4000R curvature screen has the same curvature as the curvature of the human eye, so the image can be intuitively accepted and processed by the brain, reducing brain pressure and visual fatigue, and viewing healthier and more comfortable.
The 4000R curvature screen offers three major advantages:
1 can bring the cinema scene effect, mainly in the field of view (FOV) of the curved TV, the same size flat TV and curved TV, standing in the same position to watch, the wide view of the curved TV will make people feel the picture is bigger, Immerse the audience.
2 curved TV can improve the overall picture quality compared to flat TV, which is reflected in the same viewing distance, the screen of each surface of the curved TV can provide better brightness and chromaticity. The viewing distance between the center of the flat TV and the side is much different, and the viewing distance between the center of the curved TV and the side is small.
3 From the human eye structure, the plane object will be distorted when it is reflected on the curved surface of the retina. The picture played on the curved TV is reflected in the curved surface of the retina, which is a complete planar shape, so the picture distortion is relatively small.
HDR high dynamic display technologyWith the popularity of the ultra-high-definition Blu-ray standard, HDR display technology from film source, decoding to full-screen ecology has become popular. 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 realistic, and the color gamut of the picture is thus enlarged, giving the user a visual impact.
The difference between Dolby Vision and HDR10:
Currently, HDR has two standards, Dolby Vision and HDR10. The general TV on the market has HDR10, and the high-end flagship product is compatible with Dolby Vision and HDR10. Dolby Vision is a complete set of patented solutions. The content, source and display device must be Compatible with the Dolby Vision standard, and each Dolby Vision display device comes with a dedicated chip to detect the output capability (brightness, color space, etc.) of the device and transfer it to Dolby Vision's playback source during playback. The signal source will optimize the output frame by frame according to the data of these display devices, which not only takes into account the display device capabilities, but also maintains the original signal expression intention; HDR10 is Samsung, SONY, LG and other home appliance manufacturers hope to have a more than Dolby A more open platform saves money on Dolby's royalty without having to add a process to submit certifications to weaken control over their products, so they began to develop their own HDR video solution, which eventually evolved into a standard, HDR10. HDR10 is built on the same core technology features as Dolby Vision. It has similar brightness, color and other parameters to the Dolby standard, but HDR10 only supports 10bit color depth and Dolby is up to 12-bit.
HDR technology can bring two advantages:
1 Let you feel more "bright" through TV. The backlight panel of HDR TV panel generally has relatively large lumen parameters, because LCD panel TV can do brighter than OLED, OLED panel has no backlight system, so both in HDR There are different standards under the standard - the brightness dynamic range of the LCD is above 1000 nits / the black level is below 0.05 nits, and the brightness dynamic range of the OLED is above 540 nits / the black level is below 0.0005 nits. By increasing the brightness, the contrast can be greatly improved, and the contrast between light and dark in the scene becomes more obvious, effectively improving the image quality effect;
2 Lets you experience a wider range of colors through TV. HDR TV and HDR video content is based on the 10-bit or 12-bit BT.2020 color space. It is a traditional BT. 60 times the 709 color space and more than 1 billion colors, this enhancement plays a key role in the enhancement of color and transition in the entire image, such as high-density orange and dark green.
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