On March 9th, at the China Household Electrical Appliances and Consumer Electronics Expo (AWE) held in Shanghai, Hisense carried ULED through to the end and released the 2017 TV picture quality benchmark, the 75-inch Scorpion Series ULED super-quality TV. Why does Hisense have a soft spot for ULED? What are the secrets of Hisense ULED backlight? In the AWE, Wanwei Home Grid had the privilege of interviewing Mr. Yang Jia, Hisense ULED technical director, to explore the story behind ULED.
Mr. Yang Jia, Chief Technical Officer of Hisense ULED
"TV is pursuing reality. TV is like a window through which users can see a more real world."
Yang Jia said that for watching television, all the pictures are presented by two elements: one is light and the other is color. Among them, ULED can obtain more accurate backlight, and quantum dots are a very good color gamut enhancement technology. The color gamut is planar and the brightness is deep. The combination of the two can better enhance the three-dimensional color space and achieve a more realistic Screen effect. Hisense TV series ULED super-quality TV formally gathered the advantages of these two points, became the benchmark product of 2017 LCD TV picture quality, and is another milestone product of Hisense's promotion of LCD display technology upgrade.
In addition, during the development of LCD TVs along the final quantum dots, ULED and quantum dots are not complementary at every stage. At this stage, ULED technology owners and quantum dots are complementary, and when it develops into the era of quantum dots Quantum dot technology may dominate, ULED will also get some inheritance, but the proportion will decline.
In addition, this "window" is not only more and more real, but also larger and larger, and the big screen has become an absolute trend.
Yang Jia thinks there are two main reasons for this. The first is the high-definition of signal content. Today, both the definition of high-definition wired signals and the definition of online video have greatly improved, satisfying the needs of users to watch high-definition; second is The signal processing ability of the TV itself has become stronger and stronger, and the resolution/contrast of the display device has become higher and higher. In the past, if you look at the LCD TV, if you are too close, the screen will have graininess and other problems, and now you have A lot of improvements have been made, and the big screen can also bring about better immersion.
For a 75-inch TV, Yang Jia also gives a formula: 3 times the height of the TV. If it is a 4K TV, divide it by 2. The height of the 75-inch LCD TV is about 1 meter. It is an FHD TV. The viewing distance is 3 meters, and the viewing distance of a 4K 75-inch LCD TV is about 1.5 meters.
Of course, ULED is also in the continuous upgrading of the user to get a more realistic picture, Yang Jia said ULED will do better in two areas in the future, the first is ULED to do more partitions, only a more detailed partition, The display will be more perfect; the second is slimming, the future ULED TV will become thinner and thinner.
For increasing the number of backlight partitions, Yang Jia believes that the most difficult problem is a trade-off problem. For example, if there are more partitions and high brightness, there will be problems with large heat and power, and product reliability will decline. The major color TV companies are Differences in zoning control are often reflected in these places. Hisense’s advantage is the development of the entire LCD backlight control technology over the years. It is well aware of the design and cost control of the LCD. Hisense also achieved a leading position in TV backlight control.
For OLED TVs, Yang Jia thinks that either white OLEDs or RGB OLEDs have fatal problems at this stage.
RGB OLED performance is good, but the large-screen yield is too low, which is why Samsung gave up large-screen OLED, and the main reason for the small-screen OLED.
The problem with the white light OLED is that it is because of the addition of a layer of color filter film, there are a lot of light film to block, so the light efficiency of the OLED TV will drop, if you want to achieve high brightness, then the power consumption will be particularly large The life will be greatly reduced; but if you control the power consumption, then the brightness will inevitably not be too high, which is why everyone sees white light OLED TVs do no problem, but it is difficult to do bright.
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