Ruifeng photoelectric officially get American GE company KSF in 2016.6.27 phosphors application patent authorization, became the first company KSF phosphor application patent authorized local packaging companies, triggered a strong focus on the industry. The patent license for the KSF phosphors application patent licenses, in the field of liquid crystal display with this authorization, ruifeng will be able to provide the global customers KSF phosphors back light LED products without having to worry about any patent problems.
Let's say what is KSF. KSF is the chemical formula K2SiF6: Mn4 +, can be called in Chinese (including quadrivalence mn ions) potassium fluosilicate, packaging industry also often call on fluoride phosphors. Technically, the KSF refers to contain A2 (MF6) : Mn4 + structured formula of A type of compound, which is A Li, Na, K, Rb, Cs, A kind of NH4, yes m. Ge, Si, Sn, Ti, Zr element A, or combinations of elements. KSF phosphor powder is a kind of red phosphors, it is the main characteristics of the emission spectrum of half wave width is very narrow, and the energy is very high.
What's the use of the KSF phosphor powder? Its role is to be able to greatly improve the coverage of color gamut of liquid crystal display (LCD).
Color gamut coverage is defined as the display device RGB trichromatic coordinates points formed by the area of a triangle as a percentage of total the whole CIE chromaticity space area. Color gamut coverage is to measure the main display device for real object color performance ability index, industry in general use NTSC (national television standards committee) standard. In general, the higher the NTSC color domain values, display device can display the color of the object is more bright-coloured, the closer to the color of real objects.
The current display technology generally divided into two LCD and OLED display, liquid crystal display (LCD) due to the use of phosphor technology can be divided into different period of several kinds of color gamut, and OLED and can be divided into white OLED display of liquid crystal filter and without liquid crystal filter RGB trichromatic OLED display. Various technologies of NTSC values are shown in table 1 below.
Because the KSF ultra narrow half wave wide spectrum characteristics of phosphors, make its spectrum after the LCD panel can also has a high color purity, thus greatly improve the color of the triangle area, greatly increase the value of NTSC. The KSF phosphor powder green phosphor collocation, can already be close to the belt filter the OLED panel color gamut coverage, and Switzerland abundant photoelectric can continue through the improvement plan, make the KSF scheme of color gamut coverage rate of nearly 100%.
At present, in the field of TV, because the RGB color OLED display panel to make larger yield is extremely low, basically by LG OLED panel with LCD TV monopoly filter white OLED panel. So in the field of television, color gamut of quantum dots to the OLED to KSF to ordinary yellow phosphor, but because of the high cost of quantum dots and OLED basically into very small fever and equipment; The KSF phosphors scheme of LCD TV is close to OLED display color gamut, and the low price than OLED and quantum dots, let consumers have a high color gamut television era.
And in the field of mobile phones, although color OLED phones occupy the high-end status, but because of the cost of the production capacity and, LCD screen mobile phone still occupies the absolute mainstream position, with the help of the KSF phosphor technology, LCD screen mobile phone is not too big gap in color gamut of the cases with cost advantage and OLED.
Patent insufficient reserves and the lack of core patent has been China's manufacturing enterprises. Although the Chinese market is a dare to try new technology market, however, because of China's manufacturing enterprises lack the support of the global patent and difficult to go abroad. Since the second half of 2014, China's LED back light manufacturing companies began to use the KSF phosphors to meet the demand of high color TV, but because the KSF phosphor material reliability problem and the limitation of the application patent KSF, back light LED manufacturing enterprises in China including ruifeng photovoltaic application has been carefully and accumulation with this technique, only to its use in the domestic market and more low-end third world market, don't need a patent license for high-end market of Europe and the United States, can only sigh at the.
Refond optoelectronics as mainland China the earliest and the most leading TV back light LED manufacturers, LED the KSF phosphors on the backlight application patent authorization, and solved the KSF of phosphor under high power reliability problems, so as to make the high quality color gamut of Switzerland abundant back light LED to developed markets. Switzerland abundant photoelectric will with perfect licensing reserves, in a professional focus attitude with phosphors KSF application technology give new color to liquid crystal display (LCD) power, make China's high color gamut back light LED to the world.
