The “International Quantum Dot Display Industry Development Forum 2017†hosted by the China Electronic Chamber of Commerce has gained a better understanding of the quantum dot display technology with higher and higher sound volumes, especially for the concept of QLED. With the in-depth development of quantum dot TV, QLEDs will appear more and more frequently in the future, but there are generally misunderstandings.
First of all, let's take a look at what is a quantum dot. A quantum dot is a semiconducting nanomaterial. It consists of tiny semiconductor nanocrystals that are invisible to the naked eye. Quantum dot material can be used in the display because it has a unique characteristic. It emits colored light when stimulated by light or electricity. The composition and size of the quantum dot determine the color of the light.
Pure light can be obtained by changing the shape of the quantum dots
Currently, mainstream LCD TVs use blue LED light to excite yellow phosphors, while quantum dot TVs use blue LEDs to irradiate quantum dots to excite red and green light, and at the same time produce the white backlight required for LCD screens. Since the size and distribution of the quantum dot particles can be precisely controlled, the color and purity of the light emitted by the quantum dots are also more refined, so that the color gamut coverage and color accuracy of the liquid crystal television are greatly improved.
This is just a kind of quantum dot display technology. In the final analysis, it is only an improvement to the backlight system of LCD TVs. The current application has become more mature. Another kind of quantum dot display technology needs to start from the concept of QLED.
QLED is the abbreviation for Quantum Dot Light Emitting Diodes. It refers to the quantum dot light emitting diode. It has the same self-luminous characteristics as the OLED. It does not require an additional light source, and its light emitting principle and structure are simpler. Similar to the OLED in display mode. The principle.
Two Different Display Structures of Quantum Dot TV
As can be seen from the above text, the practical application of quantum dot display technology includes two stages: first, quantum dot backlight technology based on photoluminescence characteristics, and in essence, LCD TV, so called QD-LCD, followed by Quantum dot light-emitting diode display technology based on electroluminescence characteristics, that is, QLED, but this technology is still in the laboratory R & D stage, according to industry experts predict it will be at least 3-5 years of commercial use.
Therefore, if QD TVs on the market are called QLED TVs, it is inaccurate. Although Baidu Encyclopedia's interpretation of QD TVs is not deep enough, it is also more accurate. "QD TVs are TVs that use quantum dot technology as backlights. , is a kind of LCD TV, which differs from traditional LCD TVs in that it uses different backlight sources, resulting in a lot of differences in performance, which is more than traditional LCD backlighting traditional LCD TVs in terms of picture quality and energy saving and environmental protection. Advantages have become the new direction for the development of LCD TVs in the industry."
Samsung Releases QLED Light Quality Sub-point TV This Year
Samsung's new flagship TV this year is named QLED, and its essence is still the quantum dot backlight LCD TV, pay attention to the line below it, "light quality sub-point TV", although called QLED, but not electroluminescent technology Quantum-dot TVs launched by companies such as TCL and Hisense are also based on quantum dot technology.
Finally, even if QLEDs are often mentioned in some publicity statements, we should keep a clear understanding of QLEDs. It will be impossible to see real QLED TVs in the short term. When the development of OLED TVs is fierce, QLED TVs, which also have self-luminous characteristics, have the strength to compete with them. At that time, quantum dot technology will even realize printed displays and flexible displays. It can be used to make monitors like the Indian newspapers and look forward to it. Come early.
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