The "2017 International Quantum Dot Display Industry Development Forum" hosted by the China Electronics Chamber of Commerce has a deeper understanding of the current high-quantity quantum dot display technology, especially for the concept of QLED. With the in-depth development of quantum dot TV, the frequency of QLED will become higher and higher in the future, but there are still common misunderstandings.

First, let's look at what is a quantum dot. A quantum dot is a semiconductor nanomaterial. It is composed of extremely tiny semiconductor nanocrystals that are invisible to the naked eye. Quantum dot materials can be used in the display field because they have a distinctive property that emits colored light when stimulated by light or electricity. The composition and size of the quantum dots determine the color of the light.

At present, mainstream LCD TVs use yellow LED light to excite yellow phosphors. Quantum dot TVs use blue LEDs to illuminate quantum dot materials to excite red and green light, while producing the white backlight required for liquid crystal displays. 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 finer, so that the color gamut coverage and color accuracy of the liquid crystal television are greatly improved.

This is just one kind of quantum dot display technology. In the end, it is only an improvement on the LCD TV backlight system. At present, the application is relatively mature, and another quantum dot display technology should start from the concept of QLED.

QLED is the abbreviation of Quantum Dot Light EmitTIng Diodes. It refers to quantum dot light-emitting diodes. It has the same self-luminous characteristics as OLEDs. It does not require an additional light source. The principle and structure of illumination are simpler. It is similar to the display mode of OLED. The principle.

Two different display structures for quantum dot television

It can be seen from the above text that the practical application of quantum dot display technology includes two stages: firstly, quantum dot backlight technology based on photoluminescence characteristics, which is essentially a liquid crystal television, so it is called QD-LCD, followed by The quantum dot light-emitting diode display technology based on electroluminescence characteristics, that is, QLED, is still in the laboratory development stage, and it is estimated that it will take at least 3-5 years for commercial use.

Therefore, if the quantum dot TV on the market is called QLED TV is not accurate, Baidu Encyclopedia's interpretation of quantum dot TV is not accurate enough, but it is also accurate. "Quantum dot TV is a TV with quantum dot technology backlight. It is a kind of LCD TV. It is different from traditional LCD TVs in that it uses different backlights, which brings many different performances. Compared with traditional LED backlights, traditional LCD TVs are more effective in picture quality, energy saving and environmental protection. Advantages have become the new development direction of LCD TVs in the industry."

Samsung’s flagship TV brand last year was named QLED, and its essence is still the quantum dot backlight LCD TV. Pay attention to the line below it, “Light Quality Sub-TV”, although it is called QLED, it is not electroluminescence technology. The quantum dot TVs launched by TCL, Hisense and other companies are also based on photo-induced quantum dot technology.

Finally, even though QLEDs are often mentioned in some publicity statements, we should keep a clear understanding of QLEDs. It should be impossible to see real QLED TVs in the short term. At present, the development trend of OLED TV is fierce, and the QLED TV with the same self-luminous characteristics has the strength to compete with it. At that time, the quantum dot technology will even realize the printed display and flexible display. It can manufacture the display like a newspaper, expecting it. Arrived early.

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