What is a quantum dot TV?
Jan 10, 2022
From the material point of view, quantum dots are semiconductor nanocrystals. Usually composed of zinc, cadmium, selenium and sulfur atoms. Quantum dots have very unique optical and electrical properties. Especially when it is stimulated by light or electricity, quantum dots will emit colored light. In fact, physicists have been paying attention to and studying quantum dots since the 1970s, but due to the reasons of the preparation technology at that time, the quantum dots The mass production rate is extremely low, so only basic research can be done. Until the end of the 1990s, with the improvement of preparation technology, quantum dots showed amazing application prospects at once. Currently, quantum dots are mostly used in the fields of biomedicine, solar cells, and display technology. The application of quantum dots in TVs is mainly as a backlight enhancement technology. Through the use of quantum dot materials, the color gamut coverage of the display screen is greatly improved, and the displayed pictures are more vivid and realistic.
There are currently two solutions for quantum dot TVs, one is to use quantum tubes, and the other is to use quantum films. The first-generation technical solution of quantum dots, that is, quantum tubes.
The second generation is a quantum film. Compared with the first generation of quantum tubes, although quantum films are much higher in cost, they are better than quantum tubes in terms of stability, service life and color performance.
The second-generation quantum film technology uses a quantum dot film material coated with red and green light in the backlight, which is excited by a blue LED lamp to produce purer red and green light, which is mixed with the blue light emitted by the original LED Together, constitute the required white backlight. Finally, through the filtering of the color filter of the display panel, a wider color gamut coverage is achieved.
