Quantum point LCD TV relative to the ordinary LCD TV from the brightness and excitement purity is not an advantage

    Tsinghua's researchers measured the spectral reflectance curve (SPD) and brightness Y of the R / G / B tricolor patches displayed on the two screens using the THOUSLITE FS Spectral Illuminance Meter and the MeasureTool V1.0 measurement software. The spectral reflectance curve The narrower the bandwidth, the more pure the color. From the experimental report, for the R / G color block, ordinary LED LCD TV brightness value is greater than the quantum dot LCD TV, and for the B color block, the two brightness values ??are equal. On the whole, ordinary LED LCD TV brightness is better than quantum dot LCD TV. From the experimental conclusion, the quantum dot LCD TV relative to the ordinary LCD TV no obvious advantages.

 

    In this regard, Tsinghua University researcher said that ordinary LED LCD TV and quantum dot LCD TV are passive light, all belong to the LCD TV category. And the rigorous sense of the quantum point of the TV should be self-luminous, and now the use of LCD backlight products is just called "quantum dot" LCD TV, according to Zhejiang University Professor Peng Xiaogang, quantum dot technology if you want to develop to Ideal state, at least three to five years time.

 

    Look at the future from experiment

 

    In the history of LCD TV picture quality improvement struggle, researchers pay a lot of effort. To enhance the performance of LCD TV, R & D personnel based on the nature of LCD TV passive light, starting from the backlight, have launched a wide color gamut backlight and quantum dot backlight, they were the use of red and green fluorescent materials and red and green quantum dots to LCD module provides a wider range of backlight backlight, LCD TV significantly enhance the color gamut capabilities, but these two technologies have failed to improve the consistency of the original color shade, which is not the red, green and blue primary colors of the wavelength value of 700nm , 546.1nm, 435.8nm or to this concentration, so no matter how high the color gamut, TV screen performance is still not up to standard.

 

    According to home appliances experts Liu Buchen's argument, the current market in the sale of the so-called "quantum point TV", accurately should be called "quantum dot backlight LCD TV." The main principle of quantum dot application in display technology is to excite the quantum dot crystals of different sizes in the quantum dot tube through the pure blue LED light source to release pure red photons and pure green photons and project with the remaining pure blue light to the imaging system And imaging.

 

    The problem is that different manufacturers of quantum dot recipe are not the same, so the final show the color effect is also very different. For the industry, the color accuracy of quantum dots has always been a difficult problem, often red is very prominent, blue and green but very general. The Tsinghua University Institute of color of the authority of the experiment once again shows that the quantum dot LCD TV in the color performance is not as good as publicity, compared to the traditional LCD TV advantage is not obvious enough.

 

    However, the quantum dot television studied in the field of optoelectronics research is an "active light" technique that emits light by means of a current-excited quantum dot screen material, rather than the current demand for "backlit" quantum dot LCD televisions. At present active active quantum dot screen technology is still in the development stage.

 

    Technological innovation is the source of vitality of the industry, but also the inevitable requirement of consumer upgrades. In the LCD technology is difficult to achieve more quality picture of the case, the television industry needs a real leadership and groundbreaking business and technology to lead the development of the industry. With the academic research results are more widely recognized, a new round of display of technological trends will come.