The principle of backlight has always been the bottleneck restricting the improvement of LCD TV quality. Since the LCD panel itself does not emit light, the display of the image needs to rely on the illumination of the light, which makes the LCD TV display, contrast, and contrast in the black field compared to the self-illuminating display device. The fluency and color of motion pictures have been difficult to improve. Although the technology for improving the quality of LCD TVs is endless, most of them are adjusted from the aspects of image calculation, color adjustment and other software. It can be said that it is not a cure for the symptoms, and it is difficult to break through the bottleneck of LCD TV itself.
However, in recent years, the technology to break through the barriers of LCD TVs has finally emerged. The ULED multi-zone dynamic backlight control technology achieves the contrast and picture fluency of the self-luminous technology through the flexible control of the backlight; the quantum dot technology replaces the traditional phosphor. The LED backlight source has greatly improved the purity and richness of color, breaking the limit of the color gamut coverage of LCD TVs.
Since 2013, the debate about OLED and liquid crystal technology has been fierce. Although the organic self-luminous OLED has certain advantages in the imaging principle, after several years of development, the problem of low OLED yield and short life has not been solved, and the investment cost is high, and OLED has not been promoted.
Compared to OLED TVs, ULCDs based on the liquid crystal principle provide a white field better than 4 times, 2 times contrast ratio, and provide twice the brightness visible range, and the picture detail level is higher. In the high color gamut index, ULED TV uses nano-scale quantum dot technology, which is 10% higher than OLED.
The core of ULED technology is multi-partition dynamic backlight control, which is obviously improved in terms of high peak brightness, black performance, contrast and layering. ULED TV divides the backlight into many independent controllable units. Through fine calculation and control, the backlight of each area is adjusted according to the brightness and level of the picture. The bright and transparent part enhances the brightness of the area, and the black The field and dark areas weaken or turn off the backlight of the section, allowing for high peak brightness, pure black performance, and higher contrast and layering.
As a relatively new topic in the TV industry this year, quantum dot technology has been used by many brands in its latest flagship product. The so-called quantum dot is actually a nano-scale particle that emits a single, pure light when illuminated by energy. While ordinary TVs rely on phosphors to illuminate, the spectrum of the backlights overlap and mix, the color performance is not pure enough, and the colors are difficult to control. Quantum dot TV relies on nano-scale particles to emit light, with higher color purity and wider color gamut, which can express more rich colors.
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