This is another major progress made by BOE in the field of electroluminescent quantum dots after the release of high-resolution qled technology at the beginning of this year. It is understood that quantum dot light-emitting diode (qled) is generally regarded as the next generation display technology after active matrix organic light-emitting diode (AMOLED). At present, the application of quantum dot technology in display products mainly includes photoluminescence quantum dot backlight technology and active electroluminescent quantum dot diode technology (amqled). < p > < p > different from the backlighting technology of photoluminescence quantum dots, amqled display does not need a back light source, and can make quantum dots emit light by injecting current. It has the advantages of self luminescence, wide color gamut and long life, which has become the development direction of quantum dot display. < p > < p > the 55 inch 4kamqled display product launched by BOE this time adopts electroluminescent quantum dot technology, the resolution is 3840 × 2160, the color gamut is as high as 119% NTSC, and the contrast can reach 1000000:1, which has broad market space and application prospect in the field of large-scale display. < p > < p > in the field of amqled, BOE electroluminescent quantum dot technology is at the international leading level. As early as 2017, BOE launched 5-inch and 14 inch amqled product prototypes with full ink-jet printing technology, and won the SID best in show award. Global Tech