Скачать с ютуб 14" Inkjet Printing QD-EL by TCL CSOT, the future of Display Technology, Quantum Dot NanoLED в хорошем качестве

14" Inkjet Printing QD-EL by TCL CSOT, the future of Display Technology, Quantum Dot NanoLED

TCL CSOT shows their 14-inch inkjet printed Quantum Dot Electroluminescence (QD-EL) display at    • Display Week 2024   This technology represents a significant evolution in display technology, offering unique advantages over traditional OLED displays. The QD-EL display achieves a maximum brightness of 350 nits and utilizes a polarizer to enhance its brightness. Unlike OLEDs, which use organic materials, QD-EL displays employ inorganic quantum dot materials that emit light directly, eliminating the need for a backlight. ---- Thanks to Synaptics for being my Display Week 2024 video coverage sponsor! Watch all my Synaptics videos in this playlist:    • Synaptics Astra, AI-Native IoT Edge, ...   ---- The construction of the QD-EL display involves a sandwich structure similar to OLEDs, but instead of organic emissive layers, it uses quantum dots. This innovation allows for direct emission of light, enhancing efficiency and brightness. The manufacturing process does not require masks, which simplifies production. The substrate used in the display has numerous wells where the ink is deposited, creating the screen. These wells are designed with high precision to ensure proper alignment and function. In comparison to existing market technologies, QD-EL displays stand out due to their lack of need for a backlight. Current market options include QD-LCD, which relies on a backlight to excite the quantum dots, and QD-EL displays are poised to offer superior color performance and energy efficiency. This prototype, still in the research and development phase, is expected to enter mass production within two to three years. The color purity of the QD-EL display is exceptional, with a narrow wavelength peak, achieving over 85% of the BT 2020 color gamut. The conversation touches on the challenges and potential of inkjet printing technology. Inkjet printing allows for cost-effective and straightforward production, potentially reducing the overall cost of displays. The amount of quantum dot material needed for QD-EL displays is significantly less than that for QD-LCDs, which makes them more economical. However, the lifespan of these displays, particularly the blue quantum dots, remains a challenge. While red and green quantum dots have achieved lifespans comparable to OLEDs, blue quantum dots still degrade faster, an issue also seen in OLED technology. Despite the current limitations with blue quantum dots, the technology holds promise for future improvements. Strategies such as increasing the size of blue pixels or using multiple blue sub-pixels could mitigate the degradation issue. The maximum brightness of future QD-EL displays could exceed 400 nits, provided the blue quantum dot issue is resolved. The possibility of replacing screens as they degrade, if costs are kept low, could be a viable solution for maintaining display quality over time. Inkjet printing technology is well-suited for producing medium to large-sized displays, such as those used in notebooks and televisions, but it may not achieve the pixel density required for smaller devices like smartphones. The conversation suggests that QD-EL displays will likely first penetrate the TV market, with the capability to produce displays as large as 65 inches or more. The superior color performance and efficiency of quantum dots make them an attractive option for high-quality displays. Comparatively, inkjet printed QD-EL displays offer higher efficiency and color accuracy than inkjet printed OLEDs. The narrower wavelength peak of quantum dots results in better color gamut coverage. While inkjet printed OLEDs are already mature and commercially available, the QD-EL technology, despite being in the developmental stage, promises significant advancements in display quality and efficiency. The discussion underscores the long development cycle of display technologies, with OLEDs taking over 30 years to mature. Inkjet printing of OLEDs and QD-EL displays represents the culmination of years of research and development. The lifetime of red and green quantum dots in QD-EL displays matches that of OLEDs, but the blue quantum dot lifetime remains a hurdle. Current blue quantum dots achieve a T95 lifetime of around 100 hours at 1,000 nits, whereas OLEDs can reach 400-500 hours, indicating room for improvement. Efficiency measurements indicate that the QD-EL display performs well, particularly for red and green colors, with efficiencies of over 40 cd/A and 150 cd/A, respectively. Blue quantum dots lag behind with efficiencies around 10 cd/A, similar to current OLEDs. This efficiency, coupled with the potential for high color accuracy and brightness, makes QD-EL displays a promising future technology for high-quality displays across various applications.