Views: 0 Author: Site Editor Publish Time: 2022-09-21 Origin: Site
Researchers at the University of Cambridge in the United Kingdom have combined printing nanotechnology, color science and advanced computing methods to successfully develop an LED smart lighting system that uses multiple colors to more accurately simulate white light.
It is reported that using quantum dot technology, the research team found that using more colors than the three primary light colors used in typical LEDs can more accurately reproduce sunlight through wide color controllability and high color rendering performance.
During the research, the researchers developed a quantum dot LED architecture that combines system-level color optimization, device-level optoelectronic simulation, and material-level parameter extraction. At the same time, a computational design framework is fabricated based on color optimization algorithms for neural networks in machine learning, as well as new methods for charge transport and light emission modeling.
Notably, the researchers selected quantum dots of a specific size (3-30 nm in diameter), overcoming some practical limitations of LEDs, to obtain the emission wavelengths needed to validate the team's predictions.
The quantum dot LED white lighting structure developed this time can be extended to large-area lighting surfaces because the structure is fabricated by a transfer printing process using cadmium selenide (CdSe) quantum dots (for red, green, cyan, and blue light) made, and these are driven by a single common control voltage to achieve a full color temperature range.
On this basis, the research team verified the feasibility of the design by creating a new structure of white light-based quantum dot LED devices, and the test results demonstrated excellent color rendering, wider operating range than existing technologies, and wider white light Lampshade custom spectrum.
According to reports, the color temperature of existing LED smart lamps is about 2200K-6500K. In contrast, this LED smart lighting system shows a correlated color temperature range of 2243K (reddish) to 9207K (noon sunlight). In addition, the color rendering index of this quantum dot LED system is 97, while the color rendering index range of existing smart bulbs is 80-91, and the parameters are significantly higher.
The co-leader of the study, Professor Jong Min Kim from the School of Engineering, University of Cambridge, said that this is the first time in the world that a fully optimized, high-performance quantum dot intelligent white light lighting system has been developed. a milestone.
Another co-leader of the research team, Professor Gehan Amaratunga, said the team's goal was to be able to better reproduce sunlight through the dynamically changing color spectrum in a single light, and they managed to do so with a new method based on quantum dot technology. He believes that this research opens the way for the creation of various new humane lighting environments.
Intelligence, personalization, and sceneization have gradually become the labels of smart lighting products, and they are also the main directions for the development of products by smart lighting-related manufacturers. Although the current smart lighting technology is not yet fully mature, and the market promotion effect is not up to expectations, but with the continuous breakthroughs in technical research, the gradual establishment of market standards and the vigorous promotion of manufacturers, smart lighting can still be expected.
