The researchers at the University of Cambridge have designed the next-generation smart lighting system using a combination of nanotechnology, color science, advanced computational methods, electronics and a unique fabrication process. They were able to reproduce daylight conditions using more than three primary colors used in typical LEDs.

Figure 1: The next generation lightening system using quantum dots.

Figure 1 shows thatPeople prefer visual comfort, whether it be a design of a product or a workspace. Visual comfort is achieved when the vicinity has a good natural or artificial light source and some good glare control. An object’s color is determined by illumination and that is what we require. [1]

The Cambridge researchers developed an architecture for quantum-dot light-emitting diodes (QD-LED) based next-generation smart white lighting. They combined system-level color optimization, device-level optoelectronic simulation, and material-level parameter extraction.

The researchers produced a computational design framework from a color optimization algorithm used for neural networks in machine learning, together with a new method for charge transport and light emission modeling.

The QD-LED system uses multiple primary colors – beyond the commonly used red, green, and blue – to more accurately mimic white light. By choosing quantum dots of a specific size – between three and 30 nanometers in diameter – the researchers were able to overcome some of the practical limitations of LEDs and achieve the emission wavelengths they needed to test their predictions. [2]

The QD-LED system was able to output a much broader color temperature (CCT) range than current LED-based smart lights.The design could pave the way to more efficient, more accurate smart lighting.

In an LED smart bulb, the three LEDs must be controlled individually to achieve a given color. In the QD-LED system, all the quantum dots are driven by a single common control voltage to achieve the full color temperature range.

Professor Jong Min Kim, who co-led the research, said: “This is the first milestone toward the full exploitation of quantum-dot-based smart white lighting for daily applications.” [3]

References:

1. https://www.electronicsforu.com/news/whats-new/quantum-dots-can-be-an-efficient-alternative-to-leds
2. https://scitechdaily.com/led-smart-lighting-system-based-on-quantum-dots-more-accurately-reproduces-daylight/
3. https://eandt.theiet.org/content/articles/2022/08/quantum-dots-offer-efficient-colour-accurate-alternative-to-leds/

Cite this article:

Sri Vasagi K (2022), Quantum Dots can be the Next Generation Lightening System, Anatechmaz, pp.66