Hey everyone,
Just wondering whether there is any breaking news on Quantum Dots, particularly in high-power LEDs. I noticed this morning that at least one manufacturer (Nexxus - http://www.nexxuslighting.com/ ) is selling household replacement globes featuring the technology.
I was wondering this morning, will quantum-dot-equipped LEDs change the way we design control circuitry? When there is no phosphor, the colour of the output will not change over varying light intensities. So we could go back to linear (variable voltage) drivers rather than the currently popular pulse-modulated variety.
I'm thinking this could have benefits in efficiency. Generally, LEDs are more energy efficient at lower forward voltages. So dimming LEDs using a lower Vf might be better. I do concede however that it might make circuit design more complicated / bulky / expensive.
I was thinking particularly in terms of household lighting. Powering from 240V could be achieved by a simple transformer, bridge rectifier, and capacitor power supply. Would this be dimmable using a normal household light dimmer?
Such a simple and low-tech design may be slightly more expensive to implement (transformer) but could be designed to be quite efficient using schottky diodes, etc. and it should last for yonks and be very reliable.
Just wondering whether there is any breaking news on Quantum Dots, particularly in high-power LEDs. I noticed this morning that at least one manufacturer (Nexxus - http://www.nexxuslighting.com/ ) is selling household replacement globes featuring the technology.
I was wondering this morning, will quantum-dot-equipped LEDs change the way we design control circuitry? When there is no phosphor, the colour of the output will not change over varying light intensities. So we could go back to linear (variable voltage) drivers rather than the currently popular pulse-modulated variety.
I'm thinking this could have benefits in efficiency. Generally, LEDs are more energy efficient at lower forward voltages. So dimming LEDs using a lower Vf might be better. I do concede however that it might make circuit design more complicated / bulky / expensive.
I was thinking particularly in terms of household lighting. Powering from 240V could be achieved by a simple transformer, bridge rectifier, and capacitor power supply. Would this be dimmable using a normal household light dimmer?
Such a simple and low-tech design may be slightly more expensive to implement (transformer) but could be designed to be quite efficient using schottky diodes, etc. and it should last for yonks and be very reliable.
