LED light bulbs can be brighter and more energy efficient than ever, thanks to a high performance LED driver newly developed by researchers from the Department of Electronic and Information Engineering.
The new driver powers LED light bulbs with an innovative approach called multi-level PWM (Pulse-Width Modulation), which delivers remarkable improvements in terms of light quality and energy efficiency, when compared to pulse width modulation and linear driver approaches currently used in LED products.
By traditional method of pulse width modulation, LEDs are fed pulsed current instead of steady DC. The drive current is turned ON and OFF at a rate faster than being perceptible by human eyes. Powering LEDs in pulses makes their light output easily controllable.
The research team, formed by Dr Lai Yuk Ming, Dr Loo Ka Hong and Prof. Michael Tse, gives the PWM method a new twist. The pulsed operation is redesigned in a way to maximize light output while minimizing wasted energy in the form of heat. The result is higher lumen per watt. Dr Loo Ka Hong said they achieved additional energy saving by up to 15%.
When used in a large scale application, it can save a lot of energy. The LED billboard on One Times Square in New York is a good example. The math goes like this: The giant display uses 12 million bulbs and 250 KW of power. If the billboard is on for 16 hours a day, the energy bill comes to US$18,000 a month. A 12% drop in energy consumption means US$2,160 in energy savings. That’s something to roll your eyes at.
Furthermore, it has lowered cooling requirements and needs smaller size heat sink compared to conventional methods. That means LED systems can be made smaller. With excellent dimming capability, the new MPWM driver allows manufacturers to create fully dimmable LEDs, which can be dimmed down to 0 watt of power. These superior qualities pave way for brighter, smarter and more versatile LED lighting solutions.
The world is switching to LEDs for huge environmental benefits. If all the traditional light bulbs in the world were replaced with energy-saving ones, lighting energy use could be cut by 40%, according to Worldwatch Institute . The Energy Saving Trust has similar projections , which said the resultant carbon saving would be the equivalent of taking 70,000 cars off the road.
As the greenest alternative to incandescent lamps, LEDs are a popular choice of lighting but they are not perfect. Consumers are looking for a brighter and more natural glow matching up to incandescent light bulbs. The demand for brightness is even more pronounced in high power applications such as automobile headlights and architectural lightings. LED research worldwide is looking to build a perfect substitute to incandescent. It is exciting to have advanced LED lighting with a simple solution such as MPWM that brings about significant energy saving.
Obviously, the novel technology allows a better product to be made. High illuminating performance combined with good thermal protection allowed manufacturers to create compact lighting solutions with a very high lumen output. And the additional cost is little because all of these qualities could be achieved with the use of low cost ICs. This could be music to the ear for LED manufacturers.
The Latest on: LED light bulbs
- India expected to procure 200 million LED light bulbs in 2018 on February 22, 2018 at 12:41 am
India's Ministry of Power is expected to procure 200 million LED light bulbs via open bids in 2018, with Philips Lighting and Ledvance expected to remain as the largest two competitors, according to industry sources. The ministry, in line with its Domestic ... […]
- Qook E14 3528 SMD 60-LED Home Spot Light, Cold White Spotlight Lamp Bulb on February 21, 2018 at 7:12 pm
All packages from DX.com are sent without DX logo or any information indicating DX.com. Due to package variations from suppliers, the product packaging customers receive may be different from the images displayed. […]
- La Crosse City Hall may get LED lights on February 20, 2018 at 12:39 pm
La Crosse City Hall could go even greener this spring after the Board of Public Works directed city staff Monday to work with e3 Lighting to upgrade the building to LED lighting. “Let’s get every bulb LED as much as we can. It saves money; it saves tax ... […]
- CNET's LED Buying Guide makes sense of the light bulb aisle on February 17, 2018 at 6:23 am
[MUSIC] So the thing about lightbulbs is that we use them more than just about anything in our homes. It's the first thing you do when you wake up is turn it on. And then you turn it off before you go to bed. But at the same time we don't think about them ... […]
- LED bulbs, Time to switch on new lights on February 17, 2018 at 2:00 am
The question: Since LED light bulbs cost more but use less energy, how soon would they pay for themselves? He was surprised to find that because of California's high energy prices, he could recoup his costs in less than two months. "When I figured out the ... […]
- The lighting is always flattering with these smart home light bulbs on February 15, 2018 at 2:32 pm
If you're not in the smart lights game for anything flashy and just want a standard-looking bulb, Cree Connected LED Bulbs have your name written all over them. According to reviews, customers love these Amazon's Choice bulbs because, well, they look like ... […]
- Green Deals: Philips 12-pack A19 LED Light Bulbs $22, more on February 14, 2018 at 2:35 pm
Philips LED light bulbs are designed with the customer in mind. We do this by combining our understanding of people with our expertise on technology and design – knowledge gathered over 120 years. We deliver what matters the most to you, based on ... […]
- Amazon has $9.99 LED light bulbs that can be controlled by Alexa and Google Assistant on February 13, 2018 at 7:43 am
If you’re not already invested in the Philips Hue ecosystem, we should warn you that Hue products are very expensive. Don’t get us wrong — they’re awesome, but expensive. Those of you looking for a simple smart lighting solution that can integrate ... […]
- $44 kit converts any car to LED headlights on February 13, 2018 at 12:00 am
For just $44, you can ditch the crummy halogen headlamps in your car and convert your headlights to bright, beautiful LED bulbs like the ones in luxury cars. CougarMotor offers kits that work with any bulb size out there, so any car can be converted. […]
- Soraa’s Healthy & Radiant Light Bulbs: “Soraa Healthy Is The Only Zero Blue LED Light Currently Available” on February 12, 2018 at 7:15 am
The first reason you should get your hands on and completely switch out your home’s lights with Soraa lighting is because this is essentially the organic version of lights in 2018. The company has been around for years but is finally taking the huge ... […]
via Google News and Bing News