New Low-heat, High-efficiency White Lighting
As a modern culture, we crave artificial white lights — the brighter the better, and ideally using less energy than ever before. To meet the ever-escalating demand for more lighting in more places and to improve the bulbs used in sports stadiums, car headlights and street lamps, scientists are scrambling to create better light-emitting diodes (LEDs) — solid state lighting devices that are more energy efficient than conventional incandescent or fluorescent light sources.
Just one thing stands in the way: “droop,” the term for a scientific problem related to LEDs currently in use. Droop refers to the fact that LED efficiency falls as operating currents rise, making the lights too hot to power in large-scale applications. Many scientists are working on new methods for modifying LEDs and making progress toward cooler, bigger and brighter bulbs.
Now investigators at University of California, Santa Barbara, led by material scientists Kristin A. Denault and Michael Cantore, have devised an alternative means of creating high-power white light by using a different excitation source — a laser diode in combination with inorganic phosphors, instead of the traditional LEDs.
Their laser-based lighting options are high in efficiency and high in performance metrics, according to their study, which is described in the journal AIP Advances, which is produced by AIP Publishing.
“We found two ways to create high-intensity ‘cool’ white light, explained Denault. “In one we used a blue laser diode and yellow-emitting phosphor powder with a luminous flux of 252 lumens, which is comparable to current high-brightness white LEDs. For our second method, we used a near-ultra-violet laser diode and a combination of red-, green-, and blue-emitting phosphors.”
They also achieved a variety of other color temperatures with high color rendition, broadening the range of applications for these new lights, she said.
The Latest Bing News on:
Laser-Based Lighting
- Laser light makes a material magneticon April 26, 2024 at 6:59 am
By applying laser light that is both circularly polarized – that is, its polarization traces out a corkscrew-like shape as it propagates – and resonant with the frequency of atomic oscillations within ...
- New laser tech using Raman spectroscopy detects illegal elephant ivoryon April 25, 2024 at 11:23 am
Now, scientists have devised a way to detect a distinction between illegal elephant ivory and legal mammoth tusk ivory. They developed a laser-based approach employing Raman spectroscopy to ...
- A laser-based air quality monitor on every lamp post?on April 25, 2024 at 2:41 am
An EU-funded project called PASSEPARTOUT is developing a new gas-sensing network that can analyse multiple gasses in real-time. The system is sufficiently compact (‘hand sized’) and affordable (sub ...
- Hisense’s PX3-Pro Laser Cinema gets AI, a bigger picture, and better soundon April 24, 2024 at 6:00 am
Hisense today unveiled its latest ultra short throw projector, the PX3-Pro Laser Cinema. It boast a brighter and bigger image, plus 50 watts of built-in sound.
- Science shocker: Light can vaporize water without heat, says MIT studyon April 24, 2024 at 1:56 am
The photomolecular effect could explain a long-standing discrepancy in climate science – the observed higher absorption of sunlight by clouds than conventional models predict.
- Confluence Networks, Laser Light Ink $20M Deal for Undersea Fiber Opticson April 23, 2024 at 11:06 pm
Confluence Networks, a developer and provider of subsea fiber-optic network connectivity, and Laser Light Communications, a developer and provider of software-controlled optical network services, ...
- At-Home Laser Hair Removal Gets You Silky-Smooth Skin for Hundreds Less Than In-Salon Treatmentson April 23, 2024 at 5:03 am
At-home lasers are mostly light-based devices that use low levels of energy to reduce hair on various parts of the body, says Christian Karavolas, laser hair removal expert and founder of Romeo & ...
- Non-invasive light-based techniques may improve detection of skin cancer, reveals studyon April 19, 2024 at 9:30 am
A study conducted by Aston University researchers has demonstrated that the appearance of ageing skin looks noticeably different compared to younger skin, when examined under polarised laser ...
- Review Highlights Benefits of Laser, Light Therapy for PCOS-Related Hirsutismon April 18, 2024 at 3:55 am
Laser and light hair treatments, with and without other treatments, improve hirsutism and related psychological measures in women with PCOS.
- Attosecond imaging made possible by short and powerful laser pulseson April 16, 2024 at 5:24 am
Extremely short pulses of laser light with a peak power of 6 terawatts (6 trillion watts)—roughly equivalent to the power produced by 6,000 nuclear power plants—have been realized by two RIKEN ...
The Latest Google Headlines on:
Laser-Based Lighting
[google_news title=”” keyword=”Laser-Based Lighting” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
The Latest Bing News on:
Laser-based lighting options
- Florida man arrested for allegedly pointing lasers at passenger aircraft at international airport: policeon April 25, 2024 at 8:55 pm
A Florida man was arrested after he allegedly pointed a laser at a Jet Blue plane that was landing at Tampa International Airport, according to police.
- The 5 best outdoor projectors of 2024 are ready for your summer movie nightson April 25, 2024 at 2:09 pm
A fun way to get the most out of your backyard is to set up an outdoor projector and host a movie night. An outdoor projector, combined with wireless speakers, a popcorn machine and a few comfy lounge ...
- Laser technology could help curb the illegal trade in ivoryon April 24, 2024 at 3:09 pm
A new study has found that a laser technology can quickly and accurately tell the difference between ivory that came from living elephants and ivory that came from their extinct relatives, mammoths.
- 8 Best IPL Hair Removal Devices for Long-Lasting Resultson April 19, 2024 at 1:59 pm
Two board-certified dermatologists break down everything you need to know IPL hair removal devices and share their recommendations.
- Non-invasive light-based techniques may improve detection of skin cancer, reveals studyon April 19, 2024 at 9:30 am
A study conducted by Aston University researchers has demonstrated that the appearance of ageing skin looks noticeably different compared to younger skin, when examined under polarised laser ...
- Best color laser printers for 2024: tested and reviewedon April 11, 2024 at 5:00 pm
With the Brother HL-L3280CDW you can expect print speeds of up to 27 ppm for both black and color pages, a wide variety of connectivity options ... cartridge-based inkjets. However, laser printers ...
- We Tested the Best Laser Measures for DIYers and Proson April 11, 2024 at 1:53 am
Laser distance measures use a laser ... makes it easier to read the measurement results in bright light. It has several measurement options as well as built-in data storage capable of keeping ...
- Barco’s Laser Focus on HDR Could Brighten Digital Cinema Marketon April 10, 2024 at 7:00 am
Roughly 50,000 (more than 30,000 of which are Barco systems, according to the company) offer newer standard dynamic range laser light-based projectors ... pricing for LED options could start ...
- Considering Skin Laser Treatments? Derms Share Everything You Need to Knowon April 1, 2024 at 12:15 pm
However, with so many different types and options available ... spectrum of energy treatment modalities that are not laser light based that are also effective in rejuvenating skin, including ...
- How do lasers work?on March 28, 2024 at 5:00 pm
This light-based technology has helped build the modern, deeply interconnected world we live in. But what, exactly, are lasers, and how do they work? The word "laser" is actually an acronym ...
The Latest Google Headlines on:
Laser-based lighting options
[google_news title=”” keyword=”laser-based lighting options” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]