Scientists Have Developed Zero Blue LED Lights左蓉-宣盟-7组

Scientists have developed zero blue LED lights

As a kind of colored light, blue light is ubiquitous in various lamps. However, most of the LED lights currently on the market emit blue light through the chip to excite the yellow phosphor to reconcile the white light. Therefore, the blue light problem of LED light sources between 400nm and 500nm is particularly prominent.

Previous studies have confirmed that blue light with a wavelength of 450 to 500 nm can inhibit the production of melatonin, thereby affecting the quality of our night sleep. Now, researchers have developed an LED prototype. The LED reduces the blue component (instead of the mask), reduces the blue component, and at the same time makes the color look like it is in natural sunlight. The research was published in the journal ACS Applied Materials & Interfaces.

The prototype device can emit warm white light without the blue hue that can cause health problems

As a proof of concept, the researchers identified and synthesized a new type of fluorescent crystal containing containing ((Na1.92Eu0.04)MgPO4F). In the thermal stability test, the emission color of the phosphor remains consistent between room temperature and the higher operating temperature (149.4°C) of commercial LED lighting. In the long-term humidity test, the color of the compound or the intensity of the light produced did not change.

In order to understand how this material works in a bulb, the researchers created a prototype device: a purple LED bulb covered with a silicone cap, which contains a mixture of blue compounds, red phosphors and green phosphors. It produces the required bright warm white light while minimizing the intensity of blue wavelengths, which is different from commercial LED bulbs. 8- 

 The researchers say that the optical properties of the prototype can almost show the color of the object, such as natural sunlight, which can meet the needs of indoor lighting, although they added that more work needs to be done before preparing for daily use.

Scientists Have Developed Zero Blue LED Lights

A team of researchers from the National University of Singapore has developed a new type of LED light that is completely blue-free. These so-called "zero-blue" lights emit a warm white color that is similar to traditional incandescent bulbs, but without the harmful effects of blue light on human eyes and sleep patterns.

Blue light has been linked to a range of health problems, including disrupted circadian rhythms, reduced melatonin production, and increased risk of macular degeneration. Many people today spend hours each day staring at smartphones, tablets, and computer screens that emit large amounts of blue light, and this exposure has been linked to a growing number of health concerns.

To address this problem, the NUS team set out to create an LED light that would be free of blue light. The researchers used a combination of phosphors that emitted warm white light when excited by a blue LED. By carefully selecting the composition and structure of these phosphors, the team was able to eliminate all blue light emissions, while still producing a high-quality, warm white light.

According to the team, these zero-blue LED lights offer a range of benefits over traditional LED lights. In addition to being healthier for human eyes and sleep patterns, they also have a greater color rendering index (CRI). This means that they can more accurately reproduce colors as they would appear under natural light, making them ideal for applications such as home lighting and art display.

The new lights also have lower energy consumption than traditional LED lights, making them more environmentally friendly. They emit less heat than incandescent bulbs, reducing the need for air conditioning. And because they do not emit any blue light, they can be used without concern in sensitive environments such as museums, art galleries, and hospitals.

The NUS team is now working to further refine their zero-blue LED technology, with the goal of making it more widely available in the coming years. They hope that the new lights will be embraced by consumers and businesses alike, offering a healthier, more sustainable lighting option for everyone.

In a world where blue light exposure is increasingly prevalent, the development of zero-blue LED lights marks a major breakthrough. By reducing the harmful effects of blue light on human health, these new lights offer a safer, more sustainable alternative that can benefit us all.