Scientific research demonstrates the positive impact of daylight LED on visual comfort, melatonin, mood, wakefulness and sleep

- Sep 25, 2019-

t is well known that light is one of the strongest control factors of human circadian rhythms, such as the secretion of sleep-promoting hormone melatonin. Therefore, optimal lighting conditions during the day are critical to prevent circadian rhythm disorders that can lead to sleep disorders and other lifestyle-related diseases. In the past decade, relevant scientific research has been conducted on the effects of sleep, time biology, physiology, and light quality on the care of older people.

According to Professor Cajochen's research, LED light sources with the same measured correlated color temperature (CCT) and intensity but different spectral outputs can have different effects on human behavior and physiology. Compared to those exposed to conventional spectral LEDs, LED light sources with a spectrum close to natural sunlight produce better visual comfort, higher alertness and happier mood in the morning and evening of the test participants. The study tested visual comfort, day and night physiology, daytime alertness, mood, cognitive performance, and sleep after exposure to traditional LED lights and natural-spectrum LED lights for 49 hours in a laboratory setting.

Quoted from the paper: "We have evidence that the daylight [natural spectrum] LED solution is beneficial for healthy volunteers' visual comfort, daytime alertness, mood and sleep intensity. Delta EEG activity (0.75-4.5Hz) is significantly higher than Daylight-LEDs are exposed to traditional LED exposures at night after exposure." [Note: Delta EEG (electroencephalogram) measurements record delta waves, associated with Stage 3 non-rapid eye movement (NREM) sleep or "slow wave sleep" (SWS) Brain waves and help to characterize the depth of sleep. ]

By providing the same spectrum as the range of sunlight and visible light, the SunLike series of natural spectral LEDs can benefit human well-being, consistent with visual mechanisms that affect eye image formation and non-image formation. As the control of the circadian rhythm. Although the quality of artificial light has so far been primarily described in terms of color and intensity, the SunLike series of natural spectrum LEDs have taken the spectrum as another important factor in determining overall light quality.

“This research by the University of Basel shows another important aspect of the development of artificial light over the past 80 years. In addition to the characteristics of energy efficiency and long life, we have also added the factor of 'human well-being'. For modern LED light sources "Nam Ki-bum, executive vice president of semiconductor sales in Seoul, said. “As the world's first product to mass produce LED devices for natural sunlight quality, SunLike series LEDs are driving lighting technology in this important area as we continue to respond to the market demand for customer lighting applications.”

According to a recent comprehensive sleep study conducted by scientists at the University of Basel, according to Seoul Semiconductor, its SunLike series of natural spectrum LEDs has been identified as a key source of light for human well-being.

In 2017, Seoul Semiconductor cooperated with Toshiba Materials' TRI-R spectroscopy technology to develop the SunLike series of natural spectrum LEDs as the first LED light source to closely match the natural light spectrum. Through their beneficial effects on human well-being and sleep, the two companies have promoted this natural sunlight spectroscopy technology and become a key value in the development of lighting.

About Seoul Semiconductor:

Seoul Semiconductor develops and commercializes LEDs for the automotive, general lighting, specialty lighting and backlight markets. As the world's second-largest LED manufacturer, excluding the exclusive market, Seoul Semiconductor has more than 14,000 patents, offering a wide range of technologies and mass production of innovative LED products such as SunLike - providing the world's best in next-generation LEDs. Light quality for human-centric lighting, optimized for day and night rhythms; WICOP - a simple, unpackaged LED that delivers market-leading color uniformity and cost savings at the fixture level, providing high lumen density and design flexibility; NanoDriver Series - The world's smallest 24W DC LED driver; Acrich is the world's first high-voltage AC-driven LED technology developed in 2005, including all AC LED related technologies from chip to module and circuit manufacturing, and new LED products based on GaN substrate technology nPola Its output is more than ten times that of traditional LED production. UCDs form a high color gamut display that provides over 90% NTSC.

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