SETI and Seoul Viosys Violeds Modules Proven to Disinfect 99% of Airborne Viruses in Recent Test Results

Dec. 21, 2020
Seoul Viosys and SETi UV LEDs sterilization performance verified by Korea Testing Laboratory.

SETi currently has two sample sanitation products demonstrating UV-C LED technology available for purchase at

ANSAN, South Korea (December 2020) – Sensor Electronic Technology, Inc. (SETi) and Seoul Viosys (KOSDAQ: 092190) the leading global providers of UV LED technology and subsidiaries of Seoul Semiconductor, have demonstrated that an air conditioning and heating system with its ultraviolet LED Violeds modules has the performance to disinfect 99% of airborne viruses, verified through the results of testing by Korea Testing Laboratory (KTL). The testing demonstrated that Violeds is a breakthrough UV LED technology that helps prevent the spread of COVID-19 and other aerosolized viruses.

The air conditioning and heating system tested with the Violeds UV-C LED module installed resulted in 99% disinfection of the airborne viruses in a 650 cubic-foot (60m3) room within 30 minutes. The virus used in testing is bacteriophage (Phi X 174), which has a similar response to UV-C dosage as SARS-CoV-2 (Coronavirus 2).

The Violeds module is an optimized UV-C LED solution capable of simultaneously disinfecting various airborne viruses and bacteria, as well as air purification by disinfecting the air drawn into the air conditioner or heating ducts and eliminating viruses in the air. The module can be easily installed in air conditioning and heating systems while in use.

Together with SETi, Seoul Viosys has been promoting a campaign to install Violeds modules in the air conditioners and heaters of applicants since August, 2020 targeting public and multi-purpose facilities to help reduce both air and surface pathogens in indoor spaces.

“With the impact of the COVID-19 pandemic, the global market for UV LEDs is expected to grow into $2,786 million in 2025, according to Yole Développement, a leading market compound semiconductor research company. SETi and Seoul Viosys will continue to provide our patented UV LED technology for these applications as a proven and safe alternative for air purification and disinfection, without the use of hazardous materials that are found in mercury UV lamps,” said an official at SETi.

SETi currently has two sample sanitation products demonstrating UV-C LED technology available for purchase at

About SETi

Sensor Electronic Technology, inc. (SETi), a division of Seoul Semiconductor and Seoul Viosys, is a company based in Columbia, South Carolina, founded in 1999 by four Ph.D.s, for research and development of compound semiconductors in the United States. In 2005, SETi received the investment and R&D funding from Seoul Semiconductor and Seoul Viosys. For the development project, SETi is also working with the University of South Carolina and the University of California at Santa Barbara, adding depth to its research and development. Currently, SETi is the only company in the world that can produce UV LEDs from 200nm to 430nm. To learn more, visit

About Seoul Viosys

Seoul Viosys is a full-line solution provider for UV LED, VCSEL (Vertical Cavity Surface Emitting Laser), the next-generation light source for 3D sensor and laser, and a single-pixel RGB “Micro Clean Pixel” for displays. Established in 2002 as a subsidiary of Seoul Semiconductor, it captured No. 1 market share in the UV LED industry (LEDinside, 2018). Seoul Viosys has an extensive UV LED portfolio with all wavelengths range (200nm to 1600nm) including ultraviolet rays (UV), visible rays and infrared rays. It holds more than 4,000 patents related to UV LED technology. Violeds, its flagship UV LED technology, provides a wide range of industries with optimal solutions for strong sterilization and disinfection (UVC), skin regeneration (UVB), water/air purification and effective cultivation for horticulture. In 2018, Seoul Viosys acquired RayCan, a leading optoelectronic specialist, to add the advanced VCSEL technology which supports smartphone facial recognition and autonomous driving, and has started its mass production. In January 2020, it introduced a disruptive “Micro Clean Pixel” that has the potential to be a game-changer in the display market. To learn more, visit

About Seoul Semiconductor

Seoul Semiconductor is the world's second-largest global LED manufacturer, a ranking excluding the captive market, and has more than 10,000 patents. Based on a differentiated product portfolio, Seoul Semiconductor offers a wide range of technologies, and mass produces innovative LED products for indoor and outdoor lighting, automotive, IT products, such as mobile phone, computer displays, and other applications, as well as the UV area. The company’s world’s first development and mass production products are becoming the LED industry standard and leading the global market with a package-free LED, Wicop; a high-voltage AC-driven LED, Acrich; an LED with 10X the output of a conventional LED, nPola; a cutting edge ultraviolet clean technology LED, Violeds; an all direction light emitting technology, filament LED; a natural spectrum LED, SunLike; and more. For more information, please visit

Seoul Semiconductor Inc.

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Andrew Smith

Tel: (901) 831-6614

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Seoul Semiconductor Inc.

Asia - Jeonghee Kim

Tel: +82-70-4391-8311


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