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How BenQ interactive displays minimize the spread of pathogens in an interactive classroom environment

New interactive learning techniques are rapidly becoming the norm in the effort to boost student performance. But many of the behaviors that are required for group interactive learning can unknowingly spread dangerous pathogens to students, faculty, and their families. This is a relatively new issue in education since the traditional model of using a projector as the primary display limited the physical touching of common objects in the classroom.

In interactive learning environments, students write on interactive boards with their fingers, do group activities together, and maybe solve the same problem side by side on the same display. While these activities help students learn, they can also be a source of spreading pathogens.

Use of Anti-microbial coatings to control pathogens

Classrooms are only one environment where common items are shared among multiple people. Hospitals are faced with the challenge of delivering quality care using the latest equipment while minimizing the risk of infecting patients. This has led to the development of medical-grade anti-microbial materials. For example, portable medical isolation care stations are coated with anti-microbial paint to reduce risk to nurses and patients from infection.


Many items found in operating rooms also have integrated anti-microbial protection such as surgical lighting, touch panels, and other devices that are handled frequently to avoid cross-contamination. In 2018, BenQ was the first company to recognize the opportunity to protect students with the same types of protective coatings that are now common in hospitals.

Does silver ion nanotechnology work against bacteria and viruses?



In the days before milk could be pasteurized or refrigerated, people would drop a silver coin into a bottle to preserve it.  The development of nanotechnology using silver ion particles was undertaken based on early research from the University of Texas on the effectiveness of reducing bacteria on various surfaces using these different types of metal as active agents, including gold and silver.



In 2011, researchers from the University of Naples published a paper that detailed how silver ion nanotechnology was shown to have positive results in controlling different virus types.  This has prompted ongoing research into this technology to improve the efficacy of the technology and broaden the number and types of viruses that can be controlled.  Today there are dozens of scholarly papers from around the world that detail findings on how this technology is used against various types of pathogens.

 

Silver ion nanotechnology works because its properties enable it to disrupt the cell walls of bacteria, compromising microbe cellular integrity.
BenQ application of silver ion coating on interactive displays

The glass used for interactive displays is quite complex, and coating it with silver ion nanotechnology is a significant engineering challenge, especially given the large size of modern displays and the need for other elements such as anti-glare coatings and hardness requirements to keep students from easily breaking the glass

While the vast majority of interactive displays sold in the US today use standard off-the-shelf glass, the glass used in BenQ products is different. To make the silver-ion coating effective, the glass needs to be coated with nanoparticles at a special factory, where it is either sandwiched with other coatings (such as anti-glare compounds) or precisely mixed into a proprietary recipe that enables the display to be cured. These coatings can be applied to displays as large as 86 inches, but require expensive equipment and special handling to ensure these large pieces of glass do not crack or break during the process. After the displays are cured, they are sent over to be integrated into the interactive display frame.

TUV certification testing for effectiveness

The last part of the process of applying silver ion nanotechnology coating onto interactive displays for schools and companies is to validate that it works. History is littered with products that offered health benefits – only to fail when tested by a legitimate third party. To ensure the effectiveness of silver ion coating, each BenQ model is tested by TUV.

Headquartered in Munich, TUV is one of the largest testing and certification labs in the world, with nearly 600,000 issued certificates. For anti-microbial testing, the company has advanced microbiological testing laboratories that validate whether a product provides an effective solution, and certifies it for various types of pathogens.

BenQ certifications and cleaning instructions

Each BenQ interactive display is certified against two major types of microbes. While the technology may be effective on other types of pathogens, we are the first interactive display with certified results in the elimination of two major types of bacteria that represent a significant threat to public health.

E-coli (Escherichia coli)


E-coli is a well-known pathogen and has an exceptionally long lifespan on surfaces.  One study indicates that the bacteria can live 90 days either in the soil or on different types of surfaces. BenQ interactive displays with silver ion nanotechnology were proven effective at reducing E-coli accumulation on shared, interactive screens.

Staphylococcus

This dangerous bacteria can spread from person to person by direct contact or through contaminated objects, or less often by inhalation of infected droplets dispersed by sneezing or coughing. The BenQ coating on displays was also tested by TUV and certified to reduce the pathogen on display surfaces.

Using and maintaining BenQ interactive displays

BenQ display silver ionic coating is fused to the glass, similar to other coatings such as the one used for anti-glare. In order to ensure the integrity of both the anti-glare and the anti-microbial coatings, we recommend that the display be cleaned with a damp cloth (do not spray liquids directly on the screen) using 70% isopropyl alcohol. This formula can also be used to clean the case, tray, and pens that students and teachers touch. According to the EPA, this will be effective against both bacteria and viruses that come into contact with the formula. This has also been tested to ensure the display coatings are also not compromised. Because the case surrounding the glass has liquid-sensitive electronics to track the movement of your pen and fingers, please take care not to expose them to moisture. Avoid using other cleaning products as this may damage the coatings on the screen which could compromise safety benefits.

Other BenQ interactive display safety features

All BenQ interactive displays have two additional safety certifications that are important to both education and corporate applications. These functions have also been tested and certified by TUV for effectiveness.

Low blue light


As any professional e-sports gamer or photo editor will confirm, excessive exposure to blue light is something to be avoided. Health researchers at Harvard University have expressed their concern over high levels of blue light, and CNN has reported on studies in Spain that may link excessive exposure to blue light to some types of cancer when exposed to blue light at night. BenQ displays all offer a low blue light mode to reduce your exposure to blue light from the display.

Flicker-free LED backlight


According to research done at the University of Essex in England, certain types of LED light may be responsible for headaches in the right conditions.  As one of the largest manufacturers of gaming and engineering monitors in the world, BenQ invented the world’s first flicker-free LED backlight for its displays in 2016.   This technology has now been certified by TUV for eliminating LED flicker, which is especially important when looking at larger displays sized above 75 inches.

Summary

While using a BenQ interactive display with an anti-microbial coating does not eliminate the risk of pathogens in a public space such as a classroom or collaboration space completely, its breakthrough nanoparticle technology, low blue light, and flicker-free backlight can be an important part of ensuring a safe and healthy environment for interactive collaboration.

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