Prototype of a Public Computer System with Fast Automatic Touchscreen Disinfection by Integrated UVC LEDs and Total Reflection DOI Creative Commons

Sebastian Deuschl,

Ben Sicks,

Helge Moritz

et al.

Published: Dec. 17, 2024

Public touchscreens, such as those used in automated teller machines or ticket payment systems, which are accessed by different people a short period of time, could transmit pathogens and thus spread infections. Therefore, the aim this study was to develop test prototype touchscreen system for public sector that disinfects itself quickly automatically between two users without harming any humans. A quartz pane installed front commercial 19" monitor, into 120 UVC LEDs emitted laterally. The plate acted light guide irradiated microorganisms on its surface, but—due total reflection—not user screen. near-infrared touch frame recognize touch. antibacterial effect tested through intentional staphylococcus contamination. prototype, composed Raspberry Pi microcomputer with display, touchscreen, frame, developed, simple game programmed briefly switched users. antimicrobial so strong 1% maximum LED current sufficient 99.9% reduction within 25 s. At 17.5% current, no bacteria were observed after 5 residual irradiance at distance 100 mm screen only 0.18 2.8 µW/cm2 currents, respectively. This would allow stay 287 18 min, even if emit continuously not be turned off few seconds presented device. fast, automatic disinfection is already possible today, higher durations below 1 s seems feasible, while approach virtually prevents direct irradiation human user.

Language: Английский

Future touchscreen disinfection by integrated UVC LEDs? DOI Open Access
Martin Heßling,

Klaus Noller,

Ben Sicks

et al.

PhotonicsViews, Journal Year: 2025, Volume and Issue: 22(1), P. 48 - 51

Published: Jan. 13, 2025

Abstract The application of touchscreens in the public and healthcare sectors is increasing worldwide. Their use by different people allows unintentional spread pathogens. combination UVC LEDs a quartz plate appears to make it possible rapidly automatically disinfect between users without harming human operator.

Language: Английский

Citations

0
One-Second Touchscreen Disinfection with Internal UVC-LEDs DOI Creative Commons

Klaus Noller,

Ben Sicks, Martin Heßling

et al.

Photonics, Journal Year: 2024, Volume and Issue: 11(11), P. 1001 - 1001

Published: Oct. 24, 2024

The transmission of pathogens via touchscreens is a concern both in medical environments regarding nosocomial infections and public spaces. This study presents the development self-disinfecting touchscreen system its implementation into an existing device. disinfection was achieved by irradiating UVC light laterally quartz front glass touchscreen. also included two-stage safety shutdown feature to protect users from exposure. To detect presence user’s hand, proximity sensor behind touch screen installed combination with input registration. A rapid staphylococci without compromising usability user safety. prototype demonstrated bacterial reduction 99.96% or 3.4 (±0.36) log levels less than 1 s. results suggest that technology has potential make significant contribution reducing healthcare settings beyond.

Language: Английский

Citations

1
Prototype of a Public Computer System with Fast Automatic Touchscreen Disinfection by Integrated UVC LEDs and Total Reflection DOI Creative Commons

Sebastian Deuschl,

Ben Sicks,

Helge Moritz

et al.

Published: Dec. 17, 2024

Public touchscreens, such as those used in automated teller machines or ticket payment systems, which are accessed by different people a short period of time, could transmit pathogens and thus spread infections. Therefore, the aim this study was to develop test prototype touchscreen system for public sector that disinfects itself quickly automatically between two users without harming any humans. A quartz pane installed front commercial 19" monitor, into 120 UVC LEDs emitted laterally. The plate acted light guide irradiated microorganisms on its surface, but—due total reflection—not user screen. near-infrared touch frame recognize touch. antibacterial effect tested through intentional staphylococcus contamination. prototype, composed Raspberry Pi microcomputer with display, touchscreen, frame, developed, simple game programmed briefly switched users. antimicrobial so strong 1% maximum LED current sufficient 99.9% reduction within 25 s. At 17.5% current, no bacteria were observed after 5 residual irradiance at distance 100 mm screen only 0.18 2.8 µW/cm2 currents, respectively. This would allow stay 287 18 min, even if emit continuously not be turned off few seconds presented device. fast, automatic disinfection is already possible today, higher durations below 1 s seems feasible, while approach virtually prevents direct irradiation human user.

Language: Английский

Citations

0
Prototype of a Public Computer System with Fast Automatic Touchscreen Disinfection by Integrated UVC LEDs and Total Reflection DOI Creative Commons

Sebastian Deuschl,

Ben Sicks,

Helge Moritz

et al.

Published: Dec. 17, 2024

Public touchscreens, such as those used in automated teller machines or ticket payment systems, which are accessed by different people a short period of time, could transmit pathogens and thus spread infections. Therefore, the aim this study was to develop test prototype touchscreen system for public sector that disinfects itself quickly automatically between two users without harming any humans. A quartz pane installed front commercial 19" monitor, into 120 UVC LEDs emitted laterally. The plate acted light guide irradiated microorganisms on its surface, but—due total reflection—not user screen. near-infrared touch frame recognize touch. antibacterial effect tested through intentional staphylococcus contamination. prototype, composed Raspberry Pi microcomputer with display, touchscreen, frame, developed, simple game programmed briefly switched users. antimicrobial so strong 1% maximum LED current sufficient 99.9% reduction within 25 s. At 17.5% current, no bacteria were observed after 5 residual irradiance at distance 100 mm screen only 0.18 2.8 µW/cm2 currents, respectively. This would allow stay 287 18 min, even if emit continuously not be turned off few seconds presented device. fast, automatic disinfection is already possible today, higher durations below 1 s seems feasible, while approach virtually prevents direct irradiation human user.

Language: Английский

Citations

0