UV-Turning Display Structure for Surface Sterilization Without UV Damage
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Solution Overview
Problem
Conventional UV light sterilization methods for display devices in public places are ineffective for immediate sterilization upon touch and can damage the display components due to continuous UV light exposure, posing risks to both the device and users.
Innovation Solution
A self-sterilizing display device with a UV light source, light-incident layer, and turning layer that redirects UV light to the outer surface for sterilization, while using reflective and light-absorbing layers to prevent UV light from entering the display components, ensuring effective sterilization without damaging the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV light is continuously emitted for sterilization, then surface sterilization effect is improved, but display components are damaged and service life is reduced
Solution Approach 1:
The patent segments the UV light path by introducing a light-incident layer and turning layer that separate the sterilization function from the display components. The UV light is directed to reflect off the turning layer toward the outer surface, preventing direct exposure of display components to continuous UV irradiation while maintaining sterilization effectiveness.
Solution Approach 2:
The light-incident layer and turning layer act as intermediary elements between the UV light source and the display components. These layers guide and redirect UV light to the outer surface for sterilization without allowing direct contact between UV light and sensitive display components, thus protecting them from damage.
2Reliability
If UV light is continuously emitted for sterilization, then surface sterilization effect is improved, but human eyes and skin are exposed to harmful UV leakage
Solution Approach 1:
The light-incident layer and turning layer serve as intermediary structures that control UV light direction. They ensure UV light is redirected toward the outer surface for sterilization while preventing unintended leakage toward users, thus reducing harmful exposure to human eyes and skin.
Solution Approach 2:
The patent applies local quality by designing specific regions (light-incident layer and turning layer) with optical properties tailored to redirect UV light. These localized structures ensure UV light is directed where needed for sterilization while being contained away from areas where it could harm users.
3Reliability
If UV light is emitted from inside the display device, then surface sterilization is achieved, but UV light may leak forward and damage display components
Solution Approach 1:
Instead of allowing UV light to travel directly forward from the light source, the patent inverts the light path by introducing a turning layer that reflects UV light backward toward the outer surface. This inversion of the light direction prevents forward leakage while achieving sterilization.
Solution Approach 2:
The patent segments the optical path into distinct regions: the light source region, the light-incident layer, the turning layer, and the outer surface. This segmentation allows precise control of UV light direction, ensuring it is redirected to the outer surface without leaking forward to damage display components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves rapid and comprehensive surface sterilization without significantly reducing the display's service life by redirecting UV light to the outer surface, protecting the internal components from damage and user exposure.
Implementation Method 1
allows most of the UV light to undergo total internal reflection within the display device based on the principle of total internal reflection, so that the UV light spreads across the surface of the display device
Implementation Method 2
The light source is disposed at a periphery of the light-incident layer, and a light-emitting surface of the light source faces to the light-incident layer
Implementation Method 3
the turning layer is a plasma coating film resistant to the UV light. the plasma coating film has a transmittance less than 65% in a wavelength range of 200-280 nm
Implementation Method 4
a plurality of light-absorbing particles, configured to absorb the UV light, are distributed inside the adhesive layer
Implementation Method 5
the reflective layer is configured to change the direction of the optical path of the UV light
Data Source
AI summary
A self-sterilizing display device is applied to self-sterilizing with a UV light. The self-sterilizing display device includes a display, a light-incident layer, a light source, and a turning layer. The light-incident layer is disposed above the display. The light source is disposed at a periphery of the light-incident layer, and a light-emitting surface of the light source faces to the light-incident layer. The turning layer is disposed on a lower surface of the light-incident layer. Herein, the light source can emit the UV light toward the light-incident layer for sterilizing an outer surface of the self-sterilizing display device by irradiation, and the turning layer can change the direction of an optical path of the UV light. Therefore, the surface can be sterilized by UV light, and the UV light can be prevented or reduced from being incident on the display below and damaging the display.