Anti-bacterial lighting apparatus
a lighting apparatus and antibacterial technology, applied in lighting and heating apparatus, metal/metal-oxide/metal-hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problems of fixtures rendering no antibacterial effect, germicidal operation cannot take place, and the effect of titanium oxide anatase typ
Active Publication Date: 2018-11-06
ALEDDRA INC
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Benefits of technology
The patent text describes a lighting device that uses anti-bacterial particles called nano silver and photocatalytic particles to kill bacteria on the lens of the device. This technology is active even when the light source is turned off, and can be enhanced when the light source is turned on. The lighting device also uses LED technology that has residual UV rays that can activate the anti-bacterial particles. The thickness of the anti-bacterial composite film is limited to maintain good lighting levels. The patent text provides a solution to address the issue of bacteria being present on lighting devices and potentially spreading infections.
Problems solved by technology
One main limitation of this anti-bacterial lighting device is that the germicidal operation can only take place when there is light shining through the photocatalytic film.
When the light is turned off, the fixtures render no anti-bacterial benefit.
Another issue that necessitates a closer inspection of the lighting device by Soma, R., et al. is the effectiveness of the anatase-type titanium oxide.
Soma, R., et al., in U.S. Pat. No. 6,242,752 did not address the difference in the photocatalytic effectiveness of different particle shapes of the anatase-type titanium oxide, nor the differing amounts of UV light spectral power as needed by the different particles shapes of the anatase-type titanium oxide for generating the same photocatalytic germicidal effect.
The coating of the composite film will have the inevitable effect of reducing the light level passing through the lens.
Method used
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[0027]FIG. 4 is an embodiment of the lighting apparatus of the present disclosure in a form of an LED tubular lamp 100. The cross-section view 101 shows that the multiple LED light sources 102 is completed enclosed by one circular lens 103, and an anti-bacterial composite film 104 comprised of photocatalytic particles and nano silver particles is formed on the majority part of the outer surface of the lens 103. The anti-bacterial composite film 104 could cover the entire outer surface of the lens to maximize the anti-bacteria effect. Alternatively, the lens 103 may cover only the section above the LED PCB board and a heat-sink, connected with the lens 103, may cover the section below the LED PCB board. The material of the lens 103 can be plastic, polycarbonate, glass, or any transparent or translucent material with good light transmittance. Any lamp with any form factor can be coated with an anti-bacterial composite film of photocatalytic particles and nano silver particles on its l...
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Abstract
A lighting apparatus that includes at least one light source and at least one transparent or translucent lens, and at least one anti-bacterial composite film. The anti-bacterial composite film that includes photocatalytic particles and nano silver particles is formed on at least a part of the outer surface of the lens. With this anti-bacterial composite film, the lighting apparatus retains its germicidal function when the light source is turned off. Moreover, at least 95% of the spectral power distribution (SPD) of the light source comes from the visible light wavelength range (>400 nm). Artificial light sources such as LED can also be used with the anti-bacterial lighting apparatus.
Description
BACKGROUNDTechnical Field[0001]The present disclosure pertains to the field of lighting devices and, more specifically, proposes an anti-bacterial lighting apparatus.Description of Related Art[0002]Photocatalysts are known to become active under ultraviolet light and kill bacteria by breaking down the cell wall of the bacteria. Soma, R., et al., in U.S. Pat. No. 6,242,752 teaches the use of a photocatalytic film made of anatase-type titanium oxide (TiO2) on the lens of a lighting device such that, as the light originating from the lighting device shines through the titanium oxide film, the UV rays of the light activate the photocatalyst, causing it to break down the bacteria cell wall and resulting in the killing of the bacteria. One main limitation of this anti-bacterial lighting device is that the germicidal operation can only take place when there is light shining through the photocatalytic film. When the light is turned off, the fixtures render no anti-bacterial benefit.[0003]An...
Claims
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IPC IPC(8): B01J35/00B01J23/50F21V3/04B01J21/06H05B33/08H05B44/00
CPCB01J35/004B01J21/063F21V3/04H05B33/0803B01J23/50F21K9/64F21V9/40F21V5/04F21V33/00F21Y2115/10H05B45/00B01J35/39B01J35/23
Inventor MAA, CHIA-YIUYU, CHUN-TE
Owner ALEDDRA INC
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