Abstract

The present invention provides a safe ultraviolet light irradiation device which uses ultraviolet light that is safe to the human body, and which has a wide range of microorganism elimination and sterilization effects. Disclosed is an ultraviolet light emitting element provided with: an electrode substrate that has a pair of electrodes; at least one cylindrical or flattened cylindrical glass tube that is disposed on the electrode substrate so as to face both of the electrodes, the glass tube having both end parts sealed; a discharge gas which is sealed inside the glass tube and contains a xenon gas that generates a discharge due to a voltage applied to the electrodes; and a phosphor layer which is formed on the inner surface of the glass tube and emits light when excited by the discharge. The glass tube is formed of borosilicate glass or quartz glass. The phosphor layer is formed of a phosphoric acid-based fluorescent material, and has an emission spectrum which has a peak half-value width within the wavelength range of 50 nm or less, with the peak being at a wavelength of 230 ± 10 inm on an illuminance basis.

IPC Classes  ?

• H01J 65/00 - Lamps without any electrode inside the vesselLamps with at least one main electrode outside the vessel
• A61L 9/20 - Ultraviolet radiation
• H01J 61/16 - Selection of substances for gas fillingsSpecified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent
• H01J 61/30 - VesselsContainers
• H01J 61/44 - Devices characterised by the luminescent material

Abstract

The present invention provides a deep ultraviolet radiation apparatus that is safe and has a high bacteria eliminating effect. The present invention provides a deep ultraviolet radiation apparatus that is safe and has a high bacteria eliminating effect. The ultraviolet radiation apparatus comprises an optical filter that prevents the transmission of ultraviolet light of 240 nm or more emitted from a phosphor, wherein the optical filter is arranged facing light emitting surfaces of a gas-discharging tube array-type surface-emitting ultraviolet light source device comprising phosphor layer having a broad emission spectrum with a wavelength width of at least 210 nm to 250 nm with a peak wavelength of 228 nm. Light irradiated from the light source device is incident on a filter membrane with an incident angle thereof being altered by a transparent substrate of the optical filter. An ozone generation space may be formed between the surface-emitting ultraviolet light source device and the optical filter.

IPC Classes  ?

• F21V 9/06 - Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out ultraviolet radiation
• A61L 2/10 - Ultraviolet radiation
• A61L 2/20 - Gaseous substances, e.g. vapours

Abstract

The present invention provides a deep ultraviolet radiation apparatus that is safe and has a high bacteria eliminating effect.　Provided is an ultraviolet radiation apparatus in which an optical filter, that prevents the transmission of ultraviolet light of 240 nm or more emitted from a phosphor, is arranged facing the light emitting surface of a gas-discharging tube array-type surface-emitting ultraviolet light source device formed with a broad emission spectrum phosphor layer having a wavelength width of at least 210-250 nm, with a peak wavelength of 228 nm. Light irradiated from the light source device is incident on a filter membrane with the incident angle thereof being altered by a transparent substrate of the optical filter. An ozone generation space may be formed between the surface-emitting ultraviolet light source device and the optical filter.

IPC Classes  ?

• H01J 65/00 - Lamps without any electrode inside the vesselLamps with at least one main electrode outside the vessel
• A61L 2/10 - Ultraviolet radiation
• A61L 2/20 - Gaseous substances, e.g. vapours
• F21V 9/06 - Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out ultraviolet radiation
• H01J 61/30 - VesselsContainers
• H01J 61/44 - Devices characterised by the luminescent material
• H01J 61/52 - Cooling arrangementsHeating arrangementsMeans for circulating gas or vapour within the discharge space

Abstract

Provided is an ozone generator for sterilization, which exhibits high safety in usage environments such as bactericidal and deodorizing environments and exhibits good user-friendliness.　In this ozone generator for sterilization, a mercury-free gas discharge tube array is used as a vacuum ultraviolet radiation surface light source device for generating ozone. The mercury-free gas discharge tube array is configured by arranging a plurality of gas discharge tubes in parallel on an electrode substrate having a common electrode pair, each of the gas discharge tubes housing a noble gas that emits vacuum ultraviolet radiation and having an ultraviolet radiation reflection layer formed on the inner wall surface of the tube on the back surface side. By disposing a ventilation fan directly opposite a light-emitting surface, it is possible to efficiently clean contaminants deposited on the light-emitting surface and cool the light source device.

IPC Classes  ?

• C01B 13/11 - Preparation of ozone by electric discharge
• H01J 63/04 - Vessels provided with luminescent coatingsSelection of materials for the coatings
• H01J 65/00 - Lamps without any electrode inside the vesselLamps with at least one main electrode outside the vessel
• H01J 61/52 - Cooling arrangementsHeating arrangementsMeans for circulating gas or vapour within the discharge space

Abstract

A light-emitting tube array-type light source device includes: a plurality of light-emitting gas discharge tubes 11; and an electrode substrate 30 supporting the light-emitting gas discharge tubes in parallel on an upper surface thereof, the electrode substrate having a plurality of slits partially exposes a bottom surface of each light-emitting tube, thereby the light-emitting gas discharge tubes can be cooled through the slits.

IPC Classes  ?

• H01J 65/04 - Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating
• H01J 61/06 - Main electrodes
• H01J 61/30 - VesselsContainers
• H01J 61/92 - Lamps with more than one main discharge path
• H01J 61/33 - Special shape of cross-section, e.g. for producing cool spot