Abstract: 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.

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.

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.

Abstract: During a normal operation, alternating drive voltage to be applied between a pair of electrodes provided to face an outer surface of a bottom part of a gas discharge light emitting tube is switched to a voltage value V2 lower than a voltage value V1 at the time of starting lighting. Further, the alternating drive voltage to be applied during the normal discharge operation is intermittently applied in a predetermined cycle and duty ratio to enable adjustment of light emission intensity.

Abstract: During a normal operation,alternating drive voltage to be applied between a pair of electrodes provided to face an outer surface of a bottom part of a gas discharge light emitting tube is switched to a voltage value V2 lower than a voltage value V1 at the time of starting lighting. Further, the alternating drive voltage to be applied during the normal discharge operation is intermittently applied in a predetermined cycle and duty ratio to enable adjustment of light emission intensity.

Abstract: A gas discharge device includes a thin glass tube filled with a discharge gas; a pair of first and second long electrodes extending toward either side along a longitudinal direction with a discharge gap interposed therebetween are provided outside of a back side flat surface of a thin glass tube; and a ultraviolet phosphor layer formed on an inner surface at the back side flat surface, the thin glass tube filled with a discharge gas having a front side flat surface and the back side flat surface facing each other on a transverse section, wherein, starting with trigger discharge that is initially generated in the discharge gap as a result of a voltage increase when a voltage with a sine waveform or an inclined waveform is applied between both electrodes, the discharge gradually extends so as to move in the longitudinal direction of the electrodes.

Abstract: The object of this invention is to provide a gas discharge device which has a simple configuration, inexpensive, and has excellent luminous efficiency, for an ultraviolet or visible light source. The invention provides a gas discharge device in which first and second long electrodes extending toward either side along a longitudinal direction with a discharge gap interposed therebetween are provided outside of a back side flat surface of a thin glass tube, the thin glass tube filled with a discharge gas having a front side flat surface and the back side flat surface facing each other on a transverse section, wherein, starting with trigger discharge that is initially generated in the discharge gap as a result of a voltage increase when a voltage with a sine waveform or an inclined waveform is applied between both electrodes, the discharge gradually extends so as to move in the longitudinal direction of the electrodes.

Abstract: The present invention provides an ultraviolet light irradiation device having a planer UV light source in which the irradiation intensity of UV light can be adjusted finely in a wider range. The ultraviolet light irradiation device of the present invention comprises an UV light source and a housing that holds the planer UV light source. In the UV light source, a plurality of thin plasma tubes, each of which has an UV phosphor layer formed therein, are arranged in parallel with each other on an electrode support sheet, and drive circuits apply a pulse voltage to electrode pairs provided between the electrode support sheet and an array of the thin plasma tubes. A control circuit controls a factor of the pulse voltage to be applied to the electrode pairs so as to adjust the irradiation intensity of the UV light.

Abstract: The present invention provides an ultraviolet light irradiation device having a planer UV light source in which the irradiation intensity of UV light can be adjusted finely in a wider range. The ultraviolet light irradiation device of the present invention comprises an UV light source and a housing that holds the planer UV light source. In the UV light source, a plurality of thin plasma tubes, each of which has an UV phosphor layer formed therein, are arranged in parallel with each other on an electrode support sheet, and drive circuits apply a pulse voltage to electrode pairs provided between the electrode support sheet and an array of the thin plasma tubes. A control circuit controls a factor of the pulse voltage to be applied to the electrode pairs so as to adjust the irradiation intensity of the UV light.

Abstract: A full color three electrode surface discharge type plasma display device that has fine image elements and is large and has a bright display. The three primary color luminescent areas are arranged in the extending direction of the display electrode pairs in a successive manner and an image element is composed by the three unit luminescent areas defined by these three luminescent areas and address electrodes intersecting these three luminescent areas. Further, phosphors are coated not only on a substrate but also on the side walls of the barriers and on address electrodes. The manufacturing processes and operation methods of the above constructions are also disclosed.

Abstract: A light emitting portion and an electrode board including electrodes for driving the light emitting portion for light emission are provided as separate members. This allows the light emitting portion to have a smaller thickness, and widens the choices of substrate materials for the electrode board. Therefore, a flexible material can be used for the electrode board, thereby imparting the display device with flexibility. Further, the light emitting portion and the electrode board can be separately produced, so that the degree of freedom is increased in the production of the display device. Therefore, the light emitting portion and the electrode board can be produced in different steps or in different production lines. Further, the light emitting portion, the electrode board and other components can be individually evaluated for quality, thereby reducing the production costs of the display device.

Abstract: A photochromic includes a laminated film including a composite oxide film composed of at least two elements selected from the group consisting of Ti, Mn, Co, Ni, Zn, and Sn, and the group consisting of Mg, Al, and Si, respectively, and a transparent conductive film, wherein the light transmission property is changed by UV irradiation.

Abstract: According to the present invention, there is provided a method for forming a metal oxide film comprising, when a metal oxide film is formed by conducting a thermal treatment on a coating film containing an organic metal compound formed on an inner wall of a tube, performing an ultraviolet irradiation treatment or an ozone treatment on the coating film prior to or simultaneously with the thermal treatment.

Abstract: A full color three electrode surface discharge type plasma display device that has fine image elements and is large and has a bright display. The three primary color luminescent areas are arranged in the extending direction of the display electrode pairs in a successive manner and an image element is composed by the three unit luminescent areas defined by these three luminescent areas and address electrodes intersecting these three luminescent areas. Further, phosphors are coated not only on a substrate but also on the side walls of the barriers and on address electrodes. The manufacturing processes and operation methods of the above constructions are also disclosed.

Abstract: A full color three electrode surface discharge type plasma display device that has fine image elements and is large and has a bright display. The three primary color luminescent areas are arranged in the extending direction of the display electrode pairs in a successive manner and an image element is composed by the three unit luminescent areas defined by these three luminescent areas and address electrodes intersecting these three luminescent areas. Further, phosphors are coated not only on a substrate but also on the side walls of the barriers and on address electrodes. The manufacturing processes and operation methods of the above constructions are also disclosed.

Abstract: A full color three electrode surface discharge type plasma display device that has fine image elements and is large and has a bright display. The three primary color luminescent areas are arranged in the extending direction of the display electrode pairs in a successive manner and an image element is composed by the three unit luminescent areas defined by these three luminescent areas and address electrodes intersecting these three luminescent areas. Further, phosphors are coated not only on a substrate but also on the side walls of the barriers and on address electrodes. The manufacturing processes and operation methods of the above constructions are also disclosed.

Abstract: A full color three electrode surface discharge type plasma display device that has fine image elements and is large and has a bright display. The three primary color luminescent areas are arranged in the extending direction of the display electrode pairs in a successive manner and an image element is composed by the three unit luminescent areas defined by these three luminescent areas and address electrodes intersecting these three luminescent areas. Further, phosphors are coated not only on a substrate but also on the side walls of the barriers and on address electrodes. The manufacturing processes and operation methods of the above constructions are also disclosed.

Abstract: A method for forming a coating film on an internal surface of an elongated tube, includes longitudinally holding the elongated tube, applying a coating solution to the internal surface of the elongated tube; and drying the coating solution while carrying out a heat process for sequentially heating the elongated tube by using a heat source. The heat process includes adjusting the descending rate of the heat source so that a through-hole in the elongated tube is clogged with the coating solution whose viscosity is reduced by heating of the heat source, and sucking the through-hole in the elongated tube from the lower side thereof so that a portion of the through-hole that is clogged with the coating solution moves downwards along the elongated tube.

Abstract: A photochromic includes a laminated film including a composite oxide film composed of at least two elements selected from the group consisting of Ti, Mn, Co, Ni, Zn, and Sn, and the group consisting of Mg, Al, and Si, respectively, and a transparent conductive film, wherein the light transmission property is changed by UV irradiation.

Abstract: A gas discharge tube has a phosphor layer formed and a discharge gas enclosed within an elongated tube which is to serve as the gas discharge tube. The gas discharge tube includes a light-emitting section and a cleaning section for cleaning the discharge gas. The cleaning section is connected to the light-emitting section.