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AssigneesDai Nippon Toryo Co., Ltd., Nippon Hoso Kyokai
InventorsKoichi Takahashi, Kinichiro Narita, Akiyasu Kagami, Takashi Hase, Yoshiyuki Mimura, Yoshinori Tanigami, Junro Koike, Ryuya Toyonaga, Takehiro Kojima
Estimating the term…
In an air-tight at least partially transparent container, a phosphor, a gas or gas mixture and a pair of discharging electrodes are contained. The discharge gap is in the range of 0.1 to 3.0mm, and the pressure of the gas or gas mixture sealed in the container is such that the product of the pressure and the discharge gap is in the range of 30 to 300 Torr.mm. The gas or gas mixture has discharge radiation spectra within the region of wavelength shorter than 200nm. The phosphor is a manganese activated aluminate phosphor represented by the formula (M.sup.II.sub.1-x, Mn.sub.x ) O.multidot.zAl.sub.2 O.sub.3 where M.sup.II is selected from a group consisting of calcium, strontium, barium, magnesium and zinc, and x and z are numbers within the ranges of 10.sup.-3 .ltoreq.x.ltoreq.7.times.10.sup.-1 and 1.ltoreq.z.ltoreq.20, respectively.
A gaseous discharge light emitting element comprising an air-tight at least partially transparent container, a pair of discharge electrodes provided in said container, the discharge gap between said electrodes being in the range of 0.1 to 3.0 mm, a gas or gas mixture having discharge radiation spectra within the region of wavelength shorter than 200nm sealed in said container, the pressure of said gas or gas mixture being such that the product of the pressure and said discharge gap is in the range of 30 to 300 Torr.multidot.mm, and a phosphor disposed in said container, said phosphor having a high radiation efficiency under vacuum ultraviolet ray excitation and comprising a manganese activated aluminate phosphor represented by the formula:
Dependencies are inferred from the claim text.