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    • 11. 发明授权
    • LOW-PRESSURE MERCURY VAPOUR DISCHARGE LAMP
    • 低压汞蒸气放电灯
    • EP1048053B1
    • 2004-12-08
    • EP99955913.1
    • 1999-10-27
    • Koninklijke Philips Electronics N.V.
    • SNIJKERS-HENDRICKX, Ingrid, J., M.HILDENBRAND, Volker, D.ROES, Johannes, H.
    • H01J61/35H01J61/72H01J61/24
    • H01J61/24H01J61/35H01J61/72
    • Low-pressure mercury vapor discharge lamp provided with a discharge vessel (10). The discharge vessel (10) encloses a discharge space (11), provided with a filling of mercury and a rare gas, in a gastight manner. At least a part of an inner surface of the discharge vessel (10) is provided with a transparent layer (16) comprising an oxide of scandium, yttrium, or a rare earth metal (lanthanum, cerium, gadolinium, ytterbium, and/or lutetium). The discharge lamp is characterized in that the transparent layer (16) comprises a borate or a phosphate of an alkaline earth metal and/or of scandium, yttrium or a further rare earth metal. Preferably, the alkaline earth metal is calcium, strontium and/or barium. The further rare earth metal is preferably lanthanum, cerium and/or gadolinium. The oxide is preferably Y2O3 or Gd2O3. Preferably, the transparent layer (16) has a thickness of between 5 nm and 200 nm. A luminescent layer (17) is preferably provided on top of the transparent layer in the discharge vessel. The lamp according to the invention has a comparatively low mercury consumption.
    • 设置有放电容器(10)的低压汞蒸汽放电灯。 放电容器(10)以气密方式封闭放电空间(11),该放电空间(11)提供有汞和稀有气体的填充物。 放电容器(10)的内表面的至少一部分设置有透明层(16),该透明层包含钪,钇或稀土金属(镧,铈,钆,镱和/或l )。 放电灯的特征在于,透明层(16)包含碱土金属和/或钪,钇或另外的稀土金属的硼酸盐或磷酸盐。 优选碱土金属是钙,锶和/或钡。 另外的稀土金属优选是镧,铈和/或钆。 氧化物优选为Y 2 O 3或Gd 2 O 3。 优选地,透明层(16)具有5nm和200nm之间的厚度。 发光层(17)优选设置在放电容器中的透明层的顶部。 根据本发明的灯具汞消耗量相对较低。