FLUORESCENT LAMP

• Main Authors: TOKUNAGA MASUNORI, HARADA REIO
• Format: Patent
• Language: English; Japanese
• Published: 04.02.2016
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; DYES; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

PROBLEM TO BE SOLVED: To provide a fluorescent lamp which can be manufactured in an inexpensive manner in view of the cost and which enables the reduction in color difference at tube ends.SOLUTION: A fluorescent lamp comprises: a glass tube; electrodes at opposing ends of the glass tube; and a phosphor layer provided on an inner face of the glass tube. The phosphor layer includes a phosphor layer making the first layer on the side of the glass tube, and a phosphor layer making the second layer on the side of a discharge space. As the first layer composed of the phosphor layer, a phosphor layer including a calcium halophosphate phosphor as a primary component is provided. As the second layer composed of the phosphor layer, a phosphor layer including a rare earth-activated phosphor as a primary component is provided. The viscosity of a fluorescence coating material used in producing the second layer composed of the phosphor layer is 110 mPas or larger.SELECTED DRAWING: Figure 2 【課題】本発明は、管端色差を低減し安価なコストで製造できる蛍光ランプの提供を目的とする。【解決手段】ガラス管と、該ガラス管の両端部に電極を有し、前記ガラス管内面に蛍光体層を設ける蛍光ランプにおいて、前記蛍光体層は前記ガラス管側の第１層目蛍光体層と放電空間側の第２層目蛍光体層とからなり、第１層目蛍光体層にはハロリン酸カルシウム蛍光体を主成分とした蛍光体層を設け、第２層目蛍光体層には希土類付活蛍光体を主成分とした蛍光体層を設け、前記第２層目蛍光体層を生成する際に使用する蛍光塗料の粘度が１１０ｍＰａｓ以上である。【選択図】図２