| 简介 |
PROBLEM TO BE SOLVED : To improve initial total luminous flux as a fluorescent lamp by coating a part of a surface of a phosphor particle which is a material for a phosphor film with metal compound fine particles.
SOLUTION : In this cold cathode fluorescent lamp, mercury and one or more kinds of rare gas are sealed in a glass tube 1, a pair of discharging electrodes 4 are provided at ends of the glass tube through the sealing wire 3, and the phosphor film 2 is formed from the phosphor particles 11 wherein the surfaces are coated with the metal compound 12 in an inner wall of the glass tube. The coating area of the metal compound 12 is set 10 to 40% to the surface area of the phosphor particles 11. Thereby, mercury adsorption to the phosphor is prevented with the coating of the part of the metal compound on the surface of the phosphor particle, and the initial total luminous flux can be improved.
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