Fluorescent lamp

Abstract

Abstract PURPOSE:To obtain a fluorescent lamp capable of keeping the intensity and color of light during the whole life and having improved light intensity, by mixing a blue-light emitting fluorescent material composed of a specific Eu- doped alkali metal aluminate with two kinds of materials having specific respective fluorescent wavelength range and applying the mixture to the inner surface of a fluorescent lamp tube. CONSTITUTION:(A) The first material which is a blue-light emitting fluorescent material composed of a Eu<2+>-doped alkaline earth metal aluminate of formula (MI is Sr, Ca or Pb; MII is Mg or Zn; 0.01<=a<=1.0; 0<=b<=1.5; 3.5<x<5; 28<=y<35) is mixed with (B) the second material having a spectral energy distribution having an intensity peak in the wavelength range of 530-550nm and (C) the third material having a spectral energy distribution having an intensity peak in the wavelength range of 600-620nm and applying the mixture to the inner wall of a tube to obtain the objective fluorescent lamp.

Inventors

• 👤 Shigeru Kamiya
• 👤 茂 神谷
• 👤 Takashi Yamamoto
• 👤 山本　高詩
• 👤 Katsuaki Iwama
• 👤 克昭 岩間
• 👤 Haruo Shibata
• 👤 柴田　治男
• 👤 Yoshinori Otaka
• 👤 大高　良憲
• 👤 Osamu Takano
• 👤 治 高野
• 👤 Mutsuo Takahashi
• 👤 高橋　睦夫

Bibliographic Details