发明名称 |
FLUORESCENT SUBSTANCE AND FLUORESCENT DISPLAY TUBE |
摘要 |
PURPOSE: To provide a yellow light emitting fluorescent substance useful for a fluorescent display tube excluding cadmium. CONSTITUTION: The addition amount of Eu in a conventional red light emitting fluorescent substance of La2O2S:E is 0.2-5 mol.%. The addition amount of Eu in this fluorescent substance is 0.001-0.1 mol.% per 1 mole of a base. A life property of the fluorescent substance is tested by packaging it in a low-voltage driven fluorescent display tube. Yellow light emission of good color purity is obtained and the excellent life property is clarified. A square mark in the figure 2 shows brightness persistence after continuous lighting for 1,000 hrs. The brightness persistence of 75-105% is ensured in Eu concentration of 0.1-0.001 mol.% compared to that of 50% of Eu in conventional fluorescent substance of 1 mol.% Eu concentration.
|
申请公布号 |
KR20020022590(A) |
申请公布日期 |
2002.03.27 |
申请号 |
KR20010057652 |
申请日期 |
2001.09.18 |
申请人 |
FUTABA DENSHI KOKYO K.K. |
发明人 |
HAMADA TAKUYA;KITAGAWA KAZUNORI;TOKI HITOSHI |
分类号 |
C09K11/84;C09K11/77;C09K11/78;H01J29/20;H01J31/15;(IPC1-7):C09K11/78 |
主分类号 |
C09K11/84 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|