发明名称 |
Lamp and portable lighting device |
摘要 |
A phosphorescent layer comprising a phosphorescent compound and a binder resin is provided at least on the front surface of a bulb in order to provide a lamp having phosphorescent layer with improved strength and durability and also an improved recognizability even after turning off the light. A portable lighting device having the lamp is also provided. A phosphorescent layer is applied to the front surface of a single-end bulb of a lamp in the range from ¼ to ½ of the bulb surface area. The phosphorescent layer mainly comprises strontium aluminate (SrAl2O4). This material is added to a solution dissolving a binder resin and mixed to provide a paint, and the paint is applied to a predetermined position of the lamp. For the application, the single-end bulb is dipped in the paint and dried to evaporate the solvent. The paint preferably comprises 1-50 weight parts of the binder resin to 100 weight parts of the phosphorescent compound.
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申请公布号 |
US6359381(B1) |
申请公布日期 |
2002.03.19 |
申请号 |
US19990271501 |
申请日期 |
1999.03.18 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
OKUNO SHIGEYOSHI;HASHIDA MORIO;KAMITANI HITOSHI |
分类号 |
H01K1/32;F21V9/16;H01J61/44;(IPC1-7):H01J1/62;H01J1/32 |
主分类号 |
H01K1/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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