发明名称 |
LOW-PRESSURE MERCURY DISCHARGE LAMP |
摘要 |
A low-pressure mercury discharge lamp of the invention comprises an envelope (1) that encloses a discharge space (2) in a gastight manner. The envelope is provided with a luminescent material (4) which is excitable with radiation of a wavelength of 254 nm. The envelope (1) is further provided with a further luminescent material (5) which has an excitation spectrum of which the value for a wavelength of 436 nm amounts to at least 10 % of that at a wavelenght of 254 nm, and which further luminescent material has an emission spectrum with a maximun in a wavelength range from 580 to 720 nm. The lamp of the invention has in a dimmed state of operation a color point of which the value of the x-coordinate is higher than in the nominal state of operation.
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申请公布号 |
WO9921214(A1) |
申请公布日期 |
1999.04.29 |
申请号 |
WO1998IB01567 |
申请日期 |
1998.10.08 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;PHILIPS AB |
发明人 |
OOMEN, EMMANUEL, WILHELMUS, JOHANNES, LEONARDUS |
分类号 |
C09K11/08;C09K11/56;C09K11/64;C09K11/66;C09K11/73;C09K11/78;C09K11/80;H01J61/44;H01J61/48;(IPC1-7):H01J61/48 |
主分类号 |
C09K11/08 |
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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