CN1041363C - 无电极低压水银蒸汽放电灯 - Google Patents

无电极低压水银蒸汽放电灯 Download PDF

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Publication number
CN1041363C
CN1041363C CN92103365A CN92103365A CN1041363C CN 1041363 C CN1041363 C CN 1041363C CN 92103365 A CN92103365 A CN 92103365A CN 92103365 A CN92103365 A CN 92103365A CN 1041363 C CN1041363 C CN 1041363C
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Prior art keywords
conductive layer
pressure mercury
lamp
discharge vessel
discharge
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Expired - Fee Related
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CN92103365A
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CN1066529A (zh
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J·R·M·贝赫富特
F·A·S·利特哈特
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Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/048—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using an excitation coil
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/2806—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without electrodes in the vessel, e.g. surface discharge lamps, electrodeless discharge lamps
    • H05B41/2813—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

一种无电极低压水银蒸汽放电灯，其放电容器配置有磁性材料芯和绕芯安置的绕圈，该线圈连接到一个高频电源单元。一层抑制干扰的透明导电层置于放电容器的外部。该导电层通过一个导电体连接到电源线。导电体包括一个或串联连接的多个电容器，以保持在灯工作过程中安全地触及导电层。

Description

无电极低压水银蒸汽放电灯
本发明涉及一种无电极低压水银蒸汽放电灯。
上述这种灯已由美国专利4,568,859(PHN 10.540)所公开。
该已知的放电灯具有一个封闭的放电容器，放电容器中充有水银和稀有气体，并配置有一个磁性材料芯和绕芯放置的线圈，该线圈连接到一个高频电源单元，绕着放电区的放电容器壁具有一层抑制干扰的、透明的导电层，这层导电层经过导电体连接到电源线两极之一上。
在这种已知的灯中，磁性材料芯和环绕的线圈置于放电容器的空腔中。透明导电层是在放电容器的内壁上。与导电层相连的导电体穿过放电容器壁通到外部，并在灯工作期间与电源线两极之一相连。按这种方式，可以使渗出灯外的高频干扰电场减小到可接受的电平。
这种已知的灯的一个问题是导电体穿过放电容器壁引出的问题。这种贯穿引出使得灯的结构复杂并且价贵。此外，在灯工作期间，在玻璃中的贯穿引出区域中，因所用材料的膨胀系数的差别，容易产生应力。因此，无法预计放电容器泄漏的危险。
本发明的目的是提供一种改进的无电极低压水银蒸汽放电灯，它具有简单而可靠的结构。
通过一种无电极低压水银蒸汽放电灯实现了本发明的上述目的，这种放电灯具有一个封闭的放电容器，该放电容器中充有水银和稀有气体，并置有磁性材料芯和绕芯安置的线圈，该线圈被连接到一个高频电源单元，绕着放电区的放电容器壁具有一层抑制干扰的、透明的导电层，这层导电层经过导电体连接到电源线两极之一上，其特征在于，导电层置于放电容器的外壁上，导电体中包括有一个电容器或串联连接的多个电容器，以保证在灯工作过程中能安全地接触导电层。
按这种方式，可以避免使用贯穿引出，同时能在灯工作期间安全地以手触及灯。
一个电容器的阻抗为 1 2 πfC 式中，f为频率而C为电容器的电容量。自电源线的火线端(f为50赫或60赫)看去，导电体中的电容器呈现出相当高的阻抗，使得在触及导电层时，通过电容器和导电层的电流相当小。由导电层看去，虽然在导电层中产生了高频(例如f为2.65兆赫)干扰电流，由于电容器呈现低阻抗，使得这些干扰电流能够容易地排放到电源线中。
根据本发明的无电极低压水银蒸汽放电灯的一个优选实施例，其特征在于，电容器或多个电容器的总电容量最大为5,000微微法。
这已经考虑了在触及导电层时仍然安全的电流强度标准，即最大电流强度为0.5毫安。
将参考附图对本发明作更为详细的描述。
附图示意性地并且未按真实尺寸表明了一种无电极低压水银蒸汽放电灯，它具有以气密状态密封并且充有水银和稀有气体的玻璃放电容器1。放电容器1具有泡壳2和空腔3。在空腔3中置有棒状磁性材料(铁氧体)芯4和绕芯放置的线圈5，线圈5通过电源线7和8连接到一个高频电源单元6。电源单元6包含一个电路，例如在已向公众公开的荷兰专利申请8004175(PHN9803)中所描述的电路。
在放电容器1内，在泡壳2和空腔3的壁上有一层发光层9，它包括例如说如下三种发光材料的混合物：由三价铕激活的氧化钇红色发光物质、由三价铽激活的铈-镁铝酸盐绿色发光质、及由二价铕激活的钡-镁铝酸盐兰色发光物质。
透明导电层10置于泡壳2外部，该导电层由例如锡掺杂的氧化铟构成，并且通过导电体11连接到电源线的端头A(零线或火线)，电容器12包括在该导电体11中。电源单元6通过导体13和14连接到电源线的端头A和B。
在灯工作期间，在磁性材料芯4上的线圈5产生高频磁场。由此磁场在放电容器1中感应的电场确保在放电容器中维持水银的放电，从而产生紫外线辐射。紫外线辐射的主要部分通过发光层9转换为可见光辐射。
由放电容器1传到灯外的高频干扰辐射在透明导电层10中产生高频干扰电流。因为连接于导电层10的导电体11当中的电容器12对高频干扰电流呈现低阻抗，上述干扰电流被排放到电源线的端头A。进而，电容器12具有这样的电容量，即要使得从电源看去，一旦触及导电层10时，电容器对电源频率呈现高阻抗。不会有比触及灯时能保证安全的小电流更大的电流由电源火线端流过电容器12和导电层10。
如果使用了如图所示的单绕线圈5，导电层10实际上具有10到100欧姆的方块电阻R□。对于电容器12，电容量可选择在例如为1,000微微法的数值。也可能将两个电容器串联连接。每一个电容具有2,000微微法。
如果线圈使用如美国专利4,710,678(PHN11.016)的图2所示的双绕组，将产生较小的干扰辐射。导电层10会具有较厚的结构，结果就会有较高的方块电阻值R□，例如在100到1000欧姆之间。在这种情况下，电容器12可以具有例如100微微法的电容量，在两个电容器串联使用时，每一个具有200微微法的电容量。
在所有的情况下，总的电容值不超过5,000微微法，以保证最大为0.5毫安的安全极限。
在附图中，电容器12是直接连接到电源线的。很明显，也可能不直接把电容器12连接到电源线，而是通过电源单元6的适当点连到电源线。

Claims (2)

1.一种无电极低压水银蒸汽放电灯，它具有一个封闭的放电容器，该放电容器中充有水银和稀有气体，并置有磁性材料芯和绕芯安置的线圈，该线圈被连接到一个高频电源单元，绕着放电区的放电容器壁具有一层抑制干扰的、透明的导电层，这层导电层经过导电体连接到电源线两极之一上，其特征在于，导电层置于放电容器的外壁上，导电体中包括有一个电容器或串联连接的多个电容器，以保证在灯工作过程中能安全地接触导电层。
2.一种如权利要求1所述的无电极低压水银蒸汽放电灯，其特征在于，所述电容器或多个电容器的总电容量最大为5,000微微法。
CN92103365A 1991-05-08 1992-05-05 无电极低压水银蒸汽放电灯 Expired - Fee Related CN1041363C (zh)

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EP91201106.1 1991-05-08
EP91201106 1991-05-08

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CN1066529A CN1066529A (zh) 1992-11-25
CN1041363C true CN1041363C (zh) 1998-12-23

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US (1) US5239238A (zh)
EP (1) EP0512622B1 (zh)
JP (1) JPH05144418A (zh)
CN (1) CN1041363C (zh)
DE (1) DE69206037T2 (zh)
HU (1) HU208387B (zh)

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Also Published As

Publication number Publication date
EP0512622B1 (en) 1995-11-15
US5239238A (en) 1993-08-24
HU9201496D0 (en) 1992-08-28
JPH05144418A (ja) 1993-06-11
CN1066529A (zh) 1992-11-25
EP0512622A1 (en) 1992-11-11
HU208387B (en) 1993-09-28
HUT61132A (en) 1992-11-30
DE69206037T2 (de) 1996-05-30
DE69206037D1 (de) 1995-12-21

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