JP2006004668A - Dielectric barrier discharging low-pressure discharge lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress winding irregularities in a circumferential direction at an end of a glass lamp container 10 in manufacturing of a lamp, by using not a metal tape, but an electric conductive shrinkable tube to a material for forming external electrodes 20, 21, to enable manufacture of a lamp with a stable quality performance, and to reduce weight of a lamp. <P>SOLUTION: In a dielectric barrier discharging low-pressure discharge lamp 11, external electrodes 20, 21 are arranged on the outers of both ends of the tube of the tubular glass lamp container 10, a discharge medium 60 is encapsulated into the tubular glass lamp container, and a phosphor layer 70 is formed on the inner surface of the glass lamp container. At least one of the electrodes in the circumferential direction at both the ends of the tube of the tubular glass lamp container 10 is formed by covering electric conductive shrinkable tubes 30, 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dielectric barrier discharge type low-pressure discharge lamp.

  As a so-called dielectric barrier discharge type low pressure discharge lamp (EEFL) having an electrode on the outer surface of a tubular glass lamp vessel, for example, one described in Japanese Utility Model Laid-Open No. 61-126559 is known. The configuration of this conventional low-pressure discharge lamp is as shown in FIGS.

  3 and 4, 15 is a low pressure discharge lamp, and 10 is a tubular glass lamp vessel sealed at both ends. The tubular glass lamp vessel 10 is filled with an ionizable filler 60 such as a rare gas or a mixed gas of mercury and a rare gas. A phosphor layer 70 or the like is formed on the inner wall surface of the tubular glass lamp vessel 10. Reference numeral 80 denotes a protective film formed on the inner periphery of the glass lamp vessel 10 as necessary.

  External electrodes 25 and 26 are disposed on the outer surfaces of both ends of the tubular glass lamp vessel 10. The external electrodes 25 and 26 are formed by winding metal tapes 35 and 36 made of, for example, aluminum foil and a conductive adhesive around the outer periphery of both ends of the tubular glass lamp vessel 10 as current conductor layers.

  The low-pressure discharge lamp 15 having such a configuration is characterized in that since the electrode is not disposed in the glass lamp vessel 10, the electrode is not consumed and the life is long.

However, in the case of a conventional dielectric barrier discharge type low-pressure discharge lamp, since the material of the external electrodes 225 and 26 is made of metal, the winding unevenness in the circumferential direction of the glass lamp vessel 10 is likely to occur, and the distance from the glass surface It is difficult to keep the lamp uniform, and the voltage between the lamps tends to vary from product to product due to the non-uniform distance from the glass surface. In addition, the use of a metal material for the external electrodes 25 and 26 increases the weight.
Japanese Utility Model Publication No. 61-126559

  The present invention has been made in view of such a conventional technical problem. By using a conductive shrinkable tube instead of a metal tape as a material constituting the external electrode, a circle is formed at the end of the glass lamp vessel in lamp manufacturing. It is an object of the present invention to provide a dielectric barrier discharge type low-pressure discharge lamp that can suppress winding unevenness in the circumferential direction, can maintain a stable voltage between lamps, and can reduce the weight of the lamp.

  According to the first aspect of the present invention, external electrodes are arranged on the outer periphery of both ends of the tube of the tubular glass lamp container, a discharge medium is enclosed in the tubular glass lamp container, and a phosphor is disposed on the inner peripheral surface of the glass lamp container. In the dielectric barrier discharge type low-pressure discharge lamp in which the layers are formed, at least one of the outer electrodes on the outer periphery of both ends of the tube is formed by depositing a conductive shrinkable tube.

  According to the present invention, there is little variation in the voltage between lamps, it is possible to manufacture a product with uniform quality, and weight can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 show the configuration of a dielectric barrier discharge type low-pressure discharge lamp according to an embodiment of the present invention. 1 and 2, reference numeral 11 denotes a dielectric barrier discharge type low-pressure discharge lamp, and 10 denotes a tubular glass lamp vessel sealed at both ends. Inside the tubular glass lamp vessel 10, a rare gas or a mixed gas of rare gases and an ionizable filler 60 such as mercury are enclosed. A phosphor layer 70 or the like is formed on the inner wall surface of the tubular glass lamp vessel 10. Reference numeral 80 denotes a protective film formed on the inner periphery of the glass lamp vessel 10 as necessary. This protective film 80 is also formed on the inner periphery of both ends of the tubular glass lamp vessel 10 where the phosphor layer 70 is not formed. By providing such a protective film 80, mercury consumption due to mercury adsorption on the phosphor layer 70 can be eliminated, and the life of the lamp can be extended.

  In the present embodiment, the external electrodes 20 and 21 disposed on the outer surfaces of both end portions of the tubular glass lamp vessel 10 are composed of conductive shrinkable tubes 30 and 31. Thus, by comprising the external electrodes 20 and 21 with the conductive shrinkable tubes 30 and 31, it has rubber flexibility, good adhesion to the glass surface, and can be uniformly adhered, and the voltage between the lamps can be reduced. Variations can be reduced and lighter than metal tape.

  Examples of the present invention will be described together with comparative examples.

[Embodiments of the present invention]
<Tubular glass lamp vessel>
Material: Borosilicate glass.

  Dimensions: Outer diameter 2.6 mm, Inner diameter 2.0 mm, Total length 370 mm.

<External electrode>
Material: Conductive shrink tube.

  Dimensions: Thickness 0.05 mm, length of arrangement part: 17 mm.

<Phosphor layer>
Material: Three-wavelength phosphor. Thickness: 20 μm.

<Encapsulation>
Filled gas: Neon and argon mixed gas (composition ratio: neon / argon = 90 mol% / 10 mol%). Sealing pressure: 60 Torr.

  Mercury: 3 mg enclosed.

[Comparative example]
A tubular glass lamp container, an external electrode, a phosphor layer, and an enclosure similar to those of the examples of the present invention were used, and the following were used as the external electrodes.

<External electrode>
Material: Metal tape with a conductive adhesive applied to the back of an aluminum foil.

  Dimensions: Thickness 0.05 mm, length of arrangement part: 17 mm.

For each of the example product and the comparative product having the above-mentioned configuration, 10 were prepared, and the lamp current was set to 4 mA, and the lamp voltage was measured. The lamp voltage measurement results are shown in Table 1.

  From this result, it was proved that the lamp voltage of the product according to the embodiment of the present invention has little variation among the lamps and the quality is uniform.

1 is an axial sectional view of a dielectric barrier discharge low-pressure discharge lamp according to an embodiment of the present invention. II-II sectional view taken on the line in FIG. The axial direction sectional drawing of the dielectric material barrier discharge type low pressure discharge lamp of a prior art example. IV-IV sectional view taken on the line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Tubular glass lamp vessel 11 Low pressure discharge lamp 20, 21 External electrode 30, 31 Conductive contraction tube

Claims (1)

A dielectric barrier in which external electrodes are arranged on the outer periphery of both ends of a tube of a tubular glass lamp vessel, a discharge medium is sealed in the tubular glass lamp vessel, and a phosphor layer is formed on the inner circumferential surface of the glass lamp vessel In discharge-type low-pressure discharge lamps,
A dielectric barrier discharge type low pressure discharge lamp characterized in that at least one of the outer electrodes on the outer periphery of both ends of the tube is formed by adhering a conductive shrinkable tube.

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