KR100491588B1 - Outside electrode discharge lamp - Google Patents

Abstract

An object of the present invention is to realize an external electrode discharge lamp which can increase the amount of emitted light and further increase the lifespan.

An external electrode discharge lamp 12 in which electrodes 70 and 80 are formed at outer peripheries of both axial ends of a tubular glass lamp vessel 20 in which a discharge medium is sealed, wherein the electrodes are plastic thin metal conductors with plasticity. Layers of the conductive adhesives 32 and 42 are provided on the inner circumferential surface of (31, 41), and the layer of the conductive adhesive is one or a plurality selected from silicone resins, fluorine resins, polyimide resins, and epoxy resins, and conductive among them. The particles are dispersed.

Description

External electrode discharge lamp {OUTSIDE ELECTRODE DISCHARGE LAMP}

The present invention relates to an external electrode discharge lamp in which electrodes are formed on outer periphery of both ends of the axial direction of a tubular glass lamp container in which a discharge medium is sealed.

As a backlight of a liquid crystal display, electrodes are provided in each outer periphery of both ends of a tubular glass lamp container, as described in Unexamined-Japanese-Patent No. 61-126559, and the dielectric barrier discharge type low voltage discharge lamp (in this specification, an "external electrode discharge lamp) ”) Can be used.

This conventional external electrode discharge lamp 10 is a structure shown in FIG. 8, and is ionizable filler such as a rare gas or a mixed gas of mercury and rare gas inside the tubular glass lamp vessel 20 sealed at both ends. The 50 is encapsulated, and the phosphor layer 60 is formed on the inner circumferential surface of the glass lamp vessel 20, and the conductors 30 and 40 are formed as electrodes 70 and 80 on the outer circumference of both ends of the glass lamp vessel 20, respectively. Is wound into a coil shape.

Patent document 1

Room 61-126559

In general, the external electrode discharge lamp can be viewed as a capacitor like the equivalent circuit shown in FIG. Therefore, in the case of a capacitor, the capacity C is expressed as Equation 1.

(Wed 1)

Is the dielectric constant of the glass container, S is the effective area of the external electrode, and d is the thickness of the glass container.

Thereby, when the specification of the glass lamp container 20 is constant, the capacitance C will be generally proportional to the area S of the external electrode.

By the way, in the conventional external electrode discharge lamp mentioned above, since the area of the electrodes 70 and 80 is taken only by the line contact area of a coil, this electrode area S cannot be made large and the light emission amount cannot be made that much, either. There was a problem.

In order to improve the light emission amount of the external electrode discharge lamp, it is necessary to increase the electrode area, but for this reason, a dielectric barrier discharge type low voltage discharge lamp employing the electrodes 70 and 80 as shown in Fig. 10 is considered. Although the structure of the external electrode discharge lamp 11 shown in this FIG. 10 is the same as that of FIG. 8 in the inside of the glass lamp container 20, the glass lamp container 20 uses aluminum tape as electrodes 70 and 80. As shown in FIG. It is wound on the outer periphery of both ends. Therefore, the electrodes 70 and 80 have a structure in which the thin metal conductors 31 and 41 are bonded by the acrylic pressure-sensitive adhesives 33 and 43.

By setting it as this structure, the area S of the electrodes 70 and 80 can be made large as mentioned above, and the light emission amount as a discharge lamp can be improved.

However, also in the case of the external electrode discharge lamp of the structure shown in this FIG. 10, there exists a subject which should be improved as follows. It is carbonized under high temperature conditions accompanied by light emission of the acrylic pressure-sensitive adhesives 33 and 43 for adhering the metal conductors 31 and 41 used as the electrodes 70 and 80 to the glass lamp vessel 20. A deviation occurs in the sheet resistance, a current is concentrated in a portion where the resistance is locally lowered, a hole is generated in a portion in which the current of the glass lamp vessel 20 is concentrated, and the adhesive strength of the adhesive is weakened, so that the metal foil is removed from the glass surface. It is a technical problem that it becomes easy to peel off.

In order to further improve this external electrode discharge lamp shown in FIG. 10, the countermeasure which adhere | attaches a metal foil as an electrode to the outer periphery of a glass lamp container by a conductive adhesive can also be considered. By the way, in the case where the conductive adhesive such as iron particles dispersed in the acrylic adhesive is used as the conductive adhesive for bonding the metal foil to the glass surface, as in the case of the external electrode discharge lamp shown in FIG. When the adhesive is high, the adhesive is carbonized, the sheet resistance between the metal foil and the glass surface is varied, and the resistance is locally lowered, thereby concentrating the current to become a high temperature, causing a hole in the glass container, or the adhesive strength of the adhesive. The technical problem remains that the metal foil becomes weak and the metal foil easily peels off from the glass surface.

This invention is made | formed in view of such a technical subject, Comprising: It aims at providing the external electrode discharge lamp with big light emission amount and long life.

The invention of claim 1 is an external electrode discharge lamp in which electrodes are formed on outer peripheries at both ends of an axial direction of a tubular glass lamp container in which a discharge medium is enclosed, and the electrode is provided with an adhesive layer on an inner circumferential surface of a conductor layer having plasticity. The pressure-sensitive adhesive layer is one or more selected from silicone resins, fluorine resins, polyimide resins, and epoxy resins, and conductive particles are dispersed therein.

The invention of claim 2 is an external electrode discharge lamp in which electrodes are formed at outer peripheries of both axial ends of a tubular glass lamp vessel encapsulating a discharge medium therein, wherein the electrodes are adhered to the outer periphery of the glass lamp vessel by adhesion. It consists of a conductor layer which has a plasticity, and a contact metal conductor adhering to the outer periphery of the said conductor layer.

The invention of claim 3 is the external electrode discharge lamp of claim 2, wherein the pressure-sensitive adhesive layer is one or more selected from silicone resins, fluorine resins, polyimide resins, and epoxy resins, and conductive particles are dispersed therein. do.

The invention of claim 4 is the external electrode discharge lamp of claim 1 or 3, wherein the conductive particles in the pressure-sensitive adhesive is characterized in that one or a plurality selected from iron, nickel, silver, carbon.

The invention of claim 5 is the external electrode discharge lamp of claim 1 or 2, wherein the conductor layer of the electrode is at least one of tin foil, aluminum foil or copper foil.

The invention of claim 6 is an external electrode discharge lamp in which electrodes are formed on outer peripheries of both axial ends of a tubular glass lamp vessel encapsulating a discharge medium therein, the electrode being a metal mesh cloth, and the metal mesh cloth Is bonded to the outer circumferential surface of the glass lamp container by an adhesive.

According to a seventh aspect of the present invention, in the external electrode discharge lamp of the sixth aspect, the pressure-sensitive adhesive is a conductive pressure-sensitive adhesive in which conductive particles are dispersed and mixed therein.

The invention of claim 8 is characterized in that in the external electrode discharge lamp of claim 6 or 7, wherein the pressure-sensitive adhesive is selected from at least one of epoxy, silicon, fluorine and polyimide.

The invention of claim 9 is characterized in that in the external electrode discharge lamp of claims 6 to 8, the metal mesh fabric is selected from at least one of nickel, iron, copper, aluminum and tin.

The invention of claim 10 is an external electrode discharge lamp in which electrodes are formed at outer peripheries at both ends of an axial direction of a tubular glass lamp container in which a discharge medium is enclosed, wherein the electrode is embossed metal foil, and the embossed metal foil It is bonded by the silver adhesive to the outer peripheral surface of the said glass lamp container, Moreover, the embossing part of the said embossed metal foil is bonded to the outer peripheral surface of the said glass lamp container through the adhesive layer thinner than another part, It is characterized by the above-mentioned. .

The invention of claim 11 is the external electrode discharge lamp of claim 10, wherein the pressure-sensitive adhesive is a conductive pressure-sensitive adhesive in which conductive particles are dispersed therein.

The invention of claim 12 is characterized in that in the external electrode discharge lamp of claim 10 or 11, the pressure-sensitive adhesive is selected from at least one of epoxy, silicon, fluorine and polyimide.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail based on drawing. 1 shows a cross-sectional structure of an external electrode discharge lamp 12 of the first embodiment of the present invention. The external electrode discharge lamp 12 of this embodiment encloses a filler 50 capable of ionizing, such as a rare gas or a mixed gas of mercury and rare gas, inside the tubular glass lamp vessel 20 sealed at both ends. The phosphor layer 60 is formed on the inner circumferential surface of the glass lamp vessel 20 as needed, and the thin metal conductors 31 and 41 are formed as electrodes 70 and 80 on the outer periphery of both ends of the glass lamp vessel 20. ) Is bonded by the conductive adhesives 32 and 42 having the following composition.

As the metal conductors 31 and 41 constituting the electrodes 70 and 80, for example, plastic foil, aluminum foil, or copper foil is used. As the conductive adhesives 32 and 42, for example, those in which conductive particles such as iron particles, nickel particles, silver particles or carbon particles are dispersed in a silicone resin, fluorine resin or polyimide resin adhesive having a high heat resistance temperature use. Moreover, an epoxy resin type can be used for an adhesive.

As the conductive particles to be incorporated into the pressure-sensitive adhesive, when the iron particles or nickel particles are selected, high reliability conductivity can be obtained at low cost. When silver particles are selected, high reliability conductivity can be obtained with low resistance value. The conductivity can be obtained at low cost.

In addition, in manufacture of the discharge lamp 12, it is manufactured by winding the metal tape apply | coated to the back surface by the electrically conductive adhesive of said composition to both outer peripheral parts of the glass lamp container 20. As shown in FIG.

As described above, according to the external electrode discharge lamp of the present embodiment, the formation of the electrode becomes easy, and even when the lamp current is high, even when the ambient temperature is high, It is possible to suppress the occurrence of variation in the resistance value, to prevent the occurrence of perforation of the electrode portion of the glass container, and to prevent the metal foil of the electrode from being peeled from the glass container. It can emit light with a quantity of light.

Next, the external electrode discharge lamp of the second embodiment of the present invention will be described with reference to FIGS. 2 and 3. 2nd Embodiment is the external electrode discharge lamp 13 which uses the contact metal conductors 90 and 100 as a fixture tool electrode. In the external electrode discharge lamp 13 of this embodiment, since the contact metal conductors 90 and 100 are the electrodes 70 and 80, adhesiveness with the glass lamp container 20 is required.

By the way, even if the abutting metal conductors 90 and 100 are directly attached to the outer periphery of the end part of the glass lamp container 20, since they are rigid, they are inferior in adhesion with the outer peripheral surface of the glass lamp container 20, and therefore, a few It is difficult to realize the indicated electrode area S according to the design value.

By the way, in the external electrode discharge lamp 13 of this embodiment, in order to improve the adhesiveness between the inner periphery of the contact metal conductors 90 and 100 and the outer peripheral surface of the glass lamp container 20, A plastic conductive material such as metal tapes 35 and 45 coated with adhesives 34 and 44 on the back surface is wound around the outer circumference of both ends, and the contact metal conductors 90 and 100 are wound around the outer circumference of the metal tapes 35 and 45. Insert.

Thereby, the contact metal conductors 90 and 100 and the metal tape 35 and 45 which have plasticity are in close contact, and the metal tape 35 and 45 is in close contact with the outer peripheral surface of the glass lamp container 20, and as a result, Thus, the electrical adhesion between the contact metal conductors 90 and 100 and the outer circumferential surface of the glass lamp vessel 20 becomes good, and the substantial electrode area S causes the contact metal conductor single body to be attached to the glass lamp vessel 20. It is greatly improved than the electrode area in the case of insertion.

Moreover, silver paste can also be employ | adopted as a plastic conductive material. Moreover, further improved lamp performance can be attained by using the same pressure-sensitive adhesive as in the first embodiment and using a conductive pressure-sensitive adhesive in which metal particles are dispersed.

Next, the external electrode discharge lamp 14 of 3rd Embodiment of this invention is demonstrated using FIG. The present embodiment is characterized by constituting the electrodes 70 and 80 by adhering the metal mesh cloths 36 and 46 to the outer peripheral portions of both ends of the tubular glass lamp vessel 20 with the adhesives 37 and 47. In other configurations, like reference numerals denote like elements as in the first embodiment shown in FIG.

In the case of this embodiment, when the metal mesh cloths 36 and 46 are pressed against the surface of the tubular glass lamp container 20, the fibers of the metal mesh cloths 36 and 46 intervene a very thin adhesive layer on the glass surface. And contact with each other, thereby suppressing the occurrence of variations in resistance distribution between the metal mesh cloths 36 and 46 and the surface of the glass lamp vessel 20, and locally increasing the current density to provide a hole in the glass lamp tube. It can prevent it from being pierced. In addition, since there are many gaps in the thickness direction in the metal mesh fabrics 36 and 46, by pressing the metal mesh fabrics 36 and 46 strongly on the surface of the tubular glass lamp container 20, the adhesive 37, Bubbles between the layer of 47 and the surface of the tubular glass lamp vessel 20 can be eliminated.

In the present embodiment, as the material of the metal mesh fabrics 36 and 46, at least one of nickel, iron, copper, aluminum, and tin can be selected, whereby a highly reliable external electrode can be formed at low cost.

In addition, the resistance value distribution between the metal mesh cloths 36 and 46 and the surface of the glass lamp container 20 by using epoxy, silicone, fluorine or polyimide having high heat resistance as the adhesives 37 and 47. The occurrence of the deviation can be eliminated further.

Next, the external electrode discharge lamp 15 of 4th Embodiment of this invention is demonstrated using FIG. The present embodiment is characterized in that the metal mesh cloths 36 and 46 are bonded to the outer periphery of both ends of the tubular glass lamp vessel 20 by using the conductive adhesives 38 and 48 in which conductive particles are dispersed in the adhesive layer. do. The other structure is the same as that of 1st Embodiment shown in FIG. 1, and the same code | symbol has shown the same element.

Also in this embodiment, as a material of the metal mesh fabrics 36 and 46, it can select from at least one among nickel, iron, copper, aluminum, and tin, and can form a reliable external electrode at low cost by this.

In addition, as the conductive adhesives 38 and 48, one having a heat-resistant epoxy-based, silicone-based, fluorine-based, or polyimide-based adhesive, in which one or a plurality of conductive particles selected from iron, nickel, silver, and carbon are dispersed and mixed, can be used. As a result, the occurrence of variation in the resistance distribution between the metal mesh cloths 36 and 46 and the surface of the glass lamp container 20 can be further eliminated.

Next, the external electrode discharge lamp 16 of 5th Embodiment of this invention is demonstrated using FIG. The present embodiment constitutes the electrodes 70 and 80 by adhering the embossed metal foils 39 and 49 to the outer peripheral portions of both ends of the tubular glass lamp vessel 20 with the adhesives 37 and 47. do. Other configurations are the same as those in the first embodiment shown in FIG. 1, and like numerals denote like elements.

The embossing metal foils 39 and 49 are in contact with the surface of the tubular glass lamp container 20 via a very thin pressure-sensitive adhesive layer at a portion formed in an iron shape on the inner side, and formed in an iron shape on the outer side. The layer of adhesives 37 and 47 is formed in the back surface side of the part, and the emboss metal foils 39 and 49 are being fixed to the surface of the glass lamp container 20.

Epoxy type, silicone type, fluorine type, and polyimide type with high heat resistance can be used as the adhesives 37 and 47.

In the case of this embodiment, since the adhesive layer between the emboss metal foils 39 and 49 and the surface of the glass lamp container 20 was made very thin, between the metal foil and glass by deterioration of the adhesive during lamp lighting, The occurrence of the variation in the resistance distribution can be suppressed, so that the current density is increased locally and the hole can be prevented from being punched in the glass.

Next, the external electrode discharge lamp 17 of 6th Embodiment of this invention is demonstrated using FIG. In this embodiment, the embossed metal foils 39 and 49 are adhered to the outer peripheral portions of both ends of the tubular glass lamp container 20 by the conductive adhesives 38 and 48 having conductive particles dispersed therein. It characterized in that the configuration. The other structure is the same as that of 1st Embodiment shown in FIG. 1, and the same code | symbol has shown the same element.

Also in the external electrode discharge lamp 17 of the present embodiment, similarly to the case of the external electrode discharge lamp 16 of the fifth embodiment, a portion formed in the iron shape inside the embossed metal foils 39 and 49 is formed. The surface of the glass lamp container 20 is contacted via a very thin adhesive layer, and the layers of the conductive adhesives 38 and 48 are formed on the back side of the portion formed in the shape of iron on the outside thereof, and the embossed metal foil 39 49) is fixed to the glass surface.

As the conductive adhesives 38 and 48, those in which one or more conductive particles selected from iron, nickel, silver, and carbon are dispersed and mixed in an epoxy, silicone, fluorine, or polyimide-based adhesive having high heat resistance can be used.

In the external electrode discharge lamp 17 of the present embodiment, the pressure-sensitive adhesive layer is also made conductive so that deterioration of the pressure-sensitive adhesive in the portion between the portion made of the iron shape inside the emboss metal foils 39 and 49 and the glass surface. The resistance value change of an adhesive layer can further be reduced, and generation | occurrence | production of the dispersion | variation in the resistance value distribution between metal foil and glass can be eliminated more reliably.

Example

The external electrode discharge lamp of the example corresponding to this embodiment and the external electrode discharge lamp of the comparative example will be described.

(Example 1)

<Tubular glass lamp container>

Material: Borosilicate glass, Dimension: 2.6mm outer diameter, 2.Omm inner diameter, 350mm total length.

<Metal foil of electrode>

Aluminum foil, dimensions: thickness 0.1mm, electrode length 20mm.

<Conductive Adhesive of Electrode>

Material: Disperses iron particles in silicone resin adhesive.

<Phosphor layer>

Material: 3 wavelength phosphor, layer thickness: 20 µm.

<Filler>

(1) Encapsulation gas: mixed gas of neon and argon (composition ratio: neon / argon = 90 mol% / 10 mol%), sealing pressure: 60 Torr.

(2) Mercury: 3 mg of loading.

(Comparative Example 1)

It is common to Example 1 except the composition of the adhesive of an electrode.

The adhesive of the electrode used the acrylic adhesive. The conductive particles are not dispersed in the pressure-sensitive adhesive.

The lighting test was performed with the lamp current of 6 mA about the external electrode discharge lamp of the specification of Example 1 and the comparative example 1 mentioned above. As a result of this lighting test, the hole of the glass container was produced in Comparative Example 1 in about 70 to 1000 hours, whereas in Example 1, the hole of the glass container was not generated even in 5000 hours of continuous lighting.

(Example 2)

<Tubular glass lamp container>

Material: Borosilicate glass, Dimension: 2.6mm outer diameter, 2.Omm inner diameter, 350mm total length.

<Contact metal conductor>

Material: stainless steel mesh, dimension: thickness 0.2mm, electrode length: 20mm.

<Metal tape>

Aluminum foil coated with acrylic resin adhesive, Dimensions: thickness 0.1mm, electrode length 20mm.

<Phosphor layer>

Material: 3 wavelength phosphor, layer thickness: 20 µm.

<Filler>

(1) Encapsulation gas: mixed gas of neon and argon (composition ratio: neon / argon = 90 mol% / 10 mol%), sealing pressure: 60 Torr.

(2) Mercury: 3 mg of loading.

(Comparative Example 2)

A contact metal conductor is attached to both ends of the glass lamp container common to Example 2, without using a metal tape.

As a result of supplying a high-frequency voltage of 3500 V and 50 kHz between the electrodes with respect to the external electrode discharge lamps having the specifications of Example 2 and Comparative Example 2 described above, in Example 2, a current of about 6 mA flowed, whereas Example 2 In the case of 8 mA current could flow.

As a result, in the external electrode discharge lamp of Example 2, the adhesion between the surface of the glass lamp vessel and the contact metal conductor becomes better than when the contact metal conductor is directly attached to the glass lamp vessel, and the applied voltage is the same. In this case, the amount of emitted light can be increased, and power consumption can be reduced when the amount of emitted light is the same.

(Example 3)

<Tubular glass lamp container>

Material: borosilicate glass.

Dimensions: outer diameter 2.6mm, inner diameter 2.Omm, total length 379mm.

<External Electrode>

Nickel mesh fabric + conductive silicone adhesive layer.

External electrode length: 17 mm.

<Phosphor layer>

Material: 3 wavelength phosphor.

Thickness: 20 μm.

<Filler>

Enclosed gas: Mixed gas of neon and argon (composition ratio: neon / argon = 90 mol% / 10 mol%).

Sealing pressure: 8 kPa.

Mercury: 3 mg.

(Example 4)

<Tubular glass lamp container>

Material: borosilicate glass.

Dimensions: outer diameter 2.6mm, inner diameter 2.Omm, total length 379mm.

<External Electrode>

Embossed aluminum foil + conductive silicone adhesive layer.

External electrode length: 17 mm.

<Phosphor layer>

Material: 3 wavelength phosphor.

Thickness: 20 μm.

<Filler>

Enclosed gas: Mixed gas of neon and argon (composition ratio: neon / argon = 90 mol% / 10 mol%).

Sealing pressure: 8 kPa.

Mercury: 3 mg.

(Comparative Example 3)

<Tubular glass lamp container>

Material: borosilicate glass.

Dimensions: outer diameter 2.6mm, inner diameter 2.Omm, total length 379mm.

<External Electrode>

Aluminum foil + acrylic adhesive layer.

External electrode length: 17 mm.

<Phosphor layer>

Material: 3 wavelength phosphor.

Thickness: 20 μm.

<Filler>

Enclosed gas: Mixed gas of neon and argon (composition ratio: neon / argon = 90 mol% / 10 mol%).

Sealing pressure: 8 kPa.

Mercury: 3 mg.

As a result of lighting each discharge lamp of Example 3 and Example 4 and the discharge lamp of Comparative Example 3 with a lamp current of 5 mA for 5000 hours, in Comparative Example 3, a hole was formed in the glass in about 70 to 1000 hours. 3, Example 4 In each of the discharge lamps, the glass was not punctured even after lighting for 5000 hours.

In the case of the discharge lamps of Examples 3 and 4, this suppresses the change in the resistance value between the metal mesh cloth or the embossed metal foil of the external electrode generated during the lamp lighting and the tubular glass lamp vessel, It is considered that by preventing the occurrence of the deviation, it is possible to prevent the punching of the glass.

According to the present invention as described above, the formation of the electrode is facilitated, and the occurrence of variation in the resistance value of the pressure-sensitive adhesive layer due to the deterioration of the pressure-sensitive adhesive generated during operation of the lamp even when the lamp current is high and the ambient temperature is high is suppressed. It is possible to prevent the formation of holes in the electrode portion of the glass container, to prevent the metal foil of the electrode from peeling off the glass container, and to be stable for a long time and to emit light at a high light quantity. .

Furthermore, according to the present invention, the electrical contact between the contact metal conductor and the outer circumferential surface of the glass lamp container is good, and the substantial electrode area is significantly improved than the electrode area when the contact metal conductor single body is inserted into the glass lamp container. As a result, improved efficiency can be achieved.

Further, according to the present invention, it is possible to prevent the opening of the glass in the glass by suppressing the change of the resistance value between the metal mesh cloth and the tubular glass lamp vessel generated during the lamp lighting and preventing the variation in the resistance value distribution. Therefore, long life is attained.

Further, according to the present invention, it is possible to prevent the opening of the glass by suppressing the change of the resistance value between the embossed metal foil generated during the lamp lighting and the tubular glass lamp vessel, and preventing the variation of the resistance value distribution. It is possible to achieve long life.

1 is an axial cross-sectional view of an external electrode discharge lamp of a first embodiment of the present invention.

2 is an axial cross-sectional view of an external electrode discharge lamp of a second embodiment of the present invention.

3 is a cross-sectional view in a direction perpendicular to the axis of the external electrode discharge lamp of the second embodiment.

4 is an axial cross-sectional view of an external electrode discharge lamp of a third embodiment of the present invention.

5 is an axial cross-sectional view of an external electrode discharge lamp of a fourth embodiment of the present invention.

6 is an axial cross-sectional view of an external electrode discharge lamp of a fifth embodiment of the present invention.

7 is an axial cross-sectional view of an external electrode discharge lamp of a sixth embodiment of the present invention.

8 is an axial sectional view of an external electrode discharge lamp of a conventional example.

9 is an equivalent circuit of an external electrode discharge lamp.

10 is an axial cross-sectional view of an external electrode discharge lamp of a comparative example.

* Description of the symbols for the main parts of the drawings *

12 to 17: discharge lamp

20: glass lamp vessel

31: metal conductor

32: conductive adhesive

34: adhesive

35: metal tape

36: Metal Mesh Po

37: adhesive

38: conductive adhesive

39: embossed metal foil

41: metal conductor

42: conductive adhesive

44: adhesive

45: metal tape

46: metal mesh gun

47: adhesive

48: conductive adhesive

49: embossed metal foil

50: filler

60: phosphor layer

70, 80: electrode

90: contact metal conductor

100: contact metal conductor

Claims (12)

An external electrode discharge lamp in which electrodes are formed at outer peripheries of both ends of an axial direction of a tubular glass lamp container with a discharge medium sealed therein, The electrode is a pressure-sensitive adhesive layer is provided on the inner peripheral surface of the conductor layer having plasticity, The pressure-sensitive adhesive layer is one or more selected from silicone resins, fluororesins, polyimide resins, and epoxy resins, and conductive particles are dispersed therein. An external electrode discharge lamp in which electrodes are formed at outer peripheries of both ends of an axial direction of a tubular glass lamp container with a discharge medium sealed therein, The electrode is composed of a conductor layer having a plasticity bonded to the outer circumference of the glass lamp container by an adhesive and a contact metal conductor attached to the outer circumference of the conductor layer. lamp. The method of claim 2, The pressure-sensitive adhesive layer is one or more selected from silicone resins, fluororesins, polyimide resins, and epoxy resins, and conductive particles are dispersed therein. The method according to claim 1 or 3, The conductive particles in the pressure-sensitive adhesive is an external electrode discharge lamp, characterized in that one or more selected from iron, nickel, silver, carbon. The method according to any one of claims 1 to 3, The electrode layer of the electrode is an external electrode discharge lamp, characterized in that at least one of tin foil, aluminum foil or copper foil. An external electrode discharge lamp in which electrodes are formed at outer peripheries of both ends of an axial direction of a tubular glass lamp container with a discharge medium sealed therein, The electrode is a metal mesh cloth, And the metal mesh cloth is attached to an outer circumferential surface of the glass lamp container by an adhesive. The method of claim 6, The pressure-sensitive adhesive is an external electrode discharge lamp, characterized in that the conductive adhesive is dispersed and mixed therein. The method according to claim 6 or 7, The pressure-sensitive adhesive is an external electrode discharge lamp, characterized in that selected from at least one of epoxy, silicon, fluorine-based, polyimide-based. The method according to claim 6 or 7, The metal mesh fabric is an external electrode discharge lamp, characterized in that selected from at least one of nickel, iron, copper, aluminum, tin. An external electrode discharge lamp in which electrodes are formed at outer peripheries of both ends of an axial direction of a tubular glass lamp container with a discharge medium sealed therein, The electrode is embossed embossed metal foil, The embossed metal foil is adhered to the outer circumferential surface of the glass lamp container by an adhesive, and the embossed portion of the embossed metal foil is adhered to the outer surface of the glass lamp container via an adhesive layer thinner than other parts. External electrode discharge lamp characterized in that. The method of claim 10, The pressure-sensitive adhesive is an external electrode discharge lamp, characterized in that the conductive adhesive is dispersed and mixed therein. The method of claim 10 or 11, The pressure-sensitive adhesive is an external electrode discharge lamp, characterized in that selected from at least one of epoxy, silicon, fluorine-based, polyimide-based.