CN2829077Y

CN2829077Y - Cold cathode gas discharge device

Info

Publication number: CN2829077Y
Application number: CN 200520012769
Authority: CN
Inventors: 葛世潮
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-27
Filing date: 2005-06-27
Publication date: 2006-10-18
Anticipated expiration: 2015-06-27

Abstract

The utility model relates to a cold cathode gas discharge device, which comprises a vacuum-sealed gas discharge cavity, wherein both ends of the cavity body is respectively provided with a discharge electrode; a discharge medium is filled in the cavity body. The electrode comprises at least one section of electrode with getter and/or amalgam and one section of metal electrode for lengthening or increasing; both sections of electrodes are mutually connected and are educed out of the gas discharge cavity by metal wires. The electrode has low working temperature, and is capable of providing large working current for making the large power cold cathode gas discharge device. Simultaneously, the utility model has the getter and/or the amalgam, and has the advantages of low cost, high luminous efficiency and long service life. The cold cathode gas discharge device can be used for making cold cathode fluorescence lamps, liquid crystal display back illumination, ultraviolet discharge lamps, neon lamps, etc.

Description

Cold-cathode gas discharge device

Technical field

The utility model relates to the electrode that a kind of cold-cathode gas discharge device, particularly a kind of cold-cathode gas discharge device are used, be used to make cold-cathode gas discharge devices, particularly large power cold cathode gas discharge device such as cold-cathode fluorescence lamp, liquid crystal display back illumination, ultraviolet discharge lamp, neon light.

Background technology

In the prior art, the electrode that cold-cathode gas discharge device is used has multiple, with its structure, has metal electrode, Metal Substrate to add getter, Metal Substrate and adds getter and amalgam and Metal Substrate to add electronics emission powder etc. multiple; Its shape has odd-shaped cross sections such as garden tubular, cup-shaped sheet, T shape etc. multiple.

The initiating electron of cold-cathode gas discharge is mainly derived from the field emission of cold cathode, its cathode drop height, generally be about 140 volts, this cathode drop after discharging current surpasses certain numerical value, will rise rapidly with the raising of discharging current, be that the power that negative electrode consumes will increase rapidly, temperature more serious, negative electrode place glass tube rises, foreign gas increases, the glass at nearly electrode place can crystallization cause gas leakage and make electric discharge device inefficacy, discharge medium consumption quickening, the electric discharge device lost of life thereby cause that cathode temperature rises rapidly, cathodic sputtering becomes.

For this reason, prior art take on negative electrode to cover one deck electronics emission powder, in the hope of reducing cathode drop.But experiment shows that its effect is little, and its electronics emission powder exhausts easily and lost efficacy.

Secondly, but prior art takes to add large electrode, improving the discharging current of operate as normal, but this increases cost, and the caliber at electrode place will strengthen, and particularly under the situation that getter and amalgam are arranged on the electrode, its cost will heighten.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of cold-cathode gas discharge device that getter and/or amalgam, electrode working temperature are low, big operating current can be provided that has is provided.It includes a vacuum-packed gas discharge chamber, and two ends in the cavity respectively have a sparking electrode, are filled with discharge medium in the cavity; Described sparking electrode includes at least one section electrode that has getter and/or an amalgam and one section and is used to the metal electrode that extends or strengthen, and described electrode has Metal Substrate, and the one side of Metal Substrate has getter, and another side has amalgam; Electrode is welded on the metal electrode, and metal electrode is outside metal wire is drawn vacuum-packed gas discharge chamber.

Described at least one section electrode that has getter and/or an amalgam can be the electrode of odd-shaped cross sections such as sheet, cylindrical shape, T shape, and required area and length can decide by required mercury amount.

The metal electrode of described lengthening or increasing can be the electrode of odd-shaped cross sections such as cylindrical shape, cup-shaped, sheet, T shape, and its area and length can decide by the power of electric discharge device and the design work temperature of electrode.

The metal electrode of described lengthening or increasing increases or the area and the length of the electrode that extended, and can reduce the working temperature of electrode, and bigger operating current can be provided, and has getter and/or amalgam and cost low again simultaneously.

Described at least one section electrode that has getter and/or amalgam also can only have getter, at this moment then need add mercury or other Discharge illuminating medium separately.

Described at least one section electrode that has a getter can be activated at, for example about 850 ℃, or low-temp activation, for example about 300-350 ℃, and the activation of latter's getter can be finished by the baking temperature in the gas discharge device exhaust process.

The vacuum-packed gas discharge chamber cavity of described gas discharge device can be glass tube, quartz ampoule, quartz glass tube, is filled with the gas discharge material in the chamber, on the cavity inner wall luminous material layer can be arranged.

Also can isolate between the metal electrode of described at least one section electrode that has getter and/or an amalgam and lengthening or increasing and the gas discharge chamber cavity by mica.

Gas discharge device electrode of the present utility model compared with prior art has advantages such as discharging current is big, the electrode working temperature is low, power is big, the life-span is long.

Description of drawings:

Fig. 1 is the structural representation of an embodiment of the present utility model.

Fig. 2 is another example structure schematic diagram of the present utility model.

Embodiment

Sign in the accompanying drawing has:

1-electrode 2-Metal Substrate 3-getter

4-amalgam 5-electrode 6-nickel wire

7-Dumet wire 8-gas discharge chamber 9-glass tube

The luminous bisque of 10-glassy layer 11-mica 12-

Below in conjunction with accompanying drawing the utility model is described in detail.Shown in Figure 1, the utility model mainly includes a vacuum-packed gas discharge chamber 8, and two ends in the cavity respectively have a sparking electrode, are filled with discharge medium in the cavity; Described sparking electrode includes at least one section pellet electrode 1 that has getter and/or an amalgam and one section and is used to the metal electrode 5 that extends or strengthen, and Metal Substrate 2 is arranged on the electrode 1, and the one side of Metal Substrate is a getter 3, and another side is an amalgam 4; Electrode 1 is welded on the metal electrode 5, and metal electrode 5 is outside

metal wire

6 and 7 is drawn gas discharge chamber 8; The cavity of the gas discharge chamber shown in Fig. 1 is a glass tube 9, and used lead-out wire is two joint silks of nickel wire 6 and Dumet wire 7, glassy layer 10 can be arranged, to improve the reliability of vacuum seal between Dumet wire and the glass tube 9 on the Dumet wire 7.

Described at least one section electrode 1 that has getter and/or amalgam is sheet, also can be the electrode of odd-shaped cross sections such as cylindrical shape, T shape, and its area and length can decide by required mercury amount.

Described at least one section electrode 1 that has getter and/or amalgam also can only have getter, described getter can be activated at, for example about 850 ℃, or low-temp activation, about 300-350 ℃ getter for example, the activation of latter's getter can be finished by the baking temperature in the gas discharge device exhaust process, at this moment then need add mercury or other Discharge illuminating medium separately.

The metal electrode 5 of described lengthening or increasing can be cylinder electrode, also can be the electrode of odd-shaped cross sections such as cup-shaped, sheet, T shape, and its area and length can decide by the power of gas discharge device and the design work temperature of electrode; It can be made by metals such as nickel, nickel-clad iron or stainless steels.

Described vacuum seal gas discharge chamber cavity can be glass tube 9 or quartz ampoule or quartz glass tube and constitutes, be filled with the gas discharge material in the chamber, on the cavity inner wall luminous material layer can be arranged, shown among Fig. 2 12, can be made into cold-cathode fluorescence lamp, uviol lamp, neon light etc.

Two ends in the described gas discharge chamber (8) respectively have an electrode as shown in Figure 1, and the electrode of this two end can be identical or inequality, and for example the electrode of an end has only the metal electrode 5 of lengthening or increasing.Described two ends add that suitable operating voltage can described gas discharge device Discharge illuminating.

Shown in Figure 2, described one section metal electrode that is used to extend or strengthens 5 is sheet, and described at least one section has electrode 1 and the lengthening or the metal electrode 5 that strengthens of getter and/or amalgam and constitute between the glass tube 9 of gas discharge chamber and have mica 11 to isolate; Luminous bisque 12 is arranged, to make cold-cathode fluorescence lamp, uviol lamp, neon light etc. on the inwall of described glass tube 9.Other digital meaning identical with shown in Fig. 1 among Fig. 2.

Each embodiment that the claimed scope of the utility model is not limited to introduce herein, the know-how that relates to is that the general personnel of this specialty are familiar with, and therefore as long as understand content of the present utility model and characteristic, can do various forms of conversion and replacement.

Claims

1, a kind of cold-cathode gas discharge device, it includes a vacuum-packed gas discharge chamber, and two ends in the cavity respectively have a sparking electrode, are filled with discharge medium in the cavity; It is characterized in that described sparking electrode includes at least one section electrode (1) that has getter and/or an amalgam and one section and is used to the metal electrode (5) that extends or strengthen, described electrode (1) has Metal Substrate (2), the one side of Metal Substrate (2) has getter (3), and another side has amalgam (4); Electrode (1) is welded on the electrode (5), and electrode (5) is outside metal wire is drawn vacuum-packed gas discharge chamber (8).

2, cold-cathode gas discharge device according to claim 1 is characterized in that the electrode of described electrode (1) for odd-shaped cross sections such as sheet, cylindrical shape, T shapes.

3, cold-cathode gas discharge device according to claim 1 is characterized in that described electrode (5) can be the electrode of odd-shaped cross sections such as cylinder electrode, cup-shaped, sheet, T shape, and is made by nickel, nickel-clad iron or stainless steel metal.

4, cold-cathode gas discharge device according to claim 1 is characterized in that described gas discharge chamber (8) is made up of vacuum-packed glass tube (9) or quartz ampoule or quartz glass tube, and luminous material layer (12) can be arranged on its cavity inner wall.

5,, it is characterized in that having between the chamber wall of described electrode (1) and metal electrode (5) and gas discharge chamber (8) mica (11) to isolate according to claim 1 or 2 or 3 described cold-cathode gas discharge devices.

6, cold-cathode gas discharge device according to claim 5 is characterized in that two termination electrodes (1,5) in the described gas discharge chamber (8) are the electrode of same structure.