CN2870166Y - Electrode structure of gas discharge lamp - Google Patents

Abstract

An electrode structure of gas discharge lamp, the electrode is placed in chamber of gas discharge lamp, of which the electrode is provided with curved or spherical electron emitting surface on inner end of the chamber, electron through this electrode may be radiated into this chamber through this electron emitting surface, reacting gas stored in this chamber is excited, visual light is generated through reacting fluorescent layer, of which electrode radiates electron uniformly through curved or spherical electron emitting surface, so as to avoid too furious laser reaction which might cause electrode metal ion to deposit on reacting fluorescent layer of luminous tube.

Description

The electrode structure of gaseous discharge lamp

Technical field

The utility model relates to a kind of gaseous discharge lamp, and particularly a kind of gaseous discharge lamp is in order to the electrode structure of emitting electrons.

Background technology

Because portable electronic product and communication related industry flourish, LCD presents development significantly in recent years.And this series products in the requirement of application surface except compact, also have an important aspect, it is simpler and easy to be exactly that the manufacturer needs in constructional improvement, not only conveniently makes, but also needs to save cost.Generally speaking, (Backlight Unit, BLU) element of a back side light source of product, its typical application can be provided is exactly that light source as this class flat-panel screens of LCD provides part to general reference to module backlight.With regard to the light-emitting component kind of using, mainly contain electroluminescence (Electronluminescence at present; EL), hot-cathode electric (Hot Cathode Electrons), cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamps, CCFL), and light-emitting diode (light emitting diode, LED) four types gaseous discharge lamp, it has low consumption electric power, high briliancy, high efficiency, heat is few, can be applicable to the liquid crystal fluorescent discharge lamp that the anti-frequent point of tiny type goes out, electrical characteristic is stable, optical characteristics is good, numerous advantages such as the easy change of profile, be the main product of existing light source, after its principle of luminosity is power supply input fluorescent lamp, electric current makes the temperature of electronic emission material rise by electrode, and then electronics is discharged, electronics forms electron stream in fluorescent tube, and bump mercury atom and produce ultraviolet ray, ultraviolet irradiation produces visible light in being coated with the fluorescent substance of being located at fluorescent tube, owing to do not use filament, so therefore no filament blow or broke problem has very reliable useful life.

The electrode form of existing gaseous discharge lamp is square, and this kind electrode electron radiation is preceding transverse plane place.Or as No. the 416083rd, Taiwan utility model patent described " cold electron emission type electrode ", wherein the electrode side-looking is an arrowhead form, and its electrode electron radiation place also is the plane.The electrode of existing fluorescent lamp is and utilizes the plane electron radiation, then intensive this plane that is in of electronics, the practice according to prior art, fluorescent tube is through producing a circle black ring in lamp tube ends after using for a long time, the main cause that forms the black ring is the surface of electronics concentrations in the electrode emitting electrons, make near the laser reactive of electrode too acutely produce high temperature, make the metallic atom evaporation on the electrode and be deposited on becoming light tight on the fluorescent layer, and then make the fluorescent tube blackening.In addition, as the novel patent in Taiwan M249201 number described " dull and stereotyped row cold cathode fluorescent lamp ", it adopts hollow type electrode (hollow cathode), and electrode voltage is reduced; And the inner face that has also disclosed at the hollow type electrode in No. 3107743 specification of Japan Patent is coated with R ₂O ₃The electron discharge material of type makes electrode have the work function of actual utility to reduce, and more reduces electrode voltage.

This hollow type electrode discloses the open front that has also disclosed at this electron discharge electrode in No. 200501187 at the Taiwan utility model patent and becomes obtuse angle or shaped form, during the suppressible point lamp because electric field is concentrated the sputter phenomenon (sputtering) produced, so can prolong the melanism of electrode perimeter tube wall electrode material, thereby promote the life-span of cold-cathode tube.

Also in this patent, mention about the hollow type electrode shape, wherein make this hollow type electrode with lapping mode, it is not easy very much, when especially being applied to more tiny fluorescent tube, its processing is difficulty especially, produce the leading section at shaped form or obtuse angle at opening part, and so the practice is also wasted dealer's production cost (time, manpower), the real problem of desiring most ardently solution for dealer's greatly of therefore aforesaid variety of problems.

The utility model content

Main purpose of the present utility model is to address the aforementioned drawbacks, and for avoiding the existence of this defective, the utility model provides the electrode structure of the more uniform gaseous discharge lamp of a kind of gaseous discharge lamp brightness.

For this reason, according to the electrode structure of gaseous discharge lamp of the present utility model be applied to one in the airtight chamber and be filled with reacting gas and be provided with the gaseous discharge lamp of reaction fluorescent layer, be provided with the electrode (20) that is electrically connected on a power supply unit in the end of this gaseous discharge lamp, wherein, this electrode is positioned at the electronics surface of emission that the electronics surface of emission of gaseous discharge lamp inside is curved or spherical.

Can effectively reduce near the excessive laser reactive electrode according to the electrode structure of gaseous discharge lamp of the present utility model, avoid reacting the fluorescent layer melanism, allow electronics among chamber, carry out laser reactive equably, make that this gaseous discharge lamp brightness is more even with reacting gas.

Description of drawings

Fig. 1 is the generalized section that the utility model is applied to spot formula gaseous discharge lamp.

Fig. 2 is the stereoscopic schematic diagram that the utility model is applied to flat gaseous discharge lamp.

Fig. 3 is an embodiment schematic diagram of the present utility model.

Fig. 4 is another embodiment schematic diagram of the present utility model.

Embodiment

Relevant detailed description of the present utility model and technology contents, existing accompanying drawings is as follows:

See also shown in Figure 1, it is generalized section of the present utility model, as shown in the figure, the utility model is a kind of electrode structure of gaseous discharge lamp, this kind gaseous discharge lamp is an example with spot 10a in Fig. 1, and this spot 10a comprises a fluorescent tube, the inner hollow chamber 12 that forms of this fluorescent tube, be filled with the reacting gas that can produce ray through laser reactive in this chamber 12, and chamber 12 inner wall surface are coated with reaction fluorescent layer 11; Among the embodiment of Fig. 1, these chamber 12 two ends are provided with two corresponding electrodes 20,20 ', this two electrode 20,20 ' possesses respectively has a junction 22 to be located at inner end 21 within the chamber 12 to be electrically connected on a power supply unit 30 and, and wherein the inner end 21 of an electrode 20 forms the electronics surface of emissions.This spot 10a provides voltage through this power supply unit 30, makes electronics by this electronics surface of emission emission.This electronics surface of emission that is characterised in that of the present utility model is curved or spherical, by this, electronics is after passing through the curved or spherical electronics surface of emission, electronics can have broad radiation areas, as shown in FIG., these electrode 20 glomeration bodies, this electronics surface of emission is the surface of this orbicule, when power supply adds, during the discharge beginning, electronics is passed in this electrode 20 via connecting portion 22, and therefore the temperature of electronic emission material rises, and causes by the radiation of the electronics surface of emission to discharge a large amount of electronics, electronics pressurizes at two interpolars, flow to positive pole by negative pole, cause flowing of intraductal electric current, at pipe inner impact reacting gas, wherein this reacting gas includes inert gas and mercury vapour, or the mixed gas of inert gas and mercury vapour (it uses the non-feature of the present utility model of material, does not add at this and gives unnecessary details), electronics produces ultraviolet ray via knock-on reaction gas, this ultraviolet ray is via reaction fluorescent layer 11, and mat makes the sightless ultraviolet radiation of the generation of electronics and reacting gas convert the long visible light of wavelength to.Electronics passes through the curved electronics surface of emission in the utility model, and is radiated in the chamber 12 at this electronics surface of emission fifty-fifty, and the ejaculation path of each electronics is that disperse state discharges relatively, and non-grade is to leaving this electronics surface of emission.

See also shown in Figure 2, be that of the present utility model another uses the illustration intention, as shown in the figure, it is flat gaseous discharge lamp 10b that of the present utility model another makes use-case, its principle of luminosity is same as above-mentioned, this flat gaseous discharge lamp 10b has a top glass substrate 101b and a lower glass substrate 102b, and formed airtight chamber 12 is filled with reacting gas between top glass substrate 101b and lower glass substrate 102b, its middle chamber 12 is near the surface coated of the top glass substrate 101b fluorescent layer 11 that responds, and lower glass substrate 102b then is coated with reflectorized material near the surface of chamber 12, and two interior electrodes 20 that are respectively equipped with a plurality of inner ends 21, and with aforementioned two electrodes 20,20 ' is located at the corresponding end face of flat gaseous discharge lamp 10b any two respectively, so that the effect that excites the shinny power supply unit of this flat gaseous discharge lamp 10b 30 and a gaseous discharge lamp 10b electric power transfer to be provided.Aforesaid power supply unit 30 is backlight power supply unit (Backlight Inverter), its execution mode can be piezoelectric transformer (Piezoelectric Transformer) or Wound-rotor type transformer (Transformer), if use piezoelectric transformer, also can utilize the output power of its high pressure, excite large-sized gaseous discharge lamp, make it luminous.

Please consult Fig. 3 and Fig. 4 more in the lump, it is other embodiment schematic diagram of the present utility model, its shape is not to be used to limit scope of the present utility model, and only be preferred embodiment of the present utility model, as shown in the figure, inner end 21a, 21b dissimilar shape that Fig. 3 and its electronics surface of emission shown in Figure 4 are respectively electrode 20a, 20b form, and wherein the curved surface of different aspects is all in order to reach the purpose of radiating electron.

What must be emphasized is, of the present utility model focusing on: electronics is radiated to chamber 12 by the curved electronics surface of emission, relative electronics, broad radiation areas can be arranged and can concentrations in single plane, and the laser reactive zone is increased, effectively reduce near the temperature of electrode 20, order reaction fluorescent layer 11 melanism situations reduce the life-span that increases gaseous discharge lamp, and electronics also can on average be injected and carry out laser reactive in the chamber 12, makes electronics evenly carry out the brightness stability that laser reactive produced everywhere in chamber 12 and reaches average.

The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims (1)

1. the electrode structure of a gaseous discharge lamp, be applied to one in the airtight chamber (12) and be filled with reacting gas and be provided with the gaseous discharge lamp of reaction fluorescent layer (11), be provided with the electrode (20) that is electrically connected on a power supply unit (30) in the end of described gaseous discharge lamp, it is characterized in that:

The electronics surface of emission that described electrode (20) is positioned at described gaseous discharge lamp inside is the electronics surface of emission of curved or spherical.

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