CN100377289C - Cold cathode discharge lamp and method for manufacturing the lamp - Google Patents
Cold cathode discharge lamp and method for manufacturing the lamp Download PDFInfo
- Publication number
- CN100377289C CN100377289C CNB028016246A CN02801624A CN100377289C CN 100377289 C CN100377289 C CN 100377289C CN B028016246 A CNB028016246 A CN B028016246A CN 02801624 A CN02801624 A CN 02801624A CN 100377289 C CN100377289 C CN 100377289C
- Authority
- CN
- China
- Prior art keywords
- tunicle
- electrode
- cold
- discharge lamp
- cathode discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/76—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only
- H01J61/78—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only with cold cathode; with cathode heated only by discharge, e.g. high-tension lamp for advertising
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
- H01J61/545—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode inside the vessel
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Discharge Lamp (AREA)
Abstract
A cold cathode discharge lamp capable of being rapidly started even in such a dark place that an ambient illuminance is 0.1 lux or below, comprising electrodes (5a) installed at both end parts of a glass tube (2) having a fluorescent body layer (3) formed on the inner surface thereof and filling substance sealed therein, wherein a first film (8) formed with a start assisting metal is formed on at least one of the electrodes (5a) and a second film (9) formed with the start assisting metal is formed on the inner surface of the glass tube (2) in proximity to the first film (8), whereby a weak discharge occurs between the second film (9) and the electrode (5a) or between the second film (9) and the first film (8).
Description
Technical field
The present invention relates to be used in the cold-cathode discharge lamp of the bias light of various liquid crystal indicators etc., relate in particular to the cold-cathode discharge lamp that also can obtain good starting characteristic under the low occasion of ambient illuminance.
Background technology
The cold-cathode discharge lamp that uses on the liquid crystal apparatus is because textural, extraneous light is difficult to arrive the surface of cold-cathode discharge lamp, the ambient illuminance that often is in the cold-cathode discharge lamp next door is lower than in the dark surrounds of 10Lux.Under such dark surrounds, start cold-cathode discharge lamp, because the initial stage electron number deficiency in the cold-cathode discharge lamp when beginning of discharging makes often will start with several～tens second ability with the sufficient device that can start of 500ms under the bright light environments at ordinary times.Generally,, wish under the dark surrounds below the 0.1Lux, also can start to the cold-cathode fluorescence lamp that uses in the liquid crystal apparatus, below, the topic that starts cold-cathode discharge lamp under the dark surrounds just is discussed.
For improving dark starting characteristic, in open communique 1992-121944 number of Japanese Patent Laid, once proposed a kind of like this cold-cathode discharge lamp: the shell inner face on the cold cathode next door is coated with some and can makes electronic emission material that electronics penetrates, that be made of any metal oxides of aluminium oxide, magnesium oxide, lead monoxide, lead oxide etc. in the dark with the excitation energy that is lower than work function.
In addition, in open communique 2001-15065 number of special permission, express the cesium compound coated electrode to improve the cold-cathode discharge lamp of starting characteristic.
But according to the cold-cathode discharge lamp of described formation, still to feel startup aspect the dark starting characteristic too slow improving.In addition, the cold-cathode discharge lamp of coating electronic emission material, than be not coated with the cold-cathode discharge lamp of electronic emission material at inner face, the starting characteristic under its dark state has been soon on average, but have also quite slow.
The present invention is in view of described problem, and its purpose is to provide a kind of cold-cathode discharge lamp, even illumination is in the dark surrounds of 0.1Lux around, also can more start with accelerating.
Summary of the invention
Cold-cathode discharge lamp of the present invention, with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose material and seal, the 1st tunicle that is made of with metal assistant starting is set, the 2nd tunicle that constitutes with metal by assistant starting in inner face setting near the glass tube of the 1st tunicle on electrode.
In addition, cold-cathode discharge lamp of the present invention, the tunicle that the tunicle that is made of with metal assistant starting is not set, only constitutes on electrode by assistant starting with metal in the inner face setting of glass tube.
The cold-cathode discharge lamp of the present invention the 1st aspect,
With electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose material and seal,
At at least one side's electrode, the 1st tunicle that is made of with metal assistant starting is set,
At inner face near the aforementioned glass tube of an aforementioned side's electrode, the 2nd tunicle that constitutes with metal by assistant starting near aforementioned the 1st tunicle setting.
The cold-cathode discharge lamp of the present invention the 2nd aspect,
Position not overlapping with the aforementioned phosphors layer that is formed at the glass tube inner face forms the 2nd tunicle.
The cold-cathode discharge lamp of the present invention the 3rd aspect is aspect the 1st or 2 in the described cold-cathode discharge lamp,
The shape of former electrodes is a tubular, and in periphery aforementioned the 1st tunicle is set.
The cold-cathode discharge lamp of the present invention the 4th aspect is aspect the 1st to 3 in each described cold-cathode discharge lamp,
The 2nd tunicle is alkali metal or alkaline-earth metal or their mixture.
The cold-cathode discharge lamp of the present invention the 5th aspect is aspect the 1st to 3 in each described cold-cathode discharge lamp,
Form the 1st tunicle with alkali metal compound or alkaline earth metal compound or their mixture,
Form the 2nd tunicle with alkali metal or alkaline-earth metal or their mixture.
The cold-cathode discharge lamp of the present invention the 6th aspect is aspect the 5th in the described cold-cathode discharge lamp,
Form the 1st tunicle with cesium compound, form the 2nd tunicle with caesium.
The manufacture method of the cold-cathode discharge lamp of the present invention the 7th aspect,
Make with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the cold-cathode discharge lamp that material seals the time,
Have the electrode of assistant starting in the configuration of at least one side's of aforementioned glass tube end, will enclose material simultaneously and seal with the 1st tunicle of metal,
The electric current that feed to surpass conventional lighting current on former electrodes wears out, by this aging, aforementioned the 1st tunicle is carried out spraying plating, forming the 2nd tunicle with position that the aforementioned phosphors layer that is formed at the glass tube inner face does not overlap,
Under the state that the 1st tunicle does not disappear from the surface of former electrodes, finish aforementioned agingly, form the 1st tunicle on the surface of electrode, form the 2nd tunicle at the inner face of aforementioned glass tube.
The cold-cathode discharge lamp of the present invention the 8th aspect,
Have with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the luminous tube that material seals,
Inner face near the aforementioned luminous tube of at least one side's electrode is provided with the tunicle that is made of with metal assistant starting.
The cold-cathode discharge lamp of the present invention the 9th aspect is aspect the 8th in the described cold-cathode discharge lamp,
Forming the assistant starting metal of aforementioned tunicle, is that the spraying plating quantities received is than the bigger metal of spraying plating quantities received under the rare gas condition of 100～600eV scope of the parent metal that forms former electrodes.
The cold-cathode discharge lamp of the present invention the 10th aspect is aspect the 8th or 9 in the described cold-cathode discharge lamp,
To the electrode of a side of the aforementioned tunicle that is made of with metal assistant starting be set at least, be connected the high-pressure side of lighting current.
The cold-cathode discharge lamp of the present invention the 11st aspect is aspect the 8th to 10 in each described cold-cathode discharge lamp,
Former electrodes is a tubular electrode.
The cold-cathode discharge lamp of the present invention the 12nd aspect is aspect the 8th to 11 in each described cold-cathode discharge lamp,
On the next door of at least one side's electrode and do not form the inner face of the luminous tube of luminescent coating, the tunicle that is made of with metal assistant starting is set.
The manufacture method of the cold-cathode discharge lamp of the present invention the 13rd aspect,
Make with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the cold-cathode discharge lamp that material seals the time,
Be provided with at least one side's of aforementioned glass tube end and have the electrode of assistant starting,, wear out having the high electric current that passes on the electrode of aforementioned assistant starting with a side of metal above conventional lighting current with metal,
By this aging, the aforementioned assistant starting metal of spraying plating, the tunicle that constitutes with metal by assistant starting in the inner face formation of aforementioned luminous tube.
The cold-cathode discharge lamp of the present invention the 14th aspect is in the manufacture method of described cold-cathode discharge lamp aspect the 7th or 13,
Aging electric current is about 2 to 3 times of conventional lighting current.
Description of drawings
The cutaway view and the X-X ' cutaway view thereof of the major part of the cold-cathode discharge lamp that Fig. 1 represents (example 1) of the present invention.
Fig. 2 represents the cutaway view with the cold-cathode discharge lamp of the relatively product of using with example comparison starting characteristic.
Fig. 3 represents with the enforcement product of example and the success rate distribution map of lighting a lamp of product relatively.
The cutaway view and the X-X ' cutaway view of the major part of the cold-cathode discharge lamp that Fig. 4 represents (example 2) of the present invention
Fig. 5 represents with the assistant starting of the example cutaway view with the major part of the cold-cathode discharge lamp of tunicle before the inner face of luminous tube forms of metal.
The cutaway view of the major part of the cold-cathode discharge lamp that Fig. 6 represents (example 3) of the present invention.
Fig. 7 represents the cutaway view of the major part of example in addition with the cold-cathode discharge lamp of example.
The cutaway view of the major part of the cold-cathode discharge lamp that Fig. 8 represents (example 4) of the present invention.
Fig. 9 represents respectively enforcement product and relatively the measurement result figure of the start delay time of product of (example 2)～(example 4).
Concrete example
Below, with Fig. 1～Fig. 9 each example of the present invention is described.Here, be example owing to construct identical cold-cathode discharge lamp, so the side of only drawing with both ends.
(example 1)
Fig. 1 (a) (b) represents example 1 of the present invention, and here, Fig. 1 (b) is along the cutaway view of X-X ' line in (a).
As shown in Figure 1, at the inner face formation luminescent coating 3 of glass tube 2, the open-ended tubular electrode 5a of its discharge side is set, at its both ends with suitable inclosure material sealing, formation luminous tube 1.End in the absence of discharge side of at least one side's electrode 5a is connecting metal inner lead-in wire 4, connects outside lead-in wire 7 at inner lead-in wire 4.
On electrode 5a, be provided with the 1st tunicle 8 that constitutes with metal by assistant starting,, be set at the position that does not overlap with the aforementioned phosphors layer 3 that is formed at glass tube 2 inner faces with the 2nd tunicle 9 that metal constitutes by assistant starting at the inner face of glass tube 2.
The 1st tunicle is with alkali metal compound or alkaline earth metal compound or the formation of their mixture, and the 2nd tunicle is with alkali metal or alkaline-earth metal or the formation of their mixture.
Below, lift the concrete example explanation.
Inner lead-in wire 4, the tungsten of the material that the coefficient of expansion of the formation material of employing and glass tube 2 is approaching forms, 7 nickel wires that use external diameter 0.6mm of outside lead-in wire.
At the both ends of glass tube 2, be provided with by molybdenum constitute, the former electrodes 5a of external diameter 1.7mm, internal diameter 1.3mm, total length 3mm～5mm.The 1st tunicle 8, (best, 1.5 ± 0.5mm) length forms to coat 0.5～3mm with the coating weight of 10～100 μ g (best, 40 ± 20 μ g) in the electrode length direction.
The 2nd tunicle 9 is formed at assigned position as following.
The 1st tunicle 8 is applied in electrode 5a, mercury is enclosed with 8kPa with the rare gas that mixes of neon with argon, then, on the luminous tube 1 that is not provided with on the 2nd tunicle 9,2～3 times the aging electric current that feeds conventional lighting current wears out, for example, when conventional lighting current is 8mA, can feed 18～25mA.When aging, coat the 1st tunicle 8 splashes of electrode 5a, the inner face that is covering at glass tube 2 forms.
Here, the aging time, end with the state that the 1st tunicle 8 does not disappear from the surface of electrode 5a, the 1st tunicle 8 remain in electrode 5a the surface, form time of the 2nd tunicle 9 of suitable thickness at the inner face of aforementioned glass tube 2, about 10 minutes.
In aging, discharge occurs between the periphery of opening to the 1 tunicle 8 coating of discharge side of tubular electrode 5a, and generation splash, but, under conventional lighting current, the discharge of electrode 5a can not arrive the periphery of coating the 1st tunicle, therefore, the 1st tunicle and the 2nd tunicle behind aging the end are stable, in use can not disappear.
Like this, the 1st tunicle 8 is set on the surface of electrode 5a in advance, assistant starting is being covered in the inner face of glass tube 2 with metallising, can be formed on electrode 5a the 2nd tunicle 9 next door, uniform film thickness by aging.
According to such formation, under dark surrounds, between the 2nd tunicle 9 and electrode 5a, or the 2nd slight discharge will take place between tunicle 9 and the 1st tunicle 8, in cold-cathode discharge lamp, can supply with the initial stage electronics that startup needs, can realize the little and good cold-cathode discharge lamp of dark starting characteristic of reduction of initial stage briliancy.
, measure and dark start delay time of product A relatively as the product of enforcement A with the cold-cathode discharge lamp of such formation.Sample number is 100.
The product of enforcement A, its 1st tunicle 8 adopt the caesium formation that the cesium compound of one of alkali metal compound forms, its 2nd tunicle 9 adopts one of alkali metal.The cold-cathode discharge lamp that like that, does not form the 2nd tunicle 9 with Fig. 2 is product A as a comparison.
Experimental condition, implement product A and relatively product A be placed in the dark surrounds that ambient illuminance is 0.1Lux after 48 hours, illumination is that 0.1Lux, environment temperature are, use the high-frequency lighting circuit (not shown) of output voltage as 1200Vrms under 0 ℃, calm condition around, and the dark start delay time is observed.The measurement result that obtains is shown in Fig. 3.
As can be seen from Figure 3, implement among the product A, 90% sample is realized lighting a lamp at 0.9ms, and relatively among the product A, the time that lighting a lamp needs is not wait between 1～250ms, wherein has 6% to surpass 500ms.In the occasion of enforcement product A, can obtain slight discharge, the initial stage electronics that the supply startup needs in low-pressure discharge lamp, the cold-cathode discharge lamp that dark starting characteristic is fabulous are taking place between the 1st tunicle 8 and the 2nd tunicle 9 or between the 2nd tunicle 9 and the 1st tunicle 8.
In addition, when the electrode 5a at both ends adopts other kind to construct, form the electrode of a side of the 1st tunicle 8 on its surface, preferably be connected with the high-pressure side of lamp circuit.
As the material of the 1st tunicle 8, can adopt the Li of alkali metal (the I family of periodic table), K, the compound of Rb etc. is to substitute cesium compound.Also can adopt the Be of alkaline earth metal compound (the II family of periodic table), Mg, Ca, Sr, the compound of Ba etc.
In addition, at aforementioned example 1, the shape of electrode 5a is tubular, even but the discharge side does not have the bar-shaped of opening, also can obtain the dark starting characteristic ratio much better cold-cathode discharge lamp of product in the past.But at this time, in order to keep the state long-term stability of the 1st, the 2 tunicle 8,9, with electrode 5a be tubular enforcement product A relatively, need do to reduce restriction to conventional lighting current.
In addition, if compare analysis with the enforcement product of speciallyying permit in open communique 2001-15065 number, can see, in open communique 2001-15065 number of special permission, the exterior light of the cesium compound of electrode is located in arrival, during luminescent layer (luminescent coating 3 that is equivalent to aforementioned example) by coating the glass tube inner face by big high attenuation, and in aforementioned example of the present invention, the 2nd tunicle 9 is formed at the position that does not overlap with the aforementioned phosphors layer 3 of the inner face of glass tube 2, inject the 2nd tunicle 9, exterior light is also unattenuated, slight discharge also takes place, by contrast, obviously, cold-cathode discharge lamp in the aforementioned communique can not obtain good dark starting characteristic, and this is the difference of the present invention and conventional art.
(example 2)
Fig. 4 and Fig. 5 represent example 2 of the present invention, and here, Fig. 4 (b) is along the cutaway view of X-X ' line in (a).
As Fig. 4 (a) (b) shown in, form luminescent coating 3 at the inner face of glass tube 2, at its both ends electrode 5b is set, with suitable inclosure material sealing, constitute luminous tube 1.End in the absence of discharge side of electrode 5b is connecting metal inner lead-in wire 4, connects outside lead-in wire 7 at inner lead-in wire 4.
At the inner face of luminous tube 1, form the tunicle 9a that constitutes with metal by assistant starting near electrode 5b.
Like this in the cold-cathode discharge lamp of Gou Chenging, between electrode 5b and the tunicle 9a that constitutes with metal by assistant starting slight discharge taking place, supplies with and start the initial stage electronics that needs, so, can realize the cold-cathode discharge lamp that dark starting characteristic is fabulous.
Illustrate below.
At the both ends of glass tube 2, be provided with by niobium constitute, the stick electrode 5b of total length 5mm, external diameter 1.0mm.One end of the absence of discharge side of electrode 5b is welded to connect with the inside lead-in wire 4 of external diameter 0.8mm.Inner lead-in wire 4 forms with the tungsten with the approaching material of the coefficient of expansion of the formation material of glass tube 2, the both ends that utilize inner lead-in wire 4 and glass tube 2 envelopes to end luminous tube 1, in the inside of luminous tube 1, mercury is enclosed with 8kPa with the rare gas (not shown) that mixes of neon with argon.His end of the inside lead-in wire 4 that one end is connected with electrode 5b is connected with the outside lead-in wire 7 of the nickel system of external diameter 0.6mm.
At the inner face of the other luminous tube 1 of electrode 5b, form the tunicle 9a of the thickness 2 μ m that constitute with metal by assistant starting.The assistant starting metal, be to constitute than the bigger metal of spraying plating quantities received under the rare gas condition of 100～600eV scope of the parent metal that forms electrode 5b by the spraying plating quantities received, here, adopt the aforementioned spraying plating quantities received nickel bigger than the parent metal niobium of electrode 5b.
This tunicle 9a forms in the following order.
On the surface of the niobium that forms electrode 5b, spraying plating quantities received (molecular) nickel bigger than niobium that the rare gas of the low energy of 100～600eV scope forms adopts electrolytic plating method, electric galvanoplastic, spraying plating steaming technology such as method and is covering.The thickness of nickel as described later, is approximately 5 μ m, and the thickness that be formed at the tunicle 8a of luminous tube 1 inner face this moment is about 2 μ m.
On the surface of niobium, be covered with the end of the electrode 5b of nickel, be connected with inner lead-in wire 4 by laser welding, according to common manufacture method assembling cold-cathode discharge lamp.
Fig. 5 is the state after just having assembled the last stage of the cold-cathode discharge lamp among Fig. 4.At this state, do not form tunicle 9a at the inner face of luminous tube 1, assistant starting forms tunicle 8a with the surface that the nickel of metal is capped on electrode 5b.
Then, if on this electrode 5b, feed high electric current, for example 15mA higher, carry out about 2 hours wearing out than common lighting current 6mA, in aging, cover the nickel generation splash of niobium surface,, form the tunicle 9a of the about 2 μ m of thickness the inner face covering of the luminous tube 1 by the electrode 5b.
Like this, on electrode 5b surface the tunicle 8a that is made of with metal assistant starting is set in advance, by the aging assistant starting that makes with metal generation splash, covering in the inner face of luminous tube 1, form the tunicle 9a of the assistant starting of uniform film thickness towards the inner face short time, can realize easily that the initial stage briliancy reduces the manufacturing little and cold-cathode discharge lamp that dark starting characteristic is good with metal near the luminous tube 1 of electrode 5b.
As the product of enforcement B, carry out investigation with the cold-cathode discharge lamp made like this about dark startability.
Experimental condition, be placed in the dark surrounds that ambient illuminance is 0.1Lux after 48 hours implementing product B, illumination is that 0.1Lux, environment temperature are, use the high-frequency lighting circuit (not shown) of output voltage as 1200Vrms under 0 ℃, calm condition around, and the dark start delay time is observed.The measurement result that obtains is shown in Fig. 9.
In addition, for relatively, replace the tunicle 9a that constitutes by nickel, make the lead oxide of the electronic emission material of the gold oxide attribute that electronics penetrates in the dark with the excitation energy that is lower than work function, make cold-cathode discharge lamp in the inner face coating of luminous tube 1.With this cold-cathode discharge lamp product B as a comparison, the dark start delay time is observed with aforementioned same experimental condition.The measurement result of the relatively product B that obtains is shown in Fig. 9.
As can be seen from Figure 9, implement product B and product B relatively, its average dark start delay time is indifference almost, and the maximum dark start delay time, relatively product B is 6030ms, and implementing product B is 280ms, generation big delay as product B relatively.To such (in the example 2) enforcement product B, the tunicle 9a that constitutes with metal by assistant starting in the inner face setting of luminous tube 1 near electrode 5b, slight discharge takes place between electrode 5b and the tunicle 9a that constitutes with metal by assistant starting, supply with and start the initial stage electronics that needs in the low-pressure discharge lamp, so, can realize the cold-cathode discharge lamp that dark starting characteristic is fabulous.
In addition, as shown in Figure 5, the electrode 5a that the tunicle 8a that is made of with metal assistant starting forms preferably is connected in the high-pressure side of lamp circuit.Promptly also, in aforementioned enforcement product B, because the both ends of low-pressure discharge lamp structure is identical, the electrode 5b that tunicle 8a forms is connected to the high-pressure side of lamp circuit, but, when for example the structure at both ends is other structure, assistant starting is set on its surface uses the electrode of a side of metal preferably to be connected with the high-pressure side of lamp circuit.
In order to confirm this point, the both ends of low-pressure discharge lamp are adopted the cold-cathode discharge lamp of other structure, as the product of enforcement C, the electrode that the side of the tunicle 8a that is made of with metal the assistant starting of these enforcement product C is not set is connected in the high-pressure side of lamp circuit, with the product of enforcement B similarity condition under the mensuration dark start delay time.Sample number is 100.The measurement result that obtains is shown in Fig. 9.
As can be seen from Figure 9, in the on high-tension side enforcement product C that the electrode of assistant starting with metal be connected in lamp circuit will be set, also frequently product B is good for dark starting characteristic, but, B compares with the product of enforcement, the average dark start delay time of the product of enforcement C has 250ms big, and there is 480ms the maximum dark start delay time.
This be because, when the output voltage of high-frequency lighting circuit adds, because the electrode that distance is near and stronger with the electric field that metal constitutes by intermembranous by assistant starting, make electrode with by assistant starting with being discharged that metal constitutes by intermembranous early period of origination, the cause that the initial stage electronic energy that starting in low-pressure discharge lamp needs obtains supplying with.Like this, the high-pressure side that the electrode of assistant starting with metal side is connected to lamp circuit is set, can improve dark startability.
In addition, in above stated specification, the example of using the tunicle 8a that is made of with metal assistant starting covering electrode 5b surface describes, but the invention is not restricted to this, and it is also passable with metal on electrode 5b surface assistant starting to be set at least.
(example 3)
Fig. 6 represents example 3 of the present invention.
Example 3 is with the difference of aforementioned example, substitutes stick electrode 5b with tubular electrode 5a, and the inner face near the luminous tube 1 of the peristome of electrode 5a forms the tunicle 9b that is made of with metal assistant starting.
Specifically, electrode 5a constitutes with molybdenum, and external diameter is 1.5mm, and internal diameter is 1.3mm, and total length is 3mm.At inner face, form the tunicle 9b of the thickness 2 μ m that constitute with metallic nickel by assistant starting near the luminous tube 1 of the peristome of electrode 5a.
This tunicle 9b forms like this: at the inner face of electrode 5a, in advance steaming by spraying plating forms thickness be about 5 μ m the nickel film, with the high electric current that is higher than conventional lighting current 6mA, for example 2～3 times the electric current of 15mA switch on for electrode 5a to wear out in about 2 hours, in aging, covered inner face by splash at the luminous tube 1 of close electrode 5a peristome at the inner face of electrode 5a, the nickel that steamed.
As the product of enforcement D, the electrode 5a of inner face formation nickel film is connected to the high-pressure side of lamp circuit, to measure the dark start delay time with aforementioned (example 2) similarity condition with the cold-cathode discharge lamp that constitutes like this.Sample number is 100.The measurement result that obtains is shown in Fig. 9.
As shown in Figure 9, the average dark start delay time of implementing product D is 70ms, and the maximum dark start delay time is 150ms, and is better than the dark startability of the enforcement product B of example 2.
Like this, adopt tubular electrode 5a as electrode, the assistant starting that is arranged at its inner face is being covered in the inner face of luminous tube 1 by splash with metal, distance between electrode 5a and the tunicle 9b that is made of with metal assistant starting is shorter than the cold-cathode discharge lamp of aforementioned example 2, electric field between electrode 5a and tunicle 9b is stronger, easier supply starts the initial stage electronics that needs, so dark starting characteristic can significantly improve.
In addition, in above stated specification, inner face at electrode 5a forms the tunicle that is made of with metal assistant starting, by aging, makes the inner face of splash in luminous tube 1, form tunicle 9b, but the invention is not restricted to this, as shown in Figure 7, also can form the tunicle 8b that constitutes with metal by assistant starting at the outer surface of electrode 5a, this tunicle 8b is equally through the overaging splash, at the inner face formation tunicle 9c of luminous tube 1.In addition, at Fig. 7, carry out aging about 30 minutes with electric current than aforementioned bigger 20mA, can not guarantee the electron number that only electrode inner face discharge needs, discharge is from the inboard of electrode 5a, and a part is poured the other outer surface of peristome into, and the splash of pouring strong peristome next door among the electrode 5a into is stronger, therefore, the thickness of tunicle 8b and tunicle 9c becomes thin towards the open end of electrode 5a.But it is aging further to increase electric current, can make discharge expand to outer peripheral face whole of tubular electrode 5b, makes tunicle 8b spraying plating fully, for example makes the such tunicle 9a of Fig. 4.
(example 4)
Fig. 8 represents example 4 of the present invention.
The difference of this example and aforementioned (example 3) is, tunicle 9d is formed near electrode 5a and does not form the inner face of luminous tube 1 of the part of luminescent coating 3.
Promptly also, cold-cathode discharge lamp at this example, with Fig. 6, cold-cathode discharge lamp difference among Fig. 7, luminescent coating 3 is not the position that extends with the outside subtend of electrode 5a, near the inner face of the luminous tube 1 the openend of electrode 5a, glass tube 2 exposes, and forms the tunicle 9d that is made of with metal assistant starting near the openend of electrode 5a.
Like this, not on luminescent coating 3, but the inner face of the glass tube 2 of surface smoothing directly make assistant starting with the metal splash, form tunicle 9d, so, can obtain the higher tunicle 9d of precision that specific surface has the tunicle that forms on several microns concavo-convex luminescent coatings 3.
As the product of enforcement E, electrode 5a is connected in the high-pressure side of lamp circuit, with the cold-cathode discharge lamp of such formation to measure the dark start delay time with aforementioned (example 2) similarity condition.Sample number is 100.The measurement result that obtains is shown in Fig. 9.
As shown in Figure 9, the average dark start delay time of implementing product E is 30ms, and the maximum dark start delay time is 120ms, and is better than the dark starting characteristic of the enforcement product D of aforementioned example 3.
In aforementioned example, electrode 5a as an example, 5b constitutes with single metal, but the invention is not restricted to this, constitute and can use with alloy and sintering metal, with single metal, alloy, and sintering metal combine with good.
In addition, in aforementioned example, the structure at the both ends of cold-cathode discharge lamp is identical, but the invention is not restricted to this, and at least one side's end is that aforementioned formation is also passable.
In addition, cold-cathode discharge lamp of the present invention is not limited to aforementioned example, and its size, design, material, shape, specification etc. can suitably be adjusted.In addition, electrode not only can adopt aforementioned stick electrode and tubular electrode, all if any not having the cylindric also passable of the end in the end, in addition, make tubular electrode have more than 2 layers inner face coating active material of structure and tubular electrode or the like, as long as effectively, do not add restriction in the practice.
According to aforementioned cold-cathode discharge lamp of the present invention, be with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the cold-cathode discharge lamp that material seals, the 1st tunicle that constitutes with metal by assistant starting at least one side's electrode setting, at inner face near the aforementioned glass tube of an aforementioned side's electrode, the 2nd tunicle that approaching aforementioned the 1st tunicle setting is made of with metal assistant starting, therefore, slight discharge takes place between the 1st tunicle that constitutes with metal by assistant starting and the 2nd tunicle, can supply with and start the initial stage electronics that needs in the cold-cathode discharge lamp, so dark starting characteristic is fabulous.
In addition, the manufacture method of cold-cathode discharge lamp of the present invention, make with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the cold-cathode discharge lamp that material seals the time, have the electrode of assistant starting in the configuration of at least one side's of aforementioned glass tube end with the 1st tunicle of metal, to enclose the material sealing simultaneously, feeding the electric current that surpasses conventional lighting current on former electrodes wears out, by this aging, aforementioned the 1st tunicle is carried out spraying plating, forming the 2nd tunicle with position that the aforementioned phosphors layer that is formed at the glass tube inner face does not overlap, under the state that the 1st tunicle does not disappear from the surface of former electrodes, finish aforementioned aging, form the 1st tunicle on the surface of electrode, inner face at aforementioned glass tube forms the 2nd tunicle, so, can easily realize cold-cathode discharge lamp of the present invention.
In addition, cold-cathode discharge lamp of the present invention, be have with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the cold-cathode discharge lamp of the luminous tube that material seals, the tunicle that the inner face setting of the aforementioned luminous tube by at least one side's electrode is made of with metal assistant starting, slight discharge takes place between tunicle that constitutes with metal by assistant starting and electrode, supply with the initial stage electronics that startup needs in the cold-cathode discharge lamp, so can realize the cold-cathode discharge lamp that dark starting characteristic is fabulous.
In addition, the manufacture method of cold-cathode discharge lamp of the present invention, manufacturing have with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the cold-cathode discharge lamp of the luminous tube that material seals the time, be provided with at least one side's of aforementioned glass tube end and have the electrode of assistant starting with metal
Wear out having the high electric current that aforementioned assistant starting feed to surpass conventional lighting current on the electrode of metal side, wear out, make aforementioned assistant starting to form the tunicle that constitutes with metal by assistant starting with the metal splash, at the inner face of aforementioned luminous tube by this, therefore, realize cold-cathode discharge lamp of the present invention easily.
Claims (14)
1. a cold-cathode discharge lamp is characterized in that,
With electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose material and seal,
In the periphery position relative of at least one side's electrode with the inner face of described glass tube, the 1st tunicle that is made of with metal assistant starting is set,
At inner face near the described glass tube of a described side's electrode, the 2nd tunicle that constitutes with metal by assistant starting near described the 1st tunicle setting.
2. cold-cathode discharge lamp as claimed in claim 1 is characterized in that,
Position not overlapping with the described luminescent coating that is formed at the glass tube inner face forms the 2nd tunicle.
3. cold-cathode discharge lamp as claimed in claim 1 or 2 is characterized in that,
The shape of described electrode is a tubular, and in the periphery of described electrode described the 1st tunicle is set.
4. cold-cathode discharge lamp as claimed in claim 1 or 2 is characterized in that,
The 2nd tunicle is alkali metal or alkaline-earth metal or their mixture.
5. cold-cathode discharge lamp as claimed in claim 1 or 2 is characterized in that,
Form the 1st tunicle with alkali metal compound or alkaline earth metal compound or their mixture,
Form the 2nd tunicle with alkali metal or alkaline-earth metal or their mixture.
6. cold-cathode discharge lamp as claimed in claim 5 is characterized in that,
Form the 1st tunicle with cesium compound, form the 2nd tunicle with caesium.
7. the manufacture method of a cold-cathode discharge lamp is characterized in that,
Make with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the cold-cathode discharge lamp that material seals the time,
Have the electrode of assistant starting at least one side's of described glass tube end configuration outer peripheral face, will enclose material simultaneously and seal with the 1st tunicle of metal,
The electric current that feed to surpass conventional lighting current on described electrode wears out, by this aging, described the 1st tunicle is carried out spraying plating, forming the 2nd tunicle with position that the described luminescent coating that is formed at the glass tube inner face does not overlap,
Under the state that the 1st tunicle does not disappear from the surface of described electrode, finish described agingly, form the 1st tunicle on the surface of electrode, form the 2nd tunicle at the inner face of described glass tube.
8. the manufacture method of cold-cathode discharge lamp as claimed in claim 7 is characterized in that,
Aging electric current is 2 to 3 times of conventional lighting current.
9. a cold-cathode discharge lamp is characterized in that,
Have with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the luminous tube that material seals,
Inner face near the described glass tube of at least one side's electrode is provided with the tunicle that is made of with metal assistant starting,
The assistant starting metal that forms described tunicle is that the spraying plating quantities received is than the bigger metal of spraying plating quantities received under the rare gas condition of 100～600eV scope of the parent metal that forms described electrode.
10. cold-cathode discharge lamp as claimed in claim 9 is characterized in that,
To the electrode of a side of the described tunicle that is made of with metal assistant starting be set at least, be connected the high-pressure side of lighting current.
11. as claim 9 or 10 described cold-cathode discharge lamps, it is characterized in that,
Described electrode is a tubular electrode.
12. as claim 9 or 10 described cold-cathode discharge lamps, it is characterized in that,
On the next door of at least one side's electrode and do not form the inner face of the luminous tube of luminescent coating, the tunicle that is made of with metal assistant starting is set.
13. the manufacture method of a cold-cathode discharge lamp is characterized in that,
Make with electrode be arranged at inner face form luminescent coating glass tube both ends and will enclose the cold-cathode discharge lamp that material seals the time,
Be provided with at least one side's of described glass tube end and have the electrode of assistant starting,, wear out having the high electric current that passes on the electrode of described assistant starting with a side of metal above conventional lighting current with metal,
By this aging, the described assistant starting metal of spraying plating, the tunicle that constitutes with metal by assistant starting in the inner face formation of described glass tube.
14. the manufacture method of cold-cathode discharge lamp as claimed in claim 13 is characterized in that,
Aging electric current is 2 to 3 times of conventional lighting current.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001147150 | 2001-05-17 | ||
| JP147150/01 | 2001-05-17 | ||
| JP147150/2001 | 2001-05-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1462469A CN1462469A (en) | 2003-12-17 |
| CN100377289C true CN100377289C (en) | 2008-03-26 |
Family
ID=18992677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028016246A Expired - Fee Related CN100377289C (en) | 2001-05-17 | 2002-04-18 | Cold cathode discharge lamp and method for manufacturing the lamp |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR100516607B1 (en) |
| CN (1) | CN100377289C (en) |
| TW (1) | TW564462B (en) |
| WO (1) | WO2002095792A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4674805B2 (en) * | 2005-07-14 | 2011-04-20 | 日立粉末冶金株式会社 | Method for producing electrode material for cold cathode fluorescent lamp |
| CN101512719B (en) * | 2006-09-15 | 2011-05-25 | 松下电器产业株式会社 | Electric discharge lamp, illuminator, and liquid crystal display |
| GB2475536B (en) | 2009-11-23 | 2016-05-18 | Heraeus Noblelight Ltd | A flash lamp, a corresponding method of manufacture and apparatus for the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09320533A (en) * | 1996-05-29 | 1997-12-12 | West Electric Co Ltd | Fluorescent discharge tube |
| JP2001076617A (en) * | 1999-08-31 | 2001-03-23 | Hitachi Ltd | Discharge tube and liquid crystal display device using discharge tube as illumination light source |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2714477B2 (en) * | 1990-09-10 | 1998-02-16 | 東芝ライテック株式会社 | Cold cathode discharge lamp, illumination device using the same, and liquid crystal display device |
| JPH06342643A (en) * | 1993-06-01 | 1994-12-13 | Matsushita Electron Corp | Rapid starting type fluorescent lamp |
| JPH09326246A (en) * | 1996-04-01 | 1997-12-16 | Harison Electric Co Ltd | Cold cathode low pressure discharge lamp |
| JPH10312887A (en) * | 1997-05-12 | 1998-11-24 | Harison Electric Co Ltd | Cold cathode discharge lamp lighting device |
| JP2001015065A (en) * | 1999-06-29 | 2001-01-19 | Nec Lighting Ltd | Cold cathode fluorescent lamp and manufacture thereof |
-
2002
- 2002-04-18 WO PCT/JP2002/003892 patent/WO2002095792A1/en active IP Right Grant
- 2002-04-18 CN CNB028016246A patent/CN100377289C/en not_active Expired - Fee Related
- 2002-04-18 KR KR10-2003-7000560A patent/KR100516607B1/en not_active IP Right Cessation
- 2002-05-06 TW TW091109349A patent/TW564462B/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09320533A (en) * | 1996-05-29 | 1997-12-12 | West Electric Co Ltd | Fluorescent discharge tube |
| JP2001076617A (en) * | 1999-08-31 | 2001-03-23 | Hitachi Ltd | Discharge tube and liquid crystal display device using discharge tube as illumination light source |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100516607B1 (en) | 2005-09-22 |
| KR20030014334A (en) | 2003-02-15 |
| WO2002095792A1 (en) | 2002-11-28 |
| TW564462B (en) | 2003-12-01 |
| CN1462469A (en) | 2003-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100499017C (en) | Cold cathode discharge lamp | |
| US5962977A (en) | Low pressure discharge lamp having electrodes with a lithium-containing electrode emission material | |
| US6809478B2 (en) | Metal halide lamp for automobile headlight | |
| US5783912A (en) | Electrodeless fluorescent lamp having feedthrough for direct connection to internal EMI shield and for supporting an amalgam | |
| KR100854648B1 (en) | Cold-cathode fluorescent lamp | |
| DE60020476T2 (en) | High frequency excited point light source lamp device | |
| US20080252193A1 (en) | Fluorescent Lamp, Backlight Unit and Liquid Crystal Television | |
| CN1151540C (en) | Metal halide lamp | |
| CN100377289C (en) | Cold cathode discharge lamp and method for manufacturing the lamp | |
| US4560903A (en) | High pressure discharge lamp | |
| CN100521065C (en) | Cold cathode ray fluorescent tube and liquid crystal display device using the cold cathode fluorescent tube | |
| KR100604404B1 (en) | Low-pressure mercury vapor discharge lamp | |
| US4219757A (en) | Gas discharge lamp | |
| JP4199022B2 (en) | Cold cathode fluorescent lamp | |
| JPH11219682A (en) | Cathode for discharge lamp | |
| ITRM20080334A1 (en) | FLUORESCENT LAMP WITH HOT CATODO CONTAINING A DEVICE FOR RELEASING MERCURY AND GETTER | |
| JP3497153B2 (en) | Cold cathode discharge lamp and method of manufacturing the same | |
| CN101053057A (en) | Electrode, fabricating method thereof, and cold cathode fluorescent lamp | |
| JP2801790B2 (en) | Discharge lamp electrode | |
| EP0523782A2 (en) | High-pressure sodium lamp | |
| JP2801791B2 (en) | Discharge lamp electrode | |
| JP2000133200A (en) | Cold cathode and cold-cathode fluorescent tube | |
| JPH05174784A (en) | Electrode for discharge lamp | |
| SU1014069A1 (en) | Gas-discharge electrodeless high-frequency lamp | |
| JP3970418B2 (en) | Discharge tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080326 Termination date: 20100418 |