CN1322373A - Fluorescent lamp - Google Patents
Fluorescent lamp Download PDFInfo
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- CN1322373A CN1322373A CN00801998A CN00801998A CN1322373A CN 1322373 A CN1322373 A CN 1322373A CN 00801998 A CN00801998 A CN 00801998A CN 00801998 A CN00801998 A CN 00801998A CN 1322373 A CN1322373 A CN 1322373A
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- Prior art keywords
- glass tube
- fluorescent lamp
- supply line
- current supply
- outer electrode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/067—Main electrodes for low-pressure discharge lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/16—Selection of substances for gas fillings; Specified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
A fluorescent lamp, wherein a discharge medium containing xenon gas is sealed in a glass tube, formed on the inner wall surface thereof with a phosphor coating and at the opposite ends thereof with sealing elements. An internal electrode is disposed at one end in the glass tube, and a first feeder lead wire is connected with the internal electrode after passing through one of the above sealing elements air-tightly. An external electrode, consisting of a lead wire spirally coiled along a tube axis direction, is provided on the outer peripheral surface of the glass tube. A second feeder lead wire, buried at one end thereof in a sealing element and led out at the other end thereof to the outside of the glass tube, is provided at the other end of the glass tube, and an end of the external electrode is electrically connected with the second feeder lead wire and mechanically fixed. A light transmitting resin film layer is spread on the outer peripheral surfaces of the external electrode and the glass tube to thereby integrally fix the external electrode to the outer peripheral surface of the glass tube.
Description
Technical field
Fluorescent lamp of the present invention particularly relates to fluorescent lamp, particularly relates to the fluorescent lamp of the light source that the background light of the liquid crystal indicator that uses in the electronic equipments such as being suitable as PC, auto navigation uses.
Background technology
For example in the liquid crystal indicator that in electronic equipments such as PC or auto navigation, uses, use fluorescent lamp as the background light light source of using to liquid crystal board uniform irradiation light from the back side.Fluorescent lamp as such background light light source, along with the display area of liquid crystal indicator being maximized and the proposition of the requirement of device slimming, high performance, also there are luminous lamp tube minor diameterization, pipe range to increase to fluorescent lamp itself, simultaneously in-40 ℃～85 ℃ large-temperature range or stable under the control of the light intensity of one of a few percent～percentage hundred, and sufficient light intensity is arranged, and luminescence distribution evenly waits requirement on tube axial direction.
The fluorescent lamp of the light source of using as such background light in the past, be extensive use of with the lamp of mercury vapour as discharge gas, but this lamp not only has the shortcoming of luminous intensity deficiency under the situation that temperature is low around, simultaneously owing to mercury possibility contaminated environment, so wish that the fluorescent lamp that does not use mercury vapour can be arranged.
On the other hand, the Japan Patent spy opens and discloses on the clear 57-63756 communique with small-sized discharge lamp or the fluorescent lamp of the such inactive gas of neon, krypton gas or xenon as discharge gas.There is one to be arranged in the glass tube in two electrodes of this discharge lamp, another electrode is arranged at outside the glass tube, and the length direction of the electrode in the described glass tube along glass tube is provided with on the almost whole length of glass tube, and the outer electrode of described glass tube is arranged at the glass tube periphery, and be with above-mentioned glass tube in the electrode that is provided be oppositely arranged.And this discharge lamp is caliber 2mm～10mm, the miniaturization discharge lamp of pipe range 50mm～200mm, also disclose and utilized a linearity or crooked discharge lamp or its a plurality of combination, use as luminous demonstration means, also as guiding indicator light or the identification light of economizing the energy type with literal, numeral or mark etc.
But, in the discharge lamp or fluorescent lamp of existing this structure, on the whole length of internal electrode, be difficult to do internal electrode equally with the arcing distance between the outer electrode, the result can cause partial discharge, can not form stable arc light beam on whole length of glass tube.That is, in the light source that the device of lamp as a setting of liquid crystal indicator is used, use for example external diameter 1.6mm～10mm of glass tube, elongated tubular fluorescent lamp about length 100～500mm, but in such glass tube, to be extremely difficult electrode being set on the whole length and keep arcing distance to coexist mutually making.
Again, in liquid crystal indicator, the influence that fluorescent lamp is vibrated under its user mode is many, thereby internal electrode generation local deformation, so arcing distance is difficult to often keep necessarily.
Also have, in liquid crystal indicator, also the handlebar glass tube is processed into the complicated shape light source situation about using as a setting as " W " type pipe or " U " type pipe, in such structure will internal electrode be done so that its in whole fluorescent tube length, keep with outer electrode between arcing distance identical be extremely difficult.
And, in existing discharge lamp with said structure or fluorescent lamp, even on whole length, form the glow district, also because in case use comprises the discharge medium of xenon as discharge gas, the electronics emission will come to life around internal electrode, therefore be not easy to form diffusion arc light beam, consequently, ultraviolet being suppressed.Therefore have such shortcoming, if promptly such electrode structure be used in ultraviolet ray exited luminous be the phosphor coated of purpose in the discharge lamp with luminescence of glass tube inwall, just can not obtain enough brightness.
Thereby the present invention is to be the invention of purpose with the above-mentioned existing problems that solve existing fluorescent lamp.That is to say the objective of the invention is to that providing with the rare gas that comprises xenon is discharge medium, can be luminous with sufficient brightness stability, the fluorescent lamp that the background light light source of liquid crystal indicator is used.
Summary of the invention
Fluorescent lamp of the present invention, it is characterized in that, by the two ends gas-tight seal, the inner glass tube of enclosing discharge medium, the luminescent coating that forms at this glass tube internal face, the end configuration in this glass tube, apply the internal electrode of a current potential, between the two ends of described glass tube along tubular axis with the pitch of regulation do helical coil around lead, and the outer electrode that applies another current potential constitutes.
Again, fluorescent lamp of the present invention is characterized in that described discharge medium is made of the mist of xenon or xenon and other rare gas.
Also have, fluorescent lamp of the present invention is characterized in that, described outer electrode and described glass tube one are reinstated transparent resin film and covered its peripheral surface, with this described outer electrode are fixed on the described peripheral surface of described glass tube integrally.
Again, fluorescent lamp of the present invention, it is characterized in that, possess at internal face and form fluorophor by overlay film, two ends form sealing, enclose the glass tube of discharge medium in inside, connect the 1st current supply line of the sealing of this glass tube one side airtightly, be connected in the internal electrode of the leading section in the described glass tube of extending to of this current supply line, one end is embedded in another sealing of described glass tube, the other end is drawn the 2nd outer current supply line of described glass tube, and along tube axial direction in the outer surface helical coil of described glass tube around, the outer electrode that end and described the 2nd current supply line are electrically connected and the conductor wire of mechanical fixation constitutes.
Also have, fluorescent lamp of the present invention is characterized in that, an end is embedded in the 2nd interior current supply line of another sealing of described glass tube, and expose in described glass tube inside its end.
Also have, fluorescent lamp of the present invention is characterized in that, the end coiling around described the 2nd current supply line that constitutes the conductor wire of described outer electrode is installed with.
Also have, fluorescent lamp of the present invention, it is characterized in that reeling around described the 2nd current supply line and be installed with in the end that constitutes the conductor wire of described outer electrode, its coiling direction is identical with coiling direction at the conductor wire of the described outer electrode of formation of the peripheral surface of described glass tube.
Also have, fluorescent lamp of the present invention is characterized in that, the peripheral surface that comprises the glass tube of described outer electrode covers with the transparent resin film layer, with this described outer electrode is fixed on the peripheral surface of described glass tube integrally.
Also have, fluorescent lamp of the present invention is characterized in that, interior described the 2nd current supply line of another sealing that an end is embedded in described glass tube forms the joint portion in its end.
Also have, fluorescent lamp of the present invention is characterized in that, described discharge medium is made of the gas that xenon or xenon and other rare gas mix.
Again, fluorescent lamp of the present invention, it is characterized in that, possesses the glass tube that two ends form sealing, the fluorophor that forms at this glass tube internal face is by overlay film, enclosed the discharge medium that comprises rare gas in the described glass tube, connect the sealing of described glass tube one side and keep the 1st current supply line of gas-tight seal, be arranged at the internal electrode of the leading section of the 1st current supply line, one end is embedded in another sealing of described glass tube, the other end is drawn the 2nd outer current supply line of described glass tube, be formed at the determining positions portion of the peripheral surface of described glass tube, and be directed into this determining positions portion, along the glass tube tube axial direction on the almost whole length of the peripheral surface of described glass tube in its peripheral surface helical coil around, the outer electrode of the conductor wire formation that is connected and fixed of an end and described the 2nd current supply line simultaneously.
Also have, fluorescent lamp of the present invention is characterized in that, the peripheral surface that comprises the glass tube of described outer electrode is covered with the transparent resin film layer, with this described outer electrode is fixed on the peripheral surface of described glass tube integrally.
Also have, fluorescent lamp of the present invention is characterized in that, described discharge medium is made of the mist of xenon or xenon and other rare gas.
Summary of drawings
Fig. 1 is the fluorescent lamp side view of expression the present invention the 1st example.
Fig. 2 is the key diagram of the structure of the sectional arrangement drawing of fluorescent lamp shown in Figure 1 and attachment point circuit for lamp.
Fig. 3 amplifies the sectional arrangement drawing that shows with an end of the fluorescent lamp of Fig. 2.
Fig. 4 is the sectional arrangement drawing of the fluorescent lamp of another example of the present invention.
Fig. 5 is the key diagram of the structure of the sectional arrangement drawing of fluorescent lamp shown in Figure 4 and attachment point circuit for lamp.
Fig. 6 amplifies the sectional arrangement drawing that shows with an end of the fluorescent lamp of Fig. 5.
Fig. 7 is the winding process brief description figure that the coiling outer electrode is used on the fluorescent lamp of Fig. 4, (a) is top view, (b) is profile.
Fig. 8 represents to adopt the drive condition of fluorescent lamp of the present invention of the power supply 18 of the usefulness of lighting a lamp shown in Figure 5.
Fig. 9 is the drive condition of the fluorescent lamp of the present invention of the expression power supply 18 that adopts the usefulness of lighting a lamp shown in Figure 5 equally.
Figure 10 is to be the transverse axis and the longitudinal axis with the frequency of tube power shown in Figure 4 (watt) and the pulse that drives usefulness respectively, and the curve that the pulse frequency zone of stabilized illumination under the power of lamp tube that provides is depicted as is provided.
Figure 11 is with respect to the make comparisons curve of expression of the luminous intensity variations of power of lamp tube and existing mercury vapor lamp type and xenon lamp type fluorescent lamp with fluorescent lamp in the above-mentioned example.
Figure 12 utilizes the PWM light-dimming method to carry out under the situation that brightness adjusts in fluorescent lamp of the present invention shown in Figure 4, and expression is with respect to the curve chart of the complete relatively light beam (%) of the duty ratio of dim signal.
Figure 13 is the stereogram that expression is assembled with the structure of the background light unit that the liquid crystal indicator of fluorescent lamp of the present invention uses.
Figure 14 is the sectional arrangement drawing of the fluorescent lamp of another example of expression the present invention.
Figure 15 be in when carrying or the fluorescent lamp of said structure applied external force with externally applied forces same degree usually consciously when handling operation after apply desired high frequency voltage, measure the result curve figure that briliancy on the glass tube direction of principal axis is asked luminescence distribution respectively.
Figure 16 is the sectional arrangement drawing of structure of the fluorescent lamp end of expression the present invention another example.
Figure 17 represents the variation of the 2nd current supply line 114b.
Preferred forms of the present invention
With reference to the accompanying drawings example of the present invention is elaborated.
Fig. 1 is the side view of the structure of expression fluorescent lamp of the present invention.Fig. 2 is the sectional arrangement drawing of structure that expression comprises the fluorescent lamp of lamp circuit.Fig. 3 amplifies the sectional arrangement drawing that shows with the end of the fluorescent lamp of Fig. 2.
In these figure, fluorescent lamp of the present invention possesses the glass tube 11 that works as luminous tube, and the two ends of this glass tube 11 are by sealing 12a, 12b gas-tight seal.The inwall of this glass tube 11 is formed with fluorophor by overlay film 13.
Here, glass tube 11 is of a size of, external diameter 1.6～10mm for example, about length 50～500mm, the inner space of its gas-tight seal enclose the such rare gas of xenon for example or based on the mixing rare gas of xenon as discharge gas.
The sealing 12a of one side of glass tube 11 is provided with the 1st current supply line 14a that connects its inside and gas-tight seal, and the front end that extends to the interior volume of gas-tight seal is provided with internal electrode 15 cylindraceous.This internal electrode 15 is made of for example nickel plate, is the about 2.0mm of internal diameter, the about 4.0mm's of length, an end has the cylinder of bottom.In order to reduce light tube electric voltage, also can be easy to the material of emitting electrons in the inside and outside wall setting of internal electrode again.Here, the material that is easy to emitting electrons is to use the emitter that uses in cold-cathode fluorescence lamp, for example based on the material of the boride of rare earth elements such as alkaline earth oxides such as barium monoxide, lanthanum boride.Also have, this internal electrode 15 is that metal etc. is a material with Ni such as for example Ni or Ni alloys, can make cylindric, tabular or " V " word shape.And under cylindric or columned situation, facing to the end face of the discharge space preferably round table-like body of reduced or the structure of coniform body.Again, the size of internal electrode is usually corresponding with the diameter of employed glass tube etc., and external diameter is got about 0.6～2.0mm, and length is got about 2～5mm.
Secondly, the 1st current supply line 14a is that for example diameter is about the cobalt of 0.4mm or wire rod or the bar that tungsten is made, and the diapire face of cylinder-like body is welded or be riveted in an end, and the other end is drawn from the sealing 12a of glass tube 11.
Again, in the peripheral surface setting of glass tube along the tube axial direction outer electrode 16 that helical coil forms around the Ni of about 0.1mm lead on its about whole length.Also have, this outer electrode 16 can use formations such as Ni line about diameter 0.05～0.5mm or copper cash.Here, in order to be reduced in the power consumption on the outer electrode, the material of outer electrode 16 preferably resistivity is 2 * 10
-4The material that Ω cm is following, again, circles such as preferably positive circular, oval, Long Circle of the shape of its section or semicircle, or triangle, quadrangle, rectangle or polygon such as trapezoidal or with these shape similar shapes.
In order to obtain distributing along the roughly uniform luminous intensity distribution of tubular axis, this outer electrode 16 is reeled with the spacing of regulation along the tubular axis of glass tube 11.That is the winding department of outer electrode is about about 0.1～10mm apart from depending on the external diameter (or internal diameter) of glass tube, for the luminous intensity distribution that obtains stipulating distributes, corresponding to position change, the adjustment of glass tube.For example, along with more and more far away from internal electrode, winding department just can access roughly uniform light distribution characteristic on tube axial direction apart from diminishing continuously or piecemeal.
Here, it is to say that the continuity of so-called winding department distance changes, and the distance corresponding to leave a side end of configuration internal electrode 15 in the glass tube on tube axial direction changes the winding department distance continuously.
Again, the variation of the segmented of so-called winding department distance can be enumerated following situation.That is, can enumerate part with the coiling lead of glass tube outside wall surface in the interval that is divided on the glass tube direction of principal axis more than 2,
(a) in each interval, make winding department apart from keeping respectively evenly, along with the increasing of inter-electrode distance, each interval is changed the situation of winding department distance in regular turn,
(b) the winding department distance with the end between adjacent region is a upper and lower bound, in being no more than the scope of this spacing, continuously change each interval winding department distance, change the situation of the average winding department distance of each interval per unit length simultaneously arbitrarily corresponding to distance with internal electrode
(c) each interval interior winding department distance immobilizes or makes its slow variation, and makes the winding department distance situation jumpy of each section boundaries part,
(d) situation of the two or more combinations among above-mentioned (a) and (b), (c) etc.
Like this along with more and more far away from internal electrode 15, winding department is apart from more and more diminishing, just can access on tubular axis roughly uniform, or desirable light distribution characteristic.
The peripheral surface of the outer electrode 16 of Gou Chenging like this, the resin film layer 17 such with for example transparent heat-shrinkable tube covers, and the spacing of electrode immobilizes on tube axial direction.Preferably for example the pipe of the pet resin of heat-shrinkable, polyimide resin or fluororesin etc. or film etc. have appropriate stable on heating material to this resin film layer 17.
Secondly, at another sealing 12b of glass tube 11 end is set and is embedded in the 12b of sealing portion, the other end is drawn the 2nd current supply line 14b of described glass tube outside.At this moment, lead 14b does not contact with discharge medium.The 2nd current supply line 14b is by Ni line, cobalt line or Dumet (dumet) silk wire rods such as (copper-clad iron-nickel alloy line contain 42%Ni) or the banded foil of nickel or molybdenum etc. or the sheet material formation of for example about 0.1～2.0mm of external diameter.The 2nd current supply line 14b imbeds can adopt in the sealing 12b glass sleeve (bead stem) that covers with glass dielectric layer etc. is made on the surface of the 2nd current supply line 14b, this stem is placed the method that seals with flame heat again in the end of glass tube 11, or adopt in advance a end with the 2nd current supply line 14b to insert in the end of the glass tube 11 before the sealing, method such as bury underground with the flame heat glass tube again.
Again, the metal wire that constitutes the 2nd current supply line 14b can be to use the metal wire of commaterial, also can be the part in glass, burying underground, seal with draw hermetic unit outside the part that is connected with voltage supply line 18b use the metal wire of different materials.For example be sealed in part in the glass in order to improve the sealing intensity with glass, adopt cobalt line or Dumet wire, and the part that is connected with voltage supply line 18b used in order to improve welding performance, use nickel wire etc.
On the 2nd current supply line 14b, in the part of drawing glass tube 11 outsides, utilize electric welding, soldering or rivet 9 connect, the end of fixed outer electrode 16.
Then, at internal electrode 15 and outer electrode 16, by the 1st current supply line 14a and the 2nd current supply line 14b and voltage supply line 18a and 18b, apply the high-frequency pulse voltage of regulation, for example pulse voltage of 20～100kHz, 1～4kV with power supply 18 respectively from for example comprising lighting a lamp of inverter.Consequently, between two electrodes 15,16, begin to discharge, ultraviolet light takes place in glass tube 11.Like this, the fluorophor of ultraviolet excitation glass tube 11 internal faces of generation is transformed to visible light by overlay film 13, outside the directive glass tube 11, plays a part fluorescent lamp.
The fluorescent lamp of the present invention of Gou Chenging like this, near the internal electrode 15 of the pipe internal configurations of a utilization end of glass tube 11 and the simple electrode structure that the outer electrode 16 that glass tube 11 peripheral surfaces are provided with constitutes can send the stable fluorescence based on the high luminous intensity of the discharge of xenon.
Again, the internal electrode 15 of fluorescent lamp of the present invention, can use in the end in the glass tube 11 with more much smaller than the total length of glass tube 11, therefore existing internal electrode with internal electrode same general configuration of using in the xenon type fluorescent lamp of two internal electrodes can existing manufacturing technology easy to use be made.
Also have, the outer electrode 16 of fluorescent lamp of the present invention is owing to use 17 linings of heat-shrinkable resin film layer fixing on its peripheral surface, and its spacing can remain in setting always, therefore can make it along the tubular axis uniformly light-emitting, and can guarantee high luminous output.That is to say that in the fluorescent lamp of the present invention that constitutes as mentioned above, outer electrode 16 is around in the peripheral surface of glass tube 11 with the spacing helical coil of regulation, its winding department is apart from influential to luminescence distribution on the tube axial direction and light output.Therefore, the peripheral surface of the glass tube 11 of the outer electrode 16 of reeling covers with transparent resin rete 17, and outer electrode 16 is carried out insulation protection, simultaneously with helical coil around coil closely be fixed in the peripheral surface of glass tube 11.
Also have, the end of this outer electrode 16 is welded in the 2nd current supply line 114b with scolding tin 19, therefore the 2nd current supply line 114b one end is embedded in again in another sealing 12b of glass tube 11, can prevent to be subjected to owing to outer electrode 16 change or the broken string accident of the spacing that external force takes place.That is to say, because outer electrode 16 is to form with the thin wire below the 0.5mm of line footpath, tensile strength is limited, when coiling is assembled to the peripheral surface of glass tube 11, when distribution is connected in the power supply 18 of the usefulness of lighting a lamp, break easily when being assembled in liquid crystal indicator or under other situations.Under the bigger situation of the external force that puts on outer electrode 16, might cause resin film layer 17 breakages or make outer electrode 16 produce offset, winding department apart from variation again.But in the present invention, as mentioned above, the 2nd current supply line 14b is set, is connected and fixed the exit of outer electrode 16 thereon, solve above-mentioned existing problems, can often be kept the stable big fluorescent lamp of light output with this.
Fig. 4～Fig. 6 represents the present invention's the 2nd example.Fig. 4 is the side view of fluorescent lamp.Fig. 5 is the sectional arrangement drawing that comprises the fluorescent lamp of lamp circuit.Fig. 6 amplifies the sectional arrangement drawing that shows with the end of the fluorescent lamp of Fig. 5.In these figure, the component part identical in fact with the component part of the fluorescent lamp of Fig. 1～shown in Figure 3 used identical symbol, omits it and describes in detail, and the part that constitutes with difference is that the center describes below.
In the present embodiment, the external diameter of glass tube 11 is 3.0mm, and fluorescent tube length is 176mm, is formed with red, green, blue three mixture of colours luminescent coatings 13 on its inwall, and discharge medium uses the mist of xenon and neon.
The mounting structure of such outer electrode 16 is effective at the peripheral surface of glass tube 11 with the manufacturing process that the spacing coiling of stipulating constitutes the thin wire of outer electrode 16 for utilizing coil winding machine.That is to say that Fig. 7 is the skeleton diagram of the such winding process of expression.(a) figure is a top view, and (b) figure is a profile.As shown in the drawing, making glass tube 11 is that rotating shaft rotates on the direction shown in the arrow A with certain speed, with its tubular axis, and goes up to move apart from corresponding speed with winding department at tube axial direction (direction shown in the arrow B).Send the metal wire 72 that applies certain tension force from the metal wire mouth 71 that glass tube 11 vertical directions are disposed again.When using the coiling of such Winder, coiling is from the 2nd current supply line 114b of the end that is embedded in glass tube 11.In when beginning coiling, reduce the speed that glass tube 11 moves to the arrow B direction, the root of the 2nd current supply line 114b close around, make spacing be almost 0.Then improve the speed that glass tube 11 moves to the arrow B direction, reel with the spacing of regulation at the peripheral surface of glass tube 11.In this case, glass tube 11 is slowly risen to the speed that the arrow B direction moves towards the other end 12a, can strengthen winding spacing with this.Therefore the coiling of the helical form of outer electrode 16 can progressively diminish to other end 12b spacing from the end 12a of the internal electrode 15 of configuration glass tube 11.
Again, with the coiling while since the 2nd current supply line 114b outer electrode 16, utilization this part close around method winding overhang is fixed, therefore the situation of winding sagging or offset can not take place in winding process, so can be with correct spacing coiling.
And after coiling finishes also fixing winding overhang on the 2nd current supply line 114b, therefore even when distribution, when being assembled into liquid crystal indicator or during carrying, can not take place that winding unclamps or the situation of offset, so can keep correct winding department distance yet.
Fig. 8 and Fig. 9 represent to adopt shown in Figure 5 lighting a lamp with the drive condition of the fluorescent lamp of the present invention of power supply 18.Under the situation of xenon type fluorescent lamp, the arc light beam forms slice state (the arc light beam of contraction) easily, and this is that luminous action is unstable because irregular mobile, and luminous intensity also has the tendency of decline.In order to prevent to form the arc light beam of such contraction, use the power supply 18 of the pulse power usually as the usefulness of lighting a lamp, be necessary its frequency is adjusted.
Fig. 8 (a) is the empirical curve of relation of the discharging current of the impulse waveform used of such fluorescent lamp drive and fluorescent lamp.That is use crest voltage to be 1kV in the impulse waveform that drives usefulness, and pulse power is 3.0 watts, and frequency is 40kHz, and duty ratio (D) is under the situation of 45% waveform, and be 7 microseconds discharge stand-down of discharge current waveform.This result is shown in Fig. 8 (b), and the discharge arc column part 82 of the contraction in the discharge arc column 81 reaches the central portion of glass tube 11, shows unsettled luminous action.
Fig. 9 (a) is that frequency adopts 20kHz, the empirical curve of the relation of the impulse waveform that other conditions are identical and the discharging current of fluorescent lamp.The discharge off time of the discharge current waveform under this situation is 18 microseconds, shown in this Fig. 9 (b), do not form the discharge arc column that shrinks, discharge arc column 91 expands on the almost whole length of glass tube 11 to the state (the discharge arc column of expansion) of the diametric(al) expansion of glass tube 11, can confirm to access stable and the fully ultraviolet luminous action of intensity.
Figure 10 (offers the power of fluorescent lamp with power of lamp tube respectively during the fluorescent lamp discharge.Unit: watt) the some modulation frequency with driving pulse is the transverse axis and the longitudinal axis, and the curve that the pulse frequency of lighting a lamp of stabilized illumination is depicted as under the power of lamp tube that provides is provided.From this curve as can be known, the operating state of fluorescent lamp can be divided into the light-emitting zone 103 of stable light-emitting zone 101, unsettled light-emitting zone 102, undercapacity.Again, the pressure of Figure 10 (a) and (b), (c) expression discharge gas is respectively the situation of 8.0kPa, 13.3kPa, 18.6kPa.According to these curves of obtaining from experiment, utilize the method that adds atmospheric pressure can enlarge stabilized illumination zone 101 as can be known.
Figure 11 is the curve that fluorescent lamp in the above-mentioned example is made comparisons and demonstrated with respect to the luminous intensity of power of lamp tube and existing mercury vapor lamp type and xenon lamp type fluorescent lamp.Curve 121 is represented fluorescent lamp of the present invention among the figure, curve 122 expression possesses the existing mercury type fluorescent lamp of 2 internal electrodes, curve 123 expressions possess 2 internal electrodes, utilize the existing xenon type fluorescent lamp of pulsed drive, curve 124 expressions possess 2 internal electrodes, utilize the existing xenon type fluorescent lamp of sine wave drive, the curve of complete relatively light beam (%).
From this curve as can be known, the full light beam of fluorescent lamp of the present invention is more than 2 times of existing xenon type fluorescent lamp, compare with existing mercury type fluorescent lamp also reach its 50%.
Also have, also have the stable light output characteristic of not glimmering even fluorescent lamp of the present invention possesses under the situation of brightness from 2% to 100% being carried out light modulation on a large scale.Figure 13 utilizes the PWM light-dimming method to carry out under the situation that brightness adjusts, and expression is with respect to the curve of the complete relatively light beam (%) of the duty ratio of dim signal.
Figure 13 is the stereogram that expression is assembled with the structure of the background light unit that the liquid crystal indicator of fluorescent lamp of the present invention uses.The unit that the LCDs that this background light unit is 7 feet sizes is used, the both sides of light guide plate 141 respectively dispose the fluorescent lamp 142 of two the invention described above.Two fluorescent lamps 142 of light guide plate 141 both sides configuration are contained in respectively in the reflector 143 of the side setting of light guide plate 141.And at the upper surface lamination prismatic lens and the scattering sheet 144 of light guide plate 141, lower surface lamination reflector plate 145.
Its thickness of the background light of Gou Chenging is 11mm like this, is 11 watt-hours at power of lamp tube, and the briliancy of background light unit is 6000cd/m
2, the background light unit that uses in the display unit of using as auto navigation can access enough briliancy.
Figure 14 is the sectional arrangement drawing of the fluorescent lamp of another example of expression the present invention.The part identical with Fig. 1～Fig. 3 is marked with identical symbol among the figure, omits its explanation.
Fluorescent lamp shown in Figure 14 the peripheral surface of glass tube 11 form one or more location divisions 11a that groove for example or jog constitute ...Winding location division 11a ... be arranged at lead that beginning on the peripheral surface of glass tube 11 reels constitutes outer electrode 16 or the both ends of reeling and finishing, or position in the middle of it.These location divisions 11a ... the winding spacing of the outer electrode 16 that changes corresponding to continuous variation or segmented along the tubular axis of glass tube 11 forms continuously in advance or forms with suitable spacing as mentioned above.Then, serve as that guiding is reeled with these location divisions 11a, can carry out and the coiling that designs the correct spacing that is consistent with this, coiling work has also just become easily.
Also have equally, be covered with the such transparent resin film 17 of one deck heat-shrinkable pitch tube, outer electrode 16 is fixed in the peripheral surface of glass tube 11 at the peripheral surface of the glass tube 11 that comprises outer electrode 16 with the 1st and the 2nd example.Again, the end 16b of the lead of outer electrode 16 reels, is connected and fixed on the 2nd interior current supply line 114b of another sealing 12b that the one end is embedded in glass tube 11.Thereby, even externally electrode 16 has the effect of external force, also can stop winding on tube axial direction, to move, therefore, the inhomogeneous situation of the luminous intensity distribution on the glass tube tube axial direction can be improved greatly, can prevent that light output from descending simultaneously.
Also have, winding location division 11a ... be not limited to the groove shape, also can be the protuberance of formation such as glass or block outer electrode 6 with groove and protuberance.Also have, the formation position or the number of these location divisions also can be selected as required.
Figure 15 be in when carrying or the fluorescent lamp of said structure applied external force with externally applied forces same degree usually consciously when handling operation after apply desired high frequency voltage, measure the curve chart that briliancy on the glass tube direction of principal axis is tried to achieve luminescence distribution respectively.Shown in curve A among the figure, fluorescent lamp of the present invention has glorious degrees much at one on the whole length of glass tube, also have, the curve B of this figure is represented in order to compare with fluorescent lamp of the present invention, to directly outer electrode 16 not drawn, shown again on the peripheral surface of glass tube 11 yet not forming location division 11a by the 2nd current supply line 114b ... the luminous intensity distribution of fluorescent lamp when applying with top described identical external force distribute.
Also have, the curve of Figure 15, its transverse axis represent and the distance (cm) of the end 12a of internal electrode 15 1 sides of glass tube 11 that the longitudinal axis is represented briliancy (cd/m
2).
Figure 16 is the sectional arrangement drawing of structure of the fluorescent lamp end of expression the present invention another example.In the figure, the part identical in fact with the modulated structure of above-mentioned each example is marked with identical symbol, and it illustrates omission.
In above-mentioned each example, the one end is embedded in the 2nd current supply line 114b in another sealing 12b of glass tube 11 under the situation that the coefficient of thermal expansion of its coefficient of thermal expansion and glass tube is similar to, and is adjacent to mutually, is firmly fixed in the sealing 12b.But when both coefficient of thermal expansion has very big-difference, or sealing 2b is when the burner situation of heating is bad when forming, the sealing of worrying the 2nd current supply line 114b and the 12b of air seal portion is not enough, under situation such as when lighting a lamp power supply wiring, during conveyance or during the assembling fluorescent lamp, the 2nd current supply line 114b might be pulled out from sealing 2b.
Therefore, in this example, the leading section of burying underground in the sealing 2b of the 2nd current supply line 114b as shown in figure 16 forms and has the large-diameter portion 172 bigger than the diameter of guidewire body part 171.
Again, the variation of Figure 17 (a)～(d) expression the 2nd current supply line 114b.That is, in the 2nd current supply line 114b shown in this Figure 17 (a), utilize etching processing or electroplating processes methods such as (built-up welding) to form rough surface portion 181 end that is embedded in the sealing 2b, in the 2nd current supply line 114b shown in Figure 17 (b), utilization is cut leading section or with its method such as injure, form irregular jog 182, form the kink 183 that front end is twisted and warped at the 2nd current supply line 114b shown in Figure 17 (c), and at the 2nd current supply line 114b shown in Figure 17 (d), front end is flattened, the plat part 184 that formation is wideer than conductor part.
Because leading section forms mooring parts such as large-diameter portion 172, rough surface portion 181, jog 182, kink 183 or plat part 184 on these the 2nd current supply lines 114b, when being embedded in the sealing 12b of glass tube 11, around the leading section that glassifying of fusion, even can not fully be adjacent to glass after the glass solidification, can prevent that also the direction of principal axis of the 2nd current supply line 114b from extracting.
Also have, the invention is not restricted to above-mentioned example, but various variations can be arranged in the scope that does not break away from purport of the present invention.For example and even the material of the material of the material of the material of glass tube, diameter, length, shape, outer electrode, shape, mooring means, internal electrode, shape, configuration, transparent resin rete or the kind of gas etc. can be carried out proper transformation according to the purposes user mode of fluorescent lamp.
Claims (13)
1. a fluorescent lamp is characterized in that, by
The two ends gas-tight seal, the inner glass tube of enclosing discharge medium, the luminescent coating that forms at this glass tube internal face, the end configuration in this glass tube, apply the internal electrode of a current potential and between the two ends of described glass tube along tubular axis with the pitch helical coil of regulation around lead constitute, the outer electrode that applies another current potential constitutes.
2. fluorescent lamp according to claim 1 is characterized in that, described discharge medium is made of the mist of xenon or xenon and other rare gas.
3. fluorescent lamp according to claim 2 is characterized in that, described outer electrode and described glass tube one are reinstated transparent resin film layer its peripheral surface that is covered, and with this described outer electrode are fixed on the described peripheral surface of described glass tube integrally.
4. fluorescent lamp, it is characterized in that, possess at internal face and form fluorophor by overlay film, two ends form sealing, the inner glass tube of enclosing discharge medium of glass tube, connect the 1st current supply line of the sealing of this glass tube one side airtightly, be connected in the internal electrode of the leading section in the described glass tube of extending to of this current supply line, one end is embedded in another sealing of described glass tube, the other end is drawn the 2nd outer current supply line of described glass tube, and along tube axial direction in the outer surface helical coil of described glass tube around, the outer electrode that end and described the 2nd current supply line are electrically connected and the conductor wire of mechanical fixation constitutes.
5. fluorescent lamp according to claim 4 is characterized in that, an end is embedded in the 2nd interior current supply line of another sealing of described glass tube, and expose in described glass tube inside its end.
6. fluorescent lamp according to claim 5 is characterized in that, the end coiling around described the 2nd current supply line that constitutes the conductor wire of described outer electrode is installed with.
7. fluorescent lamp according to claim 6, it is characterized in that, reel around described the 2nd current supply line and be installed with in the end that constitutes the conductor wire of described outer electrode, its coiling direction is identical with coiling direction at the conductor wire of the described outer electrode of formation of the peripheral surface of described glass tube.
8. fluorescent lamp according to claim 7 is characterized in that, the peripheral surface that comprises the glass tube of described outer electrode is covered with the transparent resin film layer, with this described outer electrode is fixed on the peripheral surface of described glass tube integrally.
9. fluorescent lamp according to claim 8 is characterized in that, interior described the 2nd current supply line of another sealing that an end is embedded in described glass tube forms the joint portion in its end.
10. fluorescent lamp according to claim 8 is characterized in that, described discharge medium is made of the gas that xenon or xenon and other rare gas mix.
11. fluorescent lamp, it is characterized in that, possesses the glass tube that two ends form sealing, the fluorophor that forms on this glass tube internal face is by overlay film, enclosed the discharge medium that comprises rare gas in the described glass tube, connect the sealing of described glass tube one side, and the 1st current supply line of gas-tight seal, be arranged at the internal electrode of the leading section of the 1st current supply line, one end is embedded in another sealing of described glass tube, the other end is drawn the 2nd outer current supply line of described glass tube, be formed at the determining positions portion of the peripheral surface of described glass tube, and be directed into this determining positions portion, along tube axial direction on the almost whole length of described glass tube in its peripheral surface helical coil around, the outer electrode of the conductor wire formation that is connected and fixed of an end and described the 2nd current supply line simultaneously.
12. fluorescent lamp according to claim 11 is characterized in that, the peripheral surface that comprises the glass tube of described outer electrode is covered with the transparent resin rete, with this described outer electrode is fixed on the peripheral surface of described glass tube integrally.
13. fluorescent lamp according to claim 12 is characterized in that, described discharge medium is made of the mist of xenon or xenon and other rare gas.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26923499A JP2001093476A (en) | 1999-09-22 | 1999-09-22 | Fluorescent lamp |
| JP269234/1999 | 1999-09-22 | ||
| JP36328699 | 1999-12-21 | ||
| JP363286/1999 | 1999-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1322373A true CN1322373A (en) | 2001-11-14 |
Family
ID=26548680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00801998A Pending CN1322373A (en) | 1999-09-22 | 2000-09-22 | Fluorescent lamp |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1146544A4 (en) |
| KR (1) | KR20010079891A (en) |
| CN (1) | CN1322373A (en) |
| TW (1) | TW476092B (en) |
| WO (1) | WO2001022473A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100380571C (en) * | 2002-04-19 | 2008-04-09 | 松下照相·照明株式会社 | Discharge light and back light |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW558732B (en) | 2001-09-19 | 2003-10-21 | Matsushita Electric Ind Co Ltd | Light source apparatus and liquid crystal display apparatus using the same |
| US6891334B2 (en) | 2001-09-19 | 2005-05-10 | Matsushita Electric Industrial Co., Ltd. | Light source device and liquid crystal display employing the same |
| US6946794B2 (en) | 2001-11-22 | 2005-09-20 | Matsushita Electric Industrial Co., Ltd. | Light source device and image reader |
| US6806648B2 (en) | 2001-11-22 | 2004-10-19 | Matsushita Electric Industrial Co., Ltd. | Light source device and liquid crystal display device |
| US6906461B2 (en) | 2001-12-28 | 2005-06-14 | Matsushita Electric Industrial Co., Ltd. | Light source device with inner and outer electrodes and liquid crystal display device |
| JP2006079830A (en) * | 2002-09-27 | 2006-03-23 | Matsushita Electric Ind Co Ltd | Discharge lamp lighting device |
| JP2006147524A (en) * | 2004-08-25 | 2006-06-08 | Harison Toshiba Lighting Corp | Discharge lamp tube, its manufacturing method and dielectric barrier discharge lamp |
| DE102013103807A1 (en) * | 2013-04-16 | 2014-10-16 | Dritte Patentportfolio Beteiligungsgesellschaft Mbh & Co.Kg | RF lamp with buried electrode |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03245452A (en) * | 1990-02-21 | 1991-11-01 | Toshiba Lighting & Technol Corp | Fluorescent lamp for indicator |
| JP3211548B2 (en) * | 1994-03-30 | 2001-09-25 | ウシオ電機株式会社 | Dielectric barrier discharge fluorescent lamp |
| JPH08152406A (en) * | 1994-11-29 | 1996-06-11 | Shimadzu Corp | Fluorescence analyzer |
| JPH1173926A (en) * | 1997-07-03 | 1999-03-16 | Tokai Rubber Ind Ltd | Film electrode, manufacture and manufacturing device thereof, and electrodeless lamp using the same |
-
2000
- 2000-09-22 TW TW089119683A patent/TW476092B/en not_active IP Right Cessation
- 2000-09-22 EP EP00961176A patent/EP1146544A4/en not_active Withdrawn
- 2000-09-22 WO PCT/JP2000/006491 patent/WO2001022473A1/en not_active Application Discontinuation
- 2000-09-22 KR KR1020017003645A patent/KR20010079891A/en not_active Application Discontinuation
- 2000-09-22 CN CN00801998A patent/CN1322373A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100380571C (en) * | 2002-04-19 | 2008-04-09 | 松下照相·照明株式会社 | Discharge light and back light |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010079891A (en) | 2001-08-22 |
| EP1146544A1 (en) | 2001-10-17 |
| TW476092B (en) | 2002-02-11 |
| WO2001022473A1 (en) | 2001-03-29 |
| EP1146544A4 (en) | 2004-06-23 |
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