CN101681752A - Cold cathode fluorescent lamp, backlight unit, and liquid crystal display device - Google Patents

Cold cathode fluorescent lamp, backlight unit, and liquid crystal display device Download PDF

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Publication number
CN101681752A
CN101681752A CN200980000052A CN200980000052A CN101681752A CN 101681752 A CN101681752 A CN 101681752A CN 200980000052 A CN200980000052 A CN 200980000052A CN 200980000052 A CN200980000052 A CN 200980000052A CN 101681752 A CN101681752 A CN 101681752A
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CN
China
Prior art keywords
lead
cold
cathode fluorescence
wire
glass bulb
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Pending
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CN200980000052A
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Chinese (zh)
Inventor
栗山健佑
马庭隆司
小野泰藏
芦田美奈
森裕介
胁村丰
出岛尚
高崎晃史
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of CN101681752A publication Critical patent/CN101681752A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/52—Means forming part of the tube or lamps for the purpose of providing electrical connection to it directly applied to or forming part of the vessel
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133604—Direct backlight with lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/02—Single-pole devices, e.g. holder for supporting one end of a tubular incandescent or neon lamp
    • 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

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

Provided is a cold cathode fluorescent lamp including: a glass bulb (10); a hollow electrode (20) set inside the both end portions of the glass bulb (10); and a power feed terminal (30) arranged outside the both end portions of the glass bulb (10) and connected to a lead line (22) of the hollow electrode (20). The power feed terminal (30) has a conductive tube (31) arranged in abutment with the external circumferential surface of the glass bulb (10). The tube (31) is not in contact with any external circumferential area (e) of the glass bulb (10) opposing to the lead line (22) at least in theglass bulb (10). Thus, the lamp can easily be installed and can have a long service life with a sufficient lamp luminance.

Description

Cold-cathode fluorescence lamp, backlight unit and liquid crystal indicator
Technical field
The present invention relates to cold-cathode fluorescence lamp, backlight unit and liquid crystal indicator, particularly relate to cold-cathode fluorescence lamp with the current feed terminal that is disposed at glass bulb end outer peripheral face etc.
Background technology
The cold-cathode fluorescence lamp 600,700 of the current feed terminal 602,702 of gap-like just was set just like Figure 41 and the both ends at glass bulb 601,701 as shown in Figure 42 in the past.
Cold-cathode fluorescence lamp 600 shown in Figure 41, be under the state that the lead-in wire 604 that is connected in bar-shaped electrode 603 is turned back along the end of the glass bulb 601 of tubulose, the low-melting glass 602a that lead-in wire 604 is also covered together are set in described end and comprise this low-melting glass 602a, surround the fluorescent lamp (patent documentation 1) of the current feed terminal 802 that the metallic lamp holder 602c of outer peripheral face of the end 601a of glass bulb 601 constitutes across soft metal 602b.
Again, cold-cathode fluorescence lamp 700 shown in Figure 42 possess cylindrical shell 702a on the end outer peripheral face that is arranged at glass bulb 701, from the end 702b of cylindrical shell 702a to the leading-out portion 702c of the extended band shape in the direction of principal axis outside of cylindrical shell 702a and the current feed terminal 702 that constitutes from the connecting portion 702d that the front end of leading-out portion 702c is bent to form.Again, extend derivation lead-in wire 704 from the end of glass bulb 701 and be disposed in the through hole of connecting portion 702d, this through hole and lead-in wire 704 are welded with braze 705.What be formed at cylindrical shell 702a again, is being held in the end 707 (patent documentation 2) of glass bulb 701 to the outstanding bead 706 of radially inner side with following of the outer peripheral face state of contact of glass bulb 701.
The current feed terminal 802,702 of Figure 41, structure shown in Figure 42 and the lead-in wire 604,704 of electrode 603,703 are electrically connected, therefore if the end of cold-cathode fluorescence lamp 600,700 is embedded in the socket (not shown) of ignition device of backlight unit etc., just cold-cathode fluorescence lamp 600,700 can be fixed in above-mentioned ignition device, and the lamp circuit of cold-cathode fluorescence lamp 600,700 and above-mentioned ignition device can be electrically connected.Therefore, when cold-cathode fluorescence lamp 600,700 is installed on ignition device, needn't 604,704 carry out soldering etc. to going between, compare with the cold-cathode fluorescence lamp that current feed terminal 802,702 is not set, installation is more prone to.
Patent documentation 1: Japanese kokai publication hei 7-220622 communique
Patent documentation 2: TOHKEMY 2007-234551 communique
But in the cold-cathode fluorescence lamp 600 that possesses current feed terminal shown in Figure 41 802, in order to seek long lifetime, wish to adopt sputtering material to be not easy to be attached to coreless armature on the inner surface of glass bulb 601, if but adopt coreless armature, can reduce the problem of the brightness of lamp.It is the reasons are as follows.
Under electrode body 605 is bar-shaped situation, in Figure 41, as shown by arrows, on the whole outer surface of electrode body 605, discharge, the part of discharge is around to lead-in wire 604 1 sides, to go between 604 and near heat.Even therefore be connected in the heat sink effect that the current feed terminal 802 of lead-in wire 604 plays the temperature reduction that makes lead-in wire 604, described lead-in wire 604 and near temperature thereof can excessive descent yet.
But under the situation that adopts coreless armature, less generation discharge is around the situation to lead-in wire 604 1 sides, discharge make above-mentioned lead-in wire 604 and near situation about being heated also few, therefore because the thermolysis of current feed terminal 802 makes lead-in wire 604 and near temperature thereof low excessively.Consequently, mercury vapour is gathered in around the lead-in wire 604 in a large number, and the brightness decline of lamp, the slow situation of brightness rising of lamp take place mercury vapour deficiency on the discharge road.
On the other hand, in the cold-cathode fluorescence lamp 700 that possesses current feed terminal shown in Figure 42 702, the bead 706 that current feed terminal 702 is set to be formed at cylindrical shell 702a contacts at least with the part of outer peripheral face Zone Full ε of lead-in wire 704 opposed glass bulbs 701 in the glass bulb 701, therefore be somebody's turn to do the temperature step-down on the surface of the glass bulb 701 that contacts, mercury vapour is gathered in this contact site in a large number and goes between around 704, the brightness decline of lamp, the slow situation of brightness rising of lamp take place in mercury vapour deficiency on the discharge road.Particularly glass bulb 701 uses under the situation of soda-lime glass material, the react mercury alloy of generation of the sodium that focuses on mercury vapour that above-mentioned contact site comes and glass bulb 701 inner surfaces in a large number is created on glass bulb 701 inner surfaces, consequently, mercury vapour deficiency in the glass bulb, the brightness of lamp further descends.
Summary of the invention
The present invention makes in view of above-mentioned problem, and its purpose is, provide install simple and also the life-span long, and have the cold-cathode fluorescence lamp of enough brightness.
In order to solve above-mentioned existing problems, the cold-cathode fluorescence lamp of technical scheme 1 of the present invention, it is characterized in that, possess glass bulb, be arranged at the coreless armature of inboard at described glass bulb both ends and the outside that is arranged at described glass bulb both ends respectively, the current feed terminal that is connected with the lead-in wire of described coreless armature, described current feed terminal has the conductivity cylindrical body that the outer peripheral face that surrounds described glass bulb is provided with, described cylindrical body at least with described glass bulb in the whole outer peripheral face of the opposed described glass bulb of lead-in wire on roughly be not in contact with it.
Technical scheme 2 described cold-cathode fluorescence lamps of the present invention is characterized in that the inner surface of described cylindrical body is close to the outer peripheral face with the opposed glass bulb of described coreless armature.
Technical scheme 3 described cold-cathode fluorescence lamps of the present invention is characterized in that, described cylindrical body has the 1st portion and extends the 2nd portion that is provided with from the 1st portion to cylindrical body axis direction lead-in wire side, and the 2nd portion's external diameter is bigger than described the 1st portion's external diameter.
Technical scheme 4 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described cylindrical body has the 1st portion and extends a pair of the 2nd portion that is provided with from the 1st portion to cylindrical body axis direction both sides, and this a pair of the 2nd portion's external diameter is bigger than described the 1st portion's external diameter respectively.
Technical scheme 5 described cold-cathode fluorescence lamps of the present invention is characterized in that described cylindrical body has slit portion on its axis direction, and section is roughly " C " font.
Technical scheme 6 described cold-cathode fluorescence lamps of the present invention is characterized in that, are provided with to cross over a pair of holding section that described slit portion engages mutually on the part separately of the opposed a pair of ora terminalis of described slit portion that clips described current feed terminal.
Technical scheme 7 described cold-cathode fluorescence lamps of the present invention is characterized in that, a pair of holding section of described cylindrical body forms recess at an opposed side's of described slit portion ora terminalis, at the opposing party's ora terminalis formation protuberance.
Technical scheme 8 described cold-cathode fluorescence lamps of the present invention is characterized in that, described cylindrical body at least the end of the opposition side of the lead-in wire side of its axis direction inner surface chamfering (bevel) or form horn-like.
Technical scheme 9 described cold-cathode fluorescence lamps of the present invention is characterized in that, described cylindrical body has a plurality of elastic tongue pieces that are provided with along circumferencial direction, clip the outer peripheral face of described glass bulb by means of these a plurality of elastic tongue pieces.
Technical scheme 10 described cold-cathode fluorescence lamps of the present invention is characterized in that the leading section of described elastic tongue piece expands into horn-like.
Technical scheme 11 described cold-cathode fluorescence lamps of the present invention is characterized in that described cylindrical body forms by being wound as spiral helicine metal material.
Technical scheme 12 described cold-cathode fluorescence lamps of the present invention is characterized in that, described cylindrical body is formed by wire or the banded elastomeric material axis direction near cylindrical body.
Technical scheme 13 described cold-cathode fluorescence lamps of the present invention, it is characterized in that it is that the metal of the conducting film that forms of the material of copper or silver and the minimal thickness that is provided with across this conducting film constitutes that described cylindrical body is used on the outer peripheral face of described glass bulb with braze or principal component.
Technical scheme 14 described cold-cathode fluorescence lamps of the present invention is characterized in that, described cylindrical body and the discontiguous part of described glass bulb outer peripheral face do not form described conducting film.
Technical scheme 15 described cold-cathode fluorescence lamps of the present invention is characterized in that only the part of the inner surface of described cylindrical body contacts with the outer peripheral face of described glass bulb.
Technical scheme 16 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described cylindrical body surface within it has to radially inner side outstanding, push with described glass bulb in the outer surface Zone Full of the opposed described glass bulb of lead-in wire beyond the outer peripheral face of described glass bulb, be held in the support member of described glass bulb.
Technical scheme 17 described cold-cathode fluorescence lamps of the present invention is characterized in that, described support member is the part bending of described cylindrical body, and the part of this bending presses on the member of the outer peripheral face of described glass bulb.
Technical scheme 18 described cold-cathode fluorescence lamps of the present invention is characterized in that, described support member is distolateral to another distolateral extension from described cylindrical body, simultaneously from the described one distolateral a plurality of shoestring that form to described glass bulb one lateral buckling.
Technical scheme 19 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described support member is the part bending of described cylindrical body, and the part of this bending constitutes by side-prominent a plurality of dowel pins (ダ ボ) nail of member on the outer peripheral face that is pressed in described glass bulb and the outer peripheral face to described glass bulb that is formed at described cylindrical body inner surface.
Technical scheme 20 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described lead-in wire has the accumulation portion bigger than the part external diameter that is packaged in described glass bulb with described current feed terminal engaging portion, and at least a portion of described accumulation portion is formed by nickel material, iron material or nickel plating material.
Technical scheme 21 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described lead-in wire is to be formed and to be engaged the outside lead of described current feed terminal by nickel material, iron material or nickel plating material and to be made of and the inner lead that engages described coreless armature engages and to form the material that is different from this outside lead, to have the accumulation portion bigger than described lead-in wire external diameter at described junction surface.
Technical scheme 22 described cold-cathode fluorescence lamps of the present invention is characterized in that, its bottom surface is close in the end of described glass bulb by described accumulation portion, or the member of being close to its bottom surface and upwards keeping the gap to bury underground in the footpath of described lead-in wire.
Technical scheme 23 described cold-cathode fluorescence lamps of the present invention is characterized in that, keep the gap between the end of described accumulation portion and described glass bulb.
Technical scheme 24 described cold-cathode fluorescence lamps of the present invention is characterized in that described gap is 0.1mm～0.5mm.
Technical scheme 25 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described accumulation portion with axle center described lead-in wire cross section orthogonal be circular, its maximum gauge is bigger than the maximum outside diameter of described lead-in wire, than the little size of the maximum outside diameter of described glass bulb.
Technical scheme 26 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described lead-in wire is to engage with the inner lead that is made of the material that is different from this outside lead and be connected described coreless armature and form being formed by nickel material, iron material or nickel plating material and connecting the outside lead of described current feed terminal, have the accumulation portion bigger at described junction surface, and the pyroconductivity of the described inner lead of thermal conductivity ratio of described outside lead is little than described lead-in wire external diameter.
Technical scheme 27 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described lead-in wire is to engage with the inner lead that is made of the material that is different from this outside lead and be connected described coreless armature and form being formed by nickel material, iron material or nickel plating material and connecting the outside lead of described current feed terminal, described outside lead line footpath is thinner than described inner lead line footpath, and the pyroconductivity of the described inner lead of thermal conductivity ratio of described outside lead is little.
Technical scheme 28 described cold-cathode fluorescence lamps of the present invention is characterized in that the surface roughness of the part that is packaged in described glass bulb at least of described lead-in wire is 0.2Ra～0.8Ra.
Technical scheme 29 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, one end of described lead-in wire and the welding of described coreless armature are fixing, the surface of this end is 0.2Ra～0.8Ra, and the radical length of chamfering (bevel) size is 0.08mm～0.15mm, and axial length is 0.1mm～0.25mm.
Technical scheme 30 described cold-cathode fluorescence lamps of the present invention is characterized in that, described current feed terminal possesses from described cylindrical body to the extension of cylindrical body axis direction lead-in wire side, the connecting portion that is connected with the part of described lead-in wire.
Technical scheme 31 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described current feed terminal is the terminal that its described cylindrical body inserts in the end periphery of described glass bulb outward, have banded leading-out portion that extends laterally from cylindrical body axis direction one end of described cylindrical body and the leading section that is arranged at this leading-out portion, the connecting portion that is connected with the part of described lead-in wire.
Technical scheme 32 described cold-cathode fluorescence lamps of the present invention is characterized in that the described lead-in wire pyroconductivity of described connecting portion thermal conductivity ratio is big.
Technical scheme 33 described cold-cathode fluorescence lamps of the present invention is characterized in that, the connecting portion of described cylindrical body, and its pyroconductivity is 75W/ (mK)～435W/ (mK), and conductivity is 9 * 10 6S/m～65 * 10 6S/m.
Technical scheme 34 described cold-cathode fluorescence lamps of the present invention is characterized in that, described connecting portion forms U font portion near a part of outer peripheral face of described lead-in wire, and described U font portion is connected with described lead-in wire by ca(u)lk.
Technical scheme 35 described cold-cathode fluorescence lamps of the present invention is characterized in that a part of outer peripheral face of described connecting portion and described lead-in wire is approaching, it is surrounded ground form cylindrical portion, and the part of described cylindrical portion is connected with described lead-in wire by ca(u)lk.
Technical scheme 36 described cold-cathode fluorescence lamps of the present invention is characterized in that, a part of outer peripheral face that described connecting portion clips described lead-in wire begins to be bent to form from the front end of described leading-out portion.
Technical scheme 37 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described connecting portion has a pair of sheet of seizing on both sides by the arms of the outer peripheral face that clips described lead-in wire, so that the described a pair of sheet of seizing on both sides by the arms is at least state more than the 100g to the pressing force of described lead-in wire separately, seizes described lead-in wire on both sides by the arms and connects.
Technical scheme 38 described cold-cathode fluorescence lamps of the present invention is characterized in that, described connecting portion is with the part bending more forward than the extended front end of described leading-out portion, forms to contact with an end face formation face of described lead-in wire.
Technical scheme 39 described cold-cathode fluorescence lamps of the present invention is characterized in that, described connecting portion is with the part bending more forward than the front end of described leading-out portion, forms contiguously with a part of outer peripheral face with described lead-in wire.
Technical scheme 40 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described connecting portion is to have the joint face that forms through hole or notch, insert described lead-in wire ground at described through hole or notch, the member that will the part more forward be bent to form than the front end of described leading-out portion, insert described lead-in wire at described through hole or notch, described joint face is connected by soft metal with described lead-in wire.
Technical scheme 41 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described lead-in wire has the accumulation portion bigger than the part external diameter that is packaged in described glass bulb with described current feed terminal engaging portion, at least a portion of described accumulation portion is formed by nickel material, iron material or nickel plating material, and its part of described connecting portion and described accumulation portion contact.
Technical scheme 42 described cold-cathode fluorescence lamps of the present invention, it is characterized in that, described lead-in wire is to engage with the inner lead that is made of the material that is different from this outside lead and be connected described coreless armature and form being formed by nickel material, iron material or nickel plating material and connecting the outside lead of described current feed terminal, have the accumulation portion bigger than described inner lead external diameter at described junction surface, its part of described connecting portion and described accumulation portion contact.
Technical scheme 43 described cold-cathode fluorescence lamps of the present invention is characterized in that, described connecting portion also utilizes welding or soft metal to be connected with a part of outer peripheral face of described lead-in wire.
Technical scheme 44 described cold-cathode fluorescence lamps of the present invention is characterized in that, described glass bulb sodium oxide content is that the glass material of 3 weight %～20 weight % scopes forms.
Technical scheme 45 described cold-cathode fluorescence lamps of the present invention is characterized in that, described glass bulb sodium oxide content is that the glass material of 5 weight %～20 weight % scopes forms.
Technical scheme 46 described backlight units of the present invention is characterized in that, carry technical scheme 1 described cold-cathode fluorescence lamp as light source.
Technical scheme 47 described liquid crystal indicators of the present invention, it is characterized in that, possess display panels and technical scheme 46 described backlight units, described backlight unit has the peripheral device that holds many technical schemes 1 described cold-cathode fluorescence lamp, and described peripheral device is disposed at the back side of described display panels.
If adopt the cold-cathode fluorescence lamp of technical scheme 1 of the present invention, the cylindrical body of current feed terminal at least with described glass bulb in the whole outer peripheral face of the opposed described glass bulb of lead-in wire on roughly be not in contact with it, therefore compare with the contact area of cylindrical body, thermolysis is little.That is to say that the temperature of the periphery that goes between is not easy to reduce, and is not easy to assemble mercury vapour around the described lead-in wire, therefore is not easy to take place mercury vapour deficiency on the discharge path, cold-cathode fluorescence lamp brightness is low, the slow phenomenon of brightness rising of lamp.Consequently, can prolong useful life of lamp and can make lamp that enough brightness is arranged.
If adopt technical scheme 2 described cold-cathode fluorescence lamps of the present invention, the inner surface of cylindrical body is close to the outer peripheral face with the opposed glass bulb of coreless armature, thus mercury its be gathered in around the coreless armature easily, consequently, more difficult gathering mercury vapour around the described lead-in wire, so mercury vapour deficiency on the more difficult generation discharge path, cold-cathode fluorescence lamp brightness is low, the slow phenomenon of brightness rising of lamp.
If adopt technical scheme 3 described cold-cathode fluorescence lamps of the present invention, have than the 1st the 2nd portion that portion's external diameter is big, therefore utilize the step difference of the 1st portion and the 2nd portion on the tube axial direction of lamp, to locate easily.
If adopt technical scheme 4 described cold-cathode fluorescence lamps of the present invention, have than the 1st the 2nd portion that portion's external diameter is big in the cylindrical body axis direction both sides of the 1st portion, therefore utilize the step difference of the 1st portion and the 2nd portion on the tube axial direction of lamp, to locate easily.And the skew of lamp on tube axial direction behind the both direction restriction location of the step difference that can utilize two places from the tube axial direction, therefore make the surface of the 1st cylindrical portion of cylindrical body be not easy to make damage.
If adopt technical scheme 5 described cold-cathode fluorescence lamps of the present invention, the cylindrical body of current feed terminal has slit portion at its axis direction, section is roughly " C " font, therefore the overall dimension tolerance of glass bulb can be absorbed it by means of the elastic force of the part that roughly forms " C " font, current feed terminal can be propped up the outer peripheral face that is held in glass bulb.
If adopt technical scheme 6 described cold-cathode fluorescence lamps of the present invention, cross over a pair of holding section that described slit portion engages mutually clipping to be provided with on the part separately of the opposed a pair of ora terminalis of slit portion, can make the dimensionally stable of cylindrical body like this.
If adopt technical scheme 7 described cold-cathode fluorescence lamps of the present invention, the recess that forms at the opposed side's of slit portion ora terminalis and constitute a pair of holding section at the protuberance that the opposing party's ora terminalis forms, can make cylindrical body stable like this, and overall dimension tolerance that can the heat absorbing glass bulb.
If adopt technical scheme 8 described cold-cathode fluorescence lamps of the present invention, the inner surface chamfering (bevel) of the end of the opposition side of the lead-in wire side of the axis direction of cylindrical body or form horn-like, by means of this, can avoid the damage on glass bulb surface when current feed terminal is inserted glass bulb, and can easily current feed terminal be installed on glass bulb.
If adopt technical scheme 9 described cold-cathode fluorescence lamps of the present invention, circumferencial direction along the cylindrical body of current feed terminal is provided with a plurality of elastic tongue pieces, clip the outer peripheral face of glass bulb by means of these a plurality of elastic tongue pieces, make the load that applies on the whole outer peripheral face of cylindrical body evenly distribute, therefore can prevent that glass bulb from breaking.And, make that the current feed terminal after installing is not easy to move on its tubular axis with respect to glass bulb more on glass bulb because cylindrical body inner surface and glass bulb outer peripheral face are close to better mutually.
If adopt technical scheme 10 described cold-cathode fluorescence lamps of the present invention, the leading section of elastic tongue piece expands into horn-like, therefore can successfully current feed terminal be installed on the glass bulb end.
If adopt technical scheme 11 described cold-cathode fluorescence lamps of the present invention, the cylindrical body of current feed terminal forms by being wound as spiral helicine metal material, make the load that applies on the whole outer peripheral face of cylindrical body evenly distribute, therefore can prevent that glass bulb from breaking.And because cylindrical body inner surface and glass bulb outer peripheral face are close to better mutually, the current feed terminal after therefore installing on glass bulb is not easy to move on its tubular axis with respect to glass bulb more.And easily cylindrical body is installed on the end of glass bulb, even and on the glass bulb of different externals diameter of pipe, also can install.
If adopt technical scheme 12 described cold-cathode fluorescence lamps of the present invention, being wound into spiral helicine cylindrical body is formed by wire or banded elastomeric material, therefore can enough research book figures become cylindrical body, compare with the situation of metallic plate being carried out punch process, not generating material loss can less material unaccounted-for (MUF).And since wire or banded elastomeric material near the axis direction of cylindrical body, so cylindrical body is not easy to collapse.
If adopt technical scheme 13 described cold-cathode fluorescence lamps of the present invention, therefore the conducting film that cylindrical body is formed by for example dipping method and constitute across the metal of the minimal thickness of the tubular of this conducting film setting can provide current feed terminal simple in structure.
If adopt technical scheme 14 described cold-cathode fluorescence lamps of the present invention, cylindrical body and the discontiguous part of glass bulb outer peripheral face do not form conducting film, can reduce the use amount of conducting film with this, and the heat radiation of the part around can suppressing to go between.
If adopt technical scheme 15 described cold-cathode fluorescence lamps of the present invention, can suppress the mercury aggegation identical with the existing cold-cathode fluorescence lamp that does not have current feed terminal.
If adopt technical scheme 16 described cold-cathode fluorescence lamps of the present invention, since have push with glass bulb in the opposed zone of lead-in wire beyond the outer peripheral face of glass bulb, prop up the support member that is held in glass bulb, therefore mercury vapour is not easy to be gathered in around the lead-in wire, be not easy to take place mercury vapour deficiency on the discharge path, the brightness of cold-cathode fluorescence lamp is low, the slow phenomenon of brightness rising of lamp.
If adopt technical scheme 17 described cold-cathode fluorescence lamps of the present invention, the support member of the part of cylindrical body bending is pressed on the outer peripheral face of glass bulb, therefore can under the equable state of the pressing force that strain causes, the end at glass bulb be installed by cylindrical body, and, also can reduce component number owing to constitute with a slice metallic plate.
If adopt technical scheme 18 described cold-cathode fluorescence lamps of the present invention, owing to be distolateral from cylindrical body to another distolateral extension, simultaneously from distolateral a plurality of shoestring that form to glass bulb one lateral buckling, easily cylindrical body is installed on the glass bulb end, even and on the glass bulb of different externals diameter of pipe, also can install.
If adopt technical scheme 19 described cold-cathode fluorescence lamps of the present invention, support member is that member and a plurality of dowel pin that the part by cylindrical body is bent to form constitutes, and therefore can constitute by enough a slice metallic plates, can reduce component number.And can enough a plurality of dowel pins maintain a certain distance with the glass bulb outer peripheral face, be held in for example outer peripheral face of glass bulb with the component elasticity twelve Earthly Branches that bend.
If adopt technical scheme 20 described cold-cathode fluorescence lamps of the present invention, form by nickel material, iron material or nickel plating material with the part of the lead-in wire of current feed terminal engaging portion, therefore under the situation of for example welding, can reliably current feed terminal be connected in lead-in wire with braze.
If adopt technical scheme 21 described cold-cathode fluorescence lamps of the present invention, lead-in wire is that outside lead that is formed by nickel material, iron material or nickel plating material and inner lead that material is different from the inner lead of encapsulation are engaged, the welding that has the accumulation portion bigger at the junction surface than the lead-in wire external diameter, therefore connect the easy soldering of outside lead of the part of current feed terminal, and can be enough accumulation portion enlarge and connect area, therefore can realize reliably and being connected of current feed terminal.
If adopt technical scheme 22 described cold-cathode fluorescence lamps of the present invention, owing to be to be close to accumulation portion bottom surface in the end of glass bulb, or be close to accumulation portion bottom surface and at the member that radially keeps the gap to bury underground of lead-in wire, therefore can prevent the leakage that the breakage of the lead packages part of glass bulb causes.That is to say, end at glass bulb, under the situation that the bottom surface of accumulation portion is close to, can suppress to put on the external impact of lead-in wire, and under the gapped diametrically situation in the bottom surface of accumulation portion, accumulation portion is not buried in the glass bulb end, can prevent that the thermal expansion of accumulation portion causes the situation of glass bulb end breakage to take place when the dip brazing material.
If adopt technical scheme 23 described cold-cathode fluorescence lamps of the present invention, between the end of accumulation portion and glass bulb the gap is set, therefore, can not apply thermal stress to the glass bulb end owing to the thermal expansion of accumulation portion when even lead-in wire is with the current feed terminal solder joints or lamp current lead-in wire accumulation portion heating when increasing yet.Consequently, can suppress the breakage of glass bulb end, prevent the generation of leaking.
If adopt technical scheme 24 described cold-cathode fluorescence lamps of the present invention, the gap is 0.1mm～0.5mm, therefore, even for example in advance under the situation of dip brazing material on the lead-in wire, on the lead-in wire of gap portion, can not adhere to braze yet, therefore can further suppress the breakage of glass bulb end, further prevent the generation of leaking.
If adopt technical scheme 25 described cold-cathode fluorescence lamps of the present invention, with the lead-in wire the axle center cross section orthogonal be the circle accumulation portion, its maximum gauge is the big size of maximum outside diameter than lead-in wire, therefore when ledge bumps against lead-in wire outside, the power that puts on accumulation portion is absorbed by the both ends of glass bulb, can prevent that therefore the glass bulb generation breakage that is encapsulating lead-in wire from causing leakage.Again because the maximum gauge of accumulation portion is littler than the maximum outside diameter of glass bulb, so lamp when installing accumulation portion be unlikely to be in the way.
If adopt technical scheme 26 described cold-cathode fluorescence lamps of the present invention, connect the easy soldering of outside lead of the part of current feed terminal, and can increase the connection area, therefore can realize reliably and being connected of current feed terminal.And the pyroconductivity of the thermal conductivity ratio inner lead of outside lead is little, therefore current feed terminal is being welded under the situation of outside lead with soldering (380 ℃) or welding methods such as (1455 ℃ of fusing points), heat is not easy from outside lead to the inner lead transmission, and it is damaged to prevent that therefore the glass bulb end from taking place.
If adopt technical scheme 27 described cold-cathode fluorescence lamps of the present invention, inner lead is engaged the lead-in wire that forms with the outside lead that is connected current feed terminal, because outside lead line footpath is thinner than inner lead line footpath, even therefore current feed terminal takes place to vibrate and also can be absorbed by thin outside lead, it is damaged to prevent that the glass bulb end from taking place.And because the pyroconductivity of the thermal conductivity ratio inner lead of outside lead is little, so heat is not easy from outside lead to the inner lead transmission, so it is damaged to prevent that the glass bulb end from taking place.
If adopt technical scheme 28 described cold-cathode fluorescence lamps of the present invention, the surface roughness of the part that is packaged in glass bulb of lead-in wire is 0.2Ra～0.8Ra, therefore even the connecting portion of current feed terminal is set or the lead-in wire of coreless armature vibrates, also owing to be packaged in the intensity big (improving 16%～40%) of encapsulation of lead-in wire of the part of glass bulb, so it is damaged to prevent that the glass bulb end from taking place with the following specific strength mutually of 0.1Ra.And because the intensity of the encapsulation of lead-in wire is big, so can prevent that at the glass bulb sealing lead-in wire taking place peels off.Consequently, can prevent to leak.
If adopt technical scheme 29 described cold-cathode fluorescence lamps of the present invention, the surface of one end of lead-in wire is 0.2Ra～0.8Ra, and the radical length of bevel size is 0.08mm～0.15mm, and axial length is 0.1mm～0.25mm, therefore can improve weld strength.That is to say, utilize methods such as sand-blast, cylinder grinding to make the surface of lead-in wire one end become matsurface, and form above-mentioned size, can suppress like this to go between surface of an end face diminishes, the scope that is stable at 0.2Ra～0.8Ra forms, by resistance welded or laser welding, can coreless armature and lead-in wire be welded with stable intensity.
If adopt technical scheme 30 described cold-cathode fluorescence lamps of the present invention, current feed terminal possesses from cylindrical body to the extension of the cylindrical body axis direction outside, the connecting portion that is connected with the part of lead-in wire, therefore can be with identical materials formation in aggregates, can reduce by a component number, improve the form accuracy of current feed terminal.Therefore can easily be installed on the glass bulb end.
If adopt technical scheme 31 described cold-cathode fluorescence lamps of the present invention, then have banded leading-out portion that extends laterally from cylindrical body axis direction one end of cylindrical body and the leading section that is arranged at this leading-out portion, the connecting portion that is connected with the part of described lead-in wire, therefore the bending force from banded leading-out portion of lead-in wire can be suppressed to put on, the leakage that the breakage of the glass bulb of package lead causes can be further prevented.
If adopt technical scheme 32 described cold-cathode fluorescence lamps of the present invention, connecting portion is bigger than the lead-in wire pyroconductivity, therefore when being fixed on the connecting portion of cylindrical body on the lead-in wire with soft metal such as braze, hard solder or methods such as laser welding, resistance welded, carry out heat that this welding takes place fixedly the time mainly in the heat radiation of cylindrical body one side, the heat that takes place in the time of therefore can suppressing to weld fixedly causes the situation generation of glass bulb breakage.
If adopt technical scheme 33 described cold-cathode fluorescence lamps of the present invention, the connecting portion of cylindrical body, its pyroconductivity is 75W/ (mK)～435W/ (mK), and conductivity is 9 * 10 6S/m～65 * 10 6S/m by means of this, can improve the connecting portion of cylindrical body and the welding performance and the electrical connection properties of lead-in wire.Also have, pyroconductivity is 75W/ (mK)～435W/ (mK), and conductivity is 9 * 10 6S/m～65 * 10 6The material of S/m for example has silver, and (pyroconductivity is that 429W/ (mK), conductivity are 63 * 10 6S/m), (pyroconductivity is that 401W/ (mK), conductivity are 59.6 * 10 to copper 6S/m), (pyroconductivity is that 317W/ (mK), conductivity are 45.2 * 10 to gold 6S/m), (pyroconductivity is that 237W/ (mK), conductivity are 37.7 * 10 to aluminium 6S/m), (pyroconductivity is that 80.2W/ (mK), conductivity are 9.93 * 10 to iron 6S/m), (pyroconductivity is that 90.7W/ (mK), conductivity are 14.3 * 10 to nickel 6S/m), (pyroconductivity is that 174W/ (mK), conductivity are 18.9 * 10 to tungsten 6S/m), (pyroconductivity is that 138W/ (mK), conductivity are 18.7 * 10 to molybdenum 6S/m) etc.
If adopt technical scheme 34 described cold-cathode fluorescence lamps of the present invention, connecting portion forms U font portion near the outer peripheral face of lead-in wire, the part of this U font portion is by ca(u)lk, be connected with lead-in wire, by means of this, when being riveted on U font portion on the lead-in wire, can suppress to put on the bending force on the lead-in wire, can realize stable being electrically connected of U font portion and lead-in wire, and can determine position on the axis direction of current feed terminal with respect to glass bulb.
If adopt technical scheme 35 described cold-cathode fluorescence lamps of the present invention, the outer peripheral face of connecting portion and lead-in wire is approaching, it is surrounded ground form cylindrical portion, the part of this cylindrical portion is connected with lead-in wire, by means of this by ca(u)lk, when being riveted on cylindrical portion on the lead-in wire, can suppress to put on the bending force on the lead-in wire, can realize stable being electrically connected of cylindrical portion and lead-in wire, and can determine position on the axis direction of current feed terminal with respect to glass bulb.
If adopt technical scheme 36 described cold-cathode fluorescence lamps of the present invention, the outer peripheral face that connecting portion clips lead-in wire begins to be bent to form from the front end of leading-out portion, just lead-in wire is not applied bending force ground, begin to be bent to form with the front end of the outer peripheral face that clips lead-in wire more than 2 from direction from leading-out portion perpendicular to the axle center, by means of this, can suppress to put on the power on the lead-in wire, realize being connected with lead-in wire simply.Consequently, can prevent the leakage that the breakage of part of the package lead of glass bulb causes.
If adopt technical scheme 37 described cold-cathode fluorescence lamps of the present invention, the a pair of sheet of seizing on both sides by the arms is at least more than the 100g the pressing force of lead-in wire separately, clips lead-in wire and connects, by means of this, can suppress to put on the bending force on the lead-in wire, realize stable being electrically connected with lead-in wire.
If adopt technical scheme 38 described cold-cathode fluorescence lamps of the present invention, the extended front end of ratio of one end face and the leading-out portion of the lead-in wire more part formation face of front contacts, therefore can suppress to put on the bending force on the lead-in wire, and can determine position on the axis direction of current feed terminal with respect to glass bulb.
If adopt technical scheme 39 described cold-cathode fluorescence lamps of the present invention, connecting portion is to begin to be bent to form with the mode that contact of outer peripheral face of the lead-in wire front end from leading-out portion, therefore can connecting portion and wire bonds to be fixed together by connection or the laser welding with soft metal enforcement.Particularly can implement simply to clip the resistance welded that two members weld with electrode, be effective method.And can determine position on the axis direction of current feed terminal with respect to glass bulb.
If adopt technical scheme 40 described cold-cathode fluorescence lamps of the present invention, through hole or notch at tabular connecting portion insert lead-in wire, connecting portion is connected by soft metal with lead-in wire, therefore can suppress to put on the bending force on the lead-in wire, can stably realize being electrically connected of connecting portion and lead-in wire by soft metal, and can determine position on the axis direction of cylindrical body with respect to glass bulb.
If adopt technical scheme 41 described cold-cathode fluorescence lamps of the present invention, the part of connecting portion is contacted with the accumulation portion of lead-in wire, by means of this, can determine position on the axis direction of current feed terminal with respect to glass bulb.And under the situation of welding, can suppress to put on the bending force on the lead-in wire with soft metal, can realize stable being electrically connected of the accumulation portion of the part of connecting portion and lead-in wire with bigger connection area.
If adopt technical scheme 42 described cold-cathode fluorescence lamps of the present invention, the part of connecting portion is contacted with the accumulation portion of lead-in wire, by means of this, can determine position on the axis direction of current feed terminal with respect to glass bulb.And under the situation of welding, can suppress to put on the bending force on the lead-in wire with soft metal, can realize the part of connecting portion and stable being electrically connected of the accumulation portion of lead-in wire with bigger connection area.
If adopt technical scheme 43 described cold-cathode fluorescence lamps of the present invention, also utilize welding or soft metal that connecting portion is connected with a part of outer peripheral face of lead-in wire, by means of this, can realize stable being electrically connected of connecting portion and lead-in wire.
If adopt technical scheme 44 described cold-cathode fluorescence lamps of the present invention, the glass bulb sodium oxide content is that the glass material of 3 weight %～20 weight % forms, and therefore can improve dark starting characteristic.And cylindrical body with glass bulb in the opposed glass bulb outer peripheral face of lead-in wire Zone Full be not in contact with it, therefore mercury vapour is not easy to assemble in the glass bulb that is surrounded by above-mentioned outer peripheral face Zone Full, therefore can suppress the formation of stripping in sodium (Na) with the mercury alloy of mercury vapour (Hg) reaction generation of glass bulb inner surface, the brightness that can suppress fluorescent lamp descends.
If adopt technical scheme 45 described cold-cathode fluorescence lamps of the present invention, the glass bulb sodium oxide content is that the glass material that 5 weight % are above, 20 weight % are following forms.Can be improved to below 1 second dark start-up time.
If adopt technical scheme 46 described backlight units of the present invention, carry technical scheme 1 described cold-cathode fluorescence lamp as light source, therefore the installation of above-mentioned lamp is simple, and can obtain the lamp of high brightness when realizing the long life.
If adopt technical scheme 47 described liquid crystal indicators of the present invention, technical scheme 46 described backlight units are disposed at the back side of display panels, therefore can obtain the lamp of high brightness when realizing the long life.
Description of drawings
Fig. 1 is the stereogram that the part of the cold-cathode fluorescence lamp of expression the present invention one example is cut.
Fig. 2 is the amplification profile of an end of this cold-cathode fluorescence lamp of expression.
Fig. 3 is the stereogram of tubular hardware of the current feed terminal of this cold-cathode fluorescence lamp of expression.
Fig. 4 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 1.
Fig. 5 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 2.
Fig. 6 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 3.
Fig. 7 is the stereogram of the film member of the expression current feed terminal that constitutes this cold-cathode fluorescence lamp.
Fig. 8 is the stereogram of an end of the cold-cathode fluorescence lamp of expression variation 4.
Fig. 9 is the amplification profile of an end of this cold-cathode fluorescence lamp of expression.
Figure 10 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 5.
Figure 11 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 6.
Figure 12 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 7.
Figure 13 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 8.
Figure 14 is the stereogram of current feed terminal of the cold-cathode fluorescence lamp of expression variation 9.
Figure 15 is the stereogram of current feed terminal of the cold-cathode fluorescence lamp of expression variation 10.
Figure 16 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 11.
Figure 17 is the stereogram of tubular hardware of the current feed terminal of this cold-cathode fluorescence lamp of expression.
Figure 18 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 12.
Figure 19 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 13.
Figure 20 represents the stereogram of tubular hardware of the current feed terminal of this cold-cathode fluorescence lamp.
Figure 21 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 14.
Figure 22 is the stereogram of an end of the cold-cathode fluorescence lamp of expression variation 15.
Figure 23 is the stereogram of an end of the cold-cathode fluorescence lamp of expression variation 16.
Figure 24 is the stereogram of an end of the cold-cathode fluorescence lamp of expression variation 17.
Figure 25 is the stereogram of current feed terminal of the cold-cathode fluorescence lamp of expression variation 18.
Figure 26 represents that this current feed terminal is installed on the state of cold-cathode fluorescence lamp front and back.
Figure 27 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 19.
Figure 28 is the stereogram of an end of the cold-cathode fluorescence lamp of expression variation 20.
Figure 29 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 20.
Figure 30 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 21.
Figure 31 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 22.
Figure 32 is expressed as the thermolysis of inquiring into current feed terminal of the present invention and the amplification profile of the cold-cathode fluorescence lamp of testing.
Figure 33 is expressed as to inquire into surface roughness Ra and peel off the correlation that intensity N takes place and the amplification profile of the cold-cathode fluorescence lamp that experimentizes.
Figure 34 is the key diagram of the assay method of surface roughness Ra.
Figure 35 is a key diagram of peeling off the assay method that intensity N takes place.
Figure 36 presentation surface roughness Ra and the measurement result of peeling off generation intensity N.
Figure 37 presentation surface roughness Ra and the dependency relation of peeling off generation intensity N.
Figure 38 is the exploded perspective view of the general structure of the backlight unit of expression the present invention one example etc.
Figure 39 is the key diagram of the installment state of explanation cold-cathode fluorescence lamp.
Figure 40 is the stereogram that the part of the liquid crystal indicator of expression the present invention one example is cut.
Figure 41 is the amplification profile of an end of cold-cathode fluorescence lamp of the band current feed terminal of expression prior art example.
Figure 42 is the amplification profile of an end of cold-cathode fluorescence lamp of another band current feed terminal of expression prior art example.
Symbol description
1 cold-cathode fluorescence lamp
10 glass bulbs
20 coreless armatures
22 lead-in wires
30 current feed terminals
31 cylindrical body
Embodiment
The explanation of cold-cathode fluorescence lamp
Cold-cathode fluorescence lamp to example 1 of the present invention describes with reference to the accompanying drawings.
Fig. 1 is the stereogram that the part of the cold-cathode fluorescence lamp of expression the invention process form 1 is cut, and Fig. 2 is the amplification profile of an end of expression cold-cathode fluorescence lamp.
Cold-cathode fluorescence lamp 1 adopts backlight unit as light source, possess glass bulb 10, be arranged at the coreless armature 20 of inboard at glass bulb both ends and the outside that is arranged at the glass bulb both ends, the current feed terminal 30 that is connected with the lead-in wire 22 of coreless armature 20 respectively.
Glass bulb 10 is pyrex (SiO 2-B 2O 3-Al 2O 3-K 2O-TiO 2) glass tube made processes total length 730mm.This glass bulb 10 comprise tubulose glass bulb main body 11, be positioned at a pair of encapsulation 12 of the length direction both sides of glass bulb main body 11.
Glass bulb main body 11 sections are circular, and external diameter is 4mm, and internal diameter is 3mm, and wall thickness is 0.5mm.Encapsulation 12, the length W on the tubular axis A of glass bulb 10 direction is 2mm as shown in Figure 2, is encapsulating coreless armature 20.
Also have, the structure of glass bulb 10 is not limited to structure recited above.But for length that cold-cathode fluorescence lamp 1 is done it thinly, wish the little and thin thickness of glass bulb 10 diameters, therefore usually preferably glass bulb main body 11 internal diameters be 1.4mm～6.0mm, thickness 0.2mm～0.5mm.
Form luminescent coating 13 on the inner surface except both ends of glass bulb 10.In this example, as shown in Figure 2, it is relative with the outer peripheral face of the electrode body 21 of coreless armature 20 that the end of luminescent coating 13 is set to, between the end of the pipe center side of the bottom 24 of electrode body 21 and current feed terminal 30.Utilize this structure, can prevent from directly to leak ultraviolet ray from glass bulb main body 11.
Luminescent coating 13 is by comprising for example red-emitting phosphors (Y 2O 3: Eu 3+), green-emitting phosphor (LaPO 4: Ce 3+, Tb 3+) and blue emitting phophor (BaMg 2Al 16O 27: Eu 2+) rare-earth phosphor form.Again, the mercury of for example about 1200 micrograms is enclosed and as the neon of about 8kPa (20 ℃) of rare gas and the mist of argon gas, ratio is neon 95mol%, argon gas 5mol% in the inside of glass bulb 10.
Also have, luminescent coating 13, mercury and rare gas are not limited to top described formation.For example also can comprise krypton gas in the rare gas.In this case, can suppress the infrared radiation of cold-cathode fluorescence lamp.And in the rare gas content of krypton gas preferably in the following scope of the above 5mol% of 0.5mol%.In this case, do not make modulating voltage have big change just can suppress the infrared radiation of cold-cathode fluorescence lamp.For example argon gas is more than 0mol%, in the following scope of 9.5mol%; Neon is more than 90mol%, in the scope below the 95mol%; Krypton gas is more than 0.5mol%, in the following scope of 5mol%.And comprise in the rare gas more than the krypton gas 0.5mol%, 3mol% is with next desirable more.Also have, comprise in the rare gas more than the krypton gas 1mol%, 3mol% also wants desirable with next.
Again, the material of glass bulb 10 uses pyrex, but is not limited thereto, and for example also can use the soda-lime glass that comprises sodium oxide molybdena etc.In this case, preferably between the inner surface of glass bulb 10 and luminescent coating 13, be provided for the diaphragm that prevents that mercury from combining with the sodium of glass bulb inner surface.Again, if consider to improve the processing characteristics and the dark starting characteristic of glass, then glass bulb 10 is the following glass materials of the above 20 weight % of 3 weight % with sodium oxide content preferably.If sodium oxide content is further brought up to more than the 5 weight %, then be about below 1 second the dark start-up time under dark condition.Otherwise, if sodium oxide content surpasses 20 weight %, can cause the glass bulb whitening when then using for a long time, cause briliancy to descend, or cause the generation of the unfavorable conditions such as intensity decreases of glass bulb 10 itself.And considering under the situation of Countermeasures of Environment Protection; in the scope of alkali-metal content more than above-mentioned 3 weight %, below the 20 weight %; and the glass material of lead content below 0.1 weight % be desirable (so-called " crown glass "), if the glass material of lead content below 0.01 weight % is then desirable more.Again, glass material also can have with oxide and is scaled SiO 2Contain 60 weight %～75 weight %, Al 2O 3Contain 1 weight %～5 weight %, Li 2O contains 0 weight %～5 weight %, K 2O contains 3 weight %～11 weight %, Na 2O contains 3 weight %～12 weight %, CaO and contains 0 weight %～9 weight %, MgO and contain 0 weight %～9 weight %, SrO and contain 0 weight %～12 weight %, BaO and contain the composition of 0 weight %～12 weight %.In this case, can provide lead-free, be beneficial to the cold-cathode fluorescence lamp of environmental protection.And better glass material is, has with oxide to be scaled SiO 2Contain 60 weight %～75 weight %, Al 2O 3Contain 1 weight %～5 weight %, B 2O 3Contain 0 weight %～3 weight %, Li 2O contains 0 weight %～5 weight %, K 2O contains 3 weight %～11 weight %, Na 2O contains 3 weight %～12 weight %, CaO and contains 0 weight %～9 weight %, MgO and contain 0 weight %～9 weight %, SrO and contain 0 weight %～12 weight %, BaO and contain the composition of 0 weight %～12 weight %.
Again, glass material also can have with oxide and is scaled SiO 2Contain 60 weight %～75 weight %, Al 2O 3Contain 1 weight %～5 weight %, Li 2O contains 0.5 weight %～5 weight %, K 2O contains 3 weight %～7 weight %, Na 2O contains 5 weight %～12 weight %, CaO and contains 1 weight %～7 weight %, MgO and contain 1 weight %～7 weight %, SrO and contain 0 weight %～5 weight %, BaO and contain the composition of 7 weight %～12 weight %.In this case, the handling ease of lamp is carried out, and can provide and do not conform to plumbously, is beneficial to the cold-cathode fluorescence lamp of environmental protection.
And glass material also can have with oxide and is scaled SiO 2Contain 65 weight %～75 weight %, Al 2O 3Contain 1 weight %～5 weight %, B 2O 3Contain 0 weight %～3 weight %, Li 2O contains 0.5 weight %～5 weight %, K 2O contains 3 weight %～7 weight %, Na 2O contains 5 weight %～12 weight %, CaO and contains 2 weight %～7 weight %, MgO and contain 2.1 weight %～7 weight %, SrO and contain 0 weight %～0.9 weight %, BaO and contain the composition of 7.1 weight %～12 weight %.In this case, not leaded and have the electrical insulation properties that is suitable for lighting use, and be not easy to lose transparent.And better glass material is, has with oxide to be scaled SiO 2Contain 65 weight %～75 weight %, Al 2O 3Contain 1 weight %～3 weight %, B 2O 3Contain 0 weight %～3 weight %, Li 2O contains 1 weight %～3 weight %, K 2O contains 3 weight %～6 weight %, Na 2O contains 7 weight %～10 weight %, CaO and contains 3 weight %～6 weight %, MgO and contain 3 weight %～6 weight %, SrO and contain 0 weight %～0.9 weight %, BaO and contain the composition of 7.1 weight %～10 weight %.
Coreless armature 20 is made of electrode body 21 and lead-in wire 22, is packaged in the encapsulation 12 of glass bulb 10.
Electrode body 21 nickel manufacturing constitutes bottom tube-like by tube portion 23 and bottom 24.Also have, electrode body 21 is not limited to that nickel (Ni) makes, and for example also can consider to make with iron-nickel alloy, Nb, Ta, Ti, Mo, W or Hf.
Tube portion 23 total lengths are 5.2mm, and external diameter is 2.7mm, and internal diameter is 2.3mm, wall thickness 0.2mm.Coreless armature 20 disposes to such an extent that make the tubular axis of a portion 23 roughly consistent with the tubular axis of glass bulb 10, and the interval between the inner surface of the outer peripheral face of tube portion 23 and glass bulb 10 is roughly even in the whole periphery of tube portion 23.And length M is 10mm.
Interval between the inner surface of the outer peripheral face of tube portion 23 and glass bulb 10 specifically is 0.15mm.When above-mentioned interval was narrow like this, discharge can not enter above-mentioned interval, only discharged in the inside of coreless armature 20.Thereby the sputtering material that disperses owing to discharge is not easy attached to glass bulb 10 inner surfaces, and cold-cathode fluorescence lamp 1 can be realized the long-life.On the other hand, discharge is not easy to spread to lead-in wire 22 1 sides, and therefore above-mentioned lead-in wire 22 is not easy to be heated by discharging.
Also have, the interval between the inner surface of the outer peripheral face of tube portion 23 and above-mentioned glass bulb 10 needn't be 0.15mm, but in order to make discharge can not enter above-mentioned interval, described interval is preferably below the 0.2mm.
On the surface of electrode body 21, also can form electron emission material layer (not shown).In this case, compare, can reduce modulating voltage with the lamp that the electron emission material layer is not set.Specifically, the electron emission material layer is formed at for example inner surface of electrode.The electron emission material layer comprises for example rare earth element.Because the effect that reduces modulating voltage is arranged in cold-cathode fluorescence lamp.And rare earth element preferably in lanthanum (La) and the yttrium (Y) at least any one.
It is desirable that the electron emission material layer also comprises more than in silicon (Si), aluminium (Al), zirconium (Zr), boron (B), zinc (Zn), bismuth (Bi), phosphorus (P) and the tin (Sn) any one.In this case, the effect that reduces modulating voltage is further continued.
And electronics emission effect property material layer also can comprise caesium (Cs) compound.In this case, can further improve the dark starting characteristic of lamp.Can cesium compound be attached on the inner surface or outer surface of electrode body 21 again.Also have, cesium compound preferably adopts more than in for example cesium sulfate, aluminic acid caesium, niobic acid caesium, wolframic acid caesium, cesium molybdate and the cesium chloride any.Again, cesium compound preferably is attached on the outer peripheral face of tube portion 23 of electrode.In this case, in the manufacturing process of cold-cathode fluorescence lamp, easily appropriateness makes the cesium compound activate.And it is then desirable more attached to the leading section of lamp central portion one side on the outer peripheral face of the tube portion 23 of electrode.
Lead-in wire 22 be inner lead 25 that thermal coefficient of expansion and glass bulb 10 roughly the same material of tungsten (W) are made with thinner than inner lead 25, and adhere to the outside lead 26 solder joints formation of the nickel system of braze etc. easily.The junction surface of lead-in wire 22 is being provided with littler than the external diameter of glass bulb 10, and the accumulation portion 27 bigger than the external diameter of inner lead 25, and making its both ends of the surface relative with glass bulb 10, its bottom closely contacts with the both ends of glass bulb 10.That is to say that outside lead 26 and accumulation portion 27 are positioned on more in the outer part the position than the outer surface of glass bulb 10.
By means of this structure, can make accumulation portion 27 be of a size of certain value to coreless armature 20, that is to say, can make gap between the inner surface of the bottom of coreless armature 20 and opposed glass bulb 10 (with the length of the cylindrical body axis direction of the Zone Full ε of the outer peripheral face of lead-in wire 22 opposed glass bulbs 10 in the glass bulb 10) little of about 1mm, effective length of illumination L extends.Therefore again, when the ledge of outside lead 26 touched the outside, the power that applies in accumulation portion 27 was absorbed by the both ends of glass bulb 10, can prevent to encapsulate the leakage that the damage of encapsulation 12 of the glass bulb 10 of inner lead 25 causes.Also have, accumulation portion 27 usefulness constitute with outside lead 26 identical materials nickel, but are not limited to this, for example also can consider with Fe-Ni alloy, Cu-Ni alloy or Dumet wire material etc.Again, the accumulation portion 27 of outside lead 26, it be a circle with lead-in wire axle center cross section orthogonal (with tubular axis A cross section orthogonal) of 22, its size preferably, its maximum gauge is bigger than the maximum gauge of inner lead 25, and is littler than the maximum outside diameter of glass bulb 10.But accumulation portion 27 not necessarily needs.
Inner lead 25 sections are roughly circle, and total length 3mm, line directly are 0.8mm.This inner lead 25, the end portion encloses of its outside lead 26 1 sides are in the encapsulation 12 of glass bulb 10, and the engaged at end of a side opposite with outside lead 26 1 sides is in the place of the lateral surface substantial middle of the bottom 24 of electrode body 21.
Outside lead 26 is ledges of giving prominence to tubular axis A direction from the outer surface of glass bulb 10, engages with current feed terminal 30.This outside lead 26 total length 1mm, the axle center of outside lead 26 is consistent haply with the tubular axis A of glass bulb 10.
The length σ of the tubular axis A direction of outside lead 26 is to be advisable below the 1mm.And the section of outside lead 26 is roughly circle, and line directly is the 0.6mm thinner than inner lead 25.
Length σ on the tubular axis A direction of outside lead 26 then runs into outside lead 26 if below the 1mm, makes outside lead 26 bendings, and the situation that causes encapsulation 12 to damage just is not easy to take place.For example when cold-cathode fluorescence lamp 1 is installed on backlight unit 1000 shown in Figure 38, just be not easy to take place outside lead 26 and run into backlight unit 1000, bend, or put on the situation that the stress on the outside lead 26 causes encapsulation 12 to break when running into.
The both ends that current feed terminal 30 for example is covered with glass bulb 10 are provided with.Specifically, have and contact with the outer peripheral face of glass bulb 10 and it is surrounded the conductivity cylindrical body 31 of setting, cylindrical body 31 has the noncontact portion (cylindrical body 31 of conductivity non-formation portion) of the outer peripheral face Zone Full ε that does not contact the glass bulb 10 relative with lead-in wire 22 in the glass bulb 10 at least.That is to say that cylindrical body 31 is 7.5mm by the length N that forms with braze on the outer peripheral face of glass bulb 10 (comprising the S of noncontact portion), thickness is that 50 microns film 32 and tubular hardware 33 constitutes.
Film 32 does not form at the Zone Full ε of the outer peripheral face of the glass bulb 10 relative with lead-in wire 22 in the glass bulb 10, and this place becomes the S of noncontact portion, and is littler than the contact area thermolysis of cylindrical body 31.Consequently, be not easy to assemble mercury vapour around the lead-in wire 22, be not easy to take place mercury vapour deficiency on the discharge road, the brightness of cold-cathode fluorescence lamp descends, or the brightness of the lamp slow phenomenon that rises.
Tubular hardware 33 is 6mm by for example length P, and thickness is that the little hardware of thickness that the stainless steel of 0.1mm is made forms.
Also have, conductive membrane 32 is not limited to braze, can be the material formation of copper or silver etc. with principal component also, and its thickness also needn't be limited especially, but descend and make easily and consider from the temperature at the both ends that suppress glass bulb 10, form 20～120 microns thickness.
Again, tubular hardware 33 is not limited to above-mentioned thickness and material, can be that the members such as titanium system, nickel system, cobalt system, molybdenum system, tungsten system of 0.1～0.5mm form with thickness also for example.
Again, the S of noncontact portion forms with following method for making.
This method for making is, by means of known infusion process (for example TOHKEMY 2004-146351 communique), promptly at first the part of wanting to form film 32 of glass bulb 10 is carried out blasting treatment or chemical treatment, make the surperficial chap of glass bulb 10 with this, the encapsulation 12 that will encapsulate the glass bulb 10 of coreless armature 20 thereafter impregnated in the braze of the fusion in the fusion tank, on the outer peripheral face of glass bulb 10, form the braze film 32 of conductivity with this in the zone of the necessity except the S of noncontact portion.At this moment, on the direction of tubular axis A, on the outer peripheral face at the both ends of glass bulb 10, form bonding part 32a, the S of noncontact portion and the film portion 32b that engages with outside lead 26 in regular turn.34 tubular hardware 33 with slit for example shown in Figure 3 then is set on the film 32 of bonding part 32a and film portion 32b, forms current feed terminal 30 with above-mentioned noncontact S of portion with these both ends at glass bulb 10.Also have, when encapsulation 12 be impregnated in the braze of fusion, also can apply ultrasonic wave.Such infusion process can form current feed terminal 30 simply, at an easy rate.
Bonding part 32a is current feed terminal 30 and lead-in wire 22 parts that are electrically connected, and it seems in appearance to be roughly cone shape.Therefore although the area of the outer surface of bonding part 32a covers the whole outer surface of outside lead 26 fully but is little.Therefore the exterior surface area of current feed terminal 30 is little, and thermolysis is also little, so 22 the temperature of going between is not easy to descend.And because outside lead 26 is covered fully by current feed terminal 30, so outside lead 26 bends, or outside lead 26 is subjected to stress, the possibility that encapsulation 12 is damaged is little.Also have, the exterior surface area of bonding part 32a is preferably as far as possible little.
Film portion 32b is on the outer surface of glass bulb 10, with be provided with in intimate contact with glass bulb 10 on the position of the outer peripheral face address of coreless armature 20 except the above-mentioned noncontact S of portion, therefore around coreless armature 20, assemble mercury vapour, consequently more difficult gathering mercury vapour around lead-in wire 22 easily.
Bonding part 32a forms with the mode that the inner surface of tubular hardware 33 engages with its peripheral end.With this tubular hardware 33 is connected with outside lead 26.
Also have, for the thermolysis that suppresses current feed terminal 30 in low-level, the zone that preferably forms tubular hardware 33 and film portion 32b is narrow as far as possible, the length N on the tubular axis A direction (cylindrical body axis direction) of current feed terminal 30 is preferably below the 19mm.Again, above-mentioned length N is than under the big situation of the length M of the leading section of central portion one side of the glass bulb main body 11 in the electrode body 21, and effectively length of illumination is short, if therefore consider the light beam loss that current feed terminal 30 causes, preferably described length N is littler than described length M, and is desirable more below the 10mm.And the film portion 32b of current feed terminal 30 also can utilize the method beyond the dipping method, and for example method such as evaporation, plating forms.
Above-mentioned cold-cathode fluorescence lamp 1 is with the some modulation frequency of 40～100kHz, the lamp current work of 3～25mA.Also have, lamp current arrives greatly under the situation of 25mA, considers effective length of illumination, and from reducing the consideration of sputter amount, in order to reduce the temperature of coreless armature 20, preferably for example the length N of current feed terminal 30 can reach 19mm, the total length of tube portion 23 can reach 15mm, does their length longly as far as possible.
According to example cold-cathode fluorescence lamp of the present invention is specified above, but cold-cathode fluorescence lamp of the present invention is not limited to above-mentioned example.For example cold-cathode fluorescence lamp is not limited to straight pipe type, also can be the cold-cathode fluorescence lamp of buckling shape such as U font, L font, C font for example.Again, the structure of current feed terminal 30 is not limited to said structure, for example also can consider to adopt the structure shown in the variation 1～4 of following explanation.Also have, in the accompanying drawing of following each variation, the part identical with above-mentioned current feed terminal 30 structures is marked with identical symbol, and omits its explanation.
Fig. 4 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 1.The current feed terminal 51 of cold-cathode fluorescence lamp 50 shown in Figure 4 is the members that are covered with the both ends formation cylindrical body of glass bulb 10.That is to say, cylindrical body is provided with the film 54 of bonding part 52 and film portion 53 formations, tubular hardware 55 with conductivity (member identical with the tubular hardware 33 of Fig. 3) is set, and tubular hardware 55 has the S of noncontact portion (conductivity cylindrical body non-formation portion) at least with on the outer peripheral face Zone Full ε of the interior lead-in wire 22 opposed glass bulbs 10 of glass bulb 10 on film 54.Again, lead-in wire 22 is members of accumulation portion 27 formation that welding nickel material is made on an end of the inner lead 25 that for example tungsten material forms.And bonding part 52 is roughly hemisphere, whole outer surfaces of the accumulation portion 27 of covering lead-in wire 22 in appearance.The thickness of this film and film portion 53 are similarly 50 microns.
If adopt this structure, utilize bonding part 52 to cover, cover accumulation portion 27 fully, the end of cold-cathode fluorescence lamp 50 forms slick and sly shape, even therefore the end and outside percussion mutually of cold-cathode fluorescence lamp 50 also are not easy to take place the situation that outside lead 26 bends or encapsulation 12 is damaged.
Also have, accumulation portion 27 usefulness nickel materials form, but be not limited to this, for example also can using after inner lead 25 identical materials with the tungsten material form an integral body, form part or all of surface of accumulation portions 27 with the nickel plating material that adheres to braze easily etc.
Fig. 5 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 2.The current feed terminal 61 of cold-cathode fluorescence lamp 60 shown in Figure 5 is the members that are covered with the both ends formation cylindrical body of glass bulb 10.That is to say, the film 64 that the cylindrical body setting is made of bonding part 62 and film portion 63 and be arranged at the tubular hardware 65 that conductivity is arranged on the film 64 (member identical) with the tubular hardware 33 of Fig. 3, and have the S of noncontact portion (conductivity cylindrical body non-formation portion) at the outer peripheral face Zone Full ε of the glass bulb 10 relative at least of tubular hardware 65 with lead-in wire 22 in the glass bulb 10.Again, lead-in wire 22 is to weld the member of the accumulation portion 27 of nickel material formation at a for example end of the inner lead 25 of tungsten material formation.And bonding part 62 outward appearances are roughly hemisphere, whole outer surfaces of the accumulation portion 27 of covering lead-in wire 22.And accumulation portion 27 buries underground in the end of glass bulb 10, and its bottom surface is closely contacted, and radially has a gap 12a at lead-in wire.Also have, at gap 12a, can with for example with film 64 identical materials fillings, also can be the cavity.And bonding part 62 usefulness films cover the outer surface of the accumulation portion 27 of lead-in wire 22.The thickness of this film and film portion 63 are similarly 50 microns.
If adopt this structure, because accumulation portion 27 is embedded in the end of glass bulb 10, accumulation portion 27 can not collide with the outside, and it is damaged to prevent that encapsulation 12 from taking place.And, can reduce the use amount of braze because whole current feed terminal 61 is formed film, can make cold-cathode fluorescence lamp 60 more at an easy rate.
Also have, in above-mentioned variation 2, whole accumulation portion 27 is covered by the end of glass bulb 10 fully, but is not limited to this, also can be that accumulation portion 27 is partly covered.That is to say that accumulation portion 27 is many more in the amount of burying of glass bulb 10 ends, then the probability with outside percussion is more little.
Fig. 6 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 3.Fig. 7 is the stereogram that expression constitutes the film member of current feed terminal.The both ends that the current feed terminal 71 of cold-cathode fluorescence lamp 70 shown in Figure 6 is covered with glass bulb 10 form cylindrical body.That is to say, cylindrical body is made of the bonding part 72 of the braze manufacturing tubular hardware 73 with the iron-nickel alloy manufacturing, and tubular hardware 73 at least with glass bulb 10 in the outer peripheral face Zone Full ε of lead-in wire 22 opposed glass bulbs 10 on have the S of noncontact portion (groove of formation concavity on tubular hardware 73 inner surfaces).And tubular hardware 73 is cylindrical shells that section roughly forms 150 microns of the wall thickness of C font, is embedded in the end of glass bulb 10 outward.The internal diameter of tubular hardware 73 is slightly littler than the external diameter of glass bulb 10, and on tubular hardware 73 slit shown in Figure 7 74 is set.Therefore, also can realize the design that the outer surface of the inner surface of tubular hardware 73 and above-mentioned glass bulb 10 is close to even this is some scale errors of existence between the external diameter of internal diameter and glass bulb 10 of tubular hardware 73.
Again, lead-in wire 22 is members that accumulation portion 27 that the end welding nickel material at the inner lead 25 of for example tungsten made constitutes obtains.And bonding part 72 outward appearances are roughly cylindrically, are covered with the whole outer surface of lead-in wire 22 accumulation portion 27.Also have, current feed terminal 71 needn't necessarily it constitutes with identical materials all.
Fig. 8 is the stereogram of current feed terminal of the cold-cathode fluorescence lamp of expression variation 4, and Fig. 9 is the profile of expression current feed terminal.
As Fig. 8 and shown in Figure 9, current feed terminal 81 has the cylindrical body 82 of the end periphery that inserts in glass bulb 10 outward and extends from cylindrical body 82, with the connecting portion 83 that the part of lead-in wire 22 is connected, be the member that corrosion resistant plate forms through pressure processing (sheet metal processing).
Cylindrical body 82 forms cylindric, have to radially inner side outstanding within it on the side face direction, push the outer peripheral face of the glass bulb 10 beyond the outer peripheral face Zone Full ε of the glass bulb 10 relative, be held in the support member of glass bulb 10 with the lead-in wire 22 of glass bulb 10 inside.
Specifically, support member is equally spaced on 3 local pipe clamp portions 84 that form at its circumferencial direction on cylindric barrel.Each pipe clamp portion 84 utilizes the incision 84c that is roughly the U font that barrel is cut on long side direction to form respectively, constitutes to the tongue piece as shoestring that the other end extends from an end of cylindrical body 82.The part of the free end portion 84a that separates with cylindrical body 82 of this tongue piece has to the inside the 84b of flexing portion of " ㄑ " font warpage as shown in the figure, to be starting point with base end part that cylindrical body 82 still is being connected, and overall warpage to the inside.
In the time of will having as mentioned above the outer end periphery that inserts in glass bulb 10 of the cylindrical body that constitutes 82, the top 84b of " ㄑ " word of free end portion touches the periphery of the glass bulb 10 relative with the outer peripheral face of electrode body 21, whole pipe clamp portion 84 is a basic point with above-mentioned base end part, to the radially foreign side elastic deflection (strain) of glass bulb 10, prop up the top that is held in glass bulb 10 by means of its recuperability.By means of this, can make glass bulb 10 roughly consistent with formation cylindrical body cylindraceous 82 both axle center.Also have, for the internal diameter machining accuracy that improves cylindrical body 82 comes in contact with the surface of glass bulb 10 avoiding, and reduce the Temperature Influence of 82 cylindrical body, preferably being defined in the scope of d 〉=0.2mm between the outer surface of the inner surface of the cylindric portion of cylindrical body 82 and glass bulb 10 apart from d.
Again, connecting portion 83 extends banded (elongated thin rectangle flexure strip) leading-out portion 85 from cylindrical body 82, to the direction bending near tubular axis, is connected in the splicing ear 86 of the U font that lead-in wire 22 ground form from the end of leading-out portion 85.
If the current feed terminal 81 that constitutes is as mentioned above inserted in cold-cathode fluorescence lamp outside cylindrical body 82 1 sides, cylindrical body 82 can be utilized as mentioned above the function with the pipe clamp portion 84 of its part formation, locatees on diametric(al) with respect to glass bulb 10.At this moment, the outer peripheral face Zone Full ε of top 84b that the pipe clamp portion 84 on the cylindrical body 82 of being arranged at forms its " ㄑ " font and the glass bulb 10 relative with lead-in wire 22 (inner lead 25) in the glass bulb 10 does not contact, and pushes the outer peripheral face of the glass bulb 10 relative with the tube portion 23 of electrode body 21.
This structure does not promptly all have contact at the outer peripheral face Zone Full ε of the glass bulb 10 relative with lead-in wire 22 in the glass bulb 10, therefore the temperature of lead-in wire 22 peripheries of outer peripheral face Zone Full ε is not easy to reduce, be not easy to assemble mercury vapour around the lead-in wire 22, therefore be not easy to take place discharge path mercury vapour deficiency, the cold-cathode fluorescence lamp briliancy reduces, or the briliancy of the lamp phenomenon slowly that rises.Consequently, the life-span of lamp is long and have enough briliancy.
On the other hand, splicing ear 86 is along with the insertion of lead-in wire 22 (outside leads 26), and the leading section of lead-in wire 22 inserts the U font portion of splicing ear 86.Then, splicing ear 86 is connected with the leading section riveted joint of lead-in wire 22, keeps (stable connection) with this and be electrically connected state.As a result, can be with respect to the position on the axis direction of glass bulb 10 decision current feed terminals 81.
Also have, carry out covering the splicing ear 86 of this riveted joint with soft metals such as soft solder, hard solders after the above-mentioned riveted joint, or utilize means such as laser welding further to improve bonding strength.
Again, above-mentioned current feed terminal 81 is not limited to the stainless steel manufacturing, considers from corrosion resistance and elasticity, also can adopt other metal materials such as phosphor bronze.And shape of pipe clamp portion 84 (length, cross section), number, allocation position etc. also are not limited to top described certainly.To sum up, so long as can in cylindrical body 82, elasticity support the structure of glass bulb 10 to get final product.
For example the cylindrical internal surface of cylindrical body 82 in a circumferential direction 3 five equilibriums (with the regulation angle cut apart or many five equilibriums), on the position of this 3 five equilibrium, be provided on its cylindrical internal surface deep-draw processing, two dowel pins (ダ ボ) (not shown) that form to glass bulb 10 outer peripheral faces one and the top 84b of above-mentioned " ㄑ " font side-prominently.Utilize this structure, can enough parts the outer peripheral face of the glass bulb top 84b with above-mentioned " ㄑ " font be pushed, prop up with two dowel pins that are provided with on the cylindrical internal surface and be held in the last position of certain distance.
Figure 10 is the profile of current feed terminal 91 of the cold-cathode fluorescence lamp of expression variation 5.
Variation 5 is that with the difference of variation 4 connecting portion 93 of current feed terminal 91 forms from the front end warpage of leading-out portion 95, contacts with an end face formation face of lead-in wire 22, utilizes welding method to be connected with face contact portion 96 with lead-in wire 22.If adopt this structure, utilize connecting portion 93 application of force on the central axis direction of lead-in wire 22, therefore can suppress to put on the bending force on the lead-in wire 22.And can enough laser welding, resistance welded, or face contact portion 96 22 stably is connected with going between with soft metals such as solder and brazing metals, can also determine position on the axis direction of current feed terminals 91 with respect to glass bulb 10.
Figure 11 is the profile of current feed terminal 101 of the cold-cathode fluorescence lamp of expression variation 6.
Variation 6 is with the difference of above-mentioned variation 4, the connecting portion 103 of current feed terminal 101 forms from the front end warpage of leading-out portion 105, and make current feed terminal 101 connecting portion 103 and lead-in wire 22 a part of outer peripheral face near to or in contact with, the part 106 of plane contact is welded to connect with lead-in wire 22, and the end face of the warpage of the connecting portion 103 relative with accumulation portion 27 is contacted with accumulation portion 27.If adopt this structure, then put on the bending force of lead-in wire on 22 and be suppressed, plane contact portion 106 and lead-in wire 22 can enough laser welding, resistance welded, or realize stable connection with soft metals such as solder or brazing metals.And can be with respect to the position of the current feed terminal 101 on the glass bulb 10 decision axis directions.
Figure 12 is the profile of current feed terminal 201 of the cold-cathode fluorescence lamp of expression variation 7.
Variation 7 is with the difference of above-mentioned variation 4, the connecting portion 203 of current feed terminal 201 forms from the front end warpage of leading-out portion 205, and make the connecting portion 203 of current feed terminal 201 contact with the end face generating plane of accumulation portion 27, through hole 203a (or notch) is set simultaneously so that can insert lead-in wire 22, and difference also is, after above-mentioned contact, connecting portion 203 and lead-in wire 22 and accumulation portion 27 are welded with soft metals such as solder or brazing metals.If adopt this structure, be beneficial to accumulation portion 27 application of forces of 203 pairs of lead-in wires 22 of connecting portion, therefore can suppress to put on the bending force on the lead-in wire 22.And soft metals such as enough solders of energy or brazing metal realize that the roomy accumulation portion 27 of contact-making surface is connected with the stable of plate face of connecting portion 203.And the position of the determining positions current feed terminal 201 of accumulation portion 27 that can enough glass bulbs 10, therefore can shorten the length of lead-in wire 22, shorten the total length of cold-cathode fluorescence lamp.
Figure 13 is the profile of current feed terminal 301 of the cold-cathode fluorescence lamp of variation 8.
Variation 8 is that with the difference of above-mentioned variation 7 current feed terminal 301 that is to say that for the bottom tube-like body is arranged the leading-out portion of current feed terminal 301 is parts of the cylindrical body 82 of tubular, and connecting portion 303 usefulness bottoms form.If adopt this structure, the through hole 203a of the 22 insertion connecting portions 303 that then go between makes accumulation portion 27 contact with the plate face realization face of connecting portion 303, and therefore the bending force that puts on the lead-in wire 22 is inoperative.And with soft metals such as solder or brazing metals connecting portion 303 and lead-in wire 22 and accumulation portion 27 are welded thereafter, therefore can stably connect.And the position of the determining positions current feed terminal 301 of accumulation portion 27 that can enough glass bulbs 10, therefore can shorten the length of lead-in wire 22, shorten the total length of cold-cathode fluorescence lamp.
Figure 14 is the stereogram of the current feed terminal 401 that is provided with of the end of the cold-cathode fluorescence lamp of variation 9.
Variation 9 is with the difference of above-mentioned variation 4, the connecting portion 403 of current feed terminal 401 is extended abreast by barrel and the tubular axis A from cylindrical body 82, and the rectangular leading-out portion 405 of vertical bending midway constitutes with the elasticity holding part of the elongated end that is arranged at leading-out portion 405 406.
Specifically, elasticity holding part 406 has the square plate-like portion vertical with tubular axis A, is base portion 406a and seizes sheet 406b, 406c on both sides by the arms from a pair of elasticity that base portion 406a extend to be provided with.And elasticity is seized sheet 406b, 406c on both sides by the arms and is respectively the rectangle of extending to cylindrical body 82 1 sides from the relative limit portion of base portion 406a.Elasticity is seized sheet 406b, 406c (to tubular axis A) flexing formation to the inside " ㄑ " font on both sides by the arms, and elasticity is being seized 22 (Fig. 8, the Fig. 9) that go between on both sides by the arms between the top of this flexing portion.
If adopt this structure, then can make the preceding end in contact of base portion 406a and lead-in wire 22, with this position with respect to glass bulb 10 decision current feed terminals 401.
Again, current feed terminal 401 is because lead-in wire 22 and elasticity are seized sheet 406b, 406c on both sides by the arms forms to put and contact, even therefore cylindrical body 82 tilts a little with respect to glass bulb 10 (Fig. 8, Fig. 9), lead-in wire 22 also can be avoided between described top effectively, and lead-in wire 22 is not easy to be subjected to forcing power.
And because lead-in wire 22 inserts easily elasticity holding part 406 and takes off from this elasticity holding part 406, so current feed terminal 401 loads and unloads convenient on glass bulb 10.
Figure 15 is the stereogram of the current feed terminal 501 that is provided with of the end of the cold-cathode fluorescence lamp of variation 10.
Variation 10 is with the difference of above-mentioned variation 9, and the connecting portion 503 of current feed terminal 501 has from the barrel of cylindrical body 82 to extended rectangular leading-out portion 505 of tubular axis A direction and the elasticity holding part 506 that extends to form from leading-out portion 505.
Specifically, elasticity holding part 506 has basically the structure identical with above-mentioned elasticity holding part 406.Just constitute by seizing sheet 506b, 506c on both sides by the arms from the extended a pair of elasticity of base portion 506a.Its characteristic point is, is to comprise leading-out portion 505, is bent the member that is processed to form from the position of the regulation of cylindrical body 82 extended strap on its length direction.
If adopt this structure, to compare with variation 9, the material use amount of the connecting portion 503 of current feed terminal 501 is few, can seek lightweight on the whole.
Again, to insert elasticity holding part 506 very convenient these advantages also identical with above-mentioned variation 9 for lead-in wire 22.On the other hand, form lead-in wire 22 again and be not easy the structure of extracting from elasticity holding part 506.Want to extract lead-in wire at 22 o'clock leading-out portion 505 just (to tubular axis A) deflections to the inside from elasticity holding part 506.Consequently, voltage lead wires 22 is pressed in the 506c of flexure strip portion displacement to the inside too, and frictional force increases between 506c of flexure strip portion and the lead-in wire 22.Therefore, in case current feed terminal 501 is fit to be used in the situation that needs not take off that just is contained on the glass bulb 10.
And go between 22 slotting unloading of elasticity holding part 506 owing to be convenient to, so current feed terminal 501 slotting on glass bulb 10 unloaded also convenient.
Figure 16 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 11.
Variation 11 with a very big difference of the foregoing description 1 is, has step on the outer peripheral face of tubular hardware 801, and another difference is arranged, and promptly not have to form and the suitable part of film portion 32b of example 1.
Specifically, the tubular hardware 801 of the cylindrical body 803 of current feed terminal 802, as shown in figure 17, have the 1st portion 804 and bigger to 805, the 2 portion's 805 external diameters of the 2nd portion of tubular axis A direction lead-in wire side extension than the 1st portion's 804 external diameters from the 1st portion 804.
If adopt this structure, when on one group of socket 1600 of the backlight unit of following explanation, cold-cathode fluorescence lamp being set, can easily lamp be located on tubular axis A direction with the part of the end face 1640 of the tubular axis A direction of socket 1600 lead-in wire side by on the step 806 that is pressed in by the 1st portion 804 and the external diameter difference generation of the 2nd portion 805 it being contacted.
The 1st portion 804 is identical with the wall thickness of the 2nd portion 805, and therefore 805 to the 1 portion's 804 internal diameters of the 2nd portion are big.Owing to there is not the suitable part of film portion 32b of formation and example 1, therefore the inner surface of the 1st portion 804 is close to the outer peripheral face of glass bulb 10.On the other hand, the inner surface of the 2nd portion 805 does not contact with the outer peripheral face of glass bulb 10, and is gapped between their face, and this gap forms the noncontact S of portion.
Figure 18 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 12.
Variation 12 is to have step on the outer peripheral face of cylindrical body 811 with a great difference of above-mentioned variation 4.
Specifically, the cylindrical body 811 of current feed terminal 812 has the 1st portion 813 and bigger than the 1st portion's 813 external diameters to 814, the 2 portion's 814 external diameters of the 2nd portion of tubular axis A direction lead-in wire side extension from the 1st portion 813.
If adopt this structure, the same with variation 11, can easily lamp be located on tubular axis A direction with the part of the end face of the tubular axis A direction of socket (not shown) lead-in wire side by on the step 815 that is pressed in by the 1st portion 813 and the external diameter difference generation of the 2nd portion 814 it being contacted.
The 1st portion 813 is identical with the wall thickness of the 2nd portion 814, and therefore 814 to the 1 portion's 813 internal diameters of the 2nd portion are big.Therefore, the gap that forms between the outer peripheral face of the inner surface of the 2nd portion 814 and glass bulb 10 is bigger than the gap between the outer peripheral face of the inner surface of the 1st portion 813 and glass bulb 10, and the inner surface of the 2nd portion 814 is not easy and glass bulb 10 contacting structure.Also have, the base end part of pipe clamp portion 84 is disposed at the 2nd portion 814.The 2nd portion 814 can make the outer peripheral face of the base end part of pipe clamp portion 84 further from glass bulb 10 owing to bigger than the 1st portion's 813 external diameters, and pipe clamp portion 84 forms the easier structure that works as flat spring.
Figure 19 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 13.
Variation 13 is to have 2 steps on the outer peripheral face of cylindrical body 821 with a great difference of above-mentioned variation 11.
Specifically, the cylindrical body 821 of current feed terminal 822 as shown in figure 20, has the 1st portion 823 and bigger than the 1st portion's 823 external diameters respectively to 824,825, the 2 portion's 824,825 external diameters of a pair of the 2nd portion of tubular axis A direction both sides extension from the 1st portion 823.
If adopt this structure, in the time of on the one group of socket 1600 that cold-cathode fluorescence lamp is arranged at the backlight unit that the following describes, be beneficial to step 826,827, easily lamp located on tubular axis A direction by the external diameter difference generation of the 1st portion 823 and the 2nd portion 824,825.And, by the hollow portion 828 that socket 1600 is embedded between two ladders 826,827, the lamp that can utilize the both direction of two steps 826,827 on tubular axis A direction to limit after locating is offset to tubular axis A direction, therefore can reduce the damage that causes cylindrical body 821 surfaces with the friction of socket 1600.Also have, the dimensional variations of glass bulb 10 on tubular axis A direction that cause owing to reasons such as thermal expansion are arranged above-mentioned location preferably only carried out a side in the current feed terminal 822 at the both ends of glass bulb 10.
Because the 1st portion 823 is identical with the wall thickness of the 2nd portion 824,825,824,825 to the 1 portion's 823 internal diameters of the 2nd portion are big.Because do not have to form the part of the film portion 32b that is equivalent to example 1, the inner surface of the 1st portion 823 and the outer peripheral face of glass bulb 10 are close to.On the other hand, the inner surface of the 2nd portion 824,825 does not contact with the outer peripheral face of glass bulb 10, forms the gap between these faces respectively, and the gap of tubular axis A direction lead-in wire side wherein forms the noncontact S of portion.
Figure 21 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 14.
Variation 14 is to have 2 steps on the outer peripheral face of cylindrical body 811 with a great difference of above-mentioned variation 12.
Specifically, the cylindrical body 831 of current feed terminal 832 has the 1st portion 833 and bigger than the 1st portion's 833 external diameters respectively to 834,835, the 2 portion's 834,835 external diameters of a pair of the 2nd portion of tubular axis A direction both sides extension from the 1st portion 833.
If adopt this structure, the same with variation 12, the part of the end face of the side that the tubular axis A direction of socket (not shown) can be gone between is in contact with one another it by being pressed on the step 836 of utilization by the external diameter difference generation of the 1st portion 833 and the 2nd portion 834, easily lamp is located on tubular axis A direction.And, by socket being embedded the hollow portion 838 between two ladders 836,837, the lamp that can utilize the both direction of two steps 836,837 on tubular axis A direction to limit after locating is offset to tubular axis A direction, therefore can reduce the damage that causes cylindrical body 831 surfaces with the friction of socket.Also have, the dimensional variations of glass bulb 10 on tubular axis A direction that cause owing to reasons such as thermal expansion are arranged above-mentioned location preferably only carried out a side in the current feed terminal 832 at the both ends of glass bulb 10.
Because the 1st portion 833 is identical with the wall thickness of the 2nd portion 834,835,834,835 to the 1 portion's 833 internal diameters of the 2nd portion are big, and the gap between the inner surface of the 2nd portion 834,835 and the outer peripheral face of glass bulb 10 is bigger than the gap between the outer peripheral face of the inner surface of the 1st portion 833 and glass bulb 10.Thereby the inner surface that forms the 2nd portion 834,835 is not easy and glass bulb 10 contacting structure.Also have, the base end part of pipe clamp portion 84 is disposed at the 1st portion 833.By means of this, form and easily socket is pressed on the structure that on the ladder 836 it is in contact with one another.
Figure 22 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 15.
Variation 15 with a great difference of above-mentioned variation 4 is, is provided with on relative a pair of ora terminalis 842,843 part separately of the slit portion 841 that clips cylindrical body 82 and crosses over the slit portion 841 a pair of holding sections of engaging mutually.
Specifically, the recess that forms 844 that forms by the part of a relative side's who cuts described slit portion 841 ora terminalis 842 of a pair of holding section and be arranged on the position relative on another ora terminalis 843 and protuberance 845 that front end embeds in the recess 844 constitutes with recess 844.
If adopt this structure, then can utilize recess 844 restriction protuberances 845 to the moving of tubular axis A direction, therefore be not easy to take place of the distortion of a pair of ora terminalis 842,843 from the cylindrical body 82 of relative offset, the shape of cylindrical body 82 can be stablized.And the overall dimension tolerance of the width reply glass bulb of the enough slits 841 of energy.
Also have, recess 844 with protuberance 845 so long as can limit a pair of ora terminalis and get final product from the shape of relative offset.For example recess 844 is not limited to the outer peripheral face of cylindrical body 82 is cut out the quadrangle otch, and protuberance 845 is not limited to the outer peripheral face of cylindrical body 82 is cut into the quadrangle projection, also can cut out quadrangle polygon otch or polygon projection in addition.Again, paired holding section also can be provided with how right.
Figure 23 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 16.
Shown in Figure 23 (a), variation 16 is that the inner surface of the end 851 of the coreless armature side of the tubular axis A direction of cylindrical body 82 forms chamfering with a great difference of above-mentioned variation 15.Chamfered section 852 shown in Figure 23 (b) is to form ramped shaped in the whole circumference direction on the end 851 of the tubular axis A of cylindrical body 82 direction coreless armature side.
Utilize such structure, the damage that on glass bulb 10 surfaces, causes in the time of can reducing current feed terminal 81 insertion glass bulbs 10, and can easily current feed terminal 81 be installed on the glass bulb 10.
Figure 24 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 17.
Variation 17 is that the end 861 of the tubular axis A direction coreless armature side of cylindrical body 82 forms horn-like with a great difference of above-mentioned variation 15.Owing to adopt such structure, it is big that the internal diameter of above-mentioned end 861 becomes, and therefore when current feed terminal 81 is inserted glass bulb 10, can reduce the damage that is subjected on glass bulb 10 surfaces, and can easily current feed terminal 81 be installed on the glass bulb 10.
Figure 25 is the stereogram of current feed terminal of the cold-cathode fluorescence lamp of expression variation 18.Figure 26 represents that this current feed terminal is installed on the state of cold-cathode fluorescence lamp front and back.
Variation 18 has a great difference with above-mentioned variation 9 on the structure of cylindrical body 871.As shown in figure 25, cylindrical body 871 sections roughly form the C font, many (being 6 in the present example) rectangular elastic tongue pieces 874 that cylindrical body 871 has the cylinder body 873 that has slit portion 872 on the cylindrical body axis direction and extends to form from an end of cylinder body 873.Elastic tongue piece 874 forms by the slit portion 875 that many (being 6 in the present example) of uniformly-spaced offering in a circumferential direction from an end of cylinder body 873 along the cylindrical body axis direction reach the degree of depth of regulation.Owing to form a structure that is connected with the slit portion 872 of cylinder body 873 in the slit 875, can utilize the elastic force of the part that is roughly the C font to solve the problem of the overall dimension tolerance of glass bulb 10,876 of current feed terminals can be held on the outer peripheral face of glass bulb 10.
Elastic tongue piece 874 is respectively to be basic point near the base end part of cylinder body 873 sides, bending to the inside on the whole, and near free-end partly to the inside flexing form " ㄑ " font, the leading section of elastic tongue piece 874 expands to horn-like.To form " ㄑ " glyph shape be to avoid when inserting in cold-cathode fluorescence lamp outside with current feed terminal 876 angle of the front end of elastic tongue piece 874 that the outer peripheral face of glass bulb 10 is caused damage to flexing like this, also, can successfully current feed terminal be installed on the glass bulb end smoothly in order to insert the end 12 of glass bulb 10 easily.
Here, the diameter of the imaginary cylinder of each top inscribe of stretching out with the inboard (the outer peripheral face side of glass bulb 10) to above-mentioned " ㄑ " font flexing portion of each elastic tongue piece 874 is set to littler than the external diameter of glass bulb 10.
As shown in figure 26, to have when the current feed terminal 876 of said structure is outer to insert in the end of glass bulb 10, the top of " ㄑ " font of each elastic tongue piece 874 contacts with the outer peripheral face of glass bulb 10, elastic tongue piece 874 integral body are the radial outside elastic deflection (strain) of basic point to glass bulb 10 with above-mentioned base end part, seize glass bulb 10 on both sides by the arms with its recuperability.By means of this, glass bulb 10 is positioned in the cylinder body 873 under making the roughly consistent state of its axle center and cylinder body 873.
By means of such structure, load is uniformly distributed on the whole outer peripheral face of cylindrical body 871, therefore can prevent breaking of glass bulb 10.And can improve the inner surface of cylindrical body 871 and glass bulb 10 outer surface be close to degree, therefore after current feed terminal 876 is installed on glass bulb 10, can make that current feed terminal 876 is not easy to move relative to glass bulb 10 on the tube axial direction of glass bulb 10.
Also have, the shape of elastic tongue piece 874 and slit 875, number, allocation position etc. are not limited to top described situation certainly.To sum up, glass bulb 10 elasticity can be propped up the structure that is held in the cylindrical body 871 as long as form.
Figure 27 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 19.
Variation 19 has a great difference with above-mentioned variation 9 on the structure of cylindrical body 881.Cylindrical body 881 is that the wire elastomeric material 882 that metal material forms is wound as spiral helicine member.If adopt this structure, just can form cylindrical body 881 with material itself, therefore can reduce material unaccounted-for (MUF).
Cylindrical body 881 has the 1st portion 883 and big to 884 to the 1 portion's 883 external diameters of 884, the 2 portions of the 2nd portion of cylindrical body axis direction lead-in wire side extension from the 1st portion 883.The inner surface of the 1st portion 883 is close to the outer peripheral face of glass bulb 10, is supporting glass bulb 10 by the 1st portion 883.On the other hand, the inner surface of the 2nd portion 884 does not contact with the outer peripheral face of glass bulb 10, has the gap between their face, and the part in its gap forms the noncontact S of portion.Again, elastomeric material 882 its sections are circular, do not stay on the cylindrical body axis direction and are close to formation with gap, and cylindrical body 881 is not easy distortion.
Figure 28 is the stereogram of an end of the cold-cathode fluorescence lamp of expression variation 20.Figure 29 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 20.
Variation 20 has a great difference with above-mentioned variation 19 on the structure of elastomeric material.Cylindrical body 891 is that the plate-like elastic material 892 that metal material forms is wound as spiral helicine member.If adopt this structure, just can form cylindrical body 891 with material itself, therefore can reduce material unaccounted-for (MUF).
Cylindrical body 891 has the 1st portion 893 and big to 894 to the 1 portion's 893 external diameters of 894, the 2 portions of the 2nd portion of cylindrical body axis direction lead-in wire side extension from the 1st portion 893.The inner surface of the 1st portion 893 is close to the outer peripheral face of glass bulb 10, is supporting glass bulb 10 by the 1st portion 893.On the other hand, the inner surface of the 2nd portion 894 does not contact with the outer peripheral face of glass bulb 10, has the gap between their face, and the part in its gap forms the noncontact S of portion.Again, tabular elastomeric material 892 is formed on the structure that keeps gap 895 on the cylindrical body axis direction in order to improve the heat dispersion of cylindrical body 891.
Figure 30 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 21.
Variation 21 is different on the structure of accumulation portion 27 with above-mentioned variation 4.Specifically, accumulation portion 27 is embedded in wherein with the state that buries fully in the recess 12a of the end 12 that is arranged at glass bulb 10, its bottom surface closely contacts with the bottom surface of recess 12a, and between the lateral circle surface of its side face and recess 12a at the lead-in wire B that radially keeps at a distance.
By means of such structure, in the end 12 of glass bulb 10, the bottom surface of accumulation portion 27 is close to it, therefore can suppress to put on the external impact of lead-in wire 22.And since the bottom surface of accumulation portion 27 lead-in wire radially have a gap, can prevent that under situations such as dip soldering material 27 thermal expansions of accumulation portion from damaging the end 12 of glass bulb 10.
Figure 31 is the amplification profile of an end of the cold-cathode fluorescence lamp of expression variation 22.
Variation 22 is different on the structure of accumulation portion 27 with above-mentioned variation 4.Specifically, accumulation portion 27 and the end 12 of glass bulb 10 between distance be set be configured for the gap of C, by means of such structure, when lead-in wire 22 increases with current feed terminal 30 solder joints or lamp current, 22 accumulation portion 27 heatings though go between, but because and keep the gap between the end 12 of glass bulb 10, therefore can on the end 12 of glass bulb 10, not apply thermal stress owing to the thermal expansion of accumulation portion 27.Consequently, can avoid the end 12 of glass bulb 10 to be damaged, prevent leakage.Also have, distance C is under the situation of 0.1mm～0.5mm, even for example will go between in advance under the situation of 22 dip soldering material, owing to do not have the dip soldering material on the lead-in wire 22 of gap portion yet, can further suppress the generation of the situation that the end 12 of glass bulb 10 is damaged, prevent leakage.
As mentioned above, the current feed terminal that is arranged at the two ends of glass bulb 10 is not limited to the shape of above-mentioned example 1, variation 1～22, also can be their combination.
Again, it is identical that current feed terminal is not limited to the two ends shape, also can with any combination in above-mentioned example 1, the variation 1～22.
Description of test
In the cold-cathode fluorescence lamp of above-mentioned example, the temperature characterisitic of electrode perimeter is measured, the thermolysis of current feed terminal is studied.
Again with the product 1 (being equivalent to existing procucts) as a comparison of the cold-cathode fluorescence lamp that does not have current feed terminal shown in Figure 32 (a), to shown in Figure 32 (b), have current feed terminal, but the cold-cathode fluorescence lamp that there is a contact in pipe clamp portion 84 at the outer peripheral face Zone Full of the glass bulb 10 relative with lead-in wire 22 in the glass bulb 10 is product 2 as a comparison, shown in Figure 32 (c) with the cold-cathode fluorescence lamp of above-mentioned variation 4 as product of the present invention.And, consider high brightness requirement in recent years, as experiment condition, with the lamp current 20mA of modulation frequency a 40～100kHz, cold-cathode fluorescence lamp (lamp current in the past about 3 times) work, measure the surface temperature W1 of the glass bulb 10 relative and the surface temperature W2 of the glass bulb 10 relative with the interior lead-in wire of glass bulb 10 22 with coreless armature 20.
Also have, the current feed terminal 81 usefulness inside diameter D of product of the present invention are that 5mm, length L 1 are that 3.5mm, L3 are that 1.5mm, thickness are the thin hardware formation of the stainless steel manufacturing of 0.1mm for 7mm, L2.Again, relatively the size of the current feed terminal 81a of product 2 is identical in fact with the current feed terminal 81 of the product of the invention described above, but the 84b of flexing portion of pipe clamp portion 84 with glass bulb 10 in the outer peripheral face Zone Full of the relative glass bulb 10 of lead-in wire 22 have the contact this point different.
At first, relatively product 1, and its surface temperature W1 is about 200 ℃, and surface temperature W2 is about 195 ℃, and temperature difference is less, and about 5 ℃, 22 peripheries that therefore go between can not be detained mercury vapour.Consequently, not only can realize the long-life, and can make light fixture that sufficiently high brightness is arranged.
And product 2 relatively, its surface temperature W1 is about 160 ℃, and surface temperature W2 is about 140 ℃, temperature difference is bigger, is about 20 ℃, and 22 peripheries that therefore go between are detained mercury vapours easily.So mercury vapour deficiency on the discharge path, the brightness of cold-cathode fluorescence lamp is low, and slow these phenomenons of brightness rising of lamp take place easily.Consequently, relatively product 2 compare 1 life-span of product weak point, and the brightness of lamp is low.
Therefore but under the situation of product of the present invention, its surface temperature W1 is about 165 ℃, and surface temperature W2 is about 160 ℃, and temperature difference is little, is about 5 ℃, and with relatively product 1 are the same, 22 periphery is not detained mercury vapour going between.And known comparing with product 1 relatively can make surface temperature W1 reduce about 35 ℃, therefore can reduce the sputter amount of coreless armature inner surface, and can prevent that when the coreless armature leading section contacted with the glass bulb inner surface, the heat of coreless armature leading section caused glass bulb inner surface heat fusing.And known because said temperature difference is little, is about 5 ℃, so lamp can access stable brightness, and the brightness of the lamp slow phenomenon that rises also is not easy to take place.
Also have, the present invention makes with the outer surface of the 84b of flexing portion of pipe clamp portion 84 and the glass bulb 10 relative with the tube portion 23 of the electrode body 21 of coreless armature 20 and contacts, at this contact site the coreless armature 20 that reaches a high temperature is arranged, therefore the situation that mercury vapour is detained can not take place.
Again, even the 84b of flexing portion of the present invention's pipe clamp portion 84 is between the front end of a pair of coreless armature 20, under the situation of the outer surface contact of the front end of coreless armature 20 glass bulb 10 nearby, the temperature of above-mentioned contact portion also specific surface temperature W1 is low, and this temperature gradient is exactly the moving direction of mercury vapour, and mercury vapour is not detained.Thereby the installation site of the 84b of flexing portion of pipe clamp portion 84 preferably is arranged near the outer surface of the glass bulb 10 the tube portion 23 of coreless armature 20 and the above-mentioned front end.
Again, in above-mentioned lamp current 20mA, be illustrated, even but lamp current is 3.5～22mA, also can access the effect identical with the present invention.
Below the surface roughness Ra of the part that is sealed by glass bulb 10 of lead-in wire 22 in the cold-cathode fluorescence lamp of above-mentioned example and the dependency relation of peeling off between the generation intensity N are investigated.
As measurement, adopt the cold-cathode fluorescence lamp that does not have current feed terminal shown in Figure 33.This cold-cathode fluorescence lamp, the external diameter of glass bulb 10 is 4mm, internal diameter is 3mm, the external diameter that is arranged at bead (bead) 12b of the end of glass bulb 10 is 2.78mm, length E on the tubular axis A direction is 2mm, and the line footpath F of inner lead 25 is 0.8mm, and the distance C between the end 12 of accumulation portion 27 and glass bulb 10 is 0.25mm, the external diameter G of the coreless armature 20 of nickel manufacturing is 2.7mm, and the length on the tubular axis A direction is 10mm.
As surface roughness Ra, the surface roughness Ra of confocal some infrared laser microscope of usefulness scan-type (LEXT.OLS3000 that Olympus Co., Ltd makes) measurement inner lead 25 five times is asked its mean value.Specifically, as shown in figure 34, to along line segment (1)～(5) expression of 260 microns of the length of lead-in wire axis direction, the outer peripheral face of equally spaced locational inner lead 25 is measured on the circumferencial direction of lead-in wire.
Peel off and intensity N takes place 22 apply external force etc. going between, from 25 the intensity when peeling off glass that go between, utilize and use the lateral load test of recommending meter (push-pull gauge, the DS2-500N that the イ マ ダ of Co., Ltd. makes) and strain observation instrument to measure.Specifically, as shown in figure 35, in the speed of 1mm/min the leading section 900 of the detection usefulness of recommending by on the position of bead 12a (end 12 of glass bulb 10) 0.50mm, use the distortion visualizer to observe its situation on one side and read the moment of peeling off generation and recommend and count the measured value that obtains.
Figure 36 presentation surface roughness Ra and the measurement result of peeling off generation intensity N.Figure 37 presentation surface roughness Ra and the dependency relation of peeling off generation intensity N.
As shown in figure 36, surface roughness is that sealing intensity is abundant under the situation of 0.2Ra～0.8Ra, so bead 12 (hermetic unit) does not leak.And bead 12 (hermetic unit) does not have gassing yet.
On the other hand, be under the situation of 0.08Ra in surface roughness, the sealing intensity deficiency, so bead 12 (hermetic unit) leaks.And be under the situation of 0.99Ra in surface roughness, end 12 gassings.This is considered to because during the surface of lead-in wire 22 the part that is sealed in glass bulb 10 concavo-convex excessive when thick (surface cross), and its recess does not have glass to enter, easily gassing.Such bubble also may become the reason of leakage, is unfavorable therefore.
The result who measures is gathered, and the result can find dependency relation as shown in figure 37 on surface roughness Ra and glass generation intensity N.
The explanation of backlight unit
Figure 38 is the exploded perspective view of the general structure of the backlight unit of expression the present invention one example etc., and Figure 39 is the key diagram of the installment state of explanation cold-cathode fluorescence lamp.
As shown in figure 38, the backlight unit of mode under backlight unit 1000 LCD TVs of the present invention's one example, its structure is based on the structure of existing backlight unit basically.
Backlight unit 1000 possesses peripheral device 1100, diffusing panel 1200, diffusion disk 1300 and lens 1400, and use at the back side that is disposed at liquid crystal panel 1500.
Peripheral device 1100 is the casings with PETG (PET) resin manufacture of white, as shown in figure 39, is made of the side plate 1120～1150 that is roughly square reflecting plate 1110 and surrounds the periphery of said reflection plate 1110.In the inside of peripheral device 1100 and establish the cold-cathode fluorescence lamp 1 of many for example above-mentioned examples 1, the light of these cold-cathode fluorescence lamps 1 from the opening 1160 of above-mentioned peripheral device 1100 to diffusing panel 1200 radiation.
On reflecting plate 1110, dispose one group of socket 1600 on the position corresponding respectively with the installation site of each cold-cathode fluorescence lamp 1.Each socket 1600 is the members that form with the sheet material bending process that copper alloy such as phosphor bronze for example or aluminium are made, and is seized on both sides by the arms sheet 1610,1620 and is constituted with the above-mentioned link piece 1630 of seizing sheet 1610,1620 on both sides by the arms of ora terminalis binding down by a pair of.Seize the corresponding recess of profile that is provided with on the sheet 1610,1620 with cold-cathode fluorescence lamp 1 on both sides by the arms, when embedding cold-cathode fluorescence lamp 1 in the above-mentioned recess, can utilize above-mentioned flat spring effect of seizing sheet 1610,1620 on both sides by the arms that 1 of above-mentioned cold-cathode fluorescence lamp is held in socket 1600, simultaneously above-mentioned socket 1600 is electrically connected with current feed terminal 30.Cold-cathode fluorescence lamp 1 power supply of the lamp circuit of backlight unit 1000 (not shown) by installing in 1600 pairs of above-mentioned backlight units 1000 of socket.
Diffusing panel 1200 is tabular components made from polycarbonate resin (PC), blocks the opening 1160 ground configuration of peripheral device 1100.Diffusion disk 1300 usefulness polycarbonate resins are made, and lens 1400 usefulness allyl resins are made, and are overlapped in diffusing panel 1200 configurations respectively in regular turn.
Abovely backlight unit of the present invention is specified, but backlight unit of the present invention is not limited to above-mentioned example according to example.The backlight unit of formula under for example being not limited to also can be to dispose light guide plate on the back side of liquid crystal panel, disposes the backlight unit of the sidelight mode (being also referred to as satellite mode or light guide plate mode) of cold-cathode fluorescence lamp 1 at the end face of above-mentioned light guide plate.
The explanation of liquid crystal indicator
Figure 40 is the stereogram that the part of the liquid crystal indicator of expression the present invention one example is cut.As shown in figure 40, the liquid crystal indicator 2000 of the present invention's one example is 32 inches a liquid crystal TV set for example, the backlight unit 1000 and the lamp circuit 2200 of this example at the back side that possess the liquid crystal panel unit 2100 that comprises liquid crystal panel etc., is disposed at liquid crystal panel unit 2100.
Liquid crystal panel unit 2100 is known members, possesses for example (not shown) such as color filter substrate, liquid crystal, TFT substrate, driver modules, forms coloured image according to the picture signal from the outside.
Lamp circuit 2200 is used to make the cold-cathode discharge lamp 100 of backlight unit 1000 inside to light.
Abovely liquid crystal indicator of the present invention is specified, but liquid crystal indicator of the present invention is not limited to above-mentioned example according to example.
Industrial applicability
Cold-cathode discharge lamp of the present invention, backlight unit and liquid crystal indicator can use In whole lighting fields.

Claims (47)

1. a cold-cathode fluorescence lamp is characterized in that,
Possess glass bulb, be arranged at the coreless armature of inboard at described glass bulb both ends and the outside that is arranged at described glass bulb both ends respectively, the current feed terminal that is connected with the lead-in wire of described coreless armature, described current feed terminal has the conductivity cylindrical body that the outer peripheral face that surrounds described glass bulb is provided with, described cylindrical body at least with described glass bulb in the whole outer surface of the opposed described glass bulb of lead-in wire on roughly be not in contact with it.
2. cold-cathode fluorescence lamp according to claim 1 is characterized in that the inner surface of described cylindrical body is close to the outer peripheral face with the opposed glass bulb of described coreless armature.
3. cold-cathode fluorescence lamp according to claim 1 is characterized in that, described cylindrical body has the 1st portion and extends the 2nd portion that is provided with from the 1st portion to cylindrical body axis direction lead-in wire side, and the 2nd portion's external diameter is bigger than described the 1st portion's external diameter.
4. cold-cathode fluorescence lamp according to claim 1, it is characterized in that, described cylindrical body has the 1st portion and extends a pair of the 2nd portion that is provided with from the 1st portion to cylindrical body axis direction both sides, and this a pair of the 2nd portion's external diameter is bigger than described the 1st portion's external diameter respectively.
5. according to each the described cold-cathode fluorescence lamp in the claim 1～4, it is characterized in that described cylindrical body has slit portion on its axis direction, section forms and is roughly " C " font.
6. cold-cathode fluorescence lamp according to claim 5 is characterized in that, described cylindrical body is provided with on a part separately that clips the opposed a pair of ora terminalis of described slit portion crosses over a pair of holding section that described slit portion engages mutually.
7. cold-cathode fluorescence lamp according to claim 6 is characterized in that, a pair of holding section of described cylindrical body forms recess on an opposed side's of described slit portion ora terminalis, form protuberance on the opposing party's ora terminalis.
8. cold-cathode fluorescence lamp according to claim 5 is characterized in that, described cylindrical body at least the end of the opposition side of the lead-in wire side of its axis direction the inner surface chamfering or form horn-like.
9. according to each the described cold-cathode fluorescence lamp in the claim 1～4, it is characterized in that described cylindrical body has a plurality of elastic tongue pieces that are provided with along circumferencial direction, utilizes these a plurality of elastic tongue pieces to clip the outer peripheral face of described glass bulb.
10. cold-cathode fluorescence lamp according to claim 9 is characterized in that the leading section of described elastic tongue piece expands into horn-like.
11. cold-cathode fluorescence lamp according to claim 1 and 2 is characterized in that, described cylindrical body forms by being wound as spiral helicine metal material.
12. cold-cathode fluorescence lamp according to claim 11 is characterized in that, described cylindrical body is nestled up on the axis direction of cylindrical body by wire or banded elastomeric material and forms.
13. cold-cathode fluorescence lamp according to claim 1 and 2, it is characterized in that it is that the metal of the conducting film that forms of the material of copper or silver and the minimal thickness that is provided with across this conducting film constitutes that described cylindrical body is used on the outer peripheral face of described glass bulb with braze or principal component.
14. cold-cathode fluorescence lamp according to claim 13 is characterized in that, described cylindrical body and the discontiguous part of described glass bulb outer surface do not form described conducting film.
15. cold-cathode fluorescence lamp according to claim 1 is characterized in that, only the part of the inner surface of described cylindrical body contacts with the outer peripheral face of described glass bulb.
16. cold-cathode fluorescence lamp according to claim 15, it is characterized in that, described cylindrical body surface within it has to radially inner side outstanding, push with described glass bulb in the outer surface Zone Full of the opposed described glass bulb of lead-in wire beyond the outer peripheral face of described glass bulb, be held in the support member of described glass bulb.
17. cold-cathode fluorescence lamp according to claim 16 is characterized in that, described support member is the part bending of described cylindrical body, the part of this bending is pressed on the member of the outer peripheral face of described glass bulb.
18. cold-cathode fluorescence lamp according to claim 16 is characterized in that, described support member is distolateral to another distolateral extension from described cylindrical body, simultaneously from the described one distolateral a plurality of shoestring that form to described glass bulb one lateral buckling.
19. cold-cathode fluorescence lamp according to claim 16, it is characterized in that, described support member is the part bending of described cylindrical body, the member that the part of this bending is constituted by the side-prominent a plurality of dowel pins of member on the outer peripheral face that is pressed in described glass bulb and the outer peripheral face to described glass bulb that is formed at described cylindrical body inner surface.
20. cold-cathode fluorescence lamp according to claim 1, it is characterized in that, described lead-in wire has the accumulation portion bigger than the part external diameter that is packaged in described glass bulb with described current feed terminal engaging portion, and at least a portion of described accumulation portion is formed by nickel material, iron material or nickel plating material.
21. cold-cathode fluorescence lamp according to claim 1, it is characterized in that, described lead-in wire is to be formed by nickel material, iron material or nickel plating material and to connect the outside lead of described current feed terminal and be made of and the inner lead that engages described coreless armature engages and to form the material that is different from this outside lead, to have the accumulation portion bigger than described lead-in wire external diameter at described junction surface.
22., it is characterized in that described accumulation portion is the member of being close to its bottom surface in the end of described glass bulb or being close to its bottom surface and upwards keeping in the footpath of described lead-in wire burying underground with gap according to claim 20 or 21 described cold-cathode fluorescence lamps.
23. according to claim 20 or 21 described cold-cathode fluorescence lamps, it is characterized in that, keep the gap between the end of described accumulation portion and described glass bulb.
24. cold-cathode fluorescence lamp according to claim 23 is characterized in that, described gap is 0.1mm～0.5mm.
25. according to claim 20 or 21 described cold-cathode fluorescence lamps, it is characterized in that, described accumulation portion with axle center described lead-in wire cross section orthogonal be circular, its maximum gauge is bigger than the maximum outside diameter of described lead-in wire, than the little size of the maximum outside diameter of described glass bulb.
26. according to claim 20 or 21 described cold-cathode fluorescence lamps, it is characterized in that, described lead-in wire is form being formed by nickel material, iron material or nickel plating material and connecting the outside lead of described current feed terminal and engaged by the inner lead that the material that is different from this outside lead formed and engaged described coreless armature, have the accumulation portion bigger at described junction surface, and the pyroconductivity of the described inner lead of thermal conductivity ratio of described outside lead is little than described lead-in wire external diameter.
27. cold-cathode fluorescence lamp according to claim 21, it is characterized in that, described lead-in wire is form being formed by nickel material, iron material or nickel plating material and connecting the outside lead of described current feed terminal and engaged by the inner lead that the material that is different from this outside lead formed and engaged described coreless armature, described outside lead line footpath is thinner than described inner lead line footpath, and the pyroconductivity of the described inner lead of thermal conductivity ratio of described outside lead is little.
28. cold-cathode fluorescence lamp according to claim 1 is characterized in that, the surface roughness of the part that is packaged in described glass bulb at least of described lead-in wire is 0.2Ra～0.8Ra.
29. cold-cathode fluorescence lamp according to claim 28, it is characterized in that, one end of described lead-in wire and the welding of described coreless armature are fixing, the surface of this end is 0.2Ra～0.8Ra, and chamfer dimesion is, radical length is 0.08mm～0.15mm, and axial length is 0.1mm～0.25mm.
30. cold-cathode fluorescence lamp according to claim 1 is characterized in that, described current feed terminal possesses from described cylindrical body to the extension of cylindrical body axis direction lead-in wire side, the connecting portion that is connected with the part of described lead-in wire.
31. cold-cathode fluorescence lamp according to claim 1, it is characterized in that, described current feed terminal is the member that described cylindrical body inserts in the end periphery of described glass bulb outward, have banded leading-out portion that extends laterally from cylindrical body axis direction one end of described cylindrical body and the leading section that is arranged at this leading-out portion, the connecting portion that is connected with the part of described lead-in wire.
32., it is characterized in that the described lead-in wire pyroconductivity of described connecting portion thermal conductivity ratio is big according to claim 30 or 31 described cold-cathode fluorescence lamps.
33. cold-cathode fluorescence lamp according to claim 32 is characterized in that, the connecting portion of described cylindrical body, and its pyroconductivity is 75W/ (mK)～435W/ (mK), and conductivity is 9 * 10 6S/m～65 * 10 6S/m.
34., it is characterized in that described connecting portion forms U font portion near a part of outer surface of described lead-in wire according to claim 30 or 31 described cold-cathode fluorescence lamps, the part of described U font portion is connected with described lead-in wire by ca(u)lk.
35., it is characterized in that a part of outer surface of described connecting portion and described lead-in wire is approaching according to claim 30 or 31 described cold-cathode fluorescence lamps, it to be surrounded ground form cylindrical portion, the part of described cylindrical portion is connected with described lead-in wire by ca(u)lk.
36. cold-cathode fluorescence lamp according to claim 31 is characterized in that, a part of outer surface that described connecting portion clips described lead-in wire begins to be bent to form from the front end of described leading-out portion.
37. cold-cathode fluorescence lamp according to claim 36, it is characterized in that, described connecting portion has a pair of sheet of seizing on both sides by the arms of the outer surface that clips described lead-in wire, so that the described a pair of sheet of seizing on both sides by the arms is seized described lead-in wire on both sides by the arms to the pressing force of described lead-in wire the state more than the 100g of being at least separately and connected.
38. cold-cathode fluorescence lamp according to claim 31 is characterized in that, described connecting portion is with the part bending more forward than the extended front end of described leading-out portion, forms contiguously with the end face formation face with described lead-in wire.
39. cold-cathode fluorescence lamp according to claim 31 is characterized in that, described connecting portion is with the part bending more forward than the front end of described leading-out portion, forms contiguously with a part of outer surface formation with described lead-in wire.
40. cold-cathode fluorescence lamp according to claim 31, it is characterized in that, described connecting portion is to have the joint face that forms through hole or notch, to insert the mode of described lead-in wire at described through hole or notch, the member that will the part more forward be bent to form than the front end of described leading-out portion, insert described lead-in wire at described through hole or notch, described joint face is connected by soft metal with described lead-in wire.
41. according to claim 30 or 31 described cold-cathode fluorescence lamps, it is characterized in that, described lead-in wire has the accumulation portion bigger than the part external diameter that is packaged in described glass bulb with described current feed terminal engaging portion, and its part of described connecting portion and described accumulation portion contact.
42. according to claim 30 or 31 described cold-cathode fluorescence lamps, it is characterized in that, described lead-in wire is to engage formation with connecting the outside lead of described current feed terminal and the inner lead of the described coreless armature of joint, have the accumulation portion bigger than described inner lead external diameter at described junction surface, its part of described connecting portion and described accumulation portion contact.
43., it is characterized in that described connecting portion also utilizes welding or soft metal to be connected with a part of outer peripheral face of described lead-in wire according to claim 30 or 31 described cold-cathode fluorescence lamps.
44. cold-cathode fluorescence lamp according to claim 1 is characterized in that, described glass bulb sodium oxide content is that the glass material of 3 weight %～20 weight % scopes forms.
45. cold-cathode fluorescence lamp according to claim 1 is characterized in that, described glass bulb sodium oxide content is that the glass material of 5 weight %～20 weight % scopes forms.
46. a backlight unit is characterized in that, carries the described cold-cathode fluorescence lamp of claim 1 as light source.
47. liquid crystal indicator, it is characterized in that, possess the described backlight unit of display panels and claim 46, described backlight unit has the peripheral device that holds many described cold-cathode fluorescence lamps of claim 1, and described peripheral device is disposed at the back side of described display panels.
CN200980000052A 2008-01-28 2009-01-15 Cold cathode fluorescent lamp, backlight unit, and liquid crystal display device Pending CN101681752A (en)

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JP016135/2008 2008-01-28
JP2008016135 2008-01-28
PCT/JP2009/000130 WO2009096144A1 (en) 2008-01-28 2009-01-15 Cold cathode fluorescent lamp, backlight unit, and liquid crystal display device

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JP4826767B2 (en) * 2006-06-27 2011-11-30 サンケン電気株式会社 Connector for discharge tube, discharge tube with connector, and surface light source device
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TW200949892A (en) 2009-12-01
WO2009096144A1 (en) 2009-08-06

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