WO2008032705A1 - Lampe à décharge électrique, illuminateur et dispositif d'affichage à cristaux liquides - Google Patents

Lampe à décharge électrique, illuminateur et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2008032705A1
WO2008032705A1 PCT/JP2007/067656 JP2007067656W WO2008032705A1 WO 2008032705 A1 WO2008032705 A1 WO 2008032705A1 JP 2007067656 W JP2007067656 W JP 2007067656W WO 2008032705 A1 WO2008032705 A1 WO 2008032705A1
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WO
WIPO (PCT)
Prior art keywords
discharge lamp
glass bulb
electrode
emitter
sleeve
Prior art date
Application number
PCT/JP2007/067656
Other languages
English (en)
Japanese (ja)
Inventor
Kazuhiro Kumada
Taizou Ono
Hirofumi Yamashita
Takashi Maniwa
Akiko Nakanishi
Masanobu Murakami
Original Assignee
Panasonic Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Priority to CN2007800334208A priority Critical patent/CN101512719B/zh
Priority to JP2008534345A priority patent/JPWO2008032705A1/ja
Publication of WO2008032705A1 publication Critical patent/WO2008032705A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/007—Incandescent lamp or gas discharge lamp
    • G02B6/0071—Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube
    • 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
    • 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
    • G02F1/133612—Electrical details

Definitions

  • Discharge lamp, lighting device and liquid crystal display device are Discharge lamp, lighting device and liquid crystal display device
  • the present invention relates to a discharge lamp and an illumination device and a liquid crystal display using the discharge lamp as a main light source, and more particularly to a discharge lamp in which a metal conductor is provided on the outer periphery of a glass bulb end portion on which an electrode is disposed. .
  • Patent Document 1 discloses a cold cathode discharge lamp 2000 having a cap-like metal sleeve 2002 provided at the end of a glass bulb 2001 as shown in FIG.
  • the metal sleeve, 2002 also, a glass noref via reed spring 2003, electrically connected to the electrode 2004 disposed in the end of the 2001, the metal sleeve 2002 is the lamp holder of the lighting device
  • the cold cathode discharge lamp 2000 can be fixed to the lighting device and further connected to the lighting circuit of the lighting device, so that soldering etc. is not required when mounting the lighting device to the metal sleeve. It is easier to install than the no type.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 7-220622
  • the cold cathode discharge lamp 2000 when a negative voltage is applied to the electrode 2004 at the time of start-up, the glass bulb 2001 due to the electric field between the electrode 2004 and the proximity conductor 2005 (for example, the bottom plate of the lighting device). The ions inside are accelerated and collide with the electrode 2004 to generate secondary electrons. Then, the discharge is started from the secondary electrons.
  • the cold cathode discharge lamp 2000 is shorter than the distance L3 between the electrode 2004 and the proximity conductor 2005 by metal sleep, and the gap between the electrode 2002 and the proximity conductor 2005 is as much as 4 cm.
  • the force to become the same potential, metal sleep a higher electric field is generated between the metal sleeper 2002 and the near conductor 2005, and the electric field strength between the electrode 2004 and the near conductor 2005 becomes lower. This weakens the acceleration of electrons inside the glass bulb 2001 Therefore, it becomes difficult for the discharge to occur and the dark startability deteriorates.
  • the metal sleeve 2002 when the metal sleeve 2002 is extended in the tube axis direction of the glass tube 2001 to hide the whole of the electrode 2004, the metal sleeve 2002 becomes evil and becomes an electrode 2004 The field strength between the and the adjacent conductor is further reduced, and the dark start characteristic is degraded as the lighting becomes difficult.
  • an electrode is disposed inside at least one end of a glass bulb, and the outer periphery of the end is electrically connected to the electrode. It is a discharge lamp provided with a continuous metal conductor, characterized in that an emitter is provided at a position where the electric field strength is high enough to induce ion bombardment at start-up in the glass bulb.
  • one aspect of the discharge lamp according to the present invention is a discharge lamp attached to a lighting device provided with a close conductor electrically isolated from the lamp current path, wherein the emitter is
  • the discharge lamp When the discharge lamp is attached to the lighting device, it is provided so as to be located between the adjacent conductor and the electrode.
  • the emitter reaches the electrode from the proximity conductor at the shortest distance while avoiding the metal conductor between the proximity conductor and the electrode. It is characterized in that it is provided on the orbit.
  • the emitter may be provided on the glass bulb with the metal conductor, and the emitter may be provided on the inner surface of the part! It is characterized by
  • the metal conductor is a tubular shape having a slit or a notch
  • the emitter is a portion where the slit or the notch is located in the glass bulb.
  • an auxiliary emitter different from the emitter is provided on the electrode.
  • an edge of the metal conductor on the center side of the glass bulb is positioned closer to the center of the glass bulb than an edge of the electrode on the center side of the glass bulb. It is characterized by
  • one aspect of the discharge lamp according to the present invention is characterized in that the emitter is a cesium compound.
  • one aspect of the discharge lamp according to the present invention is characterized in that the emitter is provided with the metal conductor in the electrode, and is provided on the outer surface of the part!
  • the metal conductor is in a tubular shape having a slit or a notch, and the emitter is provided on the outer surface of a portion of the electrode where the slit or the notch is located. It is characterized by
  • one aspect of the discharge lamp according to the present invention is characterized in that the electrode is a bottomed cylindrical hollow electrode, and the emitter is provided on the inner surface of the cylinder of the electrode.
  • a lighting device according to the present invention is characterized by comprising the above discharge lamp.
  • a liquid crystal display device according to the present invention includes the above-described lighting device. Effect of the invention
  • the emitter since the emitter is provided at a position where the electric field strength is high enough to induce ion bombardment at startup in the glass bulb, ions in the glass bulb are accelerated by the electric field, and the emitter and the electrode are It is easy to get secondary electrons that are generated when you collide. Therefore, even when the electric field generated between the electrode and the adjacent conductor is low due to the metal conductor which easily starts the discharge starting from the secondary electrons, the dark startability is good. .
  • FIG. 1 is a cross-sectional view showing one end of a cold cathode discharge lamp according to a conventional example.
  • FIG. 2 A sectional view showing a discharge lamp according to the present embodiment.
  • FIG. 3 A perspective view showing a sleeve
  • FIG. 4 A diagram for explaining the mounting state of the cold cathode discharge lamp
  • FIG. 10 An enlarged cross-sectional view showing one end of the cold cathode discharge lamp of Modification 3.
  • FIG. 11 (a) is an enlarged plan view showing one end of the cold cathode discharge lamp of Modification 5, (b) is a cross-sectional view along line a-a shown in (a), (c) is a modification 5 is a perspective view showing the sleeve 5
  • FIG. 12 (a) is an enlarged plan view showing one end of the cold cathode discharge lamp of Modification 5, (b) is a cross-sectional view taken along the line b-b shown in (a), (c) is a modification 5 is a perspective view showing the sleeve 5
  • FIG. 14 An enlarged cross-sectional view showing one end of a cold cathode discharge lamp according to Modification 6.
  • FIG. 15 An enlarged cross-sectional view showing one end of a cold cathode discharge lamp according to Modification 7
  • FIG. 16 (a) is a front view showing one end of the cold cathode discharge lamp of Modification 8, (b) is a side view of Modification 8, (c) is a portion enclosed by a circle shown in (a) Enlarged sectional view
  • FIG. 18 (a) is a front view showing one end of the cold cathode discharge lamp of Modification 10, (b) is a perspective view showing a sleeve of Modification 10
  • FIG. 22 is an exploded perspective view showing the lighting apparatus according to the first embodiment.
  • FIG. 23 A partially broken perspective view showing a lighting device according to a second embodiment.
  • FIG. 24 A schematic view showing a liquid crystal display device according to the present embodiment.
  • Discharge lamp 10 110, 210, 310, 410, 510, 610, 710, 810, 860, 910, 1010, 1110 210 Glass valve
  • FIG. 2 is a cross-sectional view including the tube axis X of the discharge lamp according to the present embodiment.
  • the discharge lamp according to the present embodiment is a cold cathode discharge lamp 1 used as a light source of a backlight unit, and includes a glass bulb 10, a pair of electrodes 20 and 21, a pair of metal conductors As sleeves 30, 31 and an emitter 40 are provided.
  • the glass bulb 10 is formed, for example, by sealing both ends of a glass tube made of borosilicate glass (for example, SiO—BO 3 Al 2 O—KO 2 —TiO 2).
  • the glass tube is not limited to be made of borosilicate glass, and may be made of lead glass, lead free glass or soda glass. Sodium oxide (Na 2 O 3) for lead glass, lead free glass, soda glass, etc. And the like, and the alkali metals are easily eluted to the inner surface of the glass bulb with the passage of time, so that the dark startability of the cold cathode discharge lamp 1 can be improved by the force S.
  • the glass of the glass bulb 10 preferably has an alkali metal oxide content of 3 mol% or more and 20 mol% or less.
  • the alkali metal oxide is sodium oxide
  • the content thereof is preferably 5 [mol%] or more and 20 [mol%] or less. If it is 5 [mol%] or more, the dark startability is improved, and if it exceeds 20 [mol%], the glass bulb 10 may be blackened (browned) or whitened due to long-term use, resulting in a decrease in luminance, Problems arise such as the strength of the glass bulb 10 being reduced.
  • lead-free glass means glass having a lead content of less than 0.1 [wt%]. In the case of lead-free glass, although lead is not added positively, it is specified as less than 0.1 [wt%] because it may contain some lead as an impurity during the manufacturing process.
  • the glass bulb 10 has a total length of 730 mm, and comprises a glass bulb body 11 and a pair of end portions 12 and 13 positioned on both sides in the longitudinal direction of the glass bulb body 11.
  • the glass bulb body 11 is a tubular member having a circular cross section, and has an outer diameter of 4 mm, an inner diameter of 3 mm, and a thickness of 0 ⁇ 5 mm.
  • the pair of end portions 12 and 13 are respectively sealed by sealing portions 14 and 15, and electrodes 20 and 21 are disposed inside.
  • the maximum width A of the glass bulbs 10 in the sealed portions 14 and 15 in the tube axis X direction is 2 mm.
  • sleeves 30, 31 are provided on the outer periphery of each end 12, 13.
  • the dimensions of the glass bulb 10 are not limited to the above. However, in order to obtain an elongated cold cathode discharge lamp 1, it is desirable that the glass bulb 10 has a small diameter and a thin wall, so the glass none main body 11 has an inner diameter of 1.4 mm to 7.0 mm. , The thickness is preferably 0 ⁇ 2 [mm] ⁇ 0.6 [mm]! / ,.
  • a phosphor layer 16 is formed on the inner surface of the glass bulb 10.
  • the phosphor layer 16 may be, for example, a europium-activated barium aluminate 'BaMg Al O 2 blue phosphor
  • BAM-B cerium 'terbium-coactivated lanthanum phosphate [ LaPO: Ce 3+ , Tb 3+ ]
  • red phosphors are europium-activated oxidized yttri
  • mercury of about 1200 [g] and neon-argon mixed gas (Ne 95 [%] of about 8 [kPa] (20 [° C.]) as a rare gas ] + Ar5 [%]) is enclosed.
  • the mercury and the noble gas are not limited to the above.
  • neon / krypton mixed gas (Ne 95 [%] + Kr 5 [%]) may be enclosed as a noble gas! //.
  • Using a neon-krypton mixed gas as a rare gas improves the lamp startability and enables the cold cathode discharge lamp 1 to be lit at a low voltage.
  • the electrodes 20 and 21 are made of, for example, rod-like nickel (Ni), and are joined to lead wires 22 and 23 sealed in the sealing portions 14 and 15, respectively.
  • the electrodes 20 and 21 are not limited to those made of nickel, and may be made of, for example, niobium (Nb), tantalum (Ta), tungsten (W), or molybdenum (Mo).
  • the shape of the electrodes 20 and 21 is not limited to a rod shape, and may be a bottomed cylindrical shape, a flat plate shape, or the like.
  • Each lead wire 22, 23 is an internal lead wire 22a, 23a made of tansten (W) having a thermal expansion coefficient similar to that of the glass of the glass bulb 10, and an external lead made of nickel to which solder is easily attached. It is a connecting line formed by welding the lead wire 22b and 23b by welding.
  • Each lead wire 22, 23 linearly extends along the tube axis X direction of the glass bulb 10, and the bonding surface between the inner lead wire 22 a, 23 a and the outer lead wire 22 b, 23 b is the same as that of the glass bulb 10. It is almost flush with the outer surface. That is, the inner lead wires 22 a and 23 a are located inside the outer surface of the glass bulb 10, and the outer lead wires 22 b and 23 b are located outside the outer surface of the glass bulb 10.
  • the inner lead wires 22a and 23a have a substantially circular cross section, and have a total length of 3 mm and a wire diameter of 0.8 mm.
  • the end portions of the inner lead wires 22a and 23a on the outer lead wires 22b and 23b side are sealed in the sealing portions 14 and 15 of the glass valve 10, and the end portions on the opposite side to the outer lead wires 22b and 23b side Is joined to the electrodes 20, 21.
  • the external lead wires 22b and 23b have a substantially circular cross section, a total length B of 1 mm, and a wire diameter of 0.6 mm, and their axial centers substantially coincide with the tube axis X of the glass bulb 10. It is arranged. Outer lead, wire 22b, 23 bi, slief, 30, 31 inside the solder joint part 32, 33 is entirely buried, and the above-mentioned joint part 32, 33 Electrically with sleeves 30, 31 It is connected to the.
  • the length C of the joints 32, 33 in the tube axis X direction is 1.5 [mm].
  • the bulging portion 24, 25 having an outer diameter larger than that of the outer lead wire 22b, 23b is in close contact with the edge of the glass bulb 10. It is preferable that it be provided as such. That is, the bulging portions 24, 25 are located outside the outer surface of the glass bulb 10.
  • the bulges 24 and 25 are formed of the same nickel material as the external lead wires 22 b and 23 b.
  • the invention is not limited thereto.
  • the bulges 24 and 25 are formed of a material such as iron and nickel alloy, copper and nickel alloy. May be
  • the lead springs 22 and 23 are not limited to the passage of the inner lead springs 22a and 23a and the outer lead springs 22b and 23b, but may be a single line.
  • the lead wires 22 and 23 be an alloy of iron and nickel or the like.
  • FIG. 3 is a perspective view showing a sleeve.
  • the sleeve 30 (31) is a cylindrical body having a substantially C-shaped cross section, and has a slit 30 a (31 a), and is externally fitted to the end 12 (13) of the glass bulb 10. And attached to the outer periphery of the end 12 (13).
  • the sleeves 30, 31 have, for example, a length F in the direction of the tube axis X of 11 mm and a thickness of 120 m, and are made of an alloy of iron and nickel.
  • a copper alloy such as bronze, brass, nickel white or the like.
  • the inner diameter of the sleeves 30, 31 is designed to be slightly smaller than the outer diameter of the glass bulb 10, and some dimensional error occurs between the inner diameter of the sleeves 30, 31 and the outer diameter of the glass bulb 10. However, the dimensional error is absorbed by the slits 30a, 31a, and the inner surfaces of the sleeves 30, 31 are in close contact with the outer surface of the glass bulb 10.
  • the sleeves 30, 31 are electrically connected to the external lead wires 22b, 23b of the electrodes 20, 21 through joint portions 32, 33 made of solder.
  • the sleeves 30 and 31 are not limited to a cylinder having a substantially C-shaped cross section, and those having slits 30 a and 31 a provided in a cylinder having a substantially triangular or substantially quadrangular cross section, or an oval cylinder. It may be. Also, it is conceivable that the slits 30a and 31a are not provided. Furthermore, sleeves 30, 3 1 is not limited to the alloy made of iron and nickel, and may be made of a material having at least conductivity.
  • FIG. 4 is a view for explaining the mounting state of the cold cathode discharge lamp.
  • the cold cathode discharge lamp 1 is attached to the lighting device 50, for example, as shown in FIG.
  • a plurality of pairs of lamp holders 52 and 53 are arranged at positions corresponding to the mounting positions of the cold cathode discharge lamps 1.
  • Each lamp holder 52, 53 is formed by bending a plate made of copper alloy such as phosphor bronze or aluminum, for example, and is processed by a pair of sandwiching pieces 52a, 52b, 53a, 53b and the sandwiching pieces 52a, 52b. , 53a, 53b at the lower edge.
  • the pair of sandwiching pieces 52a, 52b, 53a, 53b is provided with a recess that matches the outer shape of the cold cathode discharge lamp 1, and if the cold cathode discharge lamp 1 is inserted into the recess, the sandwiching is performed as described above.
  • the cold cathode discharge lamp 1 is held by the lamp lateral ledges 52, 53 by the plate spring action of the pieces 52a, 52b, 53a, 53b, and electrically connected with the lamp lateral ledgers 52, 53 and the sleeps 30, 31, 31. Ru. Then, power is supplied to the cold cathode discharge lamp 1 attached to the lighting device 50 from a lighting circuit (not shown) of the lighting device 50 through the lamp holders 52 and 53.
  • the external lead wire 22b, 23b force S sleeve 30, 31 is entirely embedded in the joint portions 32, 33. It is less likely that the sealing portions 14 and 15 will be broken due to stress applied to the outer lead wires 22b and 23b when the lead wires 22b and 23b are hit against the lighting device 50 and bent.
  • the cold cathode discharge lamp 1 is designed to have a longer length F in the tube axis X direction of the sleeves 30 and 31 as compared with the conventional cold cathode discharge lamp. Therefore, as shown in FIG. 2, the sleep 30 and 31 glass non-ref, the edge 30a of the central ridge J 30a 31a force electrode 20 and 21 of the glass bulb on the center side edge 20a and 21 a of the glass valve It is located at the center side, and the £ gray gap G between the edge 30a, 31a and the edge 20a, 21a is 1.0 [mm] to 2.0 [mm].
  • the holding pieces 52a, 52b, 53a, 53b of the lamp holder 52, 53 are shown.
  • the width H is also designed to be wide according to the length F of the sleeves 30, 31. With this configuration, the attachment of the sleeves 30, 31 to the lamp holder 52, 53 is improved, and the contact resistance between the sleeves 30, 31 and the lamp holders 52, 53 is reduced.
  • the emitter 40 is made of cesium sulfate, which is a relatively small work function.
  • cesium sulfate which is a relatively small work function.
  • the emitter 40 is not limited to one composed of cesium sulfate, but a cesium compound having a relatively small work function and a low surface barrier necessary for the electrons in the solid to separate out of the solid is preferable.
  • cesium compounds other than cesium sulfate cesium molybdate, cesium aluminate, cesium niobate, cesium tungstate, cesium oxide, cesium hydroxide and the like can be used.
  • Materials other than cesium compounds include alkaline earth metals (magnesium, calcium, strontium, and sodium), oxides of alkaline earth metals, alkali metals (lithium, sodium, potassium, cesium), and oxides of alkali metals.
  • Electron-emitting substances lanthanum, yttrium, lanthanum barium, carbon
  • the emitter 40 is cylindrically provided on the inner surface of one end 12 of the glass bulb 10. Specifically, it is provided at a position closer to the center of the glass bulb than the end 30a of the sleeve 30 on the center side of the glass bulb, and the distance I between the end 30a and the emitter 40 is 5 mm, for example. ].
  • This position is a position where the electric field strength is high enough to induce ion bombardment at startup. Since the emitter 40 is provided at such a position, secondary electrons are easily generated in the glass bulb 10 at the time of start-up. Therefore, the dark startability is good even when the intensity of the electric field generated in the glass bulb 10 is low due to the sleeves 30 and 31 where fine discharge easily starts in the glass bulb 10 and becomes obstructive.
  • the distance I between the edge 30 a and the emitter 40 is not limited to the above. It is preferable to place the light emitter 40 at a position where the distance I at which the electric field is strongest is 0 [mm], since the electric field becomes weaker as the force of the edge 30a is also released! /. More specifically, when the cold cathode discharge lamp 1 is attached to the lighting device 50, the emitter 40 is provided so as to be located between the adjacent conductor and the electrodes 20, 21.
  • the proximity conductor is a conductor which is disposed in the vicinity of the cold cathode discharge lamp 1 and electrically insulated from the lamp current path to assist the starting.
  • the bottom plate 51 of the lighting device 50 corresponds to that.
  • the cold cathode discharge lamp 1 as described above is operated at an operating frequency of 40 [kHz] to 120 [kHz] and a lamp current of 3 to 5 [mA].
  • FIG. 5 is a diagram for explaining the electric field strength between the electrode and the metal conductor.
  • the distance L2 between the sleeve 30 and the bottom plate 51 is smaller than the distance L1 between the electrode 20 and the bottom plate 51 as a proximity conductor. Becomes shorter.
  • the electrode 20 and the sleeve 30 are electrically connected, they have the same potential. Therefore, the electric field E generated between the electrode 20 and the bottom plate 51 has a lower electric field strength than the electric field E generated between the sleeve 30 and the bottom plate 51.
  • the edge 30a of the glass bulb center side of the sleeve 30 is closer to the edge 20a of the glass bulb center side of the electrode 20
  • the glass bulb is located on the center side of the glass bulb, and the entire electrode 20 is housed in the sleeve 30. Therefore, the on-orbit electric field E reaching the shortest distance from the bottom plate 51 to the electrode 20 while avoiding the sleeve 30 has a lower electric field strength as the distance is increased to avoid the sleeve 30.
  • the emitter 40 is not provided at a position where the electric field strength is high enough to induce ion bombardment at the time of start-up, so secondary electrons are generated in the glass bulb 10 at start-up. Under the situation where the difficult electric field strength is low, it was difficult to start microdischarge.
  • the emitter 40 is provided on the track that reaches the electrode 20 at the shortest distance from the bottom plate 51 while avoiding the sleeve 30, and the position is the start Since the electric field strength is high enough to induce ion bombardment at times, the startability under dark conditions is improved even under conditions where the electric field strength at which secondary electrons are easily generated in the glass bulb 10 is low. Do. ⁇ About the black start characteristic>
  • the conventional cold cathode discharge lamp 2000 as shown in FIG. 1 has poor dark startability, particularly when the metal sleeve 2002 covers and hides the entire electrode 2004 as shown by the two-dot chain line 2006.
  • the dark start characteristic is so bad that it is difficult. Since this was confirmed by experiments, it will be explained below.
  • FIG. 6 is a cross-sectional view showing a conventional discharge lamp used for the experiment of dark start characteristics.
  • FIG. 7 shows the effect of the sleeve on the dark start characteristics.
  • the lamp 2100 used in the experiment is that the electrodes 2120 and 2121 are cylindrical bottomed hollow electrodes and the emitter 2140 is provided on the outer surface of the electrode 2120, and a sleeve 2130 , 2131 basically have the same configuration as the lamp 1 according to the present embodiment, except that the lengths in the tube axis X direction of 2131 are different. Therefore, the lower two digits of this embodiment are assigned the same reference numerals as in the present embodiment, and the description thereof will be omitted.
  • the lamp 2100 used in the experiment has a total length of 617 [mm].
  • Glass bulb 2110 has an inner diameter of 2 [4 mm] and an outer diameter of 3 [3 0 [mm], and a gas pressure of 60 Torr inside is a neon 'argon mixed gas (Ne 95 [%] + Ar 5 [% ] Is enclosed.
  • the electrodes 2120 and 2121 are made of nickel and have a length of 5.5 [mm] in the direction of the tube axis X, an outer diameter of 2.1 [mm], and an inner diameter of 1.8 [mm].
  • the inner leads 2122a and 2123a have a length of 3 mm in the tube axis X direction.
  • the emitter 2140 has a length K in the tube axis X direction of 1.6 [mm] and a tube axis X direction from the center edge of the glass bulb to the edge 2120a of the glass bulb center side of the electrode 2120.
  • Distance M is 0.5 [mm].
  • the lamp 2100 having a length of 7 ⁇ 2 [mm] in the tube axis X direction of the sleeves 2130 and 2131 is the edge 2120a and 2121a of the glass bulb center side of the electrodes 2120 and 2121.
  • 0 [mm] is located on the center side of glass bulb, and part of the electrodes 2120, 2121 are sleeves 213 0, 2131 I'm jumping out to IJ.
  • lamp 2100 or electrodes 2120, 2121 glass non-ref, edge of the central line 2120a, 2121a and the edge of the center of the glass bulb on the sleeves 2130 and 2131 are at substantially the same position. Sleep, 2130, 2131 tube length X direction length power 11.
  • lamp 2100 (or, sleep, 2130, 2131 glass non-ref, the edge of the central ridge J 2120a, 2121a electrode 2120, It is located in the center of the glass bulb 2.00 mm from the edge of the center of the glass bulb 2121 and is housed in the sleeve 2130, 2131 of the whole of the electrodes 2120, 2121.
  • the emitter scatters due to ion bombardment at startup, and the scattered material and mercury react to form an amalgam, and the amalgam blackens the inner surface of the glass bulb, and the luminous flux of the lamp is lost.
  • the emitter be provided closer to the sealing portion.
  • the configuration of the cold cathode discharge lamp 1 according to the present embodiment is not limited to the above configuration.
  • the configuration as shown in the first to seventh modifications can be considered.
  • the cold cathode discharge lamp according to Modifications 1 to 13 basically has the same configuration as the cold cathode discharge lamp 1 of the present embodiment. Therefore, the description of the common parts is simplified, and only the different parts are described in detail.
  • FIG. 8 is an enlarged cross-sectional view showing one end of a cold cathode discharge lamp according to Modification 1.
  • the cold cathode discharge lamp 100 shown in FIG. 8 is largely different from the cold cathode discharge lamp 1 according to the present embodiment in that the sleeve 130 is formed of a solder layer formed on the outer surface of the glass bulb 110.
  • the configuration of the other parts is substantially the same as that of the cold cathode discharge lamp 1.
  • the cold cathode discharge lamp 100 has a glass bulb 110 having a phosphor layer 116 formed on its inner surface, and An electrode 120 disposed in an end 112 of the glass bulb 110, a sleeve 130 provided on the outer periphery of the end 112, and an emitter 140.
  • the electrode 120 is electrically connected to the sleeve 130 via a lead wire 122 composed of an inner lead wire 122 a and an outer lead wire 122 b sealed in a sealing portion 114.
  • the sleeve 130 has a cap shape including a joint portion 131 joined to the external lead wire 122 b and a thin film portion 132 as a portion other than the joint portion 131, and the end portion 112 of the glass bulb 110
  • the end surface 112 is provided so as to cover the end 112.
  • the sleeve 130 is electrically connected to a lamp holder (not shown) that holds the end 112 of the cold cathode discharge lamp 100 when the cold cathode discharge lamp 100 is attached to a lighting device (not shown). Then, power is supplied from the lighting circuit of the lighting device through the lamp holder (not shown).
  • the joint portion 131 is a portion where the sleeve 130 is electrically connected to the lead wire 122. Since the joint portion 131 has a substantially conical shape in appearance, the area of the outer surface is small although the entire outer surface of the outer lead wire 122 b is completely covered. Therefore, the temperature of the lead wire 122 is less likely to decrease because the heat radiation effect to reduce the area of the outer surface of the sleeve 130 is also small.
  • the outer lead wire 122 b since the outer lead wire 122 b is completely covered with the sleeve 130, the outer lead wire 122 b may be bent or stress may be applied to the outer lead wire 122 b to damage the sealing portion 114. There is little risk of doing it.
  • the material forming the sleeve 130 is not limited to solder, and it may be a material having at least conductivity. However, it is preferable that the material has a low thermal conductivity so that the heat radiation effect of the sleeve 130 does not increase.
  • solder is suitable as the material of the sleeve 130 because it has low thermal conductivity with good conductivity and low cost.
  • a solder containing tin (Sn), tin-indium (In) alloy, tin-bismuth (Bi) alloy or the like as a main component is more preferable because a sleeve 130 having high mechanical strength can be formed.
  • solder antimony (Sb), zinc (Zn), aluminum (A1), gold (Au), silver (Ag), copper (Cu), iron (Fe), platinum (Pt) and palladium (Pd).
  • Sb antimony
  • Zn zinc
  • Al aluminum
  • Au gold
  • silver Ag
  • Cu copper
  • Fe iron
  • Pt platinum
  • palladium Pd
  • the solder to which at least one of the above is added is more preferable because it can form the sleeve 130 which is less likely to be peeled off from the glass bulb 110 because it is well compatible with the glass.
  • lead-free solder is environmentally friendly It is preferable because the cathode discharge lamp 100 can be manufactured.
  • the material forming the sleeve 130 is compatible with tungsten, it is also conceivable to make the outer lead wire 122 b of tungsten. That is, it can be considered that the entire lead wire 122 is formed by tandasten. By doing so, disconnection defects of the lead wire 122 can be reduced and the cost of parts can be reduced.
  • the sleeve 130 can be formed by a well-known date method (e.g., JP-A 2004-146351).
  • the method of forming the sleeve 130 by the dicing method is briefly described, for example, by immersing the end portion 112 of the glass bulb 110 in which the electrode 120 is sealed into molten solder in a melting tank. When immersing the end portion 112 in the molten solder, an ultrasonic wave may be applied.
  • Such a de-tubbing method can form the sleeve 130 simply and inexpensively, so the cold cathode discharge lamp 100 can be manufactured inexpensively.
  • the sleeve 130 may be formed by a method other than the dating method. For example, it may be formed by vapor deposition, plating, etc.
  • the outer surface of the sleeve 130 is considered to be covered with a conductive and low thermal conductivity material.
  • a conductive and low thermal conductivity material For example, it is conceivable to cover the outer surface with a cylindrical member made of tantalum. Thereby, the sleeve can be made difficult to peel off.
  • the electrode 120 is rod-shaped, the present invention is not limited to this, and the electrode 120 may have a bottomed cylindrical or flat plate shape.
  • FIG. 9 is an enlarged cross-sectional view showing one end of a cold cathode discharge lamp of Modification 2.
  • the cold cathode discharge lamp 200 shown in FIG. 9 is largely different from the cold cathode discharge lamp 1 according to the present embodiment in that an auxiliary emitter 241 is provided on the outer surface of the electrode 220, and the other parts
  • the configuration of the lamp is substantially the same as that of the cold cathode discharge lamp 1 described above.
  • the cold cathode discharge lamp 200 is provided on a glass bulb 210 having a phosphor layer 216 formed on the inner surface, an electrode 220 disposed in the end 212 of the glass bulb 210, and an outer periphery of the end 212.
  • the sleeve 230, the emitter 240 having substantially the same configuration as the emitter 40 according to the present embodiment, and the emitter 240 have a pair of auxiliary emitters 241.
  • the electrode 220 is electrically connected to the sleeve 230 via a lead wire 222 consisting of an inner electrode 222 a and an outer electrode 222 b sealed in a sealing portion 214 and a bonding portion 232.
  • the auxiliary emitter 241 is provided on the outer periphery of the electrode 220, and is made of, for example, the same material as the emitter 240.
  • the edge 241 a on the center side of the glass bulb of the auxiliary emitter 241 is provided closer to the sealing portion 214. In the vicinity where the emitter 241 is provided, blackening occurs due to a large amount of cesium ions released by ion bombardment at the start, so that the blackening does not affect the brightness of the cold cathode discharge lamp 200 as much as possible. It is preferable to provide the edge 241 a near the seal portion 214 which hardly affects.
  • the electrode 220 is in the shape of a rod, but is not limited to this and may be in the shape of a bottomed cylinder or a flat plate.
  • FIG. 10 is an enlarged cross-sectional view showing one end of a cold cathode discharge lamp according to a third modification.
  • the cold cathode discharge lamp 300 shown in FIG. 10 relates to the present embodiment in that the electrode 320 is a bottomed cylindrical hollow electrode and the emitter 340 is provided on the inner surface of the electrode 320.
  • the configuration is largely different from that of the cold cathode discharge lamp 1, and the configuration of the other parts is substantially the same as that of the cold cathode discharge lamp 1.
  • the cold cathode discharge lamp 300 includes a glass bulb 310 having a phosphor layer 316 formed on the inner surface, a bottomed cylindrical electrode 320 disposed in an end portion 312 of the glass bulb 310, and the end portion It comprises a sleeve 330 provided on the outer periphery of 312, and an emitter 340 provided on the inner surface of the cylinder of the electrode 320.
  • the electrode 320 is electrically connected to the sleeve 330 via a lead wire 322 consisting of an inner electrode 322 a and an outer electrode 322 b sealed in a sealing portion 314 and a bonding portion 332.
  • Electrode 320 is made of nickel (Ni), and the overall length of the cylindrical portion is 5 ⁇ 2 mm, the outer diameter is 2 ⁇ 7 mm, the inner diameter is 2 ⁇ 3 mm, and the wall thickness is It is 0 ⁇ 2 [mm].
  • the electrode 320 is not limited to nickel, and may be made of, for example, niobium (Nb), tantalum (Ta), molybdenum (Mo), or tandasten (W).
  • the electrode 320 is disposed so that the tube axis of the tube and the tube axis of the glass bulb 310 substantially coincide, and the distance between the outer peripheral surface of the tube and the inner surface of the glass bulb 310 is the same as that of the tube. It is almost uniform over the entire circumference. Specifically, the distance between the outer peripheral surface of the cylindrical portion and the inner surface of the glass bulb 310 is 0.15 mm. Because the interval is thus narrowed, the interval The discharge does not enter the gap, and the discharge occurs only inside the electrode 320. Therefore, the cold cathode discharge lamp 300 in which the sputtered material scattered by the discharge is difficult to adhere to the inner surface of the glass bulb 310 has a long life. As described above, by making the electrode 320 a single electrode, the electrode force can also reduce sputtering to the inner surface of the glass bulb, and mercury consumption can be reduced.
  • the discharge is less likely to go to the lead wire 322 side, the lead wire 322 is less likely to be heated by the discharge, and the cold cathode discharge lamp 300 can have a long life.
  • the distance between the outer peripheral surface of the cylindrical portion of the electrode 320 and the inner surface of the glass bulb 310 does not necessarily have to be 0.15 mm, but in order to prevent the discharge from entering, the distance is 0. It is preferable that it is 2 [mm] or less.
  • the emitter 340 is provided over the entire inner surface of the cylinder of the electrode 320 using the same material as that of the emitter 40 according to the present embodiment.
  • the emitter 340 may not necessarily be provided over the entire area of the inner surface of the cylinder but may be provided on a part of the inner surface. Since the emitter 340 is provided on the inner surface of the electrode 320, blackening of the inner surface of the glass bulb 310 due to cesium ions is unlikely to occur.
  • FIG. 11 (a) is an enlarged plan view showing one end of the cold cathode discharge lamp of Modification 4
  • FIG. 11 (b) is a cross-sectional view taken along the line aa shown in FIG. 11 (a)
  • FIG. FIG. 18 is a perspective view showing a sleeve of Modification 4;
  • the cold cathode discharge lamp 400 shown in FIGS. 11 (a) and 11 (b) has a slit 431 formed in the sleeve 430 for improving the electric field strength between the electrode 420 and the adjacent conductor (not shown).
  • the configuration is largely different from the cold cathode discharge lamp 1 according to the present embodiment, and the configuration of the other parts is substantially the same as that of the cold cathode discharge lamp 1.
  • the cold cathode discharge lamp 400 is provided on a glass bulb 410 having a phosphor layer 416 formed on the inner surface, an electrode 420 disposed in the end 412 of the glass bulb 410, and an outer periphery of the end 412. And an emitter 440 provided on the inner surface of the glass bulb 410.
  • the electrode 420 is electrically connected to the sleeve 430 via a lead wire 422 formed of an inner electrode 422a and an outer electrode 422b and a joint portion 432.
  • the emitter 440 is slightly wider than the slit 431 in the radial direction of the glass bulb 410, and provided at a position facing the slit 431. Ru.
  • the emitter 440 may be provided in a tubular shape over the entire circumference of the glass bulb 410 in the radial direction.
  • the emitter 440 may be provided, for example, in a tubular shape on the outer surface of the electrode 420 in accordance with the position of the slit 431.
  • the shape of the electrode 420 is not limited to a rod, but may be a bottomed cylindrical or flat plate, but the outer surface in the case of a bottomed cylindrical is the outside of the electrode 420.
  • the sleeve 430 is a cylinder having a substantially C-shaped cross section, has a slit 431, and is attached to the outer periphery of the end 412 so as to be fitted around the end 412 of the glass bulb 410.
  • the slit 431 also has a function of improving the electric field strength between the electrode 420 and the proximity conductor (not shown). That is, in the slit 431 according to the fourth modification, first, even if a slight dimensional error occurs between the inner diameter of the sleeve 430 and the outer diameter of the glass bulb 410 as in the slit 30a according to the present embodiment.
  • the inner surface of the sleeve 430 is in close contact with the outer surface of the glass bulb 410.
  • the electrode 420 sandwiching that portion It has a function to increase the electric field strength between adjacent conductors.
  • the slit 431 is wider than the slit 30a according to the present embodiment, and the slit shown in FIG. 11 (c) is about 1/6 of the outer circumference of the glass bulb 410, for example, the outer diameter 4 [4]. [mm] For the glass bulb 410 (inner diameter 3 [mm]), it is about 2 [mm].
  • the slits are not limited to the above, they may not be wide enough to sufficiently increase the electric field strength, and may be 1/3 or more of the outer circumference of the glass valve 410, for example, 4 mm in outside diameter In the case of the glass valve 410 of [mm], it is preferable that it is 4 [mm] or more.
  • the emitter 440 is provided on the inner surface of the portion of the glass bulb 410 where the sleeve 430 is not provided on the outer periphery, that is, on the inner surface of the portion where the slit 431 is located on the outer periphery. Ru. When the emitter 440 is thus provided at a position where the electric field strength is high, secondary electrons are likely to be generated in the glass bulb 410 at startup.
  • the emitter 440 is not limited to the case where it is provided on the inner surface of a partial region in the portion where the slit 431 is located on the outer periphery, It may be provided on the inner surface of all the regions in the portion where 431 is located. In addition, it may be provided on the inner surface of the portion other than the portion where the slit 431 is located at the outer periphery of the partial force of the emitter 440.
  • the sleeve 430 is not limited to a cylindrical body having a substantially C-shaped cross section, and is provided with a slit 431 in a cylindrical body having a substantially triangular, substantially rectangular cross section, or an oval. It is also good. Further, the shape of the slit 431 is not limited to the linear shape as shown in FIG. 11, and may be a curved shape or a bent shape.
  • FIG. 12 (a) is an enlarged plan view showing one end of the cold cathode discharge lamp of the fifth modification
  • FIG. 12 (b) is a cross sectional view along line b-b shown in FIG. 12 (a)
  • FIG. FIG. 18 is a perspective view showing a sleeve of Modification 5;
  • cold cathode discharge lamp 500 has a cutaway portion 531 formed in sleeve 530 for improving the electric field strength between electrode 520 and a proximity conductor (not shown).
  • the point is largely different from the cold cathode discharge lamp 1 according to the present embodiment, and the configuration of the other parts is substantially the same as the cold cathode discharge lamp 1.
  • the cold cathode discharge lamp 500 has a glass bulb 510 having a phosphor layer 516 formed on the inner surface, an electrode 520 disposed in the end 512 of the glass bulb 510, and a sleeve provided on the outer circumference of the end 512 And an emitter 540 provided on the inner surface of the glass bulb 510.
  • the electrode 520 is electrically connected to the sleeve 530 via the lead wire 522 and a joint portion (not shown).
  • the sleeve 530 is a cylindrical body having a circular cross section, and has a notch 531, and is attached to the outer periphery of the end 512 so as to be externally fitted to the end 512 of the glass bulb 510.
  • the cutaway portion 531 has a function to improve the electric field strength between the electrode 520 and the proximity conductor (not shown).
  • the notch 531 has, for example, a length of 5 [axial direction of the glass bulb 510]. mm], radial length is 2 mm.
  • the electric field strength between the electrode 520 and the adjacent conductor sandwiching the portion is increased.
  • the opening area of the notch portion 531 be 10 mm 2 or more.
  • FIG. 13 is a perspective view showing a modified example of the sleeve.
  • the notch 551 of the sleeve 550 can increase the opening area by widening the radial width of the glass bulb 510.
  • attachment to the glass bulb 510 can be facilitated.
  • the emitter 540 is provided on the inner surface of the portion of the glass bulb 510 where the sleeve 530 is not provided on the outer periphery, that is, on the inner surface of the portion where the notch portion 531 is located on the outer periphery. When the emitter 540 is thus provided at a position where the electric field strength is high, secondary electrons are likely to be generated in the glass bulb 510 at startup.
  • the emitter 540 is not limited to the case where the emitter 540 is provided on the inner surface of a part of the area where the notch 531 is located on the outer periphery, as shown in FIGS. 12 (a) and 12 (b). It may be provided on the inner surface of all the regions in the portion where the notch 531 is located at the outer periphery.
  • the partial force of the emitter 540 may be provided on the inner surface of the portion other than the portion where the notch portion 531 is located, for example, the cylindrical shape may be provided over the entire circumference of the glass bulb 510 in the radial direction. Good.
  • the emitter 540 may be provided on the outer surface of the electrode 520, for example, in a tubular shape in accordance with the position of the notch portion 531.
  • the shape of electrode 520 is not limited to a rod, but may be a bottomed cylindrical or flat plate, but the outer surface in the case of a bottomed cylindrical is the outer surface of electrode 520.
  • the sleeve 530 is not limited to a cylindrical body having a circular cross section, and the cutaway portion 531 may be provided in a polygonal or elliptical cylindrical body having a substantially triangular or substantially square cross section.
  • the shape of the cutaway portion 531 is not limited to a square as shown in FIG. It may be circular, oval or the like.
  • FIG. 14 is an enlarged cross-sectional view showing one end of a cold cathode discharge lamp of Modification 6.
  • the edge 620 a of the electrode 620 on the center side of the glass bulb is positioned closer to the center of the glass bulb than the edge 630 a of the center side of the glass bulb of the sleeve 630.
  • the cold cathode discharge lamp 1 according to the present embodiment is largely different from the cold cathode discharge lamp 1 according to the present embodiment in that it is provided at a position where the positional relationship is taken into consideration. It is almost the same.
  • the cold cathode discharge lamp 600 is provided on the outer periphery of the end 612, a glass bulb 610 having a phosphor layer 616 formed on the inner surface, an electrode 620 disposed in the end 612 of the glass bulb 610, and And an emitter 640 provided on the inner surface of the glass bulb 610.
  • the electrode 620 is electrically connected to the sleep 630 via the inner lead 622 a and the outer lead spring 622 b force, the lead spring 622 and the junction 632 sealed to the sealing portion 614. .
  • the emitter 640 is closer to the sealing portion 614 than the edge 620a on the center side of the glass bulb of the electrode 620 and is glass than the edge 630a on the center side of the glass bulb of the sleeve 630. It is provided at the center of the valve.
  • the sealed portion 614 side of the edge 620 a on the center side of the glass bulb of the electrode 620 is out of the main light emitting area of the lamp. Therefore, even if an emitter 640 is provided there, the emitter 640 is scattered by ion bombardment at start-up, the scattered matter and mercury react to form amalgam, and the amalgam blackens the inner surface of the glass bulb 610, and the lamp Problems such as loss of luminous flux are unlikely to occur.
  • an emitter 640 is provided there.
  • secondary electrons are likely to be generated in the glass bulb 610 at startup.
  • the axial length of the glass bulb 610 in the sleeve 630 is preferably 19 mm or less depending on the thickness of the sleeve 630. Furthermore, the central portion of the glass bulb is closer to the central portion of the glass bulb than the edge 620a of the electrode 620, and the light emission region that is the main component of the lamp is Therefore, in consideration of the loss of light flux by the sleeve 630, it is more preferable that the length of the sleeve 630 is equal to or less than 10 0 mm. Further, in order to minimize the heat radiation from the sleeve 630, the length of the sleeve 630 which is preferably made as small as possible is preferably 19 mm or less.
  • the electrode 620 is in the shape of a rod, but is not limited to this, and may be in the shape of a bottomed cylinder or a flat plate.
  • FIG. 15 is an enlarged cross-sectional view showing one end of a cold cathode discharge lamp according to Modification 7.
  • the edge 720 a of the electrode 720 on the center side of the glass bulb is positioned closer to the center of the glass bulb than the edge 730 a of the glass bulb on the center side of the sleeve 730.
  • the cold cathode discharge lamp 1 according to the present embodiment is largely different from the cold cathode discharge lamp 1 according to the present embodiment in that it is provided at a position where the positional relationship is taken into consideration. It is almost the same.
  • the cold cathode discharge lamp 700 is provided on a glass bulb 710 having a phosphor layer 716 formed on the inner surface, an electrode 720 disposed in an end 712 of the glass bulb 710, and an outer periphery of the end 712. And an emitter 740 provided on the outer periphery of the electrode 720.
  • the electrode 720 is electrically connected to the sleeve 730 via a lead wire 722 that also serves as an inner electrode 722 a and an outer electrode 722 b, which are sealed in the sealing portion 714, and a bonding portion 732.
  • the emitter 740 is provided on the outer surface of the electrode 720 at a position closer to the center of the glass bulb than the edge 730 a on the center of the glass bulb of the sleeve 730. Since the electric field strength between the electrode 720 and the proximity conductor (not shown) is higher at the center of the glass bulb than the edge 730a at the center of the glass bulb of the sleeve 730, if an emitter 740 is provided there, the glass bulb is started at startup. Secondary electrons are likely to be generated in Lube 710.
  • the emitter 740 scatters due to ion bombardment at startup, and the scattered material and mercury react to form gum gum, and the inside of the glass bulb 710 is blackened by the amalgam, and the luminous flux of the lamp is lost. It is preferable to provide the emitter 740 on the side of the sealing portion 714 in order to make the problem less likely to occur.
  • the axial length of the glass bulb 710 of the sleeve 730 is, for example, 7.5 [mm].
  • the length S of the sleeve 730 is preferably 19 mm or less depending on the thickness of the sleeve 730.
  • the length of the sleeve 730 is taken into consideration
  • the length is more preferably 10 mm or less.
  • the length of the sleeve 730 be as small as 19 mm or less.
  • the electrode 720 is in the shape of a rod, but is not limited to this and may be in the shape of a bottomed cylinder or a flat plate.
  • FIG. 16 (a) is a front view showing one end of the cold cathode discharge lamp of Modification 8
  • FIG. 16 (b) is a side view of Modification 8
  • FIG. 16 (c) is a circle shown in (a). It is an expanded sectional view of a portion.
  • the cold cathode discharge lamp 800 shown in FIGS. 16 (a) and 16 (b) is substantially the same as the cold cathode discharge lamp 1 according to the present embodiment in that a metal mesh is used for the sleeve 830.
  • the configuration of the other parts is substantially the same as that of the cold cathode discharge lamp 1. Therefore, only the difference will be described, and the description of the other components will be omitted.
  • the cold cathode discharge lamp 800 comprises a glass tube 810, an electrode (not shown) disposed inside at least one end 812 of the glass bulb 810, and the electrode and the lead on the outer periphery of the end 812. And a sleeve 830 as a metallic conductor electrically connected via a wire 822.
  • the sleeve 830 includes a main body 831, a sandwiching portion 832 and a conductive portion 833.
  • the lamp holder holds the end portion 812 of the cold cathode discharge lamp 800 when the cold cathode discharge lamp 800 is attached to a lighting device (not shown). It is electrically connected to (not shown).
  • the main body 831 is a cap-like member that covers the outer periphery of the end 812 and is made of a metal mesh.
  • the mesh of the main body portion 831 preferably has a wire diameter of 5 m] to 120 m] and an eye opening of 0.1 mm to 3 mm.
  • the main body 831 has good conductivity.
  • the holding portion 832 is a cylindrical body having a C-shaped cross section fixed by welding or the like to the inside of the opening of the main body 831 and has a role of holding the glass bulb 810 and fixing the main body 831 to the glass bulb 810. Play.
  • the inner diameter of the holding portion 832 is designed to be slightly smaller than the outer diameter of the end portion 812, and when attaching the sleeve 830 to the end portion 812, the end portion 812 pushes the holding portion 832 from inside. And push the end 812 into the main body 831.
  • the clamping portion 832 clamps the end 812 from the outside with a force to return to its original shape, and the force fixes the main body 831 to the glass bulb 810.
  • the conductive portion 833 is provided on the side opposite to the opening side of the main body portion 831 so as to be in contact with both the main body portion 831 and the lead wire 822, and the main body portion 831 and the lead It plays a role of electrically connecting the wire 822. Also, it serves as a stop to prevent the main body 831 from coming off the end 812.
  • the conductive portion 833 has a disk shape having a hole 833a for passing through the external lead spring 822b of the lead spring 822 in the center.
  • the hole 833a has a bowl shape in which the main body side becomes larger in diameter toward the main body side, and the external lead wire 822b and the inner lead wire 822a Welded part 822c is stored.
  • the conductive portion 833 is formed of conductive rubber, and when the temperature of the sleeve reaches about 140 ° C., the conductive portion 833 melts, and the main portion 831 and the lead wire 822 become insulated. . Therefore, even if the sleeve 830 is heated to a high temperature due to an overcurrent, for example, when it is mounted on a lighting device such as a backlight unit, the resin member such as an optical sheet is prevented from being deformed by the heat. it can.
  • the electrode and the proximity conductor sandwiching the portion Function to increase the electric field strength between
  • FIG. 17 is a front view showing one end of a cold cathode discharge lamp according to Modification 9.
  • the cold cathode discharge lamp 850 shown in FIG. 17 has a force S which largely differs from the cold cathode discharge lamp 1 according to the present embodiment in that the sleeve 880 has a coil shape, and the configuration of the other parts is the above. It is almost the same as the cold cathode discharge lamp 1. Therefore, only the above differences will be explained.
  • the cold cathode discharge lamp 850 includes a glass non-reve 860, an electrode (not shown) disposed inside of at least one end 862 of the glass bulb 860, and the electrode and the lead on the outer periphery of the end 862. And a sleeve 880 as a metal conductor electrically connected via a wire 872.
  • the sleeve 880 is formed by bending a single metal wire into a coil and is wound around the main body portion 881 wound around the end 862 of the glass bulb 860 and the lead wire 872. And a connection portion 882.
  • the metal wire has a diametrical force ⁇ 120 [111] before attaching to the end 862 of the glass bulb 860, and the main body 881 has a mandrel diameter of 0 ⁇ 8 [mm] ⁇ 3 ⁇ 8 [mm]
  • the pitch length is 0.1 mm to 3 mm
  • the connection portion 882 has a mandrel diameter of 0.3 mm to 0.7 mm and a pitch length of 0 mm.
  • the sleeve 880 is in a coil shape, and the portion of the glass bulb 860 where the sleeve 880 is not provided on the outer periphery, ie, a portion where the sleeve 880 is not interposed between the electrode and the proximity conductor, It has a function to increase the electric field strength between the electrode and the neighboring conductor that sandwich the part. In order to obtain good dark start characteristics, it is preferable that the pitch of the coil of the main body portion 881 be in the above range. Also, in order to obtain good conductivity, the main body portion 881 is preferably made of a metal wire such as iron and nickel alloy.
  • the mandrel diameter of the main body portion 881 is designed to be slightly smaller than the outer diameter of the glass bulb 860
  • the mandrel diameter of the connection portion 882 is designed to be slightly smaller than the outer diameter of the lead wire 872.
  • a sleeve 880 is secured to the glass bulb 860 by the force that the 881 clamps the glass bulb 860 and the force that the connection 882 clamps the lead wire 872.
  • the lead wire 872 and the connection portion 882 may be welded or bonded with a conductive adhesive! /.
  • FIG. 18 (a) is a front view showing one end of the cold cathode discharge lamp of Modification 10.
  • FIG. 18 (b) is a perspective view showing a sleeve of Modification 10.
  • the cold cathode discharge lamp 900 shown in FIGS. 18 (a) and 18 (b) is largely different from the cold cathode discharge lamp 1 according to the embodiment of the present invention.
  • the configuration of the other parts is substantially the same as that of the cold cathode discharge lamp 1 described above. Therefore, only the above differences will be described, and descriptions of other components will be omitted.
  • the cold cathode discharge lamp 900 comprises a glass nanoreve 910, an electrode (not shown) disposed inside of at least one end 912 of the glass bulb 910, and the electrode and lead on the outer periphery of the end 912. And a cylindrical sleeve 930 as a metal conductor electrically connected via a wire 922.
  • the sleeve 930 In the sleeve 930, one force point on the outer peripheral surface is punched into a substantially U-shape, and a slit portion 931 for taking light into the end 912 of the punched part force glass valve 910 is punched. The remaining three sides form a clip portion 932 for fixing the partial force sleeve 930 surrounded by the slit portion 931 to the glass bulb 910.
  • the sleeve 930 is not interposed between the electrode and the adjacent conductor! It has a function to increase the electric field strength between the sandwiching electrode and the adjacent conductor.
  • the substantially U-shaped punching portion is not limited to one power point, and may be provided at a plurality of places.
  • Restriction pieces 933 a to 933 e are provided on the lead wire side edge of the sleeve 930, and when the sleeve 930 is attached to the glass bulb 910, the restriction pieces 933 a to 933 e are the ends of the glass bulb 930.
  • the sleeve 930 is positioned such that the portion 912 abuts.
  • the sleeve 930 has a conductive portion 934 at the end of the lead wire 922 side for electrically connecting the sleeve 930 and the lead wire 922.
  • the conductive portion 934 is in the form of a long plate made of bimetal, and has a narrow bent portion 934a extended at the end edge on the lead wire 922 side, and a width provided at the tip of the bent portion 934a.
  • the contact portion 934b is formed in a substantially V-shape so as to sandwich the lead wire 922.
  • the conductive portion 934 is formed by bending the bending portion 934a so that the contact portion 934b and the lead wire 922 are in contact.
  • the bending portion 934a When the temperature of the sleeve 930 reaches approximately 140 ° C., the bending portion 934a The contact portion 934b is separated from the lead wire 922 so that the contact portion 934b is in a force S-insulated state with the sleeve 930 and the lead spring 922. Therefore, even if overcurrent flows and the sleeve 930 becomes hot, for example, when mounted on a lighting device such as a backlight unit, light It is possible to prevent the resin member such as the medical sheet from being deformed by the heat.
  • Conductive portion 934 does not necessarily have to be made of bimetal and may have a configuration that does not deform. In that case, the contact portion 934 b and the lead wire 922 may be welded.
  • FIG. 19 is an enlarged cross-sectional view showing one end portion of the cold cathode discharge lamp of the modified example 11.
  • the cold cathode discharge lamp 1000 shown in FIG. 19 is substantially the same as the cold cathode discharge lamp 1 according to the present embodiment except that the configuration of the sleeve 1030 is different. Therefore, only the configuration of the sleeve 1030 will be described in detail, and the description of the other configurations will be simplified.
  • the cold cathode discharge lamp 1000 is provided with a glass bulb 1010 having a phosphor layer 1016 formed on the inner surface, an electrode 1020 disposed in the end 1012 of the glass bulb 1010, and the end It comprises a sleeve 1030 and an emitter 1040 provided on the inner surface of the glass bulb 1010.
  • the electrode 1020 is electrically connected to the sleeve 1030 via a lead 1022 composed of an inner lead 1022 a and an outer lead 1022 b sealed in a sealing portion 1014.
  • the sleeve 1030 is made of an alloy of iron and nickel, and includes a cap portion 1031 which is a main body, and a thin tube portion 1032 which is extended at the end on the closing side of the cap portion 1031.
  • the material of the sleeve 1030 may be made of phosphor bronze, brass, nickel alloy such as nickel white, etc.
  • the cap portion 1031 is fitted on the end portion 1012 of the glass bulb 1010 so as to cover the outer surface thereof.
  • a gap is provided between the cap portion 1031 and the glass bulb 1010! /, But a gap is provided!
  • An opening 1033 for penetrating the external lead 1022b is provided at the closing end of the cap 1031, and the opening 1033 communicates with the inside of the thin tube 1032.
  • the external lead 1022b is welded to the capillary tube portion 1032 by resistance welding, laser welding or the like in a state of being inserted into the capillary tube portion 1032 from the inside of the cap portion 1031 through the opening 1033 and the welding
  • the part electrically connects the electrode 1020 and the sleeve 1030.
  • the external lead wire 1022 b and the thin tube portion 1032 may be connected by caulking.
  • the sleeve 1030 is electrically connected to a lamp holder (not shown) that holds the end 1012 of the cold cathode discharge lamp 1000 when the cold cathode discharge lamp 1000 is attached to a lighting device (not shown). Ru.
  • the sleeve 1030 may be provided with a slit.
  • the shape of the end portion 1012 of the glass bulb 1010 is likely to vary and dimensional error is likely to occur between the outer diameter of the glass bulb 1010 and the inner diameter of the sleeve 1030. If a slit is provided in the sleeve 1030 while the force is applied, the slit absorbs the dimensional error even if such a dimensional error occurs, and the inner surface of the sleeve 1030 and the outer surface of the glass bulb 1010 are in close contact with each other.
  • the sleeve 1030 can be stably fixed to the end 1012 of the glass bulb 1010 by force S.
  • FIG. 20 is an enlarged cross-sectional view showing one end of the cold cathode discharge lamp of Modification 12.
  • the cold cathode discharge lamp 1100 shown in FIG. 20 is substantially the same as the cold cathode discharge lamp 1 according to the modification 11 except for the shape of the sleeve 1130. Therefore, only the configuration of the sleeve 1130 will be described in detail, and the description of the other configurations will be simplified.
  • the cold cathode discharge lamp 1100 is provided with a glass bulb 1110 having a phosphor layer 1116 formed on the inner surface, an electrode 1120 disposed in the end 1112 of the glass bulb 1110, and the end It comprises a sleeve 1130 and an emitter 1140 provided on the inner surface of the glass bulb 1110.
  • the electrode 1120 is electrically connected to the sleeve 1130 via a lead 1122 formed of an inner lead 1122 a and an outer lead 1122 b sealed in a sealing portion 1114.
  • a sleeve 1130 is externally fitted to the end 1112 of the glass bulb 1110 so as to cover its outer surface.
  • the closing end of the sleeve 1130 is shaped like a mortar so as to reduce in diameter toward the end edge, and an opening 1131 is provided at the end of the smallest diameter.
  • the outer lead wire 1122 b is welded to the sleeve 1130 by resistance welding, laser welding or the like in a state where the tip is inserted into the opening 1131, and the electrode 1120 and the sleeve 1130 are electrically connected by the welded portion. It is connected to the.
  • the sleeve 1130 is opened because the closing end has a mortar shape as described above. Easy to insert external lead 1122b into the mouth 1131!
  • the sleeve 1130 may be provided with a slit.
  • the shape of the end 1112 of the glass bulb 1110 tends to vary, and dimensional errors are likely to occur between the outer diameter of the glass bulb 1110 and the inner diameter of the sleeve 1130. If a slit is provided in the sleeve 1130 under the same force, the slit absorbs the dimensional error even if such a dimensional error occurs, and the inner surface of the sleeve 1130 and the outer surface of the glass bulb 1110 are in close contact with each other.
  • the sleeve 1130 can be stably fixed to the end 1112 of the glass bulb 1110 by force S.
  • FIG. 21 is an enlarged cross-sectional view showing one end portion of the cold cathode discharge lamp of the modification 13.
  • the cold cathode discharge lamp 1200 shown in FIG. 21 is substantially the same as the cold cathode discharge lamp 1 according to the modification 12 except for the shape of the sleeve 1230. Therefore, only the configuration of the sleeve 1230 will be described in detail, and the description of the other configurations will be simplified.
  • the cold cathode discharge lamp 1200 is provided with a glass bulb 1210 having a phosphor layer 1216 formed on the inner surface, an electrode 1220 disposed in the end 1212 of the glass bulb 1210, and the end A sleeve 1230 and an emitter 1240 provided on the inner surface of the glass bulb 1210.
  • the electrode 1220 is electrically connected to the sleeve 1230 via a lead 1222 composed of an inner lead 1222 a and an outer lead 1222 b sealed in a sealing portion 1214.
  • the sleeve 1230 includes a cap portion 1231 which is a main body, and a thin tube portion 1232 which is extended at an end of the cap portion 1231 on the closing side.
  • the cap portion 1231 is externally fitted to the end 1212 of the glass bulb 1210 so as to cover the outer surface thereof.
  • the end on the closing side of the cap portion 1231 has a mortar shape that decreases in diameter toward the end edge, and the end with the smallest diameter is for passing the external lead wire 1222b.
  • An opening 1233 is provided, and the opening 1233 and the inside of the thin tube portion 1232 communicate with each other.
  • the external lead wire 1222b is welded to the capillary tube portion 1232 by resistance welding, laser welding or the like in a state of being inserted into the capillary tube portion 1232 from the inside of the cap portion 1231 through the opening 1233, and the welding The part electrically connects the electrode 1220 and the sleeve 1230 .
  • the external lead wire 1222 b and the thin tube portion 1232 may be connected by caulking.
  • the sleeve 1230 has a mortar-like end as described above, so that the outer lead wire 1222 b can be easily inserted into the opening 1231. Further, since the thin tube portion 1232 is provided, the external lead wire 1222b can be easily connected by welding or caulking.
  • the sleeve 1230 may be provided with a slit.
  • the shape of the end 1212 of the glass bulb 1210 varies, and dimensional errors easily occur between the outer diameter of the glass bulb 1210 and the inner diameter of the sleeve 1230. If a slit is provided in the sleeve 1230, the slit absorbs the dimensional error even if such a dimensional error occurs, and the inner surface of the sleeve 1230 and the outer surface of the glass bulb 1210 are in close contact with each other.
  • the sleeve 1230 can be stably fixed to the end 1212 of the glass bulb 1210 by force S.
  • the discharge lamp according to the present invention is not limited to the above.
  • the discharge lamp according to the present invention may be a discharge lamp obtained by appropriately combining the configurations of the present embodiment and the first to thirteenth modifications.
  • the discharge lamp according to the present invention is not limited to a cold cathode discharge lamp.
  • the emitter may be provided on both end sides not only on one end side of the glass bulb. Furthermore, the following modifications may be considered.
  • the glass which is the material of the glass bulb
  • a transition metal oxide in a predetermined amount according to the type.
  • the composition ratio is not less than 0. 05 [mol%].
  • the composition ratio of cerium oxide is more than 0.5 [mol%]
  • the glass will be colored, so the composition ratio of cerium oxide is more than 0 ⁇ 05 [mol%] 0 ⁇ 5 [mol%] It is preferable to dope in the following range.
  • the cerium oxide should be doped to a composition ratio of 5.0 [mol%] or less. Force S can.
  • cerium oxide is doped at a composition ratio of 0.5 [mol%] or more, it is possible to absorb ultraviolet light of 313 [nm].
  • the composition ratio of cerium oxide is more than 5.0 [mol%]
  • the glass is devitrified.
  • zinc oxide It can absorb ultraviolet light of 254 nm. However, if zinc oxide is doped more than 20 [mol%], the glass may devitrify, so zinc oxide should be in the range of 2.0 [mol%] to 20 [mol%] or less. It is preferable to dope.
  • the glass will be colored, so the iron oxide composition ratio of at least 0.01 [mol%] 2 ⁇ 0 [mol%] It is preferable to dope in the following range.
  • the infrared transmittance coefficient indicating the water content in the glass is preferably adjusted to be in the range of 0.3 or more and 1.2 or less, particularly in the range of 0.4 or more and 0.8 or less. If the infrared transmittance coefficient is 1.2 or less, it is easy to obtain a low dielectric loss tangent applicable to a high voltage application lamp such as an external electrode fluorescent lamp (EEFU or a long cold cathode fluorescent lamp, If this is the case, the dielectric loss tangent will be small enough to be applicable to high voltage application lamps.
  • EEFU external electrode fluorescent lamp
  • the infrared transmittance coefficient (X) can be expressed by the following equation.
  • the shape of the glass bulb is not limited to the straight pipe shape, and may be, for example, an L-shape, a U-shape, a U-shape, a spiral shape or the like.
  • the cross section cut perpendicular to the tube axis is not limited to the substantially circular shape, and may be, for example, a flat shape such as a track shape or a round shape, or an elliptical shape.
  • the phosphors constituting the phosphor layer are not limited to those described above. As described below, it can be selected appropriately from various viewpoints.
  • the blue phosphor is in the range of 430 nm to 460 nm
  • the green phosphor is in the range of 51 0 nm to 550 nm
  • the red phosphor is in the range of 600 nm to 780 [nm].
  • Each of them may have an emission peak in the range of nm or less.
  • polycarbonate having good dimensional stability has come to be used as a diffusion plate for closing the opening of a backlight unit.
  • This polycarbonate is easily degraded by ultraviolet rays of 313 [nm] wavelength emitted by mercury.
  • a phosphor that absorbs ultraviolet light of wavelength 313 [nm].
  • europium activated barium aluminate / magnesium [BaMg Al 2 O: Eu 2+ ], [BaMgAl 2 O 3: Eu 2+ ] (abbreviation: BAM-B), Europi
  • x, y and z are numbers satisfying the condition 0 ⁇ x ⁇ 0.4, 0. 07 ⁇ y ⁇ 0. 25, 0. l ⁇ z ⁇ 0.6, and z is 0.4 It is preferable that ⁇ x ⁇ 0.5.
  • europium.manganese co-activated barium aluminate “BaMg Al O 2: Eu 2+ , Mn” + ], [BaMgAl 2 O: Eu 2 , Mn 2 Abbreviation
  • the phosphor layer 105 contains a phosphor that absorbs 313 [nm] ultraviolet rays, deterioration due to ultraviolet rays of the diffusion plate made of polycarbonate (PC) that blocks the opening of the above backlight unit is suppressed.
  • PC polycarbonate
  • “absorbs ultraviolet light of 313 nm” means an excitation wavelength spectrum near 254 nm (excitation emission is caused while changing the wavelength of the phosphor with excitation wavelength spectrum).
  • the intensity of the excitation wavelength spectrum of 313 [nm] is defined as 80 [%] or more. That is, a phosphor that absorbs 313 [nm] ultraviolet light is a phosphor that can absorb 313 [nm] ultraviolet light and convert it into visible light.
  • liquid crystal display devices represented by liquid crystal color televisions
  • cold cathode fluorescent lamps used as light sources for backlight units of the liquid crystal display devices and the exterior along with high color reproduction made as part of image quality improvement in recent years
  • electrode fluorescent lamps there is a need to expand the reproducible chromaticity range.
  • the chromaticity range can be expanded as compared with the case of using the phosphor in the embodiment.
  • the chromaticity coordinate value of the phosphor for high color reproduction includes a triangle formed by connecting the chromaticity coordinate values of the three phosphors used in the embodiment. On the coordinates to widen the color reproduction range.
  • the chromaticity coordinate values of the phosphors (powders) described below are the values measured with a spectroscopic analyzer (MCPD-7000) manufactured by Otsuka Electronics Co., Ltd., and the values after the decimal point It is rounded to four digits.
  • the chromaticity coordinate values are representative values of the respective phosphor materials, and may show slightly different values due to the measurement method (measurement principle) or the like.
  • europium activated strontium 'calcium''barium' black apatite [(Sr, Ca, Ba) (PO) CI: Eu 2+ ] (abbreviation: SBCA) can also be used, and the above wavelength 313 [nm]
  • SBAM-B can also absorb the ultraviolet rays of SBAM-B that can be used for high color reproduction.
  • these can also absorb ultraviolet light of wavelength 313 [nm], and MGM can also be used for high color reproduction in addition to the three phosphor particles described here.
  • these can also absorb ultraviolet light of wavelength 313 [nm], and YPV and YDS can also be used for high color reproduction besides the three phosphor particles described here.
  • the chromaticity coordinate values shown above are representative values measured only with the powder of each phosphor, and the powder of each phosphor is obtained by the measurement method (the principle of measurement) or the like.
  • the chromaticity coordinate values shown may be slightly different from the values listed above.
  • the phosphors used to emit each color of red, green, and blue are not limited to one type for each wavelength, and may be used in combination of a plurality of types.
  • the evaluation here is the three primary colors of the NTSC standard in the CIE 1931 chromaticity diagram.
  • the ratio of the area of the triangle that can connect the three chromaticity coordinate values when using the phosphor for high color reproduction, based on the area of the NTSC triangle that connects the chromaticity coordinate values (hereinafter referred to as the NTSC ratio) Do it with.).
  • the NTSC ratio is 92%, and SCA as blue, BAM-G as green, and red
  • the NTSC ratio is 100%
  • SCA blue
  • BAM-G green
  • YOX red
  • the NTSC ratio is 95%
  • the brightness can be improved by 10% as compared with Examples 1 and 2.
  • the chromaticity coordinate values used in the evaluation here are measured in the state of a liquid crystal display in which a lamp or the like is incorporated.
  • FIG. 22 is an exploded perspective view showing the lighting apparatus according to the first embodiment.
  • the lighting apparatus according to the first embodiment is a direct-type backlight unit 1300, and has a flat rectangular parallelepiped housing 1302 with one surface opened, and the inside of the housing 1302. And a plurality of cold cathode discharge lamps 1 according to the present invention stored therein, and optical sheets 1304 covering the opening of the housing 1302.
  • the housing 1302 is made of, for example, polyethylene terephthalate (PET) resin, and a metal such as silver or aluminum is vapor-deposited on the inner surface thereof to form a reflective surface 1306.
  • the housing 1302 may be made of a material other than a resin, for example, a metal material such as aluminum or a cold-rolled material (for example, SPCC).
  • a reflection sheet having a reflectance enhanced by adding carbonic acid, titanium dioxide (TiO 2) or the like to polyethylene terephthalate (PET) resin is used.
  • a cold cathode discharge lamp 1 Inside the housing 1302, a cold cathode discharge lamp 1, a pair of sockets 1308 and a pair of covers 1310 are disposed.
  • a pair of sockets 1308 are spaced apart and generally parallel to each other in the longitudinal direction of the housing 1302.
  • the socket 1308 is, for example, a processed plate material (band material) made of copper alloy such as phosphor bronze.
  • the cold cathode discharge lamp 1 When the sleeves 30, 31 of the cold cathode discharge lamp 1 are fitted into the pair of sandwiching pieces 1308A, the cold cathode discharge lamp 1 is held by the pair of sandwiching pieces 1308A, and the pair of sandwiching pieces 1308A and the sleeves 30, 31 are Electrically connected.
  • the cold cathode discharge lamp 1 attached to the pair of sockets 1308 is supplied with power from the lighting circuit 1524 (see FIG. 24) of the backlight system 1300 via the socket 1308.
  • the cover 1310 is for securing the insulation between the pair of sandwiching pieces 1308A and the pair of sandwiching pieces 1308A adjacent thereto.
  • the optical sheets 1304 include, for example, a diffusion plate 1312, a diffusion sheet 1314, and a lens sheet 1316.
  • the diffusion plate 1312 is a plate made of, for example, polymethyl methacrylate (PMMA) resin, and is disposed to close the opening of the housing 1302.
  • the diffusion sheet 1314 is made of, for example, polyester resin.
  • the lens sheet 1316 is, for example, a laminate of acrylic resin and polyester resin.
  • the optical sheets 1304 are arranged to be sequentially superimposed on the diffusion plate 1312.
  • the backlight unit 1300 as described above is provided with the cold cathode discharge lamp 1 according to the present invention as a main light source, and has excellent dark start characteristics.
  • FIG. 23 is a partially broken perspective view showing a lighting device according to a second embodiment.
  • the lighting apparatus according to the second embodiment is an edge light type backlight unit 1400, which includes a reflector 1410, a cold cathode discharge lamp 1 according to the present invention, and a socket (not shown). , A light guide plate 1420, a diffusion sheet 1430, and a prism sheet 1440.
  • Reflecting plate 1410 is disposed so as to surround the periphery of light guide plate 1420 excluding the liquid crystal panel side (arrow Q), and bottom surface portion 1411 covering the bottom surface and cold cathode discharge lamp 1 are disposed. It is composed of a side surface 1412 that covers the side surface excluding the side and a curved lamp side surface 1413 that covers the periphery of the cold cathode discharge lamp 1, and light emitted from the cold cathode discharge lamp 1 Reflect on the panel (not shown) side (arrow Q). Also, for example, the reflector 1410 It consists of a film of silver-like PET and a film of laminated metal foil such as aluminum.
  • the socket has substantially the same configuration as the backlight unit 1300 which is the lighting apparatus according to the first embodiment.
  • the end of the cold cathode discharge lamp 1 is omitted.
  • the light guide plate 1420 is for guiding the light reflected by the reflection plate 1410 to the liquid crystal panel side, and is made of, for example, a translucent plastic, and is laminated on the bottom portion 1411 of the reflection plate 1410.
  • a material polycarbonate (PC) resin or cycloolefin resin (COP) can be applied.
  • Diffusion sheet 1430 is for enlarging the field of view, and is made of, for example, a film having a diffuse transmission function made of polyethylene terephthalate resin or polyester resin, and is a light guide plate.
  • the prism sheet 1440 is for improving the brightness, and is made of, for example, a sheet obtained by bonding an acrylic resin and a polyester resin, and is laminated on the diffusion sheet 1430.
  • a diffusion plate may be further stacked on the prism sheet 1440.
  • the reflection sheet is formed on the outer surface of the glass bulb 101. It may be an aperture type lamp provided with (not shown).
  • the backlight unit 1400 as described above is provided with the cold cathode discharge lamp 1 according to the present invention as a main light source, and has excellent dark start characteristics.
  • FIG. 24 shows an outline of the liquid crystal display device according to the embodiment.
  • the liquid crystal display device 1500 is, for example, a 32 [inch] liquid crystal television, and a backlight according to the present invention disposed on the back of the liquid crystal screen unit 1522 including a liquid crystal panel etc. It is equipped with the Gut 1300, the point and the light circuit 1524.
  • the liquid crystal display unit 1522 is a known one and includes a liquid crystal panel (color filter substrate, liquid crystal, TFT substrate, etc.) (not shown), a drive module etc. (not shown), and an image from the outside is provided. Based on the signal, form a color image.
  • a liquid crystal panel color filter substrate, liquid crystal, TFT substrate, etc.
  • a drive module etc. not shown
  • the lighting circuit 1524 uses the cold cathode discharge lamp 1 (FIG. 22) inside the backlight unit 1300. Turn on.
  • the cold cathode discharge lamp 1 is operated at an operating frequency of 40 kHz to 100 kHz and a lamp current of 3.0 mA to 25 mA.
  • the force using the backlight unit 1300 according to the first embodiment as a light source device of the liquid crystal display device 1500 is not limited to this.
  • the backlight unit 1400 according to the second embodiment is used. You can use it!
  • the liquid crystal display device 1500 as described above is provided with the cold cathode discharge lamp 1 according to the present invention as a main light source, and has excellent dark start characteristics.
  • the present invention can be widely applied to discharge lamps.

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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)
  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La lampe (1) à décharge électrique à cathode froide selon l'invention comprend une ampoule (10) en verre, des électrodes (20, 21) disposées à l'intérieur d'au moins l'une des extrémités (12, 13) de l'ampoule (10) en verre, des conducteurs (30, 31) métalliques placés autour des extrémités et raccordés électriquement aux électrodes, et un émetteur (40) installé sur la surface intérieure de l'ampoule en verre. Le bord (30a) du conducteur métallique est plus près du centre de l'ampoule en verre que le bord (20a) de l'électrode. L'émetteur est plus près du centre de l'ampoule en verre que le bord (30a). Le champ électrique à la position de l'émetteur lorsque la lampe à décharge électrique à cathode froide est démarrée est si intense qu'il induit un choc d'ions. Par conséquent, des électrons secondaires sont aisément produits et l'aptitude au démarrage dans l'obscurité est améliorée.
PCT/JP2007/067656 2006-09-15 2007-09-11 Lampe à décharge électrique, illuminateur et dispositif d'affichage à cristaux liquides WO2008032705A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2007800334208A CN101512719B (zh) 2006-09-15 2007-09-11 放电灯、照明装置以及液晶显示装置
JP2008534345A JPWO2008032705A1 (ja) 2006-09-15 2007-09-11 放電ランプ、照明装置および液晶表示装置

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JP2006-251625 2006-09-15

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JP2009110915A (ja) * 2007-10-12 2009-05-21 Hosiden Corp 緩衝具及びアダプタ、並びに緩衝具又はアダプタが取り付けられる接続装置
JP2010192418A (ja) * 2009-01-26 2010-09-02 Harison Toshiba Lighting Corp 照明装置およびランプ始動方法
JP2011258480A (ja) * 2010-06-11 2011-12-22 Hosiden Corp アダプタ及びこれに接続される接続装置
JP2014110081A (ja) * 2012-11-30 2014-06-12 Panasonic Corp 始動補助部材付高圧放電ランプ

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JPH0917329A (ja) * 1995-06-30 1997-01-17 Harrison Denki Kk 冷陰極放電ランプおよびランプの点灯装置ならびに照明装置
JP2003123692A (ja) * 2001-10-18 2003-04-25 Harison Toshiba Lighting Corp 冷陰極蛍光ランプ

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JP2002367561A (ja) * 2001-06-04 2002-12-20 Harison Toshiba Lighting Corp 冷陰極蛍光ランプ
CN100395635C (zh) * 2005-04-14 2008-06-18 友达光电股份有限公司 背光模块及包括其的液晶显示器
WO2007063628A1 (fr) * 2005-11-30 2007-06-07 Sharp Kabushiki Kaisha Tube à rayons cathodiques, procédé de fabrication d’un tube à rayons cathodiques, appareil d’éclairage utilisant le tube à rayons cathodiques, procédé de fabrication d’un appareil d’éclairage, appareil de fabrication d’un appareil d

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JPH0433255U (fr) * 1990-07-17 1992-03-18
JPH056758A (ja) * 1991-02-08 1993-01-14 Toshiba Lighting & Technol Corp 高周波点灯式放電ランプおよび放電ランプの高周波点灯装置
JPH0917329A (ja) * 1995-06-30 1997-01-17 Harrison Denki Kk 冷陰極放電ランプおよびランプの点灯装置ならびに照明装置
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JP2009110915A (ja) * 2007-10-12 2009-05-21 Hosiden Corp 緩衝具及びアダプタ、並びに緩衝具又はアダプタが取り付けられる接続装置
JP2010192418A (ja) * 2009-01-26 2010-09-02 Harison Toshiba Lighting Corp 照明装置およびランプ始動方法
JP2011258480A (ja) * 2010-06-11 2011-12-22 Hosiden Corp アダプタ及びこれに接続される接続装置
JP2014110081A (ja) * 2012-11-30 2014-06-12 Panasonic Corp 始動補助部材付高圧放電ランプ

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CN101512719B (zh) 2011-05-25
TW200822169A (en) 2008-05-16
JP2009152221A (ja) 2009-07-09
JP4520529B2 (ja) 2010-08-04
CN101512719A (zh) 2009-08-19
JPWO2008032705A1 (ja) 2010-01-28

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