WO2007000859A1 - 蛍光ランプ、バックライトユニット及び液晶テレビ - Google Patents
蛍光ランプ、バックライトユニット及び液晶テレビ Download PDFInfo
- Publication number
- WO2007000859A1 WO2007000859A1 PCT/JP2006/310117 JP2006310117W WO2007000859A1 WO 2007000859 A1 WO2007000859 A1 WO 2007000859A1 JP 2006310117 W JP2006310117 W JP 2006310117W WO 2007000859 A1 WO2007000859 A1 WO 2007000859A1
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- WIPO (PCT)
- Prior art keywords
- glass bulb
- fluorescent lamp
- phosphor
- lamp according
- layer
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7734—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7777—Phosphates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7784—Chalcogenides
- C09K11/7787—Oxides
-
- 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
- H01J61/302—Vessels; Containers characterised by the material of the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
- H01J61/44—Devices characterised by the luminescent material
Definitions
- the present invention relates to a fluorescent lamp, an electronic light lamp and a liquid crystal television provided with electrodes at both ends of a tubular glass bulb.
- a lamp used for this backlight unit for example, a fluorescent lamp having an electrode outside the glass bulb (a so-called external electrode type fluorescent lamp) or a fluorescent lamp having an electrode inside the glass bulb (for example, a cold cathode Type fluorescent lamps) have been put to practical use.
- a fluorescent lamp having an electrode outside the glass bulb a so-called external electrode type fluorescent lamp
- a fluorescent lamp having an electrode inside the glass bulb for example, a cold cathode Type fluorescent lamps
- these fluorescent lamps do not turn on immediately even when a starting voltage is applied under dark conditions, that is, they have such a characteristic that the dark starting characteristic is bad, that it takes a long time to turn on.
- an electron-emitting substance having a high secondary electron emission coefficient for example, a cesium compound
- secondary electrons are emitted from the coated cesium compound, and the secondary electrons are likely to cause a discharge at the time of start-up, and as a result, the dark start characteristics are improved.
- Patent Document 1 As prior art document information related to the invention of this application, Patent Document 1 is known, for example.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-36815
- the cesium compound in the vicinity of the light output region causes a luminous flux when the lamp is lit in some cases.
- the problem is that the problem is that it decreases early with time.
- the Cesium is released from sulfur compounds.
- the released cesium scatters and adheres to the phosphor layer in the above light emitting area. Since cesium has a yellow color and low light transmittance, the light transmittance of the phosphor layer of the cesium-adhered portion also decreases, and thus the luminous flux with the lamp lighting decreases with time.
- the present invention has been made in view of the above problems, and is a fluorescent lamp, a backlight unit, and a liquid crystal television which are excellent in dark start characteristics and can prevent a decrease in luminous flux and color shift of the lamp with time. It is intended to be provided.
- a fluorescent lamp comprises a glass bulb having a discharge space inside, an electrode disposed at both ends of the glass bulb, and an inner surface of the glass bulb. It is a fluorescent lamp in which the fluorescent substance layer which contains fluorescent substance particles is formed, and said glass bulb is comprised from glass whose content rate of sodium oxalate is 3% or more and 20% or less, and said fluorescence In the phosphor particles in the body layer, the metal oxide adheres in a wider area to the surface of the alumina-containing phosphor particles containing alumina than the surface of the alumina-free phosphor particles not containing alumina. It is characterized by being scolded.
- the metal oxide adheres to the surface of the alumina-containing phosphor particle in a wider area than the surface of the alumina-free phosphor particle which does not contain alumina, and therefore, it is easily deteriorated. ! / The adhesion of mercury to alumina-containing phosphor particles can be effectively suppressed, and the decrease in luminous flux and the color shift of the lamp with time can be prevented.
- a protective layer is formed on the inner surface of the glass bulb, and the phosphor layer is formed on the protective layer, and a protective layer is not formed on the inner surface of the end portion of the glass bulb. , Characterized in that there is a region where the glass bulb is exposed to the discharge space ing.
- the glass contains a predetermined amount of sodium oxalate, sodium oxalate is present in the area in the discharge space where the protective layer is not formed. Sodium acid sodium in this region will be exposed to the discharge space, and the dark start characteristics can be significantly improved.
- At least one of Y 2 O, MgO, La 2 O, or SiO is
- the phosphor layer is formed across the inner ends of both electrodes, and the protective layer is formed across the outer ends of both electrodes.
- the glass bulb is characterized in that the content of the sodium oxide is 5% or more and 20% or less.
- the metal oxide does not adhere to the surface of the alumina-free phosphor particles, and the metal oxide adheres only to the surface of the alumina-containing phosphor particles. Do.
- the metal oxide may be at least one of Y 2 O, MgO, La 2 O, or SiO.
- the invention is characterized in that the concentration of the metal oxide to the phosphor of the phosphor layer is 0.1% by weight or more.
- the electrode is an external electrode provided on the outer periphery of both end portions of the glass sleeve.
- the external electrode is characterized in that it is formed of solder, silver paste, nickel paste, gold paste, palladium paste, or carbon paste! / Displacement.
- a metal member which surrounds at least a part of the outer peripheral surface of the outer electrode and is connected to the outer electrode, and an end portion of the metal member on the center side of the glass bulb surrounds the outer electrode.
- Position force on the center side of the glass bulb A distance is set on the end of the glass bulb side It is characterized by being open and installed.
- an end of the metal member on the central side of the glass bulb is chamfered.
- the metal member has a slit formed in the longitudinal direction, and is connected to the external electrode by an elastic force.
- a protective layer is formed on the inner surface of the glass bulb at least in a portion facing the external electrode, the protective layer being made of an aggregate of metal oxide particles, and having an average film thickness of 2 m.
- the surface roughness is less than or equal to: L m
- the external electrode includes a conductive layer formed in a roughened area of the outer surface of the glass bulb, and the conductive layer has a maximum thickness of 70 m or less, and It is characterized in that the edge of the conductive layer has an arc shape on the outer side, and the thickness becomes thinner toward the edge.
- the external electrode is laminated on an outer surface of the electrode body layer, and an electrode main body layer composed mainly of silver or copper formed on a roughened area of the outer surface of the glass bulb. And a coating layer, wherein the outer electrode has a maximum thickness of 70 m or less, and the thickness of the edge portion of the outer electrode becomes thinner toward the edge.
- edge of the conductive layer is arc-shaped outward, and the thickness of the conductive layer becomes thinner toward the edge.
- a backlight unit according to the present invention is characterized by including the fluorescent lamp as a light source.
- a liquid crystal television according to the present invention is characterized by comprising the above-mentioned backlight unit.
- the “fluorescent lamp” according to the present invention is an external electrode type fluorescent lamp whose electrode is on the outer periphery of the glass bulb, and a cold cathode fluorescent lamp whose cold cathode type electrode is inside the glass bulb. Is a concept that at least includes
- alumina-containing phosphor particles refers to phosphor particles containing Al 2 O in the atomic formula.
- alumina-free phosphor particles refers to the chemical formula for phosphor particles.
- FIG. 1 is a view showing an outline of a liquid crystal television according to a first embodiment of the present invention.
- FIG. 2 is a view showing an outline of a socket base 50 in the first embodiment.
- FIG. 3 (a) is a view showing an outline of the external electrode type fluorescent lamp 100 in the first embodiment
- FIG. 3 (b) is a view showing an appearance of a metal member 104.
- FIG. 4 is a graph showing the change in color shift due to the concentration of metal oxide relative to the phosphor.
- FIG. 5 It is a figure which shows the change of the brightness
- FIG. 6 is a view schematically showing a phosphor in a phosphor layer.
- FIG. 7 is a view showing an outline of an external electrode fluorescent lamp 200 according to Embodiment 2.
- FIG. 8 is a diagram showing an outline of an external electrode fluorescent lamp 400 according to Modification 1 of Embodiment 2.
- FIG. 9 A diagram showing an outline of an external electrode fluorescent lamp 420 according to Modification 2 of Embodiment 2.
- FIG. 10 is a view showing an outline of a cold cathode fluorescent lamp 300 according to a third embodiment. Explanation of sign
- FIG. 1 is a diagram showing an outline of a liquid crystal television according to a first embodiment of the present invention.
- the liquid crystal television 10 shown in FIG. 1 is, for example, a 32 inch liquid crystal television, and includes a liquid crystal screen unit 11 and a backlight unit 12.
- the liquid crystal display unit 11 includes a color filter substrate, a liquid crystal, a TFT substrate, a drive module and the like (not shown), and forms a color image based on an external image signal.
- the knock light unit 12 is an LCBL unit, and includes one high frequency electronic ballast 13 and 16 dielectric barrier discharge lamps 100 (hereinafter simply referred to as "fluorescent lamps 100").
- the high frequency electronic ballast 13 is a lighting circuit for lighting all of the sixteen fluorescent lamps 100.
- the socket base 50 holds the ends of the sixteen fluorescent lamps 100 in the electrode socket 51 and the electrode socket 52 which also have elastic stainless steel, phosphor bronze etc. It lights up.
- the width D of the holding portion of the electrode socket 51 and the electrode socket 52 is within the size range that can be held within the area of the external electrodes 102 and 103 described below in order to suppress the occurrence of corona discharge when the lamp is lit. I'm designing.
- FIG. 3 (a) is a diagram showing an outline of the fluorescent lamp 100 in the first embodiment of the present invention. As shown in FIG. 3 (a), the fluorescent lamp 100 in the first embodiment of the present invention is And a tubular glass valve 101.
- Cap-shaped external electrodes 102 and 103 formed of a conductive layer are provided on the outer periphery of both ends of the glass bulb 101.
- Cap-shaped metal members 104 and 105 covering the external electrodes 102 and 103 are provided on the outer circumferences of the external electrodes 102 and 103, respectively.
- Fe-Ni-Co As a material of the metal members 104 and 105, for example, Fe-Ni-Co (Kovar) can be used as long as it is a material having a good electrical conductivity and a thermal expansion coefficient close to that of the glass bulb 101.
- the external electrodes 102 and 103 are not completely covered by the metal members 104 and 105, but the ends of the external electrodes 102 and 103 on the center side of the glass bulb 102a, 103a (ends 102a, 103a of opening rules of outer electrodes 102, 103) are exposed!
- the distance L between the ends 102a and 103a on the glass bulb center side of the external electrodes 102 and 103 and the ends 104a and 105a on the glass bulb center side of the metal members 104 and 105 is, for example, 1 mm.
- the glass bulb 101 has a substantially circular cross section when cut in a plane perpendicular to the tube axis.
- the inner surface of the glass bulb 101 is red (YO: Eu 3+ ), green (LaPO: Ce 3) + , Tb 3+ ) and blue (Ba
- Phosphor layer by coating and firing a rare earth phosphor mixed with a phosphor of Mg Al 2 O 3: Eu 2+ )
- the phosphor layer 106 has a thickness of about 20 / zm, and the formation range is the region between the inner ends of the outer electrodes 102 and 103 (the corresponding region between the inner side of the outer electrode 102 and the inner side of the outer electrode 103) It is.
- the metal on the surface of the blue phosphor particle 106B (BaMg Al 2 O 3: Eu 2+ ) is used. Oxidized as oxide 107
- the red phosphor particles 106 R around the metal oxide coated with the blue phosphor particles 106 B are in contact. , And may adhere to the green phosphor particles 106G.
- red phosphor particles 106R and the green phosphor particles 106G may be positively coated with a metal oxide.
- the inside of the glass bulb 101 is filled with a rare gas 108 such as argon and neon at a pressure of about 8 kPa and about 2 mg of mercury 109.
- a rare gas 108 such as argon and neon at a pressure of about 8 kPa and about 2 mg of mercury 109.
- the rare gas 108 which is the discharge medium, is filled in a reduced pressure state.
- Glass bulb 101 is a discharge vessel, and is made of, for example, soda glass having a sodium oxide content of about 16 (%).
- FIG. 3 (b) is a view showing the appearance of the metal member 104.
- the metal member 104 is similar to the metal member 105.
- the metal member 104 is formed in a shape (cap shape) in which a hemispherical dome is covered on one circular side of a cylindrical shape, and in order to give the metal member 104 an elastic force, for example, in the longitudinal direction Two slits 110 are provided, and the metal member 104 is connected to the external electrode 102 using the elastic force of the slits 110. It is
- the metal member 104 is also fitted with the end 101 b force of the glass bulb 101. Since the end 104a on the mounting direction side of the metal member 104 is chamfered so as not to have an acute angle as shown in part E of FIG. 3A, the end force of the glass bulb 101 is attached. In addition, the outer peripheral surfaces of the external electrodes 102 and 103 are less likely to be damaged during mounting and the like.
- the metal members 104 and 105 do not have a fixed shape like metal foils and metal tapes etc. in consideration of reduction of damage to the outer peripheral surface of the external electrodes 102 and 103, and the external force also takes a shape when external force is applied. Unlike plastic members that change and leave the shape even if the force is removed, they have a fixed shape, and they can easily change their shape when external force is applied! /, Non-plastic metal parts are preferred.
- metal member 104 and metal member 105 are, for example, the total length.
- the gap between the glass bulb 101 and the metal members 104 and 105 is 0.05 on average. It is mm.
- the external electrodes 102 and 103 are formed by dipping a conductive paste, for example, silver paste on both ends of the sealed glass bulb 101 by dipping in advance, and a predetermined length from one end of the glass bulb 101, for example, a total length 25. It is formed and attached to Omm.
- a conductive paste for example, silver paste
- the conductive paste of the external electrodes 102 and 103 is not limited to silver paste, and nickel paste, gold paste, palladium paste or carbon paste may be used.
- soda glass containing sodium oxide (Na 2 O) of about 16 (%) was used as the glass constituting the glass bulb 101, but the glass of the present invention
- the acid included in the glass constituting the glass bulb 101 is precipitated, and the precipitated sodium chloride is used to improve the dark start characteristics. There is. Therefore, it is only necessary to precipitate sodium oxalate to the extent that the dark start characteristics can be improved.
- the content of sodium oxide is preferably in the range of 3 (%) or more and 20 (%) or less. Also, when the content of sodium oxide is 5 (%) or more, the dark start time under dark conditions is about 1 second or less, and conversely, when the content of sodium oxide exceeds 20 (%), It is a force that causes problems such as the whitening of the glass bulb and the decrease in luminance due to the use of time, and the strength of the glass bulb 101 itself being reduced.
- a glass with a content of alkali metal within the above range and a content of lead below 0.1 (%) is preferable (so-called “lead free” “Glass”), and further, glass with a lead content of less than 0.01 (%) is more preferable.
- the glass is not limited to soda glass. If the content of sodium oxide is a glass within the above range, the same effect of improving the dark start characteristics can be obtained even if glass other than soda glass is used.
- the surface of the blue phosphor particle 106 B (BaMg Al 2 O 5: Eu 2+ )
- the metal oxide 107 was coated with yttrium oxide (Y.sub.2O.sub.3).
- the inner diameter of the force glass valve described in the case where the outer diameter of the glass bulb 101 is ⁇ 4.0 mm and the inner diameter ⁇ 3.0 mm may be larger than 3. O mm.
- the inner diameter is preferably 3.0 mm or less from the viewpoint of thinning the knock light unit and the optimum lamp efficiency.
- the lower limit is preferably 1.0 mm or more from the viewpoint of manufacturing difficulty.
- the cross-sectional shape of the glass bulb 101 is described as a circular shape.
- the shape is not limited to this, and may be an elliptical shape, an oval shape, or the like.
- the shapes of the external electrodes 102 and 103 and the metal members 104 and 105 provided at both ends of the glass bulb 101 are not limited to the force described in the form of a cap, for example, external electrodes 102 and 103 may be made into a cap shape, and the metal members 104 and 105 may be made into a weir shape (cylindrical shape in which the bottom surface and the top surface are open) covering the cylindrical portion of the external electrodes 102 and 103.
- the fluorescent lamp 100 is not limited to the force described for the straight tube, and may have another shape such as a U-shape or a W-shape.
- the backlight unit may be a direct type, and the lamp according to the present invention may be used as a light source of the power edge type backlight unit described above.
- sodium soda glass is contained in soda glass, sodium sodium oxide is present on the surface of the glass bulb 101 in the discharge space.
- the dark start characteristics can be improved by sodium hydroxide in the region near the external electrodes 102 and 103, and unlike the configuration described in the prior art, in the present embodiment, the cesium compound is contained in the glass bulb near the electrodes. Since it does not have yellow, it is possible to prevent yellowing of the glass due to cesium, and to suppress the decrease in luminous flux over time of lamp lighting. Note that radioactive substances such as cesium may be applied to the inner surface of both ends of the glass bulb 101, which is considered to be less likely to scatter in the light emission region.
- metal oxide deposits with a larger area on the surface of alumina-containing phosphor particles 106 B containing alumina than the surfaces of alumina-free phosphor particles 106 R and 106 G which do not contain alumina. There is.
- the metal oxide 107 is attached to a part or the whole of the surface of the alumina-containing phosphor particle 106 B, so to speak, a protective film of the metal oxide 107 is formed.
- Alumina-containing phosphor particles 106 B are liable to deteriorate due to the adhesion of mercury, and also tend to deteriorate due to the reaction with sodium oxide. For this reason, according to the above configuration, the mercury adhesion to the anolemina-containing phosphor particles is effectively suppressed, and it is possible to suppress the decrease of the luminous flux when the lamp is lit. In addition to this, it is possible to suppress the reaction between the sodium oxide deposited in the soda daga's force and the alumina-containing phosphor particles 106B, and the reaction degrades the alumina-containing phosphor particles 106B and the lamp light It is possible to prevent the occurrence of color shift.
- the lamp luminous flux can be increased by adhesion of the metal oxide. There is no need to lower
- FIG. 4 shows the concentration (wt.%) Of the metal oxide relative to the phosphor of the phosphor layer 106 on the horizontal axis and the degree of color shift on the vertical axis.
- the color shift means the degree of deviation from the target value (design value) with respect to the value on the CIE chromaticity coordinate (x1, y) and the actual value on the CIE chromaticity coordinate (x1, y).
- the inventors have examined the degree of color shift (in the case where ⁇ x + ⁇ exceeds 0.10, the lamp For example, when used as a backlight of a liquid crystal display device, the color reproduction of the liquid crystal display screen was adversely affected, and it was found to be undesirable.
- FIG. 5 shows the metal oxide concentration (wt.%) Relative to the phosphor of the phosphor layer 106 on the horizontal axis and the relative luminance (%) of the lamp on the vertical axis.
- relative luminance of lamp means that the initial luminance at the initial stage of lighting (for example, when lighting for 0 hours has elapsed) is 100% for lamps whose concentration of the metal oxide is Owt.%.
- concentration of the metal oxide at that time indicates the ratio of the lighting initial luminance in the lamp with a certain concentration.
- the relative brightness of the lamp falls below 90%, the light of the lamp becomes dark.
- the liquid crystal display screen becomes dark, which is undesirable. I found it.
- the relative brightness of the lamp can be made to be 90.5% or more by setting the concentration of the metal oxide to be 1.8 wt.% Or less.
- the relative brightness of the lamp can be 96.0%, which can suppress the decrease in brightness to an acceptable range.
- the concentration of the metal oxide to the phosphor of the phosphor layer 106 is 0.3 to 0.9 wt.%. The color shift can be further reduced and the decrease in luminance can also be suppressed.
- cap-shaped metal members 104 and 105 are provided on the outer periphery of the end of the glass bulb 101 so as to surround and connect at least a part of the outer peripheral surfaces of the external electrodes 102 and 103 formed of conductive layers.
- the ends 104a and 105a of the metal members 104 and 105 on the center side of the bulb 101 are installed at a distance L from the position of the external electrode ends 102a and 103a on the center side of the glass bulb 101 on the glass bulb end 101b side Therefore, no gap is generated between the metal members 104 and 105 and the glass bulb 101 due to variations in installation and installation of the metal members 104 and 105. As a result, generation of corona discharge when the lamp is lit can be suppressed between the metal members 104 and 105 and the glass bulb 101.
- the metal members 104 and 105 surround the external electrodes 102 and 103 with a length of 3 mm or more, the metal members 104 and 105 at both ends of the fluorescent lamp 100 are the electrode sockets of the socket base 50. 51 and the electrode socket 52 are stably connected and held, and the lamp can be lit. Also, the end 104 a of the metal member 104, 105 at the center side of the glass bulb 101, 105 a force chamfer Since the metal bulbs 104 and 105 can be easily mounted, the end force of the glass bulb 101 can also be used to damage the outer peripheral surfaces of the external electrodes 102 and 103 at the time of mounting.
- the metal members 104 and 105 have two or more slits 110 formed in the longitudinal direction and are connected to the external electrodes 102 and 103 by the elastic force of the metal members 104 and 105.
- the end force can also be easily attached to the metal members 104 and 105, and damage to the outer peripheral surface of the external electrodes 102 and 103 can be made difficult at the time of attachment.
- a silver paste as the conductive layer which is the external electrode 102, 103, the adhesion with the glass nozzle 101 is improved, and the occurrence of corona discharge between the glass bulb 101 and the external electrode 102, 103 is suppressed. can do.
- the outer peripheral surface of the external electrodes 102 and 103 is a metal member from the end of the glass bulb 101. It is possible to make it difficult to damage the outer peripheral surfaces of the external electrodes 102, 103 when the 104, 105 are attached.
- the force coating mode described as that the phosphor particles 106 B are entirely coated (coated) with the metal oxide film 107 is not limited to this.
- it may be a coating mode in which a large number of metal oxide fine particles are attached to the surface of the phosphor particle 106 B.
- an alumina-containing phosphor may be used also for the green phosphor particles which are lined with only the blue phosphor particles.
- FIG. 6 is a view schematically showing a phosphor in the phosphor layer, as in the case of the part F of FIG. 3 (a).
- a material of the green phosphor particle 1061G BaMg Al 2 O 3: Eu containing alumina
- alumina-containing phosphor particles 106 B and 106 1 G are coated with a metal oxide.
- the phosphor layer 106 is formed directly on the inner surface of the glass bulb 101.
- the configuration was the dielectric barrier discharge lamp according to Embodiment 2, the protective layer and the phosphor layer were formed in this order on the inner surface of the glass bulb.
- FIG. 7 is a diagram showing an outline of a dielectric barrier discharge lamp 200 according to Embodiment 2.
- the lamp 200 shown in FIG. 7 has basically the same configuration as the fluorescent lamp 100 of FIG.
- the members corresponding to the members in the 100's of Fig. 3 have the 200's in the lower two digits with the same reference numerals to simplify the description.
- the lamp 200 is provided with a tubular glass bulb 201 !.
- a protective layer 211 and a phosphor layer 206 are formed in this order on the inner surface of the glass bulb.
- the phosphor layer 206 is laminated on the protective layer 211, and it can be said.
- the protective layer 211 it is possible to use metal oxides such as Y 2 O, MgO, La 2 O or SiO 2.
- the protective layer 211 containing such metal oxide By providing the protective layer 211 containing such metal oxide, it is possible to prevent sodium oxide deposited from the glass bulb 201 from transmitting to the phosphor layer 206, and mercury adheres to sodium oxide. Is effectively suppressed, and it is possible to suppress the decrease in luminous flux over time of lamp lighting.
- the inner surfaces of the glass bulb 201 at both end portions 201a and 201b are regions where the protective layer 211 is not formed. In such a region, the glass bulb is exposed to the discharge space (exfoliated), so that the effect of improving the dark start characteristics of the sodium chloride acid glass that is the glass bulb material can be obtained. That is, it is possible to obtain the effect of improving the dark start characteristics while receiving the effect of forming the protective layer.
- the protective layer 211 is formed over a larger area than the phosphor layer 206, but is not limited thereto. That is, the protective layer is a range in which the end face and the end face of the phosphor layer substantially coincide, or a range in which the phosphor layer and the inner surface of the glass bulb are not in direct contact. And the area where the phosphor layer can be shielded).
- the protective layer is an external portion in the glass bulb, in consideration of pinholes due to ionized mercury particles jumping in during lighting and colliding with the inner peripheral surface of the glass bulb. Between the outer ends of the It is preferable to form over the outside of the pole and the outside of the other external electrode) or to the vicinity of the end face of the glass bulb.
- Modification 1 The optimum characteristics of the protective film, the shape of the outer surface of the glass bulb, and the like will be described below as Modification 1 according to the second embodiment.
- FIG. 8 is a view showing an outline of an external electrode fluorescent lamp 400 according to Modification 1 of the second embodiment.
- mercury 407 is enclosed as a luminescent material.
- a protective layer 404 and a phosphor layer 405 are laminated in this order on the inner surface of the glass bulb.
- the external electrodes 402 and 403 are blast roughened 401 a of the outer surface of the end of the glass bulb 401.
- the conductive layers 408 and 409 are formed in the region where the surface 401 b (surface roughness 1 to 3 / ⁇ ⁇ ) is applied.
- the conductive layers 408 and 409 have a maximum thickness of 70 ⁇ m or less, and the edge portions 408 a and 409 a are arc-shaped outward, and the thickness becomes thinner toward the edge.
- W2 exceeds 0.5 mm or more from the region (S) where the edge portions 408a and 409a of the conductive layers 408 and 409 have been subjected to surface roughening 401 a and 401 b of the outer surface of the glass bulb 401. It is provided at a position, preferably 0.5 mm or more and 3 mm or less.
- Conductive layers 408 and 409 are solder materials, for example, tin / an alloy of tin and indium, or an alloy of tin and bismuth / !, and one of them is a main component, and one end of the glass bulb 401 A predetermined length, a total length W of 25 mm, and a width W1 of the cylindrical portion of about 20 mm are formed over the entire circumference of the glass bulb 401.
- the solder whose 25 mm is melted from one end of the sealed glass bulb 401 is dipped in an ultrasonic solder crucible, and a thickness of about 10 m is formed on the outer peripheral surface of the glass bulb 401 by a known ultrasonic solder diving. Form a solder layer.
- the conductive layers 408 and 409 preferably contain at least one of antimony, zinc and aluminum as an additive in the solder material from the viewpoint of adhesion to the glass bulb 401.
- the above solder material is It is preferable to include it as an additive such as zinc or zinc, and in consideration of the environment, it is preferable not to contain environmentally harmful substances such as lead.
- edges of the conductive layers 408 and 409, 408a, and 409a [Finally, the above W2 is not less than 0.5 mm.
- the conductive layer 408 is obtained when the above-mentioned ultrasonic solder dipping is used.
- 09a is square! /, It is a force that makes corona discharge easy to occur.
- the edge portions 408a and 409a of the conductive layers 408 and 409 have a problem that the surface force of the glass bulb 401 is also easily peeled off.
- the protective film 404 has a maximum thickness of 0.5 / z m (surface roughness is set by the aggregate of metal oxide particles).
- ytrium oxide YO 2
- magnesium oxide MgO
- lanthanum oxide La 2 O 3
- the thickness of the protective film 404 is 2 m and the surface roughness of the protective film exceeds: L m
- the luminance is lowered by about 20% as compared to the state without the protective film, and it is necessary If the brightness can not be obtained, and if the maximum thickness is less than 0.5 m and the surface roughness of the protective film 404 exceeds 0. 5, the denseness of the protective film is reduced and the drive current is increased to 5 mA or more.
- the brightness is improved by, for example, the inner wall of the glass bulb 401 facing the external electrodes 402 and 403 is exposed to the impact of argon ions or mercury ions, it is corroded and the holes (pin holes) are exposed. This is because the inventor has confirmed that a failure occurs.
- the protective film 404 is not formed on the inner surface 40 lc, 401 d of the end of the glass bulb 401, and when the end of the glass bulb 401 is sealed, it is deposited from the glass material in this region.
- Alkali metals of Na can be present.
- the dark start characteristic can be improved.
- the surface roughening of the outer surface of the end portion of glass groove 401 and the surface of protective film 404 are carried out.
- the roughness is “maximum height Ry” measured in accordance with JIS B 0601: '94.
- the shape of the external electrodes 402 and 403 is not limited to a cap-like shape, but may be in the form of a bowl (a cylindrical shape having an open bottom and an upper surface).
- a cap-shaped metal member may be provided to cover the external electrodes 402 and 403.
- Modification 2 is basically the same as the external electrode fluorescent lamp 400 described with reference to FIG. 8 except that the configuration of the external electrode is different.
- FIG. 9 is a diagram showing an outline of an external electrode fluorescent lamp 420 according to the second modification of the second embodiment.
- the external electrodes 412 and 413 have a cap shape, and the outer surface of the end portion of the glass bulb 401 is roughened by blast roughing 401 a and 401 b (surface roughness 1 to 3 ⁇ m) in a region
- An electrode body layer 418 or 419 composed mainly of silver or copper formed on the outer surface of the bulb 401 and a coating layer 416 or 417 laminated on the outside of the electrode body layer 418 or 419 .
- the maximum thickness of the external electrodes 412 and 413 is 70 ⁇ m or less, and the edge portions 412 a and 413 a of the external electrodes 412 and 4 13 are arc-shaped outward, and the thickness approaches the edge. It is getting thinner.
- the electrode body layers 418 and 419 have a maximum thickness d2 of about 7 ⁇ m.
- the thickness of the electrode main body layers 418 and 419 in the present invention means the maximum thickness of the entire electrode body layer.
- the electrode main layers 418 and 419 contain silver or copper as a main component.
- the meaning of containing silver or copper as the main component also includes the case where an alloy of silver and copper is the main component.
- the term “main component” means that the component contained most in the composition is a component that greatly affects the physical properties of the composition. Therefore, compounds other than silver or copper may be contained as additives.
- glass frit to the electrode body layers 418 and 419.
- a glass frit containing 1.0 to 5. ( ⁇ % of bismuth (Bi) is added, the anchor effect of the glass frit causes the electrode body layer 418 to the glass noble 401.
- Other additives include ethyl cellulose and the like.
- the electrode body layers 418 and 419 have a predetermined length from one end of the glass bulb 401, a total length W of 25 mm, a width W1 of the cylindrical portion of about 20 mm, and are formed over the entire circumference of the glass bulb 401. It is done.
- 24 mm from the end of the sealed glass bulb 401 is dipped in the molten silver paste crucible by the known debubbing method, and about 7 m of silver paste is applied to the outer peripheral surface of the glass bulb 401. , Baking to form.
- the coating layers 416, 417 are laminated on the outer surfaces of the electrode body layers 418, 419 and have a thickness d3 of about 7 m.
- the thickness d3 of the coating layer 416, 417 means the maximum thickness of the entire coating layer 416, 417.
- the coating layers 416 and 417 are, for example, solder-based, which also has a composition power of tin: 95.2 wt%, silver: 3.8 wt%, copper: 1. Owt%. Since silver is contained in this solder, silver corrosion of the electrode main layers 418 and 419 is unlikely to occur. In addition, in order to make silver corrosion hard to occur, it is preferable to make content of silver into the range of 1.0 to 8.0%.
- the coating layers 416 and 417 can be formed by a known dicing method (for example, Japanese Patent Application Laid-Open No. 2004-146351). Briefly, a glass bulb 401 attached to the outer surface of the electrode body layer 418, 419 is dipped 25 mm from the end into a molten solder pot, and about 7 m of the outer surface of the electrode body layer 418, 419 is After applying solder, it is fired and formed.
- a known dicing method for example, Japanese Patent Application Laid-Open No. 2004-146351. Briefly, a glass bulb 401 attached to the outer surface of the electrode body layer 418, 419 is dipped 25 mm from the end into a molten solder pot, and about 7 m of the outer surface of the electrode body layer 418, 419 is After applying solder, it is fired and formed.
- composition of the solder for forming the coating layers 416 and 417 is not limited to the above, and may contain, for example, at least one of bismuth, zinc, lead and the like. However, in order to obtain an environmentally friendly external electrode discharge lamp, it is preferable that environmental load substances such as lead and antimony not be contained. Also, the coating layers 416 and 417 may be formed of materials other than solder. For example, a nickel layer formed by electroless plating may be used.
- the entire outer surface of the electrode main layers 418 and 419 be covered with the coating layers 416 and 417.
- the influence on the conductivity of the external electrodes 412 and 413 is small, a part of the electrode main layers 418 and 419 may be exposed to the atmosphere for production or design reasons.
- the outer surface of the electrode body layer on which the coating layers 416 and 417 are laminated be polished. Better!/,.
- the dielectric barrier discharge lamp has been described as an example of the fluorescent lamp.
- the present invention can be applied not only to this but also to a cold cathode fluorescent lamp.
- the third embodiment will be described.
- FIG. 10 is a diagram showing an outline of a cold cathode fluorescent lamp 300 according to the third embodiment.
- the cold cathode fluorescent lamp 300 has a straight tubular soda glass glass bulb 301.
- the dimensions of the glass bulb 301 are, for example, a total length of 450 mm, an outer diameter of 3.0 mm, an inner diameter of 2.0 mm, and a thickness of 0.5 mm.
- lead wires 314 and 316 are sealed at both ends of the glass bulb 301.
- the lead wire 314 (316) is a connecting wire composed of an internal lead wire 314A (316A) of tungsten force and an external lead wire 314B (316B) which also becomes an anchor. Electrodes 302 and 303 are joined by laser welding or the like to the inner side end portions of the inner lead wires 314A and 316A, respectively.
- the electrodes 302 and 303 are so-called hollow cylindrical electrodes having a bottomed cylindrical shape, and use niobium as a material.
- a rare gas such as mercury (not shown) as light emitting material, argon, or neon is sealed at a predetermined filling pressure.
- a phosphor layer 306 having a thickness of about 20 ⁇ m is formed on the inner surface of the glass bulb 301.
- the phosphor layer 306 is a process of applying a phosphor suspension to the inner surface of a glass tube, drying and firing It was formed through the
- the phosphor layer 306 is formed by mixing the phosphors of the red phosphor particle 306R, the green phosphor particle 306G, and the blue phosphor particle 306B, as shown in an enlarged manner in FIG.
- the blue phosphor particles 306B are made of barium magnesium aluminate Yu-podium-activated phosphor (BaMg Al 2 O 5: Eu 2+ ) and are alumina-containing phosphors.
- a metal oxide 307 is coated in a layer on the surface of the blue phosphor particle 306B.
- the present invention can be used for a liquid crystal television because it can provide a fluorescent lamp capable of improving the dark start characteristics and reducing the luminous flux after lamp lighting without performing a complicated process. It can be widely applied as a light source for reading documents used in office equipment such as direct type backlight units, copiers, facsimiles, and image scanners, and its industrial utility value is extremely high.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007523361A JP4109314B2 (ja) | 2005-05-31 | 2006-05-22 | 外部電極型蛍光ランプ、バックライトユニット及び液晶テレビ |
US11/910,033 US20080252193A1 (en) | 2005-05-31 | 2006-05-22 | Fluorescent Lamp, Backlight Unit and Liquid Crystal Television |
KR1020077024085A KR100934069B1 (ko) | 2005-05-31 | 2006-05-22 | 형광램프, 백라이트 유닛 및 액정 텔레비전 |
CN2006800192791A CN101189704B (zh) | 2005-05-31 | 2006-05-22 | 荧光灯、背光照明单元以及液晶电视 |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-158728 | 2005-05-31 | ||
JP2005158728 | 2005-05-31 | ||
JP2005-237178 | 2005-08-18 | ||
JP2005237177 | 2005-08-18 | ||
JP2005237178 | 2005-08-18 | ||
JP2005-237177 | 2005-08-18 | ||
JP2005359956 | 2005-12-14 | ||
JP2005-359956 | 2005-12-14 |
Publications (1)
Publication Number | Publication Date |
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WO2007000859A1 true WO2007000859A1 (ja) | 2007-01-04 |
Family
ID=37595116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/310117 WO2007000859A1 (ja) | 2005-05-31 | 2006-05-22 | 蛍光ランプ、バックライトユニット及び液晶テレビ |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080252193A1 (ja) |
JP (1) | JP4109314B2 (ja) |
KR (1) | KR100934069B1 (ja) |
CN (1) | CN101189704B (ja) |
TW (1) | TW200703417A (ja) |
WO (1) | WO2007000859A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007073481A (ja) * | 2005-09-09 | 2007-03-22 | Nec Lighting Ltd | 放電ランプ |
JP2008210754A (ja) * | 2007-02-28 | 2008-09-11 | Matsushita Electric Ind Co Ltd | 蛍光ランプの製造方法、蛍光ランプ用ガラス管の製造方法、および、蛍光ランプ |
JPWO2015016274A1 (ja) * | 2013-08-02 | 2017-03-02 | 株式会社日本フォトサイエンス | 無電極紫外線放射ランプおよび紫外線処理装置 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN201117634Y (zh) * | 2007-11-02 | 2008-09-17 | 群康科技(深圳)有限公司 | 外电极荧光灯和背光模组 |
JP2009187828A (ja) * | 2008-02-07 | 2009-08-20 | Hitachi Displays Ltd | 冷陰極蛍光放電ランプ及びその製造方法 |
JP2010027576A (ja) * | 2008-07-24 | 2010-02-04 | Nec Lighting Ltd | 外面電極蛍光ランプ |
TWI384520B (zh) * | 2008-08-27 | 2013-02-01 | Wellypower Optronics Corp | 放電燈管及其製作方法 |
JP5952902B2 (ja) | 2011-06-29 | 2016-07-13 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | コーティングを含むルミネッセンス物質粒子及び当該ルミネッセンス物質を含む照明ユニット |
CN108662444B (zh) * | 2017-03-30 | 2021-01-05 | 深圳市优绿源科技有限公司 | 紫外光led光源装置 |
CN109323208A (zh) * | 2018-09-25 | 2019-02-12 | 杨毅 | 发光装置、灯具和交通工具 |
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- 2006-05-22 US US11/910,033 patent/US20080252193A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
CN101189704A (zh) | 2008-05-28 |
JP4109314B2 (ja) | 2008-07-02 |
KR100934069B1 (ko) | 2009-12-24 |
US20080252193A1 (en) | 2008-10-16 |
CN101189704B (zh) | 2010-05-19 |
TW200703417A (en) | 2007-01-16 |
JPWO2007000859A1 (ja) | 2009-01-22 |
KR20070121784A (ko) | 2007-12-27 |
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