WO2009098860A1 - Émetteur à mercure, procédé de fabrication d'une lampe à décharge à basse pression utilisant l'émetteur à mercure, lampe à décharge à basse pression, système d'éclairage et dispositif d'affichage à cristaux liquides - Google Patents

Émetteur à mercure, procédé de fabrication d'une lampe à décharge à basse pression utilisant l'émetteur à mercure, lampe à décharge à basse pression, système d'éclairage et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2009098860A1
WO2009098860A1 PCT/JP2009/000400 JP2009000400W WO2009098860A1 WO 2009098860 A1 WO2009098860 A1 WO 2009098860A1 JP 2009000400 W JP2009000400 W JP 2009000400W WO 2009098860 A1 WO2009098860 A1 WO 2009098860A1
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WIPO (PCT)
Prior art keywords
mercury
emitter
mercury emitter
glass tube
pressure discharge
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Application number
PCT/JP2009/000400
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English (en)
Japanese (ja)
Inventor
Masaki Kibe
Keiko Kurata
Kazuyuki Okano
Hikoji Okuyama
Yasufumi Funato
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Panasonic Corporation
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Publication date
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Priority to CN2009801014437A priority Critical patent/CN101903973A/zh
Priority to JP2009552403A priority patent/JPWO2009098860A1/ja
Publication of WO2009098860A1 publication Critical patent/WO2009098860A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within 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
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/395—Filling vessels

Definitions

  • the present invention relates to a mercury emitter, a method for producing a low-pressure discharge lamp using the same, a low-pressure discharge lamp, an illumination device, and a liquid crystal display device.
  • a mercury emitter containing mercury is used. That is, after this mercury emitter is placed in a glass tube that serves as an arc tube, it is heated from the outside so that mercury is released by the heat.
  • the temperature of the mercury emitter may be about 400 [° C.].
  • a mercury emitter that is stable up to this temperature for example, titanium (Ti ) Sintered body and mercury (Hg) are used to form Ti 3 Hg (see, for example, Patent Document 1).
  • the heating temperature is preferably set to 400 [° C.] to 800 [° C.]. This is because when mercury is released at a temperature lower than 400 [° C.], the working environment is deteriorated due to mercury being released by heating during exhaust of the low-pressure discharge lamp, while higher than 800 [° C.]. This is because, when released at a temperature, the portion of the glass tube in contact with the mercury emitter is melted by the heat of the mercury emitter itself and may be damaged.
  • the mercury emitter when a mercury emitter having a low mercury emission efficiency is used as described above, the mercury emitter needs to contain more mercury than is necessary for lighting the low-pressure discharge lamp. However, since mercury is a harmful substance, it is not environmentally preferable to use excessive mercury.
  • TiHg TiHg
  • Ti x Hg as described in page 1352 of Binary Alloy Phase Diagram (First Printing, October 1986) issued by AMERICA SOCIETY FOR METALS as well as Ti 3 Hg. (X is 1.73 at room temperature).
  • TiHg has excellent mercury release efficiency at temperatures higher than 400 [° C.], it has the property that Ti and Hg decompose at room temperature, so it releases mercury before the mercury release process. It was found that it is not suitable for manufacturing lamps.
  • the mercury emitter according to the present invention aims to improve mercury emission efficiency and prevent breakage of the glass tube when used in the manufacture of a low-pressure discharge lamp.
  • the low-pressure discharge lamp manufacturing method according to the present invention aims to prevent breakage of the glass tube and reduce the amount of mercury used.
  • the low-pressure discharge lamp, the illumination device, and the liquid crystal display device according to the present invention aim to reduce the amount of mercury used.
  • a mercury emitter has a mercury emitting portion containing an intermetallic compound of titanium (Ti) and mercury (Hg), and the intermetallic compound is Ti 1.73 Hg. It is characterized by including.
  • the intermetallic compound has the amount of mercury in the range of 40 wt% to 100 wt% with respect to the total mercury amount of the mercury emitting portion. It preferably contains 1.73 Hg.
  • the balance of the intermetallic compound except Ti 1.73 Hg is Ti 3 Hg.
  • the mercury emitting part is stored in a container having an opening part at least in part.
  • the container is preferably formed of at least one of iron and nickel.
  • the mercury emitter according to the present invention preferably includes a sintered body portion composed of the mercury releasing material and a metal sintered body covering the mercury releasing material.
  • the sintered body portion is preferably formed in a porous shape.
  • the sintered body portion preferably has a porosity of 5% or more.
  • the method for manufacturing a low-pressure discharge lamp according to the present invention includes a step of inserting the mercury emitter into a glass tube and a step of heating the mercury emitter.
  • a low-pressure discharge lamp includes a glass tube, a lead wire sealed at at least one end portion of the glass tube, and an electrode attached to an end portion of the lead wire located inside the glass tube.
  • the mercury emitter according to claim 1 is fixed to a portion of the lead wire located in the glass tube or the electrode.
  • An illumination device includes the low-pressure discharge lamp.
  • a liquid crystal display device includes the illumination device.
  • the mercury emitter according to the present invention can improve mercury emission efficiency and prevent breakage of the glass tube when used in the manufacture of a low-pressure discharge lamp.
  • the low-pressure discharge lamp manufacturing method according to the present invention can prevent breakage of the glass tube and reduce the amount of mercury used.
  • the low-pressure discharge lamp, the lighting device, and the liquid crystal display device according to the present invention can reduce the amount of mercury used.
  • the perspective view of the mercury discharge body which concerns on the 1st Embodiment of this invention
  • A Front view showing the particle structure of the mercury emitter
  • Photo A conceptual diagram of mercury emission from the same mercury emitter Graph showing measurement results by X-ray analysis of mercury emission part of mercury emitter (A) Front view showing the particle structure of the mercury emitter when the particle shape of the metal not forming an alloy with mercury is spherical, (b) Plan view showing the particle structure of the mercury emitter Diagram showing the relationship between reaction time and intermetallic compound formation rate Diagram showing change in mercury release rate with heating temperature Manufacturing process diagram of mercury emitter according to the first embodiment of the present invention The perspective view of the mercury discharge body which concerns on the 2nd Embodiment of this invention Similarly perspective view of Modification 1 of the mercury emitter The perspective view of the mercury emitter which concerns on the 3rd Embodiment of this invention Conceptual diagram of steps A to G of the method for manufacturing a low-pressure discharge lamp according to the fourth embodiment of the present invention.
  • FIG. 18 (a) Front view of lighting apparatus according to ninth embodiment of the present invention, (b) Cross-sectional view taken along line AA 'in FIG. 18 (a) The perspective view of the liquid crystal display device which concerns on the 10th Embodiment of this invention.
  • the perspective view of the modification 1 of the mercury discharge body which concerns on the 1st Embodiment of this invention (A) Front view of modified example 1 of the mercury emitter, and (b) Plan view of modified example 1 of the mercury emitter.
  • the perspective view of the modification 2 of the mercury emitter which concerns on the 1st Embodiment of this invention (A) Front view of modified example 2 of the mercury emitter, and (b) Plan view of modified example 2 of the mercury emitter.
  • FIG. 1 is a perspective view of the mercury emitter according to the first embodiment of the present invention
  • FIG. 2A is a front view showing its particle structure
  • FIG. 2B is a plan view thereof
  • FIG. Cross-sectional photographs including the central axis are shown in FIG.
  • the mercury emitter 100 includes an intermetallic compound Ti 1.73 Hg of titanium (Ti) and mercury (Hg).
  • the mercury emitter 100 includes a mercury emitter 101 and a sintered body portion 102 made of a metal sintered body covering the mercury emitter 101.
  • the mercury emitting portion 101 is heated during heating (particularly during high frequency heating) as shown in FIG.
  • Mercury can be released not only from both exposed end faces but also from almost the entire surface through a porous sintered body 102 described later (see arrow 103).
  • the surface of the mercury emitting portion is made of a metal plate or the like. It is possible to improve the mercury emission efficiency as compared with the case where it is covered, and even when heated at a stroke, it is possible to prevent the mercury emission part 101 from suddenly expanding and bursting due to vaporized mercury. it can.
  • the mercury emitting portion 101 and the sintered body portion 102 react at the interface, the adhesion strength between the mercury emitting portion 101 and the sintered body portion 102 is high, and the mercury emitting portion 101 spills from the mercury emitting body 100. Can be prevented.
  • Mercury emitting part 101 is formed of an alloy of titanium and mercury, contains an intermetallic compound of titanium and mercury, and contains Ti 1.73 Hg as an intermetallic compound.
  • alloy as used herein includes at least “intermetallic compounds” and also includes “mixtures”, “solid solutions”, and the like.
  • the composition ratio of titanium and mercury in the intermetallic compound Ti 1.73 Hg is about 1.73 at room temperature, but it is 1.09 or more depending on various conditions such as temperature. It can take a value within the range of 1.73 or less.
  • FIG. 4 shows a graph showing measurement results by X-ray analysis of the mercury emission part of the mercury emitter 100. It can be seen that the mercury emitter 100 contains Ti 1.73 Hg and Ti 3 Hg as intermetallic compounds.
  • the mercury emitting portion 101 has a cylindrical shape with a length L of 3 [mm] and an outer diameter Di of 1 [mm], and the mercury content is about 6 [mg].
  • the mercury emitting portion 101 includes ceramics that is a sintered body of one or more metal oxides of titanium oxide (TiO 2 ), aluminum oxide (Al 2 O 3 ), and silicon oxide (SiO 2 ). It may be.
  • the size of the mercury discharge portion 101 remains constant, and when it is desired to reduce the mercury content, the density of the reduced mercury content is replenished, Compared with the case where the mercury content is simply reduced, the thermal conductivity of the mercury emitting portion 101 can be increased, and the heating efficiency of the mercury emitting portion 101 can be increased.
  • the ceramic is contained within a range of 5 wt% to 30 wt% of the mercury emission part.
  • the density of the reduced mercury content is appropriately supplemented, and the thermal conductivity of the mercury emitting portion 101 is made to be higher than when the mercury content is simply reduced.
  • the heating efficiency of the mercury discharge part 101 can be increased.
  • the sintered body portion 102 is made of a metal sintered body that does not form an alloy with mercury, and has a porous shape.
  • Metal that does not form an alloy with mercury means, for example, an alloy that hardly reacts with mercury, such as at least one of iron (Fe), nickel (Ni), cobalt (Co), and manganese (Mn). It is a metal that is difficult to do. Among these, considering chemical properties and industrial productivity (cost and the like), at least one of iron (Fe) and nickel (Ni) is preferable.
  • the metal which comprises the sintered compact part 102 is not restricted to only one kind of metal only of iron or nickel,
  • a metal obtained by applying nickel plating to iron can have an effect of preventing oxidation (corrosion prevention) of iron.
  • the fluidity of the blended powder of iron powder and nickel powder can be improved, and the productivity at the time of molding can be improved.
  • nickel has a lower specific heat than iron and a higher thermal conductivity, it is possible to improve the heating efficiency of the sintered body 102.
  • the sintered body 102 has, for example, a length L of 3 [mm] and an outer diameter Do of 1.4 [mm].
  • the porosity of the sintered body portion 102 having a porous shape is preferably 5% or more. In this case, mercury can easily pass through the sintered body portion 102, and the mercury emission efficiency can be increased.
  • the porosity of the sintered body portion 102 is more preferably 25 [%] or more.
  • the mercury emitted from the mercury emitting portion 101 can easily pass through the sintered body portion 102, and the mercury releasing efficiency can be further increased.
  • the porosity of the sintered compact part 102 is 60 [%] or less. If the ratio is larger than 60%, the sintered body portion 102 becomes full of pores. For example, when the mercury emitter 100 is heated at a high frequency, the heating efficiency of the mercury emitter 101 is lowered and uneven heating occurs. This is because the amount of mercury released tends to vary.
  • the porosity of the sintered body portion 102 is calculated by the following mathematical formula.
  • the density of the sintered body 102 is determined by dissolving the mercury emitter 100 in a mixed solution of hydrofluoric acid and nitric acid, and then quantitatively analyzing it with an ICP emission analyzer (ICPS-8000) manufactured by Shimadzu Corporation. It can be obtained by obtaining the weight of the bonded part 102 and dividing by the volume of the sintered part 102.
  • the volume of the sintered body portion 102 is the volume when there is no void in the sintered body portion 102. Will be used.
  • the theoretical density of the sintered body portion 102 is an imaginary density obtained on the assumption that the sintered body portion 102 has no voids.
  • the metal which comprises the sintered compact part 102 is a magnetic body.
  • the metal which comprises the sintered compact part 102 is a magnetic body.
  • iron (Fe), nickel (Ni), cobalt (Co), or the like can be selected as the metal that is a magnetic substance.
  • a getter material may be mixed in the sintered body portion 102.
  • an impurity gas such as hydrogen (H 2 ) or oxygen (O 2 ) can be adsorbed, thereby improving the purity of the sealed gas in the glass tube.
  • the getter material for example, tantalum (Ta), niobium (Nb), zirconium (Zr), chromium (Cr), hafnium (Hf), aluminum (Al), or an alloy thereof can be applied.
  • the ratio of the surface area of the portion in contact with the sintered body portion 102 out of the total surface area of the mercury emitting portion 101 is preferably 30% or more. In this case, it is possible to obtain a very high mercury emission efficiency by increasing the heating efficiency by increasing the thermal conductivity with respect to the mercury emission part 101.
  • the ratio of the surface area of the portion in contact with the sintered body portion 102 of the total surface area of the mercury discharge portion 101 is 50% or more.
  • the “surface area of the portion in contact with the sintered body portion 102” is calculated from the contour of the outermost surface, not including the surface area of the porous internal voids, because the sintered body portion 102 is porous. Surface area.
  • the particle size of the metal that does not form an alloy with mercury in the sintered body portion 102 is preferably in the range of 5 [ ⁇ m] to 40 [ ⁇ m]. In this case, it is easy to permeate mercury emitted from the mercury emitting portion 101, and the mercury emission efficiency can be improved.
  • the particle shape of the sintered body portion 102 shown in FIGS. 2A to 2C is a scaly shape, but it is not necessarily a scaly shape and may be a polygonal shape or the like. However, in the case of a scale shape, the porosity of the sintered body portion 102 can be increased, and the mercury release efficiency can be further improved.
  • the particle shape of the metal that does not form an alloy with mercury in the sintered body portion 102 may be a spherical shape.
  • FIG. 5A is a front view showing the particle structure of the mercury emitter 100 when the particle shape of the metal that does not form an alloy with mercury in the sintered body portion 102 is spherical, and FIG. ) Respectively.
  • the fluidity is improved, and in the extrusion process for forming the mercury emitter 100 as described later, it can be extruded from the molding machine with a high yield, and the productivity can be improved.
  • the shape of the sintered body portion 102 is preferably a cylindrical shape that covers the outer peripheral surface excluding the end face of the mercury emitting portion 101, as shown in FIGS. 5 (a) and 5 (b).
  • the eddy current generated by the high frequency heating flows to the inner surface closed in a cylindrical shape, and the heating efficiency of the mercury discharge part 101 can be increased.
  • Ti 1.73 Hg has an intermediate composition between Ti 3 Hg and TiHg because it has an intermediate composition between Ti 3 Hg and TiHg.
  • the phase diagram of titanium and mercury described on page 1352 of Binary Alloy Phase Diagram (First Printing, October 1986) issued by AMERICA SOCIETY FOR METALS the conditions for stable formation of Ti 1.73 Hg can be determined. There wasn't.
  • the inventors changed the number of sintered bodies to be added to the heating container and the amount of mercury to react, thereby causing a reaction time at a constant temperature shown in FIG. 6 (time for titanium and mercury to react), We succeeded in clarifying the relationship between the mercury content of each intermetallic compound and the total mercury content in the mercury emission part.
  • the solid line represents Ti 1.73 Hg
  • the broken line represents TiHg
  • the alternate long and short dash line represents Ti 3 Hg.
  • the composition ratio was calculated
  • the reaction between titanium and mercury in the sintered body changes depending on the reaction temperature, the amount of titanium put into the heating container (surface area of titanium), the amount of mercury put into the heating container, and delays the progress of the reaction. 1.73 Hg production can be confirmed. For example, when the reaction temperature is lowered, the progress of the reaction is slow (that is, the graph of FIG.
  • the inventors found from the results of Experiment 1 that the mercury emitter 100 was produced by controlling the progress of the reaction between titanium and mercury.
  • Example 2 Next, the inventors conducted an experiment to measure the mercury emission amount in order to confirm that the mercury emission body 100 has improved mercury emission efficiency over the conventional mercury emission body.
  • the mercury discharge part has a diameter of 1 [mm]
  • the sintered body part has an outer diameter of 1.4 [mm]
  • a length of 3 [mm] and 6 [mg] of mercury.
  • the contained mercury emitter 100 was used.
  • the example in which the intermetallic compound contains Ti 1.73 Hg having a mercury amount of 20 [wt%] with respect to the mercury amount in the mercury emitting portion is set as Example 1, and the mercury amount in the mercury emitting portion is also the same.
  • Te 40 and example 2 shall include Ti 1.73 Hg with a mercury content of [wt%], also contains Ti 1.73 Hg with a mercury content of 60 [wt%] with respect to the mercury content of mercury-emitting portion Example 3 was used, and Example 4 was also used in which Ti 1.73 Hg having a mercury amount of 90 wt% with respect to the mercury amount in the mercury emission part was included.
  • Example 1 to 4 the same size as in Examples 1 to 4 containing the same amount of mercury, an intermetallic compound formed of Ti 3 Hg, and no Ti 1.73 Hg was used.
  • the Example and the comparative example were produced by changing the temperature while the reaction time of mercury was constant.
  • the ratio of Ti 1.73 Hg in the intermetallic compound contained in the mercury emission part was specified by the following method. (1) Immerse the mercury emitter in aqua regia. Thereby, Ti 1.73 Hg and Ti 3 Hg, which are intermetallic compounds, of the mercury emitters dissolve into the aqua regia. At this time, if single titanium (Ti) remains in the mercury emitter, it remains as a residue. (2) determine the ratio of titanium and mercury in the intermetallic compound by quantifying by Shimadzu Corporation in an ICP emission spectrometer the amount of melted titanium and mercury aqua regia (ICPS-8000), Ti 1.73 From the ratio calculation of Hg and Ti 3 Hg, the ratio of Ti 1.73 Hg in the metal compound was specified.
  • the mercury emitting body contains simple substance Hg and TiHg
  • the substance is soaked in nitric acid before being immersed in aqua regia, and the simple substance Hg and TiHg are dissolved for quantification.
  • Ti 1.73 Hg and Ti 3 Hg do not dissolve in nitric acid.
  • the heating temperature exceeds 400 [° C.] and mercury starts to be released around 500 [° C.], but the mercury emission rate at the heating temperature of 800 [° C.] is large. The result was different.
  • the intermetallic compound contains Ti 1.73 Hg (Examples 1 to 4 in the figure), mercury emission formed with conventional Ti 3 Hg at a heating temperature of 800 ° C. It can be confirmed that the mercury emission efficiency is improved as compared with the body (comparative example in the figure). It can also be confirmed that the mercury emission efficiency of the mercury emitter improves as the proportion of Ti 1.73 Hg in the intermetallic compound increases. That is, when Ti 1.73 Hg is contained in the intermetallic compound present in the mercury emitting part, the mercury releasing efficiency can be improved as compared with the conventional mercury emitting body.
  • the intermetallic compound contains Ti 1.73 Hg having a mercury amount in the range of 40 wt% to 100 wt% with respect to the mercury amount in the mercury emitting portion (Examples 2 to 4 in the figure). 4).
  • a heating temperature of 800 [° C.] about 6 [times] of mercury can be released compared to a conventional mercury emitter.
  • Ti 1.73 Hg having a mercury amount in the range of 60 [wt%] or more and 100 [wt%] or less with respect to the mercury amount in the mercury emitting portion is included (Examples 3 and 4 in the figure). Is more preferable. In this case, mercury of 50% or more of the mercury content can be released at 800 [° C.].
  • the intermetallic compound contains Ti 1.73 Hg having a mercury amount in the range of 90 [wt%] or less with respect to the mercury amount in the mercury emitting part, but all of the intermetallic compound is Ti 1.73 Hg. Needless to say, it is preferable to include Ti 1.73 Hg having a mercury amount in the range of 100 wt% or less with respect to the mercury amount in the mercury emitting portion.
  • the remainder of the intermetallic compound except Ti 1.73 Hg is Ti 3 Hg.
  • the intermetallic compound contains Ti 3 Hg, and generation of TiHg that decomposes at room temperature can be substantially suppressed (to the extent that it cannot be measured), and mercury can be produced at a low temperature such as 100 ° C. It can be prevented from being released (this can also be inferred from the fact that the intermetallic compound of the comparative example of FIG. 7 is made of Ti 3 Hg).
  • FIG. 1 A process diagram of the manufacturing process is shown in FIG. 1
  • raw material powder is prepared. Specifically, for example, titanium powder, which is a material of the mercury emitting portion 101, or iron powder, which is a material of the sintered body portion 102, is used.
  • titanium powder and iron powder are separately mixed with a binder, various additives, and water, and sufficiently kneaded.
  • the binder is, for example, methyl cellulose.
  • the titanium clay and the iron clay are put into first and second extrusion molding machines (not shown), respectively.
  • This second extrusion molding machine is provided with a coaxial two-layer extrusion die.
  • a rod-shaped titanium molded body is derived from the first extrusion molding machine, the titanium molded body is introduced into the die portion of the second extrusion molding machine, and a cylindrical body having a coaxial structure in which iron clay is laminated on the outside.
  • a shaped molded body is continuously formed.
  • this molded object is dried until it becomes predetermined
  • the molding method is not limited to extrusion molding, and press molding, a method of forming a titanium clay into a rod shape, and then dipping it into slurryed iron can be used.
  • the molded body is cut to a predetermined length.
  • the mercury content in the mercury emitter 100 can be adjusted to a desired amount by the length to be cut.
  • the mercury content of the mercury emitter 100 can be adjusted by changing the binder amount of the titanium clay, the outer diameter of the mercury emitting portion 101, the firing temperature in the firing step, and the like.
  • the compact is heated in an argon atmosphere at, for example, 500 [° C.] to remove the binder in the compact. And it sinters, for example at 900 [degreeC] in a vacuum atmosphere, and a sintered compact is produced.
  • the sintered body and mercury are put into a heating container, and the heating container is evacuated using a vacuum pump, and at a temperature of about 500 [° C.] to 600 [° C.], for example, 4 [h] to 16 [ h]
  • a degree of heating titanium constituting the sintered body and mercury in the heating container are alloyed to form the mercury discharge portion 101. At this time, Ti 1.73 Hg is generated in the mercury emitting portion 101.
  • the glass tube can be prevented from being damaged when used in the manufacture of a low-pressure discharge lamp.
  • FIG. 9 shows a perspective view of a mercury emitter according to the second embodiment of the present invention.
  • the mercury emitter 101 is covered with the sintered metal portion 102 of the metal, but the mercury emitter 200 according to the second embodiment of the present invention (hereinafter referred to as the following).
  • the “mercury emitter 200” is substantially the same as the first embodiment of the present invention except that the mercury emitting part is housed inside a container 202 having an opening 201 at least partially. It has a configuration.
  • the container 202 has a cylindrical shape made of, for example, iron and has an outer diameter of 1.4 [mm], an inner diameter of 1 [mm], and a height of 3 [mm]. Since the container 202 is cylindrical, it has the opening part 201 in the both ends. When the mercury emitter 200 is heated, mercury can be emitted from the mercury emitter 101 through the opening 201.
  • the material of the container 202 is not limited to iron but is preferably a magnetic material.
  • the arrangement position of the mercury emitter 200 can be adjusted by a magnetic force.
  • the metal that is a magnetic substance for example, iron (Fe), nickel (Ni), cobalt (Co), or the like can be selected. Among these, considering chemical properties and industrial productivity (cost and the like), at least one of iron (Fe) and nickel (Ni) is preferable.
  • the metal which comprises the container 202 is not restricted to one kind of metal only of iron or nickel,
  • the metal which comprises the container 202 is not restricted to one kind of metal only of iron or nickel,
  • a metal obtained by applying nickel plating to iron can have an effect of preventing oxidation (corrosion prevention) of iron.
  • the shape of the container 202 is not limited to a cylindrical shape, and may be a polyhedral shape such as a trapezoidal cylinder as shown in FIG.
  • the contact area with the glass tube can be reduced when the mercury emitter 203 is inserted into the glass tube. Can be prevented from being damaged.
  • a slit 205 may be provided on the side surface of the container 204.
  • mercury can be discharged from the mercury discharge portion 101 inside the container via the slit 205, so that the mercury discharge efficiency can be improved.
  • the opening of the container in this case includes not only the opening 206 at both ends of the container but also the slit 205.
  • raw material powder is prepared.
  • a mercury alloy powder for example, an alloy powder of titanium and mercury that serves as a material for the mercury emitting portion 101 is prepared.
  • the mercury discharge part 101 is shape
  • the mercury discharge part 101 is disposed in the containers 202 and 204.
  • the containers 202 and 204 are formed by winding a plate material made of iron (Fe) or nickel (Ni) around the cylindrical mercury discharge portion 101, and at the same time, the mercury discharge portion 101 is arranged in the container. As a result, the mercury emitters 200 and 203 can be produced.
  • the mercury emitter 200 by inserting the mercury discharge part 101 into the container 202 formed into a cylindrical shape (for example, a cylindrical shape).
  • the mercury emitters 200 and 203 according to the second embodiment of the present invention by changing the amalgam component, the mercury emission efficiency is improved over the conventional one, and the mercury is sufficient. Therefore, it is not necessary to continue heating at a high temperature for a long time, so that the glass tube can be prevented from being damaged when used in the manufacture of a low-pressure discharge lamp.
  • FIG. 11 shows a perspective view of a mercury emitter according to the third embodiment of the present invention.
  • a mercury emitter 300 (hereinafter referred to as “mercury emitter 300”) according to the third embodiment of the present invention is configured by only the mercury emitter 101 without the sintered body 102 and the containers 202 and 204. Except for the point, it has substantially the same configuration as the mercury emitter according to the first and second embodiments of the present invention.
  • Mercury emitter 300 is composed of a cylindrical mercury emitter.
  • the mercury emitter 300 has a diameter of 1.4 [mm] and a length of 3 [mm].
  • the shape of the mercury emitter 300 is not limited to a cylindrical shape.
  • a spherical shape, a polyhedron shape, or the like may be used.
  • the mercury emitting part 101 may contain a magnetic material.
  • a magnetic force For example, iron (Fe), nickel (Ni), cobalt (Co), or the like can be selected as the metal that is a magnetic substance. Among these, considering chemical properties and industrial productivity (cost and the like), at least one of iron (Fe) and nickel (Ni) is preferable.
  • raw material powder is prepared. Specifically, it is, for example, titanium powder that is used as a material for the mercury emitting portion 101.
  • a binder for example, methyl cellulose.
  • a titanium clay is produced.
  • the molding process Next, the titanium clay is put into an extrusion molding machine (not shown). And a rod-shaped titanium molded object is derived
  • the molding method is not limited to extrusion molding, and a method such as press molding can be used.
  • the molded body is cut to a predetermined length.
  • the mercury content in the mercury emitter 300 can be adjusted to a desired amount by the cut length.
  • the mercury content of the mercury emitter 300 can be adjusted by changing the binder amount of the titanium clay, the outer diameter of the mercury emitting portion 101, the firing temperature in the firing step, and the like.
  • the cut process may be omitted when the finished product is molded to the size of one finished product by press molding or the like.
  • the compact is heated in an argon atmosphere at, for example, 500 [° C.] to remove the binder in the compact. And it sinters, for example at 900 [degreeC] in a vacuum atmosphere, and a sintered compact is produced.
  • the sintered body and mercury are put into a heating container, and the heating container is evacuated using a vacuum pump, and at a temperature of about 500 [° C.] to 600 [° C.], for example, 4 [h] to 16 [ h] Heat about to alloy titanium and mercury.
  • the mercury emitter 300 since the mercury emitter 300 contains Ti 1.73 Hg, the mercury emission efficiency is improved and the mercury is sufficiently released. However, since it is not necessary to continue heating for a long time and at a high temperature, the glass tube can be prevented from being damaged when used for manufacturing a low-pressure discharge lamp.
  • the method for manufacturing a low-pressure discharge lamp according to the fourth embodiment of the present invention is a method for manufacturing a low-pressure discharge lamp in which the mercury emitter is taken out during the manufacturing process and the finished lamp has no mercury emitter.
  • a method for manufacturing a low-pressure discharge lamp according to a fourth embodiment of the present invention includes a step of inserting a mercury emitter according to the first embodiment of the present invention into a glass tube, and a step of heating the mercury emitter. Is included.
  • FIG. 12 shows a schematic diagram of steps A to G of the manufacturing process
  • FIG. 13 shows a schematic diagram of steps H to J, respectively.
  • the prepared straight tubular glass tube 400 is suspended and its lower end is immersed in the phosphor suspension 402 in the tank 401.
  • the phosphor suspension 402 contains, for example, blue, red, and green phosphor particles.
  • This siphoning is set so that the liquid level becomes a predetermined height of the glass tube 400 by detecting the liquid level with the optical sensor 403.
  • the liquid level error at this time is relatively large because of the influence of the viscosity of the phosphor suspension 402, the surface tension of the liquid level, and the like, and an error of about ⁇ 0.5 [mm] occurs.
  • a brush or the like 404 is inserted into the inner surface of the glass tube 400 to remove unnecessary phosphor portions at the end of the glass tube 400.
  • the glass tube 400 is transferred into a heating furnace (not shown), and the phosphor particles adhering to the inner surface of the glass tube 400 are baked to obtain the phosphor layer 405.
  • the electrode unit 409 including the electrode 406, the bead glass 407, and the lead wire 408 is inserted into one end of the glass tube 400 on which the phosphor layer 405 is formed, and then temporarily fixed.
  • Temporary fixing means that the outer peripheral portion of the glass tube 400 where the bead glass 407 is positioned is heated by the burner 410 and a part of the outer periphery of the bead glass 407 is fixed to the inner peripheral surface of the glass tube 400. Since only a part of the outer periphery of the bead glass 407 is fixed, the air permeability of the glass tube 400 in the tube axis direction is maintained.
  • the electrode 40 is a so-called cold cathode type.
  • the glass tube 400 is turned upside down, the electrode 411 having substantially the same configuration as the electrode unit 409, the bead glass 412 and the lead wire are placed on the glass tube 400 from the side opposite to the side where the electrode unit 409 is inserted.
  • the outer peripheral part of the glass tube 400 in which the bead glass 412 is located is heated with the burner 415, and the glass tube 400 is sealed and airtightly sealed (first sealing). Further, the error from the set value of the sealing position in the first sealing is about 0.5 [mm].
  • the insertion position of the electrode unit 409 in the process C and the insertion of the electrode unit 414 in the process D are the lengths of the non-existing regions of the phosphor layer 405 respectively extending from both ends of the glass tube after sealing both ends of the glass tube. It is preferable that the insertion amount is adjusted so that the positions are different.
  • the electrode unit 414 on the other end side is inserted from the position overlapping the phosphor layer 405 to the back as compared with the electrode unit 409 on the one end side.
  • the reason why such a configuration is suitable is as follows.
  • Luminance unevenness occurs as a whole device.
  • the senor is surely used.
  • the longitudinal direction can be identified.
  • the sensor can be used more reliably in the longitudinal direction. Orientation can be identified.
  • the image sensor may have a measurement accuracy in units of 0.5 [mm].
  • the upper limit of the difference in length is, for example, about 8 [mm]. This is because if it exceeds 8 [mm], the non-existing region of the phosphor layer 405 that does not contribute to light emission becomes long, and it becomes difficult to ensure an effective light emission length.
  • the exhaust in the glass tube 400 and the filling of the sealed gas into the glass tube 400 are sequentially performed.
  • the head of the air supply / exhaust device (not shown) is attached to the end of the glass tube 400 on the mercury emitter 100 side, and first, the inside of the glass tube 400 is evacuated to a vacuum and the heating device (FIG.
  • the entire glass tube 400 is heated from the outer periphery by not shown).
  • the temperature of the glass tube becomes about 400 [° C.], and the impure gas in the glass tube 400 including the impure gas entering the phosphor film 405 is discharged.
  • a predetermined amount of sealed gas for example, a mixed rare gas such as a mixed gas having a partial pressure ratio of argon: 95 [%], neon: 5 [%], etc.
  • step H shown in FIG. 13 the mercury emitter 100 is induction-heated by a high-frequency oscillation coil (not shown) disposed around the glass tube 400 to release mercury from the mercury emitter 100 (mercury emitter).
  • Step of heating 100 As a method for heating the mercury emitter 100, various known methods such as heating with a gas burner or light heating can be used. Thereafter, the glass tube 400 is heated in the heating furnace 418, and the released mercury is moved toward the electrode 411 of the electrode unit 414.
  • the mercury emitter 100 described in the first embodiment is used, so that mercury is sufficiently released.
  • the amount of mercury contained in the mercury emitter 100 can be reduced, in other words, the amount of mercury used for the lamp can be reduced, and the environment can be reduced. The load on can be reduced.
  • the case where the mercury emitter 100 according to the first embodiment of the present invention is used has been described.
  • the mercury emitters 200 and 203 according to the second embodiment of the present invention are also described.
  • the mercury emitter 300 according to the third embodiment of the present invention and other mercury emitters according to modifications described later can also be used.
  • FIG. 14A is a cross-sectional view including a tube axis of a low-pressure discharge lamp 500 (hereinafter simply referred to as “lamp 500”) according to the fifth embodiment of the present invention, and FIG. ) Respectively.
  • the lamp 500 is a cold cathode fluorescent lamp, and unlike the low-pressure discharge lamp manufactured by the low-pressure discharge lamp manufacturing method according to the fourth embodiment of the present invention, the lamp 500 is.
  • the mercury emitter 501 remains inside.
  • the lamp 500 includes a glass tube 502, an electrode 503, and a lead wire 504.
  • the glass tube 502 is a straight tube, and a cross section cut perpendicularly to the tube axis has a substantially circular shape.
  • the glass tube 502 has, for example, an outer diameter of 3.0 [mm], an inner diameter of 2.0 [mm], and a total length of 750 [mm], and the material thereof is borosilicate glass.
  • the dimensions of the lamp 500 shown below are values corresponding to the dimensions of the glass tube 502 having an outer diameter of 3.0 [mm] and an inner diameter of 2.0 [mm].
  • the inner diameter is in the range of 1.4 [mm] to 7.0 [mm]
  • the thickness is in the range of 0.2 [mm] to 0.6 [mm]. It is preferable that the total length is 1500 [mm] or less. These values are examples and are not limited to these.
  • mercury is sealed at a predetermined ratio, for example, 0.6 [mg / cc] with respect to the volume of the glass tube 502 (the volume in a state where the end portion is sealed),
  • a rare gas such as argon or neon is sealed at a predetermined sealing pressure, for example, 60 [Torr].
  • a phosphor layer 505 is formed on the inner surface of the glass tube 502.
  • the phosphor particles used for the phosphor layer 505 are, for example, red phosphor particles (Y 2 O 3 : Eu 3+ ), green phosphor particles (LaPO 4 : Ce 3+ , Tb 3+ ) and blue phosphor particles ( BaMg 2 Al 16 O 27 : Eu 2+ ).
  • a protective film (not shown) of a metal oxide such as yttrium oxide (Y 2 O 3 ) may be provided between the inner surface of the glass tube 502 and the phosphor layer 505.
  • lead wires 504 are led out from both ends of the glass tube 502 to the outside.
  • the lead wire 504 is sealed at both ends of the glass tube 502 through the bead glass 506.
  • the lead wire 504 is, for example, a joint consisting of an internal lead wire 504a made of tungsten and an external lead wire 504b made of nickel.
  • the inner lead wire 504a has a wire diameter of 1 [mm] and a total length of 3 [mm]
  • the outer lead wire 504b has a wire diameter of 0.8 [mm] and a total length of 5 [mm].
  • a hollow type, for example, a bottomed cylindrical electrode 503 is fixed to the tip of the internal lead wire 504a. This fixing is performed using, for example, laser welding.
  • each part of the electrode 503 are, for example, an electrode length of 5 [mm], an outer diameter of 1.70 [mm], an inner diameter of 1.50 [mm], and a wall thickness of 0.10 [mm].
  • a mercury emitter 501 is fixed between the electrode 503 and the bead glass 506 of at least one of the internal lead wires 504a.
  • the mercury emitter 501 is formed by forming a through hole 501a for passing an internal lead wire through the mercury emitter 100 according to the first embodiment of the present invention. Note that the mercury emitter 501 may be fixed to the electrode 503 instead of the lead wire 504.
  • the mercury emitter 501 having good mercury emission efficiency is used, so the amount of mercury contained in the mercury emitter 501 is reduced. In other words, the amount of mercury used for one lamp can be reduced, and the burden on the environment can be reduced.
  • FIG. 15A is a cross-sectional view including a tube axis of a low-pressure discharge lamp (hereinafter simply referred to as “lamp 600”) according to a sixth embodiment of the present invention, and FIG. Respectively.
  • the lamp 600 is a hot cathode fluorescent lamp, and unlike the low-pressure discharge lamp manufactured by the low-pressure discharge lamp manufacturing method according to the fourth embodiment of the present invention, the lamp 600 is.
  • the mercury emitter 501 remains inside.
  • the lamp 600 is a hot cathode fluorescent lamp, and includes a glass tube 601 and an electrode mount 602.
  • the glass tube 601 has, for example, a total length of 1010 [mm], an outer diameter of 18 [mm], and a wall thickness of 0.8 [mm], and electrode mounts 602 are sealed at both ends thereof.
  • a phosphor layer 505 is formed on the inner surface of the glass tube 601, and mercury (eg, 4 [mg] to 10 [mg]) is sealed inside the glass tube 601 and argon ( A mixed gas of Ar) and krypton (Kr) (for example, a mixed gas having a partial pressure ratio of Ar of 50 [%] and Kr of 50 [%]) is sealed at a sealed gas pressure of 600 [Pa], for example.
  • mercury eg, 4 [mg] to 10 [mg]
  • argon A mixed gas of Ar
  • Kr krypton
  • the electrode mount 602 is a so-called bead glass mount, a tungsten filament electrode 603, a pair of lead wires 604 that support the filament electrode 603, and the pair of lead wires 604. And a bead glass 605 for fixing and supporting.
  • the filament electrode 603 is of a so-called hot cathode type.
  • a mercury emitter 501 is fixed to the lead wire 604 of at least one of the electrode mounts 602.
  • the through hole 501 a of the mercury emitter 501 used here is adapted to the wire diameter of the lead wire 604.
  • a part of the lead wire 604 is sealed to the end of the glass tube 601 in the electrode mount 602, specifically, a part extending from the bead glass 605 to the side opposite to the filament electrode 603. is there.
  • the electrode mount 602 is sealed to the glass tube 601 by, for example, a pinch seal method.
  • an exhaust pipe remaining portion 606 is attached together with the electrode mount 602 to at least one end of the glass tube 601.
  • the exhaust pipe remaining portion 606 is used when exhausting the inside of the glass tube 601 after sealing the electrode mount 602 or enclosing the above-mentioned sealed gas or the like.
  • chip-off sealing is performed at a portion located outside the glass tube 601 in the exhaust pipe remaining portion 606.
  • the mercury emitter 501 having high mercury emission efficiency is used.
  • the amount of mercury used for one lamp can be reduced, and the load on the environment can be reduced.
  • FIG. 16 shows an exploded perspective view of a lighting device 700 according to the seventh embodiment of the present invention.
  • An illuminating device 700 according to a seventh embodiment of the present invention is a direct-type backlight unit, and has a rectangular parallelepiped casing 701 having one open surface and a plurality of lamps housed in the casing 701. 500, a pair of sockets 702 for electrically connecting the lamp 500 to a lighting circuit (not shown), and an optical sheet 703 covering the opening of the housing 701.
  • the lamp 500 is a low-pressure discharge lamp 500 according to the fifth embodiment of the present invention.
  • the housing 701 is made of, for example, polyethylene terephthalate (PET) resin, and a reflective surface 704 is formed by depositing a metal such as silver on the inner surface thereof.
  • PET polyethylene terephthalate
  • the material of the housing 701 may be made of a material other than resin, for example, a metal material such as aluminum or a cold rolled material (for example, SPCC).
  • a reflection sheet whose reflectance is increased by adding calcium carbonate, titanium dioxide, or the like to a polyethylene terephthalate (PET) resin other than a metal vapor deposition film may be attached to the housing 701. .
  • PET polyethylene terephthalate
  • an insulator 705 and a cover 706 are disposed inside the housing 701.
  • the sockets 702 are provided at predetermined intervals in the lateral direction (vertical direction) of the housing 701 corresponding to the arrangement of the lamps 500.
  • the socket 702 is obtained by processing a plate made of stainless steel or phosphor bronze, for example, and has a fitting portion 702a into which the external lead wire 504b is fitted. Then, the external lead wire 504b is fitted by being elastically deformed so as to expand the fitting portion 702a. As a result, the external lead wire 504b fitted into the fitting portion 702a is pressed by the restoring force of the fitting portion 702a and is difficult to come off. Thereby, the external lead wire 504b can be easily fitted into the fitting portion 702a, but can be made difficult to come off.
  • the socket 702 is covered with an insulator 705 so that the sockets 702 adjacent to each other are not short-circuited.
  • the insulator 705 is made of, for example, polyethylene terephthalate (PET) resin. Note that the insulator 705 is not limited to the above structure. Since the socket 702 is in the vicinity of the internal electrode 503 that becomes relatively hot during operation of the lamp 500, the insulator 705 is preferably made of a heat resistant material. As a material for the heat-resistant insulator 705, for example, polycarbonate (PC) resin, silicon rubber, or the like can be used.
  • PC polycarbonate
  • a lamp holder 707 may be provided inside the housing 701 inside the housing 701.
  • the lamp holder 707 that fixes the position of the lamp 500 inside the housing 701 is, for example, polycarbonate (PC) resin, and has a shape that follows the outer shape of the lamp 500.
  • the “place as needed” means that the lamp 500 is bent when the lamp 500 has a long length exceeding, for example, 600 [mm], as in the vicinity of the central portion of the lamp 500 in the longitudinal direction. It is a place necessary to eliminate.
  • the cover 706 separates the socket 702 from the space inside the housing 701.
  • the cover 706 is made of, for example, polycarbonate (PC) resin, keeps the periphery of the socket 702 warm, and highly reflects at least the surface on the housing 701 side. Therefore, the luminance reduction at the end of the lamp 500 can be reduced.
  • PC polycarbonate
  • the opening of the housing 701 is covered with a light-transmitting optical sheet 703 and is sealed so that foreign matters such as dust and dust do not enter inside.
  • the optical sheet 703 is formed by laminating a diffusion plate 708, a diffusion sheet 709, and a lens sheet 710.
  • the diffusion plate 708 is a plate-like body made of, for example, polymethyl methacrylate (PMMA) resin, and is disposed so as to close the opening of the housing 701.
  • the diffusion sheet 709 is made of, for example, a polyester resin.
  • the lens sheet 710 is, for example, a laminate of an acrylic resin and a polyester resin.
  • the lamp with a small amount of mercury used is used, a lighting device with a small environmental load can be realized.
  • FIG. 17 shows a partially cutaway perspective view of a lighting apparatus according to the eighth embodiment of the present invention.
  • An illuminating device 800 according to an eighth embodiment of the present invention (hereinafter referred to as “illuminating device 800”) is an edge light type backlight unit, and includes a reflector 801, a lamp 500, a socket (not shown), and a light guide plate. 802, a diffusion sheet 803, and a prism sheet 804.
  • the reflection plate 801 is disposed so as to surround the surface around the light guide plate 802 except for the liquid crystal panel side (arrow Q), and the bottom surface portion 801b covering the bottom surface of the light guide plate 802 and the side where the lamp 500 is disposed. And a curved lamp side surface portion 801c covering the periphery of the lamp 500, and the light emitted from the lamp is guided from the light guide plate 802 to the liquid crystal panel (not shown) side ( Reflected in the arrow Q).
  • the reflecting plate 801 is made of, for example, a film-like PET deposited with silver or a laminated metal foil such as aluminum.
  • the socket has substantially the same configuration as the socket 702 used in the lighting device 700 according to the seventh embodiment of the present invention.
  • the end of the lamp 500 is omitted for convenience of illustration.
  • the light guide plate 802 is for guiding the light reflected by the reflection plate 801 to the liquid crystal panel side.
  • the light guide plate 802 is made of, for example, translucent plastic and has a bottom surface portion 801b of the reflection plate 801 provided on the bottom surface of the lighting device 800. Are stacked on top of each other.
  • PC polycarbonate
  • COP cycloolefin-based resin
  • the diffusion sheet 803 is for expanding the visual field and is made of, for example, a film having a diffusion transmission function made of polyethylene terephthalate resin or polyester resin, and is laminated on the light guide plate 802.
  • the prism sheet 804 is for improving luminance, 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 803. Note that a diffusion plate may be further stacked on the prism sheet 804.
  • a reflective sheet (not shown) is provided on the outer surface of the glass tube 502 except for a part in the circumferential direction of the lamp 500 (the light guide plate 802 side when inserted into the lighting device 800).
  • An aperture-type lamp may be used.
  • the lamp with a small amount of mercury used is used, it is possible to realize a lighting device with a small environmental load.
  • FIG. 18A shows a front view of a lighting apparatus according to the ninth embodiment of the present invention
  • FIG. 18B shows a cross-sectional view taken along the line AA ′ of FIG. 18A.
  • An illuminating device 900 (hereinafter referred to as “illuminating device 900”) according to a ninth embodiment of the present invention is a luminaire using an annular fluorescent lamp for general illumination.
  • the lighting device 900 includes a main body portion 901, a plate-like portion 902, a lamp holder 903, a socket 904, and a lamp 905.
  • the main body 901 accommodates a lighting circuit (not shown) and the like inside, for example, and an electrical connection part (not shown) is led out from the upper part, for example, the base 906 of the lamp 905 and the electric part from the side part.
  • a socket 904 for connection is provided.
  • the disc-shaped portion 902 is a member that supports the main body portion 901 and the lamp holder 903, and has, for example, a disc-like shape.
  • the lamp holder 903 is attached to the lower surface of the plate-like portion 902, and the lamp 905 can be held by, for example, a C-shaped sandwiching piece provided at the lower end thereof to prevent the lamp 905 from dropping.
  • the lamp 905 is an annular hot-cathode fluorescent lamp
  • the low-pressure discharge lamp 600 according to the sixth embodiment is the same as the low-pressure discharge lamp 600 according to the sixth embodiment except that the shape is annular and the base 906 is located in the middle of the lamp 905. It has substantially the same configuration.
  • the lighting device 900 As described above, according to the configuration of the lighting device 900 according to the ninth embodiment of the present invention, since the lamp with a small amount of mercury used is used, a lighting device with a small environmental load can be realized.
  • FIG. 19 shows an outline of a liquid crystal display device according to the tenth embodiment of the present invention.
  • the liquid crystal display device 1000 is, for example, a 32 [inch] television, and includes a liquid crystal screen unit 1001 including a liquid crystal panel and the like, an illumination device 700 according to the seventh embodiment of the present invention, and a lighting circuit 1002. Prepare.
  • the liquid crystal screen unit 1001 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 is based on an image signal from the outside. To form a color image.
  • a liquid crystal panel color filter substrate, liquid crystal, TFT substrate, etc.
  • a drive module etc.
  • the lighting circuit 1002 turns on the lamp 500 in the lighting device 700.
  • the lamp 500 is operated at a lighting frequency of 40 [kHz] to 100 [kHz] and a lamp current of 3.0 [mA] to 25 [mA].
  • FIG. 19 illustrates the case where the low-pressure discharge lamp 500 according to the fifth embodiment is inserted into the illumination device 700 according to the seventh embodiment of the present invention as the light source device of the liquid crystal display device 1000.
  • the low-pressure discharge lamp 600 according to the sixth embodiment of the present invention can also be applied.
  • the illuminating device 800 which concerns on the 8th Embodiment of this invention can also be used.
  • the liquid crystal display device As described above, according to the configuration of the liquid crystal display device according to the tenth embodiment of the present invention, since a lamp with a small amount of mercury used is used, a liquid crystal display device with a small environmental load can be realized.
  • Modification of mercury emitter (1) Modification 1 A perspective view of Modification 1 of the mercury emitter according to the first embodiment of the present invention is shown in FIG. 20, a front view thereof is shown in FIG. 21 (a), and a plan view thereof is shown in FIG. 21 (b).
  • the first modification of the mercury emitter according to the first embodiment of the present invention (hereinafter simply referred to as “mercury emitter 104”) is the outer shape of the mercury emitter 100 according to the first embodiment of the present invention. The shape is different. Therefore, the shape will be described in detail, and the other points will be omitted.
  • Mercury emitter 104 has a tapered end. Specifically, the end of the sintered body portion 105 of the mercury emitter 104 has a tapered shape 105a.
  • the mercury emitter 104 Since the end of the mercury emitter 104 has a tapered shape, it can be prevented from colliding with other mercury emitters and being damaged when transported. Further, since the end portion of the mercury emitter 104 is tapered, the mercury emitter 104 can be easily put into the glass tube when a low-pressure discharge lamp having a thin tube is manufactured. Note that only one end of the mercury emitter 104 may have a tapered shape.
  • Modification 2 A perspective view of a modified example 2 of the mercury emitter according to the first embodiment of the present invention is shown in FIG. 22, a front view thereof is shown in FIG. 23 (a), and a plan view thereof is shown in FIG. 23 (b).
  • Modification 2 (hereinafter simply referred to as “mercury emitter 106”) of the mercury emitter according to the first embodiment of the present invention is the same as the mercury emitter 100 according to the first embodiment of the present invention.
  • the shape of the discharge part 107 is different. Therefore, the shape will be described in detail, and the other points will be omitted.
  • the mercury emitter 106 has a cylindrical shape in which a through-hole 107a is formed in the axial direction including the central axis of the mercury emitter 107, for example.
  • the mercury emitter 106 Since the mercury emitter 106 has a cylindrical shape, mercury is released from both the inner surface and both sides of the sintered body portion 102 side, and the mercury release efficiency can be further improved. Further, a sintered body portion may be further formed on the inner surface of the mercury emitter 106. In this case, when high-frequency heating is performed, the high-frequency heating eddy current reaches the inner surface of the mercury emitter 106, and the heating efficiency of the mercury discharge portion 107 can be increased to further improve the mercury emission efficiency.
  • the mercury emitter shown in FIGS. 22 and 23 has a cylindrical shape, but is not limited thereto, and may be a polygonal cylindrical shape or the like.
  • the ratio of the diameter Dh of the through hole 107a to the outer diameter Di of the mercury emitting portion 107 is preferably in the range of 5% to 60%. In this case, if Dh is too small, the release efficiency does not increase so much, and if it is too large, a predetermined mercury content cannot be obtained, and the heating efficiency also decreases.
  • FIG. 24 shows a perspective view of Modification 3 of the mercury emitter according to the first embodiment of the present invention.
  • Modification 3 (hereinafter referred to as “mercury emitter 110”) of the mercury emitter according to the first embodiment of the present invention is different in shape from the mercury emitter 100 according to the first embodiment of the present invention. Different. Therefore, the shape will be described in detail, and the other points will be omitted.
  • the mercury emitter 110 has a flat plate shape. Specifically, in the mercury emitter 110, a flat mercury discharge portion 111 is sandwiched between flat plate-like sintered bodies 112. In this case, since the mercury emitting part 111 is sandwiched between the two sintered body parts 112, the heating efficiency of the mercury emitting part 111 is increased, and the mercury releasing efficiency can be further improved. Moreover, since it can produce by press molding by a sheet construction method, a manufacturing process can be simplified more. However, a configuration other than the configuration shown in FIG. 24 (a plate-shaped configuration) may be employed. For example, a mercury emitter 113 shown in FIG. 25 is formed by bending the plate-like structure shown in FIG. 24 into a substantially cylindrical shape.
  • the end surface of the mercury emitter 111 may be covered with the sintered body 112.
  • the end surface of the mercury emitting portion 111 is covered with the sintered body portion 112, and the front surface and the back surface are continuous, so that the efficiency of eddy current can be improved. Can be played.
  • the mercury discharge part 111 is covered with the sintered compact part 112, it is also possible to provide a slit in a part of mercury discharge part (part of the said sintered compact part).
  • a slit in a part of mercury discharge part part of the said sintered compact part.
  • the configuration shown in FIGS. 25 and 26, but said that form slits in a part of the mercury releasing material is formed, for example, with respect to the longitudinal direction of the central axis X 100 of the mercury releasing member 100 shown in FIG. 1 It is also possible to provide slits in parallel, vertically, or diagonally.
  • the mercury emitter may facilitate the release of mercury from the slit, which may improve the mercury emission efficiency. Since the problem of a decrease in current efficiency also occurs, consideration must be given to the design when forming the slit.
  • Modification 4 A perspective view of Modification 4 of the mercury emitter according to the first embodiment of the present invention is shown in FIG.
  • Modification 4 (hereinafter referred to as “mercury emitter 115”) of the mercury emitter according to the first embodiment of the present invention is a flat plate of Modification 3 of the mercury emitter according to the first embodiment of the present invention.
  • a sintered product portion 112 is laminated on a single-sided surface of a mercury discharge portion 111 in a spiral shape.
  • a laminate of the sintered body portion 112 and the mercury discharge portion 111 is wound in a spiral shape so that the sintered body portion 112 finally becomes the outside.
  • one surface of the mercury emitting portion 111 may be covered with the sintered body portion 112, or both surfaces of the mercury emitting portion 111 may be covered with the sintered body portion 112.
  • FIG. 28 shows a perspective view of Modification 5 of the mercury emitter according to the first embodiment of the present invention.
  • Modification 5 (hereinafter simply referred to as “mercury emitter 116”) of the mercury emitter according to the first embodiment of the present invention is different from the mercury emitter 100 according to the first embodiment of the present invention in its shape. Is different. Therefore, the shape will be described in detail, and the other points will be omitted.
  • a band-like sintered body portion 117 is wound around a rod-like mercury emitting portion 101.
  • the mercury emitting body 116 becomes the sintered body portion 117 after molding the rod-shaped body of the mercury emitting portion 101 without extruding the mercury emitting portion 101 and the sintered body portion 117 at the same time. It can be formed by winding clay.
  • Modification 6 A partially cutaway perspective view of Modification 6 of the mercury emitter according to the first embodiment of the present invention is shown in FIG.
  • Modification 6 of the mercury emitter according to the first embodiment of the present invention (hereinafter simply referred to as “mercury emitter 118”) is the shape of the mercury emitter 100 according to the first embodiment of the present invention. Is different. Therefore, the shape will be described in detail, and the other points will be omitted.
  • the mercury emitter 118 is spherical, and the sintered body 120 is laminated on the entire outside of the spherical mercury emitter 119.
  • the mercury emitter 118 Since all the outer sides of the mercury emitter 118 are covered with the sintered body portion 120, when the mercury emitter 118 is transferred, the mercury emitter 118 can be operated without directly touching the mercury emitter 119 containing mercury. , Work safety can be improved. In addition, as long as the mercury discharge
  • the present invention can be widely applied to mercury emitters, low-pressure discharge lamp manufacturing methods using the same, low-pressure discharge lamps, illumination devices, and liquid crystal display devices.

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  • Engineering & Computer Science (AREA)
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  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Discharge Lamp (AREA)

Abstract

L'invention concerne un émetteur à mercure offrant un rendement d'émission de mercure amélioré et susceptible d'éviter le bris d'un tube de verre si ledit émetteur à mercure est utilisé dans la fabrication d'une lampe à décharge à basse pression. L'invention concerne également un procédé de fabrication d'une lampe à décharge à basse pression susceptible d'éviter le bris d'un tube de verre et de réduire la quantité requise de mercure utilisée. L'invention concerne également une lampe à décharge à basse pression susceptible de réduire la quantité requise de mercure utilisée, un système d'éclairage, et un dispositif d'affichage à cristaux liquides. L'émetteur (100) à mercure selon l'invention comprend une partie (101) émettrice de mercure contenant un composé intermétallique entre le titane (Ti) et le mercure (Hg). Le composé intermétallique contient du Ti1,73Hg.
PCT/JP2009/000400 2008-02-06 2009-02-03 Émetteur à mercure, procédé de fabrication d'une lampe à décharge à basse pression utilisant l'émetteur à mercure, lampe à décharge à basse pression, système d'éclairage et dispositif d'affichage à cristaux liquides WO2009098860A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2009801014437A CN101903973A (zh) 2008-02-06 2009-02-03 水银释放体、使用它的低压放电灯的制造方法、低压放电灯、照明装置以及液晶显示装置
JP2009552403A JPWO2009098860A1 (ja) 2008-02-06 2009-02-03 水銀放出体、それを用いた低圧放電ランプの製造方法、低圧放電ランプ、照明装置および液晶表示装置

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JP2008-026195 2008-02-06
JP2008026195 2008-02-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495659B1 (fr) * 1969-10-20 1974-02-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495659B1 (fr) * 1969-10-20 1974-02-08

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