WO2010143345A1 - プラズマディスプレイパネル - Google Patents
プラズマディスプレイパネル Download PDFInfo
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- WO2010143345A1 WO2010143345A1 PCT/JP2010/002238 JP2010002238W WO2010143345A1 WO 2010143345 A1 WO2010143345 A1 WO 2010143345A1 JP 2010002238 W JP2010002238 W JP 2010002238W WO 2010143345 A1 WO2010143345 A1 WO 2010143345A1
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- mgo
- protective layer
- powder
- plasma display
- display panel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/40—Layers for protecting or enhancing the electron emission, e.g. MgO layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
- H01J11/12—AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space
Definitions
- the present invention relates to a plasma display panel (PDP), and more particularly to a technique for improving materials around a protective layer.
- PDP plasma display panel
- PDPs Plasma display panels
- a general PDP structure in practical use has a plurality of electrodes (display electrode pairs or address electrodes) regularly arranged on two opposing glass substrates, which are a front substrate and a back substrate, respectively.
- a dielectric layer such as low melting point glass is provided so as to cover each of these electrodes on the glass substrate.
- a phosphor layer is provided on the dielectric layer of the back substrate.
- an MgO layer is provided on the dielectric layer of the front substrate.
- an MgO layer is provided as a protective layer for protecting the dielectric layer against ion bombardment during discharge and for secondary electron emission.
- the two substrates are internally sealed via the discharge space, and a gas mainly composed of an inert gas such as Ne or Xe is sealed in the discharge space.
- a voltage is applied between the electrodes to generate discharge, thereby causing the phosphor to emit light and display.
- CaO, SrO, BaO and the like are chemically unstable as compared with MgO, and react relatively easily with moisture and carbon dioxide remaining in the air or in the panel, so that hydroxides and carbonates are formed. Form. When such a compound is formed, the secondary electron emission coefficient of the protective layer is lowered, and there is a problem in that the expected voltage reduction effect cannot be obtained.
- the present invention has been made in view of the above problems, and provides a PDP that can be expected to exhibit excellent image display performance with low voltage drive by using a compound having good secondary electron emission characteristics.
- the purpose is to do.
- the present invention includes a plurality of electrodes and a phosphor, and a voltage is applied between any of the plurality of electrodes to cause discharge in a discharge space.
- a plasma display panel that emits light by converting it into visible light, wherein one or more kinds selected from SrCeO 3 and BaCeO 3 or a crystalline oxide made of a solid solution of each of them is disposed in a region facing the discharge space. The configuration.
- a part of Ce contained in the crystalline oxide may be substituted with a trivalent metal or a tetravalent metal.
- the trivalent metal replacing Ce In or rare earth metal is suitable.
- Sn is desirable as the tetravalent metal replacing Ce.
- a first dielectric layer is formed on the surface of a first substrate (front glass substrate) on which a plurality of first electrodes (display electrodes) are formed so as to cover the first electrode.
- the second electrode is placed on the surface of a first panel (front plate) having a protective layer formed on the dielectric layer and a second substrate (back glass substrate) having a plurality of second electrodes (address electrodes) formed thereon.
- a second dielectric layer is formed so as to cover the phosphor, and a phosphor layer is formed on the second dielectric layer.
- the protective layer has the crystallinity of the present invention described above.
- the plasma display panel is configured by using an oxide, and the first panel and the second panel are arranged to face each other with the discharge space interposed therebetween.
- a material made of MgO can be dispersed on the protective layer together with the material in the form of powder particles.
- a first dielectric layer is formed on a surface of a first substrate on which a plurality of first electrodes are formed so as to cover the first electrode, and a protective layer is formed on the first dielectric layer.
- a second dielectric layer is formed on the surface of the first substrate and the second substrate on which the plurality of second electrodes are formed so as to cover the second electrode, and the phosphor is formed on the second dielectric layer.
- the crystalline oxide according to claim 1 is dispersed and arranged in the form of powder particles on the surface of the protective layer, and the first panel and the second panel form a discharge space. The plasma display panel was placed opposite to the sandwich.
- the coverage of the crystalline oxide with respect to the protective layer is 1% or more and 20% or less.
- a material made of MgO may be dispersed and arranged in the form of powder particles on the crystalline oxide.
- the present invention is characterized in that one or more kinds selected from SrCeO 3 and BaCeO 3 , or a crystalline oxide made of a solid solution of these is arranged as an electron emission material in a region facing the discharge space. It is a plasma display panel.
- the compound it is preferable that a part of Ce is substituted with a trivalent metal or a tetravalent metal. Furthermore, it is desirable that the compound is dispersedly arranged in a particle state on a protective layer made of MgO.
- a plasma display capable of driving a good image display at a low voltage by using a predetermined compound having a high secondary electron emission coefficient that is chemically stabilized as compared with conventional MgO. Can provide a panel.
- MgO which has high ion bombardment resistance
- the compound is used as an electron emission material.
- a long-life plasma display panel can be provided.
- Both SrCeO 3 and BaCeO 3 are metal oxides having the same perovskite structure, can be solid-solved in the entire region, and exhibit intermediate characteristics depending on their composition ratios.
- the secondary electron emission efficiency is higher for BaCeO 3 than for SrCeO 3 , but the chemical stability is reversed.
- the required chemical stability varies depending on the process conditions under which the production is actually performed. Therefore, any one of a solid solution or an SrCeO 3 or BaCeO 3 compound in an appropriate ratio depending on the environment may be used.
- SrCeO 3 and BaCeO 3 or their mutual solid solution may partially replace the alkaline earth site with Ca or La within the range where the perovskite structure is maintained, or the Ce site may be trivalent such as In or Y. It may be partially substituted with rare earth metals, Sn, Zr, etc., or O may be partially substituted with F.
- Ce when Ce is replaced with Sn, which is the same tetravalent metal, the secondary electron emission efficiency is slightly reduced, but the chemical stability can be further increased.
- Ce when Ce is substituted with a trivalent rare earth metal such as In or Y which is a trivalent metal, the secondary electron emission efficiency can be further improved while improving the chemical stability. Therefore, the characteristics can be finely adjusted by these substitutions. Two or more kinds of such substitutions can be performed simultaneously. However, even in such a substitution composition, the main components need to be alkaline earth, Ce and O to the last.
- the total amount of Sr and Ba and the molar ratio of Ce, (Sr + Ba) / Ce is 0. .995 or less is desirable. This is because even if the ratio is 1.000, due to the non-uniformity of the composition, SrO and BaO remain in a very small amount in the reaction process between the alkaline earth oxide raw material and CeO 2 , and the atmosphere is not adjusted. Under the conditions, this is considered to be due to the fact that this becomes SrCO 3 or BaCO 3 to cover the surface and the secondary electron emission coefficient decreases.
- the total ratio of these substitution elements may be 0.995 or less. Also, lowering this ratio further, although CeO 2 is precipitated as surplus to some extent below, in this state, since the hindered generating composition with many alkaline earth described above, a mixture of CeO 2 It is good to be.
- Examples of a method for synthesizing one or more kinds of crystalline oxides selected from SrCeO 3 , BaCeO 3 , or solid solutions thereof include a solid phase method, a liquid phase method, and a gas phase method.
- the solid phase method is a method in which raw material powders (metal oxide, metal carbonate, etc.) containing each metal are mixed and heat-treated at a temperature of a certain level or more to react.
- a solution containing each metal is prepared, and a solid phase is precipitated from the solution.
- the solution is applied onto a substrate and then dried, and then subjected to heat treatment at a certain temperature or more to obtain a solid phase. Is the method.
- the vapor phase method is a method for obtaining a film-like solid phase by a method such as vapor deposition, sputtering, or CVD.
- any of the above-described methods can be used. If the compound is used in a powder form, a solid phase method is generally suitable because it is relatively low in production cost and can be easily produced in large quantities.
- part of the PDP the compound may be disposed at least in a region facing the discharge space.
- the present invention is not limited to this, and it may be formed in another part, for example, a position such as a phosphor part or a rib surface, or may be mixed with the phosphor.
- these compounds for example, when considered to be formed on a dielectric layer covering the electrodes of the front plate, as shown in FIGS. 1 and 2, it is usually formed as a protective layer on the dielectric layer.
- a film of these compounds is formed, these powders are dispersed, or a film of these compounds is formed on the MgO film as shown in FIGS. Or by spraying powders of these compounds.
- these compounds are stable compounds with a high melting point, but have slightly lower sputtering resistance and slightly lower transparency than MgO. Therefore, when these compounds are dispersed in a powder form on the dielectric layer instead of the protective layer, luminance deterioration due to a decrease in transparency may be a problem. Therefore, it is desirable to use a MgO film as the protective layer as in the past, and to disperse and spray the powder on such a level that the transmittance does not become a problem.
- the coverage is preferably 20% or less. Moreover, when there are too few compound powders, the effect by a powder will become low. For this reason, the coverage is preferably in the range of 1% to 20%.
- the particle size may be selected within the range of about 0.1 ⁇ m to 10 ⁇ m according to the cell size and the like. For example, when dispersedly arranged, the thickness is preferably 3 ⁇ m or less, more preferably 1 ⁇ m or less so that the powder does not move or drop on the MgO film. Note that if the particle size is too large, it may fall to the discharge space depending on the mass of the particle.
- the high melting point MgO film plays its role as in the conventional case, and the secondary electron emission is played by the compound of the present invention, and its coverage is low.
- crystalline MgO powder having good initial electron emission efficiency is dispersed and dispersed on a protective layer made of MgO. Things have been done.
- an organic component is mixed with the MgO powder to form a paste, printed on a protective layer made of MgO, and then heat-treated at an appropriate temperature to remove the organic component. The method is used.
- the crystalline oxide powder of the present invention can also be dispersed and dispersed by the same process.
- both the above-mentioned crystalline oxide and MgO powder may be dispersed on the surface of the protective layer.
- a paste containing both the crystalline oxide powder of the present invention and the crystalline MgO powder is prepared. After the paste is printed on the protective layer made of MgO, it is heat-treated at an appropriate temperature to remove the organic component, so that the crystalline oxide powder and the crystalline MgO powder are made of MgO in a single process. Since it can arrange
- the crystalline oxide powder of the present invention or the crystalline MgO powder may be disposed first with respect to the protective layer.
- the effect of spraying the MgO powder may be somewhat difficult to express.
- the crystalline oxide powder of the present invention may be covered with the MgO powder.
- the effect of the crystalline oxide powder is rarely diminished by the MgO powder.
- a compound is described as, for example, “BaCeO 3 ”.
- Ce is an element other than Ce 4+ , part of which tends to become Ce 3+ , in which case oxygen defects occur in the crystal. Therefore, more accurately, it should be described as “BaCeO 3- ⁇ ”, but this ⁇ varies depending on manufacturing conditions and the like and is not necessarily a constant value. Therefore, although it is described as “BaCeO 3 ” for convenience, this does not deny the existence of oxygen defects in the crystal of the compound. Similarly, other compounds include cases where oxygen defects exist in the crystal.
- FIG. 1 is an exploded perspective view of the PDP 100.
- FIG. 2 is a longitudinal sectional view of the PDP 100 (a sectional view taken along line II in FIG. 1).
- the PDP 100 has a front plate 1 and a back plate 8.
- a discharge space 14 is formed between the front plate 1 and the back plate 8.
- This PDP is an AC surface discharge type, and the protective layer 7 uses the above-described compound (one or more selected from SrCeO 3 and BaCeO 3 , or a crystalline oxide made of a solid solution of these) as an electron emission material. Except for being formed by use, it has the same configuration as the PDP according to the conventional example.
- the front plate 1 includes a front glass substrate 2, a plurality of display electrodes 5 formed on an inner surface thereof (a surface facing the discharge space 14), a dielectric layer 6 formed so as to cover the display electrodes 5, and a dielectric And a protective layer 7 formed on the body layer 6.
- Each display electrode 5 is formed by laminating a bus electrode 4 made of Ag or the like for ensuring good conductivity on a transparent conductive film 3 made of ITO or tin oxide, and adjacent display electrodes (scanning electrodes and sustain electrodes).
- the electrode is a pair, and a sustain discharge is performed between the pair of display electrodes 5 and 5.
- the protective layer 7 is composed of the above-described compound (the crystalline oxide of the present invention).
- the protective layer 7 may be composed of only the above compound or may be used so as to be mixed with MgO.
- the back plate 8 is provided on the back glass substrate 9, a plurality of address (data) electrodes 10 formed on one side thereof, a dielectric layer 11 formed so as to cover the address electrodes 10, and an upper surface of the dielectric layer 11.
- the partition walls (ribs) 12 are formed, and a phosphor layer formed between the partition walls 12.
- the phosphor layer is formed so that the red phosphor layer 13 (R), the green phosphor layer 13 (G), and the blue phosphor layer 13 (B) are arranged in this order.
- BaMgAl 10 O 17 : Eu is used as a blue phosphor
- Zn 2 SiO 4 : Mn is used as a green phosphor
- Y 2 O 3 : Eu is used as a red phosphor. it can.
- the front plate 1 and the back plate 8 are arranged so that the longitudinal directions of the display electrodes 5 and the address electrodes 10 are orthogonal to each other and face each other, and are joined using a sealing member (not shown).
- the discharge cells are arranged in accordance with the regions where the pair of display electrodes 5 and 5 and one address electrode 10 are orthogonal to each other.
- the discharge space 14 is filled with a discharge gas composed of a rare gas component such as He, Xe, or Ne.
- the scan electrode and sustain electrode of the display electrode 5 and the address electrode 10 are each connected to an external drive circuit (not shown). At the time of driving, a voltage is applied from each driving circuit to each electrode 5, 10 at a predetermined timing, thereby performing addressing between a predetermined scanning electrode and address electrode 10 in the discharge space 14, and a pair of display electrodes 5, 5 Sustain discharge is generated between.
- the phosphor layer 13 is excited by ultraviolet rays having a short wavelength (wavelength 147 nm) generated along with the sustain discharge, and the generated visible light passes through the front plate 1 and is used for image display.
- the protective layer 7 is made of the above compound, so that it is chemically stable as compared with the conventional one and exhibits excellent secondary electron emission characteristics. Therefore, good sustain discharge can be performed in the discharge space 14 over a long period of time, and good image display performance can be exhibited with low power drive.
- this PDP 100 can be manufactured without controlling the atmosphere of the entire manufacturing process, it has a merit that it can be realized at a relatively low cost.
- FIGS. 3 is an exploded perspective view of the PDP 200.
- FIG. 4 is a longitudinal sectional view of the PDP 200 (a sectional view taken along line II in FIG. 3).
- the PDP 200 has the same structure as the PDP 100 except that the protective layer 7 is made of MgO and the above-described compound powder 20 is arranged on the protective layer 7 in the form of particles. Also in the PDP 200, the compound powder 20 faces the discharge space 14 and is disposed so as to face the discharge space 14.
- the effect of exhibiting excellent image display performance and low power driving can be exhibited as in the case of the PDP 100.
- the layer 7 made of MgO various characteristics of the layer 7 (protective effect of the dielectric layer 6 due to good ion impact resistance and long life, etc.) are exhibited together. Has a merit.
- the front plate prepares the front plate.
- a plurality of line-shaped transparent electrodes 3 are formed on one main surface of the flat front glass substrate 2.
- the silver paste is baked by heating the entire substrate to form the bus electrode 4 to obtain the display electrode 5.
- the glass paste containing the dielectric layer glass is applied to the main surface of the front glass substrate 2 by a blade coater method so as to cover the display electrode 5. Thereafter, the entire substrate is held at 90 ° C. for 30 minutes to dry the glass paste, and then baked at a temperature of about 580 ° C. for 10 minutes. Thereby, the dielectric layer 6 is obtained.
- the above-described compound is formed as a thick film instead of the protective layer made of MgO.
- the compound powder is mixed with a vehicle, a solvent, or the like to form a paste having a relatively high compound powder content, and this is spread thinly on the surface of the dielectric layer 6 by a method such as a printing method. Thereafter, it is fired to form a thick film.
- the protective layer 7 made of MgO is formed on the dielectric layer 6 and the compound powder is sprayed on the surface thereof.
- magnesium oxide (MgO) is formed on the dielectric layer by an electron beam evaporation method, and the protective layer 7 is formed.
- the compound powder 20 is disposed on the surface of the protective layer 7 made of MgO.
- the compound powder is prepared by a method of preparing a paste having a relatively low compound powder content and applying it by a printing method, a method of dispersing and dispersing the powder in a solvent, a method of using a spin coater, etc.
- An example of the method is that after disposing on the protective layer 7, firing at a temperature of around 500 degrees.
- the compound powder 20 of the present invention is mixed with a vehicle such as ethyl cellulose to prepare a paste. This is applied onto the protective layer 7 made of MgO by a printing method or the like. After applying the paste, it is dried and baked at a temperature of around 500 ° C. Thereby, the spreading layer which consists of the predetermined compound powder 20 is formed.
- the front plate is manufactured.
- the back plate is manufactured in a separate process from the above front plate. After applying a plurality of silver pastes in a line on one main surface of a flat back glass substrate, the entire back glass substrate is heated and the silver paste is baked to form address electrodes.
- a partition wall is formed by applying a glass paste between adjacent address electrodes and firing the glass paste by heating the entire back glass substrate.
- phosphor inks of R, G, and B colors By applying phosphor inks of R, G, and B colors between adjacent barrier ribs, and heating the back glass substrate to about 500 ° C. and baking the phosphor ink, a resin component in the phosphor ink (Binder) and the like are removed to form a phosphor layer.
- the front plate and the back plate thus obtained are bonded using sealing glass.
- the temperature at this time is around 500 ° C.
- the sealed interior is evacuated to high vacuum, and then a predetermined discharge gas made of a rare gas is sealed.
- Sample No. 0 MgO powder, sample no.
- the same weight increase rate was measured for the sample reacted with SrCO 3 using SiO 2 which is an oxide of the same tetravalent metal as 7 instead of CeO 2 .
- sample No. which was not reacted with CeO 2 was obtained.
- sample no. No. 1 was observed to produce CaO.
- sample no. 2 is part Sr (OH) 2 is mixed in SrO
- sample No. 3 was a mixture of Ba (OH) 2 and BaCO 3 with no BaO itself observed. This is because it becomes chemically unstable as CaO becomes SrO and SrO becomes BaO, so that it reacts with moisture and carbon dioxide in the air during cooling after firing to become hydroxide and carbonate. Conceivable.
- Sample No. 5 and 6 are sample Nos.
- the weight increase rate was smaller than that of 1 to 4, and the weight increase was slight even under the conditions of 65 ° C. and 80% for 12 hours. Further, in the X-ray diffraction after treatment, only diffraction peaks of SrCeO 3 and BaCeO 3 were observed, respectively. A stability comparable to 0 MgO was confirmed.
- XPS X-ray Photoelectron Spectroscopy measurement
- the secondary electron emission coefficient is generally said to increase as the sum of the band gap width and electron affinity decreases. As the energy position of the valence band edge is on the lower energy side, the bandgap width becomes smaller, so the secondary electron emission coefficient becomes larger.
- the amount of carbon derived from carbonate on the surface of the sample is an index of chemical stability that is more sensitive than the hygroscopic measurement in Table 1 for compounds containing alkaline earth metals. If the sample is chemically unstable, it reacts with carbon dioxide in the air and the amount of surface carbon increases. When the surface carbon amount is more than a certain level, the particle surface is completely covered with an alkaline earth carbonate having a low secondary electron emission coefficient such as BaCO 3 . Even if the energy position of the valence band edge is on the low energy side, a high secondary electron emission coefficient cannot be obtained.
- XPS X-ray Photoelectron Spectroscopy measurement
- FIG. 6 XPS spectra of the C1s orbit of the sample are shown in FIG. 6 at the valence band edges of 0, 2, 5, and 7, that is, MgO, SrO, SrCeO 3 , and SrSiO 3 .
- background noise is subtracted. From FIG. 5, it can be seen that the valence band edge position of SrO is almost the same as that of MgO, SrSiO 3 is slightly higher in energy, and SrCeO 3 is significantly lower in energy.
- the C peak attributed to the carbonic acid compound appears in the vicinity of 288 to 290 eV, but the SrO peak is much higher than MgO.
- Each peak of SrSiO 3 and SrCeO 3 is also higher than the peak of MgO, but much lower than the peak of SrO.
- SrCeO 3 is stabilized because the amount of surface C is much smaller than that of SrO, and the valence band edge position is on the lower energy side than MgO, so that the secondary electron emission efficiency is increased. There is expected.
- Table 2 shows the results of XPS measurement for various compounds shown in Table 1 (Sample Nos. 0 to 7).
- Table 2 in order to semi-quantitatively show the valence band edge position and the C content, XPS Intensity at 3 eV and 2 eV (the larger the better, the lower the energy shift, the better the secondary electron emission characteristics), and the vicinity of 288 to 290 eV Intensity of the C1s peak originating from the carbonic acid compound (shown in Fig. 1) is shown (the smaller the chemical stability). All the values shown in Table 2 are obtained by subtracting the background value.
- the compounds of the present invention (samples Nos. 5 and 6) have 3 eV and 2 eV XPS Intensities of No. It was confirmed that it was larger than the alkaline earth alone having 1 to 3 and the amount of C was small. However, sample no. Samples Nos. 5 and 6 are sample No. It was found that the amount of C was larger than that of 0 MgO.
- Sample No. Nos. 11 to 13 are obtained by replacing Ce with In.
- Sample No. 14 is Y for Ce. 15 and sample no. 16 is obtained by partially substituting Ce with Sn.
- substitution of Ce with a trivalent or tetravalent metal ion was found to have an effect of improving the 2eV intensity and the C content. Although no example is given here, the same effect was also observed in the substitution of Ce in SrCeO 3 . From this experiment, it is considered that any of the rare earth metals containing In or Y is suitable as the trivalent metal replacing Ce.
- a front glass substrate made of flat soda lime glass having a thickness of about 2.8 mm was prepared.
- an ITO (transparent electrode) material was applied in a predetermined pattern and dried.
- a plurality of silver pastes, which are a mixture of silver powder and an organic vehicle, were applied in a line. Then, the said glass paste was baked by heating the said front glass substrate, and the display electrode was formed.
- the glass paste was applied to the front panel on which the display electrode was produced using a blade coater method. Thereafter, the glass paste was dried by holding at 90 ° C. for 30 minutes, and baked at a temperature of 585 ° C. for 10 minutes to form a dielectric layer having a thickness of about 30 ⁇ m.
- the protective layer was formed by firing at 500 ° C.
- a back plate was produced by the following method. First, an address electrode mainly composed of silver was formed in a stripe shape on a rear glass substrate made of soda lime glass by screen printing, and then a dielectric layer having a thickness of about 8 ⁇ m was formed in the same manner as the front plate. .
- partition walls were formed on the dielectric layer using glass paste between adjacent address electrodes.
- the partition was formed by repeating screen printing and baking.
- the phosphor layer of red (R), green (G), and blue (B) is applied to the surface of the dielectric layer exposed between the wall surfaces of the barrier ribs and the barrier ribs, and then dried and fired to phosphor layer Was made.
- PDP PDP sample Nos. 0, 5 to 7, and 11 to 16
- Aging was performed by connecting each PDP produced to a drive circuit.
- the sustaining voltage was measured when the aging time reached 50 hours and 200 hours, respectively.
- the aging treatment is performed in order to clean the surface of the MgO film or the sprayed powder to some extent by sputtering.
- an aging process is normally performed, and a panel that does not perform the aging process has a high driving voltage regardless of whether or not powder is dispersed.
- Table 4 shows the results of this aging process on the drive voltage.
- sample No. 1 of the example in which Ce of BaCeO 3 was replaced by In, Y, and Sn. 11 to 16 it can be seen that the voltage rise when the aging process is performed for 50 hours is suppressed to a relatively low level, and the aging can be performed in a relatively short time. If aging is required for a long time, the productivity may decrease and the cost may increase. In this way, by replacing Ce of BaCeO 3 with In, Y, and Sn, The improvement effect was also confirmed.
- each PDP For each PDP, the coverage of the MgO layer with powder was measured. As in Experiment 3, each PDP was subjected to an aging treatment, and each discharge voltage was measured when the aging time reached 50 hours and 200 hours later. The measurement results are shown in Table 5.
- Sample No. with a coverage of 1.1%. No. 21 is low in voltage even after aging for a short time, but its decrease is small. Since this is a small amount of powder, it is considered that the low voltage effect is suppressed to a small extent according to the amount of powder.
- the effect of lowering the voltage becomes too low when the coverage is less than 1.0%.
- the coverage exceeds 20%, the aging time becomes too long.
- the coverage of the powder with respect to the protective layer is considered to be desirably in the range of 1.0% to 20%.
- the present invention can be widely used in public facilities, home televisions, and the like, and in this case, a plasma display panel with improved discharge characteristics can be provided.
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Abstract
Description
本願発明者等は、二次電子放出効率は高いが化学的に不安定なCaO、SrO、BaOの原料と各種の金属、B、Al、Si、P、Ga、Ge、Ti、Zr、Ce、V、Nb、Ta、Mo、W等の酸化物を反応させて、非常に多種にわたる化合物を合成した。そして、その化学的安定性と二次電子放出能を詳細に検討した結果、CeO2を反応させた、SrCeO3、BaCeO3、あるいはこれら相互の固溶体よりなる結晶性酸化物とすることにより、二次電子放出効率をあまり低下させずに化学的な安定性を高めることができた。そして、これらの化合物を用いれば、MgOを用いた場合よりも駆動電圧が低下したPDPが得られることを見出した。
次に、本発明のPDPの具体例を図を用いて説明する。
ように配列するように形成される。
次に、本発明によるPDPの他の一例(実施の形態2)を、図3および4に示す。図3は、当該PDP200の分解斜視図である。図4は、当該PDP200の縦断面図(図3、I-I線断面図)である。
次に、本発明の化合物粉末を散布したPDPの作製方法について、一例を挙げて説明する。なお、以下のPDPの製造方法は例示に過ぎず、同一の発明の範囲内において適宜変更が可能である。
成分(バインダー)等を除去して蛍光体層を形成する。
以下、本発明の化合物及びこれを用いたPDPについて行った性能評価実験について、さらに詳細に説明する。
固相粉末法に基づき、SrO、BaOの原料粉末にCeO2粉末を反応させて合成した結晶性化合物について、化学的安定性の改善効果を評価した。
PDPの放電空間に臨むように化合物粉末を配設する場合、配設した化合物粉末を安定に保つとともに、保護層の二次電子放出係数を低下させないことが重要である。しかしながら、PDPにおける二次電子放出係数を当該化合物粉末に対して直接測定することは容易ではない。その間接的な証拠としては、PDPの放電電圧が低下するのを確認すれば良いが、全ての材料に対してPDPを作製するのも容易ではない。
[PDPの作製]
厚さ約2.8mmの平坦なソーダライムガラスからなる前面ガラス基板を用意した。この前面ガラス基板の面上に、ITO(透明電極)の材料を所定のパターンで塗布し、乾燥した。次いで、銀粉末と有機ビヒクルとの混合物である銀ペーストをライン状に複数本塗布した。その後、上記前面ガラス基板を加熱することにより、上記銀ペーストを焼成して表示電極を形成した。
2 前面ガラス基板
3 透明導電膜
4 バス電極
5 表示電極
6 誘電体層
7 保護層
8 背面板
9 背面ガラス基板
10 アドレス電極
11 誘電体層
12 隔壁
13 蛍光体層
14 放電空間
20 化合物
100、200 プラズマディスプレイパネル(PDP)
Claims (10)
- 複数の電極と蛍光体を備え、前記複数の電極のいずれかの間に電圧を印加して放電空間内で放電させ、当該放電を前記蛍光体で可視光に変換して発光するプラズマディスプレイパネルであって、
前記放電空間に臨む領域に、SrCeO3、BaCeO3から選択される一種類以上、あるいはこれら相互の固溶体よりなる結晶性酸化物を配した
プラズマディスプレイパネル。 - 前記結晶性酸化物に含まれるCeの一部が、3価金属または4価金属によって置換されている
請求項1に記載のプラズマディスプレイパネル。 - 前記3価金属がInまたは希土類金属である
請求項2に記載のプラズマディスプレイパネル。 - 前記4価金属がSnである
請求項2に記載のプラズマディスプレイパネル。 - 複数の第一電極が形成された第一基板の表面に、前記第一電極を覆うように第一誘電体層が形成され、前記第一誘電体層上に保護層が形成された第一パネルと、複数の第二電極が形成された第二基板の表面に、前記第二電極を覆うように第二誘電体層が形成され、第二誘電体層の上に蛍光体層が形成されてなる第二パネルを有し、
前記保護層が請求項1記載の結晶性酸化物を用いて構成され、
第一パネルと第二パネルとが放電空間を挟んで対向配置されたプラズマディスプレイパネル。 - 前記保護層上には、さらにMgOからなる材料が、粉末粒子の状態で前記材料とともに分散配置されている
請求項5に記載のプラズマディスプレイパネル。 - 複数の第一電極が形成された第一基板の表面に、前記第一電極を覆うように第一誘電体層が形成され、前記第一誘電体層上保護層が形成された第一パネルと、複数の第二電極が形成された第二基板の表面に、前記第二電極を覆うように第二誘電体層が形成され、第二誘電体層の上に蛍光体層が形成されてなる第二パネルを有し、
保護層の表面に、請求項1記載の結晶性酸化物が粉末粒子の状態で分散配置され、
第一パネルと第二パネルとが放電空間を挟んで対向配置されたプラズマディスプレイパネル。 - 保護層に対する前記結晶性酸化物の被覆率が1%以上20%以下である
請求項7に記載のプラズマディスプレイパネル。 - 保護層の表面に、前記結晶性酸化物の粉末粒子とともに、MgOからなる材料が粉末粒子の状態で分散配置されている
請求項7に記載のプラズマディスプレイパネル。 - 前記結晶性酸化物の上に、MgOからなる材料が、粉末粒子の状態で分散配置されている
請求項7に記載のプラズマディスプレイパネル。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/990,197 US20110175554A1 (en) | 2009-06-10 | 2010-03-29 | Plasma display panel |
CN201080001697.4A CN102047374A (zh) | 2009-06-10 | 2010-03-29 | 等离子体显示面板 |
JP2010544517A JPWO2010143345A1 (ja) | 2009-06-10 | 2010-03-29 | プラズマディスプレイパネル |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2009-139097 | 2009-06-10 | ||
JP2009139097 | 2009-06-10 |
Publications (1)
Publication Number | Publication Date |
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WO2010143345A1 true WO2010143345A1 (ja) | 2010-12-16 |
Family
ID=43308608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/002238 WO2010143345A1 (ja) | 2009-06-10 | 2010-03-29 | プラズマディスプレイパネル |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110175554A1 (ja) |
JP (1) | JPWO2010143345A1 (ja) |
KR (1) | KR20120036243A (ja) |
CN (1) | CN102047374A (ja) |
WO (1) | WO2010143345A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011138870A1 (ja) * | 2010-05-07 | 2011-11-10 | パナソニック株式会社 | プラズマディスプレイパネル |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0574352A (ja) * | 1991-09-10 | 1993-03-26 | Matsushita Electric Ind Co Ltd | ガス放電型表示パネル |
JP2003016949A (ja) * | 2001-04-27 | 2003-01-17 | Matsushita Electric Ind Co Ltd | プラズマディスプレイパネル及びその製造方法 |
JP2004273158A (ja) * | 2003-03-05 | 2004-09-30 | Noritake Co Ltd | 放電表示装置の保護膜材料 |
JP2006107865A (ja) * | 2004-10-04 | 2006-04-20 | Matsushita Electric Ind Co Ltd | プラズマディスプレイパネル |
WO2009081589A1 (ja) * | 2007-12-26 | 2009-07-02 | Panasonic Corporation | プラズマディスプレイパネル |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5263663A (en) * | 1975-11-19 | 1977-05-26 | Fujitsu Ltd | Gas electric discharge panel |
-
2010
- 2010-03-29 WO PCT/JP2010/002238 patent/WO2010143345A1/ja active Application Filing
- 2010-03-29 KR KR1020107024793A patent/KR20120036243A/ko unknown
- 2010-03-29 JP JP2010544517A patent/JPWO2010143345A1/ja not_active Withdrawn
- 2010-03-29 CN CN201080001697.4A patent/CN102047374A/zh active Pending
- 2010-03-29 US US12/990,197 patent/US20110175554A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0574352A (ja) * | 1991-09-10 | 1993-03-26 | Matsushita Electric Ind Co Ltd | ガス放電型表示パネル |
JP2003016949A (ja) * | 2001-04-27 | 2003-01-17 | Matsushita Electric Ind Co Ltd | プラズマディスプレイパネル及びその製造方法 |
JP2004273158A (ja) * | 2003-03-05 | 2004-09-30 | Noritake Co Ltd | 放電表示装置の保護膜材料 |
JP2006107865A (ja) * | 2004-10-04 | 2006-04-20 | Matsushita Electric Ind Co Ltd | プラズマディスプレイパネル |
WO2009081589A1 (ja) * | 2007-12-26 | 2009-07-02 | Panasonic Corporation | プラズマディスプレイパネル |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011138870A1 (ja) * | 2010-05-07 | 2011-11-10 | パナソニック株式会社 | プラズマディスプレイパネル |
Also Published As
Publication number | Publication date |
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CN102047374A (zh) | 2011-05-04 |
JPWO2010143345A1 (ja) | 2012-11-22 |
KR20120036243A (ko) | 2012-04-17 |
US20110175554A1 (en) | 2011-07-21 |
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