WO2010103836A1 - 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
- Publication number
- WO2010103836A1 WO2010103836A1 PCT/JP2010/001733 JP2010001733W WO2010103836A1 WO 2010103836 A1 WO2010103836 A1 WO 2010103836A1 JP 2010001733 W JP2010001733 W JP 2010001733W WO 2010103836 A1 WO2010103836 A1 WO 2010103836A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- display panel
- plasma display
- mol
- dielectric layer
- less
- Prior art date
Links
Images
Classifications
-
- 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
- H01J11/38—Dielectric or insulating layers
-
- 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
-
- 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
- H01J11/22—Electrodes, e.g. special shape, material or configuration
- H01J11/24—Sustain electrodes or scan electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2211/00—Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
- H01J2211/20—Constructional details
- H01J2211/22—Electrodes
- H01J2211/24—Sustain electrodes or scan electrodes
- H01J2211/245—Shape, e.g. cross section or pattern
Definitions
- the present invention relates to a plasma display panel used for a display device or the like.
- Plasma display panels (hereinafter referred to as PDPs) are used in 100-inch class televisions and the like because they can achieve high definition and large screens.
- PDP has been increasingly applied to high-definition televisions having twice or more scanning lines as compared with the conventional NTSC system.
- PDPs containing no lead component have been commercialized.
- the PDP is basically composed of a front plate and a back plate.
- the front plate has a glass substrate of sodium borosilicate glass by a float process.
- a display electrode composed of a striped transparent electrode and a bus electrode is formed on one main surface of the glass substrate.
- a dielectric layer that functions as a capacitor is formed to cover the display electrodes.
- a protective layer made of magnesium oxide (MgO) is formed on the dielectric layer.
- the back plate has a glass substrate. Striped address electrodes are formed on one main surface of the glass substrate.
- a base dielectric layer is formed to cover the address electrodes.
- a partition wall is formed on the underlying dielectric layer.
- a phosphor layer that emits red, green, and blue light is formed between the barrier ribs.
- the front plate and the back plate are hermetically sealed with their electrode forming surfaces facing each other.
- Ne—Xe discharge gas is sealed at a pressure of 55 kPa to 80 kPa in the discharge space partitioned by the partition walls.
- PDP discharges by selectively applying a video signal voltage to the display electrodes, and the ultraviolet rays generated by the discharge excite each color phosphor layer to emit red, green, and blue light, thereby realizing color image display is doing.
- a silver electrode for ensuring conductivity is used for the bus electrode of the display electrode, and a low melting glass mainly composed of lead oxide is used for the dielectric layer.
- dielectric layers that do not contain a lead component have been disclosed in consideration of recent environmental problems (see, for example, Patent Documents 1, 2, 3, and 4).
- the front plate has so-called transparent electrodes that transmit visible light in order to ensure an aperture ratio.
- transparent electrodes that transmit visible light in order to ensure an aperture ratio.
- it has been studied to secure conductivity with a display electrode made of only a metal electrode without forming a transparent electrode.
- the residual stress in the glass substrate When there are a plurality of metal electrodes, the residual stress in the glass substrate further increases in the compression direction in proportion to the metal electrode area. If the residual stress in the glass substrate after forming the dielectric layer is in the compression direction, the residual stress in the dielectric layer on the film surface side is in the tensile direction. In this case, when the front plate and the back plate are disposed to be opposed to each other and sealed, the front plate collides with the back plate to generate micro cracks on the front plate, which promotes substrate cracking. Furthermore, a voltage load is applied to the minute cracks generated in the dielectric layer during image display, and an insulation failure occurs in the corresponding portion. In addition, this phenomenon becomes remarkable in a dielectric layer that does not contain a lead component.
- the present invention solves the above-described problems, and provides a PDP that ensures high brightness and high reliability even in high-definition display, and further considers environmental issues.
- JP 2003-128430 A JP 2002-053342 A JP 2001-045877 A JP-A-9-050769
- the PDP of the present invention includes a front plate and a back plate, and the front plate and the back plate are arranged to face each other and seal the periphery to form a discharge space.
- the front plate has a display electrode, a dielectric layer, and a protective layer on the front substrate.
- the back plate has electrodes, barrier ribs, and phosphor layers on the back substrate.
- the vertical axis represents the area ratio of the display electrode to the area of the image display area of the front plate, and the horizontal axis represents the difference between the expansion coefficient of the front substrate from room temperature to 300 ° C. and the expansion coefficient of the dielectric layer from room temperature to 300 ° C.
- the coefficient difference and the area ratio are the coordinates (35 ⁇ 10 ⁇ 7 / ° C., 60%), the coordinates (8 ⁇ 10 ⁇ 7 / ° C., 60%), and the coordinates (5 ⁇ 10 ⁇ 7 / ° C., 40%). %) And coordinates (23 ⁇ 10 ⁇ 7 / ° C., 40%) in the region including the straight line.
- the present invention provides a PDP that secures high brightness and high reliability even in high-definition display, and further considers environmental issues.
- FIG. 1 is a perspective view showing the structure of the PDP in the embodiment.
- FIG. 2 is a schematic cross-sectional view showing the configuration of the front plate and the residual stress in the embodiment.
- FIG. 3 is a diagram showing the relationship between the expansion coefficient of the dielectric and the residual stress of the substrate.
- FIG. 4 is a diagram showing the relationship between the expansion coefficient of the dielectric and the area ratio of the electrodes.
- the PDP 1 of the present embodiment is an AC surface discharge type PDP.
- a front plate 2 made of a front glass substrate 3 and the like and a back plate 10 made of a back glass substrate 11 and the like are arranged to face each other.
- the outer peripheral portions of the front plate 2 and the back plate 10 are hermetically sealed with a sealing material made of glass frit or the like.
- a discharge gas such as Ne and Xe is sealed at a pressure of 55 kPa to 80 kPa in the discharge space 16 inside the sealed PDP 1.
- a pair of strip-shaped display electrodes 6 composed of scanning electrodes 4 and sustaining electrodes 5 and black stripes (light shielding layers) 7 are arranged in a plurality of rows in parallel with each other.
- a dielectric layer 8 that functions as a capacitor is formed on the front glass substrate 3 so as to cover the display electrode 6 and the light shielding layer 7. Further, a protective layer 9 made of magnesium oxide (MgO) or the like is formed on the surface of the dielectric layer 8.
- MgO magnesium oxide
- a plurality of strip-like address electrodes 12 are arranged in parallel to each other in a direction orthogonal to the display electrodes 6 of the front plate 2. Further, a base dielectric layer 13 is formed so as to cover the address electrodes 12. Further, on the underlying dielectric layer 13 formed between the address electrodes 12, barrier ribs 14 having a predetermined height that divide the discharge space 16 are formed. Between the barrier ribs 14, a phosphor layer 15 that emits red light by ultraviolet rays, a phosphor layer 15 that emits blue light, and a phosphor layer 15 that emits green light are sequentially formed.
- a discharge cell is formed at a position where the display electrode 6 and the address electrode 12 intersect.
- a discharge cell having a phosphor layer 15 that emits red light, a discharge cell that has a phosphor layer 15 that emits blue light, and a discharge cell that has a phosphor layer 15 that emits green light form a pixel for color display.
- Scan electrode 4 and sustain electrode 5 have white electrodes 4b and 5b containing silver (Ag) for ensuring conductivity.
- Scan electrode 4 and sustain electrode 5 have black electrodes 4a and 5a containing a black pigment in order to improve the contrast of the image display surface.
- the white electrode 4b is laminated on the black electrode 4a.
- the white electrode 5b is laminated on the black electrode 5a.
- a black paste layer (not shown) is formed by applying a black paste containing a black pigment to the front glass substrate 3 by a screen printing method or the like.
- a black paste layer (not shown) is patterned by photolithography.
- a white paste containing silver (Ag) is applied onto a black paste layer (not shown) by screen printing or the like, thereby forming a white paste layer (not shown).
- a white paste layer (not shown) and a black paste layer (not shown) are patterned by photolithography.
- a black paste layer (not shown) and a white paste layer (not shown) are baked through a development step, whereby the white electrodes 4b and 5b, the black electrodes 4a and 5a, which are display electrodes 6, and the light shielding. Layer 7 is formed.
- a dielectric paste layer (not shown) is formed by applying a dielectric paste on front glass substrate 3 by a die coating method or the like so as to cover scan electrode 4, sustain electrode 5, and light shielding layer 7. The Thereafter, when a predetermined time elapses, the surface of the dielectric paste layer (not shown) is leveled and becomes flat. Thereafter, the dielectric paste layer is baked to form the dielectric layer 8 that covers the scan electrode 4, the sustain electrode 5, and the light shielding layer 7.
- the dielectric paste is a paint containing dielectric glass such as glass powder, a binder, and a solvent.
- a protective layer 9 made of magnesium oxide (MgO) or the like is formed on the dielectric layer 8 by a vacuum deposition method.
- the scanning electrode 4, the sustaining electrode 5, the light shielding layer 7, the dielectric layer 8, and the protective layer 9 are formed on the front glass substrate 3, and the front plate 2 is completed.
- the back plate 10 is formed as follows.
- address electrodes 12 are formed on the rear glass substrate 11. Specifically, an address electrode paste layer (not shown) is formed by applying a paste containing silver (Ag) onto the rear glass substrate 11 by screen printing. Next, an address electrode paste layer (not shown) is patterned by a photolithography method to form a material layer (not shown) to be a component for the address electrode 12. Thereafter, the address layer 12 is formed by firing a material layer (not shown) at a predetermined temperature.
- a method of forming a metal film on the rear glass substrate 11 by a sputtering method, a vapor deposition method or the like is employed.
- a base dielectric paste layer (not shown) is formed by applying a base dielectric paste on the back glass substrate 11 on which the address electrodes 12 have been formed so as to cover the address electrodes 12 by a die coating method or the like. Is done. Thereafter, the base dielectric paste layer (not shown) is fired to form the base dielectric layer 13.
- the base dielectric paste is a paint containing a base dielectric material such as glass powder, a binder, and a solvent.
- a partition wall paste (not shown) is formed by applying a partition wall forming paste including a partition wall material on the base dielectric layer 13.
- a partition wall paste layer (not shown) is patterned by photolithography to form a structure (not shown) that becomes a material layer of the partition wall 14.
- the partition 14 is formed by baking a structure (not shown).
- a sandblast method or the like is adopted in addition to the photolithography method.
- a phosphor paste containing a phosphor material is applied on the underlying dielectric layer 13 between the adjacent barrier ribs 14 and on the side surfaces of the barrier ribs 14.
- the phosphor layer 15 is formed by firing the phosphor paste.
- the back plate 10 having predetermined constituent members on the back glass substrate 11 is completed.
- Dielectric Layer 8 In order to suppress the occurrence of microcracks in the dielectric layer 8 and to ensure insulation reliability, it is preferable that a residual stress in the compression direction exists after the dielectric layer 8 is fired. For this reason, the front glass substrate 3 is required to have a residual stress in the tensile direction.
- a polarization strain meter manufactured by Shinko Seiki Co., Ltd .: Polarimeter SFII
- the polarization distortion meter measures the state of the distortion and the magnitude of the distortion by measuring the phase difference between the two lights generated when the light passes through the object with distortion by using the polarization of the light. Further, if the front glass substrate 3 has residual stress, the front glass substrate 3 is distorted. Therefore, the residual stress of the front glass substrate 3 can be measured by using a polarization strain meter.
- FIG. 2 schematically shows the residual stress existing in the components of the front plate 2 in the present embodiment.
- the light shielding layer 7 is omitted.
- a method for measuring the residual stress will be specifically described below.
- the front plate 2 is divided into a predetermined size.
- one end of the front plate 2 orthogonal to the extending direction of the display electrode 6 is placed on the stage of the polarization strain meter.
- white light is applied to the end face of the front plate 2 from a light source disposed at the lower part of the stage.
- the light that has passed through the front plate 2 is detected by the detection unit.
- the residual stress of the front glass substrate 3 directly under the display electrode 6 and the portion where the display electrode 6 does not exist that is, the residual stress of the front glass substrate 3 directly under the dielectric layer 8 are individually measured.
- the residual stress of the front glass substrate 3 immediately below the display electrode 6 and the residual stress of the front glass substrate 3 immediately below the dielectric layer 8 are added together, and the residual stress of the entire front glass substrate 3 is calculated.
- the measurement result of the residual stress is expressed as a value (+) if a compressive stress is present on the front glass substrate 3, and as a value (-) if a tensile stress is present on the front glass substrate 3. . If the residual stress of the front plate 2 is (+), a tensile stress is generated in the dielectric layer 8 conversely, so that micro cracks are likely to occur in the dielectric layer 8. Therefore, the strength and insulation reliability of the dielectric layer 8 are lowered. Therefore, the residual stress of the front glass substrate 3 in the front plate 2 is preferably ( ⁇ ).
- the residual stress of the front glass substrate 3 is preferably 0.0 MPa or less. In this case, there is no residual stress in the dielectric layer 8. Further, the residual stress of the front glass substrate 3 is preferably ⁇ 0.5 MPa or less. In this case, since the dielectric layer 8 has a residual stress in the compression direction, generation of microcracks can be further suppressed.
- the residual stress of the front glass substrate 3 becomes smaller than ⁇ 2.0 MPa, the warpage of the front plate 2 increases.
- a so-called multi-sided construction method has been introduced in which a structure is formed on a large glass substrate in advance so as to be a plurality of front plates 2 or back plates 10 and then cleaved for high efficiency. Therefore, the glass substrate size used in the manufacturing process of the front plate 2 or the back plate 10 is increased. In such a large substrate, the warp of the glass substrate becomes more remarkable, which is a big problem in the manufacturing process. Therefore, the residual stress of the front glass substrate 3 is more preferably ⁇ 1.5 MPa or more.
- the residual stress of the front glass substrate 3 is preferably ⁇ 2.0 MPa or more and 0.0 MPa or less. Furthermore, the residual stress of the front glass substrate 3 is more preferably ⁇ 1.5 MPa or more and ⁇ 0.5 MPa or less.
- a suitable residual stress of the front glass substrate 3 is realized by controlling the expansion coefficient of the dielectric layer 8. More specifically, by controlling the difference between the expansion coefficient of the glass substrate used for the front glass substrate 3 and the expansion coefficient of the dielectric layer 8, a suitable residual stress of the front glass substrate 3 is realized.
- a glass plate having an expansion coefficient of 83 ⁇ 10 ⁇ 7 / ° C. from room temperature to 300 ° C. is used for the front glass substrate 3.
- the expansion coefficient is a value from room temperature to 300 ° C.
- the suitable expansion coefficient of the dielectric layer 8 depends on the ratio of the area of the display electrode 6 formed on the front glass substrate 3 to the image display region. .
- a preferable range is defined by the relationship between the expansion coefficient of the dielectric layer 8 and the residual stress of the front glass substrate 3.
- the ratio of the area where the display electrode 6 occupies the image display area (hereinafter referred to as area ratio) was 40%, 50%, and 60%.
- the area ratio is less than 40%, the conductivity of the display electrode 6 is insufficient. Therefore, the discharge characteristics of the PDP 1 are deteriorated.
- the area ratio exceeds 60%, the aperture ratio of the front plate 2 is insufficient. Therefore, the brightness of the PDP 1 is lowered. Therefore, the area ratio is preferably 40% or more and 60% or less.
- the expansion coefficient is 78 ⁇ 10 ⁇ 7 / ° C. or less.
- the expansion coefficient is 77 ⁇ 10 ⁇ 7 / ° C. or less.
- the expansion coefficient is 75 ⁇ 10 ⁇ 7 / ° C. or less.
- the difference in expansion coefficient between the front glass substrate 3 and the dielectric layer 8 is 5 ⁇ 10 ⁇ 7 / ° C. or less at an area ratio of 40%. At an area ratio of 50%, the difference in expansion coefficient is 6 ⁇ 10 ⁇ 7 / ° C. or less. At an area ratio of 60%, the difference in expansion coefficient is 8 ⁇ 10 ⁇ 7 / ° C. or less.
- the expansion coefficient is 60 ⁇ 10 ⁇ 7 / ° C. or higher.
- the expansion coefficient is 55 ⁇ 10 ⁇ 7 / ° C. or higher.
- the expansion coefficient is 48 ⁇ 10 ⁇ 7 / ° C. or higher.
- the difference in expansion coefficient between the front glass substrate 3 and the dielectric layer 8 needs to satisfy the following conditions.
- the difference in expansion coefficient is 23 ⁇ 10 ⁇ 7 / ° C. or more.
- the difference in expansion coefficient is 28 ⁇ 10 ⁇ 7 / ° C. or more.
- the difference in expansion coefficient is 35 ⁇ 10 ⁇ 7 / ° C. or more.
- the expansion coefficient is 74 ⁇ 10 ⁇ 7 / ° C. or less.
- the expansion coefficient is 72 ⁇ 10 ⁇ 7 / ° C. or less.
- the expansion coefficient is 68 ⁇ 10 ⁇ 7 / ° C. or less.
- the difference between the expansion coefficients of the front glass substrate 3 and the dielectric layer 8 needs to satisfy the following conditions.
- the difference in expansion coefficient is 9 ⁇ 10 ⁇ 7 / ° C. or less.
- the difference in expansion coefficient is 11 ⁇ 10 ⁇ 7 / ° C. or less.
- the difference in expansion coefficient is 15 ⁇ 10 ⁇ 7 / ° C. or more.
- the expansion coefficient is 65 ⁇ 10 ⁇ 7 / ° C. or higher.
- the expansion coefficient is 61 ⁇ 10 ⁇ 7 / ° C. or higher.
- the expansion coefficient is 55 ⁇ 10 ⁇ 7 / ° C. or higher.
- the difference in expansion coefficient between the front glass substrate 3 and the dielectric layer 8 needs to satisfy the following conditions.
- the difference in expansion coefficient is 18 ⁇ 10 ⁇ 7 / ° C. or more.
- the difference in expansion coefficient is 22 ⁇ 10 ⁇ 7 / ° C. or more.
- the difference in expansion coefficient is 28 ⁇ 10 ⁇ 7 / ° C. or higher.
- the area ratio is calculated from the design value of the front plate 2.
- the area ratio in the front plate 2 that is actually produced has an error of ⁇ 3% due to variations in electrode shape, measurement errors, and the like.
- the area ratio of the display electrode 6 occupying the area of the image display area of the front plate 2 is the vertical axis, and the expansion coefficient of the front glass substrate 3 from room temperature to 300 ° C.
- the difference in expansion coefficient and the area ratio are coordinate (35 ⁇ 10 ⁇ 7 / ° C., 60%) and coordinate (8 ⁇ 10 -7 / ° C, 60%), coordinates (5 ⁇ 10 -7 / ° C, 40%), and coordinates (23 ⁇ 10 -7 / ° C, 40%) It is inside including.
- the difference in expansion coefficient and the area ratio are coordinates (28 ⁇ 10 ⁇ 7 / ° C., 60%), coordinates (15 ⁇ 10 ⁇ 7 / ° C., 60%), and coordinates (9 ⁇ 10 ⁇ 7 / ° C., 40%) and the coordinates (18 ⁇ 10 ⁇ 7 / ° C., 40%) are sequentially connected to the inside including the broken line.
- Dielectric Layer 8 a paste composed of a glass powder component and a resin-containing solvent, a plasticizer, a binder component, and the like is used as a material.
- the paste is applied onto the front glass substrate 3 by a screen printing method or a die coating method.
- the dielectric layer 8 is formed by firing at about 450 ° C. to 600 ° C., more preferably at 550 ° C. to 590 ° C.
- the following method is also used as a method for forming the dielectric layer 8.
- a material a sheet obtained by applying and drying a paste on a film is used.
- the paste formed on the sheet is transferred to the front glass substrate 3.
- the dielectric layer 8 is formed by firing at about 450 ° C. to 600 ° C., more preferably 550 ° C. to 590 ° C.
- the luminance of the PDP 1 is improved as the thickness of the dielectric layer 8 is reduced. Further, the discharge voltage of the PDP 1 decreases as the thickness of the dielectric layer 8 decreases. Therefore, it is preferable that the thickness of the dielectric layer 8 is as small as possible within the range where the withstand voltage does not decrease.
- the film thickness of the dielectric layer 8 is not less than 15 ⁇ m and not more than 41 ⁇ m from both the viewpoints of dielectric strength and visible light transmittance.
- the glass component (dielectric glass) contained in the dielectric layer contains 20% by weight or more of lead oxide.
- a paste containing 0.5 wt% or more and 40 wt% of dibismuth trioxide (Bi 2 O 3 ) is used in the dielectric glass without containing lead oxide. It has been. However, in this case, a voltage load is applied to the minute cracks generated in the dielectric layer 8 and there is a detrimental effect that causes a defective insulation in the corresponding part.
- the dielectric layer 8 is made of dielectric glass having a difference in expansion coefficient within the above-described range.
- the dielectric layer 8 may be made of a dielectric glass material that contains Bi 2 O 3 and does not contain lead oxide.
- the dielectric layer 8 may include barium oxide (BaO) and calcium oxide (CaO).
- BaO barium oxide
- CaO calcium oxide
- the total content of BaO and CaO is 17 mol% or less, more preferably 8 mol% or less.
- BaO and CaO have a larger cation radius in glass than that of silicon dioxide (SiO 2 ) and diboron trioxide (B 2 O 3 ), which are basic oxides constituting the glass. For this reason, it is considered that the dielectric layer 8 contains BaO and CaO, thereby increasing the glass network and increasing the expansion coefficient of the dielectric layer 8.
- the dielectric layer 8 has an excessively large expansion coefficient, and the residual stress of the front glass substrate 3 is in the compression direction. This is not preferable because the insulation reliability of the dielectric layer 8 is lowered.
- the dielectric layer 8 may contain ZnO.
- the ZnO content is 10 mol% or more and 50 mol% or less.
- the cation radius in the glass of ZnO is smaller than the cation radius of BaO or CaO. However, it is larger than the ionic radius of SiO 2 or B 2 O 3 . Therefore, it is considered that the expansion coefficient of the dielectric layer 8 is increased by containing ZnO in the dielectric layer 8. If the content of ZnO exceeds 50 mol%, the expansion coefficient becomes too large, and the residual stress of the front glass substrate 3 becomes the compression direction, which is not preferable because the insulation reliability is lowered. On the other hand, if the ZnO content is less than 10 mol%, the expansion coefficient becomes too small, and the warpage of the front glass substrate 3 becomes large, which is not preferable.
- the dielectric layer 8 may include copper oxide II (CuO) and cobalt oxide (CoO).
- CuO copper oxide II
- CoO cobalt oxide
- the total content of CuO and CoO is 0.1 mol% or more and 0.5 mol% or less.
- CuO causes a reduction reaction from CuO to copper oxide I (Cu 2 O) when the dielectric layer 8 is fired. Therefore, reduction of silver ions (Ag + ) diffusing from the silver (Ag) contained in the display electrode 6 to the dielectric layer 8 is suppressed. Therefore, yellowing of the dielectric layer 8 can be suppressed.
- CuO has the effect of causing the dielectric glass to develop a blue color.
- Cu 2 O has an action of coloring the dielectric glass green.
- the inventors have found the cause of color development and the improvement method.
- CoO is added to the dielectric glass in order to suppress the color variation of the dielectric layer 8 due to the progress of the reduction reaction of CuO.
- CoO has the effect of causing the dielectric glass to develop a blue color, like CuO.
- the dielectric glass can be more stably blue-colored. Therefore, deterioration of the image quality of PDP 1 can be suppressed.
- the total content of CuO and CoO exceeds 0.5 mol%, the blue color of the dielectric glass is too strong and the image quality of the PDP 1 deteriorates.
- reduction of silver ions (Ag + ) cannot be suppressed.
- the linear transmittance of the dielectric layer 8 is lowered.
- the total content of CuO and CoO is 0.5 mol% or less, blue color development is in an optimal range, and the image quality of PDP 1 is also good.
- it is not preferable that the total content of CuO and CoO is less than 0.1 mol% because reduction of silver ions (Ag + ) cannot be suppressed.
- the dielectric layer 8 may include molybdenum trioxide (MoO 3 ).
- MoO 3 molybdenum trioxide
- the content of MoO 3 is 0.3 mol% or more and 2 mol% or less.
- compounds such as Ag 2 MoO 4 , Ag 2 Mo 2 O 7 , Ag 2 Mo 4 O 13 can be obtained at 580 ° C. It is easy to produce at the following low temperatures.
- the firing temperature of the dielectric layer 8 is 550 ° C. to 590 ° C.
- silver ions (Ag + ) diffused into the dielectric layer 8 during firing react with MoO 3 contained in the dielectric layer 8 to generate a stable compound and stabilize it. That is, silver ions (Ag + ) are stabilized without being reduced. Therefore, silver ions (Ag + ) do not aggregate to form a silver (Ag) colloid. Furthermore, the generation of oxygen accompanying colloidalization of silver (Ag) is reduced by stabilization of silver ions (Ag + ). Therefore, the generation of bubbles in the dielectric layer 8 is reduced.
- the Bi 2 O 3 content of the dielectric layer 8 may be 5 mol% or less. Increasing the amount of Bi 2 O 3 can lower the softening point of the dielectric glass. Therefore, there are various advantages such as a low manufacturing process temperature. However, since Bi-based materials are expensive, increasing the amount of Bi 2 O 3 added increases the cost of the raw materials used. Therefore, in this embodiment, as an example, the content of Bi 2 O 3 is 5 mol% or less.
- Bi 2 O 3 is 3.0 mol%
- MoO 3 is 0.7 mol%
- the total of BaO and CaO is 9.6 mol%
- ZnO is 44.2%
- other material compositions are 42
- the expansion coefficient of the dielectric layer 8 formed of dielectric glass containing 0.5 mol% was 73 ⁇ 10 ⁇ 7 / ° C.
- the other material composition is a material composition containing no lead component, such as boron oxide (B 2 O 3 ), silicon oxide (SiO 2 ), aluminum oxide (Al 2 O 3 ).
- a dielectric material powder composed of the exemplified composition components is pulverized by a wet jet mill or a ball mill so as to have an average particle size of 0.5 ⁇ m to 3.0 ⁇ m to produce a dielectric material powder.
- a dielectric layer paste for die coating or printing is manufactured by kneading 50 wt% to 65 wt% of the dielectric material powder and 35 wt% to 50 wt% of the binder component with three rolls. Is done.
- the binder component is terpineol or butyl carbitol acetate containing 1% to 20% by weight of ethyl cellulose or acrylic resin.
- dioctyl phthalate, dibutyl phthalate, triphenyl phosphate, and tributyl phosphate may be added to the dielectric paste as a plasticizer.
- glycerol monooleate, sorbitan sesquioleate, homogenol (product name of Kao Corporation), phosphate of alkyl allyl group, or the like may be added.
- the dielectric paste having such a configuration improves the printability.
- the front plate 2 in which the white electrodes 4b and 5b are stacked on the black electrodes 4a and 5a formed on the front glass substrate 3 and the light shielding layer 7 is formed has been described.
- the present invention is not limited to this.
- the present invention can also be applied to the black plates 4a and 5ba and the front plate 2 on which the light shielding layer 7 is not formed.
- the thermal expansion coefficients of the black pigments included in the black electrodes 4a and 5a and the light shielding layer 7 are smaller than the thermal expansion coefficient of silver (Ag) included in the white electrodes 4b and 5b. Therefore, the present invention can also be applied to the front plate 2 on which the black electrodes 4a and 5a and the light shielding layer 7 are not formed.
- the present invention is useful for realizing a PDP that secures high luminance and high reliability even in high-definition display and further considers environmental problems.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Gas-Filled Discharge Tubes (AREA)
Abstract
Description
本実施の形態のPDP1は、交流面放電型PDPである。図1に示すように、PDP1は前面ガラス基板3などよりなる前面板2と、背面ガラス基板11などよりなる背面板10とが対向して配置される。前面板2と背面板10の外周部がガラスフリットなどからなる封着材によって気密封着されている。封着されたPDP1内部の放電空間16には、NeおよびXeなどの放電ガスが55kPa~80kPaの圧力で封入される。
[2-1.前面板2の製造方法]
まず、前面ガラス基板3上に、走査電極4および維持電極5と遮光層7とが形成される。走査電極4および維持電極5は、導電性を確保するための銀(Ag)を含む白色電極4b、5bを有する。また、走査電極4および維持電極5は、画像表示面のコントラストを向上するため黒色顔料を含む黒色電極4a、5aを有する。白色電極4bは、黒色電極4aに積層される。白色電極5bは、黒色電極5aに積層される。
一方、背面板10は、以下のように形成される。
まず、表示電極6とアドレス電極12とが直交するように、前面板2と背面板10とが対向配置される。次に、前面板2と背面板10の周囲がガラスフリットで封着される。次に、放電空間16にNe、Xeなどを含む放電ガスが封入されることによりPDP1が完成する。
誘電体層8に微小クラックが発生することを抑制し、絶縁信頼性を確保するためには、誘電体層8焼成後に圧縮方向の残留応力が存在することが好ましい。このため、前面ガラス基板3には引張方向の残留応力が存在することが求められる。
本実施の形態では、前面ガラス基板3の残留応力の測定には、偏光歪み計(神港精機株式会社製:ポーラリメータSFII)が用いられた。偏光歪み計は、光の偏光を用いることにより、歪みがある物体を光が通過するときに発生する二つの光の位相差を測定して、歪みの状態および歪みの大きさを測定する。また、前面ガラス基板3に残留応力が存在していれば、前面ガラス基板3に歪みが発生している。よって、偏光歪み計を用いることにより、前面ガラス基板3の残留応力を測定することができる。
本実施の形態では誘電体層8の膨張係数を制御することにより、好適な前面ガラス基板3の残留応力が実現される。より詳細には、前面ガラス基板3に用いられるガラス基板の膨張係数と、誘電体層8の膨張係数の差分を制御することにより、好適な前面ガラス基板3の残留応力が実現される。本実施の形態では、前面ガラス基板3に、室温から300℃における膨張係数が83×10-7/℃のガラス板が用いられた。以降の説明において、膨張係数は、室温から300℃における値である。
まず、材料として、ガラス粉体成分と樹脂を含む溶剤、可塑剤、バインダ成分などから構成されたペーストが用いられる。次に、ペーストが、スクリーン印刷法やダイコート法などにより、前面ガラス基板3上に塗布される。ペーストが乾燥された後、450℃から600℃程度より好ましくは550℃~590℃で焼成されることにより、誘電体層8が形成される。また、誘電体層8を形成する方法として、以下の方法も用いられる。まず、材料として、ペーストをフィルム上に塗布、乾燥させたシートが用いられる。次に、シートに形成されたペーストが前面ガラス基板3に転写される。次に、450℃から600℃程度、より好ましくは550℃~590℃で焼成されることにより、誘電体層8が形成される。
従来、450℃から600℃程度での焼成を可能にするために、誘電体層に含まれるガラス成分(誘電体ガラス)には20重量%以上の酸化鉛が含まれていた。しかし、近年、環境への配慮のため、誘電体ガラス中に酸化鉛を含有せず、0.5重量%以上、40重量%の三酸化二ビスマス(Bi2O3)を含有するペーストが用いられている。しかしこの場合、誘電体層8に発生した微小クラックに電圧負荷がかかり該当部分の絶縁不良を発生させることが顕著になる弊害が伴う。
まず、例示した組成成分からなる誘電体材料が、湿式ジェットミルやボールミルにより平均粒径が0.5μm~3.0μmとなるように粉砕されて誘電体材料粉末が作製される。次に、誘電体材料粉末50重量%~65重量%と、バインダ成分35重量%~50重量%とが、三本ロールで混練されることによりダイコート用あるいは印刷用の誘電体層用ペーストが製造される。
実施の形態では、前面ガラス基板3上に形成された黒色電極4a、5a上に白色電極4b、5bが積層され、さらに、遮光層7が形成された前面板2についての説明がされたが、本発明はこれには限られない。
2 前面板
3 前面ガラス基板
4 走査電極
4a,5a 黒色電極
4b,5b 白色電極
5 維持電極
6 表示電極
7 ブラックストライプ(遮光層)
8 誘電体層
9 保護層
10 背面板
11 背面ガラス基板
12 アドレス電極
13 下地誘電体層
14 隔壁
15 蛍光体層
16 放電空間
Claims (18)
- プラズマディスプレイパネルであって、
前面板と、
背面板と、を備え
前記前面板と前記背面板とが対向配置され周囲を封着して放電空間が形成され、
前記前面板は、前面基板上に表示電極と誘電体層と保護層とを有し、
前記背面板は、背面基板上に電極と隔壁と蛍光体層とを有し、
前記前面板の画像表示領域の面積に占める前記表示電極の面積比率を縦軸とし、
室温から300℃における前記前面基板の膨張係数と室温から300℃における前記誘電体層の膨張係数の差分を横軸として、
前記膨張係数の差分、および前記面積比率が、
座標(35×10-7/℃、60%)と、
座標(8×10-7/℃、60%)と、
座標(5×10-7/℃、40%)と、
座標(23×10-7/℃、40%)と、
を順に直線で結んだ領域の、直線を含む内部にある
プラズマディスプレイパネル。 - 請求項1に記載のプラズマディスプレイパネルであって、
前記膨張係数の差分、および前記面積比率が、
座標(28×10-7/℃、60%)と、
座標(15×10-7/℃、60%)と、
座標(9×10-7/℃、40%)と、
座標(18×10-7/℃、40%)と、
を順に直線で結んだ領域の、直線を含む内部にある、
プラズマディスプレイパネル。 - 請求項1に記載のプラズマディスプレイパネルであって、
前記誘電体層のBaOとCaOの含有量の合計が、17モル%以下である、
プラズマディスプレイパネル。 - 請求項2に記載のプラズマディスプレイパネルであって、
前記誘電体層のBaOとCaOの含有量の合計が、17モル%以下である、
プラズマディスプレイパネル。 - 請求項1に記載のプラズマディスプレイパネルであって、
前記誘電体層のZnOの含有量が、10モル%以上、50%モル以下である、
プラズマディスプレイパネル。 - 請求項2に記載のプラズマディスプレイパネルであって、
前記誘電体層のZnOの含有量が、10モル%以上、50%モル以下である、
プラズマディスプレイパネル。 - 請求項1に記載のプラズマディスプレイパネルであって、
前記誘電体層のCuOとCoOの含有量の合計が、0.1モル%以上、0.5モル%以下である、
プラズマディスプレイパネル。 - 請求項2に記載のプラズマディスプレイパネルであって、
前記誘電体層のCuOとCoOの含有量の合計が、0.1モル%以上、0.5モル%以下である、
プラズマディスプレイパネル。 - 請求項3に記載のプラズマディスプレイパネルであって、
前記誘電体層のCuOとCoOの含有量の合計が、0.1モル%以上、0.5モル%以下である、
プラズマディスプレイパネル。 - 請求項4に記載のプラズマディスプレイパネルであって、
前記誘電体層のCuOとCoOの含有量の合計が、0.1モル%以上、0.5モル%以下である、
プラズマディスプレイパネル。 - 請求項5に記載のプラズマディスプレイパネルであって、
前記誘電体層のCuOとCoOの含有量の合計が、0.1モル%以上、0.5モル%以下である、
プラズマディスプレイパネル。 - 請求項6に記載のプラズマディスプレイパネルであって、
前記誘電体層のCuOとCoOの含有量の合計が、0.1モル%以上、0.5モル%以下である、
プラズマディスプレイパネル。 - 請求項1に記載のプラズマディスプレイパネルであって、
前記誘電体層のMoO3の含有量が、0.3モル%以上、2モル%以下である、
プラズマディスプレイパネル。 - 請求項2に記載のプラズマディスプレイパネルであって、
前記誘電体層のMoO3の含有量が、0.3モル%以上、2モル%以下である、
プラズマディスプレイパネル。 - 請求項3に記載のプラズマディスプレイパネルであって、
前記誘電体層のMoO3の含有量が、0.3モル%以上、2モル%以下である、
プラズマディスプレイパネル。 - 請求項4に記載のプラズマディスプレイパネルであって、
前記誘電体層のMoO3の含有量が、0.3モル%以上、2モル%以下である、
プラズマディスプレイパネル。 - 請求項5に記載のプラズマディスプレイパネルであって、
前記誘電体層のMoO3の含有量が、0.3モル%以上、2モル%以下である、
プラズマディスプレイパネル。 - 請求項6に記載のプラズマディスプレイパネルであって、
前記誘電体層のMoO3の含有量が、0.3モル%以上、2モル%以下である、
プラズマディスプレイパネル。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10723900A EP2251890A1 (en) | 2009-03-13 | 2010-03-11 | Plasma display panel |
US12/866,267 US8362680B2 (en) | 2009-03-13 | 2010-03-11 | Plasma display panel having low residual stress |
CN2010800011114A CN101952930A (zh) | 2009-03-13 | 2010-03-11 | 等离子显示面板 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009060500A JP2010218702A (ja) | 2009-03-13 | 2009-03-13 | プラズマディスプレイパネル |
JP2009-060500 | 2009-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010103836A1 true WO2010103836A1 (ja) | 2010-09-16 |
Family
ID=42728133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/001733 WO2010103836A1 (ja) | 2009-03-13 | 2010-03-11 | プラズマディスプレイパネル |
Country Status (6)
Country | Link |
---|---|
US (1) | US8362680B2 (ja) |
EP (1) | EP2251890A1 (ja) |
JP (1) | JP2010218702A (ja) |
KR (1) | KR101065109B1 (ja) |
CN (1) | CN101952930A (ja) |
WO (1) | WO2010103836A1 (ja) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0950769A (ja) | 1995-05-26 | 1997-02-18 | Fujitsu Ltd | プラズマディスプレイパネル及びその製造方法 |
JP2001045877A (ja) | 1999-08-11 | 2001-02-20 | Okura Ind Co Ltd | 生分解性容器の製造方法 |
JP2002053342A (ja) | 2000-08-10 | 2002-02-19 | Asahi Glass Co Ltd | 電極被覆用低融点ガラス |
WO2002017345A1 (en) * | 2000-08-18 | 2002-02-28 | Matsushita Electric Industrial Co., Ltd. | Gas dischargeable panel |
WO2002019367A1 (en) * | 2000-08-29 | 2002-03-07 | Matsushita Electric Industrial Co., Ltd. | Gas discharge panel |
JP2003128430A (ja) | 2001-10-22 | 2003-05-08 | Asahi Techno Glass Corp | 無鉛ガラス組成物 |
JP2006310098A (ja) * | 2005-04-28 | 2006-11-09 | Fujitsu Ltd | プラズマチューブアレイ |
JP2007212801A (ja) * | 2006-02-10 | 2007-08-23 | Fujitsu Hitachi Plasma Display Ltd | フラットパネルディスプレイおよびそれを備えたディスプレイパネル装置 |
JP2008243522A (ja) * | 2007-03-27 | 2008-10-09 | Matsushita Electric Ind Co Ltd | プラズマディスプレイパネル |
JP2009048927A (ja) * | 2007-08-22 | 2009-03-05 | Nippon Electric Glass Co Ltd | プラズマディスプレイパネル用誘電体材料 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0980769A (ja) | 1995-09-12 | 1997-03-28 | Dainippon Ink & Chem Inc | 電子写真用感光体 |
JP4075775B2 (ja) * | 2003-11-10 | 2008-04-16 | Jsr株式会社 | 無機粉体含有樹脂組成物、転写フィルムおよびプラズマディスプレイパネルの製造方法 |
KR20060000515A (ko) * | 2004-06-29 | 2006-01-06 | 대주전자재료 주식회사 | 플라즈마 디스플레이 패널 격벽용 무연 유리 조성물 |
JP4924985B2 (ja) | 2006-08-04 | 2012-04-25 | 日本電気硝子株式会社 | プラズマディスプレイパネル用誘電体材料 |
KR20080080769A (ko) * | 2007-03-02 | 2008-09-05 | 엘지전자 주식회사 | 플라즈마 디스플레이 패널용 유전체 조성물 및 이를 이용한플라즈마 디스플레이 패널과 그 제조방법 |
JP2010132462A (ja) * | 2007-03-26 | 2010-06-17 | Panasonic Corp | ガラス組成物およびこれを用いたディスプレイパネル |
JP2009199996A (ja) * | 2008-02-25 | 2009-09-03 | Panasonic Corp | フラットディスプレイパネル |
US20110089827A1 (en) * | 2008-05-19 | 2011-04-21 | Panasonic Corporation | Plasma display panel |
-
2009
- 2009-03-13 JP JP2009060500A patent/JP2010218702A/ja active Pending
-
2010
- 2010-03-11 KR KR1020107018449A patent/KR101065109B1/ko not_active IP Right Cessation
- 2010-03-11 WO PCT/JP2010/001733 patent/WO2010103836A1/ja active Application Filing
- 2010-03-11 CN CN2010800011114A patent/CN101952930A/zh active Pending
- 2010-03-11 EP EP10723900A patent/EP2251890A1/en not_active Withdrawn
- 2010-03-11 US US12/866,267 patent/US8362680B2/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0950769A (ja) | 1995-05-26 | 1997-02-18 | Fujitsu Ltd | プラズマディスプレイパネル及びその製造方法 |
JP2001045877A (ja) | 1999-08-11 | 2001-02-20 | Okura Ind Co Ltd | 生分解性容器の製造方法 |
JP2002053342A (ja) | 2000-08-10 | 2002-02-19 | Asahi Glass Co Ltd | 電極被覆用低融点ガラス |
WO2002017345A1 (en) * | 2000-08-18 | 2002-02-28 | Matsushita Electric Industrial Co., Ltd. | Gas dischargeable panel |
WO2002019367A1 (en) * | 2000-08-29 | 2002-03-07 | Matsushita Electric Industrial Co., Ltd. | Gas discharge panel |
JP2003128430A (ja) | 2001-10-22 | 2003-05-08 | Asahi Techno Glass Corp | 無鉛ガラス組成物 |
JP2006310098A (ja) * | 2005-04-28 | 2006-11-09 | Fujitsu Ltd | プラズマチューブアレイ |
JP2007212801A (ja) * | 2006-02-10 | 2007-08-23 | Fujitsu Hitachi Plasma Display Ltd | フラットパネルディスプレイおよびそれを備えたディスプレイパネル装置 |
JP2008243522A (ja) * | 2007-03-27 | 2008-10-09 | Matsushita Electric Ind Co Ltd | プラズマディスプレイパネル |
JP2009048927A (ja) * | 2007-08-22 | 2009-03-05 | Nippon Electric Glass Co Ltd | プラズマディスプレイパネル用誘電体材料 |
Also Published As
Publication number | Publication date |
---|---|
US20110062854A1 (en) | 2011-03-17 |
CN101952930A (zh) | 2011-01-19 |
US8362680B2 (en) | 2013-01-29 |
EP2251890A1 (en) | 2010-11-17 |
JP2010218702A (ja) | 2010-09-30 |
KR101065109B1 (ko) | 2011-09-16 |
KR20100115357A (ko) | 2010-10-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4089739B2 (ja) | プラズマディスプレイパネル | |
US7931948B2 (en) | Plasma display panel | |
JP4089740B2 (ja) | プラズマディスプレイパネル | |
KR100978430B1 (ko) | 플라즈마 디스플레이 패널 | |
JP5233488B2 (ja) | プラズマディスプレイパネル | |
US8350474B2 (en) | Plasma display panel having a dielectric layer | |
WO2010103836A1 (ja) | プラズマディスプレイパネル | |
JP5245224B2 (ja) | プラズマディスプレイパネル | |
JP5228821B2 (ja) | プラズマディスプレイパネル | |
WO2010150533A1 (ja) | プラズマディスプレイパネル | |
JP4329861B2 (ja) | プラズマディスプレイパネル | |
JP4382148B2 (ja) | プラズマディスプレイパネル | |
JP4329862B2 (ja) | プラズマディスプレイパネル | |
JP2011165365A (ja) | プラズマディスプレイパネル | |
JP2011014482A (ja) | プラズマディスプレイパネル | |
JP2011258400A (ja) | プラズマディスプレイパネル |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080001111.4 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010723900 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12866267 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20107018449 Country of ref document: KR Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10723900 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |