JP2012031352A - Plasma display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the charging stability of a phosphor layer and achieve a high-quality plasma display.SOLUTION: In a plasma display device, stored charges accumulated on a surface of a red phosphor layer, a green phosphor layer, and a blue phosphor layer are all positive, the red phosphor layer contains both first phosphor particles composed of phosphor particles only and second phosphor particles whose surfaces are covered with oxide, wherein both the first and second phosphor particles are composed of the identical phosphor particles, and the phosphor particles are YPxVO:Eu.

Description

  The present invention relates to an AC plasma display panel (hereinafter referred to as PDP), and more particularly to a fluorescent film in a surface discharge type PDP.

  Plasma display panels (hereinafter referred to as PDP) used in this plasma display device are roughly classified into AC type and DC type in terms of driving, and there are two types of discharge types: surface discharge type and counter discharge type. . In recent years, a surface discharge type with a three-electrode structure has been adopted as the mainstream of plasma display devices because of high definition, large screen, and easy manufacturing. The structure of this surface discharge type PDP is composed of a pair of panels including a front panel and a rear panel disposed opposite to the front panel via a discharge space. In order to partition this discharge space into a plurality, a plurality of barrier ribs are disposed on the rear panel, and an electrode group is disposed on the front panel and the rear panel so that discharge occurs in the discharge space partitioned by the barrier ribs. The back panel includes a plurality of discharge cells having phosphors that emit red, green, and blue light that are emitted when a discharge occurs. Each phosphor is excited by vacuum ultraviolet light having a short wavelength generated by discharge, and red, green, and blue visible light is generated from discharge cells having red, green, and blue phosphors, respectively.

  As a result, color display can be performed on the PDP screen.

  When displaying various images on the PDP, the discharge is controlled within the range of the difference between the discharge start voltage and the sustain voltage (hereinafter referred to as the operation margin) in the discharge cells that generate visible light of red, green, and blue. Various displays are performed. This discharge control is performed at a specific voltage value within an operating margin range where the color discharge cells overlap. However, since the red cell is easy to discharge and the green cell is difficult to discharge, the overall operation margin range is small. This is because the charge amount of the accumulated charge accumulated on each phosphor layer differs depending on each phosphor. As a result, the yield of the panel and the image quality are reduced. Furthermore, the cells of each color have a problem that the discharge start voltage changes with time due to repeated discharge and the operation margin is further narrowed. Therefore, in order to perform stable discharge control, attempts have been made to make the amount of charge accumulated on the surface of the phosphor layer uniform.

  For example, Patent Document 1 discloses a phosphor film formed of a borate phosphor or an yttrium oxide phosphor and at least one of a silicate phosphor, a phosphate phosphor, and an aluminate phosphor. Disclosure of the phosphor film in which the borate phosphor or the yttrium oxide phosphor contains an oxide having a negative charge, or the phosphor particle surface is coated with an oxide having a negative charge. is there.

Japanese Patent No. 3725725

However, when an oxide is coated on the surface of the phosphor particles, the oxide coverage must be adjusted so that the desired charging effect is obtained. However, since the chargeability changes greatly by adjusting the coverage, the chargeability cannot be easily controlled. In particular, the red phosphor used as the material _{YP x V (1-x)} O 4: Eu ( here, x is 0 or more and 1 or less) has a large charge of the change. As a result, when the red phosphor layer is formed on the panel, the voltage characteristics become unstable, and the image quality may be deteriorated.

  In view of the above, an object of the present invention is to achieve charging stability during mass production of a PDP and to reduce deterioration in image quality by stabilizing the voltage characteristics of the panel.

The plasma display panel according to the present invention is a plasma display panel having a red phosphor layer, a green phosphor layer, and a blue phosphor layer, and the red phosphor layer, the green phosphor layer, and the blue phosphor layer have chargeability. The first phosphor particles having the same polarity, the red phosphor layer being composed of the same phosphor particles, and the surface of the phosphor particles covered with an oxide, and the second fluorescence only of the phosphor particles and a body particles are mixed, the phosphor _{particles, YP x V (1-x} ) O 4: Eu ( here, x is 0 or more and 1 or less) is characterized in that it is.

  It is possible to provide a high-quality plasma display panel in which the operation margin of the PDP can be increased, the yield of the PDP is improved, and the deterioration of image quality due to erroneous discharge is improved.

The top view which shows schematic structure of the electrode of PDP in embodiment of this invention The partial cross-section perspective view in the image display area of PDP in embodiment of this invention Schematic which shows the structure of the PDP apparatus in one embodiment of this invention. (A) The figure which shows typically a part of fluorescent substance layer in PDP by one embodiment of this invention, (b) The part of fluorescent substance layer in PDP by one embodiment of this invention is shown typically. Figure Graph showing the relationship between coverage and charge amount for charge amount adjustment The graph which shows the relationship between the mixing ratio of the fluorescent substance and charge amount by one embodiment of this invention

Hereinafter, a PDP according to an embodiment of the present invention will be described in detail with reference to the drawings.
<Embodiment>
1. Plasma display panel FIG. 1 is a plan view showing a schematic configuration of electrodes in a PDP according to an embodiment of the present invention, and shows a state in which a front plate (not shown) is removed.

  PDP 100 includes a front glass substrate (not shown) and a back glass substrate 102. On the front plate made of glass or the like, a plurality of display electrode pairs each including the sustain electrode 103 and the scan electrode 104 are formed in parallel to each other. A dielectric layer is formed so as to cover scan electrode 104 and sustain electrode 103, and a protective layer is formed on the dielectric layer. Since this protective layer has a large secondary electron emission coefficient and excellent durability when neon (Ne) and xenon (Xe) gas is sealed, the discharge start voltage in the discharge cell is lowered. A plurality of address electrodes 107 are formed on the rear glass plate 102, a dielectric layer is formed so as to cover the address electrodes 107, and a grid-like partition is further formed thereon. A phosphor layer that emits light of each color of red (R), green (G), and blue (B) is provided on the side surface of the partition wall and on the dielectric layer. The front plate and the back plate are arranged to face each other so that the display electrode pair and the address electrode 107 cross each other with a minute discharge space interposed therebetween, and the outer peripheral portion thereof is sealed with a sealing material such as a glass frit. . A mixed gas of neon (Ne) and xenon (Xe) is sealed as a discharge gas in the internal discharge space. In the present embodiment, a discharge gas having a xenon partial pressure of about 10% is used in order to improve luminous efficiency. The discharge space is partitioned into a plurality of sections by partition walls, and discharge cells are formed at the intersections between the display electrode pairs and the address electrodes 107. These discharge cells discharge and emit light to display an image.

  Note that the structure of the PDP 100 is not limited to that described above, and for example, a structure having stripe-shaped partition walls may be used. Further, the mixing ratio of the discharge gas is not limited to the above-described numerical values, and may be other mixing ratios.

  In the PDP 100, n scanning electrodes 104 and n sustain electrodes 103 that are long in the row direction are arranged, and m address electrodes 107 that are long in the column direction are arranged. A discharge cell is formed at a portion where a pair of scan electrode and sustain electrode intersects with one address electrode. That is, the sustain electrode 103, the scan electrode 104, and the address electrode 107 have a three-electrode structure, and a discharge cell is formed at the intersection of the scan electrode 104 and the address electrode 107. Therefore, m × n discharge cells are formed in the discharge space.

  FIG. 2 is a partial cross-sectional perspective view showing a schematic configuration in the image display area of the PDP according to the embodiment of the present invention. The PDP 100 includes a front panel 130 and a back panel 140. A sustain electrode 103, a scan electrode 104, a dielectric glass layer 105, and an MgO protective layer 106 are formed on the front glass substrate 101 of the front panel 130. On the rear glass substrate 102 of the rear panel 140, address electrodes 107, a base dielectric glass layer 108, barrier ribs 109, and phosphor layers 110R, 110G, and 110B (hereinafter also referred to as phosphor layer 110) are formed. Then, the front panel 130 and the back panel 140 are bonded together, and the discharge gas is sealed in the discharge space 122 formed between the front panel 130 and the back panel 140, thereby completing the PDP 100.

  FIG. 3 is a block diagram schematically showing a configuration of a PDP device using the PDP 100 according to an embodiment of the present invention. The PDP 100 is connected to the driving device 150 to constitute a PDP device. A display driver circuit 153, a display scan driver circuit 154, and an address driver circuit 155 are connected to the PDP 100. The controller 152 controls the application of these voltages. Address discharge is performed by applying a predetermined voltage to the scan electrodes 104 and the address electrodes 107 corresponding to the discharge cells to be lit. The controller 152 controls this voltage application. Thereafter, a sustain discharge is performed by applying a pulse voltage between sustain electrode 103 and scan electrode 104. Due to the sustain discharge, ultraviolet rays are generated in the discharge cells in which the address discharge has been performed. The discharge cell is turned on when the phosphor layer excited by the ultraviolet light emits light. An image is displayed by a combination of lighting and non-lighting of each color cell.

2. Method for Manufacturing Plasma Display Panel Next, a method for manufacturing the PDP 100 will be described with reference to FIGS. First, a method for manufacturing the front panel 130 will be described. On the front glass substrate 101, N sustain electrodes 103 and scan electrodes 104 are formed in stripes. Thereafter, sustain electrode 103 and scan electrode 104 are coated with dielectric glass layer 105. Further, an MgO protective layer 106 is formed on the surface of the dielectric glass layer 105.

The sustain electrode 103 and the scan electrode 104 are formed by applying a silver paste for an electrode containing silver as a main component by screen printing, followed by baking. The dielectric glass layer 105 is formed by applying a paste containing a bismuth oxide glass material by screen printing and then baking. The paste containing the glass material is, for example, 30 wt% bismuth oxide (Bi ₂ O ₃ ), 28 wt% zinc oxide (ZnO), 23 wt% boron oxide (B ₂ O ₃ ), and 2.4 wt%. % Silicon oxide (SiO ₂ ) and 2.6% by weight aluminum oxide. Further, it is formed by mixing 10% by weight of calcium oxide (CaO), 4% by weight of tungsten oxide (WO ₃ ) and an organic binder (10% ethyl cellulose dissolved in α-terpineol). Here, the organic binder is obtained by dissolving a resin in an organic solvent. In addition to ethyl cellulose, an acrylic resin can be used as the resin, and butyl carbitol can be used as the organic solvent. Furthermore, you may mix a dispersing agent (for example, glyceryl trioleate) in such an organic binder.

  The coating thickness of the dielectric glass layer 105 is adjusted so as to have a predetermined thickness (about 40 μm). The MgO protective layer 106 is made of magnesium oxide (MgO), and is formed to have a predetermined thickness (about 0.5 μm) by, for example, a sputtering method or an ion plating method.

  Next, a method for manufacturing the back panel 140 will be described. On the back glass substrate 102, silver paste for electrodes is screen-printed and baked to form M address electrodes 107 in stripes. A paste containing a bismuth oxide glass material is applied on the address electrode 107 by a screen printing method and then baked to form a base dielectric glass layer 108. Similarly, a paste containing a glass material based on bismuth oxide is repeatedly applied at a predetermined pitch by a screen printing method and then baked to form partition walls 109. The discharge space 122 is partitioned by the barrier ribs 109 to form discharge cells. The distance between the barrier ribs 109 is set to about 130 μm to 240 μm in accordance with a full HD television of 42 inches to 50 inches and an HD television.

  In a groove between two adjacent barrier ribs 109, a red phosphor layer 110R, a green phosphor layer 110G, and a blue phosphor layer 110B are formed by a screen printing method.

Red phosphor layer 110R is, for example, _{Y (P x V 1-x} ) O 4: Eu ( here, x is 0 or more and 1 or less) Red phosphor (hereinafter, referred to as first phosphor) and 161R, A red phosphor in which the surface of phosphor particles 160 of Y (P _x V _{1 -x} ) O ₄ : Eu (where x is 0 or more and 1 or less) is covered with an oxide 163 such as SiO ₂ (hereinafter referred to as a second phosphor). A mixture of 162R).

The green phosphor layer 110G includes, for example, a green phosphor of Zn ₂ SiO ₄ : Mn.

The blue phosphor layer 110B includes, for example, a blue phosphor of BaMgAl ₁₀ O ₁₇ : Eu.

  Each of these phosphor layers is formed of a phosphor paste. This phosphor paste is produced by mixing various phosphors, a binder (for example, ethyl cellulose), a solvent (for example, α-terpineol), and the like.

  The front panel 130 and the back panel 140 manufactured as described above are overlapped with each other so that the scanning electrode 104 of the front panel 130 and the address electrode 107 of the back panel 140 intersect each other. Sealing glass is applied to the periphery and baked at about 450 ° C. for 10 minutes to 20 minutes.

  As shown in FIG. 1, the front panel 130 and the back panel 140 are sealed by the hermetic seal layer 121. Then, after evacuating the inside of the discharge space 122 to a high vacuum, a discharge gas (for example, helium-xenon-based or neon-xenon-based inert gas) is sealed at a predetermined pressure to complete the PDP 100.

3. Phosphor The PDP 100 according to the embodiment of the present invention manufactured as described above has been described.

  Next, the material structure in the fluorescent layer 110 in the PDP 100 in the present embodiment will be described.

FIG. 4 schematically shows a part of the red phosphor layer 110R in the PDP according to the embodiment of the present invention. In this embodiment, as shown in FIG. 4 (a), a red phosphor layer 110R is, as a red _{phosphor, Y (P x V 1-} x) O 4: Eu ( here, x is 0 or more and 1 or less a first phosphor 161R _{of), Y (P x V 1} -x) O 4: Eu ( however, x is a second phosphor oxide 163 of SiO ₂ is deposited on the surface of 0 or more and 1 or less) 162R is mixed. The red phosphor layer 110R is configured by this mixing.

Here, the manufacturing method of YPV is demonstrated. A raw material containing at least yttrium oxide (Y ₂ O ₃ ), a phosphorus compound ((NH ₄ ) ₂ HPO ₄ ), vanadium oxide (V ₂ O ₅ ), and europium oxide (Eu ₂ O ₃ ) is mixed. Next, the mixture is heat-treated at about 1000 to 1150 ° C. for several hours in the air atmosphere and then classified to obtain phosphor particles 160. Alternatively, it can also be produced by a wet method. In this case, YVO ₄ : Eu ³⁺ and YPO ₄ : Eu ³⁺ are separately precipitated, and both precipitates are mixed together with a flux, which is about When the particles are classified after heat treatment at 1000 to 1300 ° C. for several hours, phosphor particles 160 are completed. The surface of the phosphor particles 160 that is not subjected to any treatment is referred to as a first phosphor 161R.

Further, a method of manufacturing the second phosphor 162R by covering the surface of the phosphor particle 160 with the SiO ₂ oxide 163 will be described. A suspension of phosphor particles 160 and a necessary suspension of SiO ₂ oxide 163 (particle size is 1/10 or less of the phosphor) are mixed, stirred, filtered with suction, and dried at 125 ° C. or higher. And firing at 350 ° C. In order to improve the adhesive force between the phosphor particles 160 and the SiO ₂ oxide 163, a small amount of resin, organic silane compound, water glass or the like may be added.

In addition, the red phosphor particles 160 and the oxide SiO ₂ powder are put into a solution of ethyl silicate Si (O · C ₂ H ₅ ) ₄ and ethyl alcohol C ₂ H ₅ OH, which are metal alkoxides, and stirred. To do. Thereafter, this is washed with water, dehydrated, dried, and then fired at about 500 ° C., whereby the surface of the phosphor particles 160 can be covered with the oxide 163. That is, the second phosphor 162R is formed.

  Then, the first phosphor 161R and the second phosphor phosphor 162R are mixed in accordance with the desired charge amount to complete the red phosphor layer 110R.

Note that in this embodiment, SiO ₂ is used as the oxide 163, but other oxides may be used as long as they are negatively charged oxides. For _{example, B 2 O 3, WO 3} , Al 2 O 3, Y 2 O 3, MgO , and the like. As shown in FIG. 4A, the surface of phosphor particles 160 of Y (P _x V _{1 -x} ) O ₄ : Eu (where x is 0 or more and 1 or less) is covered with an oxide 163 of SiO _2. In this case, a thin film of SiO ₂ is coated on the surface of Y (P _x V _1-x ) O ₄ : Eu (where x is 0 or more and 1 or less) 161R. On the other hand, FIG. 4 oxide 164 of MgO as shown in (b) is _{Y (P x V 1-x} ) O 4: Eu ( here, x is 0 or more and 1 or less) on the surface of the 161R, covered In this case, MgO powder is attached. In any case, the SiO ₂ oxide 163 or MgO oxide 164 and the surface of the phosphor particles 160 are not chemically bonded.

  Next, the charge amount (μC / g) of accumulated charges accumulated on the surface of the red phosphor layer 110R will be described. However, the measurement of the charge amount (μC / g) described below is not the charge amount of the accumulated charge when the red phosphor layer 110R is formed, but the charge amount (μC / g) in the powder state in which the phosphor particles are mixed. g). The effect of the charge amount in the powder state can be applied as the effect of the red phosphor layer 110R.

The charge amount (μC / g) was measured by changing the amount of SiO ₂ covering the surface of the red phosphor Y (P _x V _1-x ) O ₄ : Eu (where x is 0 or more and 1 or less). FIG. 5 shows the charge amount (μC / g) by changing the amount of SiO ₂ covering the surface of the red phosphor Y (P _x V _1−x ) O ₄ : Eu (where x is 0 or more and 1 or less). Each measurement result is shown. Then, as shown in FIG. 5, the horizontal axis is in the process of covering the surface of the phosphor particles 160 previously described with SiO _2, the added SiO ₂ in an amount of phosphor particles _{YP x V (1-x)} O ₄ : Shown as a weight ratio to Eu (where x is 0 or more and 1 or less). The vertical axis indicates the charge amount (μC / g) at each weight ratio.

That is, FIG. 5 shows how much SiO ₂ is coated on the surface of the phosphor particles 160 in the red phosphor layer 110R depending on the amount of SiO ₂ added. In other words, the more the left side of the horizontal axis in FIG. 5 moves to the left, the greater the proportion of the surface of the phosphor particles 160 that is not covered with SiO ₂ and exposed. On the other hand, the more the particles move to the right, the larger the ratio of the surface of the phosphor particles 160 covered with SiO ₂ . When the amount of oxide added exceeds a certain value, the charge amount is saturated. Hereinafter, the covering ratio is defined as the covering ratio, and the state of the phosphor particles in which the charge amount has reached saturation will be described assuming that the covering ratio is 100%.

  The charge amount (μC / g) of the accumulated charge is measured by the blow-off measurement method which is the most common powder charge measurement method (powder charge amount measuring device TYPE TB-203 Kyocera Chemical). Corporation).

As shown in FIG. 5, as the amount of SiO ₂ covering the surface of the phosphor particle 160 is increased, the charge amount (μC / g) of the accumulated charge on the surface of the red phosphor layer 110R changes sharply. That is, when the surface coating of the phosphor particles 160 starts, the charge amount (μC / g) rapidly decreases. When the surface coverage becomes 100%, the surfaces of the phosphor particles 160 are completely covered with SiO ₂ . That is, when the charge amount is −10 μC / g, the phosphor particles 160 are completely coated with SiO ₂ , that is, the second phosphor 162R is completed. Therefore, further, even if an attempt is coated with SiO _2, no portion of the newly covered because there is no portion exposed at the surface of the phosphor particles 160. Therefore, the charge amount (μC / g) is saturated.

  Conventionally, the charge amount of accumulated charge required on the surface of the red phosphor layer 110R is smaller than the charge amount (μC / g) when the surface of the phosphor particle 160 is completely covered with the oxide 163. Thus, a phosphor was prepared in which the surface coverage of the phosphor particles 160 was adjusted so that a desired charge amount (μC / g) was obtained. That is, the coverage is adjusted so that a part of the surface of the phosphor particle 160 is covered with the oxide 163. However, when adjusting the coverage with which the surface of the phosphor particle 160 is coated, as shown in FIG. 5, it is necessary to adjust in a region where the charge amount (μC / g) changes sharply. Therefore, the stability of the charge amount (μC / g) of the positive accumulated charge that finally accumulates on the surface of the red phosphor layer 110R after the manufacture of the plasma display device becomes very low.

Therefore, in the present embodiment, the first phosphor 161R that is not covered with an oxide at all and the second phosphor 162R whose surface of the phosphor particle 160 is completely covered with an oxide (the coverage shown in FIG. 5). The charge amount (μC / g) is adjusted by the mixing ratio with the phosphor corresponding to 100%. In the present embodiment, phosphor particles 160 are covered with SiO ₂ as an oxide.

FIG. 6 shows the charge amount (μC / g) when the mixing ratio of the first phosphor 161R and the second phosphor 162R in which phosphor particles 160 are covered with 1500 ppm of SiO ₂ is changed. It is. As shown in FIG. 6, the horizontal axis represents the mixing ratio between the first phosphor 161R and the second phosphor 162R in which the surface of the phosphor particle 160 is completely covered with 1500 ppm of SiO ₂ . That is, the presence rate of the second phosphor 162R is lower toward the left side, and the presence rate of the second phosphor 162R is higher toward the right side. The vertical axis indicates the charge amount (μC / g) of the accumulated charge of the red phosphor layer 110R at each mixing ratio.

  The charge amount (μC / g) of the accumulated charge is measured in the same way as in FIG. 5 by the blow-off charge measurement method (powder charge amount measurement device TYPE TB-203 Kyocera Chemical Co., Ltd.) which is the most common powder charge measurement method. Company).

  As shown in FIG. 6, by changing the mixing ratio of the first phosphor 161R and the second phosphor 162R, the charge amount of the accumulated charge is approximately linear from 40 μC / g to −10 μC / g. change.

  For example, the graph shown in FIG. 5 indicates that when the red phosphor layer 110R requires a charge amount of 10 μC / g, the mixing ratio of the first phosphor 161R and the second phosphor 162R may be set to 1. I understand.

In this embodiment, the red phosphor particles 160 are covered with Y (P _x V _1−x ) O ₄ : Eu (where x is 0 or more and 1 or less) and SiO _2. It is not specified.

Y (P _x V _1-x ) O ₄ : Eu (where x is 0 or more and 1 or less) when covered with B ₂ O ₃ , WO ₃ , Al ₂ O ₃ , Y ₂ O ₃ , MgO Even when the second phosphor is used, a change in charge amount (μC / g) at the same accumulated charge can be seen.

Further, for _{example, Y (P x V 1-} x) O 4: Eu ( here, x is 0 or more and 1 or less) and the second phosphor 162R which SiO ₂ is covered on the surface of, Y (P _x V _1-x ) O ₄ : Eu (where x is 0 or more and 1 or less) a phosphor having another oxide covered thereon, and Y (P _x V _1-x ) O ₄ : Eu (where x may be mixed with a first phosphor 161R that is not covered with a surface of 0 to 1).

  This makes it possible to more efficiently adjust the charging in the red phosphor layer 110R depending on the characteristics of each oxide.

  In this embodiment, as described above, by mixing the second phosphor 162R and the first phosphor 161R, the change in the charge amount (μC / g) is made linear by the mixing ratio. Can do. As a result, it becomes easier to obtain the red phosphor layer 110R aimed at the required charge amount (μC / g). Furthermore, charging stability during mass production can be ensured, and deterioration in image quality can be reduced.

  Therefore, from the correlation between the mixing ratio and the charge amount (μC / g) shown in FIG. 5 and FIG. 6 and the correlation between the surface coverage by the oxide and the charge amount, It is not necessary to consider the variation in the oxide film ratio, and it is possible to select a wide range of phosphor layers in the region where the charge amount (μC / g) of accumulated charge is saturated. Then, the final accumulated charge amount (μC / g) on the surface of the phosphor layer is stabilized. The operation margin of the PDP can be increased, and a high-quality PDP with improved panel yield and image quality can be realized.

  As described above, the present invention is useful for providing an AC plasma display panel and a plasma display display device.

100 PDP
DESCRIPTION OF SYMBOLS 101 Front glass substrate 102 Back glass substrate 103 Sustain electrode 104 Scan electrode 105 Dielectric glass layer 106 MgO protective layer 107 Address electrode 108 Base dielectric glass layer 109 Partition 110R Red phosphor layer 110G Green phosphor layer 110B Blue phosphor layer 121 Hermetic seal layer 122 Discharge space 130 Front panel 140 Rear panel 150 Driving device 152 Controller 153 Display driver circuit 154 Display scan driver circuit 155 Address driver circuit 160 Phosphor particle 161R First phosphor 162R Second phosphor 163 Oxide ( SiO ₂ )
164 Oxide (MgO)

Claims (3)

A plasma display panel having a red phosphor layer, a green phosphor layer, and a blue phosphor layer, wherein the red phosphor layer, the green phosphor layer, and the blue phosphor layer have the same chargeability, and The red phosphor layer is composed of the same phosphor particles, the first phosphor particles only of the phosphor particles, and the second phosphor particles covered with an oxide on the surface of the phosphor particles, There are mixed, the phosphor _{particles, YP x V (1-x} ) O 4: Eu ( here, x is 0 or more and 1 or less) plasma display panel, which is a. _2. The plasma display panel according to claim 1, wherein the oxide is selected from any one of SiO ₂ , B ₂ O ₃ , WO ₃ , Al ₂ O ₃ , Y ₂ O ₃ , and MgO. . A method of manufacturing a plasma display panel for forming a red phosphor layer, a green phosphor layer, and a blue phosphor layer, the step of producing the first phosphor particles, and a surface of the first phosphor particles Producing a second phosphor covered with the oxide, and producing a phosphor layer in which the first phosphor particles and the second phosphor particles are mixed. A method of manufacturing a plasma display panel.

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