JP2000323048A - Plasma display member and plasma display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve blue luminance and display quality by forming a blue dielectric layer of a display member where an electrode dielectric layer, and a barrier rib for partitioning a discharge space, and a luminescent layer for emitting red, green, and blue lights are formed. SOLUTION: Preferably, in this plasma display member, chromaticity, coordinates (x, y) of a dielectric layer are in a range of 0.05<=x<0.31, and 0.05<=y<0.32, the dielectric layer contains 0.05-30 wt.% blue pigment, and a barrier rib is blue. An address electrode is formed from Ag, Al, Cr, or Ni on a glass substrate. As a forming method, a method where a metallic paste mainly containing their metallic powder and an organic binder is screen-printed is used, and thickness of the electrode is preferably 1-10 μm, for example. The dielectric layer is formed by applying glass paste formed by mixing the pigment, glass powder, and organic binder to the substrate having the electrode and burning them. The thickness is preferably 4-20 μm, for example.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display member used for a wall-mounted television or a large monitor, and more particularly to a plasma display panel in which the blue luminance of a plasma display panel is improved and the display quality of the panel is improved.

[0002]

2. Description of the Related Art A plasma display (hereinafter abbreviated as PDP) has attracted attention as a display that can be used for a thin and large-sized television. In a PDP, a plurality of pairs of sustain electrodes are formed of a material such as silver, chromium, aluminum, or nickel on a glass substrate on a front plate side serving as a display surface. Further, a dielectric layer mainly composed of glass is formed in a thickness of 20 to 50 μm to cover the sustain electrode, and an MgO layer is formed to cover the dielectric layer.
On the other hand, a plurality of address electrodes are formed in a stripe shape on the glass substrate on the back plate side, and a dielectric layer mainly composed of glass is formed so as to cover the address electrodes. A partition for dividing discharge cells is formed on the dielectric layer, and a phosphor layer is formed in a discharge space formed by the partition and the dielectric layer. In a PDP capable of full color display, the phosphor layer is configured to emit light of each color of RGB. The front plate and the back plate are sealed so that the sustain electrodes of the glass plate on the front plate side and the address electrodes on the back plate side are orthogonal to each other, and are formed of helium, neon, xenon, etc. in the gap between those substrates. A rare gas is sealed to form PDP. Since the pixel cell is formed around the intersection of the scan electrode and the address electrode, the PDP has a plurality of pixel cells, and an image can be displayed.

When a display is performed on a PDP, when a voltage equal to or higher than the discharge starting voltage of the sealing gas is applied between a sustain electrode and an address electrode in a selected pixel cell from a state where light is not emitted, cations generated by ionization And the electrons move in the discharge space toward the electrode of the opposite polarity due to the capacitive load of the pixel cell, and are charged on the inner walls of the MgO layers on both sides, and the charges on the inner walls have a high resistance of the MgO layer. It remains without attenuation. An electric field having a polarity opposite to that of an externally applied voltage is formed in the discharge space by the wall charges, so that the electric field in the cell is weakened and the discharge is immediately stopped.

Next, a discharge is maintained by applying a sustaining voltage between the scan electrodes. The discharge at a voltage lower than the discharge starting voltage is continued by the wall charges. The discharge excites the xenon gas in the discharge space, resulting in 147 nm
UV light is generated, and the UV light excites the fluorescent material, thereby enabling light emission display.

In a PDP, there is a problem that the contrast is reduced by reflection of light (external light) radiated from the outside such as sunlight or indoor light. When the partition walls are white, the screen reflects external light when the screen is not emitting light, so that the ratio of the luminance at the time of light emission to the luminance at the time of no light emission is reduced, and the contrast is reduced.

As one of means for solving this problem, there is disclosed a technique of blackening a partition wall or blackening an upper portion of a partition wall (Japanese Patent Laid-Open No. 11-16500).

[0007]

However, in this method, since the light emitted from the phosphor is absorbed by the partition walls, there is a problem that the luminance is reduced. In particular, a decrease in blue luminance is a major obstacle to increasing the luminance of PDPs.

Further, with respect to a phosphor generally used for a PDP, the luminance of light emitted by excitation with ultraviolet rays is B, G, R.
(Blue, green, red) in that order, the panel becomes reddish and display quality is degraded. Also, in order to improve the reddish point, there is a method of reducing the red luminance by shortening the red light emission time at the time of display. However, when this is adopted, the luminance at the time of full white lighting is reduced. Occurs.

Further, a method of forming a color filter on the front plate corresponding to a portion emitting light of each color of RGB formed on the rear plate has been proposed, but the process of forming the RGB color filters is complicated. There is a disadvantage that the manufacturing cost is increased.

Accordingly, an object of the present invention is to improve the problem of low blue luminance of a PDP and to provide a PDP excellent in display quality and a member thereof.

[0011]

That is, the present invention provides an electrode, a dielectric layer, and a partition for partitioning a discharge space on a substrate.
And a plasma display member having a phosphor layer that emits light of each color of red, green, and blue, wherein the dielectric layer is blue.

The present invention is also a member for a plasma display comprising a substrate, on which an electrode, a dielectric layer, a partition for partitioning a discharge space, and a phosphor layer emitting red, green, and blue light are formed. , Wherein the chromaticity coordinates (x, y) of the dielectric layer are in the following range. 0.05 ≦ x <0.31 0.05 ≦ y <0.32 The present invention also provides an electrode, a partition for partitioning a discharge space, and a phosphor layer which emits red, green, and blue light on a substrate. Is a member for a PDP, wherein the dielectric layer contains a blue pigment.

Further, the present invention provides any of the above PDPs
A PDP characterized in that the member for use is used as a back plate.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in accordance with a PDP member and a PDP manufacturing procedure.

As the glass substrate used for the PDP member of the present invention, besides soda glass, heat-resistant glass for PDP such as "PD200" manufactured by Asahi Glass Co., Ltd. or "PP8" manufactured by Nippon Electric Glass Co., Ltd. may be used. it can.

An address electrode is formed on a glass substrate by using a metal such as silver, aluminum, chromium or nickel. As a method of forming, a method of pattern-printing a metal paste containing these metal powders and an organic binder as main components by screen printing, or applying a photosensitive metal paste using a photosensitive organic component as an organic binder, and applying a photo Pattern exposure is performed using a mask, unnecessary portions are dissolved and removed in a developing step, and further heated to 400 to 600 ° C.
A photosensitive paste method in which a metal pattern is formed by baking may be used. In addition, an etching method in which a metal such as chromium or aluminum is sputtered on a glass substrate, a resist is applied, and the resist is subjected to pattern exposure and development, followed by etching to remove an unnecessary portion of the metal by etching can be used. The electrode thickness is preferably from 1 to 10 μm, more preferably from 2 to 5 μm. If the electrode is too thin, the resistance value tends to be large and accurate driving tends to be impossible. If the electrode is too thick, a large amount of material is required and the cost tends to be disadvantageous. Address electrode width is 20-200μ
m is preferred, and more preferably 30 to 100 μm. If the address electrodes are too thin, the resistance value tends to be high and accurate driving tends to be difficult. If the address electrodes are too thick, the distance between adjacent electrodes is small, and short-circuit defects tend to occur. Further, the address electrodes are formed at a pitch corresponding to the display cell (the area where each RGB of a pixel is formed). It is preferable that the pitch is formed at a pitch of 100 to 500 μm for a normal PDP and 100 to 250 μm for a high definition PDP.

Next, a dielectric layer is formed. The dielectric layer is formed by applying a glass paste obtained by kneading a pigment, a glass powder, an organic binder, etc. onto the substrate on which the electrodes are formed,
It can be formed by firing at 00 to 600 ° C. The thickness of the dielectric layer is preferably 4 to 20 μm.

In the PDP member of the present invention, it is important that the dielectric layer is blue or its chromaticity coordinates are within the following ranges. 0.05 ≦ x <0.31 0.05 ≦ y <0.32 Here, the chromaticity coordinates are measured using C light of x = 0.31 and y = 0.32. In other words, when the chromaticity coordinates are x = 0.31 and y = 0.32, the partition walls are transparent to white to gray to black to achromatic color. However, x and y are made smaller and bluish. It is important that the colors are different. Thus, when the blue phosphor emits light, the dielectric layer reflects the blue light to increase the luminance. Also, when light from the outside (external light) is applied to the panel, the blue dielectric layer is not used for red light, which degrades the display quality of the panel, or green light, which has high visibility to human eyes. Since the light is absorbed, a decrease in contrast due to the external light can be prevented. The dielectric layer is not blue and its chromaticity coordinates are 0.05 ≦ x <0.31 and 0.05 ≦ y <
A value outside the range of 0.32 is not preferred because it causes a decrease in blue luminance due to a decrease in reflectance of blue light and a contrast due to reflection of red light and green light. Preferably, by setting the content within the following range, a PDP with a more beautiful bluish color can be obtained.
Can be created. 0.1 ≦ x ≦ 0.28 0.05 ≦ y ≦ 0.26 The dielectric layer having the above color tone can be obtained by including a blue pigment in the dielectric layer. The pigment is
In order to withstand heat during firing, it is preferable to use an inorganic pigment. Examples of the material of the blue pigment include cobalt compounds such as cobalt oxide and cobalt aluminate, vanadium,
Zirconium, aluminum, silicon, magnesium, zinc,
An oxide containing copper or the like can be used, but cobalt oxide is preferable in order to obtain a clearer blue color. It may be composed of only one kind of compound and exhibiting blue color, or may be composed of a combination of plural kinds of compounds.

In order to achieve the above-mentioned blueness, it is preferable that a blue pigment is contained in the dielectric layer in the range of 0.05 to 50% by weight. Within this range, a dielectric material that exhibits blue color and has good sinterability can be obtained.
If the content is too large, sinterability tends to decrease, voids increase, and reliability tends to decrease.

Further, other pigments may be further added. In particular, the addition of a white pigment is preferable in terms of improving white brightness,
It is preferable to add 5 to 50% by weight as a filler in the dielectric layer. By doing so, the total light reflectance on the surface of the dielectric layer becomes 50 to 90%, light leakage in the direction of the glass substrate or in the direction of the adjacent cells is suppressed, and high-luminance and high-quality display becomes possible. If the filler content is too small, the dielectric layer becomes translucent, light leakage increases, and the display quality tends to deteriorate. On the other hand, if the filler content is too large,
The sinterability of the dielectric layer is reduced, so that voids are likely to be formed, and the reliability tends to be reduced. As the filler used for the white pigment, a titanium oxide, an aluminum oxide, a zirconium oxide, a ceramic particle having a softening point of not less than 600 degrees and containing a plurality of oxides containing alumina or silica as a main component and the like, and a particle diameter of 0.05 to It is particularly preferable to use 3 μm of titanium oxide.

In order to add such a pigment to the dielectric layer,
A method of adding a pigment powder as an inorganic powder of a glass paste described later, a method of dissolving a pigment component in a glass component, and the like can be used.

The glass component of the glass paste used for the dielectric layer contains at least one of lead oxide, bismuth oxide, zinc oxide, and phosphorus oxide.
It is preferable to use a glass powder containing about 80% by weight. 10
By setting the content to be at least 80% by weight, the firing at a temperature of not more than 600 ° C. becomes easy.

The glass component is mainly composed of glass having a coefficient of thermal expansion α ₅₀ to ₄₀₀ in the range of ₅₀ to ₄₀₀ ° C. of 70 to 85 × 10 ⁻⁷ / K. It is preferable because the stress applied to the glass substrate during firing is reduced. If the coefficient of thermal expansion is too large, stress tends to be applied to the substrate on the side where the dielectric layer is formed, and if it is too small, stress tends to be applied to the side without the dielectric layer. It is in. Therefore, the substrate may be cracked when the heating and cooling of the substrate are repeated. In addition, when sealing with the front glass substrate, both substrates may not be parallel and cannot be sealed due to warpage of the substrates.

It is preferable that the glass component is a component that is inactive with respect to the electrode components. That is, it is preferable that the glass component does not substantially contain an alkali metal or an alkaline earth metal. The term "substantially free" means that 0.5% by weight or less, preferably 0.
1% by weight or less.

Since the dielectric layer is formed in contact with the electrode,
For example, when an alkali metal is present in the glass component, when silver is used for the electrode, the ion exchange reaction and the reduction reaction of silver proceed, and the silver colloid diffuses into the dielectric layer and tends to be partially colored. . Also, if alkaline earth metal is present in the glass component, an ion exchange reaction occurs with the glass component in the glass substrate or electrode during firing, even if the coefficient of thermal expansion matches the substrate glass as described above. In addition, the thermal expansion coefficient of the surface portion of the substrate glass and the dielectric layer glass component changes, the thermal expansion coefficient does not match with the substrate glass, tensile stress is generated in the substrate glass, and the substrate tends to crack.

In order to suppress the thermal deformation of the glass substrate on which the electrodes are formed, it is preferable that the firing step of the dielectric layer is performed at 400 to 600 ° C. For this reason, the inorganic component in the dielectric paste has a glass transition point of 350 to 550 ° C. and a softening point of 40 ° C.
It is preferable to use glass at 0 to 600 ° C. as a main component.
If the glass transition point or the softening point is too low, the glass will melt during the subsequent steps, and the uniformity of the thickness and the properties of the dielectric layer will tend to decrease. On the other hand, if the glass transition point or the softening point is too high, the firing on the glass substrate becomes insufficient, and the dielectric layer tends to be easily peeled off or missing.

As glass having such thermal characteristics,
Those containing 10 to 80% by weight of bismuth oxide are preferred because the glass transition point, softening point and thermal expansion coefficient are easily controlled. Also, bismuth oxide 10-8
The use of 0% by weight of glass has advantages such as improving the stability of the dielectric paste. More specifically, those containing the following composition in terms of oxides are preferable, but not limited thereto. Bismuth oxide 10 to 80% by weight Silicon oxide 3 to 50% by weight Boron oxide 10 to 40% by weight Zinc oxide 5 to 30% by weight In the same manner as described above, a dielectric layer having excellent stability can be formed. Specifically, the following composition is preferable, but the composition is not limited thereto. Lead oxide 10 to 80% by weight Silicon oxide 3 to 50% by weight Boron oxide 10 to 40% by weight Zinc oxide 5 to 30% by weight In addition, a highly reliable PDP at the time of driving is produced by containing conductive fine particles. Can be. As the conductive fine particles, metal powders such as nickel and chromium, and conductive oxide powders are preferably used.

When metal powder is used, its particle size is 1 to
10 μm is preferred. When the thickness is 1 μm or more, a sufficient effect can be exhibited, and when the thickness is 10 μm or less, irregularities on the dielectric can be suppressed and the partition wall can be easily formed. The content of these conductive fine particles in the dielectric layer is preferably 0.1 to 10% by weight. By adding 0.1% by weight or more, the effect of addition can be obtained, and 10% by weight
By setting the following, it is possible to prevent a short circuit between adjacent address electrodes. The thickness of the dielectric layer is 3 to 30 μm
It is more preferable that the thickness be 3 to 15 μm. If the dielectric layer is too thin, pinholes tend to occur, and if it is too thick, the discharge voltage tends to increase and power consumption tends to increase.

When a conductive oxide powder is used, titanium oxide powder coated on the surface with tin oxide doped with antimony is preferably used, but alumina, silica or the like may be used. The particle diameter of the inorganic powder is preferably 0.1 to 10 μm. If the particle diameter is too small, it tends to be difficult to disperse uniformly due to agglomeration of the powder. The content of the conductive oxide powder is preferably 0.1 to 30% by weight of the dielectric. When the content is 0.1% by weight or more, conductivity is exhibited, and when the content is 10% by weight or less, a short circuit between adjacent electrodes can be prevented.

As the organic binder, cellulose compounds such as ethyl cellulose and methyl cellulose, and acrylic compounds such as methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, methyl acrylate, ethyl acrylate, and isobutyl acrylate can be used. Further, additives such as a solvent and a plasticizer may be added to the glass paste. As the solvent, terpineol, butyrolactone, toluene,
A general-purpose solvent such as methylcellosolve can be used.
Further, dibutyl phthalate, diethyl phthalate, or the like can be used as the plasticizer.

Next, partition walls for partitioning the discharge cells are formed. It is effective to change the color of the partition according to the desired display characteristics, such as transparent or translucent, black transparent, opaque white, opaque black, opaque gray, and black only at the top. In the present invention, it is particularly preferable that the partition walls be blue, as in the case of the dielectric layer, or that the chromaticity coordinates be within the following ranges. 0.05 ≦ x <0.31 0.05 ≦ y <0.32 Red The partition having the above color tone can be obtained by including a blue pigment in the partition. The method of adding and the same conditions as for the dielectric layer can be adopted.

The height of the partition walls is suitably from 80 μm to 200 μm. By setting the thickness to 80 μm or more, it is possible to prevent the phosphor and the scan electrode from coming too close to each other, and to suppress the deterioration of the phosphor due to discharge. Further, by setting the thickness to 200 μm or less, it is possible to prevent the distance between the discharge at the scan electrode and the phosphor from being too large, and to obtain a sufficient luminance. The pitch (P) of the partition walls is often 100 μm ≦ P ≦ 500 μm. Further, as a high definition PDP, the pitch (P) of the partition walls is 100 μm ≦ P ≦ 250 μm. 100μ
By setting it to m or more, it is possible to prevent the discharge space from becoming narrow, and to obtain sufficient luminance. By setting it to 500 μm or less, the pixels become finer and a clear image display can be performed. 250 μm
By doing the following, a beautiful video at a high definition (HDTV) level can be displayed. When the pitch of the partition walls forming the blue phosphor layer is Pb, the pitch of the partition walls forming the red phosphor layer is Pr, and the pitch of the partition walls forming the green phosphor layer is Pg, Pb> Pr or Pb
Forming the partition wall so that b> Pg is also effective in improving the blue luminance. The line width (L) of the partition is
It is preferable that the half width is 10 μm ≦ L ≦ 50 μm. When the thickness is 10 μm or more, breakage when sealing the front plate and the back plate can be prevented. When the thickness is 50 μm or less, the formation area of the phosphor can be increased, and high luminance can be obtained.

The partition walls are generally formed by patterning a glass paste composed of inorganic fine particles and an organic binder into the shape of the partition walls and then baking the glass paste at 400 to 600 ° C. to form the partition walls.

As the inorganic fine particles, glass, ceramics (alumina, cordierite, etc.) and the like can be used. In particular, silicon oxide, boron oxide, or
Glass and ceramics containing aluminum oxide as an essential component are preferred.

Organic binders include polyvinyl alcohol, polyvinyl butyral, methacrylate polymer, acrylate polymer, acrylate-
Methacrylic acid ester copolymers, α-methylstyrene polymers, butyl methacrylate resins, and cellulose compounds such as ethyl cellulose and methyl cellulose can be used. Further, additives such as a plasticizer, a thickener, an organic solvent, an antioxidant, a dispersant, an organic or inorganic precipitation inhibitor and a leveling agent are also added.

When it is desired to adjust the viscosity of the solution, an organic solvent may be added. As the organic solvent used at this time, methyl cellosolve, ethyl cellosolve,
Butyl cellosolve, methyl ethyl ketone, dioxane,
Acetone, cyclohexanone, cyclopentanone, isobutyl alcohol, isopropyl alcohol, tetrahydrofuran, dimethyl sulfoxide, γ-butyl lactone, bromobenzene, chlorobenzene, dibromobenzene, dichlorobenzene, bromobenzoic acid, chlorobenzoic acid and the like and the like Organic solvent mixtures containing one or more are used.

When the partition walls of the PDP member of the present invention are formed by a photosensitive paste method described below, the glass paste is selected from at least one of a photosensitive monomer, a photosensitive oligomer and a photosensitive polymer. It is preferable to contain a photosensitive component, and further, if necessary, a photopolymerization initiator, a light absorber, a sensitizer, a sensitization aid, and a polymerization inhibitor.

As a method of patterning a partition using a glass paste, it can be formed by a method such as a screen printing method, a sand blast method, a photosensitive paste method, a photo embedding method, and a mold transfer method.

The screen printing method is a method in which a paste is spread on a screen plate having an emulsion layer formed on a portion other than a pattern to be formed, and is transferred onto a substrate using a squeegee. Since the transferable thickness is about 10 to 30 μm,
After the printing is repeated 5 to 15 times to secure the required height, baking is performed to form partition walls.

In the sand blast method, after a glass paste is applied on a substrate, a dry film resist is laminated thereon, the dry film resist is patterned by a photolithography method, and unnecessary parts are removed by blowing abrasive sand. How to After removing the unnecessary portions, the resist portions are removed and further baked, whereby the partition walls can be formed.

In the photo embedding method, a dry film resist is laminated on a substrate, and a pattern for removing the resist in a portion where a partition is to be formed is formed. The pattern uses a photolithography method. Next, after the glass paste is embedded in the portion where the resist has been removed, the entire resist portion is removed. To remove it,
There are a method of dissolving with alkali and a method of burning off by baking. Next, by baking, a partition can be formed.

Among the various partition wall forming methods, the photosensitive paste method is superior in terms of high definition and simplicity of the process. Next, an example of a procedure for forming a partition wall using a photosensitive paste will be described below.

A photosensitive paste is applied to a glass substrate. As a coating method, a general method such as a screen printing method, a bar coater, a roll coater, a die coater, and a blade coater can be used. The coating thickness is
It can be adjusted by selecting the number of applications, the screen mesh, and the viscosity of the paste. Alternatively, a method may be used in which a photosensitive sheet is prepared by applying a photosensitive paste on a film such as a polyester film, and the photosensitive paste is transferred onto a substrate using an apparatus such as a laminator.

After the application of the photosensitive paste, exposure is performed using an exposure device. The exposure is generally performed by a mask exposure using a photomask, as is performed by ordinary photolithography. As the mask to be used, either a negative type or a positive type is selected depending on the type of the photosensitive organic component. Alternatively, a method of directly drawing with a laser beam or the like without using a photomask may be used. The actinic rays used for the exposure include, for example, visible rays, near ultraviolet rays, ultraviolet rays, electron beams, X-rays, and laser beams. Of these, ultraviolet rays are most preferable, and as the light source, for example, a low-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a halogen lamp,
A germicidal lamp or the like can be used. Among these, an ultra-high pressure mercury lamp is preferred. Exposure conditions vary depending on the coating thickness, but exposure is performed for 0.1 to 10 minutes using an ultra-high pressure mercury lamp having an output of 1 to 100 mW / cm ² .

After exposure, development is carried out by utilizing the difference in solubility between the exposed portion and the non-exposed portion in a developing solution.

As the developing solution, a solution in which the organic component to be dissolved in the photosensitive paste can be dissolved is used. When a compound having an acidic group such as a carboxyl group is present in the photosensitive paste, it can be developed with an aqueous alkali solution. Examples of the alkaline aqueous solution include sodium hydroxide and sodium carbonate,
An aqueous solution of sodium carbonate, an aqueous solution of calcium hydroxide, or the like can be used. However, an aqueous solution of an organic alkali is preferred because an alkaline component can be easily removed during firing. As the organic alkali, a general amine compound can be used. Specific examples include tetramethylammonium hydroxide, trimethylbenzylammonium hydroxide, monoethanolamine, diethanolamine and the like. The concentration of the aqueous alkali solution is usually 0.01
10 to 10% by weight, more preferably 0.1 to 5% by weight. If the alkali concentration is too low, the soluble portion tends to be difficult to remove, and if the alkali concentration is too high, the pattern portion tends to peel off and the non-soluble portion tends to corrode. The development temperature during development is preferably from 20 to 50 ° C. from the viewpoint of process control.

Next, firing is performed in a firing furnace. The firing atmosphere and temperature vary depending on the type of paste or substrate, but firing is performed in an atmosphere such as air, nitrogen, or hydrogen. As the firing furnace, a batch type firing furnace or a roller hearth type continuous firing furnace can be used. The firing temperature is 400-8
Perform at 00 ° C. 450 to 6 when the substrate is glass
The firing is carried out at a temperature of 20 ° C. for 10 to 60 minutes.

After the partition walls are formed, a phosphor layer that emits light of each color of RGB is formed. By applying a phosphor paste containing a phosphor powder, an organic binder and an organic solvent as main components between predetermined partition walls, a phosphor layer can be formed. Examples of the method include a screen printing method of pattern printing using a screen printing plate, a dispenser method of pattern-discharging a phosphor paste from the tip of a discharge nozzle, and a photosensitive phosphor using a photosensitive organic component as an organic binder. A photosensitive paste method using a paste or the like can be employed.

The thickness of the phosphor layer of each color is 10 to 50 μm.
It is preferred that By setting the thickness to 10 μm or more, sufficient luminance can be obtained. Further, by setting the thickness to 50 μm or less, a discharge space is secured, and the phosphor can emit light effectively. In this case, the thickness of the phosphor layer is measured as a thickness formed at an intermediate point between adjacent partition walls, that is, a thickness of the phosphor layer formed at the bottom of the discharge space (in the cell).

Further, when the thickness of the R phosphor layer is Tr, the thickness of the G phosphor layer is Tg, and the thickness of the B phosphor layer is Tb, the fluorescence is set so that Tr <Tb or Tg <Tb. Forming a body layer is also effective in improving blue luminance. In other words, the thickness of the blue phosphor layer is green,
By making it thicker than red, a PDP with more excellent color balance (higher color temperature) can be produced.

Also, RGBRGBB ... and RGBBR
Forming a phosphor layer that emits blue light in two or more adjacent grooves formed by barrier ribs, such as GGBB, is also effective in improving blue luminance.

As the phosphor powder to be used, red is Y
₂ O ₃ : Eu, YVO ₄ : Eu, (Y, Gd) BO ₃ : E
_{u, Y 2 0 3 S:} Eu, γ-Zn 3 (PO 4) 2: Mn,
Green color such as (ZnCd) S: Ag + In ₂ O ₃ is Zn ₂
GeO ₂ : Mn, BaAl ₁₂ O ₁₉ : Mn, Zn ₂ Si
O ₄ , LaPO ₄ : Tb, ZnS: Cu, Al, ZnS:
Au, Cu, Al, (ZnCd) S: Cu, Al, Zn
₂ SiO ₄ : Mn, As, Y _{3 A 15} O ₁₂ : Ce, CeMg
Al ₁₁ O ₁₉ : Tb, Gd ₂ O ₂ S: Tb, Y _{3 A 15} O ₁₂ :
Tb, ZnO: Zn, etc., and the blue color is Sr ₅ (P
O ₄ ) ₃ Cl: Eu, BaMgAl ₁₄ O ₂₃ : Eu, BaM
gAl ₁₆ O ₂₇ : Eu, BaMg ₂ Al ₁₄ O ₂₄ : Eu,
(Ba, Eu) MgAl ₁₀ O ₁₇ , ZnS: Ag + red pigment, Y ₂ SiO ₃ : Ce, and the like.

If necessary, the substrate on which the phosphor layer is formed may be
By firing at 400 to 550 ° C, the PDP of the present invention
Member can be manufactured.

Using the above-mentioned PDP member as a back plate, after sealing with the front plate, filling a space formed between the front and rear substrates with a discharge gas composed of helium, neon, xenon or the like. A plasma display of the present invention can be manufactured by mounting a driving circuit. The front plate includes a transparent electrode, a bus electrode, a dielectric, and a protective film (M) in a predetermined pattern on the substrate.
gO) may be formed on the substrate, and a color filter layer may be formed on a portion corresponding to the RGB phosphor layers formed on the rear substrate. Further, a black stripe may be formed to improve the contrast.

[0055]

The present invention will be specifically described below with reference to examples. However, the present invention is not limited to this. (Measurement method) (1) Chromaticity coordinates Using a color computer of Suga Test Instruments Co., Ltd.
The reflected light of the light was measured. (2) Total light reflectance Measured by an ultraviolet-visible light spectrophotometer equipped with an integrating sphere. (3) Display characteristics of PDP Brightness measuring device MCPD-2000 manufactured by Otsuka Electronics Co., Ltd.
Was used to measure chromaticity, luminance, and color temperature. In addition,
The larger the numerical value is, the brighter the brightness is, and the color temperature is 8000 to 1
Emit vivid white light at 2000K (Kelvin), 800
It is reddish below 0K and bluish above 12000K.

(Example 1) First, a front plate was manufactured. Scan electrodes having a pitch of 375 μm and a line width of 150 μm were formed on a glass substrate PD200 manufactured by Asahi Glass Co., Ltd. using ITO. Also, after applying a photosensitive silver paste on the substrate, mask exposure through a photomask is performed.
Developing with 3% sodium carbonate aqueous solution, 580 ° C 15
After a baking process for 5 minutes, a bus electrode having a line width of 50 μm and a thickness of 3 μm was formed. Next, 70% of powder of low melting point glass containing 75% by weight of lead oxide, 2% of ethyl cellulose,
A glass paste obtained by kneading 18% of terpineol was applied by screen printing to a thickness of 50 μm so as to cover a bus electrode in a display portion, and then 570 ° C.
Baking was performed for 5 minutes to form a front dielectric. As a protective film by electron beam evaporation on the substrate on which the dielectric was formed,
A front plate was manufactured by forming a 0.5 μm thick magnesium oxide layer.

Next, a back plate was manufactured. An address electrode was formed on the PD 200 using a photosensitive silver paste. An address electrode having a line width of 50 μm, a thickness of 3 μm, and a pitch of 250 μm was formed through the steps of applying a photosensitive silver paste, drying, exposing, developing and firing.

Next, 48% of low melting glass powder containing 75% by weight of bismuth oxide, 16% by weight of titanium oxide powder having an average particle diameter of 0.3 μm, and blue pigment of cobalt oxide powder having an average particle diameter of 1 μm 1% by weight, ethyl cellulose 2
% And terpineol 23% are applied by screen printing to a thickness of 20 μm by screen printing so as to cover the address electrodes in the display area.
Firing was performed at 70 ° C. for 15 minutes to form a dielectric layer. This dielectric layer has a thickness of 10 μm, and blue has chromaticity coordinates (x,
y), (0.25, 0.25), the total light reflectance is 70%
Met.

A partition was formed on the dielectric by a photosensitive paste method. The photosensitive paste is glass powder and inorganic pigment,
The glass powder is composed of an organic component, and has a composition of 10% by weight of lithium oxide, 25% by weight of silicon oxide, 30% by weight of boron oxide, 15% by weight of zinc oxide, 5% by weight of aluminum oxide, and 15% by weight of calcium oxide. Glass powder obtained by pulverizing glass and having an average particle diameter of 2 μm was used. As the blue pigment, a cobalt oxide powder having an average particle diameter of 1 μm was used. As the organic binder, 30% by weight of an acrylic polymer containing a carboxyl group, 30% by weight of trimethylolpropane triacrylate, 10% by weight of Irgacure 369 (manufactured by Ciba Geigy) as a photopolymerization initiator, γ
An organic component consisting of 30% by weight of butyrolactone was used.
The photosensitive paste was prepared by mixing the glass powder, the inorganic pigment, and the organic component at a weight ratio of 70: 3: 27, respectively, and kneading the mixture with a roll mill. After drying the photosensitive paste using a die coater to a thickness of 180 μm, the photosensitive paste is exposed using a photomask having an opening line width of 30 μm, and then developed in a 0.5% by weight aqueous ethanolamine solution. Further, by baking at 560 ° C. for 15 minutes, a partition having a pitch of 250 μm, a line width of 30 μm, and a height of 130 μm was formed.

Next, a phosphor was applied between adjacent partition walls. (Y, Gd) BO ₃ : Eu for red and Z for green
n ₂ SiO ₄ : Mn, blue (Ba, Eu) MgAl
Using a phosphor of _{10 17,} a phosphor paste was prepared using these phosphor powders as a binder resin with ethyl cellulose as a solvent and terpineol as a solvent. The application of the phosphor is 25
It was formed by a dispenser method in which a phosphor paste was discharged from the tip of a nozzle having six holes (diameter: 130 μm). The phosphor has a thickness of 25 μm after firing on the side wall of the partition,
After firing, the film was applied to a thickness of 25 μm on the dielectric, and then fired at 500 ° C. for 10 minutes.

Further, the front substrate and the rear substrate thus manufactured are sealed.
Seal with glass, and apply Ne gas containing 5% Xe.
It sealed so that internal gas pressure might be set to 66500Pa. Further
Then, a drive circuit was mounted to produce a PDP. PDP
Apply voltage to the can electrode to light up the entire PDP,
When measuring the degree, brightness, and color temperature, the white point
Luminance measurement when chromaticity at the time of lighting is x = 0.31, y = 0.32.
The result is 250 cd / m ^TwoColor temperature is 11000K
And clear white light emission was possible.

Example 2 A PDP was prepared in the same manner as in Example 1, except that the blue pigment in the dielectric paste was 5% by weight, the titanium oxide was 12% by weight, and the blue pigment in the partition paste was 0% by weight. A member was manufactured. At this time, the chromaticity coordinates of the dielectric layer were x = 0.20 and y = 0.19. When a PDP was manufactured and lit entirely, the chromaticity at white lighting was x = 0.31, y = 0.31, and the luminance measurement result was 24.
0 cd / m ² , the color temperature was 10000 K, and clear white light emission was possible.

Example 3 A PDP was prepared in the same manner as in Example 1 except that the blue pigment in the dielectric paste was 10% by weight, the titanium oxide was 7% by weight, and the blue pigment in the partition paste was 0% by weight. A member was manufactured. At this time, the chromaticity coordinates of the dielectric layer were x = 0.15 and y = 0.14. When a PDP was manufactured and lit entirely, the chromaticity at white lighting was x = 0.31, y = 0.30, and the luminance measurement result was 24.
The color temperature was 0 cd / m ² and the color temperature was 11000 K, and clear white light emission was possible.

Example 4 A PDP was prepared in the same manner as in Example 1 except that the blue pigment in the dielectric paste was 20% by weight, the titanium oxide was 0% by weight, and the blue pigment in the partition paste was 0% by weight. A member for use was produced. At this time, the chromaticity coordinates of the dielectric layer were x = 0.12 and y = 0.10. PDP
Was manufactured and illuminated over the entire surface. The chromaticity at the time of white illumination was x = 0.30, y = 0.30, and the luminance measurement result was 2
The color temperature was 40 cd / m ² , the color temperature was 11,000 K, and clear white light emission was possible.

[0065]

EFFECTS OF THE INVENTION The PDP substrate of the present invention, which has a high blue light reflectance and a blue dielectric layer, and a PDP using the PDP substrate can improve emission luminance, particularly blue luminance, and improve white light emission. Can provide a color plasma display panel having excellent color characteristics.

Claims (6)

[Claims] 1. A member for a plasma display comprising a substrate, on which an electrode, a dielectric layer, a partition for partitioning a discharge space, and a phosphor layer emitting red, green, and blue light are formed. A member for a plasma display, wherein the layer is blue. 2. A plasma display member comprising a substrate, on which an electrode, a dielectric layer, a partition for partitioning a discharge space, and a phosphor layer emitting red, green, and blue light are formed. A member for a plasma display, wherein the chromaticity coordinates (x, y) of the layer are in the following range. 0.05 ≦ x <0.31 0.05 ≦ y <0.32 3. A member for a plasma display comprising a substrate, on which an electrode, a dielectric layer, a partition for partitioning a discharge space, and a phosphor layer emitting red, green, and blue light are formed. A member for a plasma display, wherein a blue pigment is contained in a layer. 4. The method according to claim 1, wherein the dielectric layer comprises a blue pigment in an amount of 0.05 to 30.
The member for a plasma display according to claim 3, wherein the component is contained by weight%. 5. The member for a plasma display according to claim 1, wherein the partition wall is blue. 6. A plasma display using the member for a plasma display according to claim 1 as a back plate.