JP2001155641A - Gas discharge display panel and method of fabricating the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas discharge display panel with high luminance while having high luminance directivity when viewed from the outside of a panel. SOLUTION: To fabricate a gas discharge display panel 1 comprising a plurality of spacers 4 arranged between a front panel 2 and a back plate 3 arranged in parallel with a given gap between them and a phosphor layer 13, wherein the phosphor layer 13 is coated on the wall surface of the back plate 3 and the spacers 4 inside a display cell 5 surrounded by the spacers 4 and meets the requirements of d/w=0.8-2.0 and a/w=0.02-0.5 where the surface shape of a cross section is elliptically curved line, the center 15 of the elliptically curved line is positioned on the side of the front plate 2 outside the cell 5, the distance between the front plate 2 of the display cell 5 and the bottom of a phosphor layer 13 designates d, the distance between the center 15 of the elliptically curved line and display cell 5 designates a, and the distance between opening edges of the phosphor layer 13 designates w.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a gas discharge type display panel for forming an image by light emission and a method of manufacturing the same.

[0002]

2. Description of the Related Art Hitherto, a structure as shown in FIG. 3 disclosed in Japanese Patent Application Laid-Open No. 10-223135 has been known as a gas discharge type display panel. According to FIG. 3, a plurality of spacers 33, 33 are disposed between two front plates 31 and rear plates 32 disposed in parallel.
A display cell 34 is formed by 2 and the adjacent spacers 33, 33, and a discharge gas is sealed in the display cell 34. A discharge electrode 35 and an address electrode 36 are provided on the surface of the front plate 31 and the surface of the back plate 32 in the display cell 34, respectively.

Further, on the surface of the back plate 32 and the wall surface of the spacer 33 in the display cell 34, a phosphor layer 37 having a surface shape with a substantially flat cross section is formed. And
A voltage is applied to the discharge electrode 35 to cause the discharge gas in the display cell 34 to emit ultraviolet light, thereby causing the surface of the phosphor 37 to emit light.

However, in the above configuration, the distance from the ultraviolet emission center 38 of the discharge gas to the surface of the phosphor layer 37 varies depending on the direction, and the intensity of ultraviolet irradiation becomes non-uniform. There is a problem that the intensity distribution becomes non-uniform depending on the position and the direction.

Therefore, in Japanese Patent Application Laid-Open No. Hei 10-223135, the cross section of the phosphor layer surface is formed in an arc shape as shown in FIG. 4 so that the fluorescence emission intensity distribution on the surface of the phosphor layer 47 can be made uniform. It has been disclosed.

[0006]

However, in the surface shape of the phosphor layer 47 shown in FIG. 4, since the ultraviolet light emission center 48 of the discharge gas is located inside the end face of the display cell 44 on the front plate 41 side, the fluorescent layer 47 has the same structure. From the surface of the body layer 47 to the display cell 4
In the case where the distances to the center of the end face on the front plate 41 side of the front plate 41 are equal to each other, the ultraviolet light emission center 4
There is a problem that the distance to 8 is not uniform and the emission intensity of the phosphor layer 47 is not uniform. Conversely, if the distance from the surface of the phosphor layer 47 to the center of ultraviolet light emission 48 of the discharge gas is equal, the fluorescence emission intensity distribution can be made uniform,
There is a problem that the end of the spacer on the side of the bonding surface of the front plate becomes a barrier to light emission, and the viewing angle cannot be widened.

Further, as the pixel density increases, the display cells 4
The shape of 4 tends to be a rectangular shape in which the length of the spacer 43 is longer than the lengths of the front plate and the back plate. If the surface shape of the phosphor layer is arc-shaped, the surface area of the phosphor layer is narrow and the emission height is improved. There was a problem that can not be.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to improve the surface shape of a phosphor layer so that the directional characteristics of fluorescent light emitted to the outside of the panel become uniform and the light emission is improved. It is an object of the present invention to provide a gas discharge type display panel capable of increasing strength and a method for manufacturing the same.

[0009]

The inventor of the present invention has made it possible to make the emission intensity of the phosphor layer substantially uniform by making the surface shape in the cross section of the phosphor layer a predetermined elliptical shape. It has been found that the observed luminance can be made uniform regardless of the position and a wide viewing angle can be secured.

That is, in the gas discharge type display panel of the present invention, a plurality of spacers are disposed between a front plate and a back plate which are formed in parallel at a predetermined distance from each other, and a plurality of spacers are provided between the front plate and the back plate. A phosphor layer is formed on the wall surface of the rear plate and the wall surface of the spacer in a display cell surrounded by two adjacent spacers among the spacers, and discharge is performed by a pair of discharge electrodes formed on the front plate. In the gas discharge display panel that emits light from the phosphor layer, a surface of the phosphor layer in a cross section is formed of an elliptic curve, and a center of the elliptic curve is located on the front plate side outside the display cell. When the distance from the front panel of the display cell to the deepest portion of the phosphor layer is d, the distance from the center of the elliptic curve to the display cell is a, and the distance between the open ends of the phosphor layer is w. D / w = 0.8-2 0.0 a / w = 0.02 to 0.5.

In the method of manufacturing a gas discharge display panel according to the present invention, a first coating layer for forming a spacer is formed on the surface of the back plate, and then a phosphor layer is formed on the surface of the first coating layer. After forming a second coating layer for use, the first and second coating layers are plastically deformed by pressing a mold having a convex portion from the second coating layer surface side, and the spacers and the fluorescent light are pressed. After the body layers are simultaneously molded, the molded bodies are heated and fired, and then a front plate is adhered to the distal end face of the spacer, wherein the cross section of the convex portion in the mold has an elliptic curve, and the elliptic curve The center of the convex portion is outside the convex portion, d is the height of the convex portion, a is the distance from the center of the elliptic curve to the base surface of the convex portion, and w is the width of the convex portion on the base surface of the convex portion. Satisfies the relationship d / w = 0.8-2.0 a / w = 0.02-0.5 The one in which the features.

Further, in another method of manufacturing a gas discharge type display panel according to the present invention, a first coating layer for forming a spacer is formed on a surface of a back plate, and the surface of the first coating layer is After pressing the convex portion of the first mold having the convex portion to plastically deform the first coating layer and forming a spacer by heating and firing, the phosphor layer is formed on the surface of the first coating layer. Forming a second coating layer, pressing the convex portion of the second mold having a convex portion from the second coating layer surface side, plastically deforming the second coating layer, and heating and firing; Then, a front plate is adhered to the distal end face of the spacer, wherein the second mold has a cross section of a convex portion formed of an elliptic curve, and the center of the elliptic curve is outside the convex portion, The height of the protrusion is d, the distance from the center of the elliptic curve to the base of the protrusion is a, and the width of the protrusion on the base of the protrusion is w. When, is characterized in that it has a convex portion that satisfies the relationship of d / w = 0.8~2.0 a / w = 0.02~0.5.

[0013]

In the gas discharge type display panel of the present invention, even if the center of the end surface of the display cell does not coincide with the center of ultraviolet light emission of the discharge gas, and the distance between the two and the surface of the phosphor layer are not uniform, a predetermined elliptical shape is obtained. By doing so, the emission intensity of the phosphor layer observed outside the panel can be made substantially uniform.

Further, since the surface shape of the phosphor layer is elliptical, even near the open end of the phosphor layer, the surface is not perpendicular to the front plate but slightly tilts toward the front plate. In addition, the viewing angle can be made wider than when the surface shape of the phosphor layer is an arc.

Further, since the surface shape of the phosphor layer is elliptical, even if the display cell has a rectangular shape longer on the spacer side than the front plate and the back plate side, the surface shape of the phosphor layer is not changed. The surface area of the phosphor layer contributing to light emission can be increased as compared with the case of an arc.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas discharge type display panel according to the present invention will be described with reference to FIG. 1 which is a schematic sectional view of a plasma display panel as an example. According to FIG.
In the plasma display panel 1, a plurality of spacers 4, 4 are disposed in parallel between a front plate 2 and a back plate 3 formed in parallel with a predetermined distance therebetween. A display cell 5 surrounded by the back plate 3 and two adjacent spacers 4 is formed. Then, a discharge gas is sealed in the display cell 5.

The front plate 2 includes a front substrate 6 and a pair of discharge electrodes 7 disposed on the display cell 5 side surface of the front substrate 6.
And, if desired, on the surface of the discharge electrode 7,
Desirably, dielectrics 8 each having a thickness of 10 to 30 μm are formed to protect the electrodes.
It is desirable that an electrode protection layer 9 made of an MgO film or the like having a thickness of 0.1 to 5 μm is formed on the surface so as to improve plasma resistance and a secondary electron emission coefficient.

On the other hand, the back plate 3 includes a back substrate 10 and address electrodes 11 disposed on the surface of the back substrate 10 on the display cell 5 side, and further includes a dielectric 12 for protecting the address electrodes 11. It is desirable to be installed.

The front substrate 6 and the rear substrate 10 have a thickness of 2
It is desirable to use 3.5 mm soda lime glass, low soda glass, lead silicate glass, borosilicate glass, or other such glass, and it is particularly desirable to use low soda glass containing little sodium and lead.

The spacer 4 is made of, for example, glass having a lower strain point than the front substrate 6 and the rear substrate 10 such as lead glass, alkali silicate glass, and bismuth-based glass. SiO ₂ , ZrO ₂ , Al ₂ O ₃ , Ti
At least one filler component such as O ₂ , Si ₃ N ₄ , Fe ₂ O ₃ , NiO, CuO, and MnO can be added.

The shape of the spacer 4 is, for example, a width 5
It is a rib having a length of about 0 to 150 μm and a height of about 120 to 170 μm, and is formed in a stripe shape having a pitch of 140 to 600 μm. According to the present invention,
In order to suppress the deformation of the spacer 4 due to firing and to improve the strength of the spacer 4, the trapezoid or the phosphor is preferably used so that the thickness of the spacer 4 at the bonding surface of the back plate 3 is larger than the thickness at the bonding surface of the front plate 2. The shape may be similar to the surface shape of the layer 13.

Further, in the display cell 5, He, Ne,
About 3 × 10 ^{4 to} 7 × 10 ⁴ Pa of discharge gas such as Xe is sealed.

The discharge electrode 7 is a line-shaped electrode,
The address electrode 11 is formed of a transparent material such as an alloy oxide of indium and tin (ITO) or tin oxide (SnO ₂ ).
20 μm linear electrode, Ni, Ag, Al,
It is made of a conductor layer containing Cr or Cu as a main component.

Further, a phosphor layer 13 is applied from the wall surface of the spacer 4 in the display cell 5 to the surface of the back plate 2. The phosphor layer 13 is made of, for example, (Y, Gd) BO ₃ : E
u, Zn ₂ SiO ₄ : Mn, BaMgAl ₁₀ O ₁₇ : Eu ²⁺
And emits visible light having a specific wavelength such as R (red), G (green), or B (blue) when excited by ultraviolet rays generated by discharge.

According to the present invention, the surface shape in the cross section of the phosphor layer 13 is an elliptic curve, and the center 15 of the elliptic curve is outside the end face of the display cell 5, and the display cell 5
D is the distance from the front plate 2 to the deepest part of the phosphor layer 13;
When the distance from the center 15 of the elliptic curve to the display cell 5 is a and the distance between the open ends of the phosphor layer 13 is w, d / w = 0.
It is a great feature that 8 to 2.0 and a / w = 0.02 to 0.5 are satisfied.

Here, when d / w <0.8, the phosphor layer 1
Since the distance from the bottom surface of Sample No. 3 to the ultraviolet light emission center 14 of the discharge gas is too short, there is a problem that the phosphor layer 13 is significantly deteriorated by the discharge and the durability is deteriorated, and d / w> 2.0.
In this case, since the distance from the bottom surface of the phosphor layer 13 to the ultraviolet light emission center 14 of the discharge gas is too long, the light emission from the bottom portion of the phosphor layer 13 is too small, and the panel luminance when viewed from the front of the panel is not good. This is sufficient and the viewing angle becomes narrow.

When a / w <0.02, the edge of the front plate of the spacer acts as a barrier to light emission, and the viewing angle becomes narrower. This is because the difference in distance between the surface of the back plate and the phosphor layer on the spacer wall surface is large, and the emission intensity from the phosphor layer becomes non-uniform depending on the orientation.

The major axis of the ellipse is (a + d) and the minor axis is w (a + d) / (2d (2a + d)).

That is, if the d, a, and w values are within the above-mentioned predetermined ranges, the directivity of the panel can be made substantially uniform, and a wide viewing angle can be secured.

Next, a method of manufacturing the gas discharge type display panel of the present invention will be described with reference to the process chart of FIG. First, the back plate 3 is manufactured by forming the address electrodes 11 on the surface of the back substrate 10 by a screen printing method, a photoresist method, an additive method or the like, and forming the dielectric layer 12 by a screen printing method or the like. Note that the dielectric 12 may be formed simultaneously with the formation of the spacers 4 using the same material as the spacers 4 described later.

Next, the first coating layer 21 for forming the spacer 4 is formed on the surface of the dielectric 12 by using a paste for the spacer 4 by a roll coater method, a doctor blade method, a screen printing method, a photoresist method, an additive method or the like. And then forming a phosphor layer 13 on the surface of the first coating layer 21 using a paste for the phosphor layer 13 by a roll coater method, a doctor blade method, a screen printing method, a photoresist method, an additive method, or the like. Second coating layer 2
2 is formed with a predetermined thickness.

Here, the paste for the spacer 4 is as follows.
Acrylic-based, butyral-based thermoplastic binder or UV-curable resin or photo-curable resin, binder composed of reaction-curable resin such as thermosetting resin, etc. In terms of the acrylic, butyral-based binder, a curing agent, a substance to which an organic substance such as a solvent is added can be suitably used, and as the paste for the phosphor layer 13, for the phosphor powder as described above, A glassy material which becomes vitreous after firing and to which an organic substance such as a glass powder, a binder, a solvent or the like which binds the phosphor powder can be suitably used.

The first coating layer 21 is desirably applied to the entire surface of the back plate 3, and the second coating layer 22 is applied to the entire surface of the back plate 3 or in a desired pattern. In addition, the coating height of the phosphor layer 13 with respect to the spacer 4 in the display cell 5 can be changed according to the pattern of the second coating layer.

Then, if desired, the first coating layer 21 and the second coating layer 22 are dried until the desired viscosity is reached, and then the above-mentioned elliptical tip is formed on the surface of the second coating layer 22. The first coating layer 21 and the second coating layer 22 are plastically deformed by being pressed by a molding die 24 having a convex portion 23, and the molded product 25 for the spacer 4 and the molded product 2 for the phosphor layer 2 are formed.
6 is produced.

The molding die 24 may be made of metal, resin or rubber. Further, a composite molding die using a resin or rubber member only on the surface of a metal base material may be used. It is possible, and the surface of the mold may be subjected to a surface treatment or the like in order to improve releasability and abrasion resistance.

Further, the forming die 24 is a roll-shaped forming die,
The plastic may be plastically deformed by being pressed against the surface of the second coating layer 22 while being rotated. According to this, the mold releasability of the molding die 24 can be improved and the molding can be continuously performed on a large number of substrates. be able to.

Then, the back plate 3 on which the obtained spacer molded body 25 and phosphor layer molded body 26 are adhered and formed is heated to a predetermined temperature, for example, 550 to 600 ° C. to remove the binder, and then fired. And can be integrated with the back plate 3.

It is sufficient that the first coating layer of the composition for forming a spacer and the second coating layer of the composition for forming a phosphor layer finally have plastic deformability. It is also possible to form a coating layer with the composition itself having the above, or to impart plastic deformation to the coating layer after forming each of the coating layers.

On the other hand, at least one pair of discharge electrodes 7 is formed on the surface of the front substrate 6 by a thin film forming method such as a sputtering method, a photoresist method, a screen printing method, a lift-off method, an additive method or the like. After forming the insulator 8 by a screen printing method, a laminating method, or the like,
An electrode protection layer 9 such as an MgO film is formed by a known thin film forming method such as a vapor deposition method to manufacture the front plate 2.

Further, the spacer 4 and the address electrode 1
Front plate 2 and back plate 3 so that 1 and discharge electrode 7 are orthogonal to each other.
Are sealed by heating with a glass frit or the like interposed therebetween, and after evacuation to about 10 ^-4 Pa, discharge gas containing Xe, He-Xe, He-Xe, etc. as a main component is discharged. A plasma display panel can be manufactured by enclosing about 3 × 10 ^{4 to} 7 × 10 ⁵ Pa.

In the method of manufacturing the plasma display panel 1 shown in FIG. 2, the first coating layer and the second coating layer are simultaneously plastically deformed. However, the present invention is not limited to this. Alternatively, after forming the spacer by firing the spacer molded body, the phosphor layer may be formed by applying, molding, and firing.

Specifically, a first coating layer is applied and formed,
Pressing the convex part of the first mold having the convex part from the surface,
A spacer molded body is produced by plastic deformation by release from the mold, which is then heated and fired. Then, a mask is formed on a U-shaped portion surrounded by the adjacent spacer and the back plate 3 using a mask, and a known method such as screen printing is used. A predetermined amount of the phosphor paste is poured by the method described above to form a second coating layer, and the above-mentioned tip is pressed and released from the surface by the convex portion of the second mold having the convex portion having a predetermined elliptical shape. Then, the surface of the phosphor layer 13 can be plastically deformed to have the above-mentioned elliptical shape, and then heated and fired to produce the phosphor layer.

In this case, the surface shape of the spacer and the surface shape of the phosphor layer can be easily changed by changing the shape of the projections of the first mold and the second mold.

[0044]

(Embodiment 1) An image display area of 4 mm in thickness 2 mm
An address electrode pattern was formed by screen printing using a silver paste on a glass substrate made of soda lime glass for a 0-inch size, and baked at 580 ° C.

On the other hand, the strain point was 450 ° C. and the average particle size was 0.5 μm.
For the low melting glass powder of, as a filler, titania, alumina, fused silica, α- terpineol,
Polyvinyl butyral and a solvent such as a dispersant and alcohol were added and kneaded to prepare a paste for a spacer, and the paste was formed into a layer on the electrode surface by a slit coater to form a first coating layer.

Further, a phosphor paste containing a phosphor and a cellulosic organic binder was applied to the surface of the spacer paste by a screen printing method to form a second coating layer.

The phosphor layer forming composition is prepared in three types for three primary colors (RGB) for color light emission, and the pitch 220 is set so as to be adjacent to each other in parallel in a stripe shape.
It was formed to a thickness of 180 μm and a thickness of 20 μm. Then, the mold was pressed by a molding die having a convex portion having an elliptical tip shown in Table 1, and the mold was released. At the same time, a dielectric was also formed on the electrode surface.

When this was fired at 570 ° C. in the air, the width of the tip was 50 μm and the height was 150 μm on the back plate surface.
m, a spacer having a pitch of 220 μm and an elliptical wall surface was obtained.

Then, the binder was removed by heating while flowing air, and the spacer and the phosphor were baked by heating to 500 ° C. When measured using a laser displacement meter, the average thickness of the phosphor on the partition wall surface was 8 μm.

Then, the rear plate and the front plate are glass-flipped.
1.3 × 10 ^-FourPumping down to Pa
After that, a discharge gas containing Ne-Xe as a main component was added to 3.25.
× 10^Five~ 4.0 × 10^FiveAir-tightly sealed with Pa
A display panel was prepared.

The obtained plasma display panel was caused to emit light, and the vertical distance to the panel surface was set to 2 m using a light meter.
When the light meter was moved in parallel with the panel surface while maintaining the above, the luminance was measured at the center of the panel, 2 m from the center, and 4 m away from the center, and the results are shown in Table 1. When the luminance at the center of the panel is 100%, the luminance is 2% from the center.
The rate of change in luminance from the center of the panel at a distance of m and 4 m is shown.

When the plasma display panel was cut in a direction perpendicular to the spacer and observed by SEM, it was confirmed that the surface shape of the phosphor layer was the same as the elliptical shape at the tip of the convex part of the mold.

Comparative Example 1 A phosphor layer was formed by a screen printing method after forming a spacer, and a phosphor layer having a substantially flat surface shape on the back plate was formed. A plasma display panel was manufactured and evaluated in the same manner as in the examples. (Sample No. 9). The results are shown in Table 1. When the surface shape of the phosphor layer was confirmed in the same manner as in the example, it was confirmed that the shape of the phosphor layer at the center of the display cell on the surface of the back plate was substantially flat.

(Comparative Example 2) A plasma display panel was prepared and evaluated in the same manner as in the example except that the tip of the mold had a hemispherical shape with a curvature radius of 80 µm. (Sample No. 10). The results are shown in Table 1.

[0055]

[Table 1]

As is clear from Table 1, the sample No. 1 in which the surface shape of the back plate surface is a substantially flat phosphor layer was obtained. Sample No. 9 and Sample No. 9 in which the surface shapes of the back plate surfaces are hemispherical. In No. 10, the variation in luminance between the front and the oblique position of the panel was large.

The sample No. with a / w = 0. 6, a
Sample No./w is larger than 0.5. 8, d / w is 0.8
Sample No. smaller than 1. Sample N with d / w greater than 2
o. In No. 5, the rate of change in luminance was large.

On the other hand, the sample No. 1 in which the surface of the phosphor layer within the scope of the present invention has a predetermined elliptical shape was used. Two
In Nos. 4 and 7, the light amount from the center of the panel was within ± 10% within a range of 4 m from the front of the panel, and it was confirmed that directivity of luminance with small variation was obtained.

[0059]

As described above in detail, according to the gas discharge type display panel of the present invention, the directivity of the fluorescent light emitted to the outside of the panel is made uniform, the viewing angle is extremely wide, and a large screen is obtained. Thus, an image display device having a uniform luminance distribution over the entire screen can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a plasma display panel which is an example of a gas discharge type display panel of the present invention.

FIG. 2 is a process chart for explaining a method for manufacturing a gas discharge type display panel of the present invention.

FIG. 3 is a schematic sectional view of a plasma display panel which is an example of a conventional gas discharge type display panel.

FIG. 4 is a schematic sectional view of another plasma display panel which is an example of a conventional gas discharge type display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plasma display panel 2 Front plate 3 Back plate 4 Spacer 5 Display cell 6 Front substrate 7 Discharge electrode 8, 12 Dielectric 9 Electrode protection layer 10 Back substrate 11 Address electrode 13 Phosphor layer 14 Ultraviolet light emission center 15 Surface of phosphor layer Center of elliptic curve as shape 21 First coating layer 22 Second coating layer 23 Convex part 24 Mold 25 Molded body for spacer 26 Molded body for phosphor layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01J 11/02 H01J 11/02 BF term (Reference) 5C027 AA09 5C028 FF06 FF08 FF14 5C040 FA01 FA04 GB03 GB14 GF02 GF11 GF19 GG01 GG03 GG04 GG05 GG09 JA12 JA20 JA22 KB04 KB19 MA03 MA06 5C094 AA03 AA10 AA12 AA43 AA48 AA55 BA31 CA19 DB04 EA04 EB02 EC03 EC04 FA01 FA02 FB02 FB15 GB10 JA01

Claims (3)

[Claims] A plurality of spacers are disposed between a front plate and a rear plate formed in parallel at a predetermined distance from each other, and two adjacent spacers among the front plate, the rear plate, and the spacer are provided. A phosphor layer is formed on the back plate wall surface and the spacer wall surface in the display cell surrounded by a circle, and a gas is emitted from the pair of discharge electrodes formed on the front plate to cause the phosphor layer to emit light. In the discharge type display panel, a surface of the phosphor layer in a cross section is formed of an elliptic curve, and a center of the elliptic curve is located on the front plate side outside the display cell, and the display cell is formed from the front plate. When the distance from the center of the elliptic curve to the display cell is a, and the distance between the open ends of the phosphor layer is w, d / w = 0.8 to 2 0.0 a / w = 0.02-0.5 A gas discharge display panel characterized in that: 2. After forming a first coating layer for forming a spacer on the surface of the back plate, and then forming a second coating layer for forming a phosphor layer on the surface of the first coating layer. After pressing the mold having convex portions from the second coating layer surface side to plastically deform the first and second coating layers and simultaneously forming the spacer and the phosphor layer, the molded articles are heated. Baking, and then a method of manufacturing a gas discharge type display panel in which a front plate is adhered to a tip surface of a spacer, wherein a cross section of a convex portion of the molding die has an elliptic curve, and a center of the elliptic curve is outside the convex portion. When the height of the protrusion is d, the distance from the center of the elliptic curve to the base of the protrusion is a, and the width of the protrusion on the base of the protrusion is w, d / w = 0. Gas discharge characterized by satisfying a relationship of 0.8 to 2.0 a / w = 0.02 to 0.5 Method of manufacturing a display panel. 3. A first coating layer for forming a spacer is formed on the surface of the back plate, and a convex portion of a first mold having a convex portion is pressed against the surface of the first coating layer. After the first coating layer is plastically deformed and heated and fired to form a spacer, a second coating layer for forming a phosphor layer is formed on the surface of the first coating layer, and the second coating layer is formed. A gas discharge type display panel in which the convex portion of the second mold having the convex portion is pressed from the surface side of the coating layer, the second coating layer is plastically deformed and baked by heating, and then the front plate is bonded to the distal end surface of the spacer. In the manufacturing method of the above, the second molding die is such that the cross section of the convex portion is formed of an elliptic curve, and the center of the elliptic curve is outside the convex portion, and the height of the convex portion is d, When the distance from the center of the curve to the base of the protrusion is a, and the width of the protrusion on the base of the protrusion is w, d / w = 0.8 to A method for manufacturing a gas discharge type display panel, comprising a convex portion satisfying a relationship of 2.0 a / w = 0.02 to 0.5.