JP2010277803A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display panel displaying a high-quality image with less variations in discharge characteristics and color unevenness of each discharge cell. <P>SOLUTION: The plasma display panel is formed of a front substrate having a plurality of display electrode pairs each of which forms a discharge gap between a pair of a scanning electrode and a sustaining electrode, and a rear substrate having barrier ribs and a phosphor formed between the adjacent barrier ribs. The scanning electrode and sustaining electrode for forming the display electrode pair are formed in a ladder shape by a plurality of electrodes in a longitudinal direction and a bridge electrode connecting them. A transparent electrode formed by coating and firing a dispersion liquid containing fine particles of metal or metal oxide is formed in a clearance of the ladder shaped electrodes. A position with the bridge electrode formed corresponds to a position with the phosphor formed. A color of the phosphor in the position with the bridge electrode formed is different from a color of the phosphor in the position with an adjacent bridge electrode formed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an AC surface discharge type plasma display panel used for a display device or the like.

  A typical AC surface discharge type panel as a plasma display panel (hereinafter simply abbreviated as “panel”) has a large number of discharge cells between a front plate and a back plate arranged to face each other. The front plate includes a front substrate made of glass, a display electrode pair including a pair of scan electrodes and sustain electrodes, and a dielectric layer and a protective layer covering them. The back plate includes a glass back substrate, data electrodes, a dielectric layer covering the data electrodes, barrier ribs, and a phosphor layer. Then, the front plate and the rear plate are arranged opposite to each other so that the display electrode pair and the data electrode are three-dimensionally crossed and sealed, and a discharge gas is sealed in the internal discharge space. Here, a discharge cell partitioned by a barrier rib is formed at a portion where the display electrode pair and the data electrode face each other. A gas discharge is generated in each discharge cell of the panel configured as described above, and red, green, and blue phosphors are excited and emitted to perform color display.

  Each of the scan electrode and the sustain electrode is formed by, for example, laminating a narrow striped bus electrode on a wide striped transparent electrode. The transparent electrode is formed by, for example, patterning an ITO thin film formed on the front substrate using a sputtering method or the like into a stripe shape using a photolithographic method or the like. The bus electrode is formed by printing and baking a silver paste on a transparent electrode in a stripe shape (see, for example, Patent Document 1). However, in order to form an ITO thin film by sputtering or the like, equipment such as a vacuum apparatus and an exposure machine is required, and not only the production equipment becomes large, but also the productivity is low.

  In order to solve these problems, a method of forming a transparent electrode by applying and baking a dispersion containing fine particles of a metal selected from indium, tin, antimony, aluminum and zinc is disclosed (for example, , See Patent Document 2).

  Further, as another method for solving these problems, a method of forming a transparent electrode by applying and baking a dispersion containing fine oxide particles of a metal selected from indium, tin and zinc is also disclosed. (For example, refer to Patent Document 3).

  There has also been proposed a method in which the electrodes on the front substrate are discharged by forming a ladder pattern with only metal electrodes without forming transparent electrodes.

JP 2000-156168 A JP 2005-183054 A JP 2005-166350 A

  However, in the method of applying a dispersion for forming a transparent electrode, the thick film printing method has a limit in printing accuracy, and it is difficult to form a transparent electrode with high accuracy. Realizing shape linearity is difficult. In particular, the distance between the scan electrode and the sustain electrode inside the discharge cell, that is, the distance of the discharge gap greatly affects the discharge characteristics of the discharge cell. Therefore, if the printing accuracy of the transparent electrode is poor and the variation in the distance of the discharge gap is large, the variation in the discharge characteristics for each discharge cell is increased, causing a problem that the display screen is uneven and the image display quality is deteriorated.

  In addition, in a method in which a ladder pattern is formed only with metal electrodes and a transparent electrode is not used, the linearity of the electrode edge and the pattern accuracy can be realized relatively well, but the light shielding area by the electrode in order to obtain a good discharge. Therefore, there is a problem that the display luminance is lowered and the light emission efficiency of the panel is lowered.

  On the other hand, when the number of bridge electrodes forming the ladder shape of the metal electrode is increased, light emission by the phosphor on the back plate side is shielded, which causes color unevenness depending on each color of the shielded phosphor. It was.

  The present invention has been made in view of the above problems, and has a transparent electrode formed by applying and firing a dispersion containing fine metal particles or fine metal oxide particles, and achieves both interelectrode discharge characteristics and display luminance characteristics. An object of the present invention is to provide a panel that maintains display quality without color unevenness.

  To achieve the above object, the present invention provides a front substrate having a plurality of display electrode pairs in which a discharge gap is formed between a pair of scan electrodes and sustain electrodes, and a phosphor between the barrier ribs adjacent to the barrier ribs. A plasma display panel formed with a formed rear substrate, wherein the scan electrode has a scan bus electrode and a scan transparent electrode, the sustain electrode has a sustain bus electrode and a sustain transparent electrode, and the scan The bus electrodes and the sustain bus electrodes are respectively formed on the front substrate so as to form the discharge gap, and the scan electrodes and the sustain electrodes constituting the pair of display electrodes have a plurality of longitudinal directions. A ladder electrode is formed by an electrode and a bridge electrode connecting them, and a transparent electrode is formed in the gap between the ladder electrodes by applying and baking a dispersion liquid containing metal or metal oxide fine particles. The position where the bridge electrode is formed corresponds to the position where the phosphor is formed, and the color of the phosphor at the position where the bridge electrode is formed is formed by the adjacent bridge electrode. It differs from the color of the said fluorescent substance of the position currently made. With this configuration, a transparent electrode having a transparent electrode formed by firing a dispersion containing fine metal particles or fine metal oxide particles has little variation in discharge characteristics and color unevenness among discharge cells, and a bright image with high display quality. Can be provided.

  Further, a part of each of the bridge electrodes may be formed at a position corresponding to a position where the partition wall is formed. The dispersion may be applied by an ink jet method. According to the ink jet printing method, since the dispersion liquid is applied only to a necessary portion, there is an advantage that there is no waste of material and that even a complicated pattern can be easily handled.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the panel which displays the image with little variation in the discharge characteristic for every discharge cell, and uneven color, and a bright image with high quality.

The disassembled perspective view which shows the structure of the panel in embodiment of this invention The figure which shows the detail of the display electrode pair of the panel The figure for demonstrating the example of the manufacturing method of the front plate of the panel of embodiment of this invention. The figure for demonstrating the example of the manufacturing method of the backplate of the panel of embodiment of this invention. The figure for demonstrating another example of the manufacturing method of the front plate of the panel of embodiment of this invention

  Hereinafter, a panel according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view showing the structure of the panel in the embodiment of the present invention. The panel 10 is configured by disposing the front plate 20 and the back plate 30 so as to face each other and sealing the periphery using a sealing member (not shown), and a large number of discharge cells are formed therein. ing.

  The front plate 20 includes a front substrate 21 made of glass, a display electrode pair 24 including a scan electrode 22 and a sustain electrode 23, a black stripe 25, a dielectric layer 26, and a protective layer 27. A plurality of display electrode pairs 24 including a pair of scanning electrodes 22 and sustain electrodes 23 are formed on the front substrate 21 in parallel with each other. A black stripe 25 is formed between adjacent display electrode pairs 24. In FIG. 1, the display electrode pair 24 and the black stripe 25 are formed so as to be the scan electrode 22, the sustain electrode 23, the black stripe 25, the scan electrode 22, the sustain electrode 23, the black stripe 25,. The figure is shown. However, the display electrode pair 24 and the black stripe 25 are composed of the scan electrode 22, the sustain electrode 23, the black stripe 25, the sustain electrode 23, the scan electrode 22, the black stripe 25, the scan electrode 22, the sustain electrode 23, the black stripe 25, and the sustain electrode. 23, the scanning electrode 22, the black stripe 25, and so on.

  A dielectric layer 26 is formed so as to cover the display electrode pair 24 and the black stripe 25, and a protective layer 27 is formed on the dielectric layer 26.

  The back plate 30 includes a glass back substrate 31, a data electrode 32, a base dielectric layer 33, a partition wall 34, and a phosphor layer 35. On the back substrate 31, a plurality of data electrodes 32 are formed in parallel to each other. Then, a base dielectric layer 33 is formed so as to cover the data electrode 32, and a grid-like partition wall 34 is formed thereon, and red, green, and blue colors are formed on the surface of the base dielectric layer 33 and the side surfaces of the partition wall 34. The phosphor layer 35 is formed.

  The front plate 20 and the back plate 30 are arranged to face each other so that the display electrode pair 24 and the data electrode 32 are three-dimensionally crossed, and a discharge cell is formed at a portion where the display electrode pair 24 and the data electrode 32 face each other. . The front plate 20 and the back plate 30 are sealed using low-melting glass at a position outside the image display area where the discharge cells are formed, and a discharge gas is sealed in the internal discharge space.

  FIG. 2 is a diagram showing details of the display electrode pair 24 of the panel 10 according to the embodiment of the present invention. FIG. 2A is a front view of the panel 10 viewed from the front plate 20 side, and FIG. FIG. 3 is a cross-sectional view of the front plate 20.

  The scanning electrode 22 has two scanning bus electrodes 221a and 222a made of opaque metal and 223a that connects the two electrodes as a bridge, and a transparent scanning transparent electrode 22b. The sustain electrode 23 also includes two sustain bus electrodes 231a and 232a and a sustain transparent electrode 23b that connects the two electrodes as a bridge. A discharge gap (d1) is formed between the scan bus electrode 221a and the sustain bus electrode 231a.

  Each of the scanning bus electrodes 221a, 222a, and 223a (223a is not shown in the sectional view) includes a black layer 221c, 222c, and 223c (not shown in the figure) and a conductive layer 221d, 222d, and 223d (not shown in the figure). ). Each of the sustain bus electrodes 231a, 232a, 233a (233a is not shown in the sectional view) is also a black layer 231c, 232c, 233c (not shown in the figure) and conductive layers 231d, 232d, 233d (not shown in the figure). ). Hereinafter, the scan bus electrodes 221a, 222a, 223a and the sustain bus electrodes 231a, 232a, 233a are simply referred to as “bus electrodes 221a, 222a, 223a” and “bus electrodes 231a, 232a, 233a”, respectively. Further, the scanning transparent electrode 22b and the sustain transparent electrode 23b are simply referred to as “transparent electrode 22b” and “transparent electrode 23b”, respectively.

  Black layers 221c, 222c, 223c (not shown in the figure), 231c, 232c, 233c (not shown in the figure) are bus electrodes 221a, 222a, 223a, 231a, 232a when the panel is viewed from the display surface side. 233a is made black so that, for example, a black material mainly composed of ruthenium oxide is formed on the front substrate 21 in a ladder shape composed of narrow stripes and bridges connecting the stripes. is there. Conductive layers 221d, 222d, and 223d (not shown in the drawing), 231d, 232d, and 233d (not shown in the drawing) are provided to increase the conductivity of the bus electrodes 22a and 23a, and the black layer 221c. , 222c, 223c, 231c, 232c, and 233c are formed by laminating a conductive material containing silver.

  The black stripe 25 is provided to make the display surface appear black when the panel is viewed from the display surface side. For example, a black material mainly composed of ruthenium oxide is formed on the front substrate 21.

  In this embodiment, a black material mainly composed of ruthenium oxide is used as the black layer, but the material to which the present invention is applied is not limited to this material, and the firing is mainly composed of a black pigment. Other materials that appear black after the process can be applied.

  The transparent electrodes 22b and 23b are provided for generating a strong electric field in the discharge space to generate a discharge and taking out the light generated in the phosphor layer 35 to the outside of the panel. Each of the transparent electrodes 22b and 23b is coated with a dispersion containing fine particles of a metal or metal oxide selected from indium, tin, antimony, aluminum and zinc in the form of stripes or strips of ladder-like metal electrodes. It is formed by drying in an oxidizing atmosphere and then firing in an oxidizing atmosphere.

  The bus electrodes 223a and 233a have a structure for compensating for the disconnection when any of the bus electrodes 221a, 222a, 231a, and 232a is disconnected, so as not to be defective. The width of the metal electrode is reduced to increase the panel display transmittance. This is an important structure as a countermeasure against an increase in the disconnection rate.

  The embodiment of the present invention is characterized in the positions where bus electrodes 223a and 233a (hereinafter simply referred to as bridge electrodes 223a and 233a) connected as bridges are formed. Specifically, the position where the bridge electrodes 223a and 233a are formed corresponds to the position where the phosphor layer 35 formed on the back plate 30 is present and the position where the bridge electrode 223a is formed. The color of the phosphor layer 35 and the color of the phosphor layer 35 corresponding to the position where the bridge electrode 233a is formed are different.

  In the example shown in FIG. 2, the bridge electrode 223 a corresponds to the position of the red phosphor in the phosphor layer 35, and the bridge electrode 233 a corresponds to the position of the green phosphor in the phosphor layer 35.

  In a conventional ladder-shaped electrode without a transparent electrode, in order to obtain a sufficient discharge spread, it is necessary to arrange the bridge electrodes 223a and 233a of the ladder in the vicinity of the center of the discharge cell for each discharge cell, and the bus electrode 223a. Although the display opening area is reduced by 233a and sufficient luminance cannot be obtained, the configuration of this embodiment can secure the spread of discharge with the transparent electrode, and the bus electrodes 223a and 233a that reduce the display opening area are divided into four minutes. Since it can be reduced to 1, the display aperture area can be widened, the luminance and light emission efficiency can be increased, the color of the phosphor layer 35 to be shielded from light is not biased, and color unevenness can also be suppressed. Moreover, a part of bridge electrode 223a, 233a may be on a partition.

  Furthermore, in the embodiment of the present invention, since the transparent electrode is formed by the ink jet direct pattern forming method, the number of steps and the materials used are less than the conventional transparent electrode forming method, and the cost can be greatly reduced. .

  Below, an example of the manufacturing method of the panel 10 of embodiment of this invention is demonstrated using FIG.3 and FIG.4. FIG. 3 is a diagram illustrating an example of a method for manufacturing the front plate 20 of the panel 10 according to the embodiment of the present invention.

  In order to manufacture the front plate 20, first, the glass front substrate 21 is alkali washed.

  Next, the transparent electrodes 22b and 23b are formed. In order to form the transparent electrodes 22b and 23b, first, the average particle diameter is 5 nm to 100 nm, and the fine particles of at least one metal in indium, tin, antimony, aluminum and zinc, or at least in these metals Fine particles of one metal oxide (including two or more elements of these metals, including so-called composite oxide fine particles), or fine particles of two or more alloys of these metals, or these fine particles A dispersion containing a mixture of In the present embodiment, indium-tin alloy fine particles having an average particle diameter of 10 nm were dispersed in an organic solvent together with a dispersant at a concentration of 12 wt% to prepare a dispersion. In addition, although decahydronaphthalene was used as the organic solvent, other than this, for example, nonpolar solvents such as toluene, xylene, benzene, and tetradecane, aromatic hydrocarbons, hexane, heptane, octane, nonane, Long-chain alkanes such as decane, undecane, dodecane, tridecane, tetradecane, pentadecane, hexadecane, octadecane, nonadecane, eicosane, and trimethylpentane, and cyclic alkanes such as cyclohexane, cycloheptane, and cyclooctane can be used.

  Next, the dispersion liquid is applied in a stripe shape using an inkjet coating method to form the precursors 22bx and 23bx of the transparent electrodes 22b and 23b. In the present embodiment, the precursors 22bx and 23bx of the transparent electrodes 22b and 23b were formed using an ink jet coating apparatus having a multi-hole fine nozzle. At this time, the coating was performed such that the distance d2 between the precursor 22bx on the discharge gap side and the precursor 23bx was larger than the distance d1 of the discharge gap (FIG. 3A).

Thereafter, the front substrate 21 on which the precursors 22bx and 23bx are formed is dried and baked at 400 ° C. to 600 ° C. in an oxidizing atmosphere to form transparent electrodes 22b and 23b made of a transparent conductive film of 80 nm to 1000 nm. . In the present embodiment, first, the front substrate 21 on which the precursors 22bx and 23bx were formed was dried by holding at 230 ° C. for 10 minutes under a reduced pressure of 1 × 10 ⁻³ Pa. After that, it was baked while being held at 500 ° C. for 60 minutes in the atmosphere to form transparent electrodes 22b and 23b made of an ITO film having a thickness of about 300 nm (FIG. 3B).

  Thereafter, black layers 221c, 222c, 223c (223c is not shown in the figure), 231c, 232c, 233c (233c is not shown in the figure) using a paste for black layer mainly composed of ruthenium oxide or a black pigment. ), Precursors 221cx, 222cx, 223cx, 231cx, 232cx, 233cx, and a precursor 25x of the black stripe 25 are formed. At this time, the precursor 221cx is formed so as to cover the outer edge of the transparent electrode 22b on the discharge gap side, and the precursor 231cx is formed so as to cover the outer edge of the transparent electrode 23b on the discharge gap side. The distance between the precursor 221cx and the precursor 231cx is the discharge gap distance d1. The precursor 222cx is formed so as to overlap at least a part of the transparent electrode 22b, and the precursor 232cx is formed so as to overlap at least a part of the transparent electrode 23b. Then, conductive layers 221d, 222d, 223d (223d is not shown in the figure), 231d, 232d, 233d are formed on the precursors 221cx, 222cx, 223cx, 231cx, 232cx, 233cx using a conductive layer paste containing silver. The precursors 221dx, 222dx, 223dx, 231dx, 232dx and 233dx are formed (233d is not shown in the figure).

  Since the bus electrodes 221a and 231a form a discharge gap, the precursors 221cx, 231cx, 221dx, and 231dx, which are precursors thereof, need to be formed with high accuracy. In the present embodiment, a photosensitive black layer paste is applied to the entire surface of the front substrate 21 using a screen printing method and exposed using an exposure mask. Thereafter, a photosensitive conductive layer paste is applied to the entire surface of the front substrate 21 and exposed using an exposure mask. Thereafter, development was performed to form precursors 221cx, 222cx, 223cx, 231cx, 232cx, 233cx, 25x, 221dx, 222dx, 223dx, 231dx, 232dx, and 233dx (FIG. 3C).

  Next, the front substrate 21 on which the precursors 221cx, 222cx, 223cx, 231cx, 232cx, 233cx, 25x, 221dx, 222dx, 223dx, 231dx, 232dx, and 233dx are formed is fired to obtain bus electrodes 221a, 222a, 223a, 231a, 232a, 233a and a black stripe 25 are formed. The peak temperature of the firing at this time is desirably 550 ° C. to 600 ° C., and is 580 ° C. in this embodiment. The thicknesses of the bus electrodes 221a, 222a, 223a, 231a, 232a, and 233a are preferably 1 μm to 6 μm, and in this embodiment, 4 μm (FIG. 3D).

  Next, a precursor of a dielectric layer is formed on the front substrate 21 on which the scan electrode 22, the sustain electrode 23, and the black stripe 25 are formed by a known technique such as a screen printing method. Then, the dielectric layer precursor is baked to form a dielectric layer 26 having a thickness of 20 μm to 50 μm.

  In this embodiment mode, boron oxide 35 wt%, silicon oxide 1.4 wt%, zinc oxide 27.6 wt%, barium oxide 3.3 wt%, bismuth oxide 25 wt%, aluminum oxide 1.1 wt%, molybdenum oxide 4. A dielectric paste containing dielectric glass containing 0 wt% and tungsten oxide 3.0 wt% was prepared. The dielectric glass thus prepared has a softening point of about 570 ° C. Next, a dielectric paste was applied to the front substrate 21 on which the scan electrodes 22, the sustain electrodes 23, and the black stripes 25 were formed by a die coating method to form a dielectric layer precursor. Then, the dielectric layer precursor was baked at about 590 ° C. to form the dielectric layer 26. The thickness of the dielectric layer 26 at this time is about 40 μm.

  In addition to the above, as the dielectric paste, for example, boron oxide, silicon oxide, zinc oxide, alkaline earth oxide, alkali metal oxide, bismuth oxide, aluminum oxide, molybdenum oxide, tungsten oxide, cerium oxide, etc. A dielectric paste containing dielectric glass having a softening point of 520 ° C. to 590 ° C. including some of them can be used.

  Then, a protective layer 27 containing magnesium oxide as a main component is formed on the dielectric layer 26 by a known technique such as a vacuum deposition method (FIG. 3E).

  In the present embodiment, the transparent electrodes 22b and 23b made of an ITO film are formed in stripes using indium-tin alloy fine particles. However, in addition to the above, for example, tin fine particles are used to form the transparent electrodes 22b and 23b. A transparent electrode made of a zinc oxide film may be formed using zinc fine particles. Moreover, a transparent electrode made of an ITO film may be formed using indium-tin composite oxide fine particles (ITO fine particles), or a transparent electrode made of a tin oxide film may be formed using fine particles of tin oxide. Alternatively, a transparent electrode made of a zinc oxide film may be formed using fine particles of zinc oxide. Further, as the shape of the transparent electrodes 22b and 23b, the area surrounded by the bus electrodes 221a, 222a and 223a or the area surrounded by 231a, 232a and 233a is covered, and does not protrude from the scanning electrodes from 221a and 222a, or It may be formed in a strip shape having a size that does not protrude from the sustain electrodes from 231a and 232a.

  In the present embodiment, the precursors 22bx and 23bx of the transparent electrodes 22b and 23b are fired, and then the precursors 221cx, 222cx and 231cx of the black layers 221c, 222c, 231c and 232c and the conductive layers 221d, 222d, 231d and 232d are baked. 232cx, 221dx, 222dx, 231dx, 232dx were formed and fired. However, for example, the black layers 221c, 222c, 231c, and 232c and the conductive layers 221d, 222d, 231d, and 232d precursors 221cx, 222cx, 231cx, 232cx, 221dx, and the precursors 22bx and 23bx of the transparent electrodes 22b and 23b, 222 dx, 231 dx, 232 dx are formed, and then the precursors 22 bx, 23 bx, 221 cx, 222 cx, 231 cx, 232 cx, 221 dx, 222 dx, 231 dx, 232 dx are simultaneously fired to form the scan electrode 22 and the sustain electrode 23. Good.

  Next, a method for manufacturing the back plate 30 will be described. FIG. 4 is a diagram for explaining a method of manufacturing the back plate 30 in the present embodiment.

  First, using a known technique such as a screen printing method or a photolithography method, a conductive layer paste containing silver as a main component is applied on the back substrate 31 in stripes at regular intervals, and a precursor 32x of the data electrode 32 is obtained. Form. (FIG. 4A).

  Next, the back substrate 31 on which the precursor 32x is formed is baked to form the data electrodes 32. The data electrode 32 has a thickness of 2 to 10 μm, for example. (FIG. 4B). In the present embodiment, the thickness of the data electrode 32 is 3 μm.

  Subsequently, a dielectric paste is applied on the back substrate 31 on which the data electrodes 32 are formed, and then baked to form a base dielectric layer 33. The thickness of the base dielectric layer 33 is, for example, about 5 to 15 μm (FIG. 4C). In the present embodiment, the thickness of the base dielectric layer 33 is 10 μm.

  Subsequently, a photosensitive dielectric paste is applied on the back substrate 31 on which the base dielectric layer 33 is formed, and then fired to form a precursor of the partition wall 34. Thereafter, the barrier ribs 34 are formed by exposure using an exposure mask and etching. The height of the partition wall 34 is, for example, 100 to 150 μm (FIG. 4D). In the present embodiment, the height of the partition wall 34 is 120 μm.

  Then, a phosphor ink containing any one of a red phosphor, a green phosphor, and a blue phosphor is applied to the wall surface of the partition wall 34 and the surface of the base dielectric layer 33. Thereafter, the phosphor layer 35 is formed by drying and firing.

Examples of the red phosphor include (Y, Gd) BO ₃ : Eu, (Y, V) PO ₄ : Eu, and examples of the green phosphor include Zn ₂ SiO ₄ : Mn, (Y, Gd) BO _3. : Tb, (Y, Gd) Al ₃ (BO ₃ ) ₄ : Tb, etc., and as the blue phosphor, for example, BaMgAl ₁₀ O ₁₇ : Eu, Sr ₃ MgSi ₂ O ₈ : Eu, etc. can be used, respectively ( FIG. 4 (e)).

  Then, the front plate 20 and the back plate 30 described above are arranged to face each other so that the display electrode pair 24 and the data electrode 32 are three-dimensionally crossed, and the low melting point glass is placed at a position outside the image display area where the discharge cells are formed. Use and seal. Thereafter, a discharge gas containing xenon is sealed in the internal discharge space, and the panel 10 is completed.

  In the present embodiment, as described above, the transparent electrodes 22b and 23b are formed using the ink jet coating method. According to the ink jet printing method, since the dispersion liquid is applied only to a necessary portion, there is an advantage that there is no waste of material and that even a complicated pattern can be easily handled. On the other hand, since the accuracy of the application shape is limited by the spot diameter when the ink droplets land, there is a drawback that it is difficult to apply with high accuracy.

  However, in the present embodiment, the discharge gap is formed at the outer edge of the bus electrode 221a and the bus electrode 231a on the discharge gap side, and the transparent electrodes 22b and 23b are formed so as to fit inside the bus electrode. I have to.

  Therefore, the distance d1 of the discharge gap is not determined by the distance between the transparent electrodes 22b and 23b, but is determined by the distance between the bus electrode 221a and the bus electrode 231a formed with high precision. Accordingly, the discharge gap can be formed with high accuracy, and variations in discharge characteristics between discharge cells can be suppressed to a small level.

  In the present embodiment, first, the transparent electrodes 22b, 23b or a precursor thereof are formed, and then the bus electrodes 221a, 222a, 223a and the bus are formed so as to cover the outer edges of the transparent electrodes 22b, 23b or the precursor thereof. The electrodes 231a, 232a, 233a and the black stripe 25 are formed. However, as shown in FIG. 5, the bus electrodes 221a, 222a, 223a, 231a, 232a, 233a and the black stripe 25 are formed, and then the transparent electrodes 22b, 23b are formed. It may be formed.

  It should be noted that the specific numerical values used in the present embodiment are merely examples, and it is desirable to appropriately set the optimal values according to the panel specifications and the like.

  INDUSTRIAL APPLICABILITY The present invention is useful as a structure that can provide a panel that can display a high-quality image with high luminance and luminous efficiency, small variations in discharge characteristics among discharge cells, and preventing color unevenness.

DESCRIPTION OF SYMBOLS 10 Panel 20 Front plate 21 Front substrate 22 Scan electrode 22b, 23b Transparent electrode 22bx, 23bx (Transparent electrode) precursor 23 Sustain electrode 24 Display electrode pair 25 Black stripe 25x (Black stripe) precursor 26 Dielectric layer 27 Protection Layer 30 Back plate 31 Back substrate 32 Data electrode 32x (Data electrode) precursor 33 Base dielectric layer 34 Partition 35 Phosphor layer 221a, 222a, 231a, 232a Bus electrode 221c, 222c, 231c, 232c Black layer 221cx, 222cx 231cx, 232cx (black layer) precursor 221d, 222d, 231d, 232d conductive layer 221dx, 222dx, 231dx, 232dx (conductive layer) precursor 223a, 233a Bridge electrode (bus electrode)

Claims (3)

A plasma display formed of a front substrate having a plurality of display electrode pairs in which a discharge gap is formed between a pair of scan electrodes and sustain electrodes, and a rear substrate in which a phosphor is formed between the barrier ribs adjacent to the barrier ribs. A panel,
The scan electrode has a scan bus electrode and a scan transparent electrode, and the sustain electrode has a sustain bus electrode and a sustain transparent electrode,
The scan bus electrode and the sustain bus electrode are respectively formed on the front substrate so as to form the discharge gap.
The scan electrodes and the sustain electrodes constituting the pair of display electrodes are formed in a ladder shape by a plurality of longitudinal electrodes and a bridge electrode connecting them,
In the gap between the ladder-shaped electrodes, a transparent electrode is formed by applying and baking a dispersion containing fine particles of metal or metal oxide,
The position where the bridge electrode is formed corresponds to the position where the phosphor is formed,
A plasma display panel, wherein a color of the phosphor at a position where the bridge electrode is formed is different from a color of the phosphor at a position where the adjacent bridge electrode is formed. 2. The plasma display panel according to claim 1, wherein a part of each of the bridge electrodes is formed at a position corresponding to a position at which the partition walls are formed. The plasma display panel according to claim 1, wherein the dispersion is applied by an inkjet method.