JP4603432B2 - Plasma display panel - Google Patents

Description

  The present invention relates to a plasma display panel, and more particularly to a plasma display panel that displays a color image.

  The plasma display panel (hereinafter referred to as PDP) is easy to enlarge, has good display quality, and has a wide viewing angle compared to a liquid crystal display. For example, it has come to be used as a large display device such as a wall-mounted display.

  In a PDP, a rare gas or a mixed gas of rare gas is sealed in a discharge space of a discharge element provided between a front plate and a rear plate, and voltage is applied to display electrodes and address electrodes provided on the front plate and the rear plate. The flat display device obtains visible light emission by generating a discharge by exciting the phosphor with visible excited light emission of gas generated at that time or excited ultraviolet light.

  Next, a configuration of a conventional PDP 10 that displays a color image will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of a conventional PDP, and FIG. 2 is a view of the PDP shown in FIG. 1 and 2, the Y and Y directions indicate the scanning direction (the extending direction of the address electrodes 13), and the X and X directions indicate the horizontal direction orthogonal to the scanning direction. .

  The PDP 10 includes a plurality of discharge elements 20, and roughly includes a back plate 11 and a front plate 19. The back plate 11 includes a glass substrate 12, address electrodes 13, a dielectric layer 14, a partition wall 15, and a phosphor 16. On the glass substrate 12, a plurality of address electrodes 13 extending in the scanning direction are provided. The dielectric layer 14 is formed so as to cover the address electrodes 13 and the glass substrate 12. A plurality of partition walls 15 are provided on the dielectric layer 14 so as to separate the plurality of address electrodes 13 one by one. The phosphor 16 includes a red phosphor 16A, a blue phosphor 16B, and a green phosphor 16C. The red phosphor 16A, the blue phosphor 16B, and the green phosphor 16C include the red phosphor 16A, The blue phosphor 16B and the green phosphor 16C are formed in that order between the side wall of the partition wall 15 and the dielectric layer 14, respectively.

  The front plate 19 includes a glass substrate 21, a display electrode 22, an electrode bus 23, a dielectric layer 25, and a protective film 26. A display electrode 22 extending in the horizontal direction is provided on the surface of the glass substrate 21 facing the back plate 11. The display electrode 22 which is a transparent electrode has a configuration in which the scanning electrode 22A and the sustaining electrode 22B are paired.

  An electrode bus bar 23 is formed on each of the scan electrode 22A and the sustain electrode 22B. The electrode bus 23 is for lowering the resistance value, and generally a metal having no transparency is used. The dielectric layer 25 is formed on the glass substrate 21 so as to cover the display electrode 22 and the electrode bus bar 23. The protective film 26 is formed so as to cover the dielectric layer 25.

  The discharge element 20 is provided in a region where the display electrode 22 and the address electrode 13 face each other. In brief, the display electrode 22, the address electrode 13, the dielectric layers 14 and 25, the red phosphor 16A, and the blue The phosphor 16 </ b> B and the green phosphor 16 </ b> C, a protective film 26, and an electrode bus 23 are included.

  A discharge space 17 is formed between each phosphor 16 and the protective film 26. The discharge space 17 is filled with a gas composed of a rare gas or a mixed gas of rare gases. The discharge element 20 includes a discharge element 20A having a red phosphor 16A, a discharge element 20B having a blue phosphor 16B, and a discharge element 20C having a green phosphor 16C. Further, the pixel 24 is constituted by the discharge elements 20A to 20C.

  A plurality of scanning lines 27 are formed in the PDP 10 configured as described above, and a color image can be displayed by displaying the scanning lines 27 one line at a time from the top (for example, non-patent). Reference 1).

  Next, another conventional PDP 30 will be described with reference to FIG. FIG. 3 is an exploded perspective view of another conventional PDP. The PDP 30 includes a plurality of discharge elements (not shown), and roughly includes a back plate 31 and a front plate 41. The PDP 30 is configured to have a plurality of scanning lines 49. The discharge element is provided in a region where the display electrode 43 and the address electrode 33 face each other (a region surrounded by the partition wall 35).

  The back plate 31 includes a glass substrate 32, a plurality of address electrodes 33, a dielectric layer 34, a partition wall 35, and a phosphor 36. The barrier ribs 35 are provided in the horizontal direction and the scanning direction so as to separate the discharge elements for each discharge element. The phosphor 36 includes a red phosphor 36A, a blue phosphor 36B, and a green phosphor 36C. The red phosphor 36A, the blue phosphor 36B, and the green phosphor 36C are provided on the dielectric layer 34 and the partition 35 surrounded by the partition 35, respectively.

  The front plate 41 includes a glass substrate 42, display electrodes 43, electrode bus bars 46, a dielectric layer 47, and a protective film 48. The display electrode 43, which is a transparent electrode, has a configuration in which a scanning electrode 45 having a T shape and a sustaining electrode 44 having a T shape form a pair. On the glass substrate 42, a plurality of display electrodes 43 configured as described above are formed. The sustain electrode 44 and the scan electrode 45 are each formed with an electrode bus bar 46 extending in the horizontal direction. The electrode bus 46 is for lowering the resistance value, and generally a metal having no permeability is used.

In a state where the back plate 31 and the front plate 41 are bonded together, a discharge element having a discharge space is formed between the back plate 31 and the front plate 41. The discharge space is filled with a gas composed of a rare gas or a mixed gas of rare gases. A plurality of scanning lines 49 are formed in the PDP 30 configured as described above, and a color image can be displayed by displaying the scanning lines 49 one line at a time from the top (for example, non-patented). (See Reference 1.)
In such PDPs 10 and 30, it is desired to increase the resolution of displayed images, and miniaturization of discharge elements is being studied. However, when the discharge element is miniaturized, there is a problem that the variation in discharge characteristics increases, the drive voltage increases, and the operation margin when the PDPs 10 and 30 are driven decreases. Some PDPs aimed at solving such problems display a high-resolution image by changing the driving method (see, for example, Non-Patent Documents 2 and 3).
Further, in the conventional PDPs 10 and 30, one display electrode includes a discharge element including a red phosphor, a discharge element including a blue phosphor, and a discharge element including a green phosphor arranged in a horizontal direction. Are commonly used, and in the case of sustain discharge, a discharge element having a red phosphor arranged in a horizontal direction, a discharge element having a blue phosphor, and a discharge element having a green phosphor. The same voltage pulse is applied. Therefore, for example, when the light emission amount of the blue phosphor is smaller than that of the red phosphor and the green phosphor, it is necessary to correct the emission luminance of the red phosphor and the green phosphor. However, in the PDP that performs such correction processing, the low bit signal becomes invalid and the gradation characteristics are degraded.

  In addition, a scan electrode is used at the time of address discharge, but an appropriate voltage pulse is different for each discharge element. Therefore, when one voltage pulse is set, the PDP cannot be stably driven due to erroneous writing (for example, The discharge element selected at the time of address discharge is not sustain-discharged).

A conventional PDP for solving these problems includes a discharge element having a red phosphor arranged in a horizontal direction, a discharge element having a blue phosphor, and a discharge element having a green phosphor. There is a configuration in which a voltage is applied to the display electrode by adjusting the voltage pulse to the display electrode by arranging each color in the scanning direction and using a common display electrode for each color (for example, see Patent Document 1).
Hiroshi Murakami, Satoshi Shinoda, Koichi Wada, “Large-screen wall-mounted TV -Plasma Display-”, Corona Co., Ltd. ) Matsushita Technical Journal Vol.46 No.3 “42-inch Full HD-PDP Technology” (June 2000) Fujitsu “Special Feature Display” (11), 25-inch SXGA high-definition color PDP cell structure and drive system (FUJITSU.49,3, pp.214-219,05,1998) JP-A-10-123999

  However, in the case of a PDP in which the driving method is changed, there is a problem that the driving circuit and the like must be changed. In addition, in a PDP in which a display electrode is shared for each phosphor color and a voltage pulse for the display electrode can be adjusted for each phosphor color, the resolution and gradation characteristics of the displayed image are improved. There was a problem that could not.

  Therefore, the present invention has been made in view of the above-described problems, and provides a plasma display panel that can be driven stably, can improve the resolution of a displayed image, and can adjust luminance and gradation characteristics. The purpose is to do.

  In order to solve the above-mentioned problems, the present invention is characterized by the following measures.

In the first aspect of the present invention, a first substrate having a first display electrode formed in a direction orthogonal to the scanning direction, a first address electrode formed in the scanning direction, and the scanning direction A second substrate having first and second phosphors formed and alternately arranged in a direction orthogonal to the scanning direction, and disposed between the first substrate and the second substrate. A second phosphor formed on the first substrate side with a third phosphor and a second address electrode orthogonal to the first display electrode, and formed on the other side in a direction orthogonal to the scanning direction. And a third substrate having the display electrode, and the first display electrode and the second display electrode are arranged so as to overlap each other in a direction perpendicular to the surface direction of the first substrate. In addition, the colors of the first to third phosphors are made different from each other, so that the first substrate and the third substrate Between the first discharge element including the third phosphor, the second discharge element including the first phosphor between the second substrate and the third substrate, and the second discharge element. And a third discharge element including the phosphor, and the first discharge element and the second and third discharge elements are overlapped in a direction perpendicular to the surface direction of the first substrate. This can be solved by a plasma display panel characterized by being arranged.

  According to the above invention, the first to third phosphors are made different in color so that the first discharge element and the second and third discharge elements face each other. Compared with a conventional PDP composed of a face plate and a back plate, the resolution in the direction orthogonal to the scanning direction can be improved. Further, since it is not necessary to change the driving circuit of the conventional PDP, the conventional driving method can be applied.

According to a second aspect of the present invention, a first substrate having a first display electrode formed in a direction orthogonal to the scanning direction, a first address electrode and a first phosphor formed in the scanning direction. And a second address electrode disposed between the first substrate and the second substrate and orthogonal to the first display electrode on the first substrate side, Second and third phosphors formed in the scanning direction and alternately arranged in a direction orthogonal to the scanning direction and formed on the other side in a direction orthogonal to the scanning direction And a third substrate having the display electrode, and the first display electrode and the second display electrode are arranged so as to overlap each other in a direction perpendicular to the surface direction of the first substrate. In addition, the colors of the first to third phosphors are made different from each other, so that the second substrate and the third substrate In between, the 1st discharge element provided with the 1st fluorescent substance, the 2nd discharge element provided with the 2nd fluorescent substance between the 1st substrate and the 3rd substrate, and the 3rd And a third discharge element including the phosphor, and the first discharge element and the second and third discharge elements are overlapped in a direction perpendicular to the surface direction of the first substrate. This can be solved by a plasma display panel characterized by being arranged.

  According to the above invention, the first to third phosphors are made different in color so that the first discharge element and the second and third discharge elements face each other. Compared with a conventional PDP composed of a face plate and a back plate, the resolution in the direction orthogonal to the scanning direction can be improved. Further, since it is not necessary to change the driving circuit of the conventional PDP, the conventional driving method can be applied.

According to a third aspect of the present invention, when the first to third discharge elements are subjected to the sustain discharge, the period of the pulse applied to the first and second display electrodes is set to the first discharge element and the second and second discharge elements. The plasma display panel according to claim 1 or 2 can solve the problem.

  According to the above invention, when the first to third discharge elements are subjected to the sustain discharge, the period of the pulse applied to the first and second display electrodes is set for each of the first to third discharge elements. The luminance and gradation characteristics can be adjusted for each of the first to third discharge elements.

According to a fourth aspect of the present invention, when the first to third discharge elements are subjected to the sustain discharge, the amplitude of a pulse applied to the first and second display electrodes is set to the first discharge element and the second discharge element. The plasma display panel according to any one of claims 1 to 3 , which is set for each of the first and third discharge elements.

  According to the above invention, when the first to third discharge elements are subjected to the sustain discharge, the amplitude of the pulse applied to the first and second display electrodes is set for each of the first to third discharge elements, The luminance and gradation characteristics can be adjusted for each of the first to third discharge elements.

  As described above, according to the present invention, it is possible to provide a plasma display panel that can be stably driven, can improve the resolution of a displayed image, and can adjust luminance and gradation characteristics.

  Next, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, the schematic configuration of the PDP 60 according to the first embodiment of the present invention will be described with reference to FIGS. 4 is an exploded perspective view of the PDP according to the first embodiment of the present invention, FIG. 5 is a view of the PDP shown in FIG. 4 assembled and viewed from B, and FIG. 6 is a view of the PDP shown in FIG. FIG. 4 to 6, the Y and Y directions indicate the scanning direction (the extending direction of the address electrodes 77, 87, and 102), and the X and X directions are horizontal directions orthogonal to the scanning direction. (Extending direction of display electrodes 67, 91, 105) is shown. The Z and Z directions indicate directions orthogonal to the surface direction of the front plate 65.

  The PDP 60 includes a first discharge element 121, a second discharge element 122, and a third discharge element 123, roughly speaking, a front plate 65 that is a first substrate and a spine that is a second substrate. The structure includes a face plate 75, an intermediate substrate 85 as a third substrate, an intermediate substrate 100 as a fourth substrate, and a drive control device (not shown).

  The drive control device is for performing drive control of the PDP 60. The front plate 65 is disposed so as to face the back plate 75. The intermediate substrate 85 is disposed between the front plate 65 and the intermediate substrate 100, and the intermediate substrate 100 is disposed between the intermediate substrate 85 and the back plate 75. The PDP 60 is provided with n scanning lines 70 (n is a natural number).

  The front plate 65 generally includes a glass substrate 66, a display electrode 67 that is a first display electrode, an electrode bus 71, a dielectric layer 72, and a protective film 73.

On the glass substrate 66 on the side facing the intermediate substrate 85, n display electrodes 67 extending in the horizontal direction are provided in a strip shape. The display electrode 67 has a configuration in which a scan electrode 68 and a sustain electrode 69 are paired, and n scan electrodes 68 and n sustain electrodes 69 are provided. Scan electrode 68 and sustain electrode 69 are arranged in parallel to the horizontal direction. The scan electrode 68 and the sustain electrode 69 can be made of, for example, a material such as ITO or SnO ₂ and can be formed to a thickness of about 150 nm, for example.

  The electrode bus 71 is provided on the scan electrode 68 and the sustain electrode 69 so as to extend in the scan direction. The electrode bus 71 is for lowering the resistance value. For example, a material such as Cr—Cu—Cr or Ag can be used as the material of the electrode bus 71, and the thickness of the electrode bus 71 can be formed to, for example, about several μm. The electrode bus 71 can be formed by etching or directly exposing a material to be the electrode bus 71 containing a photosensitive component.

  The dielectric layer 72 is formed so as to cover the display electrode 67 and the electrode bus 71 and the glass substrate 66 on the side where the display electrode 67 is provided. The protective film 73 is formed so as to cover the dielectric layer 72. When forming the dielectric layer 72 and the protective film 73, a material having high transparency in the visible light emitting region can be used. The dielectric layer 72 can be formed to a thickness of about 10 to 40 μm, for example, and the protective film 73 can be formed to a thickness of about 500 to 800 nm, for example. The dielectric layer 72 and the protective film 73 may be provided only in a region where the display electrode 67 and the electrode bus 71 are formed.

  The back plate 75 includes a glass substrate 76, an address electrode 77 as a first address electrode, a dielectric layer 78, a partition wall 79, and a green phosphor 81 as a first phosphor. ing. On the surface of the glass substrate 76 facing the intermediate substrate 100, m address electrodes 77 (m is a natural number) extending in the scanning direction are formed. For example, a metal material such as Al can be used for the address electrode 77, and the thickness of the address electrode 77 can be formed to about several μm, for example.

  The dielectric layer 78 is provided on the glass substrate 76 so as to cover the address electrodes 77. The dielectric layer 78 is for protecting the address electrode 77. For the dielectric layer 78, it is preferable to use a material having high reflectivity and high transparency. For example, a white dielectric paste film can be used. Moreover, the thickness of the dielectric material layer 78 can be formed, for example to about 10-40 micrometers.

  The dielectric layer 78 is provided with a plurality of partition walls 79 for separating the m address electrodes 77 one by one. The plurality of partition walls 79 are arranged to face a partition wall 112 described later provided on the intermediate substrate 100.

The horizontal width L1 between the partition walls 79 is configured to be substantially the same as the width L3 between the partition walls 112. As a material of the partition wall 79, for example, a powder obtained by forming a powder of PbO, B ₂ O ₃ , SiO ₂ or the like into a glass paste can be used. Moreover, the height of the partition 79 can be formed, for example, 90 to 180 μm, and the horizontal width L1 between the partitions 79 can be formed, for example, to about 20 to 100 μm. The partition wall 79 can be formed by a screen printing method or a sand blast method.

The green phosphor 81 is formed over the dielectric layer 78 and the side walls of the partition walls 79. For example, Zn ₂ SiO ₄ : Mn ²⁺ can be used as the material of the green phosphor 81. The green phosphor 81 can be formed to a thickness of about 10 to 20 μm by, for example, a screen printing method.

  The back plate 75 is formed with at least one through hole (not shown) for exhausting unnecessary gas in discharge spaces 124 to 126 to be described later and enclosing gas necessary for discharge. . This through hole can be provided in either the back plate 75 or the front plate 65.

  In short, the intermediate substrate 85 includes a glass substrate 86, an address electrode 87 as a second address electrode, a dielectric layer 88, a partition wall 89, a red phosphor 82 as a second phosphor, and a second phosphor. The display electrode 91, which is a display electrode, an electrode bus 94, a dielectric layer 95, and a protective film 96 are provided.

  The glass substrate 86 on the side facing the front plate 65 is provided with m address electrodes 87 (the same number as the address electrodes 77 provided on the back plate 75) extending in the scanning direction. 87 is arranged to face the address electrode 77 provided on the back plate 75.

For the address electrode 87, a transparent electrode material such as ITO or SnO ₂ or a metal electrode material such as Al can be used, and the thickness of the address electrode 87 can be formed to about several μm, for example. Further, when a metal electrode material such as Al is used, the horizontal width L4 of the address electrode 87 may be configured to be not more than half of the horizontal width L2 between the partition walls 89.

  The dielectric layer 88 is formed on the glass substrate 86 so as to cover the address electrodes 87. The dielectric layer 88 is for protecting the address electrode 87. The dielectric layer 88 can be made of a highly reflective material with high reflectivity. The dielectric layer 88 can be formed to a thickness of about 10 to 40 μm, for example.

  On the dielectric layer 88, a plurality of partition walls 89 are provided for separating the m address electrodes 87 one by one. The plurality of partition walls 89 are arranged to face partition walls 112 described later provided on the intermediate substrate 100.

As a material of the partition wall 89, a material obtained by converting a powder of PbO, B ₂ O ₃ , SiO ₂ or the like into a glass paste can be used. Further, the height of the partition wall 89 can be formed, for example, 90 to 180 μm, and the horizontal width L2 of the partition wall 89 can be formed, for example, to about 20 to 100 μm. The barrier ribs 89 can be formed by a screen printing method or a sand blast method. The red phosphor 82 is formed over the dielectric layer 88 and the side walls of the barrier ribs 89. The red phosphor 82 can be formed by, for example, a screen printing method, an EB vapor deposition method, or a CVD method. For example, (Y, Gd) BO ₃ : Eu ³⁺ can be used as the material of the red phosphor 82.

  On the glass substrate 86 on the side facing the intermediate substrate 100, n display electrodes 91 (the same number as the display electrodes 67 provided on the front plate 65) extending in the horizontal direction are provided in a strip shape.

The display electrode 91 has a configuration in which a scan electrode 92 and a sustain electrode 93 are paired, and n scan electrodes 92 and n sustain electrodes 93 are provided. Scan electrode 92 and sustain electrode 93 are arranged in parallel to the horizontal direction. For example, ITO or SnO ₂ can be used as the material of the scan electrode 92 and the sustain electrode 93, and the thickness of the scan electrode 92 and the sustain electrode 93 can be formed to about 150 nm, for example.

  The scan electrode 92 and the sustain electrode 93 are each formed with an electrode bus 94 extending in the scan direction. The electrode bus 94 is for lowering the resistance value. For example, a material such as Cr—Cu—Cr or Ag can be used for the electrode bus 94, and the thickness of the electrode bus 94 can be formed to about several μm, for example. The electrode bus 94 can be formed by etching or directly exposing a material to be the electrode bus 94 containing a photosensitive component.

  The dielectric layer 95 is formed so as to cover the glass substrate 86 on the surface on which the display electrode 91 and the electrode bus 94 are formed, and the display electrode 91 and the electrode bus 94. The protective film 96 is formed so as to cover the dielectric layer 95. When the dielectric layer 95 and the protective film 96 are formed, a material having high transparency in the visible light emitting region may be used. The dielectric layer 95 can be formed with a thickness of about 10 to 40 μm, for example, and the protective film 96 can be formed with a thickness of about 500 to 800 nm, for example. The dielectric layer 95 may be provided only in the region where the display electrode 91 and the electrode bus 94 are formed.

  The intermediate substrate 85 is formed with at least one through hole (not shown) for exhausting unnecessary gas in the discharge spaces 124 to 126 and enclosing gas necessary for discharge.

  In short, the intermediate substrate 100 includes a glass substrate 101, an address electrode 102 as a third address electrode, a dielectric layer 103, a partition 112, a blue phosphor 83 as a third phosphor, and a third phosphor. The display electrode 105, which is a display electrode, an electrode bus 108, a dielectric layer 109, and a protective film 111 are included.

  The glass substrate 101 on the side facing the intermediate substrate 85 is provided with m address electrodes 102 (the same number as the address electrodes 77 provided on the back plate 75) extending in the scanning direction. Reference numeral 102 is arranged to face the address electrodes 77 provided on the back plate 75.

For the address electrode 102, a transparent electrode material such as ITO or SnO ₂ or a metal electrode material such as Al can be used. The thickness of the address electrode 102 can be formed to, for example, about several μm. In the case where a metal electrode material such as Al is used, the horizontal width L5 of the address electrode 102 may be configured to be not more than half of the horizontal width L3 between the partition walls 112.

  The dielectric layer 103 is formed on the glass substrate 101 so as to cover the address electrodes 102. The dielectric layer 103 is for protecting the address electrode 102. For the dielectric layer 103, a highly transparent material with high reflectivity can be used. Moreover, the thickness of the dielectric material layer 103 can be formed in about 10-40 micrometers, for example.

  On the dielectric layer 103, a plurality of barrier ribs 112 are provided for separating the m address electrodes 102 one by one. The plurality of partition walls 112 are arranged to face the partition walls 79 provided on the back plate 75. Further, the horizontal width L3 between the partition walls 112 is configured to be substantially equal to the width L1 between the partition walls 79 and the width L2 between the partition walls 89.

As the material of the partition 112, a powder made of PbO, B ₂ O ₃ , SiO ₂ or the like into a glass paste can be used. Moreover, the height of the partition 112 can be formed, for example, 90 to 180 μm, and the horizontal width L3 of the partition 112 can be formed, for example, to about 20 to 100 μm. The partition 112 can be formed by a screen printing method or a sand blast method.

The blue phosphor 83 is formed over the dielectric layer 103 and the side wall of the partition 112. For example, BaMgAl ₁₀ O ₁₇ : Eu ²⁺ can be used as the material of the blue phosphor 83. The blue phosphor 83 can be formed by, for example, a screen printing method, an EB vapor deposition method, a CVD method, or the like.

  The glass substrate 101 on the side facing the back plate 75 is provided with n display electrodes 105 extending in the horizontal direction (the same number as the display electrodes 67 provided on the front plate 65) in a strip shape. The display electrode 105 is disposed so as to face the display electrode 91.

The display electrode 105 has a configuration in which a scan electrode 106 and a sustain electrode 107 are paired, and n scan electrodes 106 and n sustain electrodes 107 are provided. Scan electrode 106 and sustain electrode 107 are arranged in parallel to the horizontal direction. The scan electrode 106 and the sustain electrode 107 can be made of, for example, a material such as ITO or SnO _2. The thickness of the scan electrode 106 and the sustain electrode 107 can be about 150 nm, for example.

  The scan electrode 106 and the sustain electrode 107 are each formed with an electrode bus bar 108 extending in the scan direction. The electrode bus 108 is for lowering the resistance value. For example, a material such as Cr—Cu—Cr or Ag can be used for the electrode bus bar 108, and the thickness of the electrode bus bar 108 can be formed to be about several μm, for example. The electrode bus bar 108 is formed by directly exposing a material to be the electrode bus bar 108 containing an etching method or a photosensitive component.

  The dielectric layer 109 is formed so as to cover the glass substrate 101 on the side where the display electrode 105 and the electrode bus 108 are formed, and the display electrode 105 and the electrode bus 108. The protective film 111 is formed so as to cover the dielectric layer 109. As a material for forming the dielectric layer 109 and the protective film 111, a material having high transparency in the visible light emitting region may be used. The dielectric layer 109 can be formed with a thickness of about 10 to 40 μm, for example, and the protective film 111 can be formed with a thickness of about 500 to 800 nm, for example. Note that the dielectric layer 109 may be provided only in a region where the display electrode 105 and the electrode bus bar 108 are formed.

  The intermediate substrate 100 is formed with at least one through hole (not shown) for exhausting unnecessary gas in the discharge spaces 124 to 126 and enclosing the gas necessary for discharge.

  Next, the first discharge element 121 formed by bonding the front plate 65 and the intermediate substrate 85 will be described. A plurality of first discharge elements 121 are formed between the glass substrate 66 and the glass substrate 86, and the horizontal direction between the adjacent first discharge elements 121 is partitioned by a partition wall 89. In short, the first discharge element 121 includes a display electrode 67, an electrode bus 71, a dielectric layer 72, a protective film 73, an address electrode 87, a dielectric layer 88, a discharge space 124, and a red phosphor. 82. The discharge space 124 is formed between the red phosphor 82 and the protective film 73.

  Next, the second discharge element 122 formed by bonding the intermediate substrate 85 and the intermediate substrate 100 will be described. A plurality of the second discharge elements 122 are formed between the glass substrate 86 and the glass substrate 101, and the horizontal direction between the adjacent second discharge elements 122 is partitioned by the partition 112. In short, the second discharge element 122 includes a display electrode 91, an electrode bus 94, a dielectric layer 95, a protective film 96, an address electrode 102, a dielectric layer 103, a discharge space 125, and a blue phosphor. 83. The discharge space 125 is formed between the blue phosphor 83 and the protective film 96.

  Further, in the PDP 60 of the present embodiment, the second discharge element 122 is provided below the first discharge element 121 and is disposed so as to face the first discharge element 121. Therefore, when displaying an image, the light emission of the second discharge element 122 needs to pass through the first discharge element 121 to the glass substrate 66 side of the front plate 65. Therefore, the transmittance in this case Is preferably 50% or more.

  In addition, the thickness of the red phosphor 82 provided in the first discharge element 121 is preferably 10 μm or less so that the light emission of the second discharge element 122 can easily pass through. For example, when the red phosphor 82 having a thickness of 8 μm is formed by screen printing, a transmittance of about 50% can be obtained. For example, when the red phosphor 82 having a thickness of about 0.3 μm to 1.0 μm is formed by the EB vapor deposition method or the CVD method, a transmittance of 90% or more can be obtained.

  Next, the third discharge element 123 formed by bonding the intermediate substrate 100 and the back plate 75 will be described. A plurality of third discharge elements 123 are formed between the glass substrate 101 and the glass substrate 76, and the horizontal direction between the adjacent third discharge elements 123 is partitioned by a partition wall 79. In short, the third discharge element 123 includes the display electrode 105, the electrode bus 108, the dielectric layer 109, the protective film 111, the address electrode 77, the dielectric layer 78, the discharge space 126, and the green phosphor. 81. The discharge space 126 is formed between the green phosphor 81 and the protective film 111. The third discharge element 123 is provided below the second discharge element 122 and is disposed so as to face the second discharge element 122.

  That is, the first discharge element 121 and the second discharge element 122 are stacked above the third discharge element 123 (perpendicular to the surface direction of the front plate 65). Therefore, when displaying an image, it is necessary to allow the light emission of the third discharge element 123 to pass through the first and second discharge elements 121 and 122 to the glass substrate 66 side. The rate is preferably 50% or more.

  Further, the thickness of the blue phosphor 83 is preferably 10 μm or less so that light emitted by the third discharge element 123 can easily pass through to the glass substrate 66 side. For example, when the blue phosphor 83 having a thickness of 8 μm is formed by a screen printing method, a transmittance of about 50% can be obtained. Also, for example, when the blue phosphor 83 having a thickness of about 0.3 μm to 1.0 μm is formed by EB vapor deposition or CVD, a transmittance of 90% or more can be obtained.

  As described above, the PDP 60 of the present embodiment has a configuration in which the first to third discharge elements 121 to 123 having phosphors of different colors are stacked in the Z and Z directions. As a result, the pixel 110 includes first to third discharge elements 121 to 123 stacked in the Z and Z directions.

  As described above, the first to third discharge elements 121 to 123 having phosphors of different colors are stacked in the Z and Z directions so that they can be driven stably, and the resolution of the conventional PDPs 10 and 30 is increased. Compared to the above, the horizontal resolution can be improved three times.

  The PDP 60 configured as described above can use a conventional drive circuit. Therefore, the driving method of the PDP 60 is “large-screen wall-mounted TV-plasma display” (Hiro Murakami, Satoshi Shinoda, Koichi Wada, Corona Co., Ltd. (editor: The Institute of Image Media Science and Technology), first edition, May 10, 2002) The address / display separation method, which is a general driving method of the conventional PDP, as described in Chapter 8 of the above can be used.

Next, a method for driving the first discharge element 121 to which the address / display separation method is applied will be described with an example of the drive waveform of the first discharge element 121 with reference to FIG. FIG. 7 is a diagram showing an example of the drive waveform of the first discharge element in the subfield period. 7A is a voltage pulse waveform of the address electrode 87, FIG. 7B is a voltage pulse waveform of the sustain electrode 69, FIG. 7C is a voltage pulse waveform of the first scan electrode 68-1, and FIG. Is a voltage pulse waveform of the second scan electrode 68-2, (e) is a voltage pulse waveform of the nth scan electrode 68-n, and _tadd is a pulse application time during address discharge (hereinafter, pulse application time _tadd ). , T is the repetition period of the voltage pulse (hereinafter, the repetition period _{T), V SUS} represents the amplitude of the voltage pulse of the scan electrode 68 - 1 to 68-n and the sustain electrodes 69 in the sustain discharge period, respectively.

  As shown in FIG. 7, the subfield period has a reset discharge period, an address discharge period, and a sustain discharge period. In the reset discharge period, reset discharge of the discharge space 124 is performed, and the state of charge accumulated on the surface of the display electrode 67 corresponding to each pixel 110 is made uniform. In the subsequent address discharge period, a voltage pulse for data writing is applied to the scan electrode 68-1, the scan electrode 68-2, ..., the scan electrode 68-n in synchronization with the signal pulse applied to the address electrode 87. Applied sequentially. In this address discharge period, selective write discharge is simultaneously performed on a plurality of first discharge elements 121 corresponding to a predetermined scan electrode 68, whereby all of the first discharge elements 121 are selected within the address discharge period. Write discharge is completed. The selective write discharge is a discharge for selecting the pixel 110 for the sustain discharge, and this discharge is performed between the address electrode 87 and the scan electrodes 68-1 to 68-n.

  In the next sustain discharge period, a voltage pulse having a repetition period T is applied to the sustain electrode 69 and the scan electrodes 68-1 to 68-n, and in the first discharge element 121 selected in the address discharge period, Sustain discharge occurs continuously, and discharge light emission proportional to the gradation of the display image becomes possible. As described above, the first discharge element 121 is driven by a method similar to the conventional method, and the second and third discharge elements 122 and 123 are also driven by a method similar to the first discharge element 121.

FIG. 8 is a diagram showing the relationship between the amplitude of the voltage pulse applied to the display electrode and the luminance. In FIG. 8, V _SUS (RGB) is the amplitude of the voltage pulse applied to the display electrode 22 of the conventional PDP 10 (hereinafter referred to as amplitude V _SUS (RGB)), and V _SUS (R) is the red phosphor 82. V _SUS (B) is the voltage applied to the display electrode 91 of the second discharge element 122 provided with the blue phosphor 83, the amplitude of the voltage pulse applied to the display electrode 67 of the first discharge element 121 provided with The amplitude of the pulse (hereinafter referred to as amplitude V _SUS (B)), V _SUS (G) is the amplitude of the voltage pulse applied to the display electrode 105 of the third discharge element 123 having the green phosphor 81 (hereinafter referred to as “V _SUS (B)”). Amplitude V _SUS (G)) is shown.

Further, in FIG. 8, _{K R} conventional PDP10 red phosphor brightness (hereinafter, referred to as luminance _{K R), K B} conventional PDP10 blue phosphor luminance (hereinafter referred to as luminance _{K B),} K _G conventional PDP10 green phosphor brightness (hereinafter, referred to as luminance _{K G), L R} is the first discharge element 121 luminance (hereinafter referred to as luminance _{L R), L B} is the second discharge luminance of the element 122 (hereinafter referred to as luminance _{L B), L G} denotes the luminance of the third discharge element 123 (hereinafter referred to as luminance _{L G),} respectively.

In the conventional PDP 10, a discharge element having a red phosphor arranged in a horizontal direction, a discharge element having a blue phosphor, and a discharge element having a green phosphor use one display electrode in common. As shown in FIG. 8, since the amplitude V _SUS (RGB) of the voltage pulse applied to the display electrode 22 can be set with only one value, the discharge element having phosphors of different colors it was not possible to adjust the brightness _{K R, K B, K G} each.

Since the first to third discharge elements 121 to 123 provided in the PDP 60 of the present embodiment are each independently provided with an address electrode and a display electrode, the first discharge element is used when sustain discharge is performed. 121 display electrode 67 amplitude V _SUS (R), second discharge element 122 display electrode 91 amplitude V _SUS (B), third discharge element 123 display electrode 105 amplitude V _SUS (G) preparative set separately, the brightness _L R for each discharge element 121 to _123, L B, it is possible to adjust the _{L G.}

As described above, since the first to third discharge elements 121 to 123 provided in the PDP 60 of the present embodiment are each independently provided with the address electrode and the display electrode, when the sustain discharge is performed, the display is performed. by changing the period and amplitude of the voltage pulses applied to the electrodes in each discharge element 121 to 123, the luminance _K R upon each discharge element 121 to 123 emits _light, K B, is possible to adjust the _{K G} and gradation characteristics it can.

  The phosphors (RGB) provided in the first to third discharge elements 121 to 123 only need to have different colors between the first to third discharge elements 121 to 123 stacked in the Z and Z directions. The color of the phosphor provided in each of the discharge elements 121 to 123 is not limited to the form of the present embodiment. The PDP 60 of this embodiment can also be applied to the PDP 30 shown in FIG. 3 and the PDP in which a protruding partition is provided on the front plate 41 of the PDP 30 shown in FIG.

(Second embodiment)
A PDP 130 according to a second embodiment of the present invention will be described with reference to FIGS. 9 is an exploded perspective view of a PDP according to a second embodiment of the present invention, FIG. 10 is a view of the PDP shown in FIG. 9 assembled and viewed from B, and FIG. 11 is a view of the PDP shown in FIG. FIG. 9 to 11, the Y and Y directions are the scanning direction (the extending direction of the address electrodes 137 and 147), and the X and X directions are the horizontal directions (the display electrodes 67 and 152) orthogonal to the scanning direction. The Z and Z directions indicate directions orthogonal to the surface direction of the front plate 65, respectively. 9 to 11, the same components as those of the PDP 60 shown in FIG.

  The PDP 130 includes a first discharge element 161, a second discharge element 162, and a third discharge element 163, roughly speaking, a front plate 65 that is a first substrate and a spine that is a second substrate. The structure includes a face plate 135, an intermediate substrate 145 as a third substrate, and a drive control device (not shown).

  The drive control device is for performing drive control of the PDP 130. The front plate 65 is disposed so as to face the back plate 135, and the intermediate substrate 145 is disposed between the front plate 65 and the back plate 135. The PDP 130 is provided with n scanning lines 70 (n is a natural number).

  The back plate 135 includes a glass substrate 138, an address electrode 137 that is a first address electrode, a dielectric layer 139, a partition 140, a blue phosphor 141 that is a first phosphor, and a second phosphor. And a green phosphor 142.

  On the glass substrate 138 on the side facing the intermediate substrate 145, m address electrodes 137 (m is a natural number) extending in the scanning direction are formed. For example, a metal material such as Al can be used for the address electrode 137, and the thickness of the address electrode 137 can be formed to about several μm, for example. The dielectric layer 139 is provided on the glass substrate 138 so as to cover the address electrodes 137. The dielectric layer 139 is for protecting the address electrode 137. For the dielectric layer 139, it is preferable to use a material having high reflectivity and high transparency. For example, a white dielectric paste film can be used. The dielectric layer 139 can be formed to a thickness of about 10 to 40 μm, for example.

A plurality of barrier ribs 140 are provided on the dielectric layer 139 to separate the m address electrodes 137 one by one. The barrier ribs 140 are arranged such that the horizontal (X, X direction) widths L6 and L7 of the second and third 162 and 163 are substantially half of the horizontal width L8 of the first discharge element 161. Yes. As a material of the partition 140, for example, a powder made of PbO, B ₂ O ₃ , SiO ₂ or the like powdered into a glass paste can be used. The height of the partition 140 can be, for example, 90 to 180 μm, and the width L6 of the partition 140 can be, for example, about 20 to 100 μm. The partition 140 can be formed by a screen printing method or a sand blast method.

The blue phosphor 141 and the green phosphor 142 are alternately provided in the horizontal direction so as to extend over the dielectric layer 139 and the side wall of the partition 140. For example, BaMgAl ₁₀ O ₁₇ : Eu ²⁺ can be used as the material of the blue phosphor 141, and Zn ₂ SiO ₄ : Mn ²⁺ can be used as the material of the green phosphor 142. Further, the blue phosphor 141 and the green phosphor 142 can be formed to a thickness of, for example, about 10 to 20 μm by screen printing.

  The back plate 135 is formed with at least one through hole (not shown) for exhausting unnecessary gas in discharge spaces 164 to 166 to be described later and for enclosing gas necessary for discharge. . This through hole may be provided in the front plate 65.

  In short, the intermediate substrate 145 includes a glass substrate 146, an address electrode 147 that is a second address electrode, a dielectric layer 148, a partition 151, a red phosphor 143 that is a third phosphor, and a second phosphor. The display electrode 152, which is a display electrode, an electrode bus 156, a dielectric layer 157, and a protective film 158 are provided.

  The glass substrate 146 on the side facing the front plate 65 is provided with address electrodes 147 that are half the number of address electrodes 137 provided on the back plate 135 so as to extend in the scanning direction. The arrangement pitch of the address electrodes 147 is configured to be approximately twice as large as the arrangement pitch of the address electrodes 137 provided on the back plate 135.

For the address electrode 147, a transparent electrode material such as ITO or SnO ₂ or a metal electrode material such as Al can be used, and the thickness of the address electrode 147 can be formed to about several μm, for example. Further, when a metal electrode material such as Al is used as the material of the address electrode 147, the horizontal width L9 of the address electrode 147 is ¼ or less of the horizontal width of the red phosphor 143. It may be configured as follows.

  The dielectric layer 148 is formed on the glass substrate 146 so as to cover the address electrodes 147. The dielectric layer 148 is for protecting the address electrode 147. The dielectric layer 148 can be formed using a highly reflective material with high reflectivity. Moreover, the thickness of the dielectric material layer 148 can be formed to about 10-40 micrometers, for example.

On the dielectric layer 148, a plurality of partition walls 151 for separating the plurality of address electrodes 147 one by one are provided. As a material for the partition wall 151, a powder made of PbO, B ₂ O ₃ , SiO ₂ or the like into a glass paste can be used. Moreover, the height of the partition wall 151 can be formed, for example, to 90 to 180 μm, and the horizontal width between the partition walls 151 can be formed, for example, to about 20 to 200 μm. The partition wall 151 can be formed by a screen printing method or a sand blast method.

The red phosphor 143 is formed over the dielectric layer 148 and the side wall of the partition wall 151. For example, (Y, Gd) BO ₃ : Eu ³⁺ can be used as the material of the red phosphor 143. The red phosphor 143 can be formed by, for example, a screen printing method, an EB vapor deposition method, a CVD method, or the like.

  On the glass substrate 146 on the side facing the back plate 135, n display electrodes 152 (the same number as the display electrodes 67 provided on the front plate 65) extending in the horizontal direction face the display electrode 67. Is provided.

The display electrode 152 has a configuration in which a scan electrode 153 and a sustain electrode 154 are paired, and n scan electrodes 153 and n sustain electrodes 154 are provided. Scan electrode 153 and sustain electrode 154 are arranged in parallel to the horizontal direction. For example, ITO or SnO ₂ can be used as the material of the scan electrode 153 and the sustain electrode 154, and the thickness of the scan electrode 153 and the sustain electrode 154 can be formed to about 150 nm, for example.

  The electrode bus 156 is provided on the scan electrode 153 and the sustain electrode 154 so as to extend in the scan direction. The electrode bus 156 is for lowering the resistance value. For example, a material such as Cr—Cu—Cr or Ag can be used for the electrode bus 156, and the thickness of the electrode bus 156 can be formed to be about several μm, for example. The electrode bus bar 156 can be formed by an etching method or by directly exposing a material to be the electrode bus bar 156 containing a photosensitive component.

  The dielectric layer 157 is formed so as to cover the surface of the glass substrate 146 on which the display electrode 152 and the electrode bus 156 are formed, and the display electrode 152 and the electrode bus 156. The protective film 158 is formed so as to cover the dielectric layer 157. The dielectric layer 157 and the protective film 158 may be formed using a material that has high transparency in the visible light emitting region. The dielectric layer 157 can be formed to a thickness of, for example, about 10 to 40 μm, and the protective film 158 can be formed to a thickness of, for example, about 500 to 800 nm. Note that the dielectric layer 157 may be provided only in a region where the display electrode 152 and the electrode bus 156 are formed.

  The intermediate substrate 145 is formed with at least one through hole (not shown) for exhausting unnecessary gas in the discharge spaces 164 to 166 and enclosing gas necessary for discharge.

  Next, with reference to FIGS. 10 and 11, the first discharge element 161 formed by bonding the front plate 65 and the intermediate substrate 145 will be described.

  The first discharge element 161 is formed between the glass substrate 66 and the glass substrate 146, and the horizontal direction between the first discharge elements 161 is partitioned by the partition 151. In short, the first discharge element 161 includes a display electrode 67, an electrode bus 71, a dielectric layer 72, a protective film 73, an address electrode 147, a dielectric layer 148, a red phosphor 143, and a discharge space. 164. The discharge space 164 is formed between the red phosphor 143 and the protective film 73. The horizontal width L8 of the first discharge element 161 is configured to be approximately twice as large as the horizontal widths L6 and L7 (L6 = L7) of the second and third discharge elements 162 and 163. ing.

  Next, with reference to FIGS. 10 and 11, the second and third discharge elements 162 and 163 formed by bonding the intermediate substrate 145 and the back plate 135 will be described.

  The second and third discharge elements 162 and 163 are formed between the glass substrate 138 and the glass substrate 146, and the second discharge element 162 and the third discharge element 163 are arranged in the horizontal direction (X, X (Direction). The horizontal direction between the second and third discharge elements 162 and 163 is partitioned by the barrier rib 140.

  In short, the second discharge element 162 includes a display electrode 152, an electrode bus 156, a dielectric layer 157, a protective film 158, an address electrode 137, a dielectric layer 139, a blue phosphor 141, and a discharge space. 165. The discharge space 165 is formed between the blue phosphor 141 and the protective film 158. The horizontal width L6 of the second discharge element 162 is configured to be approximately half the size of the horizontal width L8 of the first discharge element 161.

  In short, the third discharge element 163 includes a display electrode 152, an electrode bus 156, a dielectric layer 157, a protective film 158, an address electrode 137, a dielectric layer 139, a green phosphor 142, a discharge space. 166. The discharge space 166 is formed between the green phosphor 142 and the protective film 158. The horizontal width L7 of the third discharge element 163 is configured to be substantially equal to the horizontal width L6 of the second discharge element 162 (L6 = L7). The second and third discharge elements 162 and 163 are opposed to the first discharge element 161 with the glass substrate 146 interposed therebetween. The pixel 160 includes second and third discharge elements 162 and 163, and a first discharge element 161 that faces the second and third discharge elements 162 and 163 above the second and third discharge elements 162 and 163.

  As described above, in the PDP 130 of the present embodiment, the horizontal width L8 above the glass substrate 146 is approximately twice the widths L6 and L7 of the second and third discharge elements 162 and 163. The discharge element 161 is provided, and the second and third discharge elements 162 and 163 facing the first discharge element 161 are provided below the glass substrate 146. Therefore, when displaying an image, it is necessary to allow the light emitted by the second and third discharge elements 162 and 163 to pass through the first discharge element 161 to the glass substrate 66 side. The rate is preferably 50% or more.

  In addition, the thickness of the red phosphor 143 may be set to 10 μm or less so that light emitted from the second and third discharge elements 162 and 163 can easily pass through the glass substrate 66 side. For example, when the red phosphor 143 having a thickness of 8 μm is formed by screen printing, a transmittance of about 50% can be obtained. For example, when the red phosphor 143 having a thickness of about 0.3 μm to 1.0 μm is formed by an EB vapor deposition method or a CVD method, a transmittance of 90% or more can be obtained.

  As described above, the first to third discharge elements 161 to 163 including the phosphors 141 to 143 having different colors are provided, and the first discharge element 161 is opposed to the first discharge element 161 under the first discharge element 161. By arranging the second and third discharge elements 162 and 163, it is possible to drive stably and to improve the horizontal resolution by 1.5 times compared to the resolution of the conventional PDP 10 and 30. it can.

  The PDP 130 having the above-described configuration can use a conventional driving circuit. Therefore, the driving method of the PDP 130 is “large screen wall-mounted TV-plasma display” (Hiroshi Murakami, Satoshi Shinoda, Koichi Wada, Corona Co., Ltd. (editor: The Institute of Image Media Science and Technology), first edition, May 10, 2002) The address / display separation method, which is a general driving method of the conventional PDP, as described in Chapter 8 of the above can be used.

  In the PDP 130 of the present embodiment, the address electrode 147 and the display electrode 67 of the first discharge element 161 and the address electrode 137 and the display electrode 152 of the second and third discharge elements 162 and 163 are separately provided. Therefore, during sustain discharge, the period and amplitude of the voltage pulse applied to the display electrode 67 of the first discharge element 161 and the voltage pulse applied to the display electrode 152 of the second and third discharge elements 162 and 163 The light emission characteristics (luminance, gradation characteristics, etc.) of the first discharge element 161 and the light emission characteristics (luminance, gradation characteristics, etc.) of the second and third discharge elements 162, 163 are changed. And can be adjusted.

  Note that the phosphors (RGB) provided in the first to third discharge elements 161 to 163 need only have different colors in the respective discharge elements 161 to 163, and the first to third discharge elements 161 to 161 are different. The color of the phosphor provided in 163 is not limited to the embodiment. Further, the PDP 130 of the present embodiment can be applied to the PDP 30 shown in FIG. 3 and the PDP in which a protruding partition is provided on the front plate 41 of the PDP 30 shown in FIG.

  FIG. 12 is a cross-sectional view of a PDP according to a first modification of the second embodiment.

  As shown in FIG. 12, the PDP 210 includes two second discharge elements 162 and two third discharge elements such that the second and third discharge elements 162 and 163 face the first discharge element 161. 163 is configured in the same manner as the PDP 130 of the second embodiment except that 163 is alternately arranged in the X and X directions. As described above, the second and third discharge elements 162 and 163 may be arranged with respect to the first discharge element 161. In the PDP 210 having such a configuration, the same effect as that of the PDP 130 of the second embodiment can be obtained.

  FIG. 13 is a cross-sectional view of a PDP according to a second modification of the second embodiment.

  As shown in FIG. 13, the PDP 215 includes a second discharge element 162 and a third discharge element 162 so that one second discharge element 162 and one third discharge element 162 correspond to one first discharge element 161, respectively. The configuration is the same as the PDP 130 of the second embodiment except that 163 is randomly arranged in the X and X directions. As described above, the second and third discharge elements 162 and 163 may be arranged with respect to the first discharge element 161. Even in the PDP 215 configured as described above, the same effect as that of the PDP 130 of the second embodiment can be obtained.

  FIG. 14 is a cross-sectional view of a PDP according to a third modification of the second embodiment.

  As shown in FIG. 14, the PDP 220 includes the second discharge element 162 such that the sum of the widths L6 and L7 of the second and third discharge elements 162 and 163 is equal to the width L8 of the first discharge element 161. The width L6 is made smaller than the width L7 of the third discharge element 163, and the width L10 of the address electrode 137-1 corresponding to the second discharge element 162 is set to a third value so as to correspond to the magnitude relationship between the widths L6 and L7. Except for being smaller than the width L11 of the address electrode 137-2 corresponding to the discharge element 163, the configuration is the same as the PDP 130 of the second embodiment. As described above, the width L6 of the second discharge element 162 and the width L7 of the third discharge element 163 may be different. Even in the PDP 220 having such a configuration, the same effect as that of the PDP 130 of the second embodiment can be obtained.

  FIG. 15 is a cross-sectional view of a PDP according to a fourth modification of the second embodiment.

  As shown in FIG. 15, the PDP 225 includes the second discharge element 162 such that the sum of the widths L6 and L7 of the second and third discharge elements 162 and 163 is equal to the width L8 of the first discharge element 161. The width L6 is larger than the width L7 of the third discharge element 163, and the width L10 of the address electrode 137-1 corresponding to the second discharge element 162 is set to the third length so as to correspond to the magnitude relationship between the widths L6 and L7. Except for being larger than the width L11 of the address electrode 137-2 corresponding to the discharge element 163, the configuration is the same as the PDP 130 of the second embodiment. As described above, the width L6 of the second discharge element 162 and the width L7 of the third discharge element 163 may be different. Even in the PDP 225 configured as described above, the same effect as the PDP 130 of the second embodiment can be obtained.

  The width L6 of the second discharge element 162 is different from the width L7 of the third discharge element 163, and the second and third discharge elements 162 and 163 having different widths are arranged as shown in FIGS. You may let them.

(Third embodiment)
A PDP 170 according to a third embodiment of the present invention will be described with reference to FIGS. 16 is an exploded perspective view of a PDP according to a third embodiment of the present invention, FIG. 17 is a view of the PDP shown in FIG. 16 assembled and viewed from B, and FIG. 18 is a view of the PDP shown in FIG. FIG. 16 to 18, the Y and Y directions are scanning directions (extending directions of the address electrodes 177 and 187), and the X and X directions are horizontal directions (display electrodes 67 and 191) perpendicular to the scanning directions. The Z and Z directions indicate directions orthogonal to the surface direction of the front plate 65, respectively. In FIG. 16 to FIG. 18, the same components as those of the PDP 60 shown in FIG.

  The PDP 170 includes a first discharge element 203, a second discharge element 202, and a third discharge element 201, roughly speaking, a front plate 65 that is a first substrate and a back plate that is a second substrate. The structure includes a face plate 175, an intermediate substrate 185 as a third substrate, and a drive control device (not shown).

  The drive control device is for performing drive control of the PDP 170. The front plate 65 is disposed so as to face the back plate 175, and the intermediate substrate 185 is disposed between the front plate 65 and the back plate 175. The PDP 170 is provided with n scanning lines 70 (n is a natural number).

  The back plate 175 generally includes a glass substrate 176, an address electrode 177 that is a first address electrode, a dielectric layer 178, a partition 179, and a red phosphor 181 that is a first phosphor. It is said that.

  On the glass substrate 176 facing the intermediate substrate 185, half the number of address electrodes 177 provided on the intermediate substrate 185 are provided so as to extend in the scanning direction. The installation pitch is set to be approximately twice the arrangement pitch of the address electrodes 187 provided on the intermediate substrate 185. For example, a metal material such as Al can be used for the address electrode 177, and the thickness of the address electrode 177 can be formed to be about several μm, for example.

  The dielectric layer 178 is provided on the glass substrate 176 so as to cover the address electrodes 177. The dielectric layer 178 is for protecting the address electrode 177. For the dielectric layer 178, it is preferable to use a highly reflective material with high reflectivity. For example, a white dielectric paste film can be used. The thickness of the dielectric layer 178 can be formed to about 10 to 40 μm, for example.

  A plurality of partition walls 179 are provided on the dielectric layer 178 to separate the plurality of address electrodes 177 one by one. The horizontal width between the partition walls 179 is set to be approximately twice the horizontal width between the partition walls 189.

As a material of the partition wall 179, a material obtained by forming a powder of PbO, B ₂ O ₃ , SiO ₂ or the like into a glass paste can be used. The height of the partition 179 can be formed, for example, 90 to 180 μm, and the horizontal width between the partitions 179 can be formed, for example, to about 20 to 200 μm. The partition 179 can be formed by a screen printing method or a sand blast method.

The red phosphor 181 is formed over the dielectric layer 178 and the side wall of the partition 179. The red phosphor 181 can be formed by, for example, a screen printing method, an EB vapor deposition method, a CVD method, or the like. For example, (Y, Gd) BO ₃ : Eu ³⁺ can be used as the material of the red phosphor 181.

  In general, the intermediate substrate 185 includes a glass substrate 186, an address electrode 187 as a second address electrode, a dielectric layer 188, a partition 189, a blue phosphor 182 as a second phosphor, and a third fluorescence. The green phosphor 183, which is a body, a display electrode 191, an electrode bus 194, a dielectric layer 195, and a protective film 196 are provided.

On the glass substrate 186 facing the front plate 65, m address electrodes 187 (m is a natural number) extending in the scanning direction are formed. For the address electrode 187, a transparent electrode material such as ITO or SnO ₂ or a metal electrode material such as Al can be used, and the thickness of the address electrode 187 can be formed to about several μm, for example. In the case where a metal electrode material such as Al is used, the horizontal width L15 of the address electrode 187 is preferably less than half of the horizontal width between the partition walls 189.

  The dielectric layer 188 is provided on the glass substrate 186 so as to cover the address electrodes 187. The dielectric layer 188 is for protecting the address electrode 187. For the dielectric layer 188, a material having high reflectivity and high transparency is preferably used. The dielectric layer 188 can be formed to a thickness of about 10 to 40 μm, for example.

The dielectric layer 188 is provided with a plurality of partition walls 189 for separating the plurality of address electrodes 187 one by one. The partition walls 189 are arranged such that the horizontal width between the partition walls 189 is approximately half the horizontal width between the partition walls 179. As a material of the partition wall 189, for example, a powder obtained by forming a powder of PbO, B ₂ O ₃ , SiO ₂ or the like into a glass paste can be used. The partition 189 can be formed by a screen printing method or a sand blast method, and the height of the partition 189 can be, for example, 90 to 180 μm, and the width of the partition 189 can be, for example, about 20 to 100 μm.

The blue phosphor 182 and the green phosphor 183 are alternately provided over the dielectric 188 located between the barrier ribs 189 and the side walls of the barrier ribs 189. For example, BaMgAl ₁₀ O ₁₇ : Eu ²⁺ can be used as the material of the blue phosphor 182. For example, Zn ₂ SiO ₄ : Mn ²⁺ can be used as the material of the green phosphor 183. The blue phosphor 182 and the green phosphor 183 are formed by, for example, a screen printing method, an EB vapor deposition method, a CVD method, or the like.

  On the glass substrate 186 on the side facing the back plate 175, n display electrodes 191 (the same number as the display electrodes 67 provided on the front plate 65) extending in the horizontal direction are provided on the front plate 65. It is provided so as to face the display electrode 67.

The display electrode 191 has a configuration in which a scan electrode 192 and a sustain electrode 193 are paired, and n scan electrodes 192 and n sustain electrodes 193 are provided. Further, the scan electrode 192 and the sustain electrode 193 are arranged to be parallel to each other in the horizontal direction. As a material of the scan electrode 192 and the sustain electrode 193, for example, ITO, SnO ₂ or the like can be used. In addition, the thicknesses of the scan electrode 192 and the sustain electrode 193 can be set to about 150 nm, for example.

  The electrode bus 194 is provided on the scan electrode 192 and the sustain electrode 193 and extends in the scan direction. The electrode bus 194 is for lowering the resistance value. For example, a material such as Cr—Cu—Cr or Ag can be used as the material of the electrode bus bar 194, and the thickness of the electrode bus bar 194 can be formed to be about several μm, for example. The electrode bus 194 is formed by, for example, an etching method or by directly exposing a material to be the electrode bus 194 containing a photosensitive component.

  The dielectric layer 195 is formed so as to cover the surface of the glass substrate 186 on which the display electrode 191 and the electrode bus 194 are formed, and the display electrode 191 and the electrode bus 194. The protective film 196 is formed so as to cover the dielectric layer 195. As a material for the dielectric layer 195 and the protective film 196, a material having high transparency in the visible light emitting region may be used. The thickness of the dielectric layer 195 can be formed to about 10 to 40 μm, for example. Moreover, the thickness of the protective film 196 can be formed to about 500 to 800 nm, for example. Note that the dielectric layer 195 and the protective film 196 may be provided only in a region where the display electrode 191 and the electrode bus 194 are formed.

  The intermediate substrate 185 is formed with at least one through hole (not shown) for exhausting unnecessary gas in the discharge spaces 204 to 206 and enclosing gas necessary for discharge.

  Next, the second and third discharge elements 201 and 202 formed by bonding the front plate 65 and the intermediate substrate 185 will be described with reference to FIGS. 17 and 18. The second and third discharge elements 201 and 202 are formed between the glass substrate 66 and the glass substrate 186, and a partition wall is provided between the second and third discharge elements 201 and 202. 189 is formed. Further, the second discharge elements 201 and the third discharge elements 202 are alternately arranged in the horizontal direction.

  In short, the second discharge element 201 includes a display electrode 67, an electrode bus 71, a dielectric layer 72, a protective film 73, an address electrode 187, a dielectric layer 188, a blue phosphor 182 and a discharge space. 204. The discharge space 204 is formed between the blue phosphor 182 and the protective film 73. The horizontal width L13 of the second discharge element 201 is configured to be approximately half of the horizontal width L12 of the first discharge element 203.

  In short, the third discharge element 202 includes a display electrode 67, an electrode bus 71, a dielectric layer 72, a protective film 73, an address electrode 187, a dielectric layer 188, a green phosphor 183, a discharge space. 205. The discharge space 205 is formed between the blue phosphor 183 and the protective film 73. The horizontal width L14 of the third discharge element 202 is configured to be approximately half of the horizontal width L12 of the first discharge element 203.

  Next, the first discharge element 203 formed by bonding the intermediate substrate 185 and the back plate 175 will be described with reference to FIGS. The first discharge element 203 is formed between the glass substrate 186 and the glass substrate 176, and the third discharge elements 203 arranged in the horizontal direction are partitioned by a partition 179. In short, the third discharge element 203 includes a display electrode 191, an electrode bus 194, a dielectric layer 195, a protective film 196, an address electrode 177, a dielectric layer 178, a red phosphor 181 and a discharge space. 206. The discharge space 206 is formed between the red phosphor 181 and the protective film 196. The horizontal width L12 of the first discharge element 203 is set to be approximately twice as large as the horizontal widths L13 and L14 of the second and third discharge elements 201 and 202.

  The first discharge element 203 is disposed so as to face the second and third discharge elements 201 and 202 with the glass substrate 186 interposed therebetween. The pixel 200 includes a first discharge element 203 and second and third discharge elements 201 and 202 provided above the first discharge element 203 so as to face the first discharge element 203.

  As described above, in the PDP 170 of this embodiment, the horizontal width L12 below the glass substrate 186 is approximately twice the horizontal widths L13 and L14 of the second and third discharge elements 201 and 202. The first discharge element 203 is provided, and the second and third discharge elements 201 and 202 provided above the glass substrate 186 are opposed to the first discharge element 203. Therefore, when displaying an image, it is necessary to transmit the light emitted by the first discharge element 203 to the glass substrate 66 side through the second and third discharge elements 201 and 202. The rate is preferably 50% or more.

  In addition, the thicknesses of the blue phosphor 182 and the green phosphor 183 are preferably 10 μm or less so that light emitted from the first discharge element 203 can easily pass through the glass substrate 66 side. For example, when the blue phosphor 182 and the green phosphor 183 having a thickness of 8 μm are formed using a screen printing method, a transmittance of about 50% can be obtained. Further, for example, when the blue phosphor 182 and the green phosphor 183 having a thickness of about 0.3 μm to 1.0 μm are formed by using the EB vapor deposition method or the CVD method, a transmittance of 90% or more can be obtained. it can.

  As described above, the first to third discharge elements 201 to 203 having phosphors of different colors are provided, and the second and third discharge elements 203 are disposed above the first discharge element 203 so as to face the first discharge element 203. By disposing the third discharge elements 201 and 202, it is possible to drive stably, and the horizontal resolution can be improved by 1.5 times compared with the resolution of the conventional PDPs 10 and 30.

  The PDP 170 having the above configuration can use a conventional driving circuit. Therefore, the driving method of the PDP 170 is “large-screen wall-mounted TV-plasma display” (Hiro Murakami, Satoshi Shinoda, Koichi Wada, Corona Co., Ltd. (editor: The Institute of Image Media Science and Technology), first edition, May 10, 2002) The address / display separation method, which is a general driving method of the conventional PDP, as described in Chapter 8 of the above can be used.

  Further, in the PDP 170 of this embodiment, the address electrode 187 and the display electrode 67 of the second and third discharge elements 201 and 202 and the address electrode 177 and the display electrode 191 of the first discharge element 203 are provided separately. Therefore, when the sustain discharge is performed, the period and amplitude of the voltage pulse applied to the display electrodes 67 of the second and third discharge elements 201 and 202 and the voltage pulse applied to the display electrode 191 of the first discharge element 203. The emission characteristics (luminance, gradation characteristics, etc.) of the second and third discharge elements 201, 202 and the emission characteristics (luminance, gradation characteristics, etc.) of the third discharge element 203 are changed. And can be adjusted.

  Note that the phosphors (RGB) provided in the first to third discharge elements 201 to 203 need only have different colors for each of the discharge elements 201 to 203, and the phosphors of the first to third discharge elements 201 to 203 are required. The color of the phosphor provided in each is not limited to this embodiment. Further, the PDP 170 of the present embodiment can be applied to the PDP 30 shown in FIG. 3 and the PDP in which a protruding partition is provided on the front plate 41 of the PDP 30 shown in FIG.

  Moreover, you may comprise the 2nd and 3rd discharge elements 201 and 202 like the 2nd and 3rd discharge elements 162 and 163 demonstrated in previous FIGS.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications, within the scope of the gist of the present invention described in the claims, It can be changed.

  The present invention can be applied to a plasma display panel that can be stably driven, can improve the resolution of a displayed image, and can adjust luminance and gradation characteristics.

It is a perspective view of prior art PDP. It is the figure which looked at A PDP shown in FIG. It is a disassembled perspective view of another conventional PDP. 1 is an exploded perspective view of a PDP according to a first embodiment of the present invention. It is the figure which assembled the PDP shown in FIG. It is the figure which assembled the PDP shown in FIG. It is the figure which showed an example of the drive waveform of the 1st discharge element in a subfield period. It is the figure which showed the relationship between the amplitude of the voltage pulse applied to a display electrode, and a brightness | luminance. FIG. 5 is an exploded perspective view of a PDP according to a second embodiment of the present invention. FIG. 10 is a view of the assembled PDP shown in FIG. FIG. 10 is a view of the PDP shown in FIG. It is sectional drawing of PDP which concerns on the 1st modification of 2nd Example. It is sectional drawing of PDP which concerns on the 2nd modification of 2nd Example. It is sectional drawing of PDP which concerns on the 3rd modification of 2nd Example. It is sectional drawing of PDP which concerns on the 4th modification of 2nd Example. FIG. 6 is an exploded perspective view of a PDP according to a third embodiment of the present invention. It is the figure which assembled the PDP shown in FIG. It is the figure which assembled the PDP shown in FIG.

Explanation of symbols

10, 30, 60, 130, 170, 210, 215, 220, 225 PDP
11, 31, 75, 135, 175 Back plate 12, 21, 32, 42, 66, 76, 86, 101, 138, 146, 176, 186 Glass substrate 13, 33, 77, 87, 102, 137, 137- 1,137-2,147,177,187 Address electrodes 14,25,34,47,72,78,88,95,103,109,139,148,157,178,188,195 Dielectric layers 15,35 79, 89, 112, 140, 151, 179, 189 Partition 16, 36 Phosphor 16A, 36A, 82, 143, 181 Red phosphor 16B, 36B, 83, 141, 182 Blue phosphor 16C, 36C, 81, 142,183 Green phosphor 17,124,125,126,164-166,204-206 Discharge space 19,41,65 Front 20, 20A to 20C Discharge element 22, 43, 67, 91, 105, 152, 191 Display electrode 22A, 45, 68, 92, 106, 153, 192 Scan electrode 22B, 44, 69, 93, 107, 154, 193 Sustain electrode 23, 46, 71, 94, 108, 156, 194 Electrode bus line 24, 110, 160, 200 Pixel 26, 48, 73, 96, 111, 158, 196 Protective film 27, 49, 70 Scan line 85, 100 , 145, 185 Intermediate substrate 121, 161, 203 First discharge element 122, 162, 201 Second discharge element 123, 163, 202 Third discharge element L1-L15 Width t _add pulse application time T Repeat period K _{R , K B, K G, L} R, L B, L G luminance _{V SUS, V SUS (RGB)} , V SUS (R _{, V SUS (B), V} SUS (G) amplitude

Claims (4)

A first substrate having a first display electrode formed in a direction orthogonal to the scanning direction;
A second substrate comprising: first address electrodes formed in the scanning direction; and first and second phosphors formed in the scanning direction and alternately arranged in a direction orthogonal to the scanning direction. When,
A third phosphor disposed between the first substrate and the second substrate, and a second address electrode orthogonal to the first display electrode on the first substrate side; And a third substrate provided with a second display electrode formed in a direction orthogonal to the scanning direction,
The first display electrode and the second display electrode are arranged so as to overlap in a direction perpendicular to the surface direction of the first substrate, and the colors of the first to third phosphors are made different from each other,
A first discharge element having a third phosphor between the first substrate and the third substrate; and the first fluorescence between the second substrate and the third substrate. A second discharge element including a body and a third discharge element including the second phosphor, and the first discharge element, the second discharge element, and the third discharge element are connected to the first discharge element. A plasma display panel, wherein the plasma display panel is arranged so as to overlap in a direction perpendicular to a surface direction of a substrate. A first substrate having a first display electrode formed in a direction orthogonal to the scanning direction;
A second substrate comprising a first address electrode and a first phosphor formed in the scanning direction;
A second address electrode which is disposed between the first substrate and the second substrate and which is orthogonal to the first display electrode on the first substrate side; and is formed in the scanning direction; and the scanning direction And a second substrate having a second display electrode formed in a direction perpendicular to the scanning direction on the other side, and second and third phosphors alternately arranged in a direction perpendicular to the scanning direction And
The first display electrode and the second display electrode are arranged so as to overlap in a direction perpendicular to the surface direction of the first substrate, and the colors of the first to third phosphors are made different from each other,
A first discharge element including a first phosphor between the second substrate and the third substrate; and a second phosphor between the first substrate and the third substrate. And a third discharge element including a third phosphor, and the first discharge element and the second and third discharge elements are provided on the first substrate. A plasma display panel, wherein the plasma display panel is disposed so as to be perpendicular to a surface direction. When sustaining the first to third discharge elements, the period of the pulses applied to the first and second display electrodes is set to the first discharge element and the second and third discharge elements. the plasma display panel of claim 1 or 2, characterized in that set, respectively. When the first to third discharge elements are subjected to the sustain discharge, the amplitude of a pulse applied to the first and second display electrodes is changed between the first discharge element and the second and third discharge elements. the plasma display panel according to any one of claims 1 to 3, characterized in that respectively set for.

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