JP2008171738A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a PDP which performs luminance display using facing discharge, wherein the luminance display quality can be improved. <P>SOLUTION: Within each of discharge cells C in the PDP, widening portions D (R) b, D (R) c, D (G) b and D (G) c are formed at the area facing a row electrode Y on a required column electrode among many column electrodes D (R), D (G) and D (B) which are used for generating facing discharge between one row electrode Y of a pair of row electrodes (X, Y) through a discharge space. The areas of those widening portions D (R) b, D (R) c, D (G) b and D (G) c are set up to be different corresponding to positions of the discharge cells C on the panel surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electrode configuration of a plasma display panel.

  In recent years, a plasma display panel (hereinafter referred to as a PDP) performs luminance gradation display by surface discharge performed between row electrodes constituting a pair of row electrodes, as well as facing performed between row electrodes and column electrodes. Some have been developed that also perform discharge.

  However, in general, in the PDP, the in-plane distribution of the discharge intensity of the panel surface discharge and the counter discharge is different, and the discharge intensity varies in the panel surface in the counter discharge.

  This in-plane variation of the counter discharge is presumed to be caused by spots in the panel surface of the secondary electron emission characteristics of the MgO layer formed on the dielectric layer covering the row electrode pair. There is a tendency that the intensity of the counter discharge generated in the central portion of the display area of the panel is weaker than that of the peripheral portion.

  Therefore, in the case of a PDP in which such luminance gradation display is performed not only by the surface discharge between the row electrodes but also by the counter discharge between the row electrodes and the column electrodes, due to variations in the discharge intensity of the counter discharge within the panel surface. For example, there arises a problem that display quality such as black luminance is deteriorated.

  In the conventional PDP, the area of the column electrode facing the row electrode is different among red, green, and blue discharge cells (see, for example, Patent Document 1), and the width of the column electrode is wide at the periphery of the panel. However, the former PDP has discharge characteristics caused by differences in charging characteristics among the colors of the red, green, and blue fluorescent materials forming the phosphor layer in the discharge cell. The latter PDP is intended to prevent the occurrence of erroneous discharge and non-occurrence of discharge due to the positional accuracy of the column electrode with respect to the discharge cell at the periphery of the display area of the panel. .

  For this reason, in any of the conventional PDPs, depending on the respective configurations, in-plane variation in the discharge intensity of the counter discharge in the PDP in which the luminance gradation display as described above is performed by the counter discharge between the row electrode and the column electrode. The problem of the deterioration in the quality of the luminance display caused by this cannot be solved.

JP 2003-16944 A JP 2006-216254 A

  One of the technical problems of the present invention is to solve the conventional problems in the PDP in which the luminance gradation display as described above is performed by the counter discharge between the row electrode and the column electrode.

  In order to achieve the above object, the PDP according to the present invention (the first aspect of the present invention) has a panel surface constituted by a first substrate and a second substrate that are opposed to each other through a discharge space, and a rear surface of the first substrate. A plurality of row electrode pairs extending in the row direction on the side and arranged in parallel in the column direction, and extending in the column direction and arranged in parallel in the row direction on the side of the second substrate facing the first substrate. A plurality of column electrodes for forming a unit light emitting region in each of the intersecting discharge spaces and generating a counter discharge through the discharge space with one row electrode of the row electrode pair in each unit light emitting region In the provided PDP, the area of the portion of the plurality of column electrodes arranged in parallel in the row direction that faces one row electrode of the required column electrode corresponds to the position in the panel surface of the unit light emitting region. Are set to different sizes. It is set to.

  In the PDP according to the present invention, a panel surface is constituted by a front glass substrate and a rear glass substrate which are opposed to each other through a discharge space, and a plurality of row electrodes extending in the row direction on the rear side of the front glass substrate and arranged in parallel in the column direction. Each pair of discharge cells is formed in a discharge space in a portion extending in the column direction and juxtaposed in the row direction and intersecting the row electrode pair on the side of the rear glass substrate facing the front glass substrate. A plurality of column electrodes for generating a counter discharge through a discharge space between one row electrode of the pair of row electrodes is provided, and a required column among a plurality of column electrodes arranged in parallel in the row direction is provided. The PDP in which the area of the portion of the electrode facing one row electrode is set to have a different size corresponding to the position in the panel surface of the discharge cell is the best embodiment.

  The PDP according to this embodiment is, for example, a PDP that performs black luminance display in which only a counter discharge generated between one row electrode and a column electrode of a row electrode pair such as a reset discharge and an address discharge (selective erasing discharge) occurs. Conventionally, when the discharge intensity of the counter discharge is different depending on the position of the discharge cell in the panel surface, the portion of the plurality of column electrodes arranged in parallel in the row direction that faces one row electrode of the required column electrode Since the area is set to a different size corresponding to the position in the panel surface of the discharge cell, the in-plane variation of the discharge intensity of the counter discharge is corrected, and the discharge intensity of the counter discharge is spread over the entire panel surface. Therefore, it is possible to suppress the occurrence of in-plane spots in the luminance display performed by this counter discharge, and to improve the luminance display quality of the PDP.

  According to this PDP, the opposing area with one row electrode on the column electrode side is set to a size corresponding to the position of the discharge cell in the panel surface, so that the opposing area on the row electrode side is reduced. Compared with the adjustment, it is possible to prevent the discharge intensity of the surface discharge performed between the row electrodes from being affected.

  In the PDP of the above-described embodiment, as an aspect of setting the area of the portion of the column electrode facing one row electrode, the area of the portion of the column electrode facing one row electrode is the most in the central portion of the panel surface. The panel surface is divided into three parts: a central part, an intermediate part surrounding the periphery of the central part, and a peripheral part surrounding the periphery of the intermediate part. The area of the portion of the discharge cell located in the three portions of the panel surface facing the one row electrode of the column electrode is the largest in the central portion, and becomes three sizes that become smaller in the order of the intermediate portion and the peripheral portion. A set aspect is mentioned.

  The PDP according to this embodiment corrects the in-plane variation of the discharge intensity of the counter discharge in the PDP having the in-plane variation in which the discharge intensity of the counter discharge tends to be weaker at the center side than at the peripheral portion of the panel surface. Thus, the discharge intensity of this counter discharge can be made substantially uniform over the entire panel surface.

  In the PDP of the above embodiment, as an aspect of setting the area of the portion of the column electrode facing one row electrode, the width in the row direction of the portion of the column electrode facing one row electrode is arbitrarily larger than that of the other portion. Another example is a mode in which a larger widened portion is formed and the area of the widened portion is set to a required size.

  The widened portion, for example, protrudes in the column direction from the row electrode main body portion extending in the row direction to the other row electrode side that is paired with the row electrode main body portion at a position facing the discharge cell, and is paired with each other. It is opposed to a region including the discharge gap side tip portions of the plurality of row electrode protrusions opposed to the other side via the discharge gap.

  In the PDP of the above embodiment, there are three discharge cells: a discharge cell in which a red phosphor layer constituting one pixel is formed, a discharge cell in which a green phosphor layer is formed, and a discharge cell in which a blue phosphor layer is formed. Among the discharge cells, the area of the portion of the column electrode facing one of the column electrodes facing the discharge cell on which the phosphor layer of any color is formed has a different size corresponding to the position in the panel surface of the discharge cell. For example, in the case of only the column electrode facing the discharge cell in which the red phosphor layer is formed, or in the case of only the column electrode facing the discharge cell in which the green phosphor layer is formed, In the case of a column electrode facing the discharge cell with the red phosphor layer and the discharge cell with the green phosphor layer, the column facing the discharge cell with the blue phosphor layer formed The area of the electrode facing one row electrode is constant If, there is a mode such as the case of all the column electrodes.

  That is, the column facing the discharge cell in which the phosphor layer of the color having a large in-plane variation in the discharge intensity of the counter discharge is formed due to the difference in discharge characteristics of the red, green, and blue phosphor materials forming the phosphor layer. By setting the area of the portion of the electrode facing one row electrode in accordance with the in-plane variation of the discharge intensity, the discharge intensity of the counter discharge is made substantially uniform over the entire panel surface.

  In the following description, a PDP in which the counter discharge generated between the row electrode and the column electrode has a discharge intensity distribution in the panel display region as shown in FIG. 1 will be described as an example.

  In FIG. 1, the panel display region P has the weakest discharge intensity of the counter discharge in the elliptical central part P1, and the discharge intensity of the counter discharge in the elliptical donut-shaped intermediate part P2 surrounding the periphery of the central part P1. Is stronger than the central portion P1, and the intensity of the counter discharge is the strongest in the peripheral portion P3 of the panel display region P surrounding the intermediate portion P2.

  2 to 5 show a first embodiment of a PDP according to the present invention. FIG. 2 is a front view showing a panel configuration of a central portion P1 (see FIG. 1) of a panel display area P of the PDP. Is a front view showing the panel configuration of the intermediate portion P2 of the panel display region P, FIG. 4 is a front view showing the panel configuration of the peripheral portion P3 of the panel display region P, and FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG.

  2 to 5, the PDP has a plurality of row electrode pairs (X, Y) on the back surface of the front glass substrate 1 which is a display surface. And are arranged in parallel in the column direction (vertical direction in FIGS. 2 to 4).

  Each of the row electrodes X includes a bus electrode Xa made of a metal film extending in the row direction of the front glass substrate 1, and a transparent electrode such as ITO that is connected to the bus electrode Xa at equal intervals and protrudes in the column direction from the bus electrode Xa. The transparent electrode Xb is formed into a T shape by a conductive film.

  Similarly, the row electrodes Y are bus electrodes Ya made of a metal film extending in the row direction of the front glass substrate 1, ITO connected to the bus electrode Ya at equal intervals, and protruding in the column direction from the bus electrodes Ya, etc. And a transparent electrode Yb formed into a T shape by the transparent conductive film.

  The row electrodes X and Y are alternately arranged in the column direction of the front glass substrate 1 (vertical direction in FIGS. 2 to 4), and are arranged in parallel at equal intervals along the bus electrodes Xa and Ya. The transparent electrodes Xb and Yb extend to the paired row electrode side, and the respective wide end portions are opposed to each other with a discharge gap g having a required width.

  A dielectric layer 2 covering the row electrode pair (X, Y) is further formed on the back side of the front glass substrate 1, and the back surface of the dielectric layer 2 is further formed on the back surface of the dielectric layer 2. A protective layer (not shown) for covering the film is formed.

A plurality of column electrodes D of each row electrode pair (X, Y) are provided on the surface of the rear glass substrate 3 arranged in parallel with the front glass substrate 1 through the discharge space on the side facing the front glass substrate 1. They are arranged in parallel at a predetermined interval so as to extend in a direction (column direction) orthogonal to the bus electrodes Xa and Ya at positions facing the paired transparent electrodes Xb and Yb, respectively.
The configuration of the column electrode D will be described in detail later.

  A column electrode protective layer (dielectric layer) 4 that covers the column electrode D is further formed on the surface of the back glass substrate 3 facing the front glass substrate 1, and on the column electrode protective layer 4, A partition wall 5 having the following shape is formed.

  That is, the partition walls 5 are arranged in the row direction at positions facing the region between the bus electrodes Xa and Ya that are located back to back of the adjacent row electrode pair (X, Y) when viewed from the front glass substrate 1 side. A substantially lattice shape is formed by the extending horizontal wall 5A and the vertical walls 5B extending in the column direction at positions between the transparent electrodes Xb and Yb arranged at equal intervals along the bus electrodes Xa and Ya of the row electrodes X and Y. It is molded into.

  The partition walls 5 divide the discharge space between the front glass substrate 1 and the rear glass substrate 3 into regions facing the transparent electrodes Xb and Yb that are opposed to each other and are paired with each other. C is formed.

  A phosphor layer 6 is formed on each of the side surfaces of the horizontal wall 5A and the vertical wall 5B of the partition wall 5 facing the discharge space in each discharge cell C and the surface of the column electrode protection layer 4 so as to cover almost all of these five surfaces. As shown in FIGS. 2 to 4, the phosphor layer 6 is arranged so that the colors of the red, green, and blue are arranged in order in the row direction for each discharge cell C. A red discharge cell C (R) in which red phosphor layers 6 arranged adjacent to each other in the direction are formed, a green discharge cell C (G) in which green phosphor layer 6 is formed, and a blue phosphor layer 6 are formed. One pixel is constituted by the three discharge cells C of the blue discharge cells C (B) thus formed.

In this embodiment, the red discharge cells C (R), the green discharge cells C (G), and the blue discharge cells C (B) are arranged so that the discharge cells of the same color are arranged in the column direction. .
In the discharge cell C, a discharge gas containing xenon is sealed.

  Next, the configuration of the column electrode D in the central portion P1, the intermediate portion P2, and the peripheral portion P3 of the panel display region P will be described.

  The column electrode D (B) facing the blue discharge cells C (B) arranged in the column direction has a constant row in all the portions facing the central portion P1, the intermediate portion P2, and the peripheral portion P3 of the panel display region P. It is formed in a band shape having a width in the direction.

  Each column electrode D (R) facing the red discharge cells C (R) arranged in the column direction has a portion facing each red discharge cell C (R) in the central portion P1 of the panel display region P in FIG. In addition, a width d2 in the row direction larger than the width d1 in the row direction of the column electrode main body D (R) a extending in a strip shape in the column direction is formed in a portion of the row electrode Y facing the wide tip portion of the transparent electrode Yb. A widened portion D (R) b is formed.

  Further, the column electrode D (R) has a wide width of the transparent electrode Yb of the row electrode Y for each portion facing the red discharge cells C (R) in the intermediate portion P2 of the panel display region P of FIG. A widened portion D (R) c having a smaller area than the widened portion D (R) b in the central portion P1 is formed in a portion facing the tip portion.

  The widened portion D (R) c only needs to have a small area facing the transparent electrode Yb. For this reason, one or both of the width in the row direction and the width in the column direction of the widened portion D (R) c is The width of the widened portion D (R) b in the central portion P1 may be smaller than the width in the row direction or the width in the column direction (in the illustrated example, the width in both the row direction and the column direction is smaller than that in the central portion P1). Small).

  And the part located in the peripheral part P3 of the panel display region P of FIG. 4 of this column electrode D (R) is the part facing each red discharge cell C (R) as in the central part P1 and the intermediate part P2. The abdominal part is not formed, and is constituted only by the column electrode body D (R) a having a width d1 in the row direction.

  Similarly, the column electrode D (G) facing the green discharge cells C (G) arranged in the column direction is also provided for each portion facing the green discharge cells C (G) in the central portion P1 of the panel display region P. The widened portion having a width in the row direction larger than the width in the row direction of the column electrode main body D (G) a extending in a strip shape in the column direction at a portion facing the wide tip portion of the transparent electrode Yb of the row electrode Y D (G) b is formed.

  Further, the column electrode D (G) has a wide width of the transparent electrode Yb of the row electrode Y for each portion facing each green discharge cell C (G) in the intermediate portion P2 of the panel display region P of FIG. A widened portion D (G) c having a smaller area than the widened portion D (G) b in the central portion P1 is formed in a portion facing the tip portion.

  The widened portion D (G) c only needs to have a smaller area facing the transparent electrode Yb. For this reason, one or both of the width in the row direction and the width in the column direction of the widened portion D (G) c is reduced. The width of the widened portion D (G) b in the central portion P1 may be smaller than the width in the row direction or the width in the column direction (in the illustrated example, the width in the row direction and the column direction is smaller than that in the central portion P1). Small).

  And the part located in the peripheral part P3 of the panel display area P of FIG. 4 of this column electrode D (G) is a part facing each red discharge cell C (G) in the center part P1 and the intermediate part P2. The abdominal part is not formed, and is constituted only by the column electrode main body D (G) a having a width in the row direction.

  The width in the row direction and the width in the column direction of the widened portions D (G) b and D (G) c of the column electrode D (G) are respectively the widened portions D (R) b of the column electrode D (R). , D (R) c may be set to the same size, but it is preferable to set according to the discharge characteristics of the red and green fluorescent materials forming the opposing phosphor layers 6.

  When the PDP is driven, a reset pulse is applied to the row electrode Y, and the column electrodes D (R), D (G), D (in each discharge cell C (R), C (G), C (B). B) Reset discharge, which is a counter discharge, is generated all at once, and in all discharge cells, wall charges are formed in the dielectric layers of the opposing portions or the wall charges of the dielectric layers are erased Is done.

  Next, a scanning pulse is applied to the row electrode Y, a data pulse is selectively applied to the column electrodes D (R), D (G), and D (B), and the transparent electrode Ya and the column of the row electrode Y are applied. An address discharge, which is a counter discharge, is selectively generated between the electrodes D (R), D (G), and D (B), and wall charges are formed in the portion of the dielectric layer 2 facing the discharge cells. The light emitting cells and the non-light emitting cells from which the wall charges of the dielectric layer 2 are erased are distributed in the panel display area P of the panel corresponding to the image data of the video signal.

  Thereafter, sustain pulses are alternately applied to the row electrodes X and Y of the row electrode pair (X, Y), and the wall charges formed on the dielectric layer 2 in the light emitting cell cause the row electrodes X and Y to A sustain discharge, which is a surface discharge, is generated between the transparent electrodes Xb and Yb via the discharge gap g, and the phosphor layer 6 of the three primary colors red, green, and blue is generated by vacuum ultraviolet rays generated from xenon in the discharge gas by this discharge. Is excited to emit light, whereby an image by matrix display is formed in the panel display region P.

  In this PDP, the timing and magnitude of application of the reset pulse, scan pulse, and data pulse are arbitrarily set during driving as described above, so that the transparent electrode Yb of the row electrode Y and the column electrode D (R ), D (G), D (B), the phosphor layer 6 is caused to emit light by reset discharge and address discharge, which are counter discharges, and low gradation display such as black luminance display is performed.

  At this time, if the opposing area of the column electrode and the row electrode that generates the counter discharge is the same over the entire surface of the panel, as described above, the secondary electrons of the protective layer (MgO layer) covering the dielectric layer Due to the in-plane variation of the counter discharge presumed to be caused by spots in the panel surface of the emission characteristics, uniform low gradation display cannot be performed over the entire panel surface.

  The PDP is a portion facing the transparent electrode Yb of the row electrode Y of the column electrodes D (R) and D (G) in the central portion P1 where the intensity of the counter discharge in the display area P (see FIG. 1) of the panel is the weakest. The widened portions D (R) b and D (G) b are respectively formed on the surface of the transparent electrode Yb so that the area facing the transparent electrode Yb is larger than that in the peripheral portion P3, and the intensity of the counter discharge is weaker than that in the peripheral portion P3. In the intermediate portion P2 stronger than the central portion P1, the widened portions D (R) b and D (G) in the central portion P1 are respectively formed on the portions of the column electrodes D (R) and D (G) facing the transparent electrode Yb. Widened portions D (R) c, D (G) c having a smaller area facing the transparent electrode Yb than b are formed, and the area facing the transparent electrode Yb is larger than that in the peripheral portion P3, and in the central portion P1. Is smaller than

  The sizes of the widened portions D (R) b and D (G) b and the widened portions D (R) c and D (G) c of the column electrodes D (R) and D (G) The discharge intensity of the counter discharge (reset discharge, address discharge) generated with the Y transparent electrode Yb is arbitrarily set so as to be substantially uniform over the entire surface of the panel display region P.

  Thereby, the in-plane variation of the discharge intensity of the counter discharge in the panel display region P is corrected, and the row electrode Y between the transparent electrode Yb and each column electrode D (R), D (G), D (B) is corrected. Since the discharge intensity of the counter discharge is substantially uniform over the entire surface of the panel display region P, in-plane spots are generated in the luminance display (particularly, low gradation display such as black luminance) performed by the counter discharge. As a result, the luminance display quality of the PDP can be improved.

  According to the PDP, the area facing the transparent electrode Yb on the column electrode side is adjusted to a size corresponding to the discharge intensity of the counter discharge in each part of the panel display region P, so that the row electrode side Compared with the case where the counter area is adjusted, the discharge intensity of the sustain discharge, which is the surface discharge performed between the row electrodes, is not affected by the uniform discharge intensity of the counter discharge.

  In the PDP, the widened portion is formed only on the column electrodes D (R) and D (G) facing the red discharge cell C (R) and the green discharge cell C (G), and the blue discharge cell C (B ) Is not formed on the column electrode D (B) opposite to the blue discharge cell C (B) because of the discharge characteristics of the blue fluorescent material forming the phosphor layer 6 of the blue discharge cell C (B). When the in-plane variation in the panel display region P of the discharge intensity of the counter discharge between the row electrode Y and the column electrode D (B) generated in the case of the red discharge cell C (R) and the green discharge cell C (G) This is because it is very small.

  However, when the variation in the discharge intensity of the counter discharge between the row electrode Y and the column electrode D (B) generated in the blue discharge cell C (B) cannot be ignored, as will be described later, the column A widened portion similar to that of the column electrodes D (R) and D (G) may be formed on the electrode D (B).

  Further, in the above embodiment, the panel display region P is divided into three parts as shown in FIG. 1 and the widened portion is formed in the column electrode corresponding to each part. The panel display area P may be divided into two or four or more parts, and a widened part may be formed in the column electrode corresponding to each part.

  The greater the number of sections of the panel display region P, the more uniform the discharge intensity of the counter discharge over the entire surface of the panel, and the luminance gradation display quality is improved.

  FIG. 6 is a front view showing the panel configuration of the central portion P1 (see FIG. 1) of the panel display area P of the PDP according to the second embodiment of the present invention.

  In the PDP of the first embodiment described above, an example is shown in which the widened portion is formed only in the portion of the column electrode D (R), D (G) facing the transparent electrode Yb of the row electrode Y. In the PDP of the second embodiment, the widened portion formed in the column electrodes D1 (R) and D1 (G) faces not only the transparent electrode Yb of the row electrode Y but also the transparent electrode Xb of the row electrode X. It is molded so as to be the size to be.

  That is, in FIG. 6, the column electrodes D1 (R) and D1 (G) facing the red discharge cell C (R) and the green discharge cell C (G) arranged in the column direction respectively have the panel display region P of the panel display region P. In the central portion P1, the wide tip portion of the transparent electrode Xb of the row electrode X and the wide tip portion of the transparent electrode Yb of the row electrode Y are provided for each portion facing the red discharge cells C (R) and C (G). The widened portions D1 (R) b, D1 (R) having a width in the row direction larger than the width in the row direction of the main body portions D1 (R) a, D1 (G) a extending in a strip shape in the column direction. ) B is formed.

  The column electrodes D1 (R) and D1 (G) have portions (see FIG. 1) facing the red discharge cells C (R) and C (G) in the intermediate portion P2 (see FIG. 1) of the panel display region P. (Not shown), a widened portion having a smaller area than that in the central portion P1 is formed.

  In the peripheral portion P3 (see FIG. 1) of the panel display region P of the column electrodes D1 (R) and D1 (G), the portions facing the red discharge cells C (R) and green discharge cells C (G) As in the case of the first embodiment, it is constituted only by main body portions D1 (R) a and D1 (G) a having a constant width in the row direction.

  Further, the column electrode D1 (B) facing the blue discharge cells C (B) arranged in the column direction has a central portion P1 and an intermediate portion P2, a peripheral portion of the panel display region P as in the case of the first embodiment. The entire width of P3 is formed in a strip shape having a constant width in the row direction.

  The configuration of the other parts of the PDP and the setting of the area of the widened portion in the central portion P1 and the intermediate portion P2 of the panel display region P of the column electrodes D1 (R) and D1 (G) are the same as in the case of the first embodiment. It is.

  Also in this PDP, the in-plane variation of the discharge intensity of the counter discharge in the panel display region P is corrected by the widened portion formed in the column electrodes D1 (R) and D1 (G), and the transparent electrode of the row electrode Y Since the discharge intensity of the counter discharge between Yb and each of the column electrodes D1 (R), D1 (G), and D1 (B) is substantially uniform over the entire surface of the panel display region P, the counter discharge is performed. In-plane spots are suppressed from occurring in the luminance display (particularly, low gradation display such as black luminance), and the luminance display quality of the PDP can be improved.

  According to the PDP, the area facing the transparent electrode Yb on the column electrode side is adjusted to a size corresponding to the counter discharge intensity of each portion of the panel display region P, so that the counter electrode is opposed on the row electrode side. Compared with the case where the area is adjusted, the discharge intensity of the sustain discharge, which is a surface discharge performed between the row electrodes, is not affected by the uniform discharge intensity of the counter discharge.

  FIG. 7 is a front view showing the panel configuration of the central portion P1 (see FIG. 1) of the panel display area P of the PDP according to the third embodiment of the present invention.

  In the PDP of the first embodiment described above, an example is shown in which a widened portion is formed in a portion of the column electrodes D (R) and D (G) facing the transparent electrode Yb of the row electrode Y. In the PDP of the third embodiment, the central portion P1 of the panel display region P faces the red discharge cells C (R) and green discharge cells C (G) of the column electrodes D2 (R) and D2 (G). The entire portion is constituted by widened portions D2 (R) b and D2 (R) b having a wider width in the row direction than in the peripheral portion P3 of the panel display region P.

  Further, in the intermediate portion P2 (see FIG. 1) of the panel display region P of the column electrodes D2 (R) and D2 (G), the portions facing the red discharge cells C (R) and C (G) (not shown). ) As a whole is constituted by a widened portion having a smaller width in the row direction than in the central portion P1.

  In the peripheral portion P3 (see FIG. 1) of the panel display region P of the column electrodes D2 (R) and D2 (G), the portion facing the red discharge cells C (R) and C (G) is the first embodiment. As in the case of, it is constituted only by a main body portion having a constant width in the row direction.

  The column electrodes D2 (B) facing the blue discharge cells C (B) arranged in the column direction are arranged at the center portion P1, the middle portion P2, and the peripheral portion P3 of the panel display region P, as in the first embodiment. The entire surface is formed in a strip shape with a constant width in the row direction.

  The configuration of other parts of the PDP and the setting of the area of the widened portion in the central portion P1 and the intermediate portion P2 of the panel display region P of the column electrodes D2 (R) and D2 (G) are the same as in the first embodiment. It is.

  Also in this PDP, the in-plane variation of the discharge intensity of the counter discharge in the panel display region P is corrected by the widened portion formed in the column electrodes D2 (R), D2 (G), and the transparent electrode of the row electrode Y Since the discharge intensity of the counter discharge between Yb and each of the column electrodes D2 (R), D2 (G), D2 (B) is substantially uniform over the entire surface of the panel display region P, this counter discharge is performed. In-plane spots are suppressed from occurring in the luminance display (particularly, low gradation display such as black luminance), and the luminance display quality of the PDP can be improved.

  According to the PDP, the area facing the transparent electrode Yb on the column electrode side is adjusted to a size corresponding to the discharge intensity of the counter discharge in each part of the panel display region P, so that the row electrode side Compared with the case where the counter area is adjusted, the discharge intensity of the sustain discharge, which is the surface discharge performed between the row electrodes, is not affected by the uniform discharge intensity of the counter discharge.

  FIG. 8 is a front view showing the panel configuration of the central portion P1 (see FIG. 1) of the panel display area P of the PDP according to the fourth embodiment of the present invention.

  In each PDP of the first to third embodiments described above, an example in which the widened portion is formed only in the column electrodes D (R) and D (G) is shown. In the PDP of the fourth embodiment, The widened portion is also formed in the column electrode facing the blue discharge cell C (B).

  That is, in FIG. 8, the column electrode D3 (B) facing the blue discharge cells C (B) arranged in the column direction is opposed to each blue discharge cell C (B) in the central portion P1 of the panel display region P. For each portion, the portion facing the wide tip portion of the transparent electrode Yb of the row electrode Y has a width in the row direction that is larger than the width in the row direction of the main body D3 (B) a extending in a strip shape in the column direction. A widened portion D3 (B) b is formed.

  The column electrode D3 (B) has a portion (not shown) opposed to each blue discharge cell C (B) in the intermediate portion P2 (see FIG. 1) of the panel display region P, more than in the central portion P1. Also, a widened portion having a small area is formed.

  In the peripheral portion P3 (see FIG. 1) of the panel display region P of the column electrode D3 (B), a portion facing each blue discharge cell C (B) has a body portion D3 (B) a having a constant width in the row direction. Consists of only.

  For the other column electrodes facing the red discharge cell C (R) and the green discharge cell C (G), FIG. 8 shows the same column electrodes D1 (R) and D1 (G) as in the second embodiment. However, the column electrodes facing the red discharge cell C (R) and the green discharge cell C (G) are the same column electrodes D (R), D (G) as in the first embodiment. The same column electrodes D2 (R) and D2 (G) as in the third embodiment may be provided.

  The configuration of the other parts of the PDP and the setting of the area of the widened portion in the central portion P1 and the intermediate portion P2 of the panel display region P of the column electrode D3 (B), etc. are the column electrodes D (R), D of the first embodiment. The same as in the case of (G).

  This PDP can exhibit the same technical effect as the PDPs of the first to third embodiments, and the rows generated in the blue discharge cells C (B) in the PDPs of the first to third embodiments. When the variation in the discharge intensity of the counter discharge generated between the electrode Y and the column electrode D (B) cannot be ignored, the blue discharge cell C (B) is also opposed across the entire panel display region P. The discharge intensity of the discharge can be made uniform.

  In the PDPs of the above embodiments, a panel surface is constituted by a first substrate and a second substrate that are opposed to each other through a discharge space, and extends in the row direction on the back side of the first substrate. The row electrode pairs are provided, and on the side of the second substrate facing the first substrate, extending in the column direction and arranged in the row direction to form unit light emitting regions in the discharge spaces at the portions intersecting the row electrode pairs, respectively. In a PDP provided with a plurality of column electrodes for generating a counter discharge through a discharge space with one row electrode of a row electrode pair in each unit light emitting region, the PDPs are arranged in parallel in the row direction. A higher-level concept is a PDP in which the area of a portion of a plurality of column electrodes facing a row electrode of a required column electrode is set to a different size corresponding to the position in the panel surface of the unit light emitting region. In this embodiment.

  The PDP of the embodiment constituting this superordinate concept displays, for example, a black luminance display in which only a counter discharge generated between one row electrode and a column electrode of a row electrode pair such as a reset discharge and an address discharge (selective erasing discharge) occurs. In the conventional PDP, when the discharge intensity of the counter discharge differs depending on the position of the unit light emitting region in the panel surface, one row of a required column electrode among a plurality of column electrodes arranged in parallel in the row direction. Since the area of the portion facing the electrode is set to a different size corresponding to the position in the panel surface of the unit emission region, the discharge intensity of this counter discharge is corrected by correcting the in-plane variation of the discharge intensity of the counter discharge. Can be made substantially uniform over the entire surface of the panel, thereby suppressing the occurrence of in-plane spots in the luminance display performed by this counter discharge and improving the luminance display quality of the PDP. It becomes possible way.

It is explanatory drawing which shows discharge intensity distribution of counter discharge in the panel display area | region of PDP. It is a front view which shows the panel structure of the center part of the panel display area | region in 1st Example of PDP by this invention. It is a front view which shows the panel structure of the intermediate part of the panel display area. It is a front view which shows the panel structure of the peripheral part of the panel display area. It is sectional drawing in the VV line | wire of FIG. It is a front view which shows the panel structure of the center part of the panel display area | region in 2nd Example of PDP by this invention. It is a front view which shows the panel structure of the center part of the panel display area | region in 3rd Example of PDP by this invention. It is a front view which shows the panel structure of the center part of the panel display area | region in 4th Example of PDP by this invention.

Explanation of symbols

1 ... Front glass substrate (first substrate)
2 ... Dielectric layer 3 ... Back glass substrate (second substrate)
6 ... phosphor layer C ... discharge cell (unit emission region)
C (R): Red discharge cell (unit emission region)
C (G): Green discharge cell (unit emission region)
C (B) ... Blue discharge cell (unit emission region)
D, D (R), D (G), D (B), D1 (R), D1 (G), D1 (B), D2 (R), D2 (G), D2 (B), D3 (B ) ... Column electrode D (R) a, D (G) a, D (B) a, D1 (R) a, D1 (G) a, D3 (B) a ... Column electrode body D (R) b, D (R) c, D (G) b, D (G) c, D1 (R) b, D1 (G) b, D2 (R) b, D2 (G) b, D3 (B) b ... Widened portion X, Y ... row electrode Xa, Ya ... bus electrode (electrode body)
Xb, Yb ... Transparent electrode (electrode protrusion)
g ... Gap

Claims (10)

A panel surface is constituted by the first substrate and the second substrate facing each other through the discharge space, and a plurality of row electrode pairs extending in the row direction and arranged in parallel in the column direction are provided on the back side of the first substrate. A unit light emitting region is formed in a discharge space of a portion extending in the column direction and arranged in the row direction and intersecting the row electrode pair on the side facing the first substrate of the two substrates, and the row electrode in each unit light emitting region. In a plasma display panel provided with a plurality of column electrodes for generating counter discharge through a discharge space between one row electrode of a pair,
Of the plurality of column electrodes arranged side by side in the row direction, the area of the portion of the required column electrode facing one row electrode is set to a different size corresponding to the position in the panel plane of the unit light emitting region. A plasma display panel characterized by the above.   2. The plasma display panel according to claim 1, wherein an area of a portion of the column electrode facing one row electrode is the largest in a central portion of the panel surface and becomes smaller toward the peripheral side of the panel surface.   The panel surface is divided into three parts: a central part, an intermediate part surrounding the periphery of the central part, and a peripheral part surrounding the periphery of the intermediate part, and unit light emission located in the three parts of the panel surface 2. The plasma display panel according to claim 1, wherein the area of the portion of the column electrode facing the one row electrode is set to three sizes that are largest in the central portion and smaller in order of the intermediate portion and the peripheral portion. .   A widened portion having a width in the row direction larger than that of the other portion is arbitrarily formed in a portion of the column electrode facing one row electrode, and the widened portion of the portion of the column electrode facing one row electrode The plasma display panel according to claim 1, wherein an area is set. Each row electrode constituting the row electrode pair protrudes in the column direction from the row electrode main body portion extending in the row direction to the other row electrode side paired from the row electrode main body portion at a position facing each unit light emitting region. A plurality of row electrode protrusions opposed to the other side paired with each other through a discharge gap,
5. The plasma display panel according to claim 4, wherein the widened portion of the column electrode is opposed to a region including a front end portion on the discharge gap side of the row electrode protruding portion of one of the row electrodes.   One pixel is composed of three unit light-emitting areas: a unit light-emitting area in which a red phosphor layer is formed, a unit light-emitting area in which a green phosphor layer is formed, and a unit light-emitting area in which a blue phosphor layer is formed. Of the unit light emitting regions constituting one pixel, the area of the portion facing the one row electrode of the column electrode facing the unit light emitting region where the phosphor layer of any color is formed is the panel of the unit light emitting region The plasma display panel according to claim 1, wherein the plasma display panel is set to have a different size corresponding to a position in the plane.   The column electrode in which the area of the portion facing the one row electrode is set to a different size corresponding to the position in the panel surface of the unit light emitting region is opposed to the unit light emitting region where the red phosphor layer is formed. The plasma display panel according to claim 6, wherein the plasma display panel is a column electrode.   The column electrode in which the area of the portion facing the one row electrode is set to have a different size corresponding to the position in the panel surface of the unit light emitting region is opposed to the unit light emitting region where the green phosphor layer is formed. The plasma display panel according to claim 6, wherein the plasma display panel is a column electrode.   The column electrode in which the area of the portion facing the one row electrode is set to have a different size corresponding to the position in the panel surface of the unit light emitting region is the unit light emitting region in which the red phosphor layer is formed and the green color Column electrodes opposed to the unit light emitting regions on which the phosphor layers are formed, and the column electrodes opposed to the unit light emitting regions on which the blue phosphor layers are formed The plasma display panel according to claim 6, wherein the area is constant.   Each column electrode facing the unit light emitting region where the red phosphor layer is formed, the unit light emitting region where the green phosphor layer is formed, and the unit light emitting region where the blue phosphor layer is formed, respectively, 10. The plasma display panel according to claim 9, wherein the area of the portion facing one row electrode is set to have a different size corresponding to the position of the unit light emitting region in the panel surface.

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