JP2008181743A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a PDP which carries out luminance display by opposed discharge, in which improvement in quality of luminance display is achieved. <P>SOLUTION: The area of transparent electrodes Xb, Yb opposed to a required discharge cell C of row electrodes X, Y to constitute a row electrode pair (X, Y) is established in different sizes corresponding to the location in the panel surface of the discharge cell C. In each of the discharge cell C of the PDP, out of a plurality of column electrodes D(R), D(G), D(B) for generating opposed discharge through a discharge space between one of the row electrode Y of the row electrode pair (X, Y), wide width portions D(R)b, D(R)c, D(G)b, D(G)c are formed at a portion opposed to the transparent electrode Yb of the row electrode Y of the required column electrode, and the area of this wide width portions D(R)b, D(R)c, D(G)b, D(G)c is established in different sizes corresponding to the location in the panel surface of the discharge cell C. <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 discharge generating portion facing the required unit light emitting region of the row electrode constituting the row electrode pair is set to a different size according to the position in the panel surface of the unit light emitting region. And parallel in the row direction Among the plurality of column electrodes, the area of the portion facing the discharge occurrence portion of one row electrode of the required column electrode corresponds to the area of the discharge occurrence portion of the row electrode within the panel surface of the unit light emitting region. It is characterized by being set to a different size according to the position.

  In the PDP according to the present invention, a panel surface is constituted by a first substrate and a second substrate facing each other through a discharge space, and a plurality of row electrodes extending in the row direction on the back side of the first 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 second substrate facing the first substrate. A plurality of column electrodes for generating a counter discharge through a discharge space with one of the row electrodes in the row electrode pair are provided, and face a required discharge cell of the row electrode constituting the row electrode pair. The area of the discharge generating portion is set to a different size according to the position in the panel surface of the discharge cell, and one of the row electrodes of a required column electrode among a plurality of column electrodes arranged in parallel in the row direction. The area of the part facing the discharge generating part is The PDP has been set a different size according to the position of the panel surface of the corresponding discharge cells to the area of the discharge generation portion of the row electrodes is set to its best embodiments.

  The PDP according to this embodiment is a PDP that performs low gradation display such as black luminance display by a counter discharge generated between one row electrode and a column electrode of a row electrode pair. When the discharge intensity of the counter discharge differs depending on the position, the area of the discharge generating portion facing the required discharge cell of the row electrode constituting the row electrode pair and the plurality of column electrodes arranged in parallel in the row direction The area of the portion of the column electrode facing the discharge generation portion of one row electrode is set to a different size depending on the position in the panel surface of the discharge cell, and the discharge generation portion of one row electrode and the column The area of the electrode facing the portion of the row electrode facing the discharge generation portion is large in a discharge cell having a weak counter discharge intensity according to the position in the panel surface of the discharge cell, and the discharge intensity of the counter discharge is high. For strong discharge cells Therefore, the in-plane variation of the discharge intensity of the counter discharge can be corrected and the discharge intensity of the counter discharge can be made almost uniform over the entire panel surface. It is possible to improve the luminance display quality of the PDP by suppressing the occurrence of in-plane spots in the luminance display performed by the discharge.

  In the PDP of the above-described embodiment, the mode of setting the area of the portion facing the discharge occurrence portion of the row electrode and the discharge occurrence portion of one row electrode of the column electrode is the largest at the center portion of the panel surface, respectively. 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. In the discharge cell located in the three parts of the surface, the area of the discharge electrode of the row electrode and the part of the column electrode facing the discharge generation part of one of the row electrodes is the largest in the central part, and the middle part and the peripheral part The aspect set to three magnitude | sizes which become small in order 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 discharge generation portion of the row electrode, the row electrode main body extending in the row direction is paired with the row electrode main body at a position facing the unit light emitting region. In a row electrode having a plurality of row electrode protrusions constituting a discharge generating portion that protrudes in the column direction to the other row electrode side and faces the other side that is paired with each other through a discharge gap, The aspect which sets the area of the row electrode protrusion part which opposes a required discharge cell among row electrode protrusion parts to a different magnitude | size according to the position in the panel surface of a discharge cell is mentioned.

  In addition, as an aspect of setting the area of the portion of the column electrode facing the one row electrode, the width in the row direction is arbitrarily larger than the other portion in the portion of the column electrode facing the discharge generating portion of the one row electrode. There is an embodiment in which a large 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. Of the discharge cells, the area of the discharge generation portion of the row electrode facing the discharge cell in which the phosphor layer of any color is formed and the area of the portion of the column electrode facing the discharge generation portion of one row electrode are For example, in the case where only the discharge generation part and the column electrode of the row electrode facing the discharge cell in which the red phosphor layer is formed are set in different sizes corresponding to the positions in the panel surface of the cell, or in the green In the case of only the discharge generating portion of the row electrode and the column electrode facing the discharge cell on which the phosphor layer is formed, the discharge cell on which the red phosphor layer is formed and the discharge cell on which the green phosphor layer is formed Of discharge of row electrodes facing each other In the case of the minute and column electrodes, the discharge generation portion of the row electrode facing the discharge cell in which the blue phosphor layer is formed and the column electrode are all in the case where the area of the portion facing the one row electrode is constant. There are embodiments such as a case where a discharge occurs in a row electrode and a column electrode.

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

  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.
The configuration of the transparent electrodes Xb and Yb of the row electrodes X and Y will be described in detail later.

  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 transparent electrodes Xb and Yb of the row electrodes X and Y in the central part P1, the intermediate part P2, and the peripheral part P3 of the panel display region P will be described.

  The transparent electrodes Xb and Yb of the row electrodes X and Y have base end portions in which the width in the row direction of the tip portions Xb1 and Yb1 facing each other through the discharge gap g is connected to the bus electrodes Xa and Ya. It is formed in a substantially T shape that is larger than the width in the row direction of Xb2 and Yb2.

  Of the transparent electrodes Xb and Yb arranged along the bus electrodes Xa and Ya, the transparent electrodes Xb (B) and Yb (B) facing the blue discharge cells C (B) aligned in the column direction are: The width W1a in the row direction and the width W1b in the column direction of the front end portions Xb1 (B) and Yb1 (B) and the base end in all portions facing the central portion P1, the intermediate portion P2, and the peripheral portion P3 of the panel display region P The widths W1c in the row direction of the portions Xb2 (B) and Yb2 (B) are set to be the same in all the portions and are formed to have the same area.

  In the central portion P1 of the panel display region P in FIG. 2, the transparent electrodes Xb (R), Yb (R) facing the red discharge cell C (R) and the transparent electrode Xb (G) facing the green discharge cell C (G). ), Yb (G) are formed so that their respective areas are larger than those of the transparent electrodes Xb (B), Yb (B) facing the blue discharge cell C (B).

  That is, in the illustrated example, the transparent electrodes Xb (R), Yb (R) facing the red discharge cell C (R) and the transparent electrodes Xb (G), Yb (G) facing the green discharge cell C (G). Each of the leading ends Xb1 (R), Yb1 (R), Xb1 (G), and Yb1 (G) has a width W2a in the row direction and a width W2b in the column direction, which are opposite to the blue discharge cell C (B). The widths W1a in the row direction and the width W1b in the column direction of the distal end portions Xb2 (B), Yb1 (B) of the transparent electrodes Xb (B), Yb (B) are smaller than the base end portions Xb2 (R), Yb2 The row width W2c of (R), Xb2 (G), Yb2 (G) is the width of the base end portions Xb2 (B), Yb2 (B) of the transparent electrodes Xb (B), Yb (B) in the row direction. The transparent electrodes Xb (R) and Yb (R) are set so as to be larger than W1c (W2c> W1c). Xb (G), Yb (G) is, the area of the transparent electrodes Xb (B), and is formed to be larger than Yb (B).

  In the intermediate portion P2 of the panel display region P in FIG. 3, the transparent electrodes Xb (R), Yb (R) facing the red discharge cell C (R) and the transparent electrode Xb (G) facing the green discharge cell C (G). ), Yb (G) are smaller in area than the central portion P1 described above, and larger than the transparent electrodes Xb (B), Yb (B) facing the blue discharge cell C (B). Molded.

  In other words, in the example shown in the figure, the respective tip portions Xb1 (R), Yb1 (R), Xb1 (G), Yb1 () of the transparent electrodes Xb (R), Yb (R), Xb (G), Yb (G). The width W3a in the row direction and the width W3b in the column direction of G) are both the width W1a and the column in the row direction of the leading ends Xb1 (B) and Yb1 (B) of the transparent electrodes Xb (B) and Yb (B). The width W3c in the row direction of the base end portions Xb2 (R), Yb2 (R), Xb2 (G), and Yb2 (G) is smaller than the width W1b in the direction and larger than the widths W2a and W2b in the central portion P1. The widths W1c in the row direction of the base ends Xb2 (B) and Yb2 (B) of the transparent electrodes Xb (B) and Yb (B) are larger than the width W2c in the central portion P1 (W2c> W3c> W1c). Transparent electrodes Xb (R), Yb (R) Xb (G), Yb (G) is, but the area is smaller than in the central portion P1, the transparent electrode Xb (B), and is formed to be larger than Yb (B).

  In the part located in the peripheral part P3 of the panel display area P of FIG. 4, it opposes transparent electrode Xb (R), Yb (R) and green discharge cell C (G) which oppose red discharge cell C (R). The transparent electrodes Xb (G) and Yb (G) have the same area as the transparent electrodes Xb (B) and Yb (B) facing the blue discharge cell C (B), that is, the transparent electrodes Xb (R). ), Yb (R), Xb (G), Yb (G), the widths and the bases in the row direction and the column direction of Yb1 (R), Yb1 (R), Xb1 (G), and Yb1 (G), respectively. The widths in the row direction of the end portions Xb2 (R), Yb2 (R), Xb2 (G), and Yb2 (G) are all the tip portions Xb2 (B) and Yb (B) of the transparent electrodes Xb (B) and Yb (B). The width W1a in the row direction and the width W1b in the column direction of Yb1 (B), the row direction of the base end portions Xb2 (B), Yb2 (B) It is formed to be the same size as the width W1c.

  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, the column electrode main body D (R) a extending in a strip shape in the column direction in the row direction is formed in a portion facing the tip portion of the transparent electrode Yb (R) including the wide tip portion Yb1 (R) of the row electrode Y. A widened portion D (R) b having a width d2 in the row direction larger than the width d1 is formed.

  Further, the column electrode D (R) includes a wide front end portion Yb1 (row electrode Y) (for each portion facing the red discharge cells C (R) in the intermediate portion P2 of the panel display region P in 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 of the transparent electrode Yb (R) including R).

  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 widened portion is not formed, and is constituted only by the column electrode main 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 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 tip portion of the transparent electrode Yb (G) including the wide tip portion Yb1 (G) of the row electrode Y A widened portion D (G) b having a larger width in the row direction is formed.

  Further, the column electrode D (G) includes a wide tip end portion Yb1 (a wide end portion Yb1) of the row electrode Y in each intermediate portion P2 of the panel display region P in 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 at a portion facing the tip portion of the transparent electrode Yb (G) including G).

  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.

  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 scan 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 Yb of the row electrode Y and the column 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 has a column electrode D (R), at the tip of the transparent electrodes Yb (R), Yb (G) at the central portion P1 where the counter discharge intensity of the display area P (see FIG. 1) of the panel is the weakest. The widened portions D (R) b and D (G) b of D (G) face each other, so that the transparent electrodes Yb (R) and Yb (G) and the column electrodes D (R) and D (G) Is larger than that in the peripheral portion P3.

  Further, in the intermediate portion P2 where the intensity of the counter discharge is weaker than that of the peripheral portion P3 and stronger than that of the central portion P1, the column electrodes D (R) and D (G (G) are formed at the tip portions of the transparent electrodes Yb (R) and Yb (G). ) Wide portions D (R) c and D (G) c are opposed to each other, so that the transparent electrodes Yb (R) and Yb (G) and the column electrodes D (R) and D (G) are opposed to each other. Is smaller in the central portion P1 and larger than in the peripheral portion P3.

  It should be noted that the transparent electrodes Yb (R), Yb (G) of the row electrodes Y (R), Y (B) and the widened portions D (R) b, D (R) b, The opposing areas of D (G) b, D (R) c, and D (G) c are discharges of counter discharges (reset discharge, address discharge) generated between the row electrodes Y and the transparent electrodes Yb, respectively. The intensity is arbitrarily set so as to be almost 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.

  In the PDP, the transparent electrode Yb (B) facing the blue discharge cell C (B) is formed to have the same size (area) in all of the central portion P1, the intermediate portion P2, and the peripheral portion P3. The widened portion is not formed on the column electrode D (B) facing the blue discharge cell C (B) because the blue fluorescent material forming the phosphor layer 6 of the blue discharge cell C (B) is discharged. Due to the characteristics, 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 blue discharge cell C (B) is caused by the red discharge cell C (R). This is because it is much smaller than that in the green discharge cell C (G).

  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, the transparent electrode Yb (B) May be formed so as to increase in the order of the peripheral portion P3, the intermediate portion P2, and the central portion P1, and as will be described later, the column electrode D (B) also includes the column electrodes D (R) and D (G). A widened portion similar to the above may be formed.

In the above embodiment, the panel display area P is divided into three parts as shown in FIG. 1, and the areas of the transparent electrodes Xb, Yb of the row electrodes X, Y are set or columns corresponding to the respective parts. Although the widened portion is formed in the electrode, the present invention is not limited to this example, and the panel display region P is divided into two or more portions, and the transparent electrodes of the row electrodes X and Y corresponding to the respective portions. You may make it set the area of Xb and Yb, or may form a wide part in a column electrode.
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.

  In the above example, the size (area) of the transparent electrodes Yb (R) and Yb (G) of the row electrodes Y (R) and Y (B) is equal to each other in the central portion P1 and the intermediate portion P2. However, different sizes may be set according to the discharge characteristics of the red and green fluorescent materials forming the phosphor layers 6 facing each other.

  Similarly, in the above example, the size (area) of the widened portions D (R) b, D (R) c and D (G) b, D (G) c of the column electrodes D (R), D (G). ) Are set to be equal to each other at the central portion P1 and the intermediate portion P2, but are set to different sizes according to the discharge characteristics of the red and green fluorescent materials forming the opposing phosphor layers 6, respectively. You may make it do.

  In the above example, the widened portions D (R) c and D (G) c of the column electrodes D (R) and D (G) only need to have a smaller area facing the transparent electrode Yb. In addition, one or both of the width in the row direction and the width in the column direction of the widened portions D (R) c and D (G) c is the row of the widened portions D (R) b and D (G) b in the central portion P1. It is only necessary to be smaller than the width in the direction or the width in the column direction (in the example shown, the width is smaller in the row direction and the column direction than in the central portion P1).

  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) is not only the transparent electrodes Yb (R) and Yb (G) of the row electrodes Y but also the row electrodes. The transparent electrodes Xb (R) and Xb (G) of X are formed so as to face each other.

  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 portions of the transparent electrodes Xb (R), Xb (G) of the row electrode X and the row electrodes Y of the row electrodes X are arranged for each portion facing the red discharge cells C (R), C (G). Rows 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 at a portion facing the wide tip portion of the transparent electrodes Yb (R), Yb (G). Widened portions D1 (R) b and D1 (R) b having a width in the direction are formed.

  In the intermediate portion P2 (see FIG. 1) of the panel display region P, the column electrodes D1 (R) and D1 (G) are opposed to the red discharge cells C (R) and C (G) ( A widened portion that is opposed to the wide tip portion of each of the transparent electrodes Xb (R) and Yb (R), Xb (G), and Yb (G) and has a smaller area than the central portion P1 is not shown. Is formed.

  In the peripheral portion P3 (see FIG. 1) of the panel display region P, the portions of the column electrodes D1 (R) and D1 (G) facing the red discharge cells C (R) and green discharge cells C (G) (see FIG. 1). In the same manner as in the case of the first embodiment, the not-shown portion is constituted by only the 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 transparent electrodes Xb (R), Yb (R), Xb (G), and Yb (G) of the row electrodes X and Y have the same size (area) as the panel display region P as in the first embodiment. The central portion P1 is the largest, and the intermediate portion P2 and the peripheral portion P3 are formed to become smaller in this order.

  In this example, the tip portions Xb1 (R), Yb1 (R), Xb1 (G), Yb1 (G) of the transparent electrodes Xb (R), Yb (R), Xb (G), Yb (G) are used. Only the width W2b in the column direction is set to a different dimension, and the area is larger than the transparent electrodes Xb (B), Yb (B) in the central portion P1 and the intermediate portion P2, and the central portion P1, the intermediate portion It is formed so that the area becomes smaller in the order of P2 and the peripheral portion P3.

  The structure of the other part of this PDP and the panel display area P of the widened part of the transparent electrodes Xb (R), Yb (R), Xb (G), Yb (G), column electrodes D1 (R), D1 (G) The setting of the area in the central part P1 and the intermediate part P2 is the same as in the first embodiment.

  Also in this PDP, the opposing areas of the transparent electrodes Yb (R), Yb (G) and the widened portions formed in the column electrodes D1 (R), D1 (G) have a peripheral portion P3, an intermediate portion P2, and so on. By increasing in the order of the central portion P1, the in-plane variation of the discharge intensity of the counter discharge in the panel display region P is corrected, and the row electrodes Yb (R), Yb (G), Yb (B) and Since the discharge intensity of the counter discharge between the column electrodes D1 (R), D1 (G), and D1 (B) is substantially uniform over the entire surface of the panel display region P, the luminance display performed by the counter discharge is performed. In-plane spots are suppressed from occurring (particularly in low gradation display such as black luminance), and the luminance display quality of the PDP can be improved.

  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 width in the row direction smaller than that in the central portion P1 and larger than that in the peripheral portion P3.

  In the peripheral portion P3 (see FIG. 1) of the panel display region P of the column electrodes D2 (R) and D2 (G), portions (not shown) facing the red discharge cells C (R) and C (G) are As in the case of the first embodiment, it is constituted only by the main body having the same width as the portion facing the blue discharge cell C (B).

  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 transparent electrodes Xb (R), Yb (R), Xb (G), and Yb (G) of the row electrodes X and Y have the same size (area) as the panel display region P as in the first embodiment. The central portion P1 is the largest, and the intermediate portion P2 and the peripheral portion P3 are formed to become smaller in this order.

  In this example, the base ends Xb2 (R), Yb2 (R), Xb2 (G), Yb2 (G) of the transparent electrodes Xb (R), Yb (R), Xb (G), Yb (G) Only the width W2c in the row direction is set to a different dimension, and the area is larger than the transparent electrodes Xb (B) and Yb (B) in the central portion P1 and the intermediate portion P2, and the central portions P1 and It is formed so that the area becomes smaller in order of the part P2 and the peripheral part P3.

  The structure of other parts of this PDP and the panel display area P of the widened part of the transparent electrodes Xb (R), Yb (R), Xb (G), Yb (G), column electrodes D2 (R), D2 (G) The setting of the area in the central part P1 and the intermediate part P2 is the same as in the first embodiment.

  Also in this PDP, the opposing areas of the transparent electrodes Yb (R), Yb (G) and the widened portions formed in the column electrodes D2 (R), D2 (G) have a peripheral part P3, an intermediate part P2, and so on. By increasing the area in the order of the central portion P1, the in-plane variation of the discharge intensity of the counter discharge in the panel display region P is corrected, and the row electrodes Yb (R), Yb (G), Yb (B ) And the column electrodes D2 (R), D2 (G), and D2 (B), the discharge intensity of the counter discharge is almost uniform over the entire surface of the panel display region P. The occurrence of in-plane spots is suppressed in the brightness display (particularly low gradation display such as black brightness), and the brightness display quality of the PDP can be improved.

  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. The row direction of the body portion D3 (B) a extending in a strip shape in the column direction at a portion facing the tip portion including the wide tip portion Yb1 (B) of the transparent electrode Yb (B) of the row electrode Y The widened portion D3 (B) b having a width in the row direction larger than the width 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 (not shown) facing each blue discharge cell C (B) has a body portion having a constant width in the row direction. It is composed only of D3 (B) a.

  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 forms of the transparent electrodes Xb (R), Yb (R), Xb (G), and Yb (G) of the row electrodes X and Y are the same as those in the third embodiment described above. In addition, the area of the central portion P1 and the intermediate portion P2 is larger than that of the transparent electrodes Xb (B) and Yb (B), and the areas of the central portion P1, the intermediate portion P2, and the peripheral portion P3 become smaller in this order. It is formed to go.

  The structure of the other part of this PDP and the panel display area P of the widened part of the transparent electrodes Xb (R), Yb (R), Xb (G), Yb (G), column electrodes D1 (R), D1 (G) The setting of the area in the central part P1 and the intermediate part P2 is the same as in the first embodiment.

  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 row constituting the row electrode pair The area of the discharge generation portion facing the required unit light emitting region of the electrode is set to a different size according to the position of the unit light emitting region in the panel surface, and a plurality of column electrodes arranged in parallel in the row direction One row electrode of the required column electrode An upper concept of a PDP in which the area of the portion facing the discharge generating portion is set to have a different size corresponding to the position of the unit light emitting region in the panel surface corresponding to the area of the discharge generating portion of the row electrode The embodiment of the PDP that constitutes

  The PDP according to the embodiment constituting this superordinate concept is a panel in which a low-gradation display such as a black luminance display is performed by a counter discharge generated between one row electrode and a column electrode of a row electrode pair. When the discharge intensity of the counter discharge is different depending on the position of the unit light emitting region, the area of the discharge generating part facing the required unit light emitting region of the row electrode constituting the row electrode pair is arranged in the row direction. Of the plurality of column electrodes, the area of the portion of one column electrode that faces the discharge generation portion of the required column electrode is set to a different size according to the position in the panel surface of the unit light emitting region. In the unit light emitting region where the discharge intensity of the counter discharge is weak according to the position in the panel surface of the unit light emitting region, the facing area between the discharge generating portion of the row electrode and the portion facing the discharge generating portion of the row electrode of the column electrode Big and also vs By setting the discharge intensity of the discharge to be small in the unit light emitting region, the in-plane variation of the discharge intensity of the counter discharge is corrected, and the discharge intensity of the counter discharge is made substantially uniform over the entire panel surface. Accordingly, 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.

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 electrodes 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 part X, Y ... Row electrode Xa, Ya ... Bus electrode (electrode body part)
Xb (R), Yb (R), Xb (G), Yb (G), Xb (B), Yb (B)
... Transparent electrodes (electrode protrusions, discharge generating parts)
Xb1 (R), Yb1 (R), Xb1 (G), Yb1 (G), Xb1 (B), Yb1
(B) ... tip portion Xb2 (R), Yb2 (R), Xb2 (G), Yb2 (G), Xb2 (B), Yb2
(B) ... proximal end g ... gap

Claims (11)

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,
The area of the discharge generating portion facing the required unit light emitting region of the row electrode constituting the row electrode pair is set to a different size according to the position in the panel surface of the unit light emitting region, and is aligned in the row direction. Of the plurality of provided column electrodes, the area of the portion facing the discharge generation portion of one row electrode of the required column electrode corresponds to the area of the discharge generation portion of the row electrode within the panel surface of the unit light emitting region. The plasma display panel is characterized in that it is set to a different size according to the position of the.   Both the area of the row electrode discharge generating portion and the area of the column electrode facing the discharge generating portion of one row electrode are the largest in the central portion of the panel surface and become smaller toward the peripheral side of the panel surface. The plasma display panel according to claim 1.   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 The area of the discharge generating portion of the row electrode in the region and the area of the portion of the column electrode facing the discharge generating portion of one row electrode are the largest in the central portion, and are reduced to three sizes in the order of the intermediate portion and the peripheral portion. The plasma display panel according to claim 1, which 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 constituting a discharge generating portion opposed to the other side paired with each other via a discharge gap, and a required unit among the plurality of row electrode protrusions of the row electrode 2. The plasma display panel according to claim 1, wherein the area of the row electrode protruding portion facing the light emitting region is set to a different size according to the position of the unit light emitting region within the panel surface.   A widened portion having a width in the row direction larger than that of the other portion is arbitrarily formed in a portion facing the one row electrode of the column electrode, and this widened portion allows a discharge generation portion of one row electrode of the column electrode to be generated. The plasma display panel according to claim 1, wherein the areas of the opposing portions are 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 constituting a discharge generation portion opposed to the other side paired with each other via a discharge gap,
The plasma display panel according to claim 5, 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 row electrode.   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. The area of the discharge portion of the row electrode facing the unit light emitting region in which the phosphor layer of any color is formed and the portion facing the one row electrode of the column electrode among the unit light emitting regions constituting one pixel The plasma display panel according to claim 1, wherein the unit light emitting area is set to have a different size according to a position in the panel surface of the unit light emitting region.   The discharge generation portion and the column electrode of the row electrode set to have different sizes corresponding to the positions in the panel surface of the unit light emitting region are the row electrode facing the unit light emitting region where the red phosphor layer is formed. The plasma display panel according to claim 7, which is a discharge generating portion and a column electrode.   The discharge generation portion and the column electrode of the row electrode set to have different sizes corresponding to the position in the panel surface of the unit light emitting region are the row electrode facing the unit light emitting region where the green phosphor layer is formed. The plasma display panel according to claim 7, which is a discharge generating portion and a column electrode.   The unit light emitting region and the green phosphor layer in which the discharge generation portion and the column electrode of the row electrode set to different sizes corresponding to the positions in the panel surface of the unit light emitting region are formed with the red phosphor layer The discharge generating portion and the column electrode of the row electrode that are respectively opposed to the unit light emitting region in which the blue phosphor layer is formed, and the discharge generating portion and the column electrode of the row electrode that are opposed to the unit light emitting region in which the blue phosphor layer is formed The plasma display panel according to claim 7, wherein the size is constant.   Discharge of any row electrode facing the unit light emitting region in which the red phosphor layer is formed, the unit light emitting region in which the green phosphor layer is formed, and the unit light emitting region in which the blue phosphor layer is formed 8. The plasma display panel according to claim 7, wherein the generation portion and the column electrode are also set to have different sizes according to the position of the unit light emitting region within the panel surface.

Images