JP2005285786A - Surface discharge type plasma display panel and surface discharge type plasma display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that a blue-color luminescent area has the same level as those of red-color and green-color luminescent areas and the light emitting strength of a blue-color is deteriorated relatively so that the blue-color luminescent area is forced to display at a low color temperature. <P>SOLUTION: Of three primary color phosphors (38) formed in unit luminescent areas (EU) constituting a pixel (EG), the width of a blue phosphor (38 B) is about twice widths of red and green phosphors (38 R, 38 G). This allows a white color temperature of 9,300 K without causing the deterioration of the phosphors (38) and degrading red and green gradations. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a plasma display device and a plasma display panel, and more particularly to a plasma display device and a plasma display panel suitable for image display with a high color temperature.

  FIG. 29 is a block diagram showing a plasma display device disclosed in, for example, JP-A-5-307935. In FIG. 29, 100 is a plasma display device, 1 is display electrodes EX and EY (hereinafter referred to as X electrode EX and Y electrode EY, respectively) and address electrodes (hereinafter referred to as A A plasma display panel (hereinafter referred to as PDP) including 110 electrodes, 110 a scan control unit, and 120 an A / D converter (hereinafter referred to as A / D) for analog / digital conversion of an input signal. 130 is a frame memory for storing the output of the A / D 120, 141 is an X electrode drive circuit for supplying a drive signal to the X electrode EX of the PDP1, and 142 is a Y electrode for supplying a drive signal to the Y electrode EY of the PDP1 A driving circuit 143 is an A electrode driving circuit for supplying a driving signal to the A electrode of the PDP 1, 2 is an X electrode driving circuit 141, A drive control system including the electrode driving circuit 142 and the A electrode driving circuit 143.

  Next, a method for driving the plasma display apparatus 100 will be described.

  FIG. 30 is a timing chart showing an example of an applied voltage waveform described in, for example, Japanese Patent Laid-Open No. 7-160218, and represents a period of one subfield in the subfield gradation method.

  In FIG. 30, nl is a scan pulse, n2 is an address pulse, n3 is a sustain pulse, and n4 is a priming pulse (full-surface write pulse).

  One subfield consists of (1) a reset period for erasing wall charges, (2) an address period for accumulating wall charges in a cell that emits display light, and (3) walls within the address period. This is divided into a sustain discharge period for causing display discharge by generating a sustain discharge in the cell in which the charge is accumulated.

  Among these, in the reset period, a full write pulse n4 is applied to the sustain electrode EX to cause discharge in all cells. The full write pulse n4 may be called a priming pulse. Next, self-erase discharge is generated for all the cells at the fall of the full write pulse n4, and wall charges are erased.

  In the subsequent address period, a scan pulse n1 is sequentially applied to each of the Y electrodes EY1 to EYn, and an address pulse n2 is applied to each of the A electrodes 22j, thereby generating an address discharge in a cell to be lit in the display period. Then, wall charges are accumulated on the surface of the protective layer 18 of the cell.

  Next, in the sustain discharge period, the sustain pulse n3 is alternately applied to the Y electrode EYi (i: 1 to n) and the X electrode EX, whereby the sustain discharge is generated only for the cell in which the address discharge has occurred.

  FIG. 31 is a perspective view showing the structure of a conventional PDP 1 disclosed in, for example, Japanese Patent Laid-Open No. 5-299019. In FIG. 31, 11 is a first substrate which is a front substrate, and 17 is an X electrode described below. A dielectric layer covering the EX and Y electrodes EY, 18 is a protective layer made of, for example, MgO, covering the surface of the dielectric layer 17, 22 is an A electrode, 21 is a second substrate which is a back substrate, and 28 is an A electrode The phosphors are formed in a stripe shape that is not interrupted along the line 22, 29 is a partition provided on the second substrate 21 side, 30 is a discharge space, 41 is a strip-shaped transparent conductive film composed of a nesa film, etc. (Hereinafter referred to as transparent electrodes), and are arranged in parallel with each other at a predetermined interval (discharge gap) in order to form the X electrode EX and the Y electrode EY. Reference numeral 42 denotes a belt-like metal film (hereinafter referred to as a metal electrode) composed of a multilayer film such as Cr—Cu—Cr or Cr—Al—Cr for supplementing the conductivity of the transparent electrode 41, and an X electrode The EX and Y electrodes EY are respectively composed of a transparent electrode 41 and a metal electrode 42 additionally provided thereon. EG is a pixel, and in the case of a color display device, EG is composed of unit light-emitting areas EU that emit light of a plurality of colors. S is a display surface.

  Next, the operation of the conventional plasma display apparatus will be described. The plasma display device 100 includes a PDP 1 and a drive control system 2 electrically connected to the PDP 1 via a flexible printed wiring board for driving the PDP 1. In the drive control system 2, the input signal is converted from analog to digital by the A / D 120, and in response to the digital image signal stored in the frame memory 130 that stores the digital output from the A / D 120, An output is supplied to each of the X electrode drive circuit 141, the Y electrode drive circuit 142, and the A electrode drive circuit 143, and the PDP 1 is driven.

  Here, the PDP 1 is a surface discharge type PDP having a three-electrode structure in which a pair of display electrodes, that is, an X electrode EX, a Y electrode EY, and an A electrode are associated with the unit light emitting region EU, and the X electrode EX and the Y electrode EY. Are both composed of a transparent electrode 41 and a metal electrode 42, and are arranged on the inner surface of the first substrate 11 on the display surface S side. On the other hand, a partition wall 29 is provided on the second substrate 21, and the height of the discharge space 30 is defined by the partition wall 29, and the discharge space 30 extends in the extending direction of the X electrode EX and the Y electrode EY (hereinafter referred to as the first electrode). Is divided into unit light-emitting regions EU along the direction 1).

  Between the parallel partitions 29, 29, an A electrode having a predetermined width is disposed by pattern printing and baking of a silver paste, and the second substrate 21 including the side surface of the partition 29 and the surface of the A electrode 22 is disposed on the second substrate 21. The phosphor 28 is provided in a cover stripe shape, and the pixel EG has three substantially equal rectangular unit light emitting regions EU (corresponding to red (R), green (G) and blue (B) emission colors ( 28R), EU (28G), EU (28B) (collectively referred to as a unit light emitting region EU), and is formed in a substantially square shape. That is, the widths of the unit light emitting regions EU in the pixel EG in the first direction D1 are substantially equal, and the unit light emitting regions EU of the respective light emission colors are provided with a width of 1/3 in the first direction D1. .

  Further, in order to prevent the contrast of the screen from being lowered due to external light incident from the first substrate 11 in the PDP 1, a black low-melting-point glass is interposed between the pair of the X electrode EX and the Y electrode EY on the first substrate 11. A layer (black stripe) may be provided.

FIG. 32 is a schematic diagram showing the arrangement of the respective phosphors as viewed from the display surface S side. In a color plasma display device, as shown in FIG. 32, red (R), green (G) and blue (B) corresponding to the three primary colors of red phosphor 28R, green phosphor 28G, and blue phosphor 28B (the alphabet of symbols corresponds to the emission color, and the above-mentioned fluorescence The body 28 is a unit light-emitting region EU having a generic name of these three color phosphors), and color reproduction is performed by adding color light emitted from the unit light-emitting region EU corresponding to each primary color. The red phosphor 28R is made of, for example, (Y, Gd) BO ₃ : Eu ³⁺ , the green phosphor 28G is made of, for example, Zn ₂ SiO ₄ : Mn, and the blue phosphor 28B is made of For example, it is made of BaMgAl ₁₄ O ₂₃ : Eu ²⁺ .

  In addition, the material composition of the phosphor is selected so that the light emission from the unit light emission region EU corresponding to each primary color is simultaneously emitted (excited) under the same conditions, so that the mixed color of the three colors becomes white, A normal white color temperature of about 6000K (a slightly reddish white) is realized.

Japanese Patent Laid-Open No. 10-308179 Japanese Patent Laid-Open No. 10-255666 JP-A-10-188819

  Since the conventional plasma display panel is configured as described above, it has the following problems.

  That is, when it is desired to obtain a so-called white display with a high color temperature, for example, an image with a high color temperature such as bluish white, such as 9300K, it is necessary to increase the degree of light emission of blue (green In the conventional apparatus, as shown in FIG. 32, the size of the region emitting blue light is about the same as the size of the other red and green light emitting regions, Since the blue light emission intensity was relatively low due to the characteristics of the phosphor, display with a low color temperature was unavoidable.

  For the purpose of relatively increasing the blue emission intensity, the number of blue gradations is made larger than the number of red and green gradations, or the red and green gradations are compared with the blue gradations. However, the red and green gradations are reduced from the previous ones (for example, 256 gradations are used, blue is 256 gradations, and red and green are 128 gradations). ) And the gradation expression of red and green are narrowed, and good color image display cannot be performed. In addition, if the amount of ultraviolet light applied to the blue phosphor is increased compared to the red and green phosphors in order to increase the amount of blue light emitted, the degradation of the blue phosphor will cause the red and green phosphors to deteriorate. It becomes larger than the degree of deterioration of the body.

  In view of the above-described problems, the present invention provides a white display with a high color temperature, for example, a color temperature of 9300K, without increasing the deterioration of the phosphor and sacrificing the red and green gradations. An object of the present invention is to provide a plasma display panel and a plasma display device that can be realized without any problems.

  The subject of the present invention is a first substrate, a plurality of display electrodes formed on the inner surface of the first substrate in a first direction, and a plurality formed in a second direction intersecting the first direction. A second substrate that sandwiches a discharge space so that a plurality of pixels are each composed of unit light-emitting regions corresponding to red, blue, and green light-emitting colors, together with the first substrate, The phosphors of each emission color provided corresponding to each of the plurality of address electrodes so that each emission color can emit light, and provided on the second substrate so as to extend in the second direction. A plurality of partition walls spaced apart in the first direction so that a substantial separation interval corresponding to at least one of the emission colors differs from a separation interval corresponding to the other emission colors. And a plurality of addresses. A portion of each of the poles in the display light emitting cell is disposed so as to be located at a substantially center between the partition walls adjacent to the address electrode in the plurality of partition walls, and each of the plurality of address electrodes. The terminal portions are formed on end portions of the second substrate so as to be sequentially arranged at equal intervals.

  Hereinafter, various embodiments of the subject of the present invention will be described in detail along with the effects and advantages thereof with reference to the accompanying drawings.

  According to the subject of the present invention, it is possible to prevent the pitch of the electrode arrangement of the substrate outside the panel to be connected to the terminal portion of each address electrode from becoming an unequal pitch.

  Hereinafter, an AC surface discharge type plasma display panel and an AC type plasma display apparatus using the same according to the present invention will be described in detail with reference to the drawings showing each embodiment. In the following drawings, the same reference numerals as those in FIGS. 29 to 32 indicate the same or equivalent ones as the conventional ones.

(Embodiment 1)
FIG. 1 is a perspective view showing a sectional structure of a main part of a surface discharge type plasma display panel (hereinafter referred to as PDP) according to the present invention in an exploded manner for convenience of explanation. In FIG. A first substrate that is a front substrate, 17 is a dielectric layer, 18 is a protective layer such as MgO, 21 is a second substrate that is a back substrate, and 22 is a write electrode or an A electrode.

38R is a phosphor that emits red (R) light, 38B is a phosphor that emits blue (B) light, 38G is a phosphor that emits green (G) light, and a phosphor for red 38R, blue phosphor 38B, and green phosphor 38G are collectively referred to as phosphor 38. In the present embodiment, as described later, the width of the blue phosphor 38B in the first direction D1 is wider than the width of the red phosphor 38R and the green phosphor 38G in the first direction D1. There is a feature in that. The red phosphor 28R is made of, for example, (Y, Gd) BO ³ : Eu ³⁺ , the green phosphor 28G is made of, for example, Zn ₂ SiO ₄ : Mn, and the blue phosphor 28B is made of For example, it consists of BaMgAl ₁₄ O ₂₃ : Eu ²⁺ , BaMgAl ₁₀ O ₁₇ : Eu ^{2+ and the} like.

  In addition, here, the width of each A electrode 22 in the first direction D1 is set to the same width regardless of the width of each color phosphor 38 in the first direction D1. That is, by setting the widths of all the A electrodes 22 to approximately the same size, even when the A electrodes 22 are formed by screen printing, for example, the printing conditions for the A electrodes 22 can be made the same. When forming the A electrode 22, there is an advantage that disconnection, electrode thickening, thinning, and the like hardly occur.

  29 is a partition wall, 30 is a discharge space, 41 is a transparent electrode, 42 is a metal electrode (bus electrode), EG is a pixel, and one pixel EG is each color of red (R), blue (B), and green (G) Are composed of unit light emitting areas EU (38R), EU (38B), and EU (38G). The unit light emitting areas EU (38R), EU (38B), and EU (38G) for each color are collectively referred to as unit light emitting areas EU.

  S is a display surface, EX and EY are arranged on the inner surface of the first substrate 11 in parallel with each other at a predetermined interval, and an X electrode EX extending in a first direction D1 during which display discharge occurs. This is a Y electrode EY, and both the X electrode EX and the Y electrode EY are composed of a transparent electrode 41 and a metal electrode 42.

  Hereinafter, the panel structure of the PDP 1 and the state of discharge will be described. Since the same configuration as the conventional one can be used for driving the PDP 1, its operation will be described with the aid of FIG.

  The plasma display device 100 includes a PDP 1 and a drive control system 2 electrically connected to the PDP 1 via a flexible printed wiring board (hereinafter referred to as an FPC board) for driving the plasma display apparatus 100.

  In the drive control system 2, the input signal is converted from analog to digital by the A / D 120, and in response to the digital image signal stored in the frame memory 130 that stores the digital output from the A / D 120, An output is supplied to each of the X electrode drive circuit 141, the Y electrode drive circuit 142, and the A electrode drive circuit 143, and the PDP 1 is driven.

  Note that the driving waveform described with reference to FIG. 30 in the prior art is used as a driving waveform for driving the plasma display device (hereinafter also referred to as a PDP device) having the PDP 1 according to the first embodiment. Of course, various other driving waveforms can be used.

  The PDP 1 is a surface discharge type PDP having a three-electrode structure in which a pair of display electrodes, that is, an X electrode EX and a Y electrode EY, and an A electrode 22 are associated with a unit light emitting region EU. The X electrode EX and the Y electrode EY are both It is composed of a transparent electrode 41 and a metal electrode 42 and is disposed on the inner surface of the first substrate 11 on the display surface S side.

  On the dielectric layer 17 covering the X electrode EX and the Y electrode EY, deterioration of the dielectric layer 17 due to collision of ions generated during discharge is prevented, and electron emission during discharge is smoothly performed. A protective layer 18 is provided to stabilize the discharge.

  On the other hand, a partition wall 29 is formed on the second substrate 21 so as to extend in a second direction D2 orthogonal to the first direction D1 and the top of which abuts against the protective layer 18. The discharge space 30 is substantially defined by the opposing inner side surfaces of the partition walls 29, the inner surface of the first substrate 11, and the inner surface of the second substrate 21. Therefore, as shown in the arrangement relationship between the pixel EG (substantially square) and the unit light emitting region EU as viewed from the display surface S shown in FIG. 2, the discharge space 30 is formed in each unit light emitting region EU (substantially rectangular). Here, it is substantially square by a set of unit light emitting areas EU (38R), EU (38B), EU (38G) corresponding to three colors of red (R), green (G) and blue (B). One pixel EG is configured. The width of the blue unit light emitting region EU (38B) in the first direction D1 is wider than the width of the red unit light emitting region EU (38R) and the green unit light emitting region EU (38G) in the first direction D1. It has become.

  In FIG. 1, an A electrode 22 having a predetermined width by silver paste pattern printing and baking is disposed between the partition walls 29 and 29 arranged in parallel in the first direction D <b> 1. A substantially U-shaped phosphor 38 is provided so as to cover the opposing inner side surfaces of the partition walls 29, 29, the inner surface of the second substrate 21, and the A electrode 22 except for the tops and the vicinity thereof.

  Hereinafter, the width in the first direction D1 of the blue unit light-emitting region EU (38B), which is a feature of the present embodiment, is the red unit light-emitting region EU (38R) and the green unit light-emitting region EU (38G). An explanation will be given of the fact that they are formed wider than those.

FIG. 3 schematically shows the relationship between the phosphor 38 and the luminance distribution immediately after the display surface S viewed from the display surface S side. The luminance distribution of the fluorescence generated from the phosphor 38 is considered to be approximately as follows.
When fluorescence is generated by the incidence of ultraviolet rays on the phosphor 38, as shown in FIG. 3, the fluorescence luminance component from the phosphor 38 near the partition walls 29, 29 and the phosphor 38 on the A electrode 22 are It can be divided into the luminance component of the light emitted from the phosphor 38 on the second substrate 21 including.

  That is, on the upper side of the partition wall 29, the phosphor 38 has a small film thickness, so that the luminance is low (corresponding to the portion a in FIG. 3). Further, on the lower side of the partition wall 29, light is emitted from both the phosphor 38 attached to the lower part of the partition wall 29 and the phosphor 38 attached to the surface (inner surface) of the second substrate 21 in the vicinity of the lower part of the partition wall 29. Since the light emission generated in each part is reflected (inter-reflected) by the respective phosphors 38, 38, it shows a slightly higher luminance (corresponding to the part b in FIG. 3). Above the surface of the second substrate 21 that is far from the partition wall 29 (including above the A electrode 22), the luminance is substantially constant (corresponding to a portion c in FIG. 3). Here, when the distance between the partition walls 29 is increased, the luminance in the vicinity of the partition wall 29 (corresponding to the portions a and b in FIG. 3) hardly changes, but is separated from the partition wall 29 (A electrode 22). The portion of the brightness (corresponding to symbol c in FIG. 3) above the surface of the second substrate 21 (including the upper side) increases so as to be proportional to the interval between the partition walls 29 and 29. For this reason, it may be considered that the luminous intensity in the direction of the display surface S is substantially proportional to the interval between the partition walls 29, 29. This is equivalent to increasing the area of the phosphor 38 as described below. .

  Therefore, in order to increase the blue luminous intensity as compared with the red and green light emission, the area of the blue phosphor 38 attached to the second substrate 21 and the A electrode 22 may be increased.

  Further, the shape of the pixel EG is substantially square, and this pixel EG is composed of three unit light emitting regions each having a rectangular shape. Therefore, the width of the blue phosphor 38B along the first direction D1 (blue When the unit light emitting region EU (38B) is changed in width in the first direction D1, the area of the unit light emitting region EU (38B) also changes in proportion. Therefore, it can be said that the change in the width of the blue phosphor 38B is substantially proportional to the change in luminous intensity toward the display surface S.

  FIG. 4 is a schematic diagram showing an example of a cross-sectional shape when the second substrate 21 and the partition wall 29 formed on the inner surface thereof are cut along a plane perpendicular to the second direction D2.

  (A) in the drawing is an example of the partition wall 29 having a rectangular cross-sectional shape.

  (B) in the figure is an example of the partition wall 29 whose cross-sectional shape is formed in an inverted U shape.

  (C) in the figure is an example of the partition wall 29 whose cross-sectional shape is formed in an Ω shape.

  (D) in the figure is an example of the partition wall 29 having a trapezoidal cross section.

  As shown in the examples of (a) to (d), basically, the maximum interval (separation interval) between the bottoms of the adjacent partition walls 29 and 29 is regarded as the width δ of the phosphor 38. In the square pixel EG, description will be made by paying attention to the width of the phosphor 38.

  FIG. 5 is a cross-sectional view of the main structure of the PDP 1, and FIG. 5A shows a cross-sectional view of the main structure related to the PDP 1 described in this embodiment.

  FIG. 5B is a cross-sectional view of the main structure of a conventional PDP shown for comparison with FIG.

  In the PDP used for displaying a color image, as shown in FIGS. 5A and 5B, the phosphors 38 and 28 emit light of the three primary colors so that the three primary colors can be obtained. And red phosphors 38R and 28R, green phosphors 38G and 28G, and blue phosphors 38B and 28B. In the following description, the width of each color in the first direction D1 corresponds to the phosphors of the red phosphors 38R and 28R, the green phosphors 38G and 28G, and the blue phosphors 38B and 28B. Explanation will be given as δ (R), δ (G) and δ (B). In the following description, the width of the phosphor when the phosphor type is Z is expressed as δ (Z).

  As described above, the intensity of the light emitted from each unit light emitting region EU to the display surface S side is approximately proportional to the distance between the inner surfaces of the partition walls 29 and 29, as shown in FIG. In the prior art, the ratio of the widths of the phosphors of red (R), green (G) and blue (B) is δ (R): δ (G): δ (B) = 1: 1: 1. Yes, the luminance ratio of each color of red (R), green (G) and blue (B) in the whole pixel when the light emission from the unit light emission region EU corresponding to each primary color is simultaneously emitted (excited) under the same conditions. Is about 0.51: 1: 0.22. Here, Table 1 and FIG. 6 show changes in color temperature values when the widths of the phosphors of red (R) and green (G) are fixed and the width of the phosphor of blue (B) is changed. .

Further, the color for a when the ratio of the width δ (B) of the blue (B) phosphor to the widths δ (R) and δ (G) of the red (R) and green (G) phosphors is a. When the temperature value b is approximated by a quadratic curve, approximately,
b = 1094.6a ² + 115.22a + 4795.1 K (Kelvin)
According to the study by the inventors, when a = 2, b = about 9300K (a slightly bluish white).

  Accordingly, the luminance level in each unit light emitting region EU is proportional to the area of the unit light emitting region EU. In this case, the area ratio is proportional to the length in the first direction D1, so that the color temperature is from 6000K. In order to change to 9300K, the width δ (B) of the blue (B) phosphor should be doubled or close to the width of the red (R) and green (G) phosphors. .

  From the viewpoint of improving luminance, it can be said that the shorter the width dimension of the partition wall 29 in the first direction D1, the better. In such an ideal case, that is, the width dimension of the partition wall 29 is one pixel EG. In the case where the width dimension in the first direction D1 is negligibly small, the substantial separation distance between the two partition walls 29 that define the blue unit light emitting region EU (38B) is a color temperature of 9300K. In some cases, it can be regarded as corresponding to about ½ of the width dimension of one pixel EG.

  By configuring as described above, it is generally preferable to realize white light with a predetermined color temperature without sacrificing the red and green gradations and without increasing the deterioration of the phosphor. For example, white light having a color temperature of about 9300K can be obtained.

  Of course, as shown here, in order to realize the color temperature of 9300K, the luminance ratio of each color of red (R), green (G) and blue (B) in the whole pixel is about 0.51: 1: 0.44. Therefore, δ (R): δ (G): δ (B) = 1: 1: 2, but white light having a desired color temperature in consideration of the characteristics of the phosphor material and various conditions In order to obtain the above, the ratio of the width δ corresponding to each emission color that meets each condition may be set.

  In addition, the display may be performed with the blue gradation being lowered in the current state of, for example, 6000K, and with such a configuration, the amount of ultraviolet rays irradiated to the blue phosphor is about half that of the conventional one. Therefore, it is possible to extend the lifetime of the blue phosphor, and it is possible to obtain a PDP having excellent long-term color reproducibility.

(Embodiment 2)
In the first embodiment, the unit light emission region EU corresponding to blue (B) is approximately twice the width of the red (R) and green (G) unit light emission regions EU. Although configured, the pixel EG may have a plurality of blue (B) regions. Hereinafter, the case where the pixel EG has a plurality of blue (B) regions will be described with reference to the drawings described later.

  FIG. 7 is a perspective view showing the main structure of the PDP 1 for explaining the second embodiment. In the figure, 38Ba and 38Bb are divided into two blue phosphors provided in one pixel EG. Each region is shown, and the respective widths are δ (Ba) and δ (Bb). Further, the arrangement of the phosphors in one pixel EG is red (R) blue (Ba) green (G) blue (Bb) from left to right along the first direction in FIG.

  The blue phosphor regions 38Ba and 38Bb have, for example, two blue phosphor regions each having the same width as δ (R) or δ (G) as described in the first embodiment. Configure as follows. In this way, the same mask pattern can be used in the phosphor attaching step.

  In this case, as shown in FIG. 8, δ (R): δ (Ba): δ (G): δ (Bb) = 1: 1: 1: 1, so that each unit light emitting region EU is the first in the pixel EG. It has a width that is substantially divided into four in one direction. Further, in the pixel EG, δ (Ba) + δ (Bb) may be considered to be a substantial width of the blue (B) emission color with respect to the blue (B) emission color, and δ (Ba) + δ (Bb) = Δ (B) and substantially δ (R): δ (G): δ (B) = 1: 1: 2. This relationship satisfies the relationship for achieving the color temperature described in the first embodiment.

  Further, by arranging phosphors such as red (R) blue (Ba) green (G) blue (Bb) as described above, there are further advantageous aspects as described below (hereinafter referred to as red). For example, red phosphor, blue phosphor, Ba or Bb, green phosphor G, and red phosphor, blue phosphor, green phosphor, blue fluorescence contained in one pixel EG. A series (sequence) of bodies is represented as R-Ba-G-Bb). In addition, the relationship between the arrangement | sequence of each following fluorescent substance and a brightness | luminance is typically shown in FIGS. 9-14. In each figure, a portion surrounded by a dotted line represents a pixel EG, and a portion surrounded by a solid line represents a unit light emitting region EU. The screen in the PDP 1 is composed of a plurality of pixels EG, and the pixel EG in this case includes four unit light emitting regions. It consists of areas.

9 to 14 are schematic views showing the arrangement of the respective phosphors as viewed from the display surface S side, and will be described below with reference to the drawings (in the following description, the portion enclosed in [] is included in one pixel EG). Represents the arrangement of unit light emitting areas EU corresponding to each color), and the arrangement of the phosphors of PDP1 is set to one pixel EG and the color arrangement of G-Ba-R-Bb as one unit.
B) [G-Ba-R-Bb]-[G-Ba ...
... R-Bb]-[G-Ba-R-Bb] (see FIG. 9)
B) [Ba-R-Bb-G]-[Ba-R ...
... Bb-G]-[Ba-R-Bb-G] (see FIG. 10)
9), green (G) is arranged at the left end of the screen shown in FIG. 9 and green (G) is arranged at the right end of the screen shown in FIG. 10 in (b). Since the color is highly visible (wavelength is around 550 nm), for example, when a white display is performed on the entire screen, in the case of b), the left edge of the screen, and in the case of b) a high luminance at the right edge of the screen. Since there is a green part, it may be felt that there is a green line (green coloring line).

Therefore, instead of the above a) or b),
C) [Ba-R-G-Bb]-[Ba-R ...
... G-Bb]-[Ba-R-G-Bb] (see FIG. 11)
D) [Ba-GR-Bb]-[Ba-G ...
... R-Bb]-[Ba-GR-Bb] (see FIG. 12)
Or e) [R-Ba-G-Bb]-[R-Ba...
... G-Bb]-[R-Ba-G-Bb] (see FIG. 13)
F) [Ba-G-Bb-R]-[Ba-G ...
... Bb-R]-[Ba-G-Bb-R] (see FIG. 14)
However, in the case of c) or d), "...- GR -..." or "...- RG -..." Are arranged in the center of the pixel EG, and it is felt that there is a yellowish line (yellow coloring line) in the center, or adjacent parts of adjacent pixels EG. Are arranged as “... -Bb]-[Ba-...”, The blue portion exists over the adjacent pixels EG, and there is a blue line (blue coloring line). May be felt.

  On the other hand, in the case of e) or f), green with higher relative visibility than the above a) to d) does not exist at the edge of the screen, and green and red appear in the center. Since it is not unevenly distributed in the center of the pixel or the same color region is not adjacent between adjacent pixels, there is no unnatural coloring line, which is excellent when performing image display.

  As described above, by providing a plurality of blue unit light emitting regions EU for one pixel EG, it is possible to increase blue light emission with a simple configuration, and to adjust the red and green gradations. A PDP with good color reproduction of image display can be obtained without dropping, and further, by considering the arrangement of the phosphors, an unnatural color line is not felt, and the influence of color interference between the pixels EG It is possible to obtain a PDP suitable for image display such as no image.

  In the configuration described above, an image having a high color temperature can be obtained. However, the current color temperature display state is obtained, and one of the two blue unit light-emitting regions EU (Ba) or EU (Bb) is displayed. In order to emit light exclusively and continue to emit the other blue unit light emitting region after a predetermined period of time elapses, or to extend the lifetime of the blue phosphor, the unit light emitting region EU (Ba) for each frame of the image, The unit light emitting areas EU (Bb) may be configured to emit light alternately. By doing so, the amount of ultraviolet rays applied to the blue phosphor constituting each unit light emitting region EU (Ba) or EU (Bb) can be reduced to about half that of the conventional one, and therefore, particularly blue. Thus, it is possible to obtain a PDP having a long-term color reproducibility. In the above description, an example in which the pixel EG is divided into approximately four parts has been described. However, the present invention is not necessarily limited to this, and the pixel EG may be divided into more than that, and further does not necessarily have to be equally divided.

(Embodiment 3)
In a PDP device, a filter is generally provided as a part of a housing in front of the display surface of the PDP in order to prevent external light such as indoor lighting from being reflected on the panel surface and reducing display contrast. Many. Therefore, in the conventional PDP device, the color temperature is increased by using a bluish filter having a high blue transmittance for the filter for preventing a decrease in display contrast. Such an effect can be realized in the same way by configuring the display-side first substrate itself as a bluish colored glass.

  However, when such a method is used, the red display and the green display are also affected by the blue filter or the colored glass, so that the color changes, and a problem that pure red or green cannot be obtained is caused. In addition, since the screen of the PDP device in a state where the power is turned off appears to be bluish, there is a problem that the decorativeness in the room where the PDP device is installed is impaired when not in use.

  However, when the PDP having the structure of the first and second embodiments described above is employed, a display contrast reduction preventing filter can be realized without causing such problems. A proposal regarding this point is the present embodiment.

  That is, in the PDP 1 having the structure of the first and second embodiments, since the area of the substantial (unit) light emitting region of blue is larger than those of green and red, relative to the intensities of red and green. In particular, the PDP 1 has a characteristic that the intensity of blue light emission is high, and the white color temperature is high in the first place. Therefore, as shown in FIG. 15, a so-called ND (neutral density) having no wavelength characteristic of transmittance is used instead of using a blue filter as a display contrast reduction preventing filter disposed in front of the display surface S of the PDP 1. A filter 51 can be used. Since the color tone of the ND filter 51 is achromatic gray, even if the filter 51 is provided on the front side of the housing 50, the decorativeness is generally not impaired. In addition, since the filter 51 does not affect the red and green of the display light emission and uses the PDP 1 of the first or second embodiment, it is possible to realize a good image display with a high color temperature.

  Note that reference numeral 52 in FIG. 15 is a portion that houses the drive control system 2 shown in FIG. 29, and this portion 52 is disposed in a portion in the casing 50 on the back panel 1P2 side that is bonded to the front panel 1P1. Is done.

(Modification)
Furthermore, as a modification of the present embodiment, the first substrate 11 may be colored gray to replace the ND filter 51 of FIG. 15, and the same effect can be obtained.

  As described above, the first feature point of the present embodiment is that a filter plate (for example, ND, for example) having a spectrum with substantially uniform transmittance with respect to each wavelength in the visible light emission wavelength region on the front side of the display surface S of the PDP 1. The filter 51) is provided.

  In addition, the second feature point is that, as the first substrate on the display surface side of the PDP 1, a substrate having a substantially uniform spectrum with respect to each wavelength in the visible light emission wavelength region, for example, glass colored in gray The substrate is used.

(Embodiment 4)
Here, when attention is paid to the color purity of the three primary colors of the PDP, there are generally the following problems. That is, in order to extend the life due to electrode wear, a large amount of Ne is mixed in the discharge gas of the PDP. Therefore, Ne-specific orange light emission is mixed with display light from each phosphor, and as a result, the color purity of the emission color of each discharge cell is lowered.

  Therefore, as a method for solving this problem and improving the color purity of each emission color, a transmission spectrum corresponding to a desired emission color is provided at a position corresponding to red R, green G, and blue B on the first substrate. It has been proposed to form a built-in filter with. However, when this method is used, since three types of filter materials must be formed with high positional accuracy, the number of steps is large and the yield tends to be low, and generally a large cost is required.

  Therefore, as a second best measure, it is conceivable to focus only on the blue color that is most strongly affected by the Ne light emission, and to form the above blue transmission filter only on the blue light emitting region. According to this, a process can be simplified greatly and cost can be reduced. However, even with a blue transmission filter, it is difficult to completely transmit blue light, and it is inevitable that blue light itself is absorbed to a considerable degree when Ne light emission is absorbed. Moreover, even if the above-mentioned improvement measures are applied to the conventional PDP structure, since the blue light emission is weaker than red and green, the color temperature in the white display is even lower even though the color purity can be improved. There is a problem of becoming.

  On the other hand, when the PDP 1 according to the first or second embodiment is adopted as the PDP, the influence of Ne light emission on the blue light emission color can be effectively removed without causing such a problem. Realizing this point is a characteristic point of the present embodiment.

  That is, the PDP 1 having the structure shown in FIG. 1 has a relatively large blue emission intensity compared to red and green because the area of the substantial (unit) emission region of blue is wider than those of red and green. It has characteristics. Therefore, as shown in FIGS. 16A and 16B, the blue filter is located at a position corresponding to the blue unit light emitting region within the dielectric 17 formed on the inner surface of the first substrate 11. 53 is formed.

  Thus, the present PDP can have a relatively sufficiently high blue luminance even when the transmittance of Ne light emission is greatly reduced. That is, green and red light emission colors, which are less affected by the decrease in color purity due to Ne light emission, are radiated from the panel as they are without going through the Ne light emission absorption filter, while the blue light emission color is temporarily interposed with the filter. The light after removing the Ne luminescence is emitted from the panel. In this case, since the PDP 1 according to the first embodiment is basically used, the intensity of the blue light emitted from the blue phosphor 38B is sufficiently larger than that of the conventional PDP, and is somewhat attenuated by the blue filter 53. Even if received, the intensity of the blue light emitted from the panel is sufficiently large. As a result, it is possible to realize a PDP with good blue color purity and high color temperature for white display. In addition, since only a blue filter needs to be provided, an increase in cost that occurs in the manufacturing process can be minimized.

  In the PDP of FIG. 16, an example in which the blue filter 53 is provided for the PDP 1 of FIG. 1 is shown. However, the structure of the PDP 1 of the second embodiment as illustrated in FIG. Needless to say, the filter 53 can be provided.

  As described above, the PDP according to the present embodiment is the same as the PDP 1 according to the first or second embodiment, on the inner surface of the region corresponding to the blue light emitting cell in the inner surface of the first substrate that is the substrate on the display surface side of the PDP. This is characterized in that a filter 53 having a spectrum whose transmittance is high for the wavelength of blue light and whose transmittance is low for the wavelength of red light is provided inside the dielectric layer 17 formed in FIG.

  The arrangement position of the blue filter 53 is not limited to the inside of the dielectric layer 17 (of course, as shown in FIG. 16B, a planar region sandwiched between the opposing bus electrodes 42 in one display line. (It is most preferable that the blue filter 53 having an area sufficient to cover the maximum area through which light is transmitted toward the display surface S is disposed inside the dielectric layer 17). For example, a blue filter may be provided only on the inner surface of the first substrate 11 sandwiched between the opposing transparent electrodes 41 of one display line. In addition to the inner surface, both the X and Y electrodes EX, A blue filter may be provided so as to cover the surface of EY, and further, a blue filter may be provided at a position in the first substrate 11 facing the blue light emitting cell. In short, the blue filter having the above transmission spectral characteristics may be disposed at a position in the front panel 1P1 corresponding to the blue unit light emitting region.

(Embodiment 5)
The present embodiment is a form for improving a new problem caused by adopting the PDP 1 of the first embodiment.

  That is, in the PDP 1 having the structure of FIG. 1, as a result, the intervals between the adjacent A electrodes 22 become unequal pitches (see FIG. 17). One end portion (terminal portion) of the A electrode 22 is not covered with the phosphor 38 (by a glaze layer in FIG. 28 described later), and is connected to an electrode of an FPC plate (not shown) at the second substrate end portion. Thus, it must be electrically connected to the A electrode drive circuit 143 of FIG. 29 via the FPC board. However, it is not impossible at all to connect the FPC plate and the terminal portion of the A electrode 22 after aligning the electrode arrangement of the FPC plate with the unequal pitch of the A electrode 22 as follows. Cause problems. That is, in general, the average pitch of the A electrodes is often 0.5 mm or less, and in order to use the PDP device as a high-resolution display device such as a HDTV (High Definition TV), It is necessary to make the pitch about 0.2 mm. In this case, the insulation distance of the wiring in the FPC board is about 0. lmm or so. In addition, a voltage of about 50 V to 70 V is applied to the A electrode as a signal. However, 100 V is the limit when the insulation withstand voltage of an FPC board that is generally used at present is 0.1 mm. For this reason, adopting the PDP 1 of FIG. 1, that is, providing a narrower insulation distance on the FPC board with unequal pitches between adjacent A electrodes, ensures reliability against dielectric breakdown. It becomes a big obstacle.

  Therefore, in order to solve this problem, in the present embodiment, the shape of the terminal portion is improved so that the terminal portions of the A electrode 22 are arranged at substantially equal intervals at the end portion of the second substrate. ing. At this time, in order to improve practicality, the terminal group of the A electrodes may be divided into several blocks according to the width of each FPC board to be connected.

  An example is shown in FIG. In FIG. 18, the shape of the terminal portion 22EB of the A electrode 22 corresponding to blue having a wide width in the first direction D1 of the unit light emitting region is set to a straight line, while the terminal of each A electrode 22 corresponding to green and red Each of the terminal portions 22E connected to the corresponding electrode in the FPC board (not shown) by bending a part of the shape of the portions 22EG and 22ER toward the terminal portion 22EB side of the adjacent blue A electrode 22 in the same pixel. And the vicinity thereof are arranged at an equal pitch d. W is the width of the terminal portion 22E. This makes it possible to solve the above problems.

(Embodiment 6)
This embodiment relates to the improvement of the second embodiment. In the following, a problem newly generated by adopting the PDP 1 of the second embodiment is described, and a solution is proposed.

  For example, in the PDP 1 shown in FIG. 7, the color components of the four stripe-shaped unit light emitting regions EU forming one pixel EG are arranged as RBGB, but two blue (B) unit light emitting regions EU ( Since 38Ba) and EU (38Bb) correspond to one pixel EG, the display of PDP1 may be performed by applying the same signal to the A electrode 22 in both regions EU (38Ba) and EU (38Bb). It will be. However, when the same signal is used for the A electrodes 22 of both regions EU (38Ba) and EU (38Bb), each of the plurality of address driver ICs constituting the A electrode driving circuit (hereinafter referred to as an address driver) 143 is used. If the output terminals are simply assigned to the terminal portions of the respective A electrodes 22, the number of ICs increases, resulting in an increase in cost. Therefore, the A electrodes 22 of the two blue (B) unit light emitting areas EU (38Ba) and EU (38Bb) in one pixel EG are electrically connected to each other, and one terminal of one corresponding address driver IC. It is necessary to consider reducing the total number of address driver ICs to 3/4 by associating these with the A electrodes 22 of both regions EU (38Ba) and EU (38Bb) of one pixel EG. However, in order to realize this configuration on the second substrate 21 of the PDP 1, it is necessary to provide electrode lines including a three-dimensional intersection on the second substrate 21. Although such wiring is not technically impossible, the second substrate 21 is usually a glass substrate, and the A electrode 22 is made of metal, that is, the back panel is made of a heat-resistant inorganic material. Therefore, forming the circuit wiring including the three-dimensional intersection on the inner surface of the second substrate 21 increases the heat treatment process and increases the cost.

A. Solution 1
Therefore, as a first method for realizing circuit wiring including a three-dimensional intersection at a low cost, the above three-dimensional intersection is performed in a wiring portion in an address driver circuit board (for example, a printed circuit board) mounted on the back panel side of the PDP 1. It is conceivable to realize wiring. An example of such wiring is shown in FIG. The electrical connection shown in FIG. 19 is as follows.

  That is, each output terminal of the plurality of address driver ICs 54 mounted on the address driver circuit board 57 is applied to the A electrode 22 of the red unit light emitting region EU (38R) corresponding to each pixel EG. Common signal signal to be applied to the red signal wiring (second signal wiring) 55R1,..., 55Rm-3 for transmitting the power signal, and the A electrode 22 of the blue unit light emitting areas EU (38Ba), EU (38Bb). Green signal wiring (second signal wiring) (second first signal wiring) 55B2,..., 55Bm-2 and a green signal wiring (second wiring) for transmitting a signal to be applied to the A electrode 22 of the green unit light emitting region EU (38G). Signal wirings 55B3,..., 55Gm-1 correspond to the corresponding output terminals (TA1,..., TAm-3), (TA2,..., TAm-2), (TA3,. Until It is extended formed on the substrate 57. As a characteristic point, each of the blue signal wirings 55B2,..., 55Bm-2 has a first blue signal wiring (corresponding to the other branch signal line) 55Ba2,. Branches into two blue signal wirings (one branch signal line) 55Bb4,..., 55Bbm, and each second blue signal wiring 55Bb4,..., 55Bbm has a green signal wiring 55G3,. -1 and three-dimensional crossing on the same substrate 57, and then on the same substrate 57 toward the corresponding output terminals TA4,..., TAm and in parallel with the adjacent green signal wiring 55G3,. It is formed to extend. Accordingly, the A electrodes 221,..., 22m formed on the second substrate 21 can be extended along the second direction D2 (FIG. 7) without causing a three-dimensional intersection with each other. Note that reference numeral 56 in FIG. 19 denotes an FPC board.

  In the address driver circuit board 57, the board 57 is a multilayer structure board and is electrically connected through through-holes between the multilayer structures, or the board 57 is a double-sided wiring board and is connected between the front and back surfaces. By using a method of using an electrical connection through a through hole, etc., a three-dimensional intersection between the blue signal wiring 55Baj (j is a multiple of 4) and the adjacent green wiring 55Gj + 1 as shown in FIG. It can be easily configured.

  In this way, all of the wiring on the second substrate 21 of the PDP 1 related to the A electrode 22 and the wiring on the FPC board 56 side can be electrically separated from each other without three-dimensionally crossing each other. Same as output terminal TA2, TA4,..., TAm-2, TAm side of address driver circuit board 57 with respect to the terminal portion of A electrode 22 related to blue unit light emitting areas EU (38Ba), EU (38Bb) of the same pixel EG. Can be output. Thereby, an inexpensive and high color temperature PDP device can be realized.

  The idea in this solution is applicable not only to the case of FIG. 7 but also to all other modified examples described in the second embodiment. In this case, one of the branched blue signal wirings crosses the signal wirings of the other colors only once or twice (for example, in the case of the color array BRGB).

B. Solution 2
As another solution to the above problem, it is considered that a red and green dedicated address driver circuit board and a blue dedicated circuit board are provided on both sides of the second board facing each other in the second direction. It is done. An example in which this method is applied to the PDP 1 in FIG. 7 is schematically shown in FIG. 20 drawn using a top view form of the PDP and a block diagram form on the circuit board side.

  In FIG. 20, 58 is a first address driver circuit board dedicated to red and green, and an R & G address driver (consisting of at least one IC) 59 is mounted on the board 58. Among the side surfaces orthogonal to the second direction D <b> 2 of the second substrate 21, the second substrate 21 is disposed outside the side surface where the terminal portions of the exposed red and green A electrodes 22 are disposed. On the other hand, the second address driver circuit board 61 dedicated to blue is the terminals of the A electrodes 221, 223, 225, 227,..., 22m-3, 22m-1 of the blue unit light emitting areas EU (38Ba), EU (38Bb). The portion (exposed) is disposed on the outer side of the opposing side surface of the second substrate 21. A B address driver (consisting of at least one IC) 61 is mounted on the substrate 60, and one output terminal of the driver 61 is provided with two blue unit light emitting areas EU (38Ba) in one pixel. , EU (38Bb), both A electrodes 22 ((221, 223), (225, 227), ..., (22m-3, 22m-1)). The signal wiring extended from the output terminals of the driver 61 on the substrate 60 is in the middle of the signal lines A of the two blue unit light emitting areas EU (38Ba) and EU (38Bb) in one pixel. After branching so as to correspond to the electrode 22, each branched signal wiring is connected to corresponding output terminals TA1, TAm-3,..., TAm-3, TAm-1.

  According to this method, although the number of address driver circuit boards increases, the wiring in the first and second address driver circuit boards 58 and 60 can be configured extremely simply as compared with the case of FIG. Become.

(Modification)
In place of the configuration of FIG. 20, as shown in FIG. 21, the terminal portions of the A electrodes 22 of the unit light emission region EU (38Ba) and the unit light emission region EU (38Bb) on the end portion of the second substrate 21 of the PDP 1 22E are electrically connected to each other via the connection pattern portion CPP, and the connection pattern portion CPP between the two A electrodes 22 and the corresponding output terminal of the B address driver 61 in FIG. You may make it connect. At this time, it is not necessary to realize the three-dimensional intersection of the A electrodes 22 on the second substrate 21, and it is only necessary to provide the connection pattern portion CPP. And the influence which arrangement | positioning of the connection pattern part CPP has on manufacturing cost is small, and does not become a problem.

  The second solution can also be applied to another example of the second embodiment.

(Embodiment 7)
This embodiment relates to an improvement of the second embodiment.

  For example, when the arrangement of the emission colors of the unit emission areas is set as BGBRBBGBR... (See FIG. 12), the display can be performed with the four unit emission areas formed of the arrangement BGBR as one pixel. However, when a higher-definition plasma display device is configured using this display method, higher panel manufacturing accuracy is required as compared with the conventional plasma display device having the PDP of FIG. However, the progress of high-definition display devices cannot be avoided due to strong market demand. For this reason, it is necessary to improve the PDP 1 according to the second embodiment for higher definition while maintaining the effect without further increasing the accuracy of panel manufacture.

  By the way, for applications that display natural images, such as received images of regular television broadcasts and movie images, video images have higher resolution than a function that faithfully displays fine characters and figures. Therefore, the function of displaying as a natural image is more important.

  Therefore, it is considered that the above-described improvement can be realized by enhancing the latter function in the PDP 1 of the second embodiment. For this purpose, as shown in the perspective enlarged plan view of FIG. 22, the unit light emission regions EU (38R) and EU (38Ba) are composed of RB arrays (corresponding to the first group) and GB arrays. This can be dealt with by setting a set of two unit light emitting areas EU (38G) and EU (38Bb) (corresponding to the second group) as a display area for one pixel. For example, when a PDP1 having 640 RBGB arrays in the horizontal direction (first direction) is used and an RGB luminance signal corresponding to 1280 pixels in the horizontal direction is input to PDP1, Each luminance signal thus assigned is assigned to two types of pixels EG1 and EG2 each having a color array RB and a color array GB for display. For example, for the pixel EG1 of the color array RB, the display of the pixel EG1 is performed using only the luminance signals of the B and G colors without using the G luminance signal. Similarly, with respect to the pixel EG2 of the other color array GB, the display of the pixel EG2 is performed using only the luminance signals of the B color and the R color without using the G luminance signal. When such a method is used, each pixel EG1 and EG2 has a shortage of colors as a result of the input original luminance signal being reduced to 2/3, and the correct color is displayed for each pixel. That's not to say. However, a normal video image is generally composed of gently continuous signals, and whether or not the entire subject can be faithfully displayed as one object is more problematic than the accuracy of display of a single pixel. Therefore, even if the above-described pixel configuration illustrated in FIG. 22 is used for each PDP 1 (FIGS. 7 and 9 to 14) according to the second embodiment, an image recognized by the naked eye is not recognized by comprehensively displaying the pixels. Rather than being natural, it is possible to realize a high-definition video image by increasing effective resolution. Moreover, since the configuration of the PDP 2 according to the second embodiment is used, a blue-white display image can be realized without increasing phosphor deterioration and without sacrificing red and green gradations. .

(Embodiment 8)
The present embodiment mainly focuses on overcoming problems newly caused by the adoption of the first embodiment. First, this problem will be described in detail below.

  In the first embodiment, as shown in FIG. 1, the width of the A electrode 22 in the first direction D1 is set to be almost constant regardless of the width of the unit light emitting region EU in the first direction D1. .

  However, the discharge start voltage in the discharge space 30 decreases as the width of the unit light emitting region EU in the first direction D1 increases and the discharge space 30 of the unit light emitting region EU expands accordingly. For this reason, the optimum applied voltage differs for each unit light emitting region EU, which causes a problem that driving becomes difficult. For example, when the driving method shown in FIG. 30 is used, if the voltage of the address pulse n2 in the address period is lower than the optimum value, the address discharge becomes incomplete and the cells to be lit do not light up. To occur (lack of writing).

  On the contrary, when the voltage of the address pulse n2 is higher than the optimum value, a so-called self-erasing discharge is generated at the falling edge of the address pulse n2 only by the wall charge, and the wall charge is caused by this self-erasing discharge. As a result of erasing, the problem arises that the lighted cells do not light up (self-erasing).

  Therefore, when the width of the unit light emitting region EU in the first direction D1 is different for each color, in the unit light emitting region having a relatively narrow width, the voltage of the address pulse is relatively insufficient due to the rise of the discharge start voltage. However, writing tends to be insufficient. On the other hand, in the unit light emitting region having a relatively wide width, the voltage of the address pulse becomes relatively excessive due to a decrease in the discharge start voltage, and self-erasing is likely to occur.

  That is, it becomes impossible to apply an address pulse of an appropriate voltage over all the unit light emitting regions, and there arises a problem that either insufficient writing or self-erasing occurs.

  Therefore, in the present embodiment, the unit light emission is set by narrowing the width of the A electrode in the first direction as the width of the unit light emission region in the first direction becomes wider than the PDP in the first embodiment. Regardless of the width dimension of the region in the first direction, the optimum applied voltage in each unit light emitting region can be made substantially the same.

  Hereinafter, the case where the above-described improvement measures are applied to the PDP 1 in FIG. 1 will be specifically described.

  FIG. 23 is a perspective view showing a cross-sectional structure of one pixel of the PDP 1 in the present embodiment.

  In the PDP 1 in FIG. 23, as in the PDP 1 shown in FIG. 1 in the first embodiment, the width of the blue unit light emitting region EU (38B) in the first direction D1 is the red unit light emitting region EU (38R) and This corresponds to a case where the green unit light emitting region EU (38G) is formed wider than the width. Reference numerals 22R, 22G, and 22B denote A electrodes in the unit light emitting areas EU of red (R), green (G), and blue (B), respectively, and the width of the A electrode 22B in the blue unit light emitting area EU (38B). Is set to be narrower than the widths of the A electrodes 22R and 22G in the red and green unit light emitting areas EU (38R) and EU (38G).

  Since the area of the blue unit light emitting region EU (38B) is larger than the areas of the red and green unit light emitting regions EU (38R) and EU (38G), the blue unit light emitting region EU (38B) in the discharge space 30 is used. The discharge start voltage in the portion corresponding to is lower than that of the other colors. Therefore, in the address operation, the optimum value of the address pulse voltage in the blue unit light emitting region EU (38B) is larger than the optimum value of the address pulse voltage in the red and green unit light emitting regions EU (38R) and EU (38G). It is low.

  On the other hand, the thinner the width of the A electrode 22, the weaker the electric field strength in the discharge space 30 when an atressing pulse is applied to the A electrode 22, and this state is substantially the same as when the address pulse voltage is set low. Is equivalent to

  Therefore, in FIG. 23, the optimum value of the address pulse voltage is corrected by intentionally setting the width of the A electrode 22 in the blue unit light emitting region EU (38B) to be narrower than the widths of the A electrodes 22 of other colors. Even when a fixed address pulse voltage is applied to each A electrode 22, the address operation in each unit light emitting region EU is performed under a condition close to the optimum.

  The above-described concept described for the PDP 1 in FIG. 23 is basically applicable to a more general case where the width of the unit light emitting region EU in the first direction D1 is different for each unit light emitting region EU. That is, here, the width of the blue unit light emitting region EU (38B) in the first direction D1 is wider than that of the red unit light emitting region EU (38R) and the green unit light emitting region EU (38G). Although an example has been shown, as already described in the first embodiment, the ratio of the width in the first direction D1 of the unit light emission region EU in each light emission color may be appropriately determined in consideration of various conditions. In this case, the width of the A electrode 22 may be reduced as the width of the unit light emitting region EU in the first direction D1 increases.

  With such a configuration, even if the width of the unit light emitting region EU in the first direction D1 is different for each unit light emitting region EU, insufficient writing due to the applied address pulse voltage being too low, and the address pulse It is possible to avoid self-erasing due to the excessively high voltage, and a stable display image without flickering can be obtained.

(Embodiment 9)
The present embodiment proposes a technique for overcoming problems newly generated by adopting the PDP of the first embodiment.

  Another problem arises when the width of the unit light emitting area of a certain color in the first direction is wider than the width of the unit light emitting area of another color. That is, when an address discharge occurs in the narrower unit light emitting region adjacent to the wider unit light emitting region, a false discharge occurs in the wide unit light emitting region.

  Hereinafter, this problem will be described with reference to FIG. FIG. 24 schematically shows the electric field in the address period on the cut surface along the Y electrode, that is, the electrode to which the scan pulse n1 in FIG. 30 is applied, of the pair of display electrodes X and Y. It is shown in In FIG. 24, the direction and length of the arrow schematically represent the direction of the electric field and the strength of the electric field, respectively. In FIG. 24, the wider unit light emitting region (here, the blue unit light emitting region) in the first direction is OFF (non-light emitting), and the adjacent green unit light emitting region is ON (light emitting). ) State.

  An address pulse of voltage + Va is applied to the A electrode 22G in the ON unit light emitting region, and a scan pulse of voltage −Vy is applied to the Y electrode 41, whereby the A electrode 22G and the Y electrode 41 are interposed. A strong electric field is generated and an address discharge is generated. On the other hand, the voltage of the A electrode 22B in the unit light emitting region in the OFF state is maintained at 0 V, and only a weak electric field is generated. Therefore, no address discharge is generated in a normal operation state. However, when an electric field leaks from the A electrode 22G in the adjacent unit light emitting region in the ON state, a strong electric field is generated at the end of the unit light emitting region in the OFF state (the portion surrounded by the broken line 60 in FIG. 24). May occur, and unnecessary discharge (erroneous discharge) may occur in the unit light emitting region that is originally in the OFF state. In particular, when the unit light emitting region in the OFF state is a relatively wide unit light emitting region (in this case, a blue unit light emitting region), the discharge start voltage in the unit light emitting region is low, and the A in the unit light emitting region is low. Since the width of the electrode is relatively narrow compared to the widths of the unit light emitting regions of other colors, there is a problem that an erroneous discharge is more likely to occur because the electric field guard action by the A electrode described later is weak.

  Therefore, in the present embodiment, contrary to the eighth embodiment, the width of the A electrode 22 is set to increase as the width of the unit light emitting region in the first direction increases.

FIG. 25 is a perspective view showing a cross-sectional structure of one pixel portion of a PDP according to an example of the present embodiment. That is, in the PDP 1 in FIG. 25, as in the PDP 1 shown in FIG. 1 in the first embodiment, the width of the blue unit light emitting region EU (38B) in the first direction D1 is the red unit light emitting region EU (38R). And the green unit light emitting region EU (38G) is formed wider than the width.
In FIG. 25, reference numerals 22R, 22G, and 22B denote A electrodes in the unit light emitting areas EU of red (R), green (G), and blue (B), respectively, and in the blue unit light emitting area EU (38B). The width of the A electrode 22B is set larger than the width of the A electrodes 22R and 22G in the red and green unit light emitting regions EU (38R) and EU (38G).

  In PDP1 of FIG. 25, the schematic diagram of the electric field in the address period in the cut surface along Y electrode EY is shown in FIG. In FIG. 26, similarly to the case shown in FIG. 24, the relatively wide unit light emitting region (here, the blue unit light emitting region) is in the OFF (non-light emitting) state, and the green unit light emitting region adjacent thereto. Is assumed to be in the ON (light emission) state. As shown in FIG. 26, the width of the A electrode 22B in the blue unit light emitting region is wider than the width shown in FIG. 24, so that the electric field leaked from the A electrode 22G in the adjacent green unit light emitting region is blue. Therefore, a strong electric field is not generated in the discharge space in the blue unit light-emitting region. Instead, only a weak electric field governed by the A electrode 22B maintained at a voltage of 0 V remains in the discharge space in the blue unit light emitting region (this phenomenon is referred to as an electric field guarding action by the wide A electrode). .

  The concept in the configuration shown in FIG. 25 and FIG. 26 is also applicable to the case where the width of the unit light emitting region in the first direction is different for each unit light emitting region. It is possible to avoid the problem that erroneous discharge occurs on the wide unit light emitting region side when address discharge occurs in the light emitting region.

  In the above description, the width of the blue unit light emitting region EU (38B) in the first direction D1 is wider than the red unit light emitting region EU (38R) and the green unit light emitting region EU (38G). However, as already described in the first embodiment, the ratio of the widths in the first direction of the unit light emitting regions of the respective light emission colors may be appropriately determined in consideration of various conditions. In this case, the width of the A electrode may be set wider as the width of the unit light emitting region EU in the first direction D1 becomes wider.

  Incidentally, as to whether the address failure or the erroneous discharge becomes a larger problem, other factors such as the type of gas that fills the discharge space, the height of the partition, the flatness of the top of the partition, the A electrode It depends on various conditions such as position accuracy. That is, (1) as shown in the present embodiment, the width of the A electrode 22 is increased in accordance with the increase in the width of the unit light emitting region EU in the first direction D1, or (2) the eighth embodiment is used. (3) Whether the widths of the A electrodes 22 in each unit light emitting region EU are all the same with priority given to the ease of manufacturing as shown in the first embodiment. Can be appropriately selected according to which problem becomes a larger problem.

(Embodiment 10)
The present embodiment solves a new problem caused by adopting the PDP 1 of the first embodiment and the PDP 1 of the third to fifth, eighth, and ninth embodiments, which are improved versions of the first embodiment.

In the embodiment described above, all of the red, blue, and green phosphors 38R, 38B, and 38G cover the side surfaces of the partition walls 29 until they reach the portion close to the protective layer 18. According to this configuration, there arises a new problem that the viewing angle of the PDP 1 becomes narrow.
Specifically, the line of sight of a person observing the light emission of the red, blue, and green phosphors 38R, 38B, and 38G with the first substrate 11 in between is perpendicular to the display surface S in a plane perpendicular to the partition walls 29. As the opening angle θ (see FIG. 27 to be described later), which is an angle formed with the direction D3, increases, the red (R), blue (B), and green (G) phosphors 38R, 38B hidden behind the partition wall 29, Since the 38G portion becomes large, the emission intensity of each color attenuates. However, with respect to the blue phosphor 38B, the adjacent interval between the two partition walls 29 sandwiching the blue phosphor 38B is wider than in the case of other colors, so the attenuation of the emission intensity with the increase in the opening angle θ is red or green phosphor 38R. , Will be slower than 38G. Therefore, as the opening angle θ increases, the emission intensity balance of red, blue, and green is lost, resulting in a problem that the color changes to the blue direction and the viewing angle becomes narrower.

  Therefore, in the present embodiment, the following improvements are made.

  FIG. 27 is a longitudinal sectional view showing a state when the discharge cell structure of the PDP 1 according to the present embodiment is cut along a cross section perpendicular to the lead direction of the A electrode 22. 27, the same reference numerals as those in FIG. 1 denote the same elements. Reference numeral 62 denotes a glaze layer to be described later. Here, as shown in FIG. 27, (1) the distance between the two partitions 29 sandwiching the blue phosphor (first phosphor) 38B is set to the red phosphor (second phosphor) 38R or the green phosphor. (Second phosphor) Set larger than the adjacent interval between the two partition walls 29 sandwiching 38G, and (2) the blue unit light-emitting region (first unit light-emitting region) on the protective layer 18 within the side surface of the partition wall 29 The adjacent portion 61 is not covered with the blue phosphor 38B. On the other hand, with respect to the adjacent red and green unit light emitting regions (second unit light emitting regions), the red phosphor 38R and the green phosphor 38G have the side surfaces of the partition walls 29 from the bottom to the protective layer 18 as in the prior art. Covering is performed until the adjacent portion 61 is reached.

  As described above, in the present embodiment, since the above-described characteristic configurations (1) and (2) are adopted, the attenuation of the blue emission intensity with the increase of the opening angle θ is reduced to the red or green emission intensity. Therefore, it is possible to improve display characteristics when viewed from an oblique direction.

  In FIG. 27, the portion 61 adjacent to the protective layer 18 on the side surface of the partition wall 29 is not covered with the blue phosphor 38B. Instead, the blue emission intensity in the portion 61 is the same. A structure may be adopted in which the coating thickness of the portion 61 of the blue phosphor 38B is set to be small so as to be sufficiently weaker than other portions in the unit light emitting region. In the case of this modified example, inevitably, with respect to the coating thickness of the various phosphors 38 in the portion 61 adjacent to the protective layer 18 in the side surface of the partition wall 29, the blue phosphor 38B is a red or green phosphor. It is smaller than 38R and 38G.

  As described above, according to this embodiment, (1) the adjacent interval between the barrier ribs sandwiching the blue phosphor is made larger than the adjacent interval between the barrier ribs sandwiching the red phosphor or the green phosphor, and (2 ) Since the coating thickness of the blue phosphor in the part adjacent to the protective layer on the side wall of the partition wall is made relatively small, it is desirable to balance the emission intensity of red, blue and green when the display surface is viewed from the front. On the other hand, it is possible to improve the problem that the loss of the viewing angle related to the emission intensity balance of red, blue and green becomes large.

(Modification common to Embodiments 1 to 10)
(1) In the first to tenth embodiments, for example, as shown in FIGS. 1, 7, 23, and 25, the barrier ribs and the phosphors are formed on the inner surface of the second substrate. A dielectric layer (glaze layer) covering the inner surface and the A electrode formed on the inner surface is provided as a base layer (of course, the vicinity of the terminal portion of the A electrode is not covered by the base layer). You may make it form a partition and a fluorescent substance on the surface of a formation. As an example, FIG. 28 shows such a modification to the PDP 1 in FIG. In FIG. 28, reference numeral 62 corresponds to the dielectric layer, and the layer 62 functions as a layer for preventing migration of the material of the A electrode 22 and a reflection layer of light generated from the phosphor.

  Here, if the above modification is also taken into consideration, the “first substrate” can be broadly understood as follows. That is, in the case of the PDP 1 including the dielectric layer 62, the portion composed of the parts 21, 22, 62 corresponds to the “first substrate”, and the “surface of the first substrate” corresponds to the surface of the dielectric layer 62. . On the other hand, in the case of the PDP 1 that does not include the dielectric layer 62, the first substrate 21 having the A electrode 22 forms a “first substrate”.

  (2) The technical features described in the first to tenth embodiments are divided into a partition group that is spaced apart in the first direction, and another partition that is three-dimensionally intersected with each of the partition groups and spaced apart in the second direction. It is possible to apply to a PDP and a PDP device having a group on a second substrate.

  The technical features of Embodiments 1 to 10 are also applied to PDPs and PDP devices in which the top of the partition provided on the second substrate does not directly contact the surface of the protective layer of the first substrate. Of course, it is possible.

(Appendix)
While the embodiments of the present invention have been disclosed and described in detail above, the above description exemplifies aspects to which the present invention can be applied, and the present invention is not limited thereto. In other words, various modifications and variations to the described aspects can be considered without departing from the scope of the present invention.

FIG. 3 is a perspective view showing a cross-sectional structure of a main part of the plasma display panel in the first embodiment. 6 is an explanatory diagram illustrating a relationship between a pixel EG and a unit unit light emitting region EU as viewed from the display surface S in Embodiment 1. FIG. FIG. 3 is a schematic diagram for explaining the phosphor and its light distribution component in the first embodiment. 6 is a cross-sectional view of the partition wall in Embodiment 1 cut along a plane perpendicular to the second direction. FIG. 2 is a cross-sectional view of the main structure of the PDP in Embodiment 1. FIG. FIG. 6 is an explanatory diagram showing changes in color temperature values when the red and green luminances are fixed and the blue luminance is changed in the first embodiment. FIG. 10 is a perspective view showing a main part structure of a PDP in a second embodiment. 12 is an explanatory diagram for explaining the width of each unit light emitting region EU included in a pixel EG in Embodiment 2. FIG. 6 is a schematic diagram of the arrangement of phosphors in Embodiment 2. FIG. 6 is a schematic diagram of the arrangement of phosphors in Embodiment 2. FIG. 6 is a schematic diagram of the arrangement of phosphors in Embodiment 2. FIG. 6 is a schematic diagram of the arrangement of phosphors in Embodiment 2. FIG. 6 is a schematic diagram of the arrangement of phosphors in Embodiment 2. FIG. 6 is a schematic diagram of the arrangement of phosphors in Embodiment 2. FIG. FIG. 5 is a longitudinal sectional view schematically showing an example of a PDP device according to a third embodiment. FIG. 6 is a longitudinal sectional view schematically showing an example of a PDP device according to a fourth embodiment. It is a top view for pointing out the problem which arises when PDP of Embodiment 1 is employ | adopted. It is a top view which shows an example of the shape of the terminal part of A electrode of PDP which concerns on Embodiment 5. FIG. It is a block diagram which shows the structural example 1 of the solution 1 of Embodiment 6. FIG. It is a figure which shows the structural example of the solution 2 of Embodiment 6. FIG. It is a figure which shows the modification of the solution 2 of Embodiment 6. FIG. FIG. 10 is a perspective top view schematically showing an example of a pixel configuration of a PDP according to a seventh embodiment. FIG. 10 is a perspective view showing an example of a PDP according to an eighth embodiment. It is a longitudinal cross-sectional view which points out the problem which arises when the PDP of Embodiment 1 is employ | adopted. FIG. 20 is a perspective view showing an example of a PDP according to a ninth embodiment. It is a longitudinal cross-sectional view which shows typically the effect | action of PDP which concerns on Embodiment 9. FIG. FIG. 10 is a longitudinal sectional view showing an example of a configuration of a PDP according to a tenth embodiment. It is a perspective view which shows an example of the modification common to Embodiment 1-10. It is a block diagram which shows the conventional plasma display apparatus. It is a timing chart which shows the waveform of the drive signal within 1 subfield. It is a perspective view which shows the structure of the conventional PDP. It is a schematic diagram which shows the arrangement | sequence of each fluorescent substance seen from the display surface S side in the conventional PDP.

Explanation of symbols

38B Blue phosphor, 38R red phosphor, 38G green phosphor, EG pixel, EU unit emission region, δ (R) width of red phosphor, δ (G) width of green phosphor, δ ( B) Width of blue phosphor, δ (Ba) Width of blue phosphor, δ (Bb) Width of blue phosphor.

Claims (3)

A first substrate;
A plurality of display electrodes formed on an inner surface of the first substrate in a first direction;
Unit light emission having a plurality of address electrodes formed in a second direction intersecting with the first direction, and a plurality of pixels, together with the first substrate, corresponding to respective emission colors of red, blue and green A second substrate sandwiching the discharge space so as to be composed of regions,
Phosphors of each emission color provided corresponding to each of the plurality of address electrodes so that each of the emission colors can emit light,
Provided on the second substrate so as to extend in the second direction, at least a substantial separation interval corresponding to one of the emission colors is a separation corresponding to another emission color. A plurality of partition walls spaced apart in the first direction so as to be different from the interval;
A plasma display panel comprising:
Each of the plurality of address electrodes in the display light emitting cell is disposed so as to be located at the approximate center between the partition walls adjacent to the address electrode in the plurality of partition walls.
Each of the terminal portions of the plurality of address electrodes is formed on an end portion of the second substrate so as to be sequentially arranged at equal intervals.
Surface discharge type plasma display panel. The surface discharge type plasma display panel according to claim 1,
Each of the plurality of address electrodes is divided into a plurality of blocks according to the width of each FPC board to be connected.
Surface discharge type plasma display panel. The plasma display panel according to claim 1 or 2,
A display electrode driving circuit connected to each of the electrodes constituting each of the plurality of pairs of display electrodes of the surface discharge type plasma display panel for driving the surface discharge type plasma display panel;
An address electrode driving circuit connected to the plurality of address electrodes of the surface discharge type plasma display panel;
A drive control unit including a control unit for controlling each of the display electrode drive circuit and the address electrode drive circuit;
A surface discharge type plasma display device comprising:

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