JP2006196263A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the width of a non-display region formed at the peripheral part of a PDP. <P>SOLUTION: A sealing layer 18 in which the front face glass substrate 10 and the rear face glass substrate 13 are mutually pasted, and which seals a discharge space S, and a barrier rib 5 that sections the discharge space S for every discharge cell C are provided. The sealing layer 18 has a frame part 18A formed in a frame shape to surround the circumference of the display region E11 by being positioned in the non-display region E12 of the discharge space S, and a lateral wall part 18B positioned between discharge cells C sectioned by the barrier rib 15 in the display region E11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  In a plasma display panel (hereinafter referred to as PDP), discharge cells arranged in a matrix and color-coded in three primary colors are formed in a sealed discharge space between two substrates. By emitting light, an image corresponding to the image signal is formed on the display surface of the panel.

  The discharge space of the PDP is sealed by a sealing layer formed at the peripheral edge between the two substrates facing each other with a predetermined interval, and is further evacuated by this exhaust. It is configured by sealing discharge gas.

  The sealing layer formed between the two substrates has a function of bonding the two substrates together and a function of maintaining a sealed state in the discharge space.

  For this reason, in order to secure the bonding strength of the two substrates and the sealing strength of the discharge space, the fusion area between the sealing layer and each substrate is required to be larger than a predetermined value. When the area is small, the bonding strength between the two substrates is insufficient, and there is a risk of leakage in the sealing layer.

  FIG. 1 shows the structure of a PDP that has been proposed in order to ensure the bonding strength between such a sealing layer and the substrate and the sealing property of the discharge space.

  In the PDP 1 of FIG. 1, a frame-shaped first sealing layer 3 is formed in a non-display area E <b> 2 at the peripheral edge on the rear glass substrate 2, and further, a frame-like shape is formed inside the first sealing layer 3. The second sealing layer 4 is formed, and the discharge space inside the second sealing layer 4 is double sealed by the first sealing layer 3 and the second sealing layer 4.

  In FIG. 1, reference numeral 5 denotes a partition that divides the discharge space into discharge cells in the display region E1 (see Patent Document 1).

  The PDP 1 in FIG. 1 includes a sealing layer, a rear glass substrate 2 and a front glass substrate (not shown) formed by a double sealing layer formed by the first sealing layer 3 and the second sealing layer 4. The fusion area between them is increased, the bonding strength between the back glass substrate 2 and the front glass substrate is ensured, and the occurrence of leakage in the sealing layer is prevented.

  However, in this conventional PDP 1, in order to form a double sealing layer, it is necessary to set a large width for the non-display area where the sealing layer is located. On the other hand, there arises a problem that the ratio of the area of the non-display area increases.

  Furthermore, in recent years, as shown in FIG. 2, it has been proposed to configure a large-sized multi-display device by arranging PDPs vertically and horizontally. Such a multi-display device is configured as a PDP 1 having the above-described configuration. If the width of the non-display area E2 is increased due to the formation of the double sealing layer in each PDP1, the display areas E1 of the PDP1 arranged vertically and horizontally are arranged between the display areas E1. The joint portion J where the formed image is not displayed becomes large, and thereby the sense of unity of the image formed by the plurality of PDPs 1 constituting the multi-display device is impaired, and the viewer becomes very unsightly. The problem occurs.

JP 2000-30618 A

  An object of the present invention is to solve the problems in the conventional PDP as described above.

  In order to achieve the above object, a plasma display panel according to the present invention (the invention described in claim 1) is formed between a pair of substrates opposed to each other through a discharge space, and the substrates are attached to each other and discharged. A sealing layer that seals the space; and a partition wall that is formed between the pair of substrates and divides the discharge space into discharge cells. A display region is provided in a central portion of the discharge space, and the display region and the sealing region are sealed. In a plasma display panel in which a non-display area is provided in a portion surrounding the display area between the stop layer and the sealing layer, the sealing layer is positioned in the non-display area of the discharge space and surrounds the display area And a second sealing portion positioned between the discharge cells partitioned by the barrier ribs in the display region.

  In the present invention, the front glass substrate and the rear glass substrate are opposed to each other through the discharge space, and the peripheral portion between the front glass substrate and the rear glass substrate is sealed by the sealing layer, and the discharge space is substantially ladder-shaped. Each of the discharge cells is partitioned by a plurality of barrier ribs that are formed in a row and extend in the row direction and are provided in the column direction with a required gap therebetween, and the sealing layer is positioned in a non-display region of the discharge space. A frame portion (first sealing portion) formed in a frame shape surrounding the periphery of the display region, and a lateral wall portion (second sealing portion) positioned in the display region within a gap between substantially ladder-shaped partition walls The PDP configured by the above is the best embodiment.

  In the PDP according to this embodiment, a part of the sealing layer is formed not only in the non-display area part of the panel but also in the display area part, so that the frame part positioned in the non-display area part of the sealing layer Even when the width of the conventional PDP is narrower than the width of the sealing layer of the conventional PDP, a necessary fusion area is ensured between the sealing layer and the front glass substrate and the rear glass substrate. The width of the non-display area can be reduced while ensuring the bonding strength of the back glass substrate and the sealing strength of the discharge space, and the ratio of the non-display area portion to the display area portion of the PDP can be reduced.

  As a result, when a multi-display device is configured by the PDP, the width of the joint formed by the respective non-display areas between the PDPs is reduced, and one of the images displayed by the multi-display device is reduced. It becomes possible to keep the experience.

  Further, according to the PDP of this embodiment, the front glass substrate and the rear glass substrate are bonded together by the lateral wall portion of the sealing layer even in the display area of the panel, so that the bending or external pressure generated in the substrate can be reduced. It is possible to prevent the generation of abnormal noise due to the occurrence of a non-uniform gap between the substrate and the partition due to the swelling due to the decrease.

  FIG. 3 is a plan view schematically showing the configuration of the display area portion of the PDP in the first example of the embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line VV in FIG. 5 is a partial configuration diagram showing the configuration of the peripheral portion including the non-display area of the PDP in the same embodiment with the front glass substrate removed.

  First, the configuration of the display area portion of the PDP in this embodiment will be described with reference to FIGS.

  3 and 4, in the PDP, a plurality of row electrode pairs (X, Y) that respectively form display lines L are arranged on the back surface of the front glass substrate 10 as a display surface. 3 in the left-right direction).

  The row electrode X constituting the row electrode pair (X, Y) includes a transparent electrode Xa made of a transparent conductive film such as ITO formed in a T shape and a transparent electrode Xa extending in the row direction of the front glass substrate 10. The bus electrode Xb is made of a metal film connected to the base end.

  Similarly, the row electrode Y is a T-shaped transparent electrode Ya made of a transparent conductive film such as ITO, and a metal film that extends in the row direction of the front glass substrate 10 and is connected to the base end of the transparent electrode Ya. Bus electrode Yb.

  The row electrodes X and Y are alternately arranged in the column direction of the front glass substrate 10 (vertical direction in FIG. 3), and the transparent electrodes Xa and Ya arranged in parallel along the bus electrodes Xb and Yb are respectively The wide apexes of the transparent electrodes Xa and Ya are opposed to each other through a discharge gap g having a required width, extending to the paired row electrode side.

  A dielectric layer 11 is further formed on the back surface of the front glass substrate 10 so as to cover the row electrode pair (X, Y). The row electrode pairs adjacent to each other are formed on the back surface of the dielectric layer 11. Bus electrodes Xb and Yb positioned back to back (X, Y) and raised dielectrics projecting to the back side of the dielectric layer 11 at positions facing the region between the bus electrodes Xb and Yb positioned back to back The layer 11A is formed to extend in parallel with the bus electrodes Xb and Yb.

  A protective layer 12 made of MgO is formed on the back side of the dielectric layer 11 and the raised dielectric layer 11A.

  On the other hand, on the display side surface of the rear glass substrate 13 facing in parallel with the front glass substrate 10, the column electrodes D are respectively transparent electrodes in pairs of row electrode pairs (X, Y). They are arranged in parallel at predetermined intervals so as to extend in a direction (column direction) orthogonal to the row electrode pair (X, Y) at a position facing Xa and Ya.

  A column electrode protective layer (dielectric layer) 14 covering the column electrode D is further formed on the display side surface of the rear glass substrate 13, and a partition wall 15 is formed on the column electrode protective layer 14. Yes.

  Each partition wall 15 is formed in a substantially ladder shape for each portion facing each row electrode pair (X, Y), and extends in the row direction and has a gap SL between each other, as will be described later. Are arranged side by side in the row direction.

  That is, each partition wall 15 includes a pair of horizontal walls 15A extending parallel to the bus electrodes Xb and Yb at positions facing the bus electrodes Xb and Yb of the row electrodes X and Y constituting the row electrode pair (X, Y). A plurality of vertical walls 15B extending in the column direction between the pair of horizontal walls 15A at positions between the column electrodes D arranged in parallel to each other are formed in a substantially ladder shape.

  In addition, gaps SL are formed between the lateral walls 15A of the partition walls 15 that are adjacent to each other in the row direction and that face each other back to back.

  By the partition wall 15, the discharge space S formed between the front glass substrate 10 and the rear glass substrate 13 is for each part facing the transparent electrodes Xa and Ya that form a pair of each row electrode pair (X, Y). The rectangular discharge cells C are formed respectively.

  In each discharge cell C, a phosphor layer 16 is formed on the surface of the horizontal wall 15A and the vertical wall 15B facing the discharge cell C of the partition wall 15 and the column electrode protective layer 14 so as to cover these five surfaces. ing.

  The phosphor layer 16 is divided into three primary colors of red, green, and blue for each discharge cell C, and the red, green, and blue colors are arranged in order in the row direction.

  A discharge gas is enclosed in the discharge space S.

  Next, the configuration of the peripheral portion including the non-display region portion of the PDP will be described with reference to FIG.

  In FIG. 5, a plurality (one in the illustrated example) in which no phosphor layer is formed on each end of each partition 15 of the PDP (only the left end is shown in FIG. 5). The dummy cell C1A is formed, and the phosphor layer is not formed on the outermost end portion of the partition 15 outside the first dummy cell C1A, and the second side is released. A dummy cell C1B is formed.

  Furthermore, on the rear glass substrate 13, at positions above the partition 15 located at the top and below the partition 15 located at the bottom (only the bottom is shown in FIG. 5), respectively. The dummy partition walls 17 extending in the row direction are formed in parallel to the partition walls 15 with the gap SL therebetween, as in the case between the adjacent partition walls 15.

  The dummy partition wall 17 extends in a row direction (outside of the back glass substrate 13) opposite to the adjacent partition wall 15 from the one side wall 17A facing the side wall 15A of the partition wall 15 with the gap SL interposed therebetween. The plurality of vertical walls 17B are formed into a substantially comb-like shape.

  A portion where the discharge cells C on the rear glass substrate 13 are arranged in a matrix is set in the display area E11. The first dummy cell C1A and the second dummy cell C1B around the display area E11, the dummy barrier rib 17 The portion including is set in the non-display area E12.

  A sealing layer 18 that seals the discharge space S between the front glass substrate 10 and the rear glass substrate 13 is formed in a portion surrounding the display area E <b> 11 on the rear glass substrate 13.

  The sealing layer 18 includes a frame portion 18A formed in a frame shape along the peripheral edge of the rear glass substrate 13 in the non-display area E12, and the gaps SL between the partition walls 15 and between the partition walls 15 and the dummy partition walls 17. The interior is composed of a plurality of horizontal wall portions 18B extending in the row direction from the side frame portion of the frame portion 18A to a required position in the display area E11.

  The frame portion 18A of the sealing layer 18 is formed in the second dummy cell C1B of the partition wall 15 and the comb teeth of the dummy partition wall 17 so as to fill them.

  The height of the frame portion 18A and the side wall portion 18B of the sealing layer 18 is formed to be higher than the height of the partition wall 15 and the dummy partition wall 17, and the front glass substrate 10 is superimposed on the rear glass substrate 13. In this state, the frame portion 18A and the lateral wall portion 18B of the sealing layer 18 are in contact with the back side of the front glass substrate 10 and are fused to the back side of the front glass substrate 10, whereby the front glass substrate 10 and the back glass substrate 13 are bonded together, and the discharge space S between the front glass substrate 10 and the back glass substrate 13 is sealed.

  The horizontal wall portion 18B of the sealing layer 18 can be formed by applying frit paste to the back substrate by nozzle coating or printing, as in the conventional method of forming the sealing layer. The frit paste is applied only to the formation position of the frame portion 18A in an amount larger than that necessary for the formation of the frame portion 18A so that the layer height of the frit paste is higher than the height of the partition wall 15. For example, when the front glass substrate 10 is overlaid in this state, the frit paste applied to the formation position of the frame portion 18A is compressed by the front glass substrate 10 and enters the gap SL, thereby The sealing layer 18 in which the frame portion 18A and the lateral wall portion 18B are integrally formed is easily formed.

  According to the PDP having the above-described configuration, the horizontal wall portion 18B of the sealing layer 18 is formed from the non-display area E12 of the panel to the position extending into the display area E11, thereby reducing the width of the frame portion 18A of the conventional PDP. Even when the width is smaller than the width of the sealing layer, a necessary fusion area is ensured between the sealing layer 18 and each of the front glass substrate 10 and the rear glass substrate 13. The width of the non-display area E12 can be reduced while securing the bonding strength of the glass substrate 13 and the sealing strength of the discharge space S, so that the area ratio of the non-display area portion to the display area portion of the PDP can be reduced. become.

  As a result, when a multi-display device is constituted by the PDP, the width of joints (see FIG. 2) formed by the respective non-display areas E12 between the PDPs is reduced. It becomes possible to maintain a sense of unity of the displayed video.

  For example, when the width of the non-display area E12 of each PDP is preferably about 2 mm in order to maintain a sense of unity of images displayed by the multi-display device, the lateral wall portion 18B of the sealing layer 18 is 3 mm or more. In addition to the frame portion 18A having a width of 2 mm formed in the non-display area E12, a seal of 5 mm or more necessary for securing the bonding strength of the substrates and the sealing strength of the discharge space S is achieved. The width of the stop layer is secured.

  Furthermore, according to the PDP having the above-described configuration, the front glass substrate 10 and the partition wall 15 are not deformed due to the bending of the front glass substrate 10 or the rear glass substrate 13 or the swelling of the front glass substrate 10 due to the decrease in external air pressure. Generation of abnormal noise due to the formation of a uniform gap can be prevented.

  That is, in the above PDP, the front glass substrate 10 and the rear glass substrate 13 are bonded to each other by extending the horizontal wall portion 18B of the sealing layer 18 into the display area E11 of the PDP and bonding the front glass substrate 10 and the rear glass substrate 13 together. Since the rear glass substrate 13 is held in the display area E11 so as to maintain a predetermined interval, the substrate vibrates during driving of the PDP due to a non-uniform gap generated between the substrate and the partition wall as in the conventional PDP. Thus, occurrence of a state in which abnormal noise is generated by hitting the partition wall is prevented.

  Here, since the horizontal wall portion 18B of the sealing layer 18 is located between the partition walls 15 and the gap SL between the partition wall 15 and the dummy partition wall 17 which are non-display region portions in the display region E11, There is no risk of adversely affecting image formation.

  The lateral wall portion 18B of the sealing layer 18 is formed between the partition walls 15 and in the gap SL between the partition wall 15 and the dummy partition wall 17, so that the frit paste for forming the lateral wall portion 18B becomes a rear glass substrate. 13 is regulated by the lateral wall 15A of the partition wall 15 and the lateral wall 17A of the dummy partition wall 17 facing each other with the gap SL therebetween, so that it is formed at a predetermined position without protruding into the discharge cell C. .

  Further, the lateral wall portion 18B of the sealing layer 18 is on the same plane as the frame portion 18A on the rear glass substrate 13 (that is, the column electrode protective layer) between the partition walls 15 and within the gap SL between the partition walls 15 and the dummy partition walls 17. 14), it can be formed by the same film thickness control as that of the frame portion 18A.

  In the above PDP, in addition to the partition walls 15, dummy partition walls 17 are formed at the upper and lower parts of the panel (only the lower part of the panel is shown in FIG. 5). The first dummy cell C1A and the second dummy cell C1B are formed in the part, but this is not stable when the partition is formed on the substrate in the manufacturing process. In some cases, the cells defined by the barrier ribs not having the prescribed dimensions formed on the peripheral portion of the substrate cannot be used as discharge cells as they are, and therefore, outside the portion where the regular discharge cells C are formed. This is to ensure a margin so that all the discharge cells C have a prescribed dimension.

  In the above PDP, the frame portion 18A of the sealing layer 18 is also formed in the dummy partition wall 17, the first dummy cell C1A, and the second dummy cell C1B. The width of the display area E12 can be further reduced.

  FIG. 6 shows a modification of the PDP.

  The PDP dummy partition wall 17 shown in FIG. 5 is formed in a substantially comb-like shape by the horizontal wall 17A and the vertical wall 17B, whereas the PDP in FIG. A dummy partition wall 27 located in the lower part (FIG. 6 shows only the dummy partition wall 27 formed in the lower part of the partition wall 15) is formed in a strip shape by only the lateral wall.

  The sealing layer 28 includes a frame portion 28A formed in a frame shape along the peripheral edge of the rear glass substrate 13 in the non-display area E12, and the gaps between the partition walls 15 and between the partition walls 15 and the dummy partition walls 27. The SL includes a plurality of horizontal wall portions 28B extending in the row direction from the side frame portion of the frame portion 28A to a required position in the display area E11. The frame portion 28A of the sealing layer 28 includes the partition wall 15A. The second dummy cell C <b> 1 </ b> B is filled up to a position where it contacts the dummy partition wall 27 from the outside.

  The configuration of the other parts is the same as that of the PDP in FIG. 5, and the same reference numerals as those in FIG.

  As in the case of the PDP in the example of FIG. 5, the PDP in the example of FIG. 6 also secures a necessary fusion area between the sealing layer 28, the rear glass substrate 13 and the front glass substrate (not shown), The width of the non-display area E12 can be reduced.

  5 and 6 show only a part of the lower left corner or lower right corner of the panel, but the configuration of other parts of the panel is the same.

  FIG. 7 is a front view showing a second example of the PDP according to the present invention with the front glass substrate removed.

  In this example, the lateral wall portions 18B and 28B of the sealing layers 18 and 28 of the PDP in the first embodiment described above are formed integrally with the frame portions 18A and 28A and extend from the side into the gap SL. The sealing layer 38 is formed by separating the frame portion 38A positioned in the non-display area E12 and the lateral wall portion 38B positioned in the gap SL between the partition walls 15, and the lateral wall portion 18B is formed in each gap SL. It is formed so that it may be located in the center position.

  Similarly to the PDP in the first embodiment, the PDP in this example is also required between the sealing layer 38 and the rear glass substrate 13 and the front glass substrate (not shown) by the lateral wall portion 38B formed in the display region E11. The width of the frame portion 38A of the sealing layer 38 positioned in the non-display area E12 can be reduced while ensuring a sufficient fusion area, and accordingly, the width of the non-display area E12 is made smaller than the conventional one. Can also be reduced.

  In the PDP of this example, the lateral wall portion 38B of the sealing layer 38 is positioned at the central portion of the PDP as compared with the lateral wall portions 18B and 28B of the sealing layer 18 and 28 of the PDP of the first embodiment. Due to the fact that the bonding strength of the front glass substrate and the rear glass substrate 13 at the center of the PDP is strengthened, and accordingly, a non-uniform gap is formed between the front glass substrate side and the partition wall 15. The function of preventing abnormal noise generation during PDP driving is further enhanced.

  FIG. 8 is a front view showing a third example of the PDP according to the present invention with the front glass substrate removed.

  In this example, the lateral wall portions 18B and 28B of the sealing layers 18 and 28 of the PDP in the first embodiment described above are formed integrally with the frame portions 18A and 28A and extend from the side into the gap SL. The sealing layer 48 is formed by separating a frame portion 48A located in the non-display region E12 and a lateral wall portion 48B located in the gap SL between the partition walls 15, and each lateral wall portion 48B Each is formed separately in two left and right portions at the center position in the gap SL.

  Similarly to the PDP in the first embodiment, the PDP in this example is also necessary between the sealing layer 48 and the rear glass substrate 13 and the front glass substrate (not shown) by the lateral wall portion 48B formed in the display region E11. The width of the frame portion 48A of the sealing layer 48 positioned in the non-display area E12 can be reduced while ensuring a sufficient fusion area, and accordingly the width of the non-display area E12 is made smaller than that of the conventional one. Can also be reduced.

  In the PDP of this example, the lateral wall portions 48B separated into the left and right sides of the sealing layer 48 are compared with the lateral wall portions 18B and 28B of the sealing layers 18 and 28 of the PDP of the first embodiment. Since it is located in the central part, the bonding strength of the front glass substrate and the rear glass substrate 13 in the central part of the PDP is strengthened, and in addition to this, there is a non-uniformity between the front glass substrate side and the partition 15. The function of preventing the generation of abnormal noise during PDP driving due to the formation of the gap is further strengthened.

  FIG. 9 is a front view showing a fourth example of the PDP according to the present invention with the front glass substrate removed.

  Whereas the lateral wall portions 18B and 28B formed integrally with the frame portions 18A and 28A of the sealing layers 18 and 28 of the PDP in the first embodiment described above extend into the gap SL from both sides of the gap SL. In the sealing layer 58 of this example, the lateral wall portion 58B is connected to one side frame portion (right side frame portion in the illustrated example) of the frame portion 58A located in the non-display area E12. The horizontal wall portion 58B is formed in the gap SL between the partition walls 15 from one end side (the right end side in the illustrated example) past the center position of the panel and the other end portion. It is formed to extend to a position close to the side (the left end side in the illustrated example).

  Similarly to the PDP in the first embodiment, the PDP in this example is also necessary between the sealing layer 58 and the rear glass substrate 13 and the front glass substrate (not shown) by the lateral wall portion 58B formed in the display region E11. The width of the frame portion 58A of the sealing layer 58 located in the non-display area E12 can be reduced while ensuring a sufficient fusion area, and accordingly, the width of the non-display area E12 is made smaller than the conventional one. Can also be reduced.

  In the PDP of this example, the lateral wall portion 58B of the sealing layer 58 is positioned in the central portion of the PDP compared to the lateral wall portions 18B and 28B of the sealing layers 18 and 28 of the PDP of the first embodiment. Due to the fact that the bonding strength of the front glass substrate and the rear glass substrate 13 at the center of the PDP is strengthened, and accordingly, a non-uniform gap is formed between the front glass substrate side and the partition wall 15. The function of preventing abnormal noise generation during PDP driving is further enhanced.

  In the PDPs of the first to fourth embodiments described above, the lateral wall portion constituting the sealing layer together with the frame portion located in the non-display area of the panel is located in the gap formed between the partition walls. On the other hand, this embodiment can be applied to, for example, a PDP in which the partition walls are formed in a lattice shape and no gap is formed between the display lines of the partition walls.

  That is, in the case of a lattice-shaped partition wall, the horizontal wall portion that forms the sealing layer together with the frame portion positioned in the non-display region and is positioned in the display region is formed on the horizontal wall, and the stripe-shaped partition wall In this case, it is formed on the region where the phosphor between adjacent discharge cells in the column direction is formed and on the stripe-shaped barrier rib.

  The PDP in this example also secures the necessary fusion area between the sealing layer and the front glass substrate and the rear glass substrate by the lateral wall portion formed in the display area, as in the PDP in each of the above-described embodiments. The width of the frame portion of the sealing layer positioned in the non-display area can be reduced, and accordingly, the width of the non-display area can be made smaller than that of the conventional one.

It is sectional drawing which shows the structure of the conventional PDP. It is a front view which shows the conventional multi-display apparatus. It is a front view which shows the 1st Example in embodiment of this invention. It is sectional drawing in the VV line | wire of FIG. In the Example, it is a fragmentary sectional view which shows the corner part of PDP in the state which removed the front glass substrate. It is a fragmentary sectional view which shows the modification of PDP in the Example. It is a front view which shows the 2nd Example in embodiment of this invention. It is a front view which shows the 3rd Example in embodiment of this invention. It is a front view which shows the 4th Example in embodiment of this invention.

Explanation of symbols

10 ... Front glass substrate (substrate)
13 ... Back glass substrate (substrate)
15 ... partition 15A ... horizontal wall 15B ... vertical wall 17, 27 ... dummy partition (second partition)
17A ... Horizontal wall 17B ... Vertical wall 18, 28, 38, 48, 58 ... Sealing layer 18A, 28A, 38A, 48A, 58A ... Frame portion (first sealing portion)
18B, 28B, 38B, 48B, 58B ... Lateral wall part (second sealing part)
C ... discharge cell C1A ... first dummy cell C1B ... second dummy cell (cell)
E11 ... display area E12 ... non-display area SL ... gap

Claims (16)

A sealing layer that is formed between a pair of substrates opposed to each other via a discharge space and affixes the substrates to each other and seals the discharge space, and a discharge space that is formed between the pair of substrates and includes the discharge cells. In the plasma display panel, the display area is provided in the central portion of the discharge space and the non-display area is provided in the portion surrounding the display area between the display area and the sealing layer.
The sealing layer is located in a non-display area of the discharge space and is formed between a first sealing portion formed in a frame shape surrounding the display area and a discharge cell partitioned by a partition in the display area. A plasma display panel comprising a second sealing portion positioned.   The plasma display panel according to claim 1, wherein the second sealing portion of the sealing layer is formed integrally with the first sealing portion.   The plasma display panel according to claim 1, wherein the second sealing portion of the sealing layer is formed separately from the first sealing portion.   The clearance gap is formed in the wall part which divides between the discharge cells which adjoin the said partition, The 2nd sealing part of the sealing layer is located in the clearance gap formed in the wall part of this partition. The plasma display panel as described.   The partition wall includes a pair of horizontal walls extending in the row direction with a predetermined interval therebetween and a plurality of vertical walls extending in the column direction between the pair of horizontal walls and arranged in parallel in the row direction with a predetermined interval therebetween. The gap is formed in a substantially ladder shape, the gap is formed in a direction extending in the row direction between the substantially ladder-shaped partitions arranged in parallel in the column direction, and the second sealing portion of the sealing layer has a substantially ladder shape. The plasma display panel according to claim 4, which is located in a gap between the partition walls.   The second sealing portion of the sealing layer is formed integrally with the first sealing portion, and on the end side of the gap between the substantially ladder-shaped partition walls, the display region in the gap from the first sealing portion. The plasma display panel according to claim 5, which extends to a required position.   The plasma display panel according to claim 6, wherein the second sealing portion of the sealing layer extends from the first sealing portion into the gap at both ends of the gap between the substantially ladder-shaped partition walls.   The second sealing portion of the sealing layer extends from the first sealing portion to a position past the central portion of the display area in the gap on one end side of the gap between the substantially ladder-shaped partition walls. Item 7. The plasma display panel according to Item 6.   The second sealing portion of the sealing layer is formed separately from the first sealing portion, and is positioned at a central portion of a display region in a gap between substantially ladder-shaped partitions. Plasma display panel.   The plasma display panel according to claim 9, wherein the second sealing portion of the sealing layer is separated into a plurality of portions.   The plasma display panel according to claim 5, wherein a length of the second sealing portion is 3 mm or more.   The region of the discharge space defined by the outer end portion of the partition wall constitutes a cell that does not emit light, and the inside of the cell that does not emit light is filled with the first sealing portion of the sealing layer. 2. A plasma display panel according to 1.   2. The plasma display panel according to claim 1, wherein a second partition is formed at a position facing the outer edge of the partition, and the first sealing portion of the sealing layer is in contact with the outer wall of the second partition.   14. The plasma display panel according to claim 13, wherein the second partition wall is formed in a substantially comb-like shape, and the inside of the substantially comb-shaped second partition wall is filled with the first sealing portion of the sealing layer.   The second partition wall is positioned in parallel with a required gap at an outer position of the partition wall located at the outermost position among the substantially ladder-shaped partition walls arranged in parallel in the row direction with a gap therebetween, and a sealing layer The plasma display panel according to claim 13, wherein the second sealing portion is located in a gap between the partition walls and is also located in a gap between the partition walls and the second partition wall.   The plasma display panel according to claim 1, wherein a plurality of devices are arranged vertically and horizontally to constitute a multi-display device.

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