JP2004071283A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plasma display panel having a favorable display quality, high productivity, and high reliability by suppressing a vertical crosstalk caused by interference between discharge cells and enlarging exhaust conductance. <P>SOLUTION: This plasma display panel is provided with a pair of front-side and rear-side substrates oppositely disposed to each other so as to form a discharge space between the substrates and a partition formed partitioning the discharge space in the rear-side substrate. The partition 21 is formed into a grid shape so as to separate the discharge cells from one another, an exhaust passage 22 is formed between the discharge cells in the longitudinal direction of an address electrode 10, and a slit 23 is formed in a part facing to he exhaust passage 22 of the partition 21. This arrangement can suppress the generation of the crosstalk and secure the exhaust conductance. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a plasma display panel known as a display device.
[0002]
[Prior art]
In recent years, expectations for large-screen, wall-mounted televisions as interactive information terminals have been increasing. There are many display devices for this purpose, such as a liquid crystal display panel, a field emission display, and an electroluminescence display, some of which are commercially available and some of which are under development. Among these display devices, a plasma display panel (hereinafter, referred to as a PDP) is a self-luminous type, which can display a beautiful image and is easy to enlarge a screen. Attention has been paid to thin display devices, and higher definition and larger screens are being promoted.
[0003]
This PDP is roughly classified into two types: an AC type and a DC type in terms of driving, and there are two types of discharge types, a surface discharge type and a counter discharge type. At present, PDPs of the AC type and the surface discharge type have become the mainstream.
[0004]
FIG. 8 shows an example of a panel structure of the PDP. As shown in FIG. 8, the PDP includes a front panel 1 and a back panel 2.
[0005]
The front panel 1 includes a plurality of stripe-shaped display electrodes 6 paired with a scanning electrode 4 and a sustain electrode 5 on a transparent front-side substrate 3 such as a glass substrate made of sodium borosilicon-based glass or the like by a float method. The dielectric layer 7 is formed so as to cover the display electrode 6 group, and a protective film 8 made of MgO is formed on the dielectric layer 7. The scanning electrode 4 and the sustaining electrode 5 are respectively composed of transparent electrodes 4a, 5a and bus electrodes 4b, 5b made of Cr / Cu / Cr or Ag electrically connected to the transparent electrodes 4a, 5a. ing. Although not shown, a plurality of black stripes are formed between the display electrodes 6 as light shielding films in parallel with the display electrodes 6.
[0006]
The rear panel 2 has an address electrode 10 formed in a direction orthogonal to the display electrode 6 on a rear substrate 9 disposed opposite to the front substrate 3 so as to cover the address electrode 10. A dielectric layer 11 is formed, and a plurality of stripe-shaped partitions 12 are formed on the dielectric layer 11 between the address electrodes 10 in parallel with the address electrodes 10. It is constituted by forming a phosphor layer 13 on the surface. Note that, for color display, the phosphor layer 13 is usually arranged in three colors of red, green, and blue in order.
[0007]
The front panel 1 and the rear panel 2 are arranged such that the substrates 3 and 9 are opposed to each other with a minute discharge space therebetween so that the display electrodes 6 and the address electrodes 10 are orthogonal to each other. The discharge space is filled with a discharge gas obtained by mixing neon and xenon at a pressure of about 66500 Pa (500 Torr) to form a panel.
[0008]
The discharge space of the panel is divided into a plurality of partitions by partition walls 12, and display electrodes 6 are provided so that a plurality of discharge cells serving as light emitting pixel regions are formed between the partition walls 12. 6 and the address electrodes 10 are arranged orthogonally.
[0009]
That is, as shown in FIG. 9, the display electrode 6 is formed by arranging the scan electrode 4 and the sustain electrode 5 with the discharge gap 14 interposed therebetween, and the area surrounded by the display electrode 6 and the partition 12 is a light emitting pixel. The area 15 becomes a non-light emitting area 16 between the display electrodes 6 of adjacent discharge cells.
[0010]
In this PDP, an image is displayed by generating a discharge by a periodic voltage applied to an address electrode and a display electrode, and irradiating ultraviolet rays by the discharge to a phosphor layer to convert it into visible light.
[0011]
Next, a driving method for displaying image data on a PDP will be described. Generally, when a display drive is performed by a PDP, one field period is divided into a plurality of subfields having a weight of a light emission period based on a binary system, and gradation display is performed by a combination of subfields that emit light. Each subfield has an initialization period, an address period, and a sustain period. In order to display image data, different signal waveforms are applied to each electrode during the initialization period, the address period, and the sustain period. ing.
[0012]
For example, during the initialization period, a pulse voltage having a positive polarity with respect to the sustain electrodes 5 and the address electrodes 10 is applied to all the scan electrodes 4 to accumulate wall charges on the protective film 8 and the phosphor layer 13. . In the address period, scanning is performed by sequentially applying a negative pulse to all the scan electrodes 4. When there is display data, if a positive data pulse is applied to the address electrode 10 while the scan electrode 4 is being scanned, a discharge occurs between the scan electrode 4 and the address electrode 10, and Wall charges are formed on the surface of the protective film 8. In the subsequent sustain period, a discharge plasma is generated between the scan electrode 4 and the sustain electrode 5 by applying a voltage sufficient to maintain a discharge between the scan electrode 4 and the sustain electrode 5 for a certain period. A predetermined image is displayed by exciting and emitting the phosphor layer 13 for a certain period. Note that, in the discharge space where no data pulse is applied during the address period, no discharge occurs and no excitation light emission of the phosphor layer 13 occurs.
[0013]
[Problems to be solved by the invention]
In the PDP as described above, since there is nothing to interrupt the discharge in the vertical direction, when the interval between the discharge cells is reduced, the upper and lower discharge cells interfere with each other to generate crosstalk, which significantly reduces the image quality. There has been a problem that it is lowered.
[0014]
Thus, as disclosed in Japanese Patent Application Laid-Open No. 2001-319579, a structure has been proposed in which a horizontal wall portion extending in the row direction is formed between upper and lower discharge cells to form a partition having a two-layer structure to suppress the occurrence of crosstalk. However, even when such a partition structure is used, crosstalk in the vertical direction does not completely disappear due to a gap above the horizontal wall portion.
[0015]
On the other hand, in Japanese Patent Application Laid-Open No. 2001-135240, the vertical wall portion and the horizontal wall portion are set at the same height to suppress the occurrence of vertical discharge interference. However, when the structure of the back plate is used, unless the structure of the front plate is made three-dimensional, the discharge cells are completely partitioned, so that the exhaust conductance increases. It became difficult and became a major problem from the viewpoint of productivity and reliability.
[0016]
The present invention has been made in view of such a problem, and suppresses vertical crosstalk caused by interference between discharge cells, and further increases the conductance of exhaust gas, so that display quality is improved and productivity is improved.・ To provide a highly reliable PDP.
[0017]
[Means for Solving the Problems]
In order to achieve this object, according to the present invention, the partition walls are formed in a lattice shape so as to separate the discharge cells from each other, and the exhaust electrodes are formed such that an exhaust passage is provided between the discharge cells in the longitudinal direction of the address electrodes. Further, a slit is formed in a portion of the partition wall facing the exhaust passage.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
That is, the invention according to claim 1 of the present invention divides the discharge space into a pair of front and rear substrates that are opposed to each other so that a discharge space is formed between the substrates, and the rear substrate. And a plurality of display electrodes arranged on the front substrate so that discharge cells are formed between the partition walls, and substantially perpendicular to the display electrodes and the discharge cell portions. A plurality of address electrodes arranged and arranged on the rear substrate, and a phosphor layer formed between the partitions and emitting light by discharge between the electrodes, wherein the partitions separate the discharge cells from each other. In such a manner as to form a lattice, an exhaust passage is formed between discharge cells in the longitudinal direction of the address electrode, and a slit is formed in a portion of the partition wall facing the exhaust passage. .
[0019]
According to a second aspect of the present invention, in the first aspect, the exhaust passage is provided between every other discharge cell in the longitudinal direction of the address electrode. According to a second aspect of the present invention, the slit formed in the partition wall is formed so that discharge cells adjacent to each other via the exhaust passage communicate with the same exhaust passage.
[0020]
According to a fourth aspect of the present invention, in the first aspect, the slit formed in the partition wall is formed such that adjacent discharge cells communicate with different exhaust passages via the exhaust passage.
[0021]
According to a fifth aspect of the present invention, in the first aspect, the slit formed in the partition wall is formed such that discharge cells adjacent in the arrangement direction of the address electrodes communicate with different exhaust passages. .
[0022]
According to a sixth aspect of the present invention, in the first aspect, a wall having a height lower than that of the partition wall is formed between the discharge cells in the exhaust passage.
[0023]
According to a seventh aspect of the present invention, in the first aspect, the partition has a wavy shape in the arrangement direction of the address electrodes, and the wavy partitions are arranged in the same pattern in the longitudinal direction of the address electrode. Features.
[0024]
Hereinafter, a PDP according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7, the same parts as those shown in FIG. 8 are denoted by the same reference numerals.
[0025]
(Embodiment 1)
FIG. 1 is a plan view showing a discharge cell structure of a PDP according to a first embodiment of the present invention, and FIG. 2 is an enlarged view showing a structure of a partition wall.
[0026]
The PDP according to the present invention also includes a front panel 1 and a back panel 2 as shown in FIG. 8, and the front panel 1 is a transparent front-side substrate such as a glass substrate made of a sodium borosilicate glass or the like by a float method. A plurality of pairs of stripe-shaped display electrodes 6, which are pairs of scan electrodes 4 and sustain electrodes 5, are formed on 3, and a dielectric layer 7 is formed so as to cover the display electrodes 6. It is configured by forming a protective film 8 made of MgO on the dielectric layer 7.
[0027]
On the other hand, the rear panel 2 has an address electrode 10 formed in a direction orthogonal to the display electrode 6 on a rear substrate 9 arranged to face the front substrate 3 so as to cover the address electrode 10. 1 and 2, a plurality of barrier ribs 21 are formed on the dielectric layer 11 between the address electrodes 10, and the side surfaces between the barrier ribs 21 and the dielectric layer 11 are formed. Is formed by forming a phosphor layer 13 on the surface of the substrate. Note that, for color display, the phosphor layer 13 is usually arranged in three colors of red, green, and blue in order.
[0028]
The front panel 1 and the rear panel 2 are arranged such that the substrates 3 and 9 are opposed to each other with a minute discharge space therebetween so that the display electrodes 6 and the address electrodes 10 are orthogonal to each other. The discharge space is filled with a discharge gas obtained by mixing neon and xenon at a pressure of about 66500 Pa (500 Torr) to form a panel.
[0029]
The discharge space of this panel is partitioned into a plurality of partitions by partition walls 21, and display electrodes 6 are provided so that a plurality of discharge cells serving as light emitting pixel regions are formed between partition walls 21. 6 and the address electrodes 10 are arranged orthogonally.
[0030]
Here, in the present invention, the partition wall 21 includes a vertical wall portion 21a extending in the vertical direction and a horizontal wall portion 21b extending in the horizontal direction and having the same height as the vertical wall portion 21a so as to separate the discharge cells from each other. And formed at intervals so that exhaust passages 22 are provided between the discharge cells in the longitudinal direction of the address electrodes 10, and furthermore, the horizontal wall portions of the partition walls 21 facing the exhaust passages 22. A slit 23 that connects the discharge cell space surrounded by the vertical wall portion 21a and the horizontal wall portion 21b and the exhaust passage 22 is formed in 21b. The slits 23 are formed alternately so that discharge cells adjacent in the arrangement direction of the address electrodes 10 communicate with different exhaust passages 22.
[0031]
That is, in the present invention, as shown in FIGS. 1 and 2, a horizontal wall portion 21b having the same height as the vertical wall portion 21a exists between the vertically adjacent discharge cells. Interference between adjacent discharge cells can be eliminated, and occurrence of crosstalk can be suppressed. Further, since a slit 23 connected to the exhaust passage 22 is formed for each discharge cell, the conductance of the exhaust can be increased, thereby shortening the exhaust time, and improving the productivity and improving the reliability. Can be secured.
[0032]
(Embodiment 2)
FIG. 3 is a plan view showing a discharge cell structure of a PDP according to a second embodiment of the present invention. In the present embodiment, the exhaust passages 22 are provided alternately between the discharge cells in the longitudinal direction of the address electrode 10 and formed such that the distance between the rows of the partition walls 21 is different every other row. The slit 23 is formed such that discharge cells adjacent to each other via the exhaust passage 22 communicate with the same exhaust passage 22.
[0033]
That is, in the front panel of the PDP, there are a type in which the scanning electrodes 4 and the sustaining electrodes 5 are alternately arranged one by one in the vertical direction, and a type in which the scanning electrodes 4 and the sustaining electrodes 5 are alternately arranged two by two. In a panel in which two scan electrodes 4 and two sustain electrodes 5 are alternately arranged, a cell in which the scan electrodes 4 are arranged above and the sustain electrodes 5 are arranged below is defined as an AB cell. If the cell arranged above and the scan electrode 4 arranged below is defined as a BA cell, the degree of crosstalk between the AB cell and the BA cell and the degree of crosstalk between the BA cell and the AB cell are different. As described above, when front panels having different degrees of crosstalk are used alternately between adjacent cells, it is necessary to combine rear panels corresponding to the front panels. This is effective when a front panel in which two electrodes and the sustain electrodes 5 are alternately arranged in the vertical direction is used.
[0034]
(Embodiment 3)
FIG. 4 is a plan view showing a discharge cell structure of a PDP according to a third embodiment of the present invention. In the present embodiment, a wall 24 having a height lower than that of the partition wall 21 is formed between the discharge cells in the exhaust passage 22. With this structure, when the phosphor layer 13 is formed in a space surrounded by the vertical wall portion 21a and the horizontal wall portion 21b of the partition wall 21, the fluorescent material flows out through the slit 23 provided in the partition wall 21, and the address electrode is formed. It is possible to prevent the flow into the partition walls 21 forming the adjacent discharge cells in the arrangement direction of 10, and to prevent the mixture of the phosphors between the adjacent discharge cells. Since the height of the wall 24 is set lower than the height of the partition 21, a gas passage at the time of exhaustion can be sufficiently secured.
[0035]
(Embodiment 4)
FIG. 5 is a plan view showing a discharge cell structure of a PDP according to a fourth embodiment of the present invention. In the present embodiment, the slits 23 formed in the partition 21 are formed in the same pattern so that the discharge cells adjacent to each other via the exhaust passage 22 communicate with different exhaust passages 22. According to this structure, An effective partition wall structure is obtained when a panel configuration or driving is used in which crosstalk from an oblique direction poses a problem.
[0036]
(Embodiment 5)
FIG. 6 is a plan view showing a discharge cell structure of a PDP according to a fifth embodiment of the present invention. In the present embodiment, the partition walls 25 having a wavy line shape in the arrangement direction of the address electrodes 10 are arranged in the same pattern in the longitudinal direction of the address electrodes 10, whereby the curved portions 25a of the partition walls 25 are alternately arranged. That is, each of the RGB discharge cells is formed in a space surrounded by the curved portion 25 a, and the exhaust passage 22 is formed between the partition walls 25.
[0037]
The ends of the partition walls and the corners of the partition walls shrink during the baking step performed in the partition wall forming step, and are likely to be partially deformed such as bulging or dents. With the structure according to the present embodiment, it is possible to reduce inconveniences such as swelling and depression due to deformation in the firing step.
[0038]
(Embodiment 6)
FIG. 7 is an enlarged view showing partition walls constituting a discharge cell of a PDP according to a sixth embodiment of the present invention. In the present embodiment, in the configuration of the partition 21 according to the first embodiment, the depth of the slit 23 formed in the partition 21 is set to a depth that does not reach the dielectric layer 11 at the bottom of the partition 21. According to this structure, when the phosphor layer 13 is formed in a space surrounded by the vertical wall portion 21a and the horizontal wall portion 21b of the partition wall 21, the phosphor material flows out through the slit 23 provided in the partition wall 21, and the address is increased. It is possible to prevent flow into the partition walls 21 that form adjacent discharge cells in the direction in which the electrodes 10 are arranged, and to prevent phosphors from being mixed between adjacent discharge cells. In addition, when such a partition structure is used, the phosphor layer 13 can be formed for each discharge cell by using a technique such as screen printing without attaching the phosphor to the region of the exhaust passage. It is.
[0039]
【The invention's effect】
As described above, according to the present invention, the partition walls are formed in a lattice shape so as to separate the discharge cells from each other, and the exhaust walls are formed between the discharge cells in the longitudinal direction of the address electrodes. A slit is formed at the part facing the exhaust passage, and it is possible to secure the exhaust conductance while suppressing crosstalk, thereby providing a PDP with good display quality and high productivity and reliability. can do.
[Brief description of the drawings]
FIG. 1 is a plan view showing a discharge cell structure of a plasma display panel according to a first embodiment of the present invention. FIG. 2 is an enlarged view showing a structure of a partition wall of the panel. FIG. 3 is a plasma according to a second embodiment of the present invention. FIG. 4 is a plan view showing a discharge cell structure of a display panel. FIG. 4 is a plan view showing a discharge cell structure of a plasma display panel according to a third embodiment of the present invention. FIG. 5 is a discharge view of a plasma display panel according to a fourth embodiment of the present invention. FIG. 6 is a plan view showing a cell structure. FIG. 6 is a plan view showing a discharge cell structure of a plasma display panel according to a fifth embodiment of the present invention. FIG. 7 shows a structure of a partition wall of the plasma display panel according to the sixth embodiment of the present invention. FIG. 8 is a perspective view showing a general plasma display panel. FIG. 9 is a view showing a configuration of a discharge cell portion of the plasma display panel. Plan view DESCRIPTION OF SYMBOLS
DESCRIPTION OF SYMBOLS 1 Front panel 2 Back panel 3, 9 Substrate 4 Scan electrode 5 Sustain electrode 6 Display electrode 10 Address electrode 13 Phosphor layer 21, 25 Partition wall 22 Exhaust passage 23 Slit 24 Wall

Claims (7)

A pair of front and rear substrates disposed so as to face each other so that a discharge space is formed between the substrates, a partition formed to partition the discharge space on the rear substrate, and a discharge cell between the partitions. A plurality of display electrodes formed on the front substrate so as to be formed, and a plurality of addresses formed on the rear substrate so as to be substantially orthogonal to the display electrodes and the discharge cell portion. An electrode, and a phosphor layer formed between the partition walls and emitting light by discharge between the electrodes, wherein the partition walls separate the discharge cells from each other and exhaust gas between the discharge cells in the longitudinal direction of the address electrodes. A plasma display panel, which is formed in a lattice shape so that a passage is provided, and a slit is formed in a portion of the partition wall facing the exhaust passage. 2. The plasma display panel according to claim 1, wherein the exhaust passage is provided every other discharge cell in the longitudinal direction of the address electrode. The plasma display panel according to claim 2, wherein the slit formed in the partition wall is formed such that adjacent discharge cells communicate with the same exhaust passage via the exhaust passage. The plasma display panel according to claim 1, wherein the slit formed in the partition wall is formed such that adjacent discharge cells communicate with different exhaust passages through the exhaust passage. The plasma display panel according to claim 1, wherein the slit formed in the partition wall is formed such that discharge cells adjacent in the arrangement direction of the address electrodes communicate with different exhaust passages. The plasma display panel according to claim 1, wherein a wall having a height lower than that of the partition wall is formed between the discharge cells in the exhaust passage. 2. The plasma display panel according to claim 1, wherein the partition walls have a wavy shape in the arrangement direction of the address electrodes, and the wavy partition walls are arranged in the same pattern in the longitudinal direction of the address electrodes.

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