JP2006351259A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To generate stable initialized discharge even if xenon partial pressure of a discharge gas of a panel equipped with auxiliary discharge cells is increased. <P>SOLUTION: This plasma display panel is provided with: a plurality of display electrode couples arranged on a front substrate so as to be parallel with one another and each comprising a scanning electrode and a sustaining electrode; a plurality of data electrodes arranged on a back substrate disposed oppositely to the front substrate by interposing a discharge space so as to intersect with the display electrode couples and to be parallel with one another; a plurality of main discharge cells 40 for generating main discharge in the respective intersection parts between the display electrode couples and the data electrodes; and barrier ribs for partitioning discharge spaces in a plurality of priming discharge cells for generating auxiliary discharge between the main discharge cells 40 and the main discharge cells 40. The barrier ribs include longitudinal wall parts 34a in parallel with the data electrodes and lateral wall parts 34b in parallel with the display electrode couples; when the main discharge cell 40 is viewed from the front substrate side, spaces are formed between the lateral wall part 34b partitioning the main discharge cell 40, and the scanning electrode and the sustaining electrode. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plasma display panel used for a wall-mounted television or a large monitor.

  A plasma display panel (hereinafter abbreviated as “panel”) is a display device with excellent visibility characterized by a large screen, a thin shape, and a light weight.

  In general, a panel is configured by forming a large number of discharge cells between a front plate and a back plate arranged to face each other. The front plate is formed with a plurality of pairs of display electrodes consisting of scan electrodes and sustain electrodes on the front glass substrate, and the back plate is formed with a plurality of parallel data electrodes on the rear glass substrate. The front plate and the back plate face each other and are sealed so that the three-dimensionally intersect. A discharge cell is formed at a portion where the display electrode pair and the data electrode cross three-dimensionally. In the panel having such a configuration, ultraviolet light is generated by gas discharge in each discharge cell, and phosphors of RGB colors are excited and emitted by this ultraviolet light to perform color display.

  As a method for driving the panel, a so-called subfield method is generally used in which one field period is divided into a plurality of subfields, and gradation display is performed by a combination of subfields that emit light. Here, each subfield has an initialization period, an address period, and a sustain period.

  In the initializing period, initializing discharge is simultaneously performed in all the discharge cells, the history of wall charges for the individual individual discharge cells is erased, and wall charges necessary for the subsequent address operation are formed. In addition, it has a function of generating priming (priming for discharge = excited particles) for stably generating address discharge.

  In the address period, a scan pulse is sequentially applied to the scan electrode, an address pulse corresponding to an image signal to be displayed is applied to the data electrode, and an address discharge is selectively performed between the scan electrode and the data electrode. Selective wall charge formation is performed.

  In the subsequent sustain period, a predetermined number of sustain pulses are applied between the scan electrodes and the sustain electrodes, and the discharge cells in which the wall charges are formed by the address discharge are selectively sustain-discharged to emit light. This sustain discharge (and address discharge) is a main discharge for displaying an image.

  Thus, in order to display an image correctly, it is important to reliably perform selective address discharge in the address period. However, due to restrictions on the circuit configuration, a high voltage cannot be used for the address pulse, There are many factors that increase the discharge delay with respect to the address discharge, such as making it difficult for the phosphor layer formed on the electrode to discharge. Therefore, priming for generating the address discharge stably is very important.

The present inventors have proposed a novel panel capable of stably generating an address discharge by using priming generated by the auxiliary discharge by providing auxiliary discharge cells in the panel (for example, Patent Document 1). reference).
JP 2004-296212 A

  In recent years, in order to meet demands for reducing power consumption and improving brightness, panel structures and panel materials have been actively studied. For example, it is generally known that the luminous efficiency of the panel is improved by increasing the xenon partial pressure of the discharge gas sealed in the panel. However, when the xenon partial pressure is simply increased in the above-described panel, the initialization discharge becomes unstable, and there are problems such as generation of discharge cells that are erroneously discharged.

  The present invention has been made in view of these problems, and can generate a stable initializing discharge even when the xenon partial pressure of a discharge gas of a panel having auxiliary discharge cells is increased, and has high luminous efficiency and An object of the present invention is to provide a panel capable of displaying a high-quality image with stable discharge.

  The panel of the present invention includes a plurality of display electrode pairs made up of scan electrodes and sustain electrodes arranged on a first substrate so as to be parallel to each other, and a second electrode arranged opposite to the first substrate across a discharge space. A plurality of data electrodes arranged on the substrate so as to intersect with the display electrode pair and parallel to each other, a plurality of main discharge cells for generating a main discharge at each of the intersections of the display electrode pair and the data electrode, and A plurality of auxiliary discharge cells for generating an auxiliary discharge between the main discharge cells and a partition wall for partitioning a discharge space, the partition wall being a vertical wall portion parallel to the data electrode and a horizontal wall parallel to the display electrode pair When the main discharge cell is viewed from the first substrate side, a space is provided between the horizontal wall portion that divides the main discharge cell and the display electrode pair. With this configuration, stable initialization discharge can be generated even if the xenon partial pressure of the discharge gas of the panel having auxiliary discharge cells is increased, and high-quality image display is achieved with high luminous efficiency and stable discharge. Possible panels can be provided.

  Further, in the panel of the present invention, it is desirable that the interval provided between the horizontal wall portion defining the main discharge cell and the display electrode pair is 30 μm or more when the main discharge cell is viewed from the first substrate side.

  Further, the scan electrode and the sustain electrode of the panel of the present invention each have a transparent electrode and a metal bus, and when the main discharge cell is viewed from the first substrate side, the metal bus may be provided outside the region of the main discharge cell. Good. With this configuration, a panel with high luminance can be realized without the visible light generated in the phosphor layer being blocked by the metal bus.

  According to the present invention, stable initialization discharge can be generated even when the xenon partial pressure of the discharge gas of the panel having auxiliary discharge cells is increased, and the image has high luminous efficiency and high quality with stable discharge. A panel capable of display can be provided.

  Hereinafter, a panel according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is an exploded perspective view showing the structure of the panel according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view of the panel. A glass front substrate 21 which is a first substrate and a rear substrate 31 which is a second substrate are arranged opposite to each other with a discharge space interposed therebetween, and a mixed gas of neon and xenon which emits ultraviolet rays by discharge in the discharge space. Is enclosed.

  On the front substrate 21, a plurality of display electrode pairs composed of the scan electrodes 22 and the sustain electrodes 23 are formed in parallel to each other. At this time, the scan electrodes 22 and the sustain electrodes 23 are alternately arranged two by two so that the scan electrodes 22 -the sustain electrodes 23 -the sustain electrodes 23 -the scan electrodes 22-. Scan electrode 22 and sustain electrode 23 are each composed of transparent electrodes 22a and 23a and metal bus bars 22b and 23b formed on transparent electrodes 22a and 23a, respectively. A light absorption layer 28 made of a black material is provided between scan electrode 22 and scan electrode 22 and between sustain electrode 23 and sustain electrode 23. Further, an auxiliary scanning electrode 26 is formed on the light absorption layer 28 between the scanning electrode 22 and the scanning electrode 22. A dielectric layer 24 and a protective layer 25 are formed so as to cover the scan electrode 22, the sustain electrode 23, the auxiliary scan electrode 26 and the light absorption layer 28.

  On the back substrate 31, a plurality of data electrodes 32 are formed in parallel to each other in a direction crossing the scan electrodes 22 and the sustain electrodes 23, and a dielectric layer 33 a is formed so as to cover the data electrodes 32. A plurality of priming electrodes 36 are formed on the dielectric layer 33 a in parallel with the scanning electrodes 22. The dielectric layer 33 a insulates between the data electrode 32 and the priming electrode 36. A dielectric layer 33b is formed so as to cover the priming electrode 36, and a partition wall 34 for partitioning a main discharge cell 40 for generating a main discharge is formed thereon.

  The partition wall 34 has a vertical wall portion 34 a that extends in a direction parallel to the data electrode 32, and a horizontal wall portion 34 b that forms the main discharge cell 40 and forms a gap portion 41 between the main discharge cells 40. As a result, the barrier ribs 34 form a main discharge cell row in which a plurality of main discharge cells 40 are connected along a display electrode pair including a pair of scan electrodes 22 and sustain electrodes 23, and a gap is formed between adjacent main discharge cell rows. Part 41 is produced. A priming electrode 36 is formed in the gap 41 where the two scanning electrodes 22 are adjacent to each other in the gap 41, and this gap 41 serves as a priming discharge cell 41a which is an auxiliary discharge cell. In other words, every other gap portion 41 is a priming discharge cell 41 a having the priming electrodes 36 every other gap portion 41. The gap 41b is a gap located on the side where the two sustain electrodes 23 are adjacent to each other.

  A phosphor layer 35 is provided on the surface of the dielectric layer 33 b corresponding to the main discharge cells 40 partitioned by the barrier ribs 34 and on the side surfaces of the barrier ribs 34. Further, an electron emission layer 39 using magnesium oxide (MgO) powder is provided on the surface of the dielectric layer 33 b corresponding to the priming discharge cell 41 a and the side surface of the partition wall 34. The material of the electron emission layer 39 may be a material having a large secondary electron emission coefficient, and may be other metal oxides.

In the discharge space between the front substrate 21 and the rear substrate 31, a discharge gas in which one kind or two or more kinds of rare gases among xenon, helium, neon, and argon are mixed with a predetermined pressure (for example, 6.7 × 10 ⁴ Pa). In this embodiment, a mixed gas of neon and xenon is used, and the xenon partial pressure is 20%. As described above, a panel having a large number of main discharge cells at the intersection between the display electrode pair and the data electrode is formed.

  3A and 3B are diagrams for illustrating the positional relationship between the partition walls 34 and the display electrode pairs of the panel according to Embodiment 1 of the present invention. FIG. 3A is an enlarged view of the panel cross section, and FIG. It is the top view which looked at the panel from the front substrate 21 side. In FIG. 3, components other than the display electrode pair and the partition are omitted in order to make the main points easy to see. In the present embodiment, the lateral wall portion 34b is designed to have a cross-sectional shape with a width of about 40 μm and a height of about 120 μm, and the width of the main discharge cell 40 formed between the two lateral wall portions 34b is 455 μm. It is designed to be. Scan electrode 22 and sustain electrode 23 are both designed to have a width of 147.5 μm and a discharge gap formed between scan electrode 22 and sustain electrode 23 has a width of 80 μm. These dimensions are selected so that there is a gap between the display electrode pair and the lateral wall portion 34b when the main discharge cell 40 is viewed from the front substrate 21 side. In the present embodiment, as shown in FIG. 3, the distance between scan electrode 22 and horizontal wall portion 34b and the distance between sustain electrode 23 and horizontal wall portion 34b are both designed to be 40 μm. Hereinafter, these intervals are abbreviated as “partition-electrode intervals”.

FIG. 4 is an electrode array diagram of the panel in accordance with the first exemplary embodiment of the present invention. M columns of data electrodes D _{1 to} D _m (data electrodes 32 in FIG. 1) are arranged in the column direction, and n rows of scan electrodes SC _{1 to} SC _n (scan electrodes 22 in FIG. 1) and n rows of data electrodes are arranged in the row direction. sustain electrodes _SU 1 to SU _n (sustain electrodes 23 in FIG. 1) and the scanning electrodes SC ₁ - sustain electrode SU ₁ - sustain electrode SU ₂ - scan electrode _SC 2 - · · · and so as to alternately arranged two by two Has been. Between the adjacent scan electrodes, n / 2 auxiliary scan electrodes HS ₁ , HS ₃ ,... (Auxiliary scan electrode 26 in FIG. 1) and n / 2 priming electrodes PR ₁ , PR ₃ , (Priming electrodes 36 in FIG. 1) are arranged. The auxiliary scan electrode HS _p (p is an odd number) and the scan electrode SC _p are electrically connected.

Here, the auxiliary scan electrode HS _p and the priming electrode PR _p serve as auxiliary discharge electrodes for generating priming.

A main discharge cell C _{i, j} (main discharge in FIG. 1) including a pair of scan electrodes SC _i , sustain electrodes SU _i (i = 1 to n) and one data electrode D _j (j = 1 to _m ). M × n cells 40) are formed in the discharge space. In addition, priming discharge cells PS _i (priming discharge cells 41a in FIG. 1) including auxiliary scanning electrodes HS _p and priming electrodes PR _p are formed in odd-numbered rows among 1 to n rows.

  Next, driving waveforms and timings for driving the panel will be described.

  FIG. 5 is a drive waveform diagram of the panel in accordance with the first exemplary embodiment of the present invention. In the embodiment of the present invention, one field period is composed of a plurality of subfields having an initializing period, an address period, and a sustaining period, and the initializing period of the first subfield is all the main discharges related to image display. An all-cell initializing operation for generating an initializing discharge in the cell is performed, and an initializing discharge is selectively generated in the main discharge cells in which the sustaining discharge has been performed in the sustain period of the subfield immediately before the second subfield. A description will be given assuming that the selective initialization operation is performed. The all-cell initialization period is divided into two parts and called the first half and the second half.

In the first half of the initializing period of the first subfield, the data electrode D _j and the sustain electrode SU _i are held at 0 (V), respectively, and the scan electrode SC _i receives the voltage V _i1 , the sustain electrode SU _i and the data electrode D A ramp waveform voltage that gradually rises toward voltage V _i2 exceeding the discharge start voltage is applied to _j . Further, the priming electrode PR _p applying a ramp waveform voltage that gently decreases from a voltage Vy to the voltage Vz. Then, in the main discharge cell C _{i, j} and the priming discharge cell PS _i , the scan electrode SC _i and the sustain electrode SU _i , the scan electrode SC _i and the data electrode D _j , the auxiliary scan electrode HS _p and the priming electrode PR _p A weak initializing discharge occurs between the two. At this time, before a discharge occurs in the main discharge cell C _{i, j} , first, a weak priming discharge occurs between the auxiliary scan electrode HS _p and the priming electrode PR _p in the priming discharge cell PS _i . The priming discharge at this time is a stable discharge with a small discharge delay. Then, priming is supplied into the main discharge cells C _{i, j} . Subsequently, a weak initializing discharge occurs between the scan electrode SC _i and the sustain electrode SU _i and the data electrode D _j in the main discharge cell C _{i, j} . Since the discharge at this time occurs after the priming is supplied to the main discharge cells C _{i, j,} the discharge is very stable.

Negative wall voltage is accumulated on scan electrode SC _i and auxiliary scan electrode HS _p, and positive wall voltage is accumulated on data electrode D _j , sustain electrode SU _i, and priming electrode PR _p. The Here, the wall voltage at the upper part of the electrode represents a voltage generated by wall charges accumulated on a dielectric layer covering the electrode, a protective layer, a phosphor layer, a partition wall, or the like.

  Although the xenon partial pressure of the discharge gas of the panel in this embodiment is 20% and is set higher than that of the conventional panel, the distance between the scan electrode 22 and the horizontal wall portion 34b and the sustain electrode 23 and the horizontal wall are set. Since the design is such that the distance from the portion 34b, that is, the partition wall-electrode distance is 40 μm, stable initialization discharge is possible. Note that the partition wall-electrode interval was experimentally determined, and details will be described later.

In the latter half of the initialization period, sustain electrode SU _i is maintained at positive voltage Ve and voltage of priming electrode PR _p is maintained at 0 (V), and scan electrode SC _i is connected to sustain electrode SU _i and data electrode D _j . A ramp waveform voltage that gently falls from a voltage V _{i3 that} is equal to or lower than the discharge start voltage to a voltage V _i4 that exceeds the discharge start voltage is applied. During this time, a weak initializing discharge occurs between the scan electrode SC _i and the sustain electrode SU _i , the scan electrode SC _i and the data electrode D _j , and the auxiliary scan electrode HS _p and the priming electrode PR _p . Then, the negative wall voltage on the scan electrode SC _{i and} the positive wall voltage on the sustain electrode SU _i are weakened, and the positive wall voltage on the data electrode D _j is adjusted to a value suitable for the write operation. The positive wall voltage above PR _{p is} also adjusted to a value suitable for the priming operation. Thus, the all-cell initialization operation for initializing all the discharge cells involved in image display is completed.

In the address period, to hold the scan electrodes SC _i temporarily voltage Vc. Then, a voltage Vq substantially equal to the voltage (Vc−V _i4 ) is applied to the priming electrode PR _p .

Next, scan pulse voltage Va is applied to the first row to the scan electrodes SC _1. Then, the voltage difference between the priming electrodes PR ₁ top with the top of the auxiliary scanning electrodes HS ₁ becomes shall priming electrodes PR ₁ upper wall voltage is added to the voltage (Vq-Va), exceeding the discharge start voltage Priming discharge occurs. Then, priming is diffused inside the main discharge cells C1 _{, j} in the first row and the main discharge cells C2 _{, j in the} second row. Discharge at this time stable priming discharge can be obtained at a high speed discharge delay is small because priming discharge cell PS ₁ is discharged easily structure as described above. The negative wall voltage on priming electrodes PR ₁ top by the discharge are accumulated.

At the same time, a positive write pulse voltage Vd is applied to the data electrode D _k (k represents an integer of 1 to _m ) corresponding to the image signal to be displayed in the first row among the data electrodes D _j . Then, during the discharge occurs at the intersection of the data electrode D _k of applying a write pulse voltage Vd and scan electrodes SC _1, and the sustain electrodes SU ₁ corresponding main discharge cells C _{1, k} and the scan electrodes SC ₁ Progresses to discharge. The main discharge cell C _1, a positive voltage to the scan electrodes SC ₁ top of _k is accumulated, a negative voltage is accumulated on sustain electrode SU ₁ top, the first line of the write operation is completed.

Here, the first line of the write operation writes with generating the priming discharge with the scan of the scan electrodes SC _1. The address discharge of the main discharge cells C _{1 and k} is generated while the priming is supplied from the priming discharge generated between the auxiliary scanning electrode HS ₁ and the priming electrode PR ₁ , so that the discharge delay is small and stable. .

Next, scan pulse voltage Va is applied to the second line scan electrode SC _2. At the same time, applying a positive write pulse voltage Vd to data electrode D _k corresponding to the image signal to be displayed on the second line of the data electrode D _j. Then, discharge occurs at the intersection of the data electrode D _k and scan electrode SC _2, develop into a discharge between the corresponding sustain electrode SU ₂ main discharge cell C _{2, k} and scan electrode SC _2. The main discharge cell C _2, a positive voltage to the scan electrodes SC ₂ top of _k is accumulated, a negative voltage is accumulated on sustain electrode SU ₂ upper, second line of the write operation is completed.

Here, the second line of the main discharge cells C _{2, k} of the write operation occurs in a state where sufficient priming is already supplied from the generated priming discharge between the auxiliary scanning electrodes HS ₁ and the priming electrode PR ₁ . Therefore, the discharge delay of the address discharge is small and the discharge is stable.

Thereafter, the same address operation is performed until the main discharge cell C _{n, j} in the _n- th row, and the address operation is completed.

In the sustain period, scan electrode SC _i , priming electrodes PR _{1 to} PR _n−1 and sustain electrode SU _i are temporarily returned to 0 (V). Then, applying a positive sustain pulse voltage Vs to the scan electrodes SC _i. At this time, the voltage between the upper portion of scan electrode SC _{i and} upper portion of sustain electrode SU _i in main discharge cell C _{i, k where} address discharge has occurred is in addition to sustain pulse voltage Vs, and the upper portion of scan electrode SC _i in the address period. Since the wall voltage accumulated on the sustain electrode SU _i is added, the discharge start voltage is exceeded and a sustain discharge occurs. Thereafter, similarly, by applying sustain pulses alternately to scan electrode SC _i and sustain electrode SU _i , sustain discharge continues for the number of sustain pulses for main discharge cells C _{i, k} that have undergone address discharge. Done.

In the subsequent sub-field initialization period, sustain electrode SU _i is maintained at positive voltage Ve, and a ramp waveform voltage that gradually decreases toward voltage Vi ₄ is applied to scan electrode SC _i . Then, a weak initializing discharge occurs between the scan electrode SC _i and the sustain electrode SU _i and the data electrode D _k of the main discharge cells C _{i, k} that have undergone the sustain discharge. Then, the wall voltage above scan electrode SC _i and sustain electrode SU _i is weakened, and the positive wall voltage above data electrode D _k is adjusted to a value suitable for the write operation, and the positive wall above priming electrode PR _p is adjusted. The voltage is also adjusted to a value suitable for the priming operation.

  The subsequent write period, sustain period, and subsequent subfield drive waveforms and panel operation are the same as described above.

Next, the relationship between the barrier rib-electrode interval and the stability of the initialization discharge will be described. In the panel with the priming discharge cell, not only the address discharge but also the initialization discharge is stably generated. However, in the panel having the conventional structure, when the xenon partial pressure is increased, an abnormal strong discharge is generated in the initialization period. There was a tendency to occur easily. The inventors of the present invention noted that this abnormal strong discharge occurs when the ramp waveform voltage that gradually rises in the first half of the initialization period approaches the voltage _Vi2 . Since the discharge when approaching the voltage V _i2 is considered to have spread to the vicinity of the lateral wall portion 34b, the relationship between the partition-electrode spacing that is considered to affect the discharge at this time and the abnormal strong discharge is described in detail. Examined.

  FIG. 6 is a diagram showing experimental results obtained by measuring the degree of occurrence of abnormal strong discharge with respect to the partition wall-electrode spacing using a panel having a discharge gas xenon partial pressure of 20%. Here, the horizontal axis represents the partition wall-electrode interval, and the vertical axis represents the degree of occurrence of an abnormal strong discharge (relative value). Thus, there is a clear correlation between the barrier rib-electrode interval and the abnormal discharge, and it has been clarified that the initialization discharge is stably generated when the barrier rib-electrode interval is set large. In the panel of the present embodiment, as shown in FIG. 6, in order to generate a stable initializing discharge without causing an abnormal discharge, it is necessary to set the partition wall-electrode interval to at least 30 μm or more. all right.

  In addition, since the spread of the sustain discharge is restricted and the light emission luminance is lowered when the partition-electrode interval is increased, it is not desirable to increase the partition-electrode interval more than necessary. Therefore, it is desirable to examine the relationship between the partition-electrode spacing and abnormal discharge for each setting of the discharge cell, and to optimally set the partition-electrode spacing based on the result.

(Embodiment 2)
FIG. 7 is a diagram for illustrating the positional relationship between the partition walls of the panel and the display electrode pairs in the second embodiment of the present invention. FIG. 7 (a) is an enlarged view of the panel cross section, and FIGS. (C) is the top view which looked at the panel from the front substrate side. In FIG. 7, components other than the display electrode pair and the partition are omitted in order to make the main points easier to see. On the front substrate 21, a plurality of display electrode pairs composed of the scan electrodes 22 and the sustain electrodes 23 are formed in parallel to each other. At this time, the scan electrodes 22 and the sustain electrodes 23 are alternately arranged two by two so that the scan electrodes 22 -the sustain electrodes 23 -the sustain electrodes 23 -the scan electrodes 22-. A light absorption layer 28 made of a black material is provided between scan electrode 22 and scan electrode 22 and between sustain electrode 23 and sustain electrode 23. A dielectric layer 24 and a protective layer 25 are formed so as to cover the scan electrode 22, the sustain electrode 23, and the light absorption layer 28.

The steps so far are the same as those of the panel in the first embodiment. However, the scan electrode 22 and the sustain electrode 23 of the panel according to the second embodiment are configured by transparent electrodes 22a and 23a, respectively, and metal bus bars 22b and 23b are formed at positions not overlapping the transparent electrodes 22a and 23a. The transparent electrodes 22a and 23a and the metal bus bars 22b and 23b are electrically connected by connection lines 22c and 23c. As shown in FIG. 7, the metal bus bars 22b and 23b of the panel in the second embodiment are provided outside the region of the main discharge cell 40 when the main discharge cell 40 is viewed from the front substrate 21 side. The visible light generated in the layer 35 is not blocked by the metal buses 22b and 23b, and a panel with high luminance can be realized. The metal bus bars 22b corresponding to the odd-numbered scan electrode SC _p is projected to the priming discharge cell inside the light absorption layer 28, the projecting portion serves as an auxiliary scan electrodes 26.

  The connection lines 22c and 23c may be provided in a region inside the main discharge cell 40 as shown in FIG. 7B, or provided at a position overlapping the vertical wall portion 34a as shown in FIG. 7C. May be. When provided in the region inside the main discharge cell 40, a region where the horizontal wall portion 34b and the connection lines 22c and 23c overlap is generated inside the main discharge cell 40, so that the stability of the initialization discharge tends to be slightly deteriorated. . However, since the panel assembly accuracy is reduced as compared with the case where it is provided at a position overlapping the vertical wall portion 34a, it is advantageous in manufacturing. In this case, it is desirable to form the connection lines 22c and 23c using a transparent electrode material such as ITO so that visible light generated in the phosphor layer 35 is not blocked by the connection lines 22c and 23c.

  The back substrate 31, the data electrode 32, the priming electrode 36, the partition wall 34, the phosphor layer 35, the discharge gas, and the like are the same as those in the first embodiment, and thus the description thereof is omitted.

  In the first and second embodiments, a panel having a priming discharge cell having an auxiliary scanning electrode on the front substrate side and a priming electrode on the rear substrate side has been described as an example. Is not limited to this. For example, the present invention is also applied to a panel having a structure for generating a priming discharge between adjacent scanning electrodes in a priming discharge cell and a structure for generating a priming discharge between a priming electrode and a data electrode provided on the front substrate side. Can do.

  Since the panel of the present invention can generate a stable initializing discharge even when the xenon partial pressure of the discharge gas of the panel having auxiliary discharge cells is increased, the light emission efficiency is high and the quality is high with a stable discharge. It is useful as a panel capable of image display.

The disassembled perspective view which shows the structure of the panel in Embodiment 1 of this invention. Cross section of the panel The figure for showing the positional relationship between the partition of the panel and the display electrode pair Electrode arrangement of the panel Drive waveform diagram of the panel The figure which shows the experimental result which measured the generation | occurrence | production degree of the abnormal strong discharge with respect to a partition-electrode space | interval The figure for showing the positional relationship of the partition of a panel and display electrode pair in Embodiment 2 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Front substrate 22 Scan electrode 22a, 23a Transparent electrode 22b, 23b Metal bus line 22c, 23c Connection line 23 Sustain electrode 24 Dielectric layer 25 Protection layer 26 Auxiliary scan electrode 28 Light absorption layer 31 Back substrate 32 Data electrode 33a, 33b Dielectric Layer 34 Partition 34a Vertical wall portion 34b Horizontal wall portion 35 Phosphor layer 36 Priming electrode 39 Electron emission layer 40 Main discharge cell 41a Priming discharge cell

Claims (3)

A plurality of display electrode pairs consisting of scan electrodes and sustain electrodes arranged parallel to each other on the first substrate;
A plurality of data electrodes arranged to cross the display electrode pair and to be parallel to each other on a second substrate disposed opposite to the first substrate across a discharge space;
A plurality of main discharge cells for generating a main discharge at each intersection of the display electrode pair and the data electrode, and a plurality of auxiliary discharge cells for generating an auxiliary discharge between the main discharge cell and the main discharge cell. A partition that partitions the discharge space;
The partition wall has a vertical wall portion parallel to the data electrode and a horizontal wall portion parallel to the display electrode pair,
A plasma display panel characterized in that when the main discharge cell is viewed from the first substrate side, a space is provided between a horizontal wall section that defines the main discharge cell and the display electrode pair. 2. The space provided between the horizontal wall portion defining the main discharge cell and the display electrode pair when the main discharge cell is viewed from the first substrate side is 30 μm or more. 2. A plasma display panel according to 1. Each of the scan electrode and the sustain electrode has a transparent electrode and a metal bus, and when the main discharge cell is viewed from the first substrate side, the metal bus is provided outside the region of the main discharge cell. The plasma display panel according to claim 1 or 2, wherein:

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