JP4951260B2 - Plasma display panel device - Google Patents

Description

  The present invention relates to a plasma display panel (hereinafter also referred to as plasma panel or PDP), and in particular, includes a plasma panel structure capable of improving bright room contrast and realizing high efficiency, a driving method thereof, and a driving device. The present invention relates to a plasma display device.

  In recent years, a plasma display device is expected as a large and thin color display device. In particular, an alternating current (AC) in-plane discharge type PDP that generates display discharge between electrodes provided on the same substrate and is driven by alternating current is the most practical because of its simple structure and high reliability. It is an advanced method. Hereinafter, embodiments of a conventional AC in-plane discharge type PDP will be described.

  FIG. 2 is an example of an exploded perspective view showing a part of the structure of a general AC surface discharge type PDP. The PDP shown in the figure is obtained by laminating a front substrate 21 and a rear substrate 28 made of a glass substrate and integrating the phosphor layers 32 of red (R), green (G), and blue (B). This is a reflective PDP formed on the back substrate 28 side. The front substrate 21 has a pair of sustain discharge electrodes (also referred to as display electrodes) formed in parallel with a certain distance on the surface facing the back substrate 28. The pair of sustain discharge electrodes includes a transparent common electrode (hereinafter simply referred to as X electrode) (22-1, 22-2...) And a transparent independent electrode (hereinafter simply referred to as Y electrode or scanning electrode). It is composed of (23-1, 23-2 ...). The X electrodes (22-1, 22-2...) Include opaque X bus electrodes (24-1, 24-2...) For supplementing the conductivity of transparent electrodes, and Y electrodes (23- 1, 23-2... Are provided with Y bus electrodes (25-1, 25-2...) Extending in the direction of the arrow D2 (row direction) in FIG. Also, X electrode (22-1, 22-2 ...), Y electrode (23-1, 23-2 ...), X bus electrode (24-1, 24-2 ...) and Y bus electrode (25 -1, 25-2 ...) are insulated from the discharge for AC drive. That is, these electrodes are covered with a dielectric layer 26, which is generally made of a low-melting glass layer, and the dielectric layer 26 is covered with a protective film 27.

  The rear substrate 28 is three-dimensionally perpendicular to the X electrodes (22-1, 22-2...) And Y electrodes (23-1, 23-2...) Of the front substrate 21 on the surface facing the front substrate 21. A crossing address electrode (hereinafter, simply referred to as an A electrode) 29 is provided, and the A electrode 29 is covered with a dielectric layer 30. The A electrode 29 is provided extending in the direction of arrow D1 (column direction) in FIG. On the dielectric 30, partition walls (ribs) 31 that partition the A electrodes 29 are provided in order to prevent the spread of the discharge (to define the discharge region). The phosphor layers 32 that emit red, green, and blue light are sequentially applied in stripes so as to cover the groove surfaces between the partition walls 31.

  FIG. 3 is a main part sectional view showing a PDP sectional structure viewed from the direction of arrow D2 in FIG. 2, and shows one discharge cell which is the minimum unit of a pixel. In the figure, the boundary of the discharge cell is a position indicated by a broken line. Reference numeral 33 denotes a discharge space, which is filled with a discharge gas for generating plasma. When a voltage is applied between the electrodes, plasma 10 is generated by ionization of the discharge gas. FIG. 3 schematically shows how the plasma 10 is generated. The ultraviolet rays from the plasma excite the phosphor 32 to emit light, and the light emitted from the phosphor 32 passes through the front substrate 21 and constitutes a display screen by the light emitted from each discharge cell.

  FIG. 4 schematically shows the movement of charged particles (particles having positive or negative charges) in the plasma 10 in FIG. In FIG. 4, 3 is a particle having a negative charge (for example, an electron), 4 is a particle having a positive charge (for example, a positive ion), 5 is a positive wall charge, and 6 is a negative wall charge. This represents the state of charge at a certain point during the PDP drive, and the charge arrangement has no special meaning.

  FIG. 4 shows, as an example, a schematic diagram in which a discharge is generated and terminated by applying a negative voltage to the Y electrode 23-1, and applying a (relatively) positive voltage to the A electrode 29 and the X electrode 22-1. Represents. As a result, formation of wall charges that assists in starting discharge between the Y electrode 23-1 and the X electrode 22-1 (this is referred to as writing) is performed. In this state, when an appropriate reverse charge is applied between the Y electrode 23-1 and the X electrode 22-1, discharge occurs in the discharge space between the two electrodes via the dielectric layer 26 (and the protective film 27). . When the applied voltages of the Y electrode 23-1 and the X electrode 22-1 are reversed after the discharge is completed, a new discharge is generated. By repeating this, a discharge can be continuously formed. This is called a sustain discharge.

  FIG. 5 is a diagram showing an operation during a 1TV field period required to display one image on the PDP shown in FIG. FIG. 5A is a time chart. As shown in (I), the 1TV field period 40 is divided into a plurality of subfields 41 to 48 having different numbers of light emission times. The gradation is expressed by selecting light emission and non-light emission for each subfield. Each subfield includes a reset period 49, an address discharge period 50 defining a light emitting cell, and a sustain discharge period 51, as shown in (II).

FIG. 5B shows voltage waveforms applied to the A electrode, the X electrode, and the Y electrode in the write discharge period 50 of FIG. A waveform 52 is a voltage waveform applied to one A electrode in the write discharge period 50, a waveform 53 is a voltage waveform applied to the X electrode, and 54 and 55 are voltages applied to the i-th and (i + 1) -th electrodes of the Y electrode. The waveforms are V0, V1, and V2 (V). FIG. 5B shows the width of the voltage pulse applied to the A electrode as τ _a . As shown in FIG. 5B, when the scan pulse 56 is applied to the i-th row of the Y electrode, the write discharge occurs in the cell located at the intersection with the A-electrode 29. Further, when the scan pulse 56 is applied to the i-th row of the Y electrode, if the A electrode 29 is at the ground potential (GND), no write discharge occurs. Thus, in the write discharge period 50, a scan pulse is applied to the Y electrode once, and the A electrode 29 is set to V0 in the light emitting cell and to the ground potential in the non-light emitting cell corresponding to the scan pulse. In the discharge cell in which the writing discharge has occurred, the electric charge generated by the discharge is formed on the surface of the dielectric layer covering the Y electrode and the protective film. With the help of the electric field generated by this electric charge, it is possible to control on / off of the sustain discharge described later. That is, the discharge cell that has caused the write discharge becomes a light emitting cell, and the others become non-light emitting cells.

  FIG. 5C shows voltage pulses applied simultaneously between the X electrode and the Y electrode, which are the sustain discharge electrodes, during the sustain discharge period 51 of FIG. 5A. A voltage waveform 58 is applied to the X electrode, and a voltage waveform 59 is applied to the Y electrode. In both cases, the pulses of the voltage V3 (V) having the same polarity are alternately applied, whereby the relative voltage between the X electrode and the Y electrode is repeatedly inverted. A discharge that occurs in the discharge gas between the X electrode and the Y electrode during this time is called a sustain discharge. Here, the sustain discharge is alternately performed in a pulse manner.

  Further, as shown in Patent Document 1, a reset method is proposed in which a weak discharge is caused by slowly increasing the voltage during the reset period 49.

  Furthermore, in addition to the AC in-plane discharge type PDP, a counter discharge PDP has been proposed as shown in Patent Document 2. The electrode-facing discharge PDP generates display discharge between electrodes provided on a pair of opposing substrates, so that the luminance can be improved without shortening the lifetime.

Japanese Patent No. 3394010 Japanese Patent Laid-Open No. 2001-101973

  However, in a panel having a counter discharge structure, even if the voltage is slowly increased to cause a weak discharge during the reset period, the discharge occurs at a stretch, and the conventional counter discharge panel cannot realize a weak discharge.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a counter discharge structure display panel having a discharge gas to which a weak reset discharge can be applied.

  The outline of typical inventions among inventions disclosed in this document will be described as follows.

  (1) a pair of electrodes that are formed on at least one inner surface of each of the front substrate and the rear substrate facing each other to perform counter display discharge, and a dielectric film that at least partially covers the pair of electrodes; , He, Ne, Ar, Kr, Xe, a discharge gas containing any one kind of gas or a mixed gas thereof, and a fluorescent film that emits visible light by excitation by ultraviolet rays generated by discharge of the discharge gas , Each having at least a plurality of discharge cells, and a partition wall partitioning the plurality of discharge cells, wherein the discharge gas further includes a molecular gas having a positive electron affinity. A characteristic plasma display panel.

  (2) In the plasma display panel according to (1), when the volume particle (atom, molecule) density of the discharge gas is ng, and the volume particle density of a molecular gas having a positive electron affinity is nA, The composition ratio nA / ng of the molecular gas having a positive electron affinity in the discharge gas is 0.001% to 0.1%.

(3) In the plasma display panel according to (1) or (2), the molecular gas having a positive electron affinity is O ₂ , O ₃ , F ₂ , Cl ₂ , CH, CH ₃ , NH, NH ₂ , CN, HS, NO, NO ₂ , N ₂ O, SO, SO ₂ , SO ₃ , SF ₆ , or a mixed gas thereof.

  (4) An image display system using the plasma display panel according to any one of (1) to (3).

  By applying the present invention, a display panel having a counter discharge structure having a discharge gas to which a weak reset discharge can be applied can be realized, and thereby a PDP with good contrast characteristics and high luminous efficiency can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In all the drawings for explaining the embodiments, parts having the same function are given the same reference numerals, and repeated explanation thereof is omitted.

  FIG. 1 is an exploded perspective view of an embodiment of the plasma display panel of the present invention. A scan electrode 34 is formed on the front substrate 21 in the direction of arrow a, covered with a dielectric 26, and a protective layer 27 is formed thereon. A structure in which the front substrate 21, the scan electrode 34, the dielectric 26, and the protective layer 27 are integrally formed is referred to as a front plate. The partition plate 36 is provided with a grid-like opening. A phosphor 32 is applied to the wall surface of the opening, and a black matrix 37 is formed on the upper surface of the partition plate 36.

  1 is an example in which a circular grid-like opening is provided in the partition plate 36, and FIG. 6 is an example in which a square grid-like opening is provided in the partition plate 36. The grid-like opening may have other shapes. The black matrix 37 is made of a black material, defines a boundary of a window (opening) that emits visible light from each discharge cell to the outside of the front substrate 21, and fills a gap between the windows (openings) with the black material. Is. The partition plate 36 is a glass plate made of substantially the same material as the front substrate 21 and the back substrate 28 and can be manufactured by a sandblasting method, a screen printing method, a method using a photosensitive rib material, or a machining method. The black matrix 37 can be produced by mixing a glass material with a metal such as chromium or carbon as a pigment.

  A data electrode 35 is formed on the back substrate 28 in the direction indicated by the arrow b, covered with a dielectric 30, and a protective layer 27 is formed thereon to manufacture a back plate.

  FIG. 7 is a cross-sectional view (cross-sectional view taken along the line V-V ′) after assembling the plasma panel as viewed from the direction of the arrow b in FIGS. 1 and 6. A grid-like opening is provided in the partition plate 36 to form a discharge space 33. At this time, the wall surface of the grid-shaped opening is inclined on the partition plate 36, and the opening on the front plate 21 side is made wider than the opening on the back plate 28 side so that visible light generated on the surface of the phosphor 32 can be efficiently viewed. You may make it take out (not shown).

  In assembling the plasma panel, first, frit glass or the like (not shown) is provided around the front substrate 21 and the rear substrate 28, and the front substrate 21, the opposing scan electrode 34 and the data electrode 35 are orthogonal to each other. The three layers of the partition plate 36 and the back substrate 28 are bonded together and hermetically sealed. Next, after removing residual impurities by gasification from a P tube (for gas supply / exhaust) provided in the periphery of the plasma panel, the plasma is evacuated, a discharge gas is introduced, and the P tube is sealed.

  When a voltage is applied between the scan electrode 34 and the data electrode 35 facing each other, plasma is generated by ionization of the discharge gas, and ultraviolet rays from the plasma excite the phosphor 32 to emit light, and light emission from the phosphor 32 is as follows. A display screen is formed by light emitted from each discharge cell through the front substrate 21.

  Here, in the conventional AC in-plane discharge method, the distance between the discharge electrodes is about 0.1 mm. Although it is known that the luminous efficiency is improved when the distance between the electrodes is increased, in the in-plane discharge method, as can be seen from FIG. 2, the only way to increase the distance between the electrodes is to increase in the in-plane direction. For this reason, it has been difficult to increase the distance between the electrodes without changing the cell pitch size of the pixel. However, when the opposed discharge method is adopted, the distance between the discharge electrodes can be increased in the vertical direction, so that the distance between the discharge electrodes is increased to 0.2 mm or more without changing the pixel cell pitch size. The luminous efficiency can be improved.

  Here, an area obtained by projecting the space occupied by one of the plurality of discharge cells onto the front substrate 21 is S1, and visible light from one of the discharge cells is emitted outside the front substrate 21. When the area of the window portion on the front substrate 21 is S2, S2 / S1 is the aperture ratio. Usually, in the general AC in-plane discharge method, the aperture ratio is 0.45 or more. However, if the aperture ratio can be further reduced, deeper black can be expressed and the contrast is improved. In the counter discharge system in the present embodiment, it is possible to narrow the grid-like opening of the partition plate 36 and set the opening ratio to 0.4 or less. At this time, it is apparent from the structure that it can be realized without changing the inter-electrode distance as in the AC in-plane discharge method. Thereby, contrast can be improved.

  As described above, the light emission efficiency and the contrast can be improved in the counter discharge PDP in the present embodiment.

  Next, the operation principle of this embodiment will be described. The role of the reset period in the AC type PDP is to erase the discharge history remaining in the previous subfield, align the wall charges of all the discharge cells in the same state, and control the state. As a result, in the subsequent writing period, a discharge cell for image display is selected, and an image is displayed in the sustain discharge period.

  If the above-mentioned role can be fulfilled in the reset period, the intensity of discharge in the reset discharge does not matter. However, when a strong discharge is generated in the reset period, light generated by the discharge is a cause, and when black is displayed, deep black cannot be displayed, resulting in deterioration of display contrast. Therefore, the reset discharge needs to be as weak and weak as possible, and a weak discharge is created by gradually increasing the voltage. In general, such a drive may be used in a surface discharge type ACPDP.

  However, in a panel having a counter discharge structure, even if the voltage is slowly increased to cause a weak discharge during the reset period, the discharge occurs at a stretch, and the conventional counter discharge panel cannot realize a weak discharge.

  The reason why such a weak discharge can be realized in the surface discharge structure is as follows. In the case of surface discharge, the distance between the electrodes is short and the strength of the electric field is strongest only at the tip portion facing between the electrodes, and a uniform electric field is not formed in parallel over the entire electrode surface. Therefore, when the discharge is started at the site where the discharge start voltage is reached, the charged particles having the opposite charge attach to the electrode at the moment when the plasma starts to grow, and simultaneously form a wall charge. Work to counteract. Therefore, it is considered that a weak reset discharge can be realized without a large discharge. However, even in the case of surface discharge, if the application time of the reset voltage is short and applied suddenly, a weak reset discharge does not occur, and a large discharge starts.

  Therefore, in the present embodiment, the following is performed in order to realize a weak reset in the counter discharge. In the counter discharge, the voltage is slowly increased so that the voltage applied to the discharge space reaches the discharge start voltage and the plasma starts to grow at the moment the plasma starts to grow, preventing the discharge from occurring at once. Like that. That is, by adding a molecular gas having a positive electron affinity to the discharge gas, the plasma growth may be suppressed at the moment when the plasma starts to grow. Thereby, it is possible to prevent the discharge from occurring at once.

  The discharge gas greatly affects the plasma formation process depending on the plasma state such as discharge voltage, discharge current, electron temperature, electron density, and ion density.

  The growth of plasma will be described. When a voltage is applied between the electrodes, the first electrons accidentally generated in the discharge space reach the anode while repeating the ionization according to the electric field in the discharge space to increase the electron density and ion density, and the remaining positive ions are the cathode. To release secondary electrons, and the secondary electrons go toward the anode while ionizing again. By repeating this ionization doubling and secondary electron emission, plasma grows.

  Here, an increase in electrons can be suppressed by adding a molecular gas having a positive electron affinity to the discharge gas.

Electron Affinity is defined as the energy released when a molecule combines with an electron to form an anion. If M is a molecule, e ⁻ is an electron, and E is an energy, it can be shown as follows.

^{M + e - = M - +} E
If the electron affinity is a positive value (E> 0), the state in which electrons are received is more stable. That is, a molecule having a positive electron affinity is likely to adsorb electrons. Due to the effect of molecules having a positive electron affinity, an increase in electrons can be suppressed in the process of plasma growth.

  Table 1 shows a summary of molecules having a positive electron affinity and their electron affinity values.

  Here, the composition ratio in the discharge gas is defined and measured as follows. The volumetric particle (atom, molecule) density of the discharge gas is ng, the volume particle density of a component particle (atom, molecule) in the discharge gas is nA, and the composition ratio of the component particle (atom, molecule) in the discharge gas Is defined as nA / ng.

  The above definition can be expressed and measured as follows according to the laws of physics: In other words, if the total pressure of the discharge gas is Pg and the partial pressure PA of a certain component particle (atom, molecule) in the discharge gas is, the composition ratio of a certain component particle (atom, molecule) in the discharge gas is PA / Pg. I can express. The total pressure can be measured with a pressure gauge. In addition, the partial pressure and total pressure of each component can be measured by analyzing the gas component using, for example, a mass analyzer.

  The main component of the discharge gas is formed from any one of the rare gases of He, Ne, Ar, Kr, and Xe, or a mixed gas thereof, and molecular gases having a positive electron affinity are those discharge gases. It is desirable to add a small amount to The reason is as follows. The ultraviolet rays for exciting the phosphor and causing the PDP to emit light mainly use the ultraviolet rays generated from the rare gas, and the generation amount of these ultraviolet rays decreases with the reduction of the rare gas. This is because the light cannot be emitted brightly. Further, as described below, if too much molecular gas having a positive electron affinity is added too much, the discharge voltage increases rapidly, which hinders the driving of the PDP. Moreover, the role which suppresses the increase in the electron in the process which a plasma grows is fully fulfilled only by adding a trace amount of molecular gas with positive electron affinity.

In the panel having the above-mentioned opposing discharge structure, a total pressure of 650 hPa is added by adding 0.001%, 0.01%, 0.1%, and 0.2% of O ₂ to the Ne (92%)-Xe (8%) discharge gas, respectively. Was created respectively. Similarly, SF ₆ was added to Ne (92%)-Xe (8%) discharge gas at 0.001%, 0.01%, 0.1%, and 0.2%, respectively, to produce panels having a total pressure of 650 hPa. In addition, as a reference, a panel with a total pressure of 650 hPa with a Ne (92%)-Xe (8%) discharge gas to which no molecular gas was added was prepared.

  Each of the panels was connected to a drive circuit, and a drive voltage was applied to the scan electrode 34 and the data electrode 35.

FIG. 8 shows the result of examining the discharge voltage in each of the prepared panels. In each of O _{2 and} SF _6, the voltage increases as the composition ratio increases, and the voltage starts to increase suddenly when the composition ratio exceeds 0.1%.

In a panel to which 0.2% of O ₂ or SF ₆ gas is added, the discharge voltage becomes too high, and the effect of increasing the voltage is larger than the effect of causing weak discharge, which hinders the driving of the PDP. Will come.

  There are two possible reasons for the voltage rise. When a large amount of molecular gas with positive electron affinity is added to the discharge gas, (1) Electrons generated by ionization doubling and secondary electron emission in the plasma growth process become a molecular gas with positive electron affinity. It is trapped, further ionization doubling is inhibited, and the discharge does not grow unless the voltage is increased greatly. (2) A molecular gas having a positive electron affinity is adsorbed in a large amount on the surface of the protective film 27 and prevents secondary electron emission at the cathode, so that the discharge voltage rises. From the above results, the composition ratio of the molecular gas having a positive electron affinity is preferably 0.1% or less.

Next, as a result of comparing the discharge voltage of a panel to which no molecular gas having a positive electron affinity was added and a panel to which 0.001% of O ₂ or SF ₆ was added, the discharge voltages of the three panels were the same. Here, the amount of trace gas added is adjusted by adjusting the partial pressure of the gas using a pressure gauge. However, the adjustment of the partial pressure is limited to 0.001%, and the concentration below that is the pressure gauge. It is impossible because it exceeds the limit. Furthermore, even if a panel to which a small amount of gas is added is prepared, it is difficult to confirm the composition ratio in gas analysis and mass analysis. From the above, the composition ratio of the molecular gas having a positive electron affinity is preferably 0.001% or more.

  Therefore, the composition ratio of the molecular gas having a positive electron affinity added to the discharge gas is preferably 0.001% or more and 0.1% or less.

Weak discharges during the reset period were evaluated using panels in which O ₂ or SF ₆ was added to Ne (92%)-Xe (8%) discharge gas, respectively, 0.001%, 0.01%, 0.1%. As a result of slowly increasing the voltage to cause a weak discharge, the panel to which the molecular gas was added did not discharge at a stretch and could generate a weak discharge.

From the above, it was found that it is effective to add O ₂ or SF ₆ in the range of 0.001% to 0.1% for the generation of the weak discharge in the reset period in the counter discharge structure panel.

Furthermore, a molecule having a positive electron affinity has a property of adsorbing electrons, as represented by O ₂ or SF ₆ , and this effect can suppress an increase in electrons in the process of plasma growth. Needless to say, it is effective to add a molecule having a positive electron affinity in the range of 0.001% to 0.1%.

  FIG. 9 shows an example of the plasma display device using the PDP shown in the embodiment of the present invention described above and an image display system in which a video source is connected thereto. A drive power supply (also called a drive circuit) receives a display screen signal from a video source, converts it into a PDP drive signal, and drives the PDP.

1 is an exploded perspective view illustrating a part of a PDP according to an embodiment of the present invention. It is a disassembled perspective view which shows a part of AC surface discharge system PDP structure of the conventional structure. It is sectional drawing of the PDP structure of FIG. It is the figure which showed typically the motion of the charged particle in the plasma 10 shown in FIG. It is the figure which showed the operation | movement of 1TV field period which displays one image on PDP. FIG. 5 is an exploded perspective view illustrating a part of a PDP according to another embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the line V-V ′ in a state where the PDP of FIGS. 1 and 6 is assembled. O ₂ or when changing the composition ratio of SF ₆ is a graph showing changes in discharge voltage. It is the figure which showed the image display system using PDP.

Explanation of symbols

3 ... Particles with negative charge (eg, electrons), 4 ... Particles with positive charge (eg, positive ions), 5 ... Positive wall charge, 6 ... Negative wall charge, 10 ... Plasma, 21 ... Front glass substrate , 22-1, 22-2 ... X electrode, 23-1, 23-2 ... Y electrode, 24-1, 24-2 ... X bus electrode, 25-1,25-2 ... Y bus electrode, 26 ... dielectric Body layer, 27 ... protective film, 28 ... back glass substrate, 29 ... A electrode, 30 ... dielectric layer, 31 ... barrier rib (rib), 32 ... phosphor, 33 ... discharge space, 34 ... scan electrode, 35 ... data Electrode, 36 ... partition plate, 37 ... black matrix, 40 ... TV field, 41 to 48 ... subfield, 49 ... reset period, 50 ... write discharge period, 51 ... sustain discharge period, 52 ... applied to one A electrode Voltage waveform, 53 ... voltage waveform applied to the X electrode, 54 ... voltage waveform applied to the i-th electrode of the Y electrode, 55 ... voltage waveform applied to the i + 1-th electrode of the Y electrode, 56 ... i-th row of the Y electrode Scan applied to Pulse, 57 ... scan pulse applied to the (i + 1) th row of the Y electrode, 58 ... voltage waveform applied to the X electrode, 59 ... voltage waveform applied to the Y electrode, 100 ... plasma display panel or PDP, 101 ... Drive circuit, 102 ... Plasma display device (image display device), 103 ... Video source, 104 ... Image display system.

Claims (4)

A pair of electrodes formed on at least one inner surface of each of the front substrate and the rear substrate disposed to face each other and performing a counter display discharge; a dielectric film that at least partially covers the pair of electrodes; Each of a discharge gas containing any one of Ne, Ar, Kr, and Xe or a mixed gas thereof, and a fluorescent film that emits visible light by excitation by ultraviolet rays generated by discharge of the discharge gas, A plurality of discharge cells provided at least;
A barrier rib layer partitioning the plurality of discharge cells ,
Each discharge cell is completely partitioned by the barrier layer,
The barrier rib layer is provided with a plurality of openings that form discharge spaces of the plurality of discharge cells,
The aperture ratio formed by the partition layer is 0.4 or less,
In a plasma display device using a driving method for performing a reset discharge that slowly increases a voltage so as to cause a weak discharge,
The plasma display apparatus, wherein the discharge gas further includes a molecular gas having a positive electron affinity.   2. The plasma display panel device according to claim 1, wherein the discharge gas has a volume particle (atom, molecule) density of ng and a molecular gas having a positive electron affinity has a volume particle density of nA. A plasma display panel device, wherein a composition ratio nA / ng of a molecular gas having a positive electron affinity in a gas is 0.001% to 0.1%. 3. The plasma display panel device according to claim 1, wherein the molecular gas having a positive electron affinity is O ₂ , O ₃ , F ₂ , Cl ₂ , CH, CH ₃ , NH, NH ₂ , CN, A plasma display panel device comprising any one of HS, NO, NO ₂ , N ₂ O, SO, SO ₂ , SO ₃ , and SF ₆ , or a mixed gas thereof.   An image display system using the plasma display panel device according to claim 1.

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