KR20100000741A - Plasma display apparatus and method of manufacturing thereof - Google Patents

Abstract

The present invention relates to a plasma display device and a method of manufacturing the same.

The plasma display device includes an upper substrate and a lower substrate, and a discharge gas including xenon (Xe) is injected into a discharge space between the upper substrate and the lower substrate, and the discharge gas is at least one of nitrogen or oxygen. It characterized in that it further comprises.

The manufacturing method of the plasma display apparatus includes manufacturing an upper substrate and a lower substrate; Sealing the upper substrate and the lower substrate; Injecting nitrogen or oxygen into the discharge space between the sealed upper substrate and the lower substrate, combining the impurities with the impurities, and evacuating them; And injecting a discharge gas into the discharge space.

According to the present invention, there is provided a plasma display device having a long lifetime by improving the efficiency of the plasma display device, improving image quality problems such as persistence bright spots, and reducing a decrease in luminance over time.

Description

Plasma display apparatus and method of manufacturing

The present invention relates to a plasma display device and a method of manufacturing the same, and more particularly, to a discharge gas for light emission of the plasma display device.

The plasma display panel (hereinafter referred to as PDP) displays an image by excitation and emitting phosphors by vacuum ultraviolet rays (VUV) generated when the inert gas is discharged.

Such a PDP is not only large in size and thin in thickness, but also has a simple structure and is easy to manufacture, and has a high luminance and high luminous efficiency compared to other flat display devices. In particular, the AC surface-discharge type 3-electrode plasma display panel has advantages of low voltage driving and long life because wall charges are accumulated on the surface during discharge to protect the electrodes from sputtering caused by the discharge.

The discharge gas of the plasma display device is formed by mixing an inert gas such as xenon (Xe). The present invention provides a plasma display device and a manufacturing method for presenting a discharge gas composition and a mixing ratio to obtain high efficiency and long life, and to efficiently remove or utilize the impurity gas generated in the process step.

The present invention relates to a plasma display device and a method of manufacturing the same.

The plasma display device includes an upper substrate and a lower substrate, and a discharge gas including xenon (Xe) is injected into a discharge space between the upper substrate and the lower substrate, and the discharge gas is at least one of nitrogen or oxygen. It characterized in that it further comprises.

The manufacturing method of the plasma display apparatus includes manufacturing an upper substrate and a lower substrate; Sealing the upper substrate and the lower substrate; Injecting nitrogen or oxygen into the discharge space between the sealed upper substrate and the lower substrate, combining the impurities with the impurities, and evacuating them; And injecting a discharge gas into the discharge space.

According to the present invention, it is possible to improve the plasma display device, to improve image quality problems such as persistent bright spots, and to reduce the luminance reduction rate over time, thereby providing a long-life plasma display device.

Hereinafter, a plasma display device according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view illustrating an embodiment of a structure of a plasma display panel.

As shown in FIG. 1, the plasma display panel includes a scan electrode 11, a sustain electrode 12, a sustain electrode pair formed on the upper substrate 10, and an address electrode 22 formed on the lower substrate 20. It includes.

The sustain electrode pairs 11 and 12 generally include transparent electrodes 11a and 12a and bus electrodes 11b and 12b formed of indium tin oxide (ITO), and the bus electrodes 11b and 12b. 12b) may be formed of a metal such as silver (Ag) or chromium (Cr) or a stack of chromium / copper / chromium (Cr / Cu / Cr) or a stack of chromium / aluminum / chromium (Cr / Al / Cr). . The bus electrodes 11b and 12b are formed on the transparent electrodes 11a and 12a to serve to reduce voltage drop caused by the transparent electrodes 11a and 12a having high resistance.

Meanwhile, according to the exemplary embodiment of the present invention, the sustain electrode pairs 11 and 12 may not only have a structure in which the transparent electrodes 11a 12a and the bus electrodes 11b and 12b are stacked, but also the buses without the transparent electrodes 11a and 12a. Only the electrodes 11b and 12b may be configured. This structure does not use the transparent electrodes (11a, 12a), there is an advantage that can lower the cost of manufacturing the panel. The bus electrodes 11b and 12b used in this structure may be various materials such as photosensitive materials in addition to the materials listed above.

Light between the scan electrodes 11 and the sustain electrodes 12 between the transparent electrodes 11a and 12a and the bus electrodes 11b and 11c to absorb external light generated outside the upper substrate 10 to reduce reflection. A black matrix (BM, 15) is arranged that functions to block and to improve the purity and contrast of the upper substrate 10.

The black matrix 15 according to the exemplary embodiment of the present invention is formed on the upper substrate 10, the first black matrix 15 and the transparent electrodes 11a and 12a formed at positions overlapping the partition wall 21. And the second black matrices 11c and 12c formed between the bus electrodes 11b and 12b. Here, the first black matrix 15 and the second black matrices 11c and 12c, also referred to as black layers or black electrode layers, may be simultaneously formed and physically connected in the formation process, or may not be simultaneously formed and thus not physically connected. .

In addition, when physically connected and formed, the first black matrix 15 and the second black matrix 11c and 12c may be formed of the same material, but may be formed of different materials when they are formed separately.

The upper dielectric layer 13 and the passivation layer 14 are stacked on the upper substrate 10 having the scan electrode 11 and the sustain electrode 12 side by side. Charged particles generated by the discharge are accumulated in the upper dielectric layer 13, and the protective electrode pairs 11 and 12 may be protected. The protective film 14 protects the upper dielectric layer 13 from sputtering of charged particles generated during gas discharge, and increases emission efficiency of secondary electrons.

In addition, the address electrode 22 is formed in a direction crossing the scan electrode 11 and the sustain electrode 12. In addition, a lower dielectric layer 24 and a partition wall 21 are formed on the lower substrate 20 on which the address electrode 22 is formed.

In addition, the phosphor layer 23 is formed on the surfaces of the lower dielectric layer 24 and the partition wall 21. The partition wall 21 has a vertical partition wall 21a and a horizontal partition wall 21b formed in a closed shape, and physically distinguishes discharge cells, and prevents ultraviolet rays and visible light generated by the discharge from leaking into adjacent discharge cells.

In an embodiment of the present invention, not only the structure of the partition wall 21 illustrated in FIG. 1, but also the structure of the partition wall 21 having various shapes may be possible. For example, a channel in which a channel usable as an exhaust passage is formed in at least one of the differential partition structure, the vertical partition 21a, or the horizontal partition 21b having different heights of the vertical partition 21a and the horizontal partition 21b. A grooved partition structure having a groove formed in at least one of the type partition wall structure, the vertical partition wall 21a, or the horizontal partition wall 21b may be possible.

Here, in the case of the differential partition wall structure, the height of the horizontal partition wall 21b is more preferable, and in the case of the channel partition wall structure or the groove partition wall structure, it is preferable that a channel is formed or the groove is formed in the horizontal partition wall 21b. something to do.

Meanwhile, in one embodiment of the present invention, although the R, G and B discharge cells are shown and described as being arranged on the same line, it may be arranged in other shapes. For example, a Delta type arrangement in which R, G, and B discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may be not only rectangular, but also various polygonal shapes such as a pentagon and a hexagon.

In addition, the phosphor layer 23 emits light by ultraviolet rays generated during gas discharge to generate visible light of any one of red (R), green (G), and blue (B). Here, an inert mixed gas such as He + Xe, Ne + Xe and He + Ne + Xe for discharging is injected into the discharge space provided between the upper / lower substrates 10 and 20 and the partition wall 21.

FIG. 2 illustrates an embodiment of an electrode arrangement of a plasma display panel, and a plurality of discharge cells constituting the plasma display panel are preferably arranged in a matrix form as shown in FIG. 2. The plurality of discharge cells are provided at the intersections of the scan electrode lines Y1 to Ym, the sustain electrode lines Z1 to Zm, and the address electrode lines X1 to Xn, respectively. The scan electrode lines Y1 to Ym may be driven sequentially or simultaneously, and the sustain electrode lines Z1 to Zm may be driven simultaneously. The address electrode lines X1 to Xn may be driven by being divided into odd-numbered lines and even-numbered lines, or sequentially driven.

Since the electrode arrangement shown in FIG. 2 is only an embodiment of the electrode arrangement of the plasma panel according to the present invention, the present invention is not limited to the electrode arrangement and driving method of the plasma display panel shown in FIG. 2. For example, a dual scan method in which two scan electrode lines among the scan electrode lines Y1 to Ym are simultaneously scanned is possible. In addition, the address electrode lines X1 to Xn may be driven by being divided up and down in the center portion of the panel.

3 is a timing diagram illustrating an embodiment of a time division driving method by dividing a frame into a plurality of subfields. The unit frame may be divided into a predetermined number, for example, eight subfields SF1, ..., SF8 to realize time division gray scale display. Each subfield SF1, ... SF8 is divided into a reset section (not shown), an address section A1, ..., A8 and a sustain section S1, ..., S8.

Here, according to an embodiment of the present invention, the reset period may be omitted in at least one of the plurality of subfields. For example, the reset period may exist only in the first subfield or may exist only in a subfield about halfway between the first subfield and all the subfields.

In each address section A1, ..., A8, a display data signal is applied to the address electrode X, and scan pulses corresponding to each scan electrode Y are sequentially applied.

In each of the sustain periods S1, ..., S8, a sustain pulse is alternately applied to the scan electrode Y and the sustain electrode Z to form wall charges in the address periods A1, ..., A8. Sustain discharge occurs in the discharge cells.

The luminance of the plasma display panel is proportional to the number of sustain discharge pulses in the sustain discharge periods S1, ..., S8 occupied in the unit frame. When one frame forming one image is represented by eight subfields and 256 gradations, each subfield in turn has different sustains at a ratio of 1, 2, 4, 8, 16, 32, 64, and 128. The number of pulses can be assigned. In order to obtain luminance of 133 gradations, cells may be sustained by addressing the cells during the subfield 1 section, the subfield 3 section, and the subfield 8 section.

The number of sustain discharges allocated to each subfield may be variably determined according to weights of the subfields according to the APC (Automatic Power Control) step. That is, in FIG. 3, a case in which one frame is divided into eight subfields has been described as an example. However, the present invention is not limited thereto, and the number of subfields forming one frame may be variously modified according to design specifications. Do. For example, a plasma display panel may be driven by dividing one frame into eight or more subfields, such as 12 or 16 subfields.

The number of sustain discharges allocated to each subfield can be variously modified in consideration of gamma characteristics and panel characteristics. For example, the gray level assigned to subfield 4 may be lowered from 8 to 6, and the gray level assigned to subfield 6 may be increased from 32 to 34.

4 is a timing diagram illustrating an embodiment of driving signals for driving a plasma display panel with respect to the divided subfield.

The subfield is a wall formed by a pre-reset section and a pre-reset section for forming positive wall charges on the scan electrodes Y and negative wall charges on the sustain electrodes Z. A reset section for initializing the discharge cells of the entire screen using the charge distribution, an address section for selecting the discharge cells, and a sustain section for maintaining the discharge of the selected discharge cells.

The reset section includes a setup section and a setdown section. In the setup section, rising ramp waveforms (Ramp-up) are simultaneously applied to all scan electrodes to generate fine discharges in all discharge cells. Thus, wall charges are generated. In the set-down period, a falling ramp waveform (Ramp-down) falling at a positive voltage lower than the peak voltage of the rising ramp waveform (Ramp-up) is simultaneously applied to all scan electrodes (Y), thereby erasing discharge in all discharge cells. Is generated, thereby eliminating unnecessary charges during wall charges and space charges generated by the setup discharges.

In the address period, a negative scan signal scan is sequentially applied to the scan electrode, and at the same time, a data signal data having a positive address voltage Va is applied to the address electrode X. The address discharge is generated by the voltage difference between the scan signal and the data signal and the wall voltage generated during the reset period, thereby selecting the cell. Meanwhile, a signal for maintaining a sustain voltage is applied to the sustain electrode during the set down period and the address period.

In the sustain period, a sustain pulse having a sustain voltage Vs is alternately applied to the scan electrode and the sustain electrode to generate sustain discharge in the form of surface discharge between the scan electrode and the sustain electrode.

The driving waveforms shown in FIG. 4 are exemplary embodiments of signals for driving the plasma display panel according to the present invention, and the present invention is not limited to the waveforms shown in FIG. 4. For example, the pre-reset period may be omitted, and the polarity and the voltage level of the driving signals illustrated in FIG. 4 may be changed as necessary. After the sustain discharge is completed, an erase signal for erasing wall charge may be applied to the sustain electrode. May be authorized. In addition, the single sustain driving may be performed by applying the sustain signal to only one of the scan electrode (Y) and the sustain (Z) electrode to generate a sustain discharge.

The plasma display device of the present invention includes an upper substrate and a lower substrate. A discharge gas including xenon (Xe) is injected into a discharge space between the upper substrate and the lower substrate, and the discharge gas is nitrogen or oxygen. It characterized in that it further comprises at least one.

       When sufficient voltage is applied between the electrodes, the gas is ionized by collision of electrons and gas, and when these gas ions reach the cathode, secondary electrons are released from the protective film. As these secondary electrons move toward the anode, a large amount of free electrons are generated by collision with a gas present in the cell, and discharge begins. At this time, the generated free electrons excite Xe atoms, and VUV (vacuum ultra violet) is emitted from their excitation species, which in turn excite the phosphors to obtain visible light. As described above, in the plasma display panel, the lifetime of the panel is determined by the etching of the protective film by the gas ions or the deterioration of the phosphor, which is highly dependent on the type of discharge gas used. Can improve the service life.

FIG. 5 is a diagram showing experimental results of measuring luminance change when oxygen (O ₂ ) and nitrogen (N ₂ ) are added to the discharge gas.

In the gas injection process, a discharge gas in which 0.1% and 0.3% of oxygen (O ₂ ) and nitrogen (N ₂ ) are mixed based on a mixed gas of xenon (Xe) and neon (Ne) having a xenon (Xe) content ratio of 8%, respectively Inject. Acceleration tests were conducted with luminance measured in full white.

      The luminance half life of the display device is defined as the life of the product, which is the time until the luminance drops to 50% of the initial luminance value. Therefore, the lifetime characteristic can be examined as the luminance reduction rate.

FIG Referring to Figure 5, a more brightness than when the injection of oxygen (O ₂₎ and nitrogen (N ₂₎ as the case of the oxygen (O ₂₎ and nitrogen-based panel (REF) was not added (N ₂₎ over time It can be seen that the decrease. Comparing the luminance after 100 hours of acceleration time compared to the initial luminance, the reference panel REF without oxygen (O ₂ ) and nitrogen (N ₂ ) shows a luminance value of about 93% of the initial luminance. However, when 0.1% of oxygen (O ₂ ) is added, the luminance is about 98% compared to the initial luminance, and when 0.3% is added, the luminance is about 103% compared to the initial luminance. It can be seen that the reduction rate is reduced and the life characteristics are significantly improved. As the oxygen content increases, it is advantageous in terms of the life of the plasma display device.

Even when nitrogen (N ₂ ) is added, the reference panel has a luminance value of about 99% compared to the initial luminance when added 0.1% and about 100% compared to the initial luminance when added 0.3%. Compared with this, the luminance reduction rate is reduced and the lifespan characteristics are significantly improved. Increasing the content of nitrogen is advantageous in terms of the lifetime of the plasma display device.

       In the phosphor layer and the protective film, metal oxides are mainly used, and impurities remaining in the discharge cell may be adsorbed on the surface of the metal oxide, thereby degrading the phosphor layer and the protective film. Degradation of the phosphor layer and the protective film deteriorates the lifetime characteristics of the plasma display device.

Oxygen (O ₂ ) and nitrogen (N ₂ ) may chemically bond with impurities to prevent impurities from being adsorbed on the phosphor layer or the protective film, thereby reducing the degree of deterioration of the phosphor layer and the protective film.

In addition, when the plasma display panel is driven for a long time, a voltage for generating a discharge by impurity gas or contaminant particles present in the plasma display panel is lowered. When the discharge voltage is lowered, an incorrect discharge such as a cell to be turned off may occur. In particular, when the same screen is continuously displayed and then switched to another screen, an afterimage curve in which an afterimage remains may occur. There is a problem that a point occurs. Oxygen (O ₂ ) and nitrogen (N ₂ ) reduce the MgO film surface content of H ₂ or the gas lowering the discharge contact pressure, thereby reducing the absolute amount of impurity gas such as H ₂ moving during discharge, thereby improving the afterimage bright point characteristic.

Vs_min Vs_max Va_min Power Consumption (W) Module efficiency (lm / W) REF 174.75 198.50 44.23 186.46 1.36 O2 0.1% 177.00 200.20 48.76 190.58 1.59 O2 0.3% 179.00 201.40 48.62 195.18 1.41 O2 0.5% 184.75 204.50 45.33 214.59 1.02 N2 0.1% 172.60 196.20 48.64 176.98 1.62 N2 0.3% 176.25 202.50 47.83 189.74 1.51 N2 0.5% 182.00 210.00 43.63 199.37 1.13

Table 1 above shows the maximum discharge holding voltage Vs_max that can address all pixels under a given operating condition, the minimum value of sustain voltage Vs_min that can sufficiently address all pixels under a given operating condition, minimum address voltage Va_min, power consumption, module efficiency. This is the result of measuring the electrical characteristics of the plasma display device.

Referring to Table 1, as the contents of oxygen (O ₂ ) and nitrogen (N ₂ ) increases, the value of Vs_max and Vs_min also increases. As the driving voltages increase, the power consumption increases with increasing content. In addition, the difference between the Vs_max and Vs_min values also increases. As the difference between these two values increases, the afterimage bright point margin increases, and thus, the addition of oxygen and nitrogen can improve the afterimage bright point.

6 is a view showing the power consumption and module efficiency change rate compared to the reference panel (REF) without adding oxygen and nitrogen. Table 2 below is the comparison data shown in FIG.

REF O2 0.1% O2 0.3% O2 0.5% N2 0.1% N2 0.3% N2 0.5% Power consumption 1.66 4.11 15.08 -5.60 1.21 6.92 Module efficiency 3.50 -8.05 -25.18 5.28 -1.76 -16.82

Looking at Figure 6 and Table 2, the power consumption tends to increase as the content of oxygen and nitrogen increases. This is because the discharge start voltage and the discharge sustain voltage increase with increasing content.

Module efficiency tends to decrease with increasing oxygen and nitrogen content, especially at 0.5% or more. This is because the luminance value is lowered and the power consumption tends to be larger.

Therefore, the mixing ratio of the nitrogen or oxygen to the discharge gas is preferably 0.1% to 0.3%, and the content ratio of 0.1% is ideal.

The nitrogen or oxygen may be injected into the discharge space before the impurity gas is exhausted, and in this case, the residual amount after the exhaust process of the nitrogen or oxygen may be set so that the mixing ratio with respect to the discharge gas is 0.1% to 0.3%.

Looking at the process of injecting the discharge gas into the plasma display panel, first, the upper and lower substrates of the plasma display panel are manufactured and sealed. An exhaust hole is formed in the upper substrate or the lower substrate to forcibly exhaust the impurity gas existing therein, and discharge gas is injected in a state of having a constant vacuum degree. At this time, when the discharge gas is injected in a state where the impurity gas or air present in the panel is not sufficiently exhausted, a large amount of impurity gas such as CO, CO ₂ , H ₂ 0 is present, and the discharge start voltage characteristics for the discharge start, The driving voltage characteristics and luminance characteristics are adversely affected.

The nitrogen is a material having a high binding energy and is injected for firing in the sealing process of the plasma display panel, and may be injected before the impurity gas exhausting process. However, as discussed above, when a large amount of nitrogen is present even after the impurity gas exhaust process, the power consumption may be greatly increased, and the yield efficiency may be greatly reduced. The exhaust process may be set so as to occur. In this case, since a separate nitrogen gas is not injected, there is a cost saving effect. In addition, since nitrogen has a very high vapor pressure, it is unlikely to be adsorbed on the surface of magnesium oxide or the phosphor, so that it does not take a long time when exhausting.

Oxygen is easily incorporated into a carbon-based compound, such as CH, which is mainly included in a binder inserted in the process of making impurities, in particular, a protective film and a phosphor material, and becomes a main cause of impurity adsorption. Therefore, the oxygen is injected prior to the exhaust process to combine with the carbon-based compound to generate a gas such as CO, H ₂ O and the like to exhaust the efficiency of impurity exhaust can be improved.

However, as discussed above, when a large amount of oxygen exists even after the impurity gas exhaust process, the power consumption may increase and the yield efficiency may be greatly reduced. The exhaust process can be set to take place. In this case, since a separate oxygen gas is not injected, there is a cost saving effect.

7 is a view showing a change in the discharge start voltage according to the content ratio of xenon (Xe).

The addition of oxygen and nitrogen according to the present invention can increase the discharge start voltage and increase the power consumption according to the ratio thereof. Therefore, it is preferable to lower the discharge start voltage by optimizing the mixing ratio of other discharge gases. In the plasma display device, the ultraviolet light stimulates the phosphor to generate visible light and displays the desired image on the screen by using the light, and the luminance characteristic is affected by the ultraviolet light generated from the discharge gas. Xenon has the longest wavelength among the inert gases, so that the brightness characteristics are improved as the content ratio is increased, but the discharge start voltage is increased.

Referring to FIG. 7, the discharge start voltage gradually increases as the content ratio of xenon (Xe) increases. The rate of increase also increases and accumulates as the content ratio increases. Until the content ratio is about 20%, the rising slope is constant and stable, but if it exceeds 20%, the rising slope becomes steeper and the discharge starting voltage increases. In particular, the discharge start voltage rises sharply at 25% or more.

Therefore, the mixing ratio of the xenon (Xe) to the discharge gas is preferably 20%.

      The discharge gas may further include at least one of neon (Ne), helium (He), argon (Ar), and krypton (Kr).

      Xenon (Xe) has lower ionization energy than quasi-safe state energy of buffer gas such as Ne, Helium, etc., so the discharge start voltage due to the penning effect and the sputtering of the dielectric layer Effect by mixing such as damage prevention can be obtained. The penning effect refers to a phenomenon in which, when a small amount of different kinds of gases are mixed with a gas forming a metastable state, the discharge start voltage is lowered when the ionization voltage of the additive gas is lower than the metastable excitation voltage of the original gas.

     In addition, a discharge gas to which argon (Ar) or krypton (Kr) is further added may be used to increase the amount of electrons that excite xenon (Xe). Argon can also contribute to improved color purity. When small amounts of argon (Ar) or krypton (Kr) are added, the xenon excitation, a 147 nm vacuum ultraviolet ville source that is directly affected by the density of electrons, is rapidly increased due to the increase in author production due to the penning effect. The density of (Xe) also increases to increase the luminance. In addition, increasing the electron density means that the discharge occurs easily, so that the discharge voltage is lowered.

In addition, the discharge gas may further include hydrogen (H ₂ ). Even when a small amount of hydrogen is contained, the discharge start voltage and the discharge sustain voltage can be lowered.

      8 is a block diagram showing the flow of a method of manufacturing a plasma display device according to the present invention.

      Method of manufacturing a plasma display device of the present invention, the step of manufacturing the upper substrate and the lower substrate (S10); Sealing the upper substrate and the lower substrate (S20); Injecting nitrogen or oxygen into a discharge space between the sealed upper substrate and the lower substrate (S30); Combining the nitrogen or oxygen with impurities and then evacuating (S40); And injecting a discharge gas into the discharge space (S50).

Looking at the process of the discharge gas is injected into the plasma display panel, first, the upper and lower substrates of the plasma display panel is manufactured and sealed. An exhaust hole is formed in the upper substrate or the lower substrate to forcibly evacuate the impurity gas existing therein, and discharge gas is injected into the discharge space between the upper substrate and the lower substrate with a constant degree of vacuum. At this time, when the discharge gas is injected in a state where the impurity gas or air present in the panel is not sufficiently exhausted, a large amount of impurity gas such as CO, CO ₂ , H ₂ 0 is present, and the discharge start voltage characteristics for the discharge start, The driving voltage characteristics and luminance characteristics are adversely affected. Therefore, injecting the nitrogen or oxygen which is easily chemically bonded to the carbon-based impurities before the exhaust process by incorporating the impurities into the impurities and removing them in the exhaust stage may increase the efficiency of removing the impurities in the exhaust process than when nitrogen or oxygen is not injected. .

      In addition, the exhausting step may be characterized in that the nitrogen or oxygen is left to remain so that the mixing ratio to the discharge gas is 0.1% to 0.3%. Then, 0.1% to 0.3% of nitrogen or oxygen may be mixed with the discharge gas without additional injection of nitrogen or oxygen.

      Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

1 is a perspective view showing an embodiment of the structure of a plasma display panel according to the present invention.

2 is a diagram illustrating an embodiment of an electrode arrangement of a plasma display panel.

FIG. 3 is a timing diagram illustrating an embodiment of a method of time-divisionally driving a plasma display panel by dividing one frame into a plurality of subfields.

4 is a timing diagram illustrating an embodiment of a waveform of a driving signal for driving a plasma display panel.

5 is a diagram showing experimental results of measuring luminance change when oxygen and nitrogen are added to a discharge gas.

6 is a view showing the power consumption and module efficiency change rate compared to the reference panel without adding oxygen and nitrogen.

7 is a view showing a change in the discharge start voltage according to the content ratio of xenon (Xe).

8 is a block diagram showing the flow of a method of manufacturing a plasma display device according to the present invention.

Claims (10)

In the plasma display device including an upper substrate and a lower substrate, Discharge gas containing xenon (Xe) is injected into the discharge space between the upper substrate and the lower substrate, The discharge gas further comprises at least one of nitrogen or oxygen. The method of claim 1, And a mixing ratio of the nitrogen to the discharge gas is 0.1% to 0.3%. The method of claim 1, And a mixing ratio of the oxygen to the discharge gas is 0.1% to 0.3%. The method of claim 1, And the nitrogen or oxygen is injected into the discharge space before the impurity gas exhausting process. The method of claim 4, wherein And the residual amount of the nitrogen or oxygen after the exhausting step is set so that the mixing ratio with respect to the discharge gas is 0.1% to 0.3%. The method of claim 1, And a mixing ratio of the xenon (Xe) to the discharge gas is 20% or less. The method of claim 1, The discharge gas further comprises at least one of neon (Ne), helium (He), argon (Ar), krypton (Kr). The method of claim 1, The discharge gas further comprises a hydrogen (H ₂ ) plasma display device. In the manufacturing method of the plasma display device, Manufacturing an upper substrate and a lower substrate; Sealing the upper substrate and the lower substrate; Injecting nitrogen or oxygen into a discharge space between the sealed upper substrate and the lower substrate; Combining the nitrogen or oxygen with impurities and then evacuating it; And And injecting a discharge gas into the discharge space. The method of claim 9, The evacuating may include maintaining the nitrogen or oxygen so that the mixing ratio of the discharge gas is 0.1% to 0.3%.

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