KR20100113896A - Plasma display device - Google Patents

Abstract

Plasma display device according to the invention the upper substrate; First and second electrodes formed on the upper substrate; A lower substrate disposed to face the upper substrate; A third electrode formed on the lower substrate; A horizontal barrier rib formed on the lower substrate in a direction crossing the third electrode, wherein at least one of the first and second electrodes is formed as a single layer, and at least a portion of the third electrode overlaps with the third electrode. And a first electrode line having two or more inclinations, and a second electrode line connected to the first electrode line and formed in a direction crossing the third electrode. The shortest distance between the transverse bulkheads is different from each other.

According to the plasma display device according to the present invention configured as described above, the manufacturing cost of the plasma display panel can be reduced by removing the transparent electrode made of indium tin oxide (ITO), and at the same time the efficiency is improved.

Description

Plasma display device

The present invention relates to a plasma display device, and more particularly, to an electrode structure of a panel provided in the plasma display device.

In general, a plasma display panel is a partition wall formed between an upper substrate and a lower substrate to form one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because a thin and light configuration is possible.

In a typical plasma display panel, a scan electrode and a sustain electrode are formed on an upper substrate, and the scan electrode and the sustain electrode are laminated with a transparent electrode and a bus electrode made of expensive indium tin oxide (ITO) to secure an aperture ratio of the panel. Has a structure.

Recently, the focus is on manufacturing a plasma display panel that can secure sufficient viewing characteristics, driving characteristics, and the like, while reducing manufacturing costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display device capable of reducing the manufacturing cost of a panel and improving the brightness of a display image by removing the transparent electrode made of ITO in a panel provided in the plasma display device.

Plasma display device according to the invention the upper substrate; First and second electrodes formed on the upper substrate; A lower substrate disposed to face the upper substrate; A third electrode formed on the lower substrate; A horizontal barrier rib formed on the lower substrate in a direction crossing the third electrode, wherein at least one of the first and second electrodes is formed as a single layer, and at least a portion of the third electrode overlaps with the third electrode. And a first electrode line having two or more inclinations, and a second electrode line connected to the first electrode line and formed in a direction crossing the third electrode. The shortest distance between the transverse bulkheads is different from each other.

According to the plasma display device according to the present invention configured as described above, the manufacturing cost of the plasma display panel can be reduced by removing the transparent electrode made of indium tin oxide (ITO), and at the same time the efficiency is improved.

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 according to the present invention.

Referring to FIG. 1, the plasma display panel includes an upper panel 10 and a lower panel 20 that are bonded at predetermined intervals.

The upper panel 10 includes a pair of sustain electrodes 12 and 13 formed in pairs on the upper substrate 11. The sustain electrode pairs 12 and 13 are divided into the scan electrode 12 and the sustain electrode 13 according to their function. The sustain electrode pairs 12 and 13 are covered by the upper dielectric layer 14 which limits the discharge current and insulates the electrode pairs, and a protective film layer 15 is formed on the upper dielectric layer 204, so that during the gas discharge. The upper dielectric layer 14 is protected from sputtering of charged particles generated, and the emission efficiency of secondary electrons is increased.

Discharge gas is injected into the discharge space provided between the upper substrate 11, the lower substrate 21, and the partition wall 22. It is preferable that 10% or more of xenon (Xe) is contained in discharge gas. When xenon (Xe) is included in the discharge gas with the above mixing ratio, the discharge / light emitting efficiency and luminance of the plasma display panel may be improved.

The lower panel 20 is formed with a plurality of discharge spaces, that is, partitions 22 partitioning the discharge cells on the lower substrate 21. In addition, the address electrodes 23 are disposed in the direction crossing the sustain electrode pairs 12 and 13, and the surface of the lower dielectric layer 25 and the partition wall 22 are emitted by ultraviolet light generated during gas discharge to generate visible light. Phosphor 24 is applied.

In this case, the partition wall 22 includes a vertical partition wall 22a formed in a direction parallel to the address electrode 23, and a horizontal partition wall 22b formed in a direction crossing the address electrode 23 to physically discharge the discharge cell. It distinguishes and prevents ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells.

Further, in the plasma display panel according to the present invention, the sustain electrode pairs 12 and 13 consist of only opaque metal electrodes. That is, the ITO, which is a conventional transparent electrode material, is not used, and the sustain electrode pairs 12 and 13 are formed using silver (Ag), copper (Cu), chromium (Cr), or the like, which is a material of the conventional bus electrode. . That is, each of the electrode pairs 12 and 13 of the plasma display panel according to the present invention does not include a conventional ITO electrode and is formed of one layer of a bus electrode.

For example, each of the sustain electrode pairs 12 and 13 according to the embodiment of the present invention is preferably formed of silver (Ag), and the silver (Ag) preferably has photosensitive properties. In addition, each of the sustain electrode pairs 12 and 13 according to an exemplary embodiment of the present invention has a darker color and lower light transmittance than the upper dielectric layer 14 or the lower dielectric layer 14 formed on the upper substrate 11. Can have properties.

In the discharge cells, the phosphor layers 24 of R (Red), G (Green), and B (Blue) may each have a symmetrical structure having the same pitch or asymmetrical structures having different pitches. When the discharge cells have an asymmetrical structure, the discharge cells may have the order of the width of the R (Red) cell <the width of the G (Green) cell <the width of the B (Blue) cell.

As shown in FIG. 1, sustain electrodes 12 and 13 may be formed of a plurality of electrode lines in one discharge cell. That is, the first storage electrode 12 is formed of two electrode lines 12a and 12b, and the second storage electrode 13 is arranged symmetrically with the first storage electrode 12 based on the center of the discharge cell. And may be formed of two electrode lines 13a and 13b.

It is preferable that the first and second sustain electrodes 12 and 13 are scan electrodes and sustain electrodes, respectively. This takes into account the aperture ratio and the discharge diffusion efficiency by using the opaque sustain electrode pairs 12 and 13. That is, an electrode line having a narrow width is used in consideration of the aperture ratio, while a plurality of electrode lines are used in consideration of discharge diffusion efficiency. In this case, the number of electrode lines may be determined by considering the aperture ratio and the discharge diffusion efficiency simultaneously.

Since the structure shown in FIG. 1 is only an embodiment of the structure of the plasma panel according to the present invention, the present invention is not limited to the structure of the plasma display panel shown in FIG. For example, a black matrix (BM) that absorbs external light generated from the outside to reduce reflection and improves the purity and contrast of the upper substrate 11 includes a black matrix (BM). 11) can be formed on, the black matrix can be both a separate and integral BM structure.

In addition, the partition structure of the panel illustrated in FIG. 1 represents a close type in which the discharge cells have a closed structure by the vertical partition 22a and the horizontal partition 22b, but includes a stripe type including only the vertical partition. Stripe Type) or a structure such as a Fish Bone having a protrusion formed at a predetermined interval on the vertical partition wall.

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 or left and right 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 an intermediate subfield of the first subfield and all 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. . 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 a drive signal for driving a plasma display panel.

The subfield forms a wall reset formed by a pre-reset section and a pre-reset section for forming the positive wall charges on the scan electrodes Y and the negative wall charges on the sustain electrodes Z. It may include a reset section for initializing the discharge cells of the entire screen by using the 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 is composed of 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 discharge in all discharge cells. 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 the scan electrodes (Y), thereby erasing discharge in all the discharge cells. Therefore, the unnecessary charges of the wall charges and the space charges generated by the setup discharges are eliminated.

In the address period, a scan signal having a negative scan voltage Vsc is sequentially applied to the scan electrode, and a positive data signal is applied to the address electrode X at the same time. 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. On the other hand, in order to increase the efficiency of the address discharge, the sustain bias voltage Vzb is applied to the sustain electrode during the address period.

During the address period, the plurality of scan electrodes Y may be divided into two or more groups, and scan signals may be sequentially supplied to each group, and each of the divided groups may be further divided into two or more subgroups, and the scan signals may be sequentially processed for each subgroup. Can be supplied. For example, the plurality of scan electrodes Y may be divided into a first group and a second group, and scan signals are sequentially supplied to scan electrodes belonging to the first group, and then to scan electrodes belonging to the second group. Scan signals may be supplied sequentially.

According to an embodiment of the present invention, the plurality of scan electrodes Y may be divided into a first group located at an even number and a second group located at an odd number according to a position formed on a panel. In another embodiment, the panel may be divided into a first group positioned above and a second group positioned below the center of the panel.

The scan electrodes belonging to the first group divided by the above method are further divided into a first subgroup located at the even-th and a second subgroup located at the odd (odd), or It may be divided into a first subgroup positioned above and a second group located below, based on the center.

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 width of the first sustain signal or the last sustain signal among the plurality of sustain signals alternately supplied to the scan electrode and the sustain electrode in the sustain period may be greater than the width of the remaining sustain pulses.

After the sustain discharge occurs, an erase period for erasing the wall charge remaining in the scan electrode or the sustain electrode of the selected ON cell in the address period by generating a weak discharge may be further included after the sustain period.

The erase period may be included in all or some of the plurality of subfields, and it is preferable that an erase signal for weak discharge is applied to an electrode to which the last sustain pulse is not applied in the sustain period.

The cancellation signal is a ramp-type signal that gradually increases, a low-voltage wide pulse, a high-voltage narrow pulse, an exponential signal, or a half- sinusoidal pulses can be used.

In addition, a plurality of pulses may be sequentially applied to the scan electrode or the sustain electrode to generate a weak discharge.

The driving waveforms shown in FIG. 4 are examples of signals for driving the plasma display panel according to the present invention, and the present invention is not limited by 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, and an erase signal for erasing wall charge may be applied to the sustain electrode after the sustain discharge is completed. It may be. In addition, a single sustain drive in which a sustain signal is applied to only one of the scan electrode (Y) and the sustain (Z) electrode to generate a sustain discharge is also possible.

5 is a cross-sectional view of a sustain electrode structure of the plasma display panel. FIG. 5 briefly illustrates an arrangement structure of sustain electrode pairs in one discharge cell of a plasma display panel, and arrangement of a black matrix, a floating electrode, and the like is omitted.

As shown in FIG. 5, sustain electrodes are formed on the substrate in pairs symmetrically with respect to the center of the discharge cell. Each of the sustain electrodes is connected to a line portion including at least two electrode lines 511, 512, 531, and 532 crossing the discharge cell and to electrode lines 511 and 531 closest to the center of the discharge cell. Is formed of a protrusion including at least one protruding electrode (513, 533) protruding in the center direction of the discharge cell.

In addition, as shown in FIG. 5, each of the sustain electrodes may further include one connection electrode connecting the two electrode lines. The two electrode lines and the connection electrode have a region overlapping at least a portion of the address electrode 550 formed on the lower substrate.

The electrode lines 511, 512, 531, and 532 cross the discharge cells and extend in one direction of the plasma display panel. The same drive pulse is supplied to the discharge cells positioned on the same electrode line. The electrode lines are formed narrow in width to always keep the aperture ratio. In addition, although a plurality of electrode lines 202a, 202b, 203a, and 203b are used to improve the discharge diffusion efficiency, it is preferable to determine the number of electrode lines in consideration of the aperture ratio.

The protruding electrodes 513 and 533 are connected to the electrode lines 511 and 531 closest to the center of the discharge cell in one discharge cell, and protrude in the center direction of the discharge cell. The protruding electrodes 513 and 533 lower the discharge start voltage when the plasma display panel is driven. As the number of the electrode lines increases, the distance d1 between the electrode lines 511 and 531 adjacent to the discharge cells increases.

Since the discharge start voltage increases due to the distance between the electrode lines 511 and 531, the protruding electrodes 513 and 533 connected to the electrode lines 511 and 531 may be provided. Since the discharge is initiated even between the protruding electrodes 513 and 533 formed close to each other, the discharge start voltage of the plasma display panel can be lowered. Here, the discharge start voltage refers to a voltage level at which discharge starts when a pulse is supplied to at least one of the sustain electrode pairs.

Since the protruding electrode is very small in size, the width of the portion connected to the electrode lines 511 and 531 of the protruding electrodes 513 and 533 is substantially larger than the width of the end portion of the protruding electrode due to the manufacturing process tolerance. It can be formed widely. Moreover, it is also possible to make the width | variety of the tip wider as needed.

The connecting electrode connects the electrode lines of each sustain electrode. The connecting electrode helps the discharge initiated through the protruding electrode to easily diffuse from the center of the discharge cell to the electrode lines 512 and 532.

However, the electrode structure of FIG. 5 has a problem that the aperture ratio is lowered due to the colored sustain electrode, that is, the main discharge region at the center of the discharge cell is covered by the electrode. Therefore, the efficiency may be lower than that of the conventional plasma display panel using the ITO electrode. Without using the ITO electrode, it is necessary to improve the aperture ratio in order to achieve the same or higher luminance of the plasma display device.

Plasma display device according to the invention the upper substrate; First and second electrodes formed on the upper substrate; A lower substrate disposed to face the upper substrate; A third electrode formed on the lower substrate; And a horizontal partition wall formed on the lower substrate in a direction crossing the third electrode.

At least one of the first and second electrodes is formed of a single layer,

And a first electrode line overlapping at least a portion of the third electrode and having at least two inclinations; and a second electrode line connected to the first electrode line and formed in a direction crossing the third electrode. ,

The shortest distance between the first and second electrode lines and the horizontal partition wall is different from each other.

6 is a cross-sectional view illustrating an electrode structure formed on an upper substrate of a plasma display panel according to an embodiment of the present invention.

Referring to FIG. 6, the sustain electrodes 600 and 700, that is, the first and second electrodes according to the exemplary embodiment of the present invention are symmetrically paired with respect to the center of the discharge cell on the substrate.

The discharge cells may include first and second electrodes 600 and 700, horizontal partitions 810 and vertical partitions 820, third electrodes 900, and phosphors (not shown).

At least one of the first and second electrodes 600 and 700 is formed as a single layer, and the first electrode line 610 overlapping at least a portion of the third electrode 900 and having at least two slopes. ) And a second electrode line 620 connected to the first electrode line 610 and formed in a direction crossing the third electrode 900, including the first electrode line 610 and the discharge cell. Among the partitions, the shortest gap g1 between the horizontal partition walls 810 and the shortest gap g2 between the second electrode line 620 and the horizontal partition walls 810 may be different from each other.

Here, the second electrode line 620 does not have a region overlapping with the third electrode 900.

In addition, when the remaining electrodes also have the same symmetrical shape, at least a part of the third electrode 900 overlaps with each other and is connected to the first electrode line 710 and the first electrode line 710 having two or more inclinations. And a second electrode line 720 formed in a direction crossing the third electrode 900. The shortest distance between the first electrode line 710 and the horizontal partition walls among the partition walls partitioning the discharge cell is formed. The shortest gap between the two electrode lines 720 and the horizontal partition wall may be different from each other. Hereinafter, the first electrode 600 will be described.

By forming the electrode so that the first electrode line 610 and the second electrode line 620 are not on the same line, the distance from the other electrode may be partially different even if the protruding electrode is excluded.

In addition, more preferably, the shortest gap g1 between the first electrode line 610 and the horizontal partition wall 810 may be smaller than the shortest gap g2 between the second electrode line 620 and the horizontal partition wall 810. . In this case, since the first electrode line 610 is farther from the center of the discharge cell than the second electrode line 620, the distance d2 of the other sustaining electrode from the center of the discharge cell is equal to that of the first electrode line 610. The second electrode line 620 is larger than the one formed on the same line. Therefore, the area covered by the colored sustain electrode covering the center of the discharge cell is reduced and the aperture ratio is improved.

In FIG. 6, the first electrode line 610 having two or more inclinations, that is, the first electrode line 610 formed with curvature has a shape having a 'c' shape as indicated by a dotted line. In addition, the second electrode line 620 may cross the discharge cells and may extend in a direction parallel to the horizontal partition walls of the partition walls that partition the discharge cells.

In addition, at least one of the first and second electrodes may include at least one first protruding electrode 630 protruding from the first electrode line 610 in a direction parallel to the third electrode 900. That is, the plasma display apparatus according to the present invention may further include a protruding electrode 630 protruding toward the center of the discharge cell from the first electrode line 610 disposed adjacent to the center of the discharge cell. As illustrated in FIG. 6, the number of the first protruding electrodes 630 protruding from the first electrode line 610 may be two.

The width of the first protruding electrode 630 is more preferably 35 to 45 μm.

When the width of the first protruding electrode 630 is equal to the above value, the aperture ratio of the plasma display panel is small so that light reflected from the front surface of the display device is blocked by the protruding electrode, thereby preventing the luminance of the image from decreasing. Can be.

By the first protruding electrode 630, the driving voltage margin can be improved by reducing the discharge start voltage and improving the discharge efficiency, and the lighting delay phenomenon can be reduced by increasing the length of the current path.

In addition, the third electrode line 640 is formed closer to the horizontal partition wall 810 than the first electrode line 610 in a direction parallel to the horizontal partition wall 810; and the third electrode line 640 and the third electrode; The connection electrode 650 connecting the first electrode line 610 may be further included.

In this case, the connection electrode 650 may be formed in parallel with the third electrode 900 and overlap the third electrode 900.

In addition, the plasma display apparatus according to the present invention may further include at least one second protruding electrode 660 protruding from the third electrode line 640 toward the adjacent horizontal partition wall 810. The second protruding electrode 660 helps the discharge initiated at the center of the discharge cell to easily diffuse to the end of the discharge cell.

 That is, the semiconductor device further includes a second protruding electrode 660 protruding from the third electrode line 640 disposed away from the center of the discharge cell in the direction of the horizontal partition wall 810 adjacent thereto, and by the second protruding electrode 660. In addition, since the discharge is diffused to the upper and lower outer regions of the discharge cell, the discharge may be evenly generated in the entire discharge cell region, thereby improving the image quality of the display image.

The length of the second protruding electrode 660 is preferably 50 to 100 μm, and by having the above value, the discharge can be effectively diffused to the discharge space far from the center of the discharge cell.

In addition, the second protruding electrode 660 may extend to the horizontal partition wall that partitions the discharge cell. And, if the aperture ratio can be sufficiently compensated in other parts, it is also possible to partially extend on the transverse bulkhead to further improve the discharge diffusion efficiency.

Widths of the first and second electrode lines may be configured differently, and may be configured the same for process and uniformity.

In addition, the difference between the shortest gaps g1 and g2 between the first and second electrode lines and the horizontal partition wall 810 may be equal to the width of the first electrode line 610. That is, g2 and g1 may differ by the width of the first electrode line.

As the shortest distance d3 between the first electrode and the second electrode is narrower, the discharge start voltage may be lowered, but the visible light may be shielded or the aperture ratio may be lowered due to the electrodes, thereby deteriorating luminance characteristics at the center of the discharge cell. Therefore, the intervals of the electrodes are preferably set at predetermined intervals.

On the other hand, as the shortest distance d3 between the first electrode and the second electrode increases, the discharge start voltage increases.

In addition, if d3 is less than 63 µm, there is a problem in that power consumption due to an increase in current is increased, and if it exceeds 77 µm, there is a problem in that the discharge start voltage is increased. Thus, the shortest distance between the first electrode and the second electrode is As for (d3), it is more preferable that it is 63-77 micrometers.

As a result, the distance between the electrodes is adjusted in consideration of the visible light shielding in the center of the discharge cell, the visible light shielding in the vicinity of the partition wall where the phosphor in the discharge cell is thickly applied, the discharge start voltage and the like. Since discharge is initiated even at a low discharge start voltage between protruding electrodes formed close to each other, the discharge start voltage of the plasma display panel can be lowered.

7 is a cross-sectional view illustrating an electrode structure formed on an upper substrate of a plasma display panel according to an exemplary embodiment of the present invention. Descriptions duplicated with those described with reference to FIG. 6 will be replaced with the above description.

6, the first electrode line 611 is formed to gradually increase in distance from the horizontal partition wall 810 at least in part.

The first electrode line 611 may be formed in at least a portion such that the interval with the horizontal partition wall 810 is changed gradually, as shown in FIG. 7, in the form of an angled inclination or a curved shape such as a circle or an ellipse.

In common with FIG. 6, not only is the area occupied by the electrode at the center of the discharge cell reduced, but also by removing some edge portions, the area of the first electrode line 611 itself is also reduced than in the case of FIG. 6, so that the aperture ratio is further increased. can do.

8 is a cross-sectional view illustrating an electrode structure formed on an upper substrate of a plasma display panel according to an exemplary embodiment of the present invention. Descriptions duplicated with those described with reference to FIG. 6 will be replaced with the above description.

The difference from the embodiment of FIG. 6 is that the second electrode line 621 formed with two or more inclinations does not extend across the discharge cell.

In the electrode structure of FIG. 6, all of the electrode lines extend to the other cell in the horizontal direction, but in the electrode structure of FIG. 8, the second electrode line 621 is smaller than the width of one discharge cell and does not extend to another adjacent discharge cell. Not only can the aperture ratio be secured, the first and second electrode lines and the connection electrode can diffuse the discharge generated at the center of the discharge cell to the left and right partition walls, and also to the upper and lower discharge cells without loss of the left and right partition walls.

9 is a cross-sectional view illustrating an electrode structure formed on an upper substrate of a plasma display panel according to an exemplary embodiment of the present invention. Descriptions duplicated with those described with reference to FIG. 6 will be replaced with the above description.

The difference from the embodiment of FIG. 6 is that the first electrode line 612 formed with two or more inclinations has a triangular shape.

At least a portion of the first electrode line 612 is formed such that the distance from the horizontal partition wall 810 gradually increases from side to side.

The portion corresponding to the wide bottom of the triangular shape of the first electrode line 612 is open toward the center of the discharge cell, thereby increasing the distance d2 of the other sustain electrode at the center of the discharge cell.

However, since the discharge start voltage is increased when the distance from the other sustain electrode is increased, it may include at least one third protruding electrode 631 protruding vertically from the first electrode line 612. As the third protruding electrode 631 is formed toward the center of the discharge cell, the shortest distance d3 between the first electrode and the second electrode can be reduced and the discharge start voltage can be lowered.

As described above, the plasma display device according to the present invention can improve the light emission efficiency of the plasma display panel as a whole by improving the aperture ratio. Accordingly, the ITO transparent electrode can be removed without reducing the luminance of the plasma display panel.

Although the preferred embodiments of the present invention have been described in detail above, those of ordinary skill in the art to which the present invention pertains can make various changes without departing from the spirit of the present invention as defined in the appended claims. It will be appreciated that the present invention may be modified or modified as described above. Accordingly, modifications of the embodiments of the present invention will not depart from the scope 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 cross-sectional view of an embodiment of an electrode structure formed on an upper substrate of a plasma display panel.

       6 to 9 are cross-sectional views illustrating an electrode structure formed on an upper substrate of a plasma display panel according to an embodiment of the present invention.

Claims (11)

Upper substrate; First and second electrodes formed on the upper substrate; A lower substrate disposed to face the upper substrate; A third electrode formed on the lower substrate; And a horizontal partition wall formed on the lower substrate in a direction crossing the third electrode. At least one of the first and second electrodes Formed of a single layer, And a first electrode line overlapping at least a portion of the third electrode and having at least two inclinations; and a second electrode line connected to the first electrode line and formed in a direction crossing the third electrode. , And the shortest gap between the first and second electrode lines and the horizontal partition wall is different from each other. The method of claim 1, And the shortest gap between the first electrode line and the horizontal partition wall is smaller than the shortest gap between the second electrode line and the horizontal partition wall. The method of claim 1, And at least one first protruding electrode protruding from the first electrode line in a direction parallel to the third electrode. The method of claim 1, A third electrode line formed closer to the horizontal partition wall than the first electrode line in a direction parallel to the horizontal partition wall; and a connection electrode connecting the third electrode line and the first electrode line; Plasma display device, characterized in that. The method of claim 4, wherein The connection electrode is formed in parallel with the third electrode, the plasma display device, characterized in that overlapping with the third electrode. The method of claim 4, wherein And at least one second protruding electrode protruding from the third electrode line toward the horizontal partition wall. The method of claim 1, And at least a portion of the first electrode line is formed such that a distance from the horizontal partition wall is gradually increased. The method of claim 1, And the widths of the first and second electrode lines are the same. The method of claim 1, And a difference in the shortest distance between the first and second electrode lines and the horizontal partition wall is equal to a width of the first electrode line. The method of claim 1, And the shortest distance between the first electrode and the second electrode is 63 to 77 μm. The method of claim 1, And at least one third protruding electrode vertically protruding from the first electrode line.

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