KR100344798B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel, and an object of the present invention is to provide a plasma display panel with improved white image quality, and a conventional plasma display panel has a problem in that white purity is lowered due to a luminance difference between red, green, and blue. Plasma display panel is a plurality of partitions are formed continuously on a predetermined substrate at regular intervals to form a discharge cell, and are formed continuously to be orthogonal to the partition wall and formed with a first width in the discharge cells to implement red color among the discharge cells. The discharge cell to implement green has a second width, and the discharge cell to implement blue has a plurality of first sustain electrodes formed of a third width, and is parallel to the first sustain electrode and paired with one of the plurality of first sustain electrodes. A plurality of second sustain electrodes which are erased to form a pair of sustain discharges In addition, the electrode spacing between the first sustain electrode and the second sustain electrode to perform the sustain discharge in a pair is the same in all the discharge cells to implement the red, green and blue, the luminance difference between red, green and blue is eliminated Thus, the white purity is higher than that of the conventional plasma display panel.

Description

Plasma Display Panel

The present invention relates to a plasma display panel.

Plasma display panels and liquid crystal displays (LCDs) are spotlighted as next generation display devices with the highest practicality among flat panel display devices. In particular, the plasma display panel has a higher luminance and wider viewing angle than a liquid crystal display device, and thus has wide applicability as a large, thin display such as an outdoor advertising tower, a wall display TV, or a theater display.

In the typical three-electrode surface discharge plasma display panel, as shown in FIG. 1A, the upper substrate 10 and the lower substrate 20 installed to face each other are bonded to each other. FIG. 1B illustrates a cross-sectional structure of the plasma display panel illustrated in FIG. 1A, and the lower substrate 20 is rotated by 90 ° for convenience of description.

The upper substrate 10 is a dielectric layer for coating the scan electrodes 16 and 16 'and the sustain electrodes 17 and 17' formed in parallel with each other, and the scan electrodes 16 and 16 'and the sustain electrodes 17 and 17'. And a protective film 12, wherein the lower substrate 20 is formed between the address electrode 22 and the dielectric film 21 formed on the entire surface of the substrate including the address electrode 22, and the address electrode 22. As shown in FIG. A partition 23 formed on the dielectric film 21 of the dielectric film 21, and a phosphor 23 formed on the surface of the partition wall 23 and the dielectric film 21 in each discharge cell. The upper substrate 10 and the lower substrate 20 The space between) is filled with an inert gas such as helium (He), xenon (Xe), etc. at a pressure of about 400 to 500 Torr to form a discharge region.

The scan electrodes 16 and 16 'and the sustain electrodes 17 and 17' are made of transparent electrodes 16 and 17 and a metal bus as shown in FIGS. 2A and 2B to increase light transmittance of each discharge cell. It consists of electrodes 16 'and 17'. FIG. 2A is a plan view of the sustain electrodes 17 and 17 'and the scan electrodes 16 and 16', and FIG. 2B is a sectional view of the sustain electrodes 17 and 17 'and the scan electrodes 16 and 16'. The bus electrodes 16 'and 17' receive a discharge voltage from an external driving IC, and the transparent electrodes 16 and 17 receive a discharge voltage applied to the bus electrodes 16 'and 17' and are adjacent to each other. It causes discharge between (16, 17). The overall width of the transparent electrodes 16 and 17 is about 300 micrometers (µm) indium oxide or tin oxide, and the bus electrodes 16 'and 17' are made of chromium (Cr) -copper (Cu) -chromium. It consists of three thin films comprised of (Cr). At this time, the width of the bus electrode 16 ', 17' lines is set to approximately one third the width of the transparent electrode 16, 17 line.

The operation of the three-electrode surface discharge type AC plasma display panel is the same as that shown in FIGS. 3A to 3D.

First, when a driving voltage is applied between the address electrode and the scan electrode, a counter discharge occurs between the address electrode and the scan electrode as shown in FIG. 3A, and the ions ionized in the inert gas in the discharge cell or quasi-excitation are caused by the counter discharge. Some of the atoms in the state impinge on the protective layer surface as shown in FIG. 3B. Due to the collision of electrons, electrons are secondarily emitted from the surface of the protective layer. The secondary electrons collide with the gas in the plasma state to diffuse the discharge. After the opposite discharge between the address electrode and the scan electrode is finished, opposite charge wall charges are generated on the surface of the protective layer on each address electrode and the scan electrode as shown in FIG. 3C.

When the discharge voltages having opposite polarities are continuously applied to the scan electrode and the sustain electrode, and the driving voltage applied to the address electrode is blocked at the same time, the potential difference between the scan electrode and the sustain electrode as shown in FIG. Surface discharge occurs in the discharge region on the surface of the dielectric layer and the protective layer. Due to the opposite discharge and the surface discharge, electrons present in the discharge cell collide with the inert gas inside the discharge cell. As a result, ultraviolet rays having a wavelength of 147 nm are generated in the discharge cells while the inert gas of the discharge cells is excited. The ultraviolet rays collide with the phosphor surrounding the address electrode and the partition wall to operate the plasma display panel.

At this time, the luminance of the plasma display is proportional to the discharge current flowing between the scan electrode and the sustain electrode. Therefore, when the discharge current is large, the screen of the plasma display panel becomes bright. In addition, as the distance between the scan electrode and the sustain electrode increases, the brightness of the discharge cell is improved. This is because the discharge distance between the electrodes is increased to generate ultraviolet rays in the positive column.

In addition, a color of a white color screen implemented by a plasma display panel is determined by a luminance ratio between a red discharge cell, a green discharge cell, and a blue discharge cell. At this time, the image quality of the white screen is realistically felt as the color temperature is higher.

The luminance ratio of the phosphor formed in the discharge cells of a plasma display panel generally used has a value of about 2: 3: 1 in the order of red, green, and blue. Therefore, when all the discharge cells are discharged to show white, pure white does not appear well. And the color temperature at this time is about 5000 degree | times.

However, the conventional plasma display panel has a problem in that the image quality of the white color is not good because the luminance ratio between the discharge cell in which the red phosphor is formed, the discharge cell in which the blue phosphor is formed, and the discharge cell in which the green phosphor is formed are different.

The present invention is to solve the above problems, and has a higher luminous brightness and luminous efficiency than the conventional plasma display panel, and to provide a plasma display panel with improved white image quality by adjusting the luminance ratio between each discharge cell to the same level Has its purpose.

1A is a perspective view illustrating a structure of a general plasma display panel.

1B is a cross-sectional view showing the structure of the plasma display panel shown in FIG. 1A.

Figure 2a is a plan view showing the structure of the sustain electrode provided on the upper substrate.

Figure 2b is a cross-sectional view showing the structure of the sustain electrode provided on the upper substrate.

3A to 3D show the operation of the discharge cells in the write discharge section.

4 is a view schematically showing the structure of a plasma display panel according to the present invention;

Fig. 5 shows a first embodiment of the plasma display panel according to the present invention.

6 shows a second embodiment of a plasma display panel according to the present invention;

Fig. 7 shows a modified example of the second embodiment of the plasma display panel according to the present invention.

Symbol description for main parts of drawing

100: upper substrate 110: dielectric layer

120: protective film 131: first sustain electrode

131: second sustain electrode 200: lower substrate

210: bulkhead (main bulkhead) 220: sub bulkhead

A1, A2, A3, A4, A5, A6, A7, A8, A9 ...: address electrode

Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9 ...: first sustain electrode

Z1, Z2, Z3, Z4, Z5, Z6, Z7, Z8, Z9 ...: second sustain electrode

R: discharge cell to implement red G: discharge cell to implement green

B: discharge cell to realize blue color

The present invention is characterized in that a part of the sustain electrodes provided in the plasma display panel are formed in different widths for each discharge cell in which different phosphors are formed.

The plasma display panel according to the present invention includes a plurality of partition walls which are continuously formed at regular intervals to form discharge cells, and discharge cells that are formed to be orthogonal to the partition walls and have a first width in a discharge cell to implement red color, A plurality of first sustain electrodes having a third width and a plurality of first sustain electrodes formed with a third width and parallel to the first sustain electrode and paired with one first sustain electrode are formed in a discharge cell to have a second width and implement blue color. The electrode spacing between the first sustaining electrode and the second sustaining electrode including two second sustaining electrodes and performing a pair of sustain discharges is the same in all of the discharge cells to implement red, green, and blue. 4 is a perspective view schematically showing a plasma display panel of the present invention, Figure 5 is a plan view showing a plasma display panel of the present invention provided with a grid-shaped partition wall.

The partition walls 210 are continuously formed at predetermined intervals on a predetermined substrate. A discharge cell is formed in an area between the partition walls 210, and the discharge cell includes a pair of sustain electrodes in which the first sustain electrode and the second sustain electrode are paired one by one. In addition, the partition wall 210 may be formed in a stripe (stripe) shape, but may be formed in a lattice shape so as to distinguish regions for each discharge cell.

In addition to the stripe-shaped main bulkhead, the lattice-shaped partition wall includes a sub-border wall 220 continuously formed in a direction orthogonal to the main bulkhead so as to pair and distinguish the first sustain electrode 131 and the second sustain electrode 132 in pairs. It is further configured to include.

In general, the partition wall 210 is formed on the lower substrate 200, and the sustain electrodes are formed on the upper substrate 100. The plasma display panel according to the present invention may further include a dielectric layer 110 and a passivation layer 120 on the sustain electrode as in the related art.

The first sustain electrodes 131 and the second sustain electrodes 132 are formed to be perpendicular to the stripe-shaped partition wall 210. In particular, each of the first sustain electrodes 131 may have a portion having a first width in a discharge cell to implement red, and a portion located in a discharge cell to implement green with a second width. The portion located in the discharge cell to implement blue color is formed in the third width. At this time, the portion formed in the first width is preferably formed to have a range of 70 to 90% of the portion formed in the second width, the third width is preferably formed to have the same size as the second width.

In addition, the second sustain electrode 132 is preferably formed in the same shape as the first sustain electrode 131. That is, in the second sustain electrode 132, a portion of the discharge cells positioned in the discharge cells to realize red color is formed in the fourth width, and a portion of the discharge cells to implement green color is formed in the fifth width and blue color is formed in the discharge cells. The portion located in the discharge cell is formed in the sixth width. In this case, the second sustain electrodes 132 may have the same width as the fourth width, the first width, the fifth width and the second width, and the sixth width may be the same as the third width. The electrode spacing between 131 and the second sustain electrode 132 is the same in all of the discharge cells to implement red, green, and blue.

The plasma display panel according to the present invention is configured such that the sustain electrodes have differential widths depending on the phosphors of the discharge cells. In particular, since the width of the sustain electrode portion located in the discharge cell to implement red is narrower than other portions, the light emission luminance of the discharge cell to implement red is suppressed. Therefore, since the luminance of the red phosphor, which is higher than the luminance of the blue phosphor and the green phosphor that emits light under the same discharge voltage, is lowered, the luminance difference between blue, green, and red is reduced, so that the purity of white can be further increased.

The plasma display panel of the present invention can be implemented in various embodiments according to the arrangement relationship of the sustain electrodes.

(First embodiment)

In the first embodiment, the first sustain electrode 131 and the second sustain electrode 132 are alternately installed.

If the first sustain electrode 131 receives the scan pulse and the second sustain electrode 132 receives only the sustain pulse, the plasma display panel according to the first embodiment of the present invention may be formed of the first sustain electrode 131 and the first sustain electrode 131. 2 sustain electrodes 132 are alternately installed as shown in FIG.

At this time, the structure of the partition wall 210 for dividing the pixel may be formed of a stripe (stripe) structure that is commonly used, but may also have a lattice structure as shown in FIG.

As described above, the lattice-shaped partition wall is a sub-barrier formed continuously in a direction orthogonal to the main partition wall so as to pair and distinguish the first sustain electrode 131 and the second sustain electrode 132 in pairs in addition to the stripe-shaped main partition wall ( And additionally 220).

(Second embodiment)

The plasma display panel of the second embodiment is characterized in that a pair of first sustain electrodes 131 are paired and a pair of second sustain electrodes 132 are paired. That is, in the plasma display panel of the first embodiment, the first sustain electrode 131 and the second sustain electrode 132 are alternately formed, whereas the plasma display panel of the second embodiment has a pair of discharge cells formed in one discharge cell. The positions of the sustain electrodes are alternately changed.

If the first sustain electrode 131 receives the scan pulse and the second sustain electrode 132 receives only the sustain pulse, the plasma display panel according to the first embodiment of the present invention may be formed of the first sustain electrode 131 and the first sustain electrode 131. 2 sustain electrodes 132 are provided so as to be adjacent to each other as shown in FIG. As a result, if a pair of sustain electrodes provided in one discharge cell is provided in the order of the first sustain electrode 131 and the second sustain electrode 132, the pair of sustain electrodes provided in the other adjacent discharge cells is the second sustain. The electrode 132 and the first sustain electrode 131 are provided in this order.

However, in the plasma display panel of the present invention, another sustain electrode, that is, the first sustain electrode is closer than the distance between the pair of first sustain electrodes 131 or the distance between the pair of second sustain electrodes 132. The distance between 131 and the second sustain electrode 132 is made closer.

The partition wall 210 is formed such that a pair of the first sustaining electrode 131 or the second sustaining electrode 132 is formed in a pair. Accordingly, the first sustaining electrode 131 and the second sustaining electrode 132 are formed by the partition wall 210 to form a discharge cell. In this case, the structure of the partition wall 210 for dividing the pixels may be formed of a stripe (stripe) structure that is generally used, but may also have a lattice structure as shown in FIG. 7.

In addition to the stripe-shaped main bulkhead, the lattice-shaped partition wall includes a sub-border wall 220 continuously formed in a direction orthogonal to the main bulkhead so as to pair and distinguish the first sustain electrode 131 and the second sustain electrode 132 in pairs. It is further configured to include.

Compared to the conventional plasma display panel, the plasma display panel according to the present invention has the effect of eliminating the luminance imbalance between the discharge cell implementing the red color, the discharge cell implementing the green color, and the discharge cell implementing the blue color. That is, the plasma display panel of the present invention has the effect that the luminance difference between red, green, and blue is eliminated, so that the purity of white is higher than that of the conventional plasma display panel.

Claims (10)

A plurality of partition walls continuously formed at predetermined intervals on a predetermined substrate to form a discharge cell; A plurality of discharge cells are formed to be orthogonal to the partition wall, are formed to have a first width in discharge cells to implement red among the discharge cells, are formed to have a second width in discharge cells to implement green, and are formed to have a third width in discharge cells to implement blue. First sustain electrodes, and A first sustain electrode parallel to the first sustain electrode and paired with one of the plurality of first sustain electrodes to form a pair of second sustain electrodes to perform sustain discharge; and a pair of first sustain electrodes to perform sustain discharge And an electrode gap between the electrode and the second sustain electrode is the same in all of the discharge cells to implement red, green, and blue. The plasma display panel of claim 1, wherein the first width is configured to have a range of 70 to 90% of the second width. The plasma display panel of claim 1, wherein the third width is the same as the second width. The discharge cell of claim 1, wherein the second sustain electrode has a fourth width in a discharge cell to implement red, a fifth width in a discharge cell to implement green, and a sixth width in a discharge cell to implement blue. Plasma display panel. 5. The plasma display panel of claim 4, wherein the fourth width is the same as the first width. The plasma display panel of claim 4, wherein the fifth width is the same as the second width. The plasma display panel of claim 4, wherein the sixth width is the same as the third width. The plasma display panel of claim 1, wherein the first sustain electrode and the second sustain electrode are alternately disposed. The plasma display panel of claim 1, wherein the pair of first sustain electrodes is adjacent to each other, and the pair of second sustain electrodes is adjacent to each other. 10. The plasma display panel of claim 8 or 9, further comprising a sub-barrier formed continuously in a direction orthogonal to the partition wall so as to distinguish the first and second sustain electrodes in pairs.