KR20070073353A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to prevent mixture of different colors of phosphors between channels and to suppress the generation of crosstalk by forming a first and a second channels having different widths on barrier ribs. A rear substrate(211) is disposed at a position facing a front substrate(201). A plurality of barrier ribs(212) are formed between the front substrate and the rear substrate in order to define a plurality of discharge cells. A first channel(C1) having a predetermined width is formed at a first position of the barrier ribs. A second channel(C2) having a width different from the second channel is formed at a second position of the barrier ribs.

Description

Plasma Display Panel

1A to 1B illustrate the structure of a channel formed in a conventional plasma display panel.

2 is a view for explaining an example of a plasma display panel according to the present invention;

3 is a view showing a channel structure on a partition wall for partitioning discharge cells of a plasma display panel according to the present invention;

4 illustrates various structures of channels formed on a plasma display panel of the present invention.

***** Explanation of symbols for the main parts of the drawing *****

201: front substrate 211: rear substrate

212 bulkhead 214 phosphor

215: lower dielectric layer 216: red discharge cell

217: green discharge cell 218: blue discharge cell

C1: first channel C2: second channel

The present invention relates to a display panel, and more particularly to a plasma display panel.

In today's rapidly changing information society, display panels are becoming more important as visual information transmission media. In order to gain a major position in the future, display panels must satisfy requirements such as low power consumption, light weight, and high quality.

Such display panels satisfying such characteristics include a cathode ray tube (CRT), an electroluminescence (EL), a light emitting diode (LED), a vacuum fluorescence display (VFD), A field emission display (FED), a plasma display panel (PDP), a liquid crystal display (LCD), and the like.

Among these various display panels, the plasma display panel is a partition wall formed between the front substrate and the rear substrate and forms one unit cell. Each cell includes neon, helium, or neon and helium. A main discharge gas such as a mixed gas (Ne + He) and an inert gas containing a small amount of xenon are 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 plasma display panels are not only easy to thin and large in size, but also greatly improved as a result of recent technology developments, and thus are attracting attention as next generation display devices.

Plasma display panel has a problem that the phosphor is mixed with each other on the channel due to the channel structure formed on the partition wall partitioning a plurality of discharge cells, the mixed color occurs. .

1 illustrates a structure of a channel formed in a conventional plasma display panel.

Referring to FIG. 1A, a horizontal partition 104a and a vertical partition partitioning a plurality of discharge cells 111, 112, and 113 between a front substrate 101 and a rear substrate 102 in a conventional plasma display panel. The channel 105 is formed in the traveling direction of the horizontal partition wall 104a among the 104b, and is formed at the point where two discharge cells face each other.

Here, the width of the channel 105 is formed in the advancing direction of the horizontal partition wall 104a by D1. When phosphor is printed on a printing surface including a channel 105 and a plurality of discharge cells 111, 112, and 113 designed to improve exhaustability on a plasma display panel, a red (R :) phosphor and a green ( When the G: Green phosphor and the blue (B: Blue) phosphor are formed to be easily seen in cross-sectional view, they will be described with reference to FIG. 1 (b).

Referring to FIG. 1B, the phosphor in the advancing direction of the vertical partition wall 104b intersecting with the channel 105 formed between the horizontal partition walls 104a partitioning the plurality of discharge cells 103 on the plasma display panel. Is printed, and the red (R) phosphor is applied to the channel 105 formed between the red discharge cells 111 of the red (R) discharge cell 111 line in the advancing direction of the vertical partition wall 104b which divides the discharge cells. And a green (G) phosphor is applied to the channel 105 formed between the green discharge cells 112 of the green discharge cell 112 line, and formed between the blue discharge cells 113 of the blue discharge cell 113 line. Blue phosphor is applied to the channel 105. Here, since the channel 105 has a constant width as long as D1, phosphors of various colors R, G, and B are mixed.

Accordingly, a phenomenon in which an image appears to be partially blurred on the display surface displayed on the plasma display panel appears, and as a result, the image quality on the panel to be implemented is degraded. In addition, there is a problem that cross talk occurs when the panel is driven.

In order to solve this problem, an object of the present invention is to prevent the mixing of phosphors by changing the structure of the channel on the partition wall of the plasma display panel.

The present invention for achieving the above object includes a rear substrate disposed in a position facing the front substrate and a partition partitioning a plurality of discharge cells between the front substrate and the rear substrate, a predetermined width at the first point of the partition wall And a first channel having a second channel, and a second channel having a width different from that of the first channel is formed at a second point different from the first point.

In addition, the second point is a point where two discharge cells face each other, and the first point is a point where boundary portions of the two discharge cells face each other.

Also, the width of the second channel at the second point is wider than the width of the first channel at the first point.

In addition, the width of the first channel is characterized in that more than 0.2 times less than 1 times the width of the second channel.

Hereinafter, a plasma display panel of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view for explaining an example of the plasma display panel according to the present invention.

Referring to FIG. 2, the plasma display panel of the present invention has a display surface on which an image is displayed on the front panel 200 and the back panel 200 having the scan electrodes 202 and Y and the sustain electrodes 203 and Z formed on the front substrate 201. The rear panel 210 having a plurality of address electrodes 213 and X arranged so as to intersect the aforementioned scan electrodes 202 and Y and the sustain electrodes 203 and Z on a rear substrate 211 formed at a predetermined distance. Put on and combined side by side.

The front panel 200 is made of scan electrodes 202 and Y and sustain electrodes 203 and Z, preferably transparent ITO material, for mutually discharging in the discharge space, ie, the discharge cell and maintaining light emission of the discharge cell. Scan electrodes 202 and Y and sustain electrodes 203 and Z including the formed transparent electrode a and a bus electrode b made of an opaque metal material are included in pairs. The scan electrodes 202 and Y and the sustain electrodes 203 and Z are covered by one or more upper dielectric layers 204 that limit the discharge current and insulate the electrode pairs, and discharge on top of the upper dielectric layers 204. In order to facilitate the condition, a protective layer 205 on which magnesium oxide (MgO) is deposited is formed.

The rear panel 210 includes a plurality of discharge spaces, that is, a closed type barrier rib 212 of a well type (or stripe type) for partitioning discharge cells. In addition, a plurality of address electrodes 213 and X are provided for supplying data pulses.

In the plurality of discharge cells 216, 217, and 218 partitioned by the partition 212, a phosphor layer 214 that emits visible light for image display upon address discharge, preferably red (R: R). A green (G) and blue (B) phosphor layer is formed.

Here, the second channel C2 formed at the point where two discharge cells face each other and the first channel C1 formed at the point where the boundary portions of the two discharge cells face each other on the partition wall 212. Include.

A lower dielectric layer 215 is formed between the address electrodes 213 and X and the phosphor layer 214.

In FIG. 2, only one example of the plasma display panel of the present invention is shown and described, and the present invention is not limited to the plasma display panel having the structure of FIG. For example, although the plasma display panel 200 of FIG. 2 shows scan electrodes 202 and Y, sustain electrodes 203 and Z, and address electrodes 213 and X, the plasma display panel of the present invention is shown. In the panel, one or more of the scan electrodes 202 and Y, the sustain electrodes 203 and Z, and the address electrodes 213 and X may be omitted.

Incidentally, in FIG. 2, only the scan electrodes 202 and Y and the sustain electrodes 203 and Z described above are composed of the transparent electrodes 202a and 203a and the bus electrodes 202b and 203b, respectively. At least one of the scan electrodes 202 and Y and the sustain electrodes 203 and Z may consist of only the transparent electrodes 202a and 203a.

In addition, in FIG. 1, only the case where the partition 212 for partitioning the discharge cell is formed on the rear substrate 211 is illustrated, but the partition 212 may be formed on the front substrate 201. Alternatively, the front substrate 201 and the rear substrate 212 may be formed respectively. That is, the partition 212 for partitioning the discharge cells in the plasma display panel of the present invention is disposed between the front substrate 201 and the rear substrate 211.

The following relates to a channel formed in the partition wall 212 between the red discharge cell 216 and the red discharge cell 216 formed between the front substrate 201 and the back plate 211 of the plasma display panel P2 of FIG. 2. . This will be described in more detail with reference to FIG. 3.

3 is a view showing a channel structure on a partition wall for partitioning a discharge cell of the plasma display panel according to the present invention.

Referring to FIG. 3A, a first channel C1 having a predetermined width is formed on a partition 212 at a first point, and the first channel C1 is formed at a second point different from the first point. The second channel C2 having a different width from the second channel C2 is formed. The second channel C2 is formed at the point where the two discharge cells face each other, and the first channel C1 is formed at the point where the boundary portions of the two discharge cells face each other.

Here, the point where the boundary portions of the two discharge cells, which are the first point, face each other refers to a point facing between the vertical partition walls 212b of the horizontal partition walls 212a and the vertical partition walls 212b of the discharge cells, The point where the two discharge cells face each other is a point facing each other between the horizontal partition walls 212a and the vertical partition walls 212b of the discharge cells.

More specifically, the width L2 of the second channel C2 at the second point is formed wider than the width L1 of the first channel C1 at the first point. More preferably, the width L1 of the first channel C1 is preferably formed such that the width L2 of the second channel C2 is 0.2 times or more and less than 1 time. The reason for having such a threshold range is as follows.

The width L1 of the first channel C1 formed on the partition 212 partitioning the plurality of discharge cells 216, 217, 218 in the plasma display panel is less than 0.2 times the width L2 of the second channel C2. In this case, since the width L1 of the first channel is significantly narrower than the width L2 of the second channel, the mixing of different phosphors can be prevented, whereas the first channel C1 and the second channel C2 are prevented. Exhaust characteristics are not good. As a result, the capacitance C of the entire panel increases, and as the magnitude of the discharge current increases, power consumption increases and efficiency decreases.

In contrast, when the width L1 of the first channel C1 is greater than one times the width L2 of the second channel C2, the width L1 of the first channel is the width L2 of the second channel. As it grows larger, different phosphors mix. In addition, since the separation distance between the vertical partitions 212b defining the plurality of discharge cells 216, 217, and 218 becomes narrow, the second channel C2 has He + Xe for discharging in the discharge space of the discharge cells. Inert mixed gas such as Ne + Xe may leak ultraviolet rays and visible light generated by the discharge to the adjacent discharge cells.

This problem is that the direction in which the phosphor is applied is a direction in which the vertical partition walls 212b of the horizontal partition walls 212a and the vertical partition walls 212b partition the plurality of discharge cells 216, 217, and 218.

3B illustrates a red color in the first channel C1 and the second channel C2 during the coating process of the phosphor 214 in the advancing direction of the vertical partition wall 212b that partitions the discharge cell according to the present invention. This is for explaining the effect of preventing the phosphor from rotting between the phosphors 214 of R, green (G) and blue (B).

Red (R) discharge cells 216, green (G) discharge cells 217, and blue (B) discharge cells 218 are sequentially arranged side by side on the plasma display panel. Red (R), green (G), and blue (B) phosphors are applied in a direction crossing the array directions of the plurality of discharge cells 216, 217, 218.

Red (R) in the second channel (C ₂ R) formed between the red (R) discharge cells 216 of the red (R) discharge cell 216 line in the traveling direction of the vertical partition 212b partitioning the discharge cells. A phosphor is applied, and a green (G) phosphor is applied to the second channel (C ₂ G) formed between the green (G) discharge cells 217 of the green (G) discharge cell 217 line, and blue (B). The blue (B) phosphor is applied to the second channel C ₂ B formed between the blue (B) discharge cells 218 of the discharge cell 218 line.

Here, the first channel C1 is formed at a point where the boundary portions of the two discharge cells face each other, that is, a point facing between the vertical partition walls 212b of the discharge cell. More specifically, the first channel C ₁ a is formed at a point where the vertical partition 212b of the red (R) discharge cell 216 and the vertical partition 212b of the green (G) discharge cell 217 face each other. The first channel C ₁ b is formed at the point where the vertical partition 212b of the green (G) discharge cell 217 and the vertical partition 212b of the blue (B) discharge cell 218 face each other.

Since the width L1 of the first channel C1 is smaller than the width L2 of the second channel C2, the width L1 and the second width of the first channel C1 are eventually reduced. By varying the width L2 of the channel C2, it is possible to prevent the phosphors having different light emitting components from mixing.

Accordingly, the image of the image may be partially blurred on the display surface displayed on the plasma display panel due to the mixing of the phosphors, thereby improving the image quality of the implemented image and suppressing the generation of crosstalk when the panel is driven.

4 illustrates various structures of channels formed on the plasma display panel of the present invention.

Referring to FIG. 4A, a first channel C1 and a second channel C2 are formed on partition walls 212 partitioning each of the plurality of discharge cells 216, 217, and 218 formed in the plasma display panel. . Here, the second channel C2 is formed in a rectangular shape and has a width as large as L3 at the point where two discharge cells face each other. In addition, the first channel C1 has a width equal to L4 between a point where the boundary portions of the two discharge cells face each other, that is, between the vertical partition walls 212b of the two discharge cells.

Referring to (b) of Figure 4, the second channel (C2) is formed in an elliptical shape, and also has a width as much as L5 at the point where the two discharge cells facing. In addition, the first channel C1 has a width equal to L6 between a point where the boundary portions of the two discharge cells face each other, that is, between the vertical partition walls 212b of the two discharge cells.

Referring to FIG. 4C, the second channel C2 has a rhombus shape and has a width as large as L7 at the point where the boundary portions of the two discharge cells face each other. In addition, the first channel C1 has a width equal to L8 between a point where the boundary portions of the two discharge cells face each other, that is, between the vertical partition walls 212b of the two discharge cells.

In addition to the additional description, an example in which the concept is actually implemented is illustrated in FIG. 3. 4 (a) to 4 (c), only the structure of the second channel C2 is substantially different from that of FIG. 3 (a).

As described above, it will be understood by those skilled in the art that the technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the plasma display panel of the present invention prevents the phosphors having different colors from being mixed between the channels by varying the width of the first channel and the width of the second channel formed on the partition wall partitioning the plurality of discharge cells. In addition, there is an effect of suppressing generation of crosstalk during driving of the panel.

In addition, there is an effect of improving the image quality of the implemented image by preventing the phenomenon that the image is partially blurred on the display surface displayed on the panel due to the mixed color of the phosphor.

Claims (4)

Front substrate; A rear substrate disposed at a position facing the front substrate; And A partition wall partitioning a plurality of discharge cells between the front substrate and the rear substrate; A first channel having a predetermined width is formed at a first point of the barrier rib, and a second channel having a width different from the first channel is formed at a second point different from the first point. . The method of claim 1, The second point is a point where two discharge cells face each other, And the first point is a point where the boundary portions of two discharge cells face each other. The method of claim 2, And the width of the second channel at the second point is wider than the width of the first channel at the first point. The method of claim 3, wherein The width of the first channel is a plasma display panel, characterized in that more than 0.2 times less than 1 times the width of the second channel.

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