KR100615310B1 - Plasma display panel - Google Patents

Abstract

An object of the present invention is to provide a plasma display panel having a new structure. To achieve the above object, the present invention provides a first substrate having a first partition wall for partitioning a plurality of discharge cells, and the first substrate. A second substrate disposed to face each other, the second substrate including a second partition portion that partitions the discharge cells together with the first partition portion, a plurality of pairs of first and second discharge electrodes that cause discharge in the discharge cells; At least one light absorbing material interposed between the first substrate and the second substrate and including a material absorbing visible light incident from the outside, phosphor layers disposed in the discharge cells, and in the discharge cells. Provided is a plasma display panel having a discharge gas disposed therein.

Description

Plasma Display Panel {Plasma display panel}

1 is an exploded perspective view showing a conventional plasma display panel.

2 is an exploded perspective view showing a plasma display panel according to a first embodiment of the present invention.

3 is a cross-sectional view taken along line III-III of FIG. 2.

4 is a layout view illustrating the discharge cells and the electrodes illustrated in FIG. 2.

5 is an exploded perspective view showing a plasma display panel according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5.

FIG. 7 is a layout view illustrating discharge cells and electrodes illustrated in FIG. 5.

Explanation of symbols on the main parts of the drawings

200, 300: plasma display panel

210, 310: first substrate 220, 320: second substrate

213 and 313: first discharge electrode 223 and 323: second discharge electrode

215, 315: first phosphor layer 224, 324: second phosphor layer

216, 316: first protective layer 226, 326: second protective layer

217, 317: first light absorbing material 227, 327: second light absorbing material

230, 330: discharge cells 240, 340: dielectric layer

319: address electrode

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

Plasma display panels have large screens, high quality, ultra-thin, light weight, and wide viewing angles, and they are in the spotlight as the next-generation large flat panel display panels because they are simpler to manufacture and easier to manufacture than other flat panel display devices.

In the general three-electrode surface discharge plasma display panel 100 shown in FIG. 1, visible light emitted from the phosphor layer 110 is formed on the sustain electrodes 106 and 107 disposed on the lower surface of the first substrate 101. In addition, the first dielectric layer 109 covering the electrodes 106 and 107 and the MgO film 111 absorb a substantial portion (approximately 40%), thereby causing a problem of low luminous efficiency. In addition, when the conventional three-electrode surface discharge plasma display panel 100 displays the same image for a long time, the phosphor layer 110 may be permanently sputtered by ion sputtering by charged particles of discharge gas. There was a problem causing phosphorus afterimages.

In addition, since the address electrodes 117 and the second dielectric layer 113 are formed on the second substrate 115 and the partition wall 114 is formed separately on the second dielectric layer, the manufacturing process is complicated.

In order to solve the above problems, an object of the present invention is to provide a plasma display panel of a new structure.

In order to achieve the above object and other objects, the present invention is a first substrate having a first partition wall portion for partitioning a plurality of discharge cells, and disposed to face the first substrate, the first partition wall portion and A second substrate having second partition wall portions that partition the discharge cells together, a plurality of pairs of first and second discharge electrodes causing discharge in the discharge cells, and between the first substrate and the second substrate A plasma display panel having at least one light absorbing material interposed therebetween, the material absorbing visible light incident from the outside, a phosphor layer disposed in the discharge cells, and a discharge gas disposed in the discharge cells; To provide.

In the present invention, the light absorbing material is preferably interposed between the first partition portion and the second partition portion. In this case, first grooves extending around the discharge cells arranged in one direction may be formed in the first partition wall, and the light absorbing material may be disposed in the first grooves. In addition, the second partition wall portion is formed with second grooves extending to surround the discharge cells arranged in one direction, it is preferable that the light absorbing material is disposed in the second grooves.

(First embodiment)

A plasma display panel 200 according to a first embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4.

2 is an exploded perspective view of the plasma display panel 200 according to the second exemplary embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2. 4 is a layout view illustrating the discharge cells and the electrodes illustrated in FIG. 2.

The plasma display panel 200 according to the present invention includes the first substrate 210, the second substrate 220, the first discharge electrodes 213, the second discharge electrodes 223, and the first protective layer 216. , Second protective layers 226, first phosphor layers 215, second phosphor layers 225, first light absorbing materials 217, second light absorbing materials 227, dielectric layers 240, a discharge gas (not shown) is provided.

The first substrate 210 is usually made of a transparent material having excellent light transmittance mainly composed of glass, and generally, glass is preferably used. In addition, the second substrate 220 is spaced apart in parallel from the first substrate 210 at predetermined intervals, and is made of a material having excellent light transmittance such as glass.

In the present embodiment, visible light generated in the discharge cells 230 may be emitted to the outside through the first substrate 210 and / or the second substrate 220. In this case, the first substrate 210 and / or the second substrate 220 on which the visible light is projected may include the sustain electrodes 106 and 107 and the first electrodes existing on the first substrate 101 of the conventional plasma display panel. Since the dielectric layer 109 and the protective layer 111 do not exist, the front transmittance of visible light is remarkably improved. Therefore, when the image is implemented with the luminance of the conventional level, the first and second discharge electrodes 213 and 223 are driven at a relatively low voltage, thereby improving luminous efficiency.

The first substrate 210 includes a first substrate portion 211 and first partition walls 212. The first substrate portion 211 is in the shape of a flat glass plate, and the first partition portions 212 are disposed on the first substrate portion 211 facing the second substrate 220. The first partition walls 212 and the first substrate 211 are integrally formed. In FIG. 2, the first partition walls 212 partition the discharge cells 230 having a circular cross section, but the present invention is not limited thereto. As long as a plurality of discharge spaces may be formed, various patterns may be formed. Can be. For example, the cross section of the discharge cell as in the present embodiment may be formed to be a polygon such as a triangle, a quadrangle, a pentagon, or an ellipse in addition to the circular shape.

  The second substrate 220 includes a second substrate portion 221 and second partition walls 222. The second substrate portion 221 is in the shape of a flat glass plate, the second partition portions 221 are disposed on the second substrate portion 221 facing the first substrate 210, the second partition portion 222 ) And the second substrate portion 221 are integral. In FIG. 2, the second partition walls 222 are divided with the first partition walls 212 to divide the discharge cells 230 having a circular cross section, but the present invention is not limited thereto. As long as it can be formed, it can be various patterns. For example, the cross section of the discharge cell as in the present embodiment may be formed to be a polygon such as a triangle, a quadrangle, a pentagon, or an ellipse in addition to the circular shape. In addition, although the first partition portion 212 and the second partition portion 222 may have a different shape, it is preferable to have the same shape for uniformity of discharge and manufacturing convenience.

The first grooves 212a are formed on the first partition walls 212 facing the second partition walls 222 to a predetermined depth. The first grooves 212a are formed to extend while surrounding the discharge cells 230 arranged along one row. The first groove 212a has a shape surrounding each of the discharge cells 230 having a circular cross section in a circular shape, and the shape of the first grooves 212a is defined by the first discharge electrodes 213 of FIG. 4. Similar in shape. The first grooves 212a may be formed by various methods such as sandblasting, photoetching, or the like.

First light absorbing materials 217 are disposed in the first grooves 212a. The first light absorbing materials 217 include a material absorbing visible light incident from the outside. Therefore, after the visible light incident from the outside is reflected by the plasma display panel 200, the rate of exiting again to the outside is reduced. If the external light reflectance is large, glare or the like may occur to the user, so external light reflection is not preferable. However, in the present embodiment, since the first light absorbing materials 217 reduce the external light reflection, the overall clear room contrast is increased. In addition, since the first light absorbing materials 217 are also disposed in the first partition walls 212 where direct discharge does not occur, it is minimized to reduce the luminance of visible light generated in the discharge cells 230. The first light absorbing material 217 may be formed of various materials including the light absorbing material. Preferably, the first light absorbing material 217 is formed of a material having a visible light absorbance of 50% or more. The first light absorbing material 217 may be formed by mixing a dark pigment with a transparent dielectric such as PbO, B ₂ O ₃ , SiO _2, or the like.

The first discharge electrodes 213 are schematically illustrated in FIG. 4. The first discharge electrodes 213 are paired with the second discharge electrodes 214, and the first discharge electrodes 213 and the second discharge electrodes 214 generate a plasma discharge in the discharge cells 230. Do this. The first discharge electrodes 213 extend while surrounding the discharge cells 230 arranged along one row. The first discharge electrodes 213 are disposed in the first grooves 212a. Referring to FIGS. 2 and 3, the first light absorbing materials 217 and the first light absorbing materials 217 and the first grooves 212a are disposed in the first grooves 212a. The discharge electrodes 213 are sequentially arranged. However, the present invention is not limited thereto, and the first discharge electrodes 213 and the first light absorbing materials 217 may be disposed in the first grooves 212a. In the former case, since the first light absorbing materials 217 are disposed at a position closer to the outside, the reduction rate of the external light reflection is further increased.

Second grooves 222a are formed on the second partition walls 222 facing the first partition walls 212 at a predetermined depth. The second grooves 222a are formed to surround the discharge cells 230 in one row that cross the direction in which the first grooves 212a extend. The second grooves 222a have a shape that surrounds the discharge cells 230 having a circular cross section in a circular shape, and the shape of the second grooves 222a is the second discharge electrodes 223 shown in FIG. 4. Similar to The second grooves 222a may also be formed by various methods such as sandblasting and photoetching.

Second light absorbing materials 227 are disposed in the second grooves 222a. The second light absorbing materials 227 include a material absorbing visible light incident from the outside, and the same as the first light absorbing materials 217 described above, the overall light contrast is increased by reducing the external light reflection. In addition, since the second light absorbing materials 227 are also disposed in the second partition portions 222 where direct discharge does not occur, it is minimized to reduce the luminance of the visible light generated in the discharge cells 230. Since the material properties of the second light absorbing materials 227 are the same as those of the first light absorbing materials 217, they will be omitted here.

The second discharge electrodes 223 are schematically illustrated in FIG. 4. The second discharge electrodes 223 extend to cross the direction in which the first discharge electrodes 213 extend, and are disposed in the second grooves 222a. In addition, the second discharge electrodes 223 extend to surround the discharge cells 230 disposed along one row. In order to uniformize the discharge in the discharge cell 230, the annular shape of the first discharge electrode 213 and the second discharge electrode 223 is preferably formed to be symmetrical. 2 and 3, the second light absorbing materials 227 and the second discharge electrodes 223 are sequentially disposed in the second groove 222a, and the technical characteristics thereof are described above. Since the first light absorbing materials 217 and the first discharge electrodes 213 are the same, they are omitted here.

In the plasma display panel 200 according to the present invention, a two-electrode structure is formed. Accordingly, one of the first discharge electrode 223 and the second discharge electrode 223 functions as a scan and sustain electrode, and the other function as an addressing and sustain electrode.

Since the first discharge electrodes 213 and the second discharge electrodes 223 are not directly disposed at positions that reduce the visible light transmittance, they may be formed of a conductive metal such as aluminum or copper. Therefore, since the voltage drop in the longitudinal direction is small, stable signal transmission becomes possible.

2 and 3, a dielectric layer 240 is interposed between the first partition walls 212 and the second partition walls 222. The dielectric layer 240 is intended to have an insulation breakdown voltage between the first discharge electrodes 213 and the second discharge electrodes 223. Such dielectrics include PbO, B ₂ O ₃ , and SiO ₂ .

A portion of the side surfaces of the first barrier ribs 212 adjacent to the portion where the first discharge electrodes 213 are disposed is preferably covered by the MgO layers 216 as the first protective layers 216. In addition, a portion adjacent to the portion where the second discharge electrodes 223 are disposed among the side surfaces of the second partition portions 222 may also be covered by the MgO layers 226 as the second protective layers 226. . Although these MgO layers 216 and 226 are not essential components, this is because charged particles impinge on the first partition portions 212 and the second partition portions 222 and thus the first partition portions 212 and the second. It prevents damaging the partition 222 and emits a lot of secondary electrons during discharge.

As shown in FIGS. 2 and 3, the first phosphor layers 215 may be formed on the side portions of the first partition portions 212 and the first substrate portions 211 between the first partition portions 212. It is coated on. In particular, the first phosphor layers applied to the side portions of the first partition portions 212 are disposed between the first protective layers 216 and the first substrate portion 211. In addition, the second phosphor layers 225 are coated on the side portions of the second partition portions 222 and on the second substrate portion 221 between the second partition portions 222. Similar to the first phosphor layers 215, the second phosphor layers applied to the side portions of the second partition walls 222 are disposed between the second protective layers 226 and the second substrate portion 221. do.

The first and second phosphor layers 215 and 225 have a component that generates ultraviolet light by receiving ultraviolet rays. The phosphor layer formed in the red discharge cell includes phosphors such as Y (V, P) O ₄ : Eu and the like. The phosphor layer formed on the green discharge cell includes phosphors such as Zn ₂ SiO ₄ : Mn, YBO ₃ : Tb, and the like, and the phosphor layer formed on the blue discharge cell includes phosphors such as BAM: Eu.

The discharge cell 230 is filled with a discharge gas such as Ne, Xe, and the like and a mixed gas thereof. In the case of the present invention including this embodiment, the discharge surface can be increased and the discharge region can be enlarged, so that the amount of plasma formed is increased, thereby enabling low voltage driving. Therefore, even when a high concentration of Xe gas is used as the discharge gas, the low voltage driving can be performed, thereby significantly improving the luminous efficiency. This solves the problem of low voltage driving when using a high concentration of Xe gas as a discharge gas in a conventional plasma display panel.

Hereinafter, a method of manufacturing the plasma display panel 200 will be described in detail.

The plasma display panel 200 may be manufactured by separately manufacturing the first panel 250 and the second panel 260 separately, and then, the plasma display panel 200 is sealed and bonded to each other by a sealing member such as frit glass.

First, a method of manufacturing the second panel 250 is as follows. After the mask for forming the second partition wall portion on the glass having a predetermined thickness, the second partition having the second partition wall portion 222 and the second substrate portion 221 by sandblasting, etching, etc. The substrate 220 is formed. Thereafter, sandblasting is performed using a mask having a pattern substantially the same as the shape of the second discharge electrodes to form second grooves 222a having a predetermined depth so that the second discharge electrodes 223 may be disposed. . The second grooves 222a may be formed using another method such as an etching method. After the second grooves 222a are formed, the light absorbing material paste is printed and then dried and baked to form the second light absorbing materials 227. After the second light absorbing materials 227 are formed, an electrode material is printed in the second grooves 222a, and then the second discharge electrodes 223 are formed by drying and baking. After the second discharge electrodes 223 are formed, a dielectric is coated on the second partition 222 to fill the second discharge electrodes 223, and then fired and dried to form the dielectric layer 240. In this example, the dielectric layer 240 is formed on the second partition 222, but the dielectric layer 240 fills the first discharge electrodes 213 disposed in the first grooves 212a. Or on the first partition walls 212 and the second partition walls 222, respectively. After the dielectric layer 240 is formed, the second phosphor layers 225 are formed on the second substrate 220 by using a pattern printing method or a photosensitive printing method. After the second phosphor layers 225 are formed, the second protective layers 226 are formed using a deposition method or the like.

The first panel 260 including the first substrate 210, the first discharge electrodes 213, the first phosphor layer 215, the first protective layers 216, and the first light absorbing material 217. Method of manufacturing is omitted because it is similar to the method of manufacturing the second panel 250.

In the case of the plasma display panel 220 according to the present invention, a process of manufacturing the first panel 260 and the second panel 250 is simple as described above, and the first panel 260 and the second panel 250 are simple. Since the manufacturing process of is similar, it has advantages in process efficiency and cost reduction.

In the plasma display panel 200 according to the first embodiment of the present invention having the above structure, address discharge occurs between the first discharge electrode 213 and the second discharge electrode 223, As a result, the discharge cell 230 in which sustain discharge is to be generated is selected. Thereafter, when a sustain discharge voltage of alternating current is applied between the first discharge electrode 213 and the second discharge electrode 223 of the selected discharge cell 230, the first discharge electrode 213 and the second discharge electrode 223 are applied. A sustain discharge occurs between). Ultraviolet rays are emitted while the energy level of the discharged gas excited by this sustain discharge is lowered. The ultraviolet rays excite the first and second phosphor layers 215 and 225 applied in the discharge cell 230, and the visible light is emitted as the energy levels of the excited first and second phosphor layers 215 and 225 are lowered. The emitted visible light constitutes an image.

In the conventional plasma display panel 100, the sustain discharge between the sustain electrodes 106, 107 occurs in the horizontal direction, the discharge area is relatively narrow. However, the sustain discharge of the plasma display panel 200 according to the present embodiment may occur not only in all aspects of defining the discharge cells 230, but also in that the discharge area is relatively large.

In addition, the sustain discharge in this embodiment is formed in a closed curve along the side of the discharge cell 230 and gradually diffuses to the center portion of the discharge cell 230. As a result, the volume of the region where the sustain discharge occurs is increased, and the space charge in the discharge cell, which is not well used in the past, also contributes to light emission. Such matters result in the improvement of the luminous efficiency of the plasma display panel. In particular, in this embodiment, since the cross section of the discharge cells 230 is circular, there is an advantage that the sustain discharge occurs uniformly on all sides of the discharge cells (230).

In addition, since the sustain discharge is performed only at the center portion of the discharge cell, ion sputtering of the phosphor by the charged particles, which has been a problem of the conventional plasma display panel 100, is prevented, thereby preventing permanent image retention even when the same image is displayed for a long time. This has the advantage that it does not occur.

Second Embodiment

FIG. 5 is a partially separated perspective view of the plasma display panel 300 according to the second exemplary embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5. FIG. 7 is a layout view illustrating the discharge cells and the electrodes illustrated in FIG. 5. Hereinafter, description will be focused on the matters different from those of the first embodiment.

According to the present invention, a plasma display panel includes a first substrate 310, first discharge electrodes 313, first protective layers 316, first phosphor layers 315, address electrodes 317, and a first substrate 310. The first light absorbing materials 317, the dielectric layer 319, the second substrate 320, the second discharge electrodes 323, the dielectric layer 340, the second protective layers 326, and the second phosphor layer 325 ), Second light absorbing materials 327.

The first substrate 310 and the second substrate 320 are spaced apart in parallel at predetermined intervals, and they are preferably formed of a material including glass to improve visible light transmittance.

The first substrate 310 includes a first substrate portion 311 and first partition walls 312. The first substrate portion 311 is in the shape of a flat glass plate, the first partition portion 312 is disposed on the first substrate portion 311 facing the second substrate 320, the first partition portion 312 ) And the first substrate 311 are integrally formed.

  The second substrate 320 includes a second substrate portion 321 and second partition walls 322. The second substrate portion 321 is in the shape of a flat glass plate, and the second partition portions 322 are disposed on the second substrate portion 321 facing the first substrate 310, and the second partition portion 322 is formed. ) And the second substrate 321 form an integral part.

Similar to the first embodiment, the first partition walls 312 and the second partition walls 322 may have various shapes, and are preferably formed to partition the discharge cells 330 having a circular cross section. . The first partition walls 312 and the second partition walls 322 may have different shapes, but preferably have the same shape.

As illustrated in FIG. 7, the first discharge electrodes 313 and the second discharge electrodes 323 extending surrounding the discharge cells 330 arranged in one direction are disposed. The first discharge electrodes 313 are paired with the second discharge electrodes 314, and the first discharge electrodes 313 and the second discharge electrodes 314 generate a plasma discharge in the discharge cells 330. Do this. However, unlike the first embodiment, the first discharge electrodes 313 and the second discharge electrodes 323 are arranged to extend in parallel with each other. More detailed description is as follows.

First grooves 312a are formed at predetermined depths on the first partition walls 312 facing the second partition walls 322. The first groove 312a is formed to extend while surrounding the discharge cells 330 disposed along one row. The first light absorbing materials 317 and the first discharge electrodes 313 are sequentially disposed in the first grooves 312a. The first discharge electrodes 313 extend to surround the discharge cells 330 arranged along one row, and the first discharge electrodes 313 extend in parallel to be spaced apart from each other at predetermined intervals.

In addition, second grooves 322a are formed on the second partition walls 312 facing the first partition walls 312 at a predetermined depth. The second grooves 322a are formed to surround the discharge cells 330 arranged along one row, and the direction in which the second grooves 322a extend is parallel to the direction in which the second grooves 322a extend. Is extended. The second light absorbing materials 327 and the second discharge electrodes 323 are sequentially disposed in the second grooves 322a. The second discharge electrodes 323 extend while surrounding the discharge cells 330 arranged along one row, and the second discharge electrodes 323 are spaced apart from each other at predetermined intervals and extend in parallel.

The material characteristics of the first discharge electrodes 313, the second discharge electrodes 323, the first light absorbing materials 317, and the second light absorbing materials 327 are different from those of the corresponding components of the first embodiment. Since it is the same, it is omitted here.

5 and 6, a dielectric layer 340 is interposed between the first partition walls 312 and the second partition walls 322. The dielectric layer 340 is intended to have an insulation breakdown voltage between the first discharge electrodes 313 and the second discharge electrodes 323. Such dielectrics include PbO, B ₂ O ₃ , and SiO ₂ .

On the opposite side of the first substrate portion 311 facing the second substrate 320, address electrodes 319 extending across the discharge cells 330 are disposed. The address electrodes 319 extend to cross the direction in which the first discharge electrode 313 and the second discharge electrode 323 extend. However, the location of the address electrodes is not limited thereto, and the address electrodes may be disposed at various locations including an opposite surface of the second substrate 321 facing the first substrate 310.

The address electrodes 319 are used to cause an address discharge to facilitate a sustain discharge between the first discharge electrode 313 and the second discharge electrode 323. More specifically, the address electrodes 319 lower the voltage at which the sustain discharge starts. Do it. The address discharge is a discharge occurring between the scan electrode and the address electrode. When the address discharge is completed, cations are accumulated on the scan electrode side and electrons are accumulated on the common electrode side, thereby making it easier to sustain discharge between the scan electrode and the common electrode.

Since the address discharge occurs efficiently when the distance between the scan electrode and the address electrode is narrow, in the present embodiment, the first discharge electrodes 313 close to the address electrodes 319 serve as the scan electrodes, and the second discharge electrodes It is preferable that the 323 act as a common electrode.

The address electrodes 319 are preferably embedded by the dielectric layer 318. The dielectric layer 318 may be formed to locally fill only the address electrodes 319, and may be applied to the entire surface of the first substrate 311. The dielectric layer 318 is formed as a dielectric that prevents damaging the address electrode 319. Such dielectrics include PbO, B ₂ O ₃ , SiO _2, and the like.

First phosphor layers 315 disposed on side surfaces of the first partition portions 312 and the first substrate portion 312, and on side surfaces and second substrate portions 322 of the second partition portions 322. Since the structure, function and material properties of the second phosphor layers 325 are the same as or similar to those of the first and second phosphor layers 315 and 325 of the first embodiment, they will be omitted here.

In addition, the structure, operation, and material properties of the first and second protective layers 316 and 326 disposed on the side surfaces of the first partition portions 312 and the second partition portion 322 are similar to those of the first embodiment described above. Since it is the same as or similar to the first and second protective layers 216 and 226, a description thereof will be omitted.

In the plasma display panel 300 according to the second embodiment of the present invention having the above-described configuration, address discharge occurs by applying an address voltage between the address electrode 319 and the first discharge electrode 313. As a result of the discharge, the discharge cells 330 in which sustain discharge is to be generated are selected.

Thereafter, when a sustain discharge voltage of alternating current is applied between the first discharge electrode 313 and the second discharge electrode 323 of the selected discharge cell 330, the first discharge electrode 313 and the second discharge electrode 323 are applied. A sustain discharge occurs between). Ultraviolet rays are emitted while the energy level of the discharged gas excited by this sustain discharge is lowered. The ultraviolet rays excite the first and second phosphor layers 315 and 325 applied in the discharge cell 330, and the visible light is emitted as the energy levels of the excited first and second phosphor layers 315 and 325 are lowered. The emitted visible light constitutes an image.

The inherent characteristics of the present invention appearing upon the plasma discharge are the same as or similar to those of the first embodiment described above, and thus are omitted here.

The plasma display panel according to the present invention has the following effects.

First, since the partition is integrally formed with the substrate, the strength of the partition increases.

Second, when manufacturing the plasma display panel, the manufacturing process of the first panel and the second panel is very similar, and the manufacturing process is simplified. Thus, the overall manufacturing cost is reduced.

Third, since the visible light incident from the outside is absorbed by the light absorbing material, the reflected luminance is reduced. Thus, clear room contrast of the plasma display panel is improved.

Fourth, since the surface discharge can be generated from all sides forming the discharge space, the discharge surface can be greatly enlarged.

Fifth, since the discharge is generated in terms of forming the discharge cell and diffused to the center portion of the discharge cell, the discharge area is remarkably improved compared to the conventional one, so that the entire discharge cell can be efficiently used. Therefore, the driving can be performed even at a low voltage, thereby significantly improving the luminous efficiency.

Sixth, since low voltage driving is possible, even when a high concentration of Xe gas is used as the discharge gas, low voltage driving is possible, thereby improving luminous efficiency.

Seventh, the discharge response speed is high and low voltage driving is possible. Since the discharge electrodes are not disposed on the first and second substrates through which visible light is transmitted, but are disposed on the side of the discharge space, discharge of low-resistance electrodes such as metal electrodes without the need for using transparent electrodes having high resistance as discharge electrodes. Since it can be used as an electrode, the discharge response speed is high, and low voltage driving is possible without distortion of the waveform.

Eighth, permanent afterimage can be prevented. The electric field due to the voltage applied to the discharge electrode formed on the side of the discharge space concentrates the plasma in the center of the discharge space, thereby preventing the ions generated by the discharge from colliding with the phosphor by the electric field even after a long discharge. In addition, it is possible to fundamentally prevent the problem of permanent afterimage caused by phosphor damage caused by ion sputtering. In particular, when using a high concentration of Xe gas as the discharge gas, the problem of permanent afterimage is very serious, in the case of the present invention it is possible to prevent such permanent afterimage inherently.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (18)

A first substrate having first partition walls that define a plurality of discharge cells; A second substrate disposed to face the first substrate, the second substrate including second partition wall portions that partition the discharge cells together with the first partition wall portions; A plurality of pairs of first and second discharge electrodes causing discharge in the discharge cells; At least one light absorbing material interposed between the first substrate and the second substrate and including a material absorbing visible light incident from the outside; Phosphor layers disposed in the discharge cells; And And a discharge gas disposed in the discharge cells. The method of claim 1, And the light absorbing material is interposed between the first and second partition walls. The method of claim 2, And first grooves extending around the discharge cells arranged in one direction, and wherein the light absorbing material is disposed in the first grooves. The method of claim 3, And the first discharge electrodes are disposed in the first grooves and extend around the discharge cells arranged in one direction. The method of claim 4, wherein And the light absorbing material and the first discharge electrodes are sequentially arranged in the first grooves from the inside. The method of claim 4, wherein And a first passivation layer disposed on at least a portion of side surfaces of the first partition walls in which the first discharge electrodes are disposed. The method of claim 2, And second grooves extending in the second partition wall to surround the discharge cells arranged in one direction, and wherein the light absorbing material is disposed in the second grooves. The method of claim 7, wherein And the second discharge electrodes are disposed in the second grooves and extend around the discharge cells arranged in one direction. The method of claim 8, And the light absorbing material and the second discharge electrodes are sequentially arranged in the second grooves from the inside. The method of claim 8, And second protective layers disposed on at least a portion of side surfaces of the second partition walls in which the second discharge electrodes are disposed. The method of claim 1, And a dielectric layer interposed between the first partition walls and the second partition walls. The method of claim 1, And the first discharge electrodes and the second discharge electrodes extend to cross each other. The method of claim 1, The first discharge electrodes and the second discharge electrodes extend in parallel to each other, And an address electrode extending to cross the direction in which the first discharge electrodes and the second discharge electrodes extend. The method of claim 13, And a dielectric layer covering the address electrodes. The method of claim 1, And the phosphor layers are disposed on the first substrate facing at least the second substrate. The method of claim 1, And the phosphor layers are disposed on at least the second substrate facing the first substrate. The method of claim 1, And the first substrate is formed of a transparent material. The method of claim 1, And the second substrate is formed of a transparent material.

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