KR100717785B1 - Plasma display panel - Google Patents

Abstract

The plasma display panel of the present invention improves resolution and color purity and has an appropriate electrode structure. The plasma display panel includes a first substrate and a second substrate that are disposed to face each other, and an address electrode formed to extend in one direction on the first substrate, and the first substrate. A partition wall disposed between the substrate and the second substrate to form a plurality of pixels having a discharge space in the same repeating structure and three subpixels having different sizes in each pixel, a phosphor layer formed in the discharge space, and And a first electrode and a second electrode formed on the second substrate to correspond to the partition wall in a direction crossing the address electrode and to correspond to both sides of the discharge space along the address electrode extension direction.

Plasma, color purity, discharge space, electrode, red, green, blue, resolution

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a partially exploded perspective view schematically showing a plasma display panel according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the plasma display panel of FIG. 1 combined and cut along the line A-A.

3 is a plan view illustrating an arrangement state of discharge spaces and electrodes in the plasma display panel of FIG. 1.

4 and 6 are plan views illustrating arrangement states of discharge spaces and electrodes in the plasma display panel according to the second to fourth embodiments of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having an electrode structure that improves resolution and color purity.

In general, a plasma display panel seals a rear substrate and a front substrate to form a discharge cell therebetween, charges the discharge gas into the discharge cell, and causes a glow discharge in the discharge cell. Consists of.

The plasma display panel generates plasma by glow discharge occurring in each discharge cell, generates vacuum ultraviolet rays from the plasma, excites the fluorescent substance with the vacuum ultraviolet rays, and emits red, green, and blue visible light from the fluorescent substance. To generate an image.

The glow discharge generated inside the discharge cell is induced by the dielectric layer, the phosphor layer, and the discharge gas existing between the address electrode and the display electrode and is greatly influenced by the material characteristics and the shape characteristics of these components.

Substantially, since the dielectric layer is formed to have a substantially uniform thickness throughout the substrate, it can be said that there is no large characteristic difference for each discharge cell of red, green, and blue.

The phosphor layer has a significantly different aspect from the dielectric layer. This phosphor layer uses phosphors of different materials in order to generate red, green, or blue visible light according to each discharge cell.

That is, the phosphor that generates red visible light is formed of a material such as Y _0.35 Gd _0.35 BO ₃ (yttrium gadolinium borate with Eu as the emission center), Y ₂ O ₃ : EU, Gd ₂ O ₃ : Eu, and emits green visible light. The phosphor that is generated is formed of a material such as Zn ₂ SiO ₄ : Mn (zinc silicate with Mn as the emission center), BaAl ₁₂ O ₁₉ : YBO ₃ : Tb, and the phosphor that generates blue visible light is BaMgAl ₁₀ O ₁₇ : Eu (Barium magnesium aluminate with Eu as the emission center).

Therefore, the phosphor layer has a different dielectric constant for each phosphor of each discharge cell, and has a thickness difference for each phosphor when fabricating a plasma display panel. As such, the material characteristics and the shape characteristics of the phosphor layer generate a difference in capacitance formed between the corresponding electrodes during address discharge in each discharge cell.

Despite the fact that each of the discharge cells is provided with phosphor layers having different characteristics, the plasma display panel is formed with the same size of each discharge cell. Therefore, the wavelength of the visible light in the phosphor layer formed in each discharge cell has a single wavelength. It mixes at different wavelengths, rather than lowers color purity.

In addition, since the plasma display panel forms the same structure of each subpixel of red, blue, and green, each pixel has a low resolution.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display panel which improves resolution and color purity and has an electrode structure suitable for this.

It is also an object of the present invention to provide a plasma display panel which has improved contrast and has an appropriate electrode structure.

The plasma display panel according to the present invention includes a first substrate and a second substrate disposed to face each other, an address electrode extending in one direction on the first substrate, and a discharge space between the first substrate and the second substrate. A barrier rib forming a plurality of pixels having the same repeating structure and forming three subpixels having different sizes in each pixel, a phosphor layer formed in the discharge space, and the barrier rib in a direction crossing the address electrode; And a first electrode and a second electrode corresponding to both sides of the discharge space along the address electrode extension direction.

Each of the first electrode and the second electrode is preferably formed of a metal bus electrode and has excellent electrical conductivity.

The partition wall may form the pixel in a hexagon or an octagon.

The distance L _{y in the} direction of the address electrode of the pixel may be smaller than the distance L _{x in} the direction orthogonal thereto, thereby improving the vertical resolution.

The distance L _y2 of the pixel in the direction of the address electrode is greater than the distance L _{x2 in} the direction orthogonal thereto, so that the horizontal resolution may be improved.

The pixel includes a subpixel having a red (R) phosphor layer, a subpixel having a green (G) phosphor layer, and a subpixel having a blue (B) phosphor layer in a direction perpendicular to the address electrode. do.

The pixels are arranged surrounded by four adjacent pixels.

The partition wall extends in a direction crossing the address electrode and is arranged side by side in the direction in which the address electrode extends, and ends of the other partition wall member adjacent to the front end thereof at both ends of the first partition member. And a third partition member and a fourth partition member disposed in a pixel formed by the first partition member and the second partition member to interconnect the first partition member to form three subpixels. Include.

The first partition member is shared by pixels continuously disposed in the address electrode extension direction. The second partition member is partially shared by pixels arranged in succession.

Each of the first electrode and the second electrode corresponds to the first partition member, and continuously corresponds to a portion of the second partition member on the side of the first partition member that is connected to the first partition member. And a curved shape corresponding to a portion of the second partition member.

Each of the first electrode and the second electrode includes a first counterpart corresponding to the first barrier member and a second counterpart formed at both ends of the first counterpart and corresponding to the second barrier member.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted for simplicity of explanation, and like reference numerals designate like elements throughout the specification.

1 is a partially exploded perspective view schematically illustrating a plasma display panel according to a first exemplary embodiment of the present invention, and FIG. 2 is a partial cross-sectional view of the plasma display panel of FIG. 1 taken along line AA. 3 is a plan view illustrating an arrangement state of discharge spaces and electrodes in the plasma display panel of FIG. 1.

Referring to the plasma display panel with reference to the drawings, the plasma display panel of the first embodiment is basically the first substrate (10, hereinafter referred to as the "back substrate") and the second substrate 20 are arranged to face at a predetermined interval And a partition wall 16 provided between the rear substrate 10 and the front substrate 20 to form a plurality of discharge spaces 17. The discharge space 17 includes a phosphor layer 19 that absorbs vacuum ultraviolet rays and emits visible light, and discharge gas (for example, neon and xen) to generate vacuum ultraviolet rays by plasma discharge. Mixed gas) containing the same.

The plasma display panel is configured to generate vacuum ultraviolet rays that will collide with the phosphor layer 19 by plasma discharge, thereby realizing an image, and the address electrodes 11 corresponding to the respective discharge spaces 17 and the respective discharge spaces while crossing each other. And a second electrode 32 (hereinafter referred to as a 'keeping electrode') and a second electrode 32 (hereinafter referred to as a 'scan electrode') corresponding to 17).

The address electrode 11 applies an address pulse to generate an address discharge along with a scan pulse applied to the scan electrode 32 to select a discharge space 17 to be turned on. After this address discharge, the sustain electrode 31 and the scan electrode 32 generate sustain discharge by sustain pulses applied alternately to each other to implement an image in the selected discharge space 17. After the sustain discharge, in the state where the sustain electrode 31 is biased to the reference voltage, the scan electrode 32 resets each discharge space 17 by a reset pulse having a voltage higher than that of the sustain pulse. Each of the electrodes may have a different role as described above depending on the signal voltage applied thereto, and thus the present invention is not limited to the above.

The address electrode 11 extends in one direction (y-axis direction in the drawing) between the front substrate 20 and the rear substrate 10 on the inner surface of the rear substrate 10. In addition, the address electrode 11 is covered with the first dielectric layer 13. The first dielectric layer 13 is formed to cover the remaining portion of the rear substrate 10 including the address electrode 11 to protect the address electrode 11 during discharge, and to maintain the discharge due to low voltage. Form and accumulate charges. The address electrodes 11 are arranged in parallel with each other while maintaining a distance (x axis direction) corresponding to the other address electrodes 11 and the discharge space 17.

The sustain electrode 31 and the scan electrode 32 are parallel to each other and are spaced apart in the z-axis direction to intersect the address electrode 11, correspond to the partition 16, and correspond to each other of the address electrode 12. The inner surface of the front substrate 20 is provided to correspond to both sides of the discharge space 17 along the stretching direction (y axis direction) (see FIG. 1).

Since each of the sustain electrodes 31 and the scan electrodes 32 is formed correspondingly along the partition 16 that does not generate visible light, the blocking of the visible light generated in the discharge space 17 can be minimized. As a result, the sustain electrode 31 and the scan electrode 32 may be formed of an opaque metal bus electrode having excellent electrical conductivity. Of course, each of the sustain electrode 31 and the scan electrode 32 includes a transparent electrode (not shown) formed on the inner surface of the front substrate 20 corresponding to the discharge space 17. It may be formed including a bus electrode for supplying a voltage.

The sustain electrode 31 and the scan electrode 32 are shared by the pixels 18 adjacent to each other in the y axis direction and participate in sustain discharge of both pixels 18 disposed adjacent to the y axis direction.

The sustain electrode 31 and the scan electrode 32 are covered with a laminated structure of the second dielectric layer 21 and the protective film 23. The second dielectric layer 21 forms and accumulates wall charges to enable sustain discharge by a low voltage, and also protects the sustain electrode 31 and the scan electrode 32 during discharge. The protective layer 23 is formed to cover the second dielectric layer 21 to protect the second dielectric layer 21 during discharge, increase the secondary electron emission coefficient to further lower the discharge start voltage, and transmit visible light. It is preferable to form with a visible light transmissive MgO protective film.

The partition wall 16 has a plurality of pixels 18 having the discharge spaces 17 corresponding to the address electrodes 11, the sustain electrodes 31, and the scan electrodes 32 in the same repeating structure. It is formed between the back substrate 10 and the front substrate 20. This pixel 18 has three subpixels 18R, 18G and 18B having different sizes (on the x-y plane).

Phosphor layer 19R for generating red visible light is formed in this subpixel 18R, phosphor layer 19G for generating green visible light is formed in another subpixel 18G, and in another subpixel 18B. The phosphor layer 19B for generating blue visible light is formed. These three subpixels 18R, 18G, and 18B are partitioned into one pixel 18 and are continuously formed along the x axis direction.

The three subpixels 18R, 18G, and 18B may be set to a relative size capable of exhibiting an optimal color purity according to the material and shape characteristics of the phosphors forming the respective phosphor layers 19R, 19G, and 19B. . Since the relative sizes of these subpixels 18R, 18G, and 18B can be set differently according to the material properties and the shape properties of the phosphor, the present invention does not specifically limit their sizes.

Each pixel 18 may be formed in a hexagon or an octagon so as to easily form the three subpixels 18R, 18G, and 18B in different sizes. The hexagonal or octagonal pixel 18 has a different size in the direction in which the address electrode 11 extends (y-axis direction) and in a direction orthogonal thereto (x-axis direction). In the present invention, the hexagon and the octagon mean a planar shape when the pixel 18 is viewed on the x-y plane.

In the first embodiment, the distance L _{y in the} extending direction (y axis direction) of the address electrode 11 is formed smaller than the distance L _{x in} the direction (x axis direction) orthogonal thereto. . Therefore, within the same distance in the x-axis direction and the y-axis direction, the number of pixels 18 arranged in the y-axis direction is greater than the number of pixels 18 arranged in the x-axis direction, so the vertical direction (y-axis direction) The vertical resolution of can be improved.

Each pixel 18 having these three subpixels 18R, 18G, 18B forms an arrangement surrounded by four other pixels 18 adjacent thereto. The non-discharge area 28 is provided between four adjacent pixels. Since the non-discharge area 28 does not generate visible light, a black layer (not shown) may be provided on the opposing front substrate 20 to improve contrast.

The partition wall 16 forming the pixel 18 and the subpixels 18R, 18G, and 18B having such a structure includes a first partition member 16a, a second partition member 16b, and a third partition member 16c. The fourth partition member 16d is included.

The first partition member 16a extends in the direction intersecting the address electrode 11 (x-axis direction) and is provided on both sides of each pixel 18 along the y-axis direction, so that the y-axis direction of the pixel 18 Form both sides. The plurality of first partition members 16a may be in parallel with each other along the extension direction (y axis direction) of the address electrode 11. In addition, the first partition wall member 16a is intermittently disposed while maintaining a distance corresponding to the pixel 18 along the x-axis direction. The first partition member 16a is shared by the pixels 18 that are continuously arranged in the extending direction (y axis direction) of the address electrode 11.

The second partition wall member 16b interconnects the front end of the first partition wall member 16a and the front end of another neighboring first partition wall member 16a at both ends of the first partition wall member 16a. As a result, the pixel 18 forms a closed structure. The second partition member 16b is connected to the second partition member 16b of the other pixels 18 that are continuously disposed in the direction (x axis direction) that intersects the extension direction (y axis direction) of the address electrode 11. do. The second partition wall member 16b may be partially shared with the other pixels 18 arranged in succession. According to the curved shape of the second partition member 16b, the pixel 18 may be formed in a hexagon or an octagon. In the first embodiment, since the second partition wall member 16a has a curved shape, the hexagonal pixel 18 is formed.

The third partition member 16c and the fourth partition member 16d are disposed in the pixel 18 formed by the first partition member 16a and the second partition member 16b, so that the first partition member 16a on both sides is disposed. , 16a are interconnected to form three subpixels 18R, 18G and 18B in one pixel 18. The relative sizes of the subpixels 18R, 18G, and 18B are set in accordance with the positions of the third and fourth partition wall members 16c and 16d. The relative sizes of the subpixels 18R, 18G, and 18B can complement the material and shape characteristics of the phosphor to improve color purity.

Since the partition wall 16 is formed as described above, each of the sustain electrode 31 and the scan electrode 32 made of a bus electrode is connected to the first partition member 16a and the first partition member 16a. The front substrate 20 is formed in a curved shape corresponding to a portion of the first partition member 16a and the second partition member 16b in a continuous manner to correspond to a part of the second partition member 16b on the side of the partition member 16a. Thus, blocking of visible light generated in the discharge space 17 can be minimized.

That is, each of the sustain electrode 31 and the scan electrode 32 is provided at both ends of the first counterparts 31a and 32a corresponding to the first partition member 16a and the first counterparts 31a and 32a. It is formed to include a second corresponding portion (31b, 32b) corresponding to the second partition member (16b). The second counterparts 31b and 32b are connected to the second counterparts 31b and 32b of adjacent pixels 18, respectively.

The first counterparts 31a and 32a partially participate in the discharge in response to the subpixel 18G and the other subpixels 18R and 18B provided on both sides thereof. The second counterparts 31b and 32b provided on both sides of the first counterparts 31a and 32a participate in the discharge corresponding to the subpixels 18R and 18B provided on both sides of the subpixel 18G.

Hereinafter, more various embodiments of the present invention will be described. Since the following embodiments are generally similar or identical in structure to those of the first embodiment, detailed description thereof will be omitted and other parts will be described herein.

4 and 6 are plan views illustrating arrangement states of discharge spaces and electrodes in the plasma display panel according to the second to fourth embodiments of the present invention.

4 is a second embodiment of the present invention. Unlike the first embodiment, the second embodiment has a distance L _{x2 in} the direction (x axis direction) orthogonal to the distance L _{y2 in the} direction (y axis direction) of the address electrode 11 of the pixel 18 ₂ . It is larger than). Therefore, since the number of pixels 18 ₂ arranged in the x-axis direction within the same distance is larger than the number of pixels 18 ₂ arranged in the y-axis direction, the horizontal resolution in the horizontal direction (y-axis direction) is improved.

5 is a third embodiment of the present invention. The third embodiment is a modification of the first embodiment, the second barrier rib members (16b ₃₎ is partially shared by the continuous pixel (18, ₃₎ are arranged. In other words, the second partition member 16b ₃ is bent twice. Due to this, the partition wall (16 ₃₎ is formed of a pixel (18, ₃₎ as an octagon.

6 is a fourth embodiment of the present invention. This fourth embodiment is a modification of the second embodiment and includes a second partition wall member 16b ₄ as in the third embodiment. This second partition member 16b ₄ is also partially shared by the pixels 18 ₄ that are continuously arranged. That is, the second partition member 16b ₄ is also bent twice. As a result, the partition 16 ₄ forms the pixel 18 ₄ in an octagonal shape.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

As described above, according to the plasma display panel according to the present invention, a plurality of pixels having discharge spaces are formed in the same repeating structure by disposing a partition between the rear substrate and the front substrate, and the sustain electrode and the scan electrode are formed on the partition structure. Since it is formed to be bent correspondingly, there is an effect of realizing a high resolution by miniaturizing the subpixels.

Further, according to the present invention, three subpixels having different sizes are formed in each pixel, and phosphor layers for generating red, green, and blue visible light are formed in the respective subpixels, thereby forming different phosphors. Complementary with each other, each light emitting layer has a visible light having a wavelength close to a single wavelength, thereby improving the color purity.

In addition, according to the present invention, by providing non-discharge regions other than partition walls between pixels, there is an effect of improving contrast.

Claims (13)

delete A first substrate and a second substrate disposed to face each other; An address electrode extending in one direction on the first substrate; A partition wall disposed between the first substrate and the second substrate to form a plurality of pixels having a discharge space and a non-discharge region in the same repeating structure, and to form three subpixels having different sizes in each pixel; A phosphor layer formed in the discharge space; And A first electrode and a second electrode formed on the second substrate to correspond along the partition wall in a direction crossing the address electrode and to correspond to both sides of the discharge space along the address electrode extension direction; The pixels are adjacent to at least one non-discharge area, And each of the first electrode and the second electrode is formed of a metal bus electrode. delete delete A first substrate and a second substrate disposed to face each other; An address electrode extending in one direction on the first substrate; A partition wall disposed between the first substrate and the second substrate to form a plurality of pixels having a discharge space and a non-discharge region in the same repeating structure, and to form three subpixels having different sizes in each pixel; A phosphor layer formed in the discharge space; And A first electrode and a second electrode formed on the second substrate to correspond along the partition wall in a direction crossing the address electrode and to correspond to both sides of the discharge space along the address electrode extension direction; The pixels are adjacent to at least one non-discharge area, And the distance L _y of the pixel in the direction of the address electrode is smaller than the distance L _x of the direction orthogonal thereto. A first substrate and a second substrate disposed to face each other; An address electrode extending in one direction on the first substrate; A partition wall disposed between the first substrate and the second substrate to form a plurality of pixels having a discharge space and a non-discharge region in the same repeating structure, and to form three subpixels having different sizes in each pixel; A phosphor layer formed in the discharge space; And A first electrode and a second electrode formed on the second substrate to correspond along the partition wall in a direction crossing the address electrode and to correspond to both sides of the discharge space along the address electrode extension direction; The pixels are adjacent to at least one non-discharge area, And the distance L _y2 of the pixel in the direction of the address electrode is greater than the distance L _{x2 in} the direction orthogonal thereto. delete A first substrate and a second substrate disposed to face each other; An address electrode extending in one direction on the first substrate; A partition wall disposed between the first substrate and the second substrate to form a plurality of pixels having a discharge space and a non-discharge region in the same repeating structure, and to form three subpixels having different sizes in each pixel; A phosphor layer formed in the discharge space; And A first electrode and a second electrode formed on the second substrate to correspond along the partition wall in a direction crossing the address electrode and to correspond to both sides of the discharge space along the address electrode extension direction; The pixels are adjacent to at least one non-discharge area, And one non-discharge area is adjacent to the four pixels. A first substrate and a second substrate disposed to face each other; An address electrode extending in one direction on the first substrate; A partition wall disposed between the first substrate and the second substrate to form a plurality of pixels having a discharge space and a non-discharge region in the same repeating structure, and to form three subpixels having different sizes in each pixel; A phosphor layer formed in the discharge space; And A first electrode and a second electrode formed on the second substrate to correspond along the partition wall in a direction crossing the address electrode and to correspond to both sides of the discharge space along the address electrode extension direction; The pixels are adjacent to at least one non-discharge area, The partition wall extends in a direction crossing the address electrode and is arranged in parallel with the address electrode in a stretching direction, wherein A second partition member interconnecting a front end of the first partition member with a tip of another neighboring first partition member at both ends of the first partition member, and And a third partition member and a fourth partition member disposed in a pixel formed by the first partition member and the second partition member to interconnect the first partition member to form three subpixels. The method of claim 9, And the first partition member is shared by pixels continuously arranged in the address electrode extension direction. The method of claim 9, And the second partition member is partially shared by pixels arranged in succession. The method of claim 9, Each of the first electrode and the second electrode corresponds to the first partition member, and continuously corresponds to a part of the second partition member on the side of the first partition member that is connected to the first partition member. A plasma display panel having a curved shape corresponding to a portion of the member and the second partition wall member. The method of claim 9, Each of the first electrode and the second electrode may include a first counterpart corresponding to the first partition member; And a second counterpart formed on both ends of the first counterpart corresponding to the second partition member.

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