KR20080080865A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to improve brightness and image quality of the PDP(Plasma Display Panel) by coloring an upper dielectric layer and an external beam anti-reflection film using a color, whose luminosity and chroma are higher than black. Rear and front substrates(10,20) are opposed to each other. A barrier rib(16) is arranged between the substrates and defines plural discharge cells. A fluorescent layer is applied on the respective discharge cells. A first electrode(12) is extended along a first direction corresponding to the discharge cells on the rear substrate. A second electrode(27) is extended along a second direction, crossing the first direction, corresponding to the discharge cells on the front substrate. A dielectric layer(28) covers the second electrode on the front substrate and is colored in a first color. A filter(30) is attached to the front substrate. The filter includes an EMI(ElectroMagnetic Interference)-shielding conductive film and an external beam anti-reflection film. The external beam anti-reflection film is colored into a second color, which is a complement color of the first color.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

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

FIG. 2 is a side cross-sectional view taken along line II-II of FIG. 1. FIG.

3 is an enlarged side cross-sectional view of the filter according to the first embodiment.

FIG. 4 is a plan view showing a state where the filter and the dielectric layer of the first embodiment are superimposed and mixed blue.

5 is a side cross-sectional view of a plasma display panel according to a second embodiment of the present invention.

FIG. 6 is a plan view illustrating a state in which the filter, the display electrode, and the dielectric layer of the second embodiment are stacked and mixed blue.

7 is an enlarged side cross-sectional view of a filter attached to a front substrate in a plasma display panel according to a third embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel. More particularly, the present invention relates to a plasma display panel capable of increasing the front transmittance of visible light and preventing the bright room contrast from being lowered due to external light reflection.

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 capable of preventing external light incident on the front surface of the plasma display panel from being reflected and degrading display quality.

As is well known, a plasma display panel (hereinafter referred to as a "PDP") is a product generated by excitation of phosphors by vacuum ultraviolet (VUV) radiation emitted from plasma obtained through gas discharge. A display device for realizing an image using visible light of (R), green (G), and blue (B).

The PDP can realize a 60-inch or larger screen with a thickness of only 10 cm or less, and since it is a self-luminous display device such as a CRT, it has no characteristic of distortion due to color reproduction and viewing angle, and also has a simple manufacturing method compared to LCD. It is gaining attention as a TV and industrial flat panel display that have strengths in terms of productivity and cost.

In the PDP of the general AC three-electrode surface discharge structure, a pair of electrodes are formed on the front substrate to face each other, and the rear substrate spaced from the front substrate has an address electrode. Between the front substrate and the back substrate, a plurality of discharge cells partitioned by the partition wall are formed along the intersection of these electrodes and the address electrode. A phosphor layer is formed inside this discharge cell, and discharge gas is inject | poured.

In the PDP configured as described above, millions of unit discharge cells are arranged in a matrix form. These discharge cells select the discharge cells that are turned on and discharge cells that are not turned on by using the storage characteristics of wall charges, and display an image by sustaining discharge of the selected discharge cells.

However, while an image is displayed on the front surface of the PDP, outside light is incident from the various light sources outside the PDP to the front surface of the PDP. As the external light incident on the front surface of the PDP is reflected, the external light reflection is generated, which is mixed with the visible light displayed by the PDP, thereby reducing the display performance of the image actually expressed by the PDP.

In order to reduce such external light reflection, the display performance of the PDP is improved by external light reflection by absorbing external light incident using a colored partition wall.

However, as the partition wall is colored, a part of the visible light excited from the phosphor is absorbed by the vacuum ultraviolet rays generated by the plasma discharge inside the discharge cell, resulting in a decrease in luminance and, eventually, a luminous efficiency.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display panel capable of minimizing luminance deterioration and preventing the display quality of the plasma display panel from deteriorating due to external light reflection. .

In order to achieve the above object, a plasma display panel according to the present invention includes a rear substrate and a front substrate facing each other and opposed to each other, a partition wall disposed between the rear substrate and the front substrate to partition a plurality of discharge cells, and each discharge. A phosphor layer applied in the cells, a first electrode corresponding to each of the discharge cells on the rear substrate and formed along the first direction, and a cross crossing the first direction to correspond to each of the discharge cells on the front substrate; A second electrode formed by squeezing along two directions, and covering the second electrode on the front substrate, the dielectric layer colored in the first color, and a filter attached to the front substrate, wherein the filter includes an electromagnetic shielding conductive film and a first color And an external anti-reflection coating colored in a second color having a complementary color relationship of dark blue and mixed.

The dielectric layer may be colored orange, and the dielectric layer comprises at least one of Cu, Sb and Cr and may be colored orange.

The external light antireflection film may be colored in blue, and the external light antireflection film may include at least one of Mn, Ni, and Co, and may be colored in blue.

The second electrode includes a bus electrode formed along the partition wall and a transparent electrode extending from the bus electrode to the center of the discharge cells. The bus electrode may be colored in the first color.

The bus electrode contains at least one of Cu, Sb and Cr and may be colored orange.

The filter may be formed of a composite layer of an electromagnetic wave shielding conductive film and an external light antireflection film. This composite layer may comprise colored Indium-Tin Oxide (ITO).

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 in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

1 is a partial cutaway perspective view of a plasma display panel according to a first embodiment of the present invention, Figure 2 is a side cross-sectional view taken along the line II-II of FIG.

Referring to these drawings, the plasma display panel according to the present exemplary embodiment is disposed such that the rear substrate 10 and the front substrate 20 are disposed to face each other with a predetermined interval therebetween, and the rear substrate 10 and the front substrate ( A plurality of discharge cells 18 are partitioned by the partition wall 16 in the space between 20.

The partition wall 16 is formed to extend in a first direction (y-axis direction in the drawing) in a vertical partition 16b and in a second direction (x-axis direction in the drawing) orthogonal to the vertical partition wall 16b. It includes a horizontal partition wall 16a. Therefore, the discharge cells 18 partitioned by the vertical partition 16b and the horizontal partition 16a are partitioned in a lattice pattern.

However, the plasma display panel of the present invention is not necessarily limited thereto, and the discharge cells 18 partitioned by the partition wall 16 may be partitioned into a variety of patterns, such as a stripe or ulta pattern, in addition to the grid pattern described above. Of course it is.

Each of the discharge cells 18 partitioned by the partition wall 16 is a discharge gas (eg, a mixed gas including neon (Ne) and xenon (Xe)) to generate vacuum ultraviolet rays by gas discharge. And a phosphor layer 19 which absorbs the vacuum ultraviolet rays and emits visible light.

The phosphor layer 19 is formed of phosphors of the same color in the discharge cells 18 formed along the first direction, and red (R) on the discharge cells 18 repeatedly disposed along the second direction. It is formed repeatedly by phosphors of green (G) and blue (B).

A first electrode 12 (hereinafter referred to as an address electrode) is formed on the rear substrate 10 to correspond to the discharge cells 18 and is formed along the first direction and formed on the front substrate 20. A pair of second electrodes 27 (hereinafter referred to as display electrodes) are formed along the second direction crossing the one direction.

However, the present invention is not limited thereto, and the address electrode 12 may be formed on the front substrate 20, and the display electrode 27 may be formed on the rear substrate 10.

The lower dielectric layer 14 is formed on the back substrate 10 provided with the address electrode 12 to cover the address electrode 12. The lower dielectric layer 14 prevents breakage of the address electrode 12 during gas discharge and facilitates accumulation of charge. The partition 16 is formed on the lower dielectric layer 14.

The display electrode 27 includes a pair of scan electrodes 23 and sustain electrodes 26 formed parallel to each other along a second direction crossing the address electrodes 12 on the front substrate 20 surface.

The scan electrodes 23 and the sustain electrodes 26 each have a width extending from the bus electrodes 21 and 24 extending along the horizontal partition wall 16a and from the bus electrodes 21 and 24 to the discharge cell 18. And transparent electrodes 22 and 25 formed in the second direction.

The transparent electrodes 22 and 25 extend on the front substrate 20 in a stripe pattern to correspond to all of the red, green, and blue discharge cells 18R, 18G, and 18B in a second direction, and block visible light. It is made of transparent Indium-Tin Oxide (ITO) that can be prevented.

However, the present invention also includes that the transparent electrodes 22 and 25 correspond to the red, green, and blue discharge cells 18R, 18G, and 18B, and protrude from the bus electrodes 21 and 24 individually.

The bus electrodes 21 and 24 are made of an opaque metal material having excellent electrical conductivity to compensate for the voltage drop caused by the transparent electrode.

The bus electrodes 21 and 24 are arranged on both side partition walls 16a arranged with the discharge cells 18 therebetween so as to increase the transmittance of visible light generated in the discharge cells 18 by plasma discharge. It is preferable to be installed adjacently.

The upper dielectric layer 28 is formed on the front substrate 20 to cover the scan electrode 23 and the sustain electrode 26 to prevent breakage of the electrode during plasma discharge and to facilitate charge accumulation.

The upper dielectric layer 28 is dark blue mixed with the second color to be colored in the external light antireflection film 31 of the filter 30 to be described later, and the second color and complementary color relationship of the second color to prevent the external light incident from the outside from being reflected. It is colored in 1 color.

In the present embodiment, the upper dielectric layer 28 is illustrated to be colored in orange (O), which is a dark blue mixed primary color. The upper dielectric layer 28 may be colored orange (O) by mixing a colorant comprising at least one of Mn, Cu, and Sb into the dielectric.

A passivation layer 29 may be formed on the upper dielectric layer 28 to prevent damage due to exposure to plasma discharge occurring in the discharge cell 18.

The protective film 29 may be formed of a visible light transmissive MgO film that protects the upper dielectric layer 28 and has a high secondary electron emission coefficient, thereby further lowering the discharge start voltage.

Therefore, the plasma display panel selects a discharge cell 18 to be turned on by an address discharge between the address electrode 12 and the scan electrode 23, and then maintains the scan electrode 23 arranged in the selected discharge cell 18. An image is realized with visible light generated by sustain discharge between the electrodes 26.

In addition, a first surface of the upper dielectric layer 28 may be disposed on the front surface of the front substrate 20 to shield EMI emitted through the front substrate 20 when the plasma display panel is driven, and to prevent external light incident from the outside to be reflected. A filter 30 having a second color having a complementary color relationship that is mixed with color and dark blue is attached.

3 is an enlarged side cross-sectional view of a filter according to a first embodiment of the present invention.

Referring to FIG. 3, the filter 30 includes an electromagnetic wave shielding conductive film 32, an external light antireflection film 31, and a protective film 33. The electromagnetic wave shielding conductive film 32, the external light antireflection film 31, and the protective film 33 are attached to each other by an adhesive layer (not shown) therebetween.

The electromagnetic shielding conductive layer 32 is attached to the front substrate 20 and grounded to a chassis base (not shown) for supporting the plasma display panel and a casing (not shown) surrounding the electromagnetic waves generated when the plasma display panel is driven. It is configured to be.

The electromagnetic shielding conductive film 32 may be formed of an ITO film or a copper mesh, and a detailed description thereof will be omitted.

The external light antireflection film 31 is attached on the electromagnetic shielding conductive film 32 and colored in the second color of the complementary color relationship that is blue-mixed with the first color colored in the upper dielectric layer 28 described above.

Accordingly, the second color to be colored on the external light anti-reflection film 31 of the filter 30 may be composed of blue (B) having a complementary color relationship that is dark blue mixed with orange (O), which is the first color to be colored on the upper dielectric layer 28. have.

In this manner, the external light antireflection film 31 is colored blue (B) by mixing a colorant containing at least one component of Mn, Ni, and Co with a transparent resin material forming the film.

However, the present invention is not necessarily limited thereto, and the first color colored on the upper dielectric layer 28 is blue (B), and the second color dl orange (O) colored on the anti-reflection film 31 of the filter 30. It may be made of).

In addition, the first color to be colored in the upper dielectric layer 28 may be any one of the primary index blue green (C), purple (M), yellow (Y) of the navy blue mixture.

In this case, the second color to be colored on the external light antireflection film 31 of the filter 30 has a complementary color relationship with the primary indexes blue green (C), purple (M), and yellow (Y), respectively, of the dark blue color mixture, and the blue color mixture The primary colors may be mixed and made of any one of the navy blue mixed secondary colors created.

Therefore, the dark blue mixed secondary colors colored on the external light antireflection film 31 are red (R) in complementary color relations mixed with blue green (C) and navy blue, green (G) and yellow in complementary color relations mixed with purple (M). (Y) and navy blue (BL) in a complementary color relationship mixed with dark blue.

Here, red (R) is a secondary color obtained by navy blue mixing of the primary colors purple (M) and yellow (Y), and green (G) is dark blue the primary colors blue green (C) and yellow (Y). The secondary color obtained by mixing, and the indigo blue (BL) is the secondary color obtained by mixing the primary index purple (M) and blue green (C).

Of course, the upper dielectric layer 28 is colored in any one of green (G), indigo (BP), and red (R), which are dark blue mixed secondary colors, and the external light antireflection film 31 of the filter 30 is dark blue mixed. It may be colored with any one of the navy blue mixed primary index blue green (C), purple (M), and yellow (Y) having a complementary color relationship with the secondary color.

The protective film 33 is attached on the external antireflection film 31 to maintain the external appearance of the filter 30, and also protects the electromagnetic shielding conductive film 32 and the external light antireflection film 31 from external forces. do.

FIG. 4 is a plan view showing a state where the filter and the dielectric layer of the first embodiment are superimposed and mixed blue.

Referring to FIG. 4, the bus electrode portion is formed of an opaque metal material of orange (O) colored on the upper dielectric layer 28 and blue (B) colored on the external light antireflection film 31 of the filter 30. They are superimposed on each other, mixed in dark blue, and have a black color (BL).

Therefore, when the external dielectric material anti-reflective coating 31 of the upper dielectric layer 28 and the filter 30 are mixed in dark blue with black BL, the external light incident from the outside is absorbed, thereby realizing an image of the plasma display panel by external light reflection. Prevents the contrast from falling.

In addition, the external light antireflection film 31 of the upper dielectric layer 28 and the filter 30 are colored in orange (O) and blue (B), respectively, having higher brightness and saturation than black (BL), thereby increasing the front transmittance of visible light. The display quality is improved by improving the luminance.

In addition, as the external light antireflection film 31 of the filter 30 is colored blue (B) and visible light is transmitted through the filter 30, the filter 30 becomes darker blue (B) and thus the plasma When the image of the display panel is implemented, the color temperature can be further increased.

Hereinafter, a plasma display panel according to a second embodiment of the present invention will be described with reference to the accompanying drawings. However, the same reference numerals are used for the same or similar components as in the first embodiment, and repeated description thereof will be omitted.

5 is a side cross-sectional view of a plasma display panel according to a second embodiment of the present invention.

Referring to FIG. 5, the plasma display panel according to the present exemplary embodiment includes a bus in which the scan electrode 123 and the sustain electrode 126 of the display electrode 127 formed on the front substrate 20 are colored in a first color, respectively. Electrodes 121. 124 and transparent electrodes 122, 125.

As such, the bus electrodes 121 and 124 made of an opaque metal material are colored in the first color like the upper dielectric layer 28 so that the bus electrodes 121 and 124 are colored in the external light antireflection film 31 of the filter 30. It is mixed with the second color is dark blue and becomes black (BL).

In this embodiment, the bus electrodes 121 and 124 are colored with blue (B) and complementary color orange (O), which are colored on the external light antireflection film 31 of the filter 30 together with the upper dielectric layer 28. .

For example, the bus electrodes 121 and 124 may be colored purple (M) by mixing a colorant including at least one component of Mn, Cu, and Sb with an opaque metal electrode paste having excellent conductivity.

FIG. 6 is a plan view showing a state where the filter, the display electrode, and the dielectric layer of the second embodiment are mixed dark blue.

Referring to FIG. 6, the bus electrodes 121 and 124 are colored orange (O) together with the upper dielectric layer 28, and blue (B) colored on the external light antireflection film 31 of the filter 30. Navy blue mixed with black (BL).

As such, the bus electrodes 121 and 124 further have a black color (BL) to correspond to the entire area of the front substrate 20, and dark blue color mixing is performed to prevent deterioration of display quality of the plasma display panel due to external light reflection. Do it.

7 is an enlarged side cross-sectional view of a filter attached to a front substrate in a plasma display panel according to a third embodiment of the present invention.

Referring to FIG. 7, the filter 130 according to the present embodiment includes a composite layer 131 and a protective film 133 covering the same.

Therefore, the composite layer 131 is composed of a colored conductive film that can simultaneously serve as the electromagnetic wave shielding conductive film 31 and the external light antireflection film 32.

For example, the composite layer 131 may be formed by forming a transparent ITO (Indium-Tin Oxide) forming the electromagnetic wave shielding conductive layer 31 on the upper dielectric layer 28 and the bus electrodes 121 and 124. ) And blue (B) of the 2nd color of the complementary color relationship mixed with navy blue, and it can comprise.

Therefore, the composite layer 131 blocks electromagnetic waves generated when the plasma display panel is driven, and blue (B) colored therein is orange (O) colored in the upper dielectric layer 28 and the bus electrodes 121 and 124. It is mixed with dark blue to make black (BL) and absorbs external light to prevent external light reflection.

In addition, the composite layer 131 forms the above-described electromagnetic wave shielding conductive film 31 and the external light reflection preventing film 32 as a single layer, and thus, a process and cost of manufacturing the filter 130 and the plasma display panel to which the composite layer 131 is applied. Can be reduced.

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

As described above, the plasma display panel according to the present invention colors the upper dielectric layer and the external light antireflection film of the filter with complementary colors that are dark blue mixed, and the dark dielectric mixing of the upper dielectric layer and the external light antireflection film of the filter is superimposed on the external light reflection. This has the effect of preventing the display quality from being lowered.

In addition, the plasma display panel of the present invention can improve the luminance and display quality of the front transmittance of visible light by coloring the upper dielectric layer and the external light antireflection film of the filter with colors having higher brightness and saturation than black.

In addition, the plasma display panel of the present invention is to increase the anti-reflective effect of the filter by dark blue mixing with the anti-reflective film of the filter by coloring the bus electrode made of an opaque metal material in the same color as the upper dielectric layer.

In addition, by forming the electromagnetic wave shielding conductive film and the anti-reflection film of the filter as a single composite layer, it is possible to reduce the manufacturing process and cost of the filter and the plasma display panel to which the filter is applied.

Claims (12)

A rear substrate and a front substrate that face each other and are disposed to face each other; Barrier ribs disposed between the rear substrate and the front substrate to partition a plurality of discharge cells; A phosphor layer coated in each of the discharge cells; A first electrode corresponding to each of the discharge cells on the rear substrate and formed in a first direction; A second electrode formed along the second direction crossing the first direction so as to correspond to the discharge cells on the front substrate; A dielectric layer covering the second electrode on the front substrate and colored in a first color; And A filter attached to the front substrate, The filter, Electromagnetic wave shielding conductive film; And And an external anti-reflection film colored in a second color having a complementary color relationship that is blue-mixed with the first color. The method of claim 1, And the first color is orange. The method of claim 2, The dielectric layer includes at least one of Cu, Sb, and Cr and is colored orange.  The method of claim 2, And the second color is blue.  The method of claim 4, wherein The external antireflection film includes at least one of Mn, Ni, and Co and is colored blue.  The method of claim 1, And the first color is blue. The method of claim 6, And the second color is orange. The method of claim 1, The second electrode, A bus electrode extending along the partition wall; And And a transparent electrode formed to be formed in the second direction with a width from the bus electrode to a center of each of the discharge cells. The method of claim 8, The bus electrode is plasma display panel colored in the first color The method of claim 9, The bus electrode includes at least one of Cu, Sb, and Cr, and is colored orange. The method of claim 1, The filter, And the electromagnetic shielding conductive film and the external light antireflection film are formed of one composite layer. The method of claim 11,  The composite layer includes a colored ITO (Indium-Tin Oxide).

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