KR20080039713A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to prevent the reflection of external light by coloring a front substrate with complementary colors to a rear substrate. A front substrate(20) colored by a first color and a rear substrate(10) colored by a second color which is complementary color to the first color are opposite to each other. Barrier ribs(16) are interposed between the front and rear substrates to define discharge cells between the substrates. A phosphor layer(19) is formed in the discharge cells. Display electrodes and address electrodes(12) are opposite to each discharge cell between the front and rear substrates, and cross each other corresponding to each discharge cell.

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 the line II-II of FIG. 1. FIG.

3 is a plan view illustrating a state in which the front substrate and the rear substrate according to the first embodiment are stacked and mixed blue.

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

FIG. 5 is a plan view illustrating a state in which the front substrate and the rear substrate are superimposed and dark blue mixed according to the second embodiment.

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 through a front substrate of a plasma display panel from being reflected and degrading display quality.

As is well known, a plasma display panel (R), green (G), and green (V) generated by a vacuum ultra-violet (VUV) radiated from a plasma obtained through gas discharge excited a phosphor. A display device for realizing an image using visible light of blue (B).

Such a plasma display panel can realize an ultra-large screen of 60 inches or more 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 manufacturing method compared to LCD. Its simplicity makes it a popular TV and industrial flat panel display, which has strengths in terms of productivity and cost.

In a plasma display panel having a conventional three-electrode surface discharge structure, a pair of electrodes are formed on a front substrate to face each other, and a 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 plasma display panel 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 the discharge cells that are not turned on by using the storage characteristics of wall charges, and display an image by discharging the selected discharge cells.

However, while an image is displayed on the front surface of the plasma display panel, outside light is incident from the various light sources to the front surface of the plasma display panel outside the plasma display panel. As the external light incident on the front surface of the plasma display panel is reflected as described above, external light reflection is generated that is mixed with the visible light displayed by the plasma display panel, thereby degrading the display performance of the image actually expressed by the plasma display panel.

In order to reduce such external light reflection, conventionally, by using a colored partition wall to absorb incident external light, the display performance of the plasma display panel is improved by external light reflection.

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.

The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display panel which can prevent the display quality of the plasma display panel from being degraded by the reflection of external light generated from the front substrate. .

In order to achieve the above object, the plasma display panel according to the present invention has a front substrate colored in a first color, and is disposed to face each other so as to face each other, and a back substrate colored in a second color having a complementary color relationship with the first color. And a plurality of discharge cells partitioning a plurality of discharge cells between the front substrate and the rear substrate, the barrier rib formed transparently, the phosphor layer applied in each of the discharge cells, and the front substrate and the rear substrate intersecting with each other. The display electrodes may include corresponding display electrodes and address electrodes.

The first color may be blue. The front substrate includes at least one of Mn, Ni and Co and may be colored.

The second color may be orange. The back substrate comprises at least one of Cu, Sb and Cr and can be colored.

In addition, the first color may be orange and the second color may be blue.

The display electrode and the address electrode may correspond to the inside of the discharge cells.

The display electrode and the address electrode may be formed on the front substrate and the back substrate, respectively, and include a dielectric layer covering the display electrode and the address electrode, respectively, and the dielectric layer may be transparent.

The display electrode may include a pair of bus electrodes adjacent to the partition wall and formed in a first direction, and a transparent electrode formed with a width toward the center of the discharge cell from the bus electrodes.

The bus electrode may be colored in the second color. This bus electrode contains at least one of Cu, Sb and Cr and is colored orange, or at least one of Mn, Ni and Co and colored blue.

The address electrode is formed in a second direction crossing the first direction and may be colored in a second color. This address electrode contains at least one of Cu, Sb and Cr and is colored orange, or the address electrode contains at least one of Mn, Ni and Co and colored blue.

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

Referring to these examples, the plasma display panel according to the present exemplary embodiment is disposed to face each other with a predetermined distance between the front substrate 20 and the rear substrate 10.

The front substrate 20 is colored in a first color, and the back substrate 10 is colored in a second color of complementary color relationship that is dark blue mixed with the first color colored on the front substrate 20.

In the present embodiment, the first color to be colored on the front substrate 20 is made of blue (B), and the second color to be colored on the back substrate 10 is made of blue (B) and orange (O) having a complementary color relationship. Illustrate that.

The front substrate 20 may be colored blue (B) by mixing a blue colorant with a transparent substrate material such as glass constituting it. This blue coloring material may comprise at least any one of Mn, Ni and Co.

In addition, the rear substrate 10 may be colored with orange (O) by mixing an orange coloring material with the same transparent substrate material as the front substrate. This orange coloring material contains at least any one component of Cu, Sb, and Cr.

However, the present invention is not necessarily limited thereto, and the first color colored on the front substrate 20 is made of orange (O), and the second color colored on the back substrate 10 is made of blue (B). You may lose.

In addition to the above-described blue (B) and orange (O), the first color to be colored is blue green (C), purple (M), and yellow (Y) which are the primary colors (three primary colors) of the navy blue mixture. ) May be of any color.

In this case, the second color to be colored on the back substrate 10 has a complementary color relationship with the primary index blue green (C), purple (M), and yellow (Y) of the navy blue mixture, respectively, and the navy blue mixed primary colors are mixed. The navy blue mixture is made of any one of the secondary colors.

Accordingly, the navy blue mixed secondary colors colored on the back substrate 10 are red (R) in complementary color relations mixed with blue green (C) and navy blue mixed, green (G) and yellow ( Y) and navy blue may be composed of indigo blue in a complementary color relationship BP.

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. The indigo blue (BP) is the secondary color obtained by mixing the primary index purple (M) and blue green (C).

Of course, the front substrate 20 is colored in any one of the green (G), navy blue (BP), red (R) of the navy blue mixed secondary colors, the back substrate 10 is the navy blue mixed secondary colors and complementary colors It is natural that any of the dark blue mixed primary index blue green (C), purple (M), and yellow (Y) in relation can be colored.

In addition, a plurality of discharge cells 18 are partitioned by the partition wall 16 in the space between the rear substrate 10 and the front substrate 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. Thus, 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 various shapes, such as a stripe type or a ulta type pattern, in addition to the grid pattern described above. Of course.

In addition, the partition wall 16 is made transparent so that the blue (B) of the front substrate 20 and the orange (O) of the rear substrate 10 are dark blue mixed to give a black (BL). Therefore, the partition wall 16 is preferably made of a transparent dielectric material is not mixed with the coloring material.

The discharge cells 18, which are divided by the partition 16, are filled with discharge gas (eg, mixed gas including neon and xenon) 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 by applying a phosphor face of red (R), green (G), and blue (B) in the discharge cells 18. Here, the phosphor constituting the phosphor layer 19 is preferably formed of an opaque reflective phosphor so as to prevent the halation phenomenon in which visible light generated in the discharge cells 18 adjacent to each other by the transparent barrier rib 16 spreads. Do.

The phosphor layer 19 is formed by coating 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. ) And green (G) and blue (B) phosphors are repeatedly applied.

In order to implement an image by gas discharge, the plasma display panel corresponds to all of the discharge cells 18 on the rear substrate 10 and the address electrode 12 is formed along the first direction, and is formed on the front substrate 20. A pair of display electrodes 27 are formed along the second direction crossing the address electrodes 12.

The address electrode 12 and the display electrode 17 are discharge cells partitioned by the partition wall 16 such that the front substrate 20 and the back substrate 10 are mixed blue with each other through the transparent partition wall 16 ( 18) It is preferably formed corresponding to the inner side.

The lower dielectric layer 14 covering the address electrode 12 is formed on the back substrate 10 provided with the address electrode 12 to prevent damage during plasma discharge and to facilitate charge accumulation. The transparent partition 16 described above 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.

An upper dielectric layer 28 is formed to cover the scan electrode 23 and the sustain electrode 26, and the upper dielectric layer 28 is formed on the upper dielectric layer 28 to prevent damage due to exposure to plasma discharge occurring in the discharge cell 18. The protective layer 29 may be formed.

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 to lower the discharge start voltage.

The lower dielectric layer 14 and the upper dielectric layer 28 are transparently formed such that blue (B) and orange (O) colored on the front substrate 20 and the rear substrate 10 are mixed blue by the transparent partition 16. . The lower dielectric layer 14 and the upper dielectric layer 28 are preferably made of an uncolored transparent dielectric.

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 have a stripe pattern on the front substrate 20 so as to correspond to discharge cells 18R, 18G, and 18B of red (R), green (G), and blue (B) in a second direction. It is formed extending in the form, it is made of indium-tin oxide (ITO) that can prevent the visible light is blocked.

However, the present invention is not necessarily limited thereto, and the transparent electrodes 22 and 25 correspond to the red, green, and blue discharge cells 18R, 18G, and 18B, respectively, and protrude from the bus electrodes 21 and 24 individually. It can be natural.

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

The bus electrodes 21 and 24 are disposed on both horizontal partition walls 16a disposed 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 install more adjacently.

Therefore, after selecting the discharge cell 18 to be turned on by the address discharge due to the interaction of the address electrode 12 and the scan electrode 23, the scan electrode 23 and the sustain electrode arranged in the selected discharge cell 18 are selected. By the interaction of 26, an image is realized with visible light generated by sustain discharge.

3 is a plan view illustrating a state in which the front substrate and the rear substrate are stacked and mixed in navy blue.

Referring to FIG. 3, blue (B) colored on the front substrate 20 and orange (O) colored on the back substrate 10 are opaque bus electrodes 21 and 24 and the phosphor layer 19. ), And except for the portion of the address electrode 12, are superimposed on each other through the transparent partition 16 and are mixed in dark blue to give a black color BL.

Accordingly, the front substrate 20 and the rear substrate 10 absorb the external light incident from the outside in the partition 16 where the blue substrate BL is dark blue mixed, and the bright room of the plasma display panel is reflected by the external light reflection. The contrast ratio can be prevented from being lowered.

Table 1 shows the conventional plasma display panel applied to the front substrate 20 and the back substrate 10 as a transparent substrate, and from the plasma display panel of the present embodiment in which a colored substrate is applied to prevent reflection of external light due to dark blue mixing. The experimental results obtained by measuring the bright room contrast ratio and the external light reflection luminance are shown.

As shown in Table 1, in the plasma display panel to which the colored substrate of the present embodiment is applied, external light is prevented from being reflected by dark-color mixing of the colored front substrate 20 and the back substrate 10, thereby applying a conventional transparent substrate. It can be seen that the external light reflection luminance is lowered and the bright room contrast ratio is improved as compared with the plasma display panel.

In addition, in the plasma display panel of the present embodiment, the front substrate 20 through which the visible light generated from the discharge cells 18 is transmitted is colored with blue (B), which is brighter and more saturated than black (BL). The luminance of the plasma display panel may be further improved by increasing the front transmittance of the plasma display panel.

Furthermore, as the front substrate 20 is colored blue (B), the visible light generated in the discharge cells 18 becomes darker blue (B) in the course of sequentially passing through the filter 30, thereby displaying a plasma display. The color temperature can be increased when the panel is imaged.

Hereinafter, a plasma display panel according to a second exemplary embodiment of the present invention will be described with reference to the accompanying drawings. However, the same reference numerals are used for the same parts as those in the first embodiment described above, and repeated descriptions thereof will be omitted.

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

Referring to FIG. 4, in the plasma display panel of the present embodiment, the bus electrodes 121 and 124 and the address electrode 112 which are opaque compared with the first embodiment have the front substrate (10) together with the back substrate 10. 20) and the second color of the complementary color relationship that is dark blue mixed with the first color that is colored.

Here, the first color to be colored on the front substrate 20 is blue (B), and the second color to which the bus electrodes 121 and 124 and the address electrode 112 are colored together with the back substrate 10 is orange (O). For example).

Accordingly, the bus electrodes 121 and 124 and the address electrode 112 each include at least one of Cu, Sb, and Cr, and may be colored orange.

However, when the first color colored on the front substrate 20 is orange (O), the second color colored on the bus electrodes 121 and 124 and the address electrode 112 may be blue (B). Of course. In this case, the bus electrodes 121 and 124 and the address electrode 112 may include at least one of Mn, Ni, and Co, and may be colored blue (B).

FIG. 5 is a plan view illustrating a state in which the front substrate and the rear substrate are superimposed and dark blue mixed according to the second embodiment.

Referring to FIG. 5, the blue (B) colored on the front substrate 20 and the orange (O) colored on the bus electrodes 121 and 124 are superimposed and dark blue mixed to give a black (BL).

Then, the blue (B) colored on the front substrate 20 and the orange colored on the address electrode 112 and the back substrate 10 are superimposed on each other through the transparent partition wall 16 and are mixed in dark blue to obtain black (BL). Will be visible.

In this manner, the bus electrodes 121 and 124 and the address electrodes 112 which are opaque are colored in the colors of the front substrate 10 and the complementary colors of the color combinations that are dark blue mixed, thereby absorbing external light by dark blue mixing. To increase the display quality.

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 has an effect of coloring the front substrate and the back substrate with colors having complementary colors and preventing external light from being reflected by the blue color mixing thereof.

In addition, the plasma display panel of the present invention has the effect of increasing the brightness and saturation of the visible light by increasing the brightness and saturation of the color to be colored on the front substrate.

In addition, it is possible to reduce the manufacturing process and cost of the plasma display panel by removing the black stripe applied to prevent the reflection of external light.

Claims (16)

A front substrate colored in a first color; A rear substrate disposed to face the front substrate so as to face each other and colored in a second color having a complementary color relationship with the first color; A partition wall partitioning the plurality of discharge cells between the front substrate and the rear substrate and being transparent; A phosphor layer coated in each of the discharge cells; And a display electrode and an address electrode which cross each other between the front substrate and the rear substrate and correspond to the discharge cells. The method of claim 1, And the first color is blue.  The method of claim 2, Wherein the front substrate comprises at least one of Mn, Ni, and Co and is colored. The method of claim 2, And the second color is orange. The method of claim 4, wherein The rear substrate includes at least one of Cu, Sb, and Cr and is colored with a plasma display panel. The method of claim 1, And the first color is orange. The method of claim 6, And the second color is blue. The method of claim 1, And the display electrode and the address electrode are positioned inside the discharge cells. The method of claim 8, The display electrode and the address electrode are formed on the front substrate and the back substrate, respectively A dielectric layer covering each of the display electrode and the address electrode; And the dielectric layer is transparent. The method of claim 9, The display electrode, A pair of bus electrodes adjacent to the partition wall and formed in a first direction; and And a transparent electrode formed to have a width extending from the bus electrodes toward a center of the discharge cell. The method of claim 10, And the bus electrode is colored with the second color. The method of claim 11, The bus electrode includes at least one of Cu, Sb, and Cr, and is colored orange. The method of claim 11, The bus electrode includes at least one of Mn, Ni, and Co and is colored blue. The method of claim 10, And the address electrode is formed in a second direction crossing the first direction and colored in the second color. The method of claim 14, The address electrode includes at least one of Cu, Sb, and Cr, and is colored orange. The method of claim 14, And the address electrode includes at least one of Mn, Ni, and Co and is colored blue.

Images