KR20040061893A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to correct the body color of the plasma display panel by using a film having a color correction function. CONSTITUTION: A plasma display panel comprises a panel(32); and a film(71) formed on the panel, and which has a color correction function. The film with the color correction function contains a material selected from a group consisting of titanium oxide, cadmium yellow, lead yellow, molybdate orange, cadmium red, ferric oxide, copper phthalocyanine green, copper phthalocyanine blue, carbon black, phthalocyanine green, cobalt blue, cobalt bio red, mineral bio red, chromic oxide, carbon, phthalocyanine blue, aniline black, azo pigment, azo dye, azo compound, azo basic oxide, basic pigment, azo methine pigment, pigment containing metal and metal oxide, aniline formaldehyde resin, aryl group, and resin obtained from an arylation.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

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 correcting body color of the plasma display panel.

Plasma Display Panel (hereinafter referred to as "PDP") is red, green, and blue by 147nm ultraviolet rays generated when discharge of inert gas such as He + Xe, Ne + Xe or He + Ne + Xe. By emitting the light emitting phosphor, an image including a character or a graphic is displayed. Such a PDP is not only thin and easy to enlarge, but also greatly improved in quality due to recent technology development. In particular, the three-electrode AC surface discharge type PDP has advantages of low voltage driving and long life because wall charges are accumulated on the surface during discharge and protect the electrodes from sputtering caused by the discharge.

1 is a perspective view showing a discharge cell structure of a conventional plasma display panel.

Referring to FIG. 1, a discharge cell of a three-electrode AC surface discharge type PDP includes a scan electrode Y and a sustain electrode Z formed on the upper substrate 10, and an address electrode X formed on the lower substrate 18. It is provided. Each of the scan electrode Y and the sustain electrode Z has a line width smaller than the line widths of the transparent electrodes 12Y and 12Z and the transparent electrodes 12Y and 12Z and is formed at one edge of the transparent electrode. 13Z).

The transparent electrodes 12Y and 12Z are usually formed on the upper substrate 10 by indium tin oxide (ITO). The metal bus electrodes 13Y and 13Z are usually formed of metals such as chromium (Cr) and formed on the transparent electrodes 12Y and 12Z to reduce voltage drop caused by the transparent electrodes 12Y and 12Z having high resistance. The upper dielectric layer 14 and the passivation layer 16 are stacked on the upper substrate 10 having the scan electrode Y and the sustain electrode Z side by side. In the upper dielectric layer 14, wall charges generated during plasma discharge are accumulated. The protective layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. As the protective film 16, magnesium oxide (MgO) is usually used.

The lower dielectric layer 22 and the partition wall 24 are formed on the lower substrate 18 on which the address electrode X is formed, and the phosphor layer 26 is coated on the surfaces of the lower dielectric layer 22 and the partition wall 24. The address electrode X is formed in the direction crossing the scan electrode Y and the sustain electrode Z. The partition wall 24 is formed in a stripe or lattice form to prevent ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells. The phosphor layer 26 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert mixed gas is injected into the discharge space provided between the upper and lower substrates 10 and 18 and the partition wall 24.

The PDP is time-divisionally driven by dividing one frame into several subfields having different number of emission times in order to implement grayscale of an image. Each subfield is divided into an initialization period for initializing the full screen, an address period for selecting a scan line and selecting a cell in the selected scan line, and a sustain period for implementing gray levels according to the number of discharges.

For example, when the image is to be displayed in 256 gray levels, as shown in FIG. 2, the frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8. Each of the eight subfields SF1 to SF8 is divided into an initialization period, an address period, and a sustain period as described above. The initialization period and the address period of each subfield are the same for each subfield, while the sustain period is increased at a rate of 2 ⁿ (n = 0,1,2,3,4,5,6,7) in each subfield. .

In the PDP driven as described above, a front filter is installed on the upper substrate 10 to shield electromagnetic waves and prevent reflection of external light.

3 is a cross-sectional view schematically illustrating one side of a conventional plasma display panel.

Referring to FIG. 3, a conventional PDP includes a panel 32 formed by joining an upper substrate 10 and a lower substrate 18, a front filter 30 installed on a front surface of the panel 32, and a panel 32. Heat sink 34 is installed on the rear of the), the printed circuit board 36 is installed to be attached to the heat sink 34, the back cover 38 formed to surround the back of the PDP, the front filter 30 and The filter support part 40 for connecting the bag cover 38 and the support member 42 provided between the front filter 30 and the bag cover 38 so as to surround the filter support part 40 are provided.

The printed circuit board 36 supplies a driving signal to the electrodes of the panel 32. To this end, the printed circuit board 36 includes various driving units not shown. The panel 32 displays a predetermined image in response to a drive signal supplied from the printed circuit board 36. The heat sink 34 dissipates heat generated from the panel 32 and the printed circuit board 36. The back cover 38 protects the panel 32 from external shocks and blocks electromagnetic waves emitted to the rear surface (hereinafter referred to as "EMI").

The filter support 40 electrically connects the front filter 30 to the bag cover 38. Such a filter support 40 grounds the front filter 30 to the bag cover 38 and prevents EMI from being emitted to the side. The support member 42 supports the filter support 40, the front filter 30, the bag cover 38, and the like.

The front filter 30 shields EMI and prevents reflection of external light. To this end, the front filter 30 is a non-reflective film 50, optical film 52, glass 54, EMI shielding film 56 and near infrared rays (hereinafter referred to as "NIR") as shown in FIG. The shielding film 58 is provided. Here, an adhesive layer is actually formed between the films 50, 52, 54, 56, and 58 of the front filter 30 to bond the films 50, 52, 54, 56, and 58. In general, the optical film 52 is formed by inserting a specific material into the adhesive layer. Then, the structure of the front filter 30 is slightly changed depending on the manufacturer. In the present disclosure, for convenience of description, the adhesive layer is not illustrated, and the optical characteristic film 52 is represented as a specific layer, and the structure of the front filter 30 which is generally used is given as an example.

The antireflection coating 50 prevents light incident from the outside from being reflected back to the outside to improve the contrast of the PDP. The antireflective film 50 is formed on the surface of the front filter 30. Meanwhile, the antireflection film 50 may be further formed on the rear surface of the front filter 30. The optical characteristic film 52 lowers the luminance of red (R) and green (G) among the light incident from the panel 32 and improves the optical characteristic of the PDP by increasing the luminance of blue (B).

The glass 54 prevents the front filter 30 from being damaged from an external impact. In other words, the glass 54 supports the front filter 30 to prevent the front filter 30 from being damaged from external impact. The EMI shielding film 56 shields the EMI to prevent the EMI incident from the panel 32 from being emitted to the outside. The NIR shielding layer 58 shields the NIR emitted from the panel 32 to prevent the NIR above the reference from being emitted to the outside so that devices that transmit signals using IR, such as a remote controller, can normally transmit the signal. Meanwhile, the EMI shielding film 56 and the NIR shielding film 58 may be composed of one layer.

The front filter 30 is electrically connected to the bag cover 38 through the filter support 40 as shown in FIG. 5. In detail, the filter support 40 is connected to the rear surface of the front filter 30 at one end of the front filter 30. At this time, the filter support 40 is electrically connected to at least one of the EMI shielding film 56 and the NIR shielding film 58. That is, the filter support 40 connects the front filter 30 to the bag cover 38 to shield EMI and / or NIR.

This conventional front filter 30 is used for the glass 54 to prevent the front filter 30 from being damaged by the impact from the outside. However, when the glass 54 is inserted into the front filter 30 in this way, the thickness of the front filter 30 becomes thick. In addition, when the glass 54 is inserted into the front filter 30, the weight becomes heavy and the manufacturing cost increases.

Therefore, the film type front filter 60 from which the glass 54 was removed as shown in FIG. 6 has been proposed. The film front filter 60 includes an antireflection film 62, an optical characteristic film 64, an EMI shielding film 66, and an NIR shielding film 68. Here, an adhesive layer is formed between the films 62, 64, 66, and 68 of the film front filter 60 to bond the films 62, 64, 66, and 68. In general, the optical characteristic film 64 is formed by inserting a specific material into the adhesive layer. In addition, the structure of the film-type front filter 60 is slightly changed depending on the company used. For convenience of description, the adhesive layer is not illustrated and the optical characteristic film 64 is represented as a specific layer.

The antireflective film 62 is formed on the surface of the film type front filter 60 to prevent the light incident from the outside from being reflected back to the outside. The antireflection film 62 may be further formed on the rear surface of the film type front filter 60. The optical characteristic film 64 lowers the luminance of red (R) and green (G) among the light incident from the panel 32 and increases the luminance of blue (B) to improve the optical characteristics of the PDP.

The EMI shielding film 66 shields the EMI to prevent the EMI incident from the panel 32 from being emitted to the outside. The EMI shielding film 66 may be formed of one layer with the NIR shielding film 68 to be described later.

The NIR shielding film 66 shields the NIR incident from the panel 32. Here, the NIR belongs to a wavelength range of 700 to 1200 nm, and is generated by Xe which emits rays of 800 to 1000 nm during discharge of a mixed gas filled in the panel of the PDP. When such an NIR is emitted to the outside, a signal of a device such as a remote controller that transmits a signal using the IR cannot be normally transmitted to the PDP. That is, the emission of the NIR will cause the remote controller to malfunction. As a result, the NIR shielding film 68 prevents the NIR above the reference from being emitted to the outside by using a near-infrared absorbing dye so that signals transmitted from the remote controller or the like to the panel 32 can be normally transmitted.

Such a film-type front filter 60 is lighter in weight and thinner than the front filter 30 including the glass 54. In addition, the film type front filter 60 can reduce the manufacturing cost compared to the front filter 30 including the glass 54. However, the front film 30 including the current film type front filter 60 and glass 30 can be reduced. PDP to which the PDP is attached or installed will be referred to as the body color (the color of the screen displayed when there is no power supply to the PDP: body color hereinafter). It appears as bluish green system. That is, the color of bluish green color is obtained by the front filter assembled with the upper substrate of the panel 32 which is white. At present, the trend is to build the image of high-end brand by showing the body color of PDP in black system.

Accordingly, an object of the present invention is to provide a plasma display panel capable of correcting the body color of the plasma display panel.

1 is a perspective view showing a discharge cell structure of a conventional three-electrode AC surface discharge type plasma display panel.

2 is a diagram illustrating a frame for expressing 256 gray levels in a typical plasma display panel.

3 is a cross-sectional view schematically showing one side of a conventional plasma display.

4 is a cross-sectional view schematically showing the front filter shown in FIG.

5 is a view showing in detail the grounding process of the front filter and the filter support shown in FIG.

6 is a sectional view schematically showing a film type front filter.

7 is a cross-sectional view showing one side of a plasma display panel according to a first embodiment of the present invention.

8 is a sectional view of one side of a plasma display panel according to a second embodiment of the present invention;

<Description of Symbols for Main Parts of Drawings>

10,80: upper substrate 12Y, 12Z: transparent electrode

13Y, 13Z: bus electrode 14, 22: dielectric layer

16: protective film 18: lower substrate

24: partition 26: phosphor layer

30,60 Front filter 32 Panel

34: heat sink 36: printed circuit board

38: back cover 40: filter support

42: support member 50,62: antireflective film

52,64: optical film 54: glass

56,66 EMI shielding film 58,68 NIR shielding film

71: color correction film or coating film

In order to achieve the above object, the plasma display panel according to an embodiment of the present invention is characterized in that it comprises a panel and a layer having a color correction function on the front of the panel.

The color correction material added to the layer having the color correction function is titanium oxide (rutile), titanium oxide (anataze), cadmium yellow, lead, molybdate orange, cadmium red, iron oxide, 銅 phthalocyanine green, 銅 phthalocyanine blue , Navy Blue, Carbon Black, Royal Blue, Phthalocyanine Green, Cobalt Blue, Cobalt Bio Red, Mineral Bio Red, Chromium Oxide, Sren Blue, Card Mired, Carbon 1, Carbon 2, Card Miero, Phthalocyanine Blue, Aniline Black, Azo Pigment, Azo Dye, Azo Compound, Azo Basic Oxide, Basic Pigment ( Basic Pigment), metal complex salt, Azo Methine Pigment, pigments including metals and metal oxides, aniline formaldehyde resins, aryl group (Aryl Group), at least one material selected from the resin by the arylation reaction (Arylation) It is characterized in that it comprises a compound of at least two substances.

The metals and metal oxides include Nd ₂ O ₃ , Nd-based, Fe and iron oxides, Ag and silver oxides, Ni and nickel oxides, Cr and chromium oxide, and at least one material selected from the group consisting of at least two materials It features.

In the plasma display panel according to the embodiment of the present invention, the layer having a color correction function is an upper substrate of the panel.

The material added to the upper substrate having the color correction function is an aromatic group, -SOx, -OR, -NHx, -NH ₂ , -NHR, -OH, halogen atom, cyano, nitro, aliphatic group,- CO-R, -COO-R, -OCO-R, -NR, -NH-R, -NH-CO-R, -CO-NR, -SR, -SO ₂ -OR, -NH-SO ₂ -R , -NH-CO-OR, -SO ₂ -NR, 5-cyclo (Cyclo), 6-cyclo, carboxyl, alkyl, benzyl, methyl, ethyl, propyl, isopropyl, butyl, t-butyl, Cyclo group, Nd ₂ O _{3 It} is characterized in that it comprises a compound of at least one material selected from Co, Fe-based, Ag-based or at least two materials selected.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 7 to 8.

7 is a schematic cross-sectional view of a plasma display panel according to a first embodiment of the present invention.

Referring to FIG. 7, the PDP according to the first embodiment of the present invention includes a panel 32 and a color correction film or color correction coating film 71 formed on the front surface of the panel 32. Here, an adhesive layer is formed between the color correction film or the color correction coating film 71 and the panel 32 to bond the two layers.

The color correction film or the color correction coating film 71 is laminated on the front of the panel 32 in a film form or formed of a polymer material to which an organic / inorganic pigment, an organic / inorganic dye, or the like is added or coated on the front of the panel 32. Can be formed. At this time, examples of color correction organic / inorganic pigments and organic / inorganic dyes include titanium oxide (rutile), titanium oxide (anata), cadmium yellow, lead, molybdate orange, cadmium red, iron oxide, and phthalocyanine green,銅 Phthalocyanine Blue, Ultramarine Blue, Carbon Black, Royal Blue, Phthalocyanine Green, Cobalt Blue, Cobalt Bio Red, Mineral Bio Red, Chromium Oxide, Sren Blue, Card Mirede, Carbon 1, Carbon 2, Card Miero, Phthalocyanine Blue, Aniline Black, Azo Pigment, Azo Dye, Azo Compound, Azo Basic Oxide, Basic pigments, metal complex salts, Azo Methine Pigments, pigments including metals and metal oxides, aniline formaldehyde resins, Aryl Group, resins by arylation reactions, and the like. Examples of metals and metal oxides include Nd ₂ O ₃ , Nd-based Fe and iron oxides, Ag and silver oxides, Ni and nickel oxides, Cr and chromium oxides, other metals and metal oxides, and the like.

Films and coating films containing such dyes and pigments are subjected to color correction by adding the red and blue color to the blue green color of the PDP itself, so that the body color of the PDP becomes black. The color correction film and the coating film increase the blue luminance by increasing the transmittance of blue light emitted from the blue phosphor of the PDP according to the dyes and pigments added thereto, and decrease the transmittance of red and infrared rays corresponding to the region of 600 to 1000 nm to reduce the color temperature of the PDP. In addition, it can also serve as an auxiliary function for increasing contrast and near-infrared shielding.

8 is a cross-sectional view schematically illustrating a plasma display panel according to a second embodiment of the present invention.

Referring to FIG. 8, the PDP according to the second embodiment of the present invention includes a panel employing an upper substrate 80 having a function of color correction.

The upper substrate 80 having a color correction function may be formed by adding an organic substance or an inorganic substance to the upper substrate forming material itself. At this time, examples of color correction organic and inorganic materials include Aromatic group, -SOx, -OR, -NHx, -NH ₂ , -NHR, -OH, halogen atom, cyano, nitro, aliphatic group, -CO-R,- COO-R, -OCO-R, -NR, -NH-R, -NH-CO-R, -CO-NR, -SR, -SO ₂ -OR, -NH-SO ₂ -R, -NH-CO -OR, -SO ₂ -NR, 5-cyclo group, 6-cyclo group, carboxyl group, alkyl group, benzyl group, methyl, ethyl, propyl, isopropyl, butyl, t-butyl, cyclo group and the like Nd ₂ O ₃ , Co-based, Fe-based, Ag-based, and other metal oxides.

The upper substrate 80 including the organic and inorganic materials has a color control function along with a front filter that performs electromagnetic shielding and near infrared absorption. As a result, the body color of the PDP, which is a conventional bluish green series, may be black. In addition, the upper substrate having the color correction function increases the blue luminance by increasing the transmittance of blue light emitted from the blue phosphor of the PDP according to the organic and inorganic substances added thereto, and increases the transmittance of red and infrared rays corresponding to the region of 600 to 1000 nm. Lowering improves the color temperature of the PDP, and can also serve as a secondary function for increasing contrast.

As described above, the plasma display panel according to the present invention may have a film or coating film having a color correction function or employ an upper substrate having a color correction function so that the body color of the PDP becomes black. This makes it possible to enhance the brand image of the PDP.

In addition, by adjusting the organic and inorganic materials added to the film, coating film or upper substrate having a color correction function to increase the blue brightness of the PDP and to reduce the transmittance of red and infrared rays corresponding to the region of 600 ~ 1000nm to improve the color temperature of the PDP It can also perform the auxiliary function of the front filter such as increasing the contrast.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (8)

Panel, And a layer having a color correction function on the front surface of the panel. The method of claim 1, The color correction material added to the layer having the color correction function Titanium oxide (rutile type), titanium oxide (anata type), cadmium yellow, lead, molybdate orange, cadmium red, iron oxide, phthalocyanine green, phthalocyanine blue, ultramarine blue, carbon black, blue, phthalocyanine green , Cobalt Blue, Cobalt Bio Red, Mineral Bio Red, Chromium Oxide, Slene Blue, Card Mired, Carbon 1, Carbon 2, Card Miero, Phthalocyanine Blue, Aniline Black, Azo Pigment, Azo Dye, Azo Compound, Azo Basic Oxide, Basic Pigment, Metal Complex, Azo Methine Pigment, Metals and Metals A plasma display panel comprising at least one material selected from a pigment containing an oxide, an aniline formaldehyde resin, an aryl group, and an resin by an arylation reaction. The method of claim 2, The color correction material A plasma display panel comprising a compound of at least two materials selected from the above materials. The method of claim 2, The metal and metal oxide A plasma display panel comprising at least one material selected from Nd ₂ O ₃ , Nd-based, Fe, iron oxide, Ag, silver oxide, Ni, nickel oxide, Cr, and chromium oxide. The method of claim 4, wherein The metal and metal oxide Plasma display panel comprising a compound of at least two materials selected from the above materials. The method of claim 1, And the layer having the color correction function is an upper substrate of the panel. The method of claim 6, The material added to the upper substrate having the color correction function, Aromatic group, -SOx, -OR, -NHx, -NH ₂ , -NHR, -OH, halogen atom, cyano, nitro, aliphatic group, -CO-R, -COO-R, -OCO-R , -NR, -NH-R, -NH-CO-R, -CO-NR, -SR, -SO ₂ -OR, -NH-SO ₂ -R, -NH-CO-OR, -SO ₂ -NR , 5-cyclo, 6-cyclo, carboxyl, alkyl, benzyl, methyl, ethyl, propyl, isopropyl, butyl, t-butyl, cyclo, Nd ₂ O ₃ , Co-based, Fe-based And Ag based at least one material selected from the plasma display panel. The method of claim 7, wherein The material added to the upper substrate having the color correction function, Plasma display panel comprising a compound of at least two materials selected from the above materials.