• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel and a method for manufacturing the same, which reduce the exhaust time and reduce the phosphor deterioration by applying only a discharge region in which a pair of sustain electrodes are formed in a line shape. A plasma display panel according to the present invention includes electrodes formed on a substrate to cause discharge, a dielectric layer formed on the substrate to cover the electrodes, and a protective layer formed only on a discharge region by the electrodes on the dielectric layer. do. According to the present invention, by forming the protective film deposited on the upper surface of the PDP by patterning only in the discharge region, it is possible to reduce the contamination of the magnesium oxide to be removed during the upper / lower plate sealed exhaust, that is, the contamination source adsorbed on the protective film.
    公开号:KR20030046062A
    申请号:KR1020010076381
    申请日:2001-12-04
    公开日:2003-06-12
    发明作者:이성하
    申请人:엘지전자 주식회사；
    IPC主号:
    专利说明:

    Plasma Display Panel and Fabrication Method Thereof
    [12] 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 and a method of manufacturing the same, which can reduce exhaust time and reduce phosphor deterioration by applying only a discharge region in which a sustain electrode pair is formed in a line on a magnesium oxide protective film. will be.
    [13] As the development and spread of information processing systems increase, the importance of display devices as visual information transmission means is increasing. In particular, the conventional CRT (Cathod Ray Tube) has various problems such as large size, high operating voltage, and display distortion, so that the recent trend of increasing screen size and flatness is not suitable. Planar displays are being actively researched.
    [14] Recently, Liquid Crystal Display (hereinafter referred to as "LCD"), Field Emission Display (hereinafter referred to as "FED") and Plasma Display Panel (hereinafter referred to as "PDP") Flat display devices such as the like have been actively developed. The PDP emits a phosphor by ultraviolet rays of 147 nm generated when the inert mixed gas such as He + Xe, Ne + Xe and He + Ne + Xe discharges to display an image including characters or graphics. Such a PDP is not only thin and large in size, but also simple in structure, and has high luminance and luminous efficiency compared with other flat panel displays. Due to these advantages, research on PDP is being actively conducted. 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.
    [15] 1 and 2 illustrate cross-sectional views of discharge cells of a conventional three-electrode alternating current PDP. The discharge cell includes an upper substrate 1 on which sustain electrode pairs 2 are formed, and a lower substrate 6 on which address electrodes 7 are formed. The upper substrate 1 and the lower substrate 6 are spaced in parallel with the partition 8 therebetween. A mixed gas such as Ne + Xe, He + Xe, He + Ne + Xe is injected into the discharge space provided by the upper substrate 1, the lower substrate 6, and the partition wall 8. One of the sustain electrode pairs 2 causes an opposite discharge with the address electrode 7 in response to the scan voltage pulse supplied in the address period and a surface discharge with the adjacent sustain electrode 2 in response to the sustain pulse supplied in the sustain period. It is used as a scan / maintenance electrode which causes The sustain electrode pair 2 used as the scan / sustain electrode is used as a common sustain electrode to which a sustain pulse is commonly supplied. The upper dielectric layer 4 and the passivation layer 5 are stacked on the upper substrate 1 on which the sustain electrode pairs 2 are formed. The upper dielectric layer 4 serves to limit the plasma discharge current and to accumulate wall charges during discharge. The protective film 5 prevents damage to the upper dielectric layer 4 due to sputtering generated during plasma discharge and increases the emission efficiency of secondary electrons. The protective film 5 is usually made of magnesium oxide (MgO). The address electrode 7 is formed to cross the sustain electrode pair 2 and is supplied with a data signal for selecting cells to be displayed. A lower dielectric layer is formed on the lower substrate 6 on which the address electrode 7 is formed. On the lower dielectric layer, barrier ribs 8 for dividing the discharge space extend vertically. On the surfaces of the lower dielectric layer and the partition wall 8 are phosphors 9 which are excited by vacuum ultraviolet rays and generate red, green or blue visible light.
    [16] The PDP discharge cell of this structure is selected by the counter discharge between the address electrode 7 and the sustain electrode 2, and then sustains the discharge by the surface discharge between the sustain electrode pair 2. In addition, the phosphor 9 emits light by ultraviolet rays generated during sustain discharge, and visible light is emitted to the outside of the cell. By adjusting the discharge sustain period of the cell, that is, the number of sustain discharges according to the video data, gray scale required for displaying an image is realized.
    [17] In addition, the sustain electrode pair 2 is formed on the upper substrate by a method such as sputtering or vacuum deposition, and the metal bus electrode 3 made of Cr / Cu / Cr is mainly sputtered on the sustain electrode pair 2. Form by the way. The upper dielectric layer 4 is applied by the screen printing method on the upper substrate 1 on which the sustain electrode pairs 2 and the bus electrodes 3 are formed, and the protective film 5 is formed on the surface of the dielectric layer 4. . At this time, magnesium oxide (MgO) is deposited to about 5000 kPa to form a protective film.
    [18] At this time, the magnesium oxide (MgO) layer, which is a protective film, is mainly composed of one layer, and is an important film mainly affecting voltage and luminance characteristics such as the discharge voltage and the discharge sustain voltage of the PDP. It is.
    [19] However, magnesium (MgO) is likely to adsorb the moisture (H 2 0) to oxidation in the atmosphere. Over time, the adsorbed moisture diffuses into the membrane, and partly due to chemical reactions, Mg (OH) 2 is formed. This moisture (H 2 0) can be removed only when the magnesium oxide (MgO), that is, the protective film surface is 350 ℃ or more.
    [20] As described above, in the manufacture of a general AC PDP, moisture (H 2 O) contained in magnesium oxide is removed, that is, the electrode surface (ie, the insulating layer) is homogenized before sealing the panel to obtain good discharge characteristics and reduce driving voltage. Hot vacuum evacuation for about 24 hours is performed.
    [21] The high temperature vacuum exhaust process is problematic in that the light emitting efficiency of the phosphor is lowered because the phosphor is exposed for a long time in a high temperature moisture (H 2 O) atmosphere, in addition to a long time problem.
    [22] Accordingly, an object of the present invention is to reduce the surface area of the protective film deposited on the panel by reducing the deposition of the protective film in the non-discharge area in the manufacture of the PDP, and to reduce the pollution source to be removed during sealing and exhausting of the upper and lower plates. It is to provide a manufacturing method.
    [1] 1 is a view for explaining a conventional surface discharge AC plasma display panel.
    [2] 2 is a cross-sectional view showing a unit discharge cell of a conventional AC plasma display panel.
    [3] 3 is a cross-sectional view of a top plate of a discharge cell of the plasma display panel according to the embodiment of the present invention;
    [4] 4 is a plan view of the top plate shown in FIG.
    [5] 5A through 5E are diagrams sequentially illustrating a method of manufacturing a top plate of a plasma display panel according to an exemplary embodiment of the present invention.
    [6] <Description of the symbols for the main parts of the drawings>
    [7] 1,11: upper substrate 2,12: sustaining electrode pair
    [8] 3,13 bus pair 4,14 dielectric layer
    [9] 5,15: protective film 6: lower substrate
    [10] 7,17: address electrode 8,18: partition wall
    [11] 9: phosphor 16: pattern mask
    [23] In order to achieve the above object, a plasma display panel according to the present invention includes electrodes formed on a substrate to generate a discharge, a dielectric layer formed on the substrate to cover the electrodes, and a discharge by the electrodes on the dielectric layer. It has a protective layer formed only in a region.
    [24] The method of manufacturing a plasma display panel according to the present invention comprises the steps of forming electrode pairs that are formed in a predetermined pattern including a metal material on a substrate to cause discharge, forming and baking a dielectric layer on the entire surface of the substrate, and And forming a protective layer so as to cover only a region in which discharge occurs by the electrode pairs.
    [25] The forming of the protective layer in the present invention includes arranging a mask having an open discharge region on the substrate, and depositing magnesium oxide on the substrate through the mask. It is done.
    [26] 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.
    [27] Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 3 to 5E.
    [28] 3 is a cross-sectional view of the top plate of the discharge cell of the plasma display panel according to an embodiment of the present invention, Figure 4 is a view showing a plan view of the top plate shown in FIG.
    [29] Referring to FIGS. 3 and 4, the upper substrate 11 of the upper surface of the PDP is paired with one pixel and has a scan electrode 12a as a discharge sustain electrode pair 12 for maintaining light emission of pixels in mutual discharge. A sustain electrode 12b is formed, and the edge of the sustain electrode pair 12 has a relatively narrow width compared to the sustain electrode pair 12 and a metal electrode to compensate for the resistive components of the scan and sustain electrodes 12a and 12b. (13a, 13b). A dielectric layer 14 is formed to limit the discharge current of the sustain electrode pair 12 and to insulate the sustain electrode pairs, and protective layers 16a and 16b are formed on the dielectric layer 14.
    [30] The upper plate is divided into a discharge region T1 that emits light by discharge between the sustain electrode pairs 12a and 12b and a non-discharge region T2 formed between one discharge cell and the next discharge cell and in which no discharge occurs. At this time, the protective layers 16a and 16b are formed in a stripe shape so as to apply only the discharge region by the sustain electrode pairs 12a and 12b.
    [31] In this case, the protective film deposition area is reduced, and the amount of moisture adsorbed to the protective films 16a and 16b is reduced during sealing / exhaust, thereby shortening the exhaust process and reducing phosphor degradation.
    [32] 5A through 5E are diagrams sequentially illustrating a method of manufacturing a top plate of a plasma display panel according to an exemplary embodiment of the present invention.
    [33] First, as illustrated in FIGS. 5A and 5B, the scan and sustain electrodes 12a and 12b and the bus electrodes 13a and 13b in the form of lines forming the discharge sustain electrode pairs 12 and 13 are respectively formed on the upper substrate 1. The pattern is formed at regular intervals. When the pattern is formed, the firing process is performed at 500 ° C. or higher. After the firing process, as shown in FIG. 5C, a wall charge is generated on the entire surface of the upper substrate 11 to form a dielectric layer 14 for reducing the driving voltage. In this case, the dielectric layer 14 includes silicon oxide (SiO 2 ) and lead oxide (PbO) as main components. Once the dielectric layer 14 is formed, it undergoes another firing process.
    [34] When the dielectric layer 14 is formed, the pattern mask 16 is arranged on the upper substrate 11 as shown in FIG. 5D. In this case, the pattern mask 16 includes a blocking portion 16a disposed on the non-discharge region T2 between the discharge cells, and an open portion arranged on the discharge region T1 where the discharge is generated by the sustain electrode pair 12. It consists of 16b. When the pattern mask 16 is arranged, a line is parallel with the sustain electrode pair 12 as shown in FIG. 5E to protect the dielectric layer 14 from sputtering generated during discharge through the open portion 16b of the pattern mask 16. A protective layer 15 of the form is formed. As the protective layer 6, magnesium oxide (MgO) is used.
    [35] When the finished superstructure and the substructure are sealed by frittgrass, a space is formed in the sealed interior. The air in this space is drawn out by using a gas injection glass tube, the internal vacuum is made through the exhaust process, and the glass tube is sealed with heat to form a complete sealing space.
    [36] As described above, the AC plasma display panel according to the present invention is formed by patterning a protective film deposited on the upper surface of the PDP only in the discharge region to reduce the amount of magnesium oxide to be removed during the sealing of the upper and lower plates, that is, the contamination source adsorbed on the protective film. do.
    [37] 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.
    权利要求:
    Claims (4)
    [1" claim-type="Currently amended] Electrodes formed on the substrate to cause discharge,
    A dielectric layer formed on the substrate to cover the electrodes;
    And a protective layer formed on only the discharge region by the electrodes on the dielectric layer.
    [2" claim-type="Currently amended] The method of claim 1,
    And said protective film is a magnesium oxide film deposited on said substrate at high temperature.
    [3" claim-type="Currently amended] Forming electrode pairs formed on a substrate in a predetermined pattern including a metal material to cause discharge;
    Forming and firing a dielectric layer over the substrate;
    And forming a protective layer on the dielectric layer so as to cover only a region where a discharge is caused by the electrode pairs.
    [4" claim-type="Currently amended] The method of claim 3, wherein
    The forming of the protective layer may include arranging a mask having an open discharge region on a substrate;
    And depositing magnesium oxide on the substrate through the mask.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-12-04|Application filed by 엘지전자 주식회사
    2001-12-04|Priority to KR1020010076381A
    2003-06-12|Publication of KR20030046062A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020010076381A|KR20030046062A|2001-12-04|2001-12-04|Plasma Display Panel and Fabricating Method Thereof|
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