WO2011074822A2 - 플라즈마 디스플레이 패널의 유전체 조성물 - Google Patents
플라즈마 디스플레이 패널의 유전체 조성물 Download PDFInfo
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- WO2011074822A2 WO2011074822A2 PCT/KR2010/008740 KR2010008740W WO2011074822A2 WO 2011074822 A2 WO2011074822 A2 WO 2011074822A2 KR 2010008740 W KR2010008740 W KR 2010008740W WO 2011074822 A2 WO2011074822 A2 WO 2011074822A2
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- dielectric
- composition
- plasma display
- display panel
- dielectric composition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
- H01B3/087—Chemical composition of glass
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
- C03C8/08—Frit compositions, i.e. in a powdered or comminuted form containing phosphorus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
- H01J11/12—AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/38—Dielectric or insulating layers
Definitions
- the present invention relates to a dielectric composition of a plasma display panel, and more particularly to a dielectric composition of a plasma display panel to minimize the power consumption while preventing environmental pollution due to heavy metals.
- a plasma display panel is one of flat panel display elements, and is a display element which displays an image by ultraviolet rays generated when an inert mixed gas discharges inside a cell to emit phosphors.
- Plasma display panels are attracting attention as large-area flat panel displays because they are easily thinned and large in size, and are classified into an alternating current (AC) type and a direct current (DC) type according to the discharge method.
- AC alternating current
- DC direct current
- a three-electrode AC surface discharge plasma display panel is mainly used.
- a dielectric layer 23 is formed on a rear substrate 21, and extends in one direction at a distance from the address electrode 25 on the dielectric layer 23.
- Two partitions 27 are disposed on the dielectric layer 23 between the address electrodes 25 so as to extend in the same direction as the address electrodes 25, the phosphor 29 is the dielectric layer 23, the address electrodes 25, and It is formed on the surface except the upper side of the partition 27.
- the transparent conductive sustain electrode 24 extends in the direction crossing the address electrode 25 on the front substrate 22, and the transparent conductive scan electrode 26 is arranged between the front electrode 24.
- On the surface of (22) is arranged extending in parallel with the sustain electrode 24 at a spaced interval.
- a bus electrode 24a for reducing the resistance of the sustain electrode 24 extends along the longitudinal direction of the sustain electrode 24 and is disposed on a portion of the scan electrode 26.
- the bus electrode 26a for reducing the resistance of the scan electrode 26 extends along the longitudinal direction of the scan electrode 26, and the dielectric layer 28 is formed on the sustain electrode 24 and the scan electrode 26. ) Is formed, and a protective layer 30 is formed on the dielectric layer 28.
- PbO-based glass or Bi 2 O 3 -based glass is mainly used as the transparent insulating film such as the dielectric layer 23 and the dielectric layer 28.
- composition ratio in Table 1 computes the weight of a glass composition at 100 weight%.
- the dielectric layer having the composition shown in Table 1 has various problems. That is, since the PbO-based dielectric composition and the Bi 2 O 3 -based dielectric composition contain heavy metals, there is a high possibility of environmental pollution due to heavy metals when the plasma display panel is disposed of. In addition, since the dielectric constant of the PbO-based dielectric composition and the Bi 2 O 3 -based dielectric composition is high, the power consumption of the plasma display panel is high. When the PbO-based dielectric composition or the Bi 2 O 3 -based dielectric composition reacts with the address electrode, the scan electrode, or the sustain electrode, yellowing occurs, thereby lowering the transmittance and lowering the color temperature or color purity. In addition, Bi 2 O 3 -based dielectric composition is expensive. Therefore, there is a need for a solution to the problem of such dielectric compositions.
- an object of the present invention is to prevent the environmental pollution caused by heavy metals by forming the dielectric layer of the plasma display panel with a glass composition containing no heavy metals.
- Another object of the present invention is to form a dielectric layer of a plasma display panel with a low dielectric constant glass composition to minimize power consumption.
- the dielectric composition of the plasma display panel according to the embodiment of the present invention in the dielectric composition of the plasma display panel, B 2 O 3 is 15 ⁇ 40wt%, P 2 O 5 is 3 ⁇ 15 wt%, BaO is 0.1 to 20wt%, CaO is 0.1 to 20wt%, ZnO is characterized in that it comprises 10 to 40wt%.
- the composition may further comprise 0.1 to 10 wt% of one or more oxides selected from SiO 2 and Al 2 O 3 .
- the composition may further comprise 0.1 to 10 wt% of at least one oxide selected from the group consisting of CuO, CeO 2 , CoO, V 2 O 5 , La 2 O 3 and Nd 2 O 3 . .
- the dielectric composition of the plasma display panel in the dielectric composition of the plasma display panel, B 2 O 3 is 15 ⁇ 40wt%, P 2 O 5 is 3 ⁇ 15wt%, BaO 0.1 ⁇ 20wt%, CaO 0.1 ⁇ 20wt%, ZnO is included 10 ⁇ 40wt%, any one or more oxides selected from SiO 2 and Al 2 O 3 is included as 0.1 ⁇ 10wt% And, at least one oxide selected from the group consisting of CuO, CeO 2 , CoO, V 2 O 5 , La 2 O 3 and Nd 2 O 3 is characterized in that it comprises 0.1 to 10wt%.
- the content of B 2 O 3 it is possible to be higher than the content of the P 2 O 5 .
- the composition may not include a PbO based dielectric composition or a Bi 2 O 3 based dielectric composition.
- the dielectric composition of the present invention it is possible to prevent heavy metal environmental pollution caused by the disposal of the plasma display panel, and to minimize the power consumption of the plasma display panel.
- FIG. 1 is a perspective view schematically showing a structure of a general plasma display panel to which the present invention is applied.
- the dielectric composition of the plasma display panel according to the present invention which is applied to the dielectric layers 23 and 28 as shown in FIG. 1, has B 2 O 3 of 15 to 40 wt% as its main component and P 2 O 5 of 3 to 15 wt%, BaO is 0.1 to 20 wt%, CaO is 0.1 to 20 wt%, and ZnO is 10 to 40 wt%.
- B 2 O 3 of 15 to 40 wt% as its main component and P 2 O 5 of 3 to 15 wt%
- BaO is 0.1 to 20 wt%
- CaO 0.1 to 20 wt%
- ZnO is 10 to 40 wt%.
- Any one or more selected oxides may be composed of 0.1 ⁇ 10wt%.
- B 2 O 3 is a dielectric-forming oxide which is an essential component for forming a dielectric material, and serves to increase the dielectric constant and linear expansion coefficient of the dielectric material as its content decreases in the dielectric composition system.
- B 2 O 3 is less than 15 wt%, it is difficult to form a dielectric material, and when it exceeds 40 wt%, water resistance is weakened and commercialization of the dielectric is difficult. Therefore, a content of 15 to 40 wt% is preferable.
- the content of P 2 O 5 is preferably 3 to 15 wt%, more preferably 5 to 10 wt%. This is because stability is lowered at less than 3wt%, and out of the dielectric formation region is greater than 15wt%.
- CaO and BaO act as dielectric modifiers, lower the transition point and softening temperature of the dielectric, and increase the dielectric constant and linear expansion coefficient of the dielectric.
- CaO and BaO have a less effective effect at less than 0.1 wt%, and cause an devitrification at greater than 20 wt%, so a content of 0.1 to 20 wt% is preferred.
- ZnO acts as a dielectric modifier and is used to improve the breakthrough resistance and chemical resistance of the dielectric. ZnO is less effective at less than 10wt%, and crystallization occurs in the dielectric material at more than 40wt%, so it is preferably included in an amount of 10 to 40wt%.
- Na 2 O, K 2 O, and Li 2 O are added in the range of 0 to 10 wt% to lower the transition point and softening point of the dielectric.
- the thermal expansion coefficient of the dielectric material is increased at 10 wt% or more, resulting in poor adhesion between the dielectric material and the substrate after firing the dielectric material, and the crystallization temperature of the dielectric material is formed at 580 ° C., thereby making it impossible to obtain a transparent dielectric material. If these components are not added, the dielectric will not be calcined at temperatures below 600 ° C.
- CuO, CeO 2 , CoO, V 2 O 5 , La 2 O 3 , Nd 2 O 3 are additives to inhibit yellowing with silver ions moving from silver (Ag) electrode through redox reaction It acts as a color filter that absorbs unnecessary light that degrades external light and color purity and transmits red light, green light, and blue light.
- Such additives are preferably included in an amount of 0.1 to 10wt%. If it is less than 0.1wt%, the effect is insignificant, and if it exceeds 10wt%, the mother glass becomes colored to significantly reduce the transmittance.
- SiO 2 and Al 2 O 3 are components that stabilize the dielectric, and are preferably added at 0.1 to 10 wt% in the dielectric composition of the present invention.
- SiO 2 or Al 2 O 3 is less than 0.1wt%, the effect is insignificant, and when it exceeds 10wt%, the softening point of the dielectric is increased to 650 ° C or more, and there is a problem in the firing temperature.
- the content of B 2 O 3 is preferably higher than the content of P 2 O 5 .
- the dielectric composition of the present invention preferably does not include a PbO-based dielectric composition or a Bi 2 O 3 -based dielectric composition.
- a dielectric composition of the plasma display panel of the present invention was prepared with the composition according to Table 2.
- Each of the six sample samples at the mixing ratio of the composition shown in Table 2 was put into an electric furnace and melted for about one hour to about 1200-1350 °C Celsius, and then quenched dry using a twin roll.
- the quenched glass was roughly pulverized with a mill disc, and finely pulverized with a dry pulverizer to prepare a glass powder for PDP dielectric having an average particle diameter of 2.5 ⁇ .
- the coated transparent glass substrate was coated with a screen printing method with a thickness of 100-150 ⁇ m and dried by applying heat of 120-180 ° C.
- the compounding ratio of the composition and the ethyl cellulose-based vehicle is blended at about 7: 3% by weight, but since the ethyl cellulose-based vehicle is volatilized, the compounding ratio is 6: 4-9: 1 depending on the viscosity of the paste. You may mix and adjust suitably.
- the ethyl cellulose-based vehicle may be BCA (Butyl Carbinol Acetate), DBP (DebutylPhthalate), or the like, in addition to alpha-terpineol, and these materials may be used alone or as a suitable mixture.
- BCA butyl Carbinol Acetate
- DBP DebutylPhthalate
- the dried glass composition paste was fired at a temperature of about 580 ° C. to prepare six samples according to Examples 1 to 6 as shown in Table 2.
- the paste was baked at a temperature of 580 ° C.
- Comparative Examples 1 to 3 of the dielectric composition of the plasma display panel were manufactured using the composition according to Table 2 above.
- the molten dielectric material is formed into a block and polished to a size of 3 mm x 3 mm x 19 mm, and then softened (transferring from solid phase to liquid phase while raising the temperature to 500 ° C at a temperature increase rate of 10 ° C / min). And the temperature at which the time) occurs is recorded.
- the specimen was polished to a size of 4 mm x 4 mm, immersed in distilled water at 30 deg. C, and observed by an optical microscope to see if a water film was formed on the surface thereof.
- the molten dielectric material is formed into a mass and polished to a size of 3 mm x 3 mm x 15 mm, and then the temperature is increased to 500 ° C at a temperature rising rate of 10 ° C / min, between 50 ° C and 350 ° C. The degree of expansion of the specimen was measured at.
- each sample was cut into a size of 100 mm x 50 mm, and the degree of diffusion of the metal electrode of silver (Ag) was evaluated using a color limiter and recorded in comparison with the color index.
- each dielectric film was cut into a size of 100 mm x 50 mm, and then a dielectric breakdown voltage of the dielectric film was measured by applying a direct current (DC) voltage to both upper and lower electrodes of the specimen.
- DC direct current
- permeability was based on 550 nm band using ultraviolet-ray.
- B 2 O 3 which is an essential component for forming the glass composition of the blue type transparent dielectric film
- the content of the borosilicate glass increases although the transition point and the firing point of the glass are lowered, in contrast to the low temperature calcined material, the transition point and the firing point of the glass are increased as the content is increased.
- Examples 1-6 showed 80% or more high transmittance
- the dielectric constants of Examples 1 to 6 are in the range of 8 to 9
- the dielectric constants of Comparative Examples 2 and 3 are in the range of 10.5 to 11.5. It can be seen that it has a low power consumption.
- Comparative Example 2 and Comparative Example 3 in which Bi 2 O 3 and PbO are the main constituents of the dielectric, and Comparative Example 1 without P 2 O 5 added, exhibited undesirable characteristics as the dielectric.
- Examples 1 to 6 according to the present invention was confirmed to have a low dielectric constant, showing the desirable properties as a dielectric.
- the present invention can minimize the power consumption by lowering the dielectric constant of the dielectric material, and since the dielectric glass composition does not contain heavy metals such as lead or bismuth, it is possible to prevent environmental pollution due to heavy metals, and 600 ° C. or less. It is possible to stably low temperature firing at the temperature of, and the PDP glass substrate must be low temperature firing at a temperature of 600 ° C. or lower because the deformation of the PDP glass substrate can not produce a panel. If a small amount of NiO, CuO, CoO, Nd 2 O 3 , or CeO 2 is added, the reaction with the electrode after firing can be minimized to prevent yellowing, and the dielectric film obtained after firing will have a blue color, thereby reducing the color temperature. Not only that, but also the color purity can be increased.
- the thickness of the dielectric can be reduced to reduce the cost of the dielectric.
- the dielectric constant is lower than the conventional PbO-based or Bi 2 O 3- based glass has the effect of lowering the power consumption.
Abstract
Description
PbO | B2O3 | ZnO | BaO | Bi2O3 | Al2O3 | SiO2 | |
PbO계 | 40~45 | 20~25 | 10~15 | 1~5 | 5~10 | ||
Bi2O3계 | 15~19 | 20~24 | 7~11 | 41~45 | 2~7 | 1~5 |
실시예1 | 실시예2 | 실시예3 | 실시예4 | 실시예5 | 실시예6 | 비교예1 | 비교예2 | 비교예3 | |
Bi2O3(wt%) | 42 | ||||||||
PbO(wt%) | 45 | ||||||||
B2O3(wt%) | 40 | 48 | 35 | 30 | 25 | 32.5 | 40 | 25 | 17 |
BaO(wt%) | 7 | 6 | 10 | 15 | 7 | 11 | 7 | 15 | 11 |
ZnO(wt%) | 22 | 20 | 25 | 13 | 31.5 | 24 | 25 | 22 | |
CaO(wt%) | 13 | 5 | 10.5 | 17 | 10 | 7 | 13 | ||
Al2O3(wt%) | 8 | 3 | 1.5 | 3 | 8 | 5 | 3 | ||
P2O5(wt%) | 5 | 6.8 | 10 | 13 | 15 | 6 | |||
SiO2(wt) | 7.8 | 1 | 5 | 7 | 7 | 1.4 | 10 | 5 | |
Li2O(wt%) | 5 | 5 | 2 | 4 | 5 | ||||
Na2O(wt%) | 5 | 2 | 2 | ||||||
K2O(wt%) | 1 | 3 | 2 | 1 | |||||
CuO(wt%) | 0.1 | 0.2 | 0.3 | ||||||
CeO2(wt%) | 0.2 | 0.2 | |||||||
CoO(wt%) | 0.1 | 0.3 | 0.2 | 2.5 | 0.3 | ||||
La2O3(wt%) | 0.2 | 0.1 | |||||||
Nd2O3(wt%) | 0.3 |
실시예1 | 실시예2 | 실시예3 | 실시예4 | 실시예5 | 실시예6 | 비교예1 | 비교예2 | 비교예3 | |
전이점Tg(℃) | 476 | 483 | 470 | 468 | 465 | 469 | 479 | 475 | 480 |
연화점Ts(℃) | 500 | 509 | 497 | 495 | 491 | 495 | 501 | 496 | 498 |
선팽창계수TEC(×10-7) | 75 | 71 | 79 | 82 | 84 | 80 | 74 | 75.3 | 72.3 |
유전율 | 8.5 | 8.1 | 8.7 | 8.9 | 9 | 8.5 | 8.6 | 10.5 | 11.5 |
내수성 | 양호 | 양호 | 양호 | 양호 | 양호 | 양호 | 수막형성 | 양호 | 양호 |
황변현상 | 유 | 무 | 무 | 무 | 무 | 무 | 무 | 유 | 유 |
투과율(%) | 83 | 81 | 85 | 83 | 82 | 80 | 70 | 77 | 76 |
결정화 유무 | 무 | 무 | 무 | 무 | 무 | 무 | 무 | 무 | 무 |
내전압(Kv) | 3.4 | 3.5 | 3.4 | 3.5 | 3.6 | 3.5 | 3.4 | 1.8 | 1.7 |
Claims (6)
- 플라즈마 디스플레이 패널의 유전체 조성물에 있어서,B2O3는 15~40wt%, P2O5는 3~15wt%, BaO는 0.1~20wt%, CaO는 0.1~20wt%, ZnO는 10~40wt%로 포함되는 것을 특징으로 하는 플라즈마 디스플레이 패널의 유전체 조성물.
- 제1항에 있어서,상기 조성물은 SiO2 및 Al2O3 중 선택되는 어느 하나 이상의 산화물을 0.1~10wt%로 더 포함하는 것을 특징으로 하는 플라즈마 디스플레이 패널의 유전체 조성물.
- 제1항에 있어서,상기 조성물은 CuO, CeO2, CoO, V2O5, La2O3 및 Nd2O3로 이루어진 군에서 선택되는 어느 하나 이상의 산화물을 0.1~10wt%로 더 포함하는 것을 특징으로 하는 플라즈마 디스플레이 패널의 유전체 조성물.
- 플라즈마 디스플레이 패널의 유전체 조성물에 있어서,B2O3는 15~40wt%, P2O5는 3~15wt%, BaO는 0.1~20wt%, CaO는 0.1~20wt%, ZnO는 10~40wt%로 포함되고,SiO2 및 Al2O3 중 선택되는 어느 하나 이상의 산화물은 0.1~10wt%로 포함되며,CuO, CeO2, CoO, V2O5, La2O3 및 Nd2O3로 이루어진 군에서 선택되는 어느 하나 이상의 산화물은 0.1~10wt%로 포함되는 것을 특징으로 하는 플라즈마 디스플레이 패널의 유전체 조성물.
- 제1항 또는 제4항에 있어서,상기 B2O3의 함량은, 상기 P2O5의 함량보다 더 높은 것을 특징으로 하는 플라즈마 디스플레이 패널의 유전체 조성물.
- 제1항 또는 제4항에 있어서,상기 조성물은 PbO계 유전체 조성물 또는 Bi2O3계 유전체 조성물을 포함하지 않는 것을 특징으로 하는 플라즈마 디스플레이 패널의 유전체 조성물.
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CN2010800568965A CN102667963A (zh) | 2009-12-18 | 2010-12-08 | 等离子体显示面板的电介质组合物 |
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KR1020100124029A KR20110070786A (ko) | 2009-12-18 | 2010-12-07 | 플라즈마 디스플레이 패널의 유전체 조성물 |
KR10-2010-0124029 | 2010-12-07 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20060034404A (ko) * | 2004-10-19 | 2006-04-24 | 대주전자재료 주식회사 | 플라즈마 디스플레이 패널 투명 유전체용 유리 조성물 |
JP2006182589A (ja) * | 2004-12-27 | 2006-07-13 | Nihon Yamamura Glass Co Ltd | ビスマス系無鉛ガラス組成物 |
KR100829704B1 (ko) * | 2007-06-04 | 2008-05-14 | 엘지전자 주식회사 | 플라즈마 디스플레이 패널 유전체용 조성물, 이를 포함하는플라즈마 디스플레이 패널 및 그 제조방법 |
JP2008201593A (ja) * | 2007-02-16 | 2008-09-04 | Asahi Glass Co Ltd | プラズマディスプレイパネル背面誘電体用ガラスセラミックス組成物 |
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- 2010-12-08 WO PCT/KR2010/008740 patent/WO2011074822A2/ko active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20060034404A (ko) * | 2004-10-19 | 2006-04-24 | 대주전자재료 주식회사 | 플라즈마 디스플레이 패널 투명 유전체용 유리 조성물 |
JP2006182589A (ja) * | 2004-12-27 | 2006-07-13 | Nihon Yamamura Glass Co Ltd | ビスマス系無鉛ガラス組成物 |
JP2008201593A (ja) * | 2007-02-16 | 2008-09-04 | Asahi Glass Co Ltd | プラズマディスプレイパネル背面誘電体用ガラスセラミックス組成物 |
KR100829704B1 (ko) * | 2007-06-04 | 2008-05-14 | 엘지전자 주식회사 | 플라즈마 디스플레이 패널 유전체용 조성물, 이를 포함하는플라즈마 디스플레이 패널 및 그 제조방법 |
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