EP1187167A1 - Panneau d'affichage à couleurs avec couche luminescente bleue - Google Patents

Panneau d'affichage à couleurs avec couche luminescente bleue Download PDF

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Publication number
EP1187167A1
EP1187167A1 EP01000410A EP01000410A EP1187167A1 EP 1187167 A1 EP1187167 A1 EP 1187167A1 EP 01000410 A EP01000410 A EP 01000410A EP 01000410 A EP01000410 A EP 01000410A EP 1187167 A1 EP1187167 A1 EP 1187167A1
Authority
EP
European Patent Office
Prior art keywords
phosphor
color screen
color
phosphor layer
blue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01000410A
Other languages
German (de)
English (en)
Other versions
EP1187167B1 (fr
Inventor
Helmut Dr. Bechtel
Wolfgang Busselt
Thomas Dr. Jüstel
Martin Weibrecht
Peter Quadflieg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Corporate Intellectual Property GmbH
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Corporate Intellectual Property GmbH, Koninklijke Philips Electronics NV filed Critical Philips Corporate Intellectual Property GmbH
Publication of EP1187167A1 publication Critical patent/EP1187167A1/fr
Application granted granted Critical
Publication of EP1187167B1 publication Critical patent/EP1187167B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01J11/42—Fluorescent layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/187—Luminescent screens screens with more than one luminescent material (as mixtures for the treatment of the screens)
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/26—Luminescent screens with superimposed luminescent layers

Definitions

  • the invention relates to a color screen, in particular a plasma screen, equipped with a blue fluorescent layer
  • the additive is used to display colored images on screens Color mixing. A large part of the colors occurring in nature can be seen through represent additive mixture of the three primary colors red, green and blue of corresponding intensity.
  • This principle is used in both emitting screens and cathode ray tubes or plasma screens as well as in non-emissive screens such as liquid crystal screens applied.
  • the representation of the different colors is determined by so-called standard color curves.
  • a widely used standard is the CIE color triangle.
  • the area of the representable Colors in a screen are given by the color points of the three phosphors defined by the respective emission spectrum.
  • the blue one Light emission at least contributes to the luminance (brightness) of a screen.
  • the blue-emitting phosphors are not as efficient like the green and red emitting phosphors. Both of these effects cause the color temperature for white light for television applications is lower than desired.
  • This task is solved by a color screen equipped with a blue one Phosphor layer, which is a first phosphor that has a light emission in the range of 430 to 490 nm, and a second phosphor that emits light in the Has a range from 380 to 450 nm.
  • the second phosphor has a light emission in the range from 380 to 420 nm.
  • the second phosphor is selected from the group of Tb 3+ -activated phosphors, Eu 2+ -activated phosphors, Bi 3+ -activated phosphors, Ga 3+ -activated phosphors and Ce 3+ -activated phosphors.
  • the second phosphor is selected from the group LaOBr: Tb, Y 2 O 2 S: Tb, Y 3 Al 5 O 12 : Tb, Ca 3 (PO 4 ) 2 : Eu, Sr 2 P 2 O 7 : Eu, (Sr, Mg) 2 P 2 O 7 : Eu CaB 2 P 2 O 9 : Eu, CaSO 4 : Eu, CaO: Bi, ZnO: Ga and (Y, Gd) BO 3 : Ce.
  • All of these phosphors emit efficiently under UV light excitation or by excitation with an electron beam light with a wavelength between 380 and 450 nm.
  • the phosphor layer is a physical mixture of particles of the contains first phosphor and Partieln the second phosphor.
  • the proportion of second phosphor in the phosphor layer between 5 and 50 wt .-% based on the amount of the first phosphor.
  • This embodiment is easy to implement because the second phosphor is easy to use Suspension of the phosphor, with which the phosphor layer is produced, is given can be.
  • the phosphor layer has a base layer made of the first phosphor and a cover layer made of the second phosphor.
  • the first phosphor is selected from the group ZnS: Ag, BaMgAl 10 O 17 : Eu and (Ba, Sr, Ca) 5 (PO 4 ) 3 Cl: Eu.
  • the ZnS: Ag phosphor is particularly suitable as a blue-emitting phosphor in color cathode ray tubes, since it efficiently emits blue light under electron beam excitation.
  • the blue-emitting phosphors BaMgAl 10 O 17 : Eu and (Ba, Sr, Ca) 5 (PO 4 ) 3 Cl: Eu are particularly suitable for use in plasma screens because they have high color saturation and efficient conversion of UV light show in blue light. They also withstand the thermal stress during the manufacture of the plasma screens.
  • the color screen is selected from the group of Cathode ray tubes, plasma screens and liquid crystal screens.
  • These color screens equipped with a blue phosphor layer according to the invention have an increased luminance because of the improved blue light emission higher Shares of red and green light can be used for color display.
  • the red and green light emissions contribute more to the luminance of a color screen than the blue light emission. It is also advantageous that despite the increased proportions of red and green light the color impression for white light is not changed.
  • the electrodes have a front plate 1 and a carrier plate 2.
  • the front panel 1 contains a glass plate 3 and on the glass plate 3 is a dielectric layer 4, preferably PbO-containing glass applied. Parallel, strip-shaped are on the glass plate 3
  • Discharge electrodes 6, 7 applied by the dielectric layer 4 are covered.
  • the discharge electrodes 6, 7 are made of metal or ITO, for example.
  • the carrier plate 2 is made of glass and on the carrier plate 2 are parallel, strip-shaped, address electrodes 10 running perpendicular to the discharge electrodes 6, 7 for example Ag applied. These are of a phosphor layer 9, which in one of the three basic colors emitted red, green or blue, covered.
  • the individual plasma cells are through a rib structure 12 with separating ribs made of preferably dielectric material Cut.
  • a gas preferably a Noble gas mixture of, for example, He, Ne or Kr, which generates UV light Component Xe contains.
  • a plasma forms in the plasma region 8, through which each the composition of the gas radiation 11 in the UV range, in particular in the VUV range, is produced.
  • This radiation 11 stimulates the phosphor layer 9 to light up, which emits visible light 13 in one of the three primary colors, through the front panel 1 steps outwards and thus represents a luminous pixel on the screen.
  • an Eu 2+ -activated phosphor such as BaMgAl 10 O 17 : Eu or (Ba, Sr, Ca) 5 (PO 4 ) 3 Cl: Eu can be used as the blue-emitting phosphor.
  • the blue-emitting phosphor layer also contains a second phosphor which has a light emission in the range from 380 to 450 nm, preferably in the range from 380 to 420 nm.
  • the second phosphor can be selected from the group of Tb 3+ -activated phosphors, Eu 2+ -activated phosphors, Bi 3+ -activated phosphors, Ga 3+ -activated phosphors and Ce 3+ -activated phosphors.
  • the second phosphor can, for example, be selected from the group LaOBr: Tb, Y 2 O 2 S: Tb, Y 3 Al 5 O 12 : Tb, Ca 3 (PO 4 ) 2 : Eu, Sr 2 P 2 O 7 : Eu , (Sr, Mg) 2 P 2 O 7 : Eu, CaB 2 P 2 O 9 : Eu, CaSO 4 : Eu, CaO: Bi, ZnO: Ga and (Y, Gd) BO 3 : Ce. It is advantageous that the concentration of Tb 3+ in the Tb 3+ -activated phosphors is 0.1 mol% or less.
  • Zn 2 SiO 4 : Mn can be used as the green-emitting phosphor and (Y, Gd) BO 3 : Eu can be used in the phosphor layer 9 as the red-emitting phosphor.
  • a suitable first phosphor is first used for the wet coating process Water, an organic solvent, optionally together with a dispersant, a surfactant and an anti-foaming agent or a binder preparation dispersed.
  • Inorganic preparations are suitable for binder preparations for plasma screens Binder that has an operating temperature of 450 ° C without decomposition, embrittlement or survive discoloration, or organic binders that are later oxidized can be removed.
  • the blue fluorescent layer is a physical one Mixture of particles of the first phosphor and particles of the second phosphor or a base layer from the first phosphor and a cover layer from the should have second phosphor, the second phosphor to the above suspension or a separate suspension of the second phosphor is produced.
  • the back plate 2 is joined together with others Components such as a front panel 1 and a noble gas mixture for production a plasma screen is used.
  • such a blue-emitting phosphor layer preparation can be used in all Types of plasma screens, such as with AC plasma screens with or without matrix arrangement or DC plasma screens can be used.
  • the color screen is a color liquid crystal screen
  • the blue phosphor layer together with a red and a green phosphor layer can be applied to the inside of the front panel.
  • a color liquid crystal screen a light source, a polarizer, a liquid crystal cell and one Have analyzer.
  • the color screen is a color cathode ray tube
  • the blue one Fluorescent layer together with a red and a green fluorescent layer on the Be applied inside the front panel.
  • a color cathode ray tube can have at least one electron gun for emission an electron beam, a deflection device, a neck and a cone, that connects the front panel and the neck.
  • the respective areas of the phosphor layer through differently strong irradiation with an electron beam for Glow excited.
  • the use of the blue phosphor layer according to the invention the current components for the generation of white light can be equalized. This improves the luminance of the color cathode ray tube.
  • a color cathode ray tube with a shadow mask there is also color stability improved, because deformation of the shadow mask less color changes cause.
  • a suspension of 40 g BaMgAl 10 O 17 : Eu and 2 g LaOBr: Tb (0.01 mol% Tb 3+ ) was prepared, to which additives such as an organic binder and a dispersant were added.
  • the suspension was applied to a back plate 2, which had a rib structure 12 and address electrodes 10, by means of screen printing and dried. This process step was carried out in succession for the other two types of fluorescent material with the emission colors green and red.
  • a suspension of BaMgAl 10 O 17 : Eu was made, to which additives such as an organic binder and a dispersant were added.
  • the suspension was applied to a back plate 2, which had a rib structure 12 and address electrodes 10, by means of screen printing and dried.
  • a suspension of Sr 2 P 2 O 7 : Eu was then prepared, to which additives such as an organic binder and a dispersant were added. This suspension was applied by screen printing to the parts of the back plate 2 where BaMgAl 10 O 17 : Eu had previously been applied and dried.
  • a suspension of 40 g ZnS: Ag and 4 g LaOBr: Tb (0.01 mol% Tb 3+ ) was prepared, to which additives such as an organic binder and a dispersant were added.
  • the suspension was mixed with a 10% polyvinyl alcohol solution and ammonium dichromate was also added to the suspension.
  • the ratio of polyvinyl alcohol to ammonium dichromate was 10: 1.
  • the mixture obtained was applied to the inside of a front plate by means of spin coating.
  • the layer obtained was irradiated with UV light through a mask and the polymer was crosslinked at the exposed locations.
  • the non-crosslinked areas of the phosphor layer were then rinsed off by spraying with warm water.
  • Such a front panel was together with a neck, the front panel with cone connecting the neck, an electron gun provided inside the neck to emit three electron beams, one deflector and one Shadow mask used to build a color cathode ray tube.
  • a color cathode ray tube with a blue phosphor layer containing ZnS: Ag and 20% by weight of LaOBr: Tb was produced.
  • a color cathode ray tube with a blue phosphor layer which only contained ZnS: Ag was also produced.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Luminescent Compositions (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Gas-Filled Discharge Tubes (AREA)
EP01000410A 2000-09-05 2001-08-30 Panneau d'affichage à couleurs avec couche luminescente bleue Expired - Lifetime EP1187167B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10043530 2000-09-05
DE10043530A DE10043530A1 (de) 2000-09-05 2000-09-05 Farbbildschirm mit blauer Leuchtstoffschicht

Publications (2)

Publication Number Publication Date
EP1187167A1 true EP1187167A1 (fr) 2002-03-13
EP1187167B1 EP1187167B1 (fr) 2006-10-04

Family

ID=7654926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01000410A Expired - Lifetime EP1187167B1 (fr) 2000-09-05 2001-08-30 Panneau d'affichage à couleurs avec couche luminescente bleue

Country Status (7)

Country Link
US (1) US6762548B2 (fr)
EP (1) EP1187167B1 (fr)
JP (1) JP2002175763A (fr)
KR (1) KR100765307B1 (fr)
CN (1) CN1305099C (fr)
DE (2) DE10043530A1 (fr)
TW (1) TWI264035B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1215698A2 (fr) * 2000-12-12 2002-06-19 Philips Corporate Intellectual Property GmbH Ecran à plasma avec une couche luminescente
CN100347266C (zh) * 2001-05-21 2007-11-07 吉尔科有限公司 发黄光卤代磷酸盐磷光体及引入该发黄光卤代磷酸盐磷光体的光源
CN108517210A (zh) * 2018-06-07 2018-09-11 齐鲁工业大学 一种Ce3+,Dy3+掺杂的颜色可控的荧光粉及其制备方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7511428B2 (en) 2002-10-22 2009-03-31 Panasonic Corporation Plasma display panel
EP1647044A2 (fr) * 2003-07-15 2006-04-19 Philips Intellectual Property & Standards GmbH Element d'eclairage de couleur ajustable
KR100666265B1 (ko) * 2004-10-18 2007-01-09 엘지이노텍 주식회사 형광체 및 이를 이용한 발광소자
KR20090044800A (ko) * 2007-11-01 2009-05-07 삼성전기주식회사 인산계 나노 형광체 및 나노 형광체 제조 방법
CN102660264B (zh) * 2012-04-17 2014-06-04 绍兴文理学院 一种近紫外光激发白光LED用ZnO基荧光粉材料及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5091718A (en) * 1988-01-29 1992-02-25 Beatty Paul H J Color-monochrome visual display device
US5277841A (en) * 1993-02-11 1994-01-11 Samsung Display Devices Co., Ltd. Mixed blue emitting phosphor
US5866977A (en) * 1996-12-03 1999-02-02 Samsung Display Devices Co., Ltd. Phosphor screen with double layered blue phosphor and method thereof
JPH1196923A (ja) * 1997-09-19 1999-04-09 Fujitsu Ltd プラズマディスプレイパネル

Family Cites Families (11)

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NL8303782A (nl) * 1983-11-03 1985-06-03 Philips Nv Beeldbuis.
US4623816A (en) * 1985-04-22 1986-11-18 General Electric Company Fluorescent lamp using multi-layer phosphor coating
JPH02120389A (ja) * 1988-10-28 1990-05-08 Toshiba Corp 蛍光ランプ
JPH02135276A (ja) * 1988-11-16 1990-05-24 Hitachi Ltd ブラウン管
CA2041089C (fr) * 1990-05-10 1995-01-17 Yasuo Iwasaki Couche pour la plaque de face d'un tube cathodique couleur
KR100268715B1 (ko) 1993-02-11 2000-11-01 김순택 혼합 청색발광 형광체
EP0686997A3 (fr) * 1994-06-06 1996-06-26 Matsushita Electric Ind Co Ltd Lampe à décharge et dispositif d'éclairage pour un éclairage général
KR100199557B1 (ko) * 1996-12-13 1999-06-15 손욱 플리커리스 브라운관용 형광막 및 그 제조 방법
JPH10208647A (ja) 1997-01-29 1998-08-07 Nec Kansai Ltd プラズマディスプレイパネル
US6010644A (en) * 1997-05-09 2000-01-04 Kabushiki Kaisha Ohara Long-lasting phosphor
JP4151104B2 (ja) 1998-03-31 2008-09-17 株式会社日立製作所 プラズマディスプレイ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5091718A (en) * 1988-01-29 1992-02-25 Beatty Paul H J Color-monochrome visual display device
US5277841A (en) * 1993-02-11 1994-01-11 Samsung Display Devices Co., Ltd. Mixed blue emitting phosphor
US5866977A (en) * 1996-12-03 1999-02-02 Samsung Display Devices Co., Ltd. Phosphor screen with double layered blue phosphor and method thereof
JPH1196923A (ja) * 1997-09-19 1999-04-09 Fujitsu Ltd プラズマディスプレイパネル

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 09 30 July 1999 (1999-07-30) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1215698A2 (fr) * 2000-12-12 2002-06-19 Philips Corporate Intellectual Property GmbH Ecran à plasma avec une couche luminescente
EP1215698A3 (fr) * 2000-12-12 2005-02-09 Philips Intellectual Property & Standards GmbH Ecran à plasma avec une couche luminescente
CN100347266C (zh) * 2001-05-21 2007-11-07 吉尔科有限公司 发黄光卤代磷酸盐磷光体及引入该发黄光卤代磷酸盐磷光体的光源
CN108517210A (zh) * 2018-06-07 2018-09-11 齐鲁工业大学 一种Ce3+,Dy3+掺杂的颜色可控的荧光粉及其制备方法
CN108517210B (zh) * 2018-06-07 2021-01-08 齐鲁工业大学 一种Ce3+, Dy3+掺杂的颜色可控的荧光粉及其制备方法

Also Published As

Publication number Publication date
TWI264035B (en) 2006-10-11
KR100765307B1 (ko) 2007-10-10
EP1187167B1 (fr) 2006-10-04
US20020047510A1 (en) 2002-04-25
DE50111136D1 (de) 2006-11-16
DE10043530A1 (de) 2002-03-14
CN1342991A (zh) 2002-04-03
CN1305099C (zh) 2007-03-14
JP2002175763A (ja) 2002-06-21
US6762548B2 (en) 2004-07-13
KR20020019392A (ko) 2002-03-12

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