EP0003365A2 - Méthode de fabrication d'un écran d'images en couleurs plan ou courbé dans une direction; écran d'images en couleurs fabriqué par cette méthode - Google Patents

Méthode de fabrication d'un écran d'images en couleurs plan ou courbé dans une direction; écran d'images en couleurs fabriqué par cette méthode Download PDF

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Publication number
EP0003365A2
EP0003365A2 EP79100269A EP79100269A EP0003365A2 EP 0003365 A2 EP0003365 A2 EP 0003365A2 EP 79100269 A EP79100269 A EP 79100269A EP 79100269 A EP79100269 A EP 79100269A EP 0003365 A2 EP0003365 A2 EP 0003365A2
Authority
EP
European Patent Office
Prior art keywords
coating
substrate
mask
phosphor
masks
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
EP79100269A
Other languages
German (de)
English (en)
Other versions
EP0003365B1 (fr
EP0003365A3 (en
Inventor
Rolf Dr. Dipl.-Phys. Wengert
Wilhelm Huber
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0003365A2 publication Critical patent/EP0003365A2/fr
Publication of EP0003365A3 publication Critical patent/EP0003365A3/xx
Application granted granted Critical
Publication of EP0003365B1 publication Critical patent/EP0003365B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2277—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by other processes, e.g. serigraphy, decalcomania

Definitions

  • the present patent application relates to a method according to the preamble of patent claim 1.
  • red, green and blue phosphors are applied by coating the entire area three times (sedimentation combined with spinning), by exposing three times (photo technology for each color individually) and then washing off the unexposed areas and subsequent drying processes before the next coating.
  • the object on which the present invention is based is to produce a flat or one-way curved phosphor screen in several colors - e.g. with the three primary colors red, green and blue - for flat color screens and image displays, especially for the operation of cathode ray excitation, whereby a flat or curved glass plate is used as the screen.
  • the cumbersome procedural steps of photo technology and the associated disadvantages should be avoided and a good adhesive strength of the phosphor layers should be guaranteed.
  • the basic mask determines size, sharpness, Separation and spacing of the dye areas and, according to the invention, remains on the substrate in all color coatings.
  • the dye areas are at least 0.01 mm in size.
  • the method according to the teaching of the invention makes it possible for the colors not to overlap, for the areas applied not to be damaged by the mask for the subsequent fur, and for the geometry of the color pigment distribution to be exactly adhered to.
  • the thickness of the basic mask is approx. 10 to 30 ⁇ m larger than the planned thickness of the phosphor layers.
  • Additional n coating masks (e.g. 3) with a fixed assignment to one of the n colors (3) contain a grid with 1 / n (e.g. 1/3) of the basic grid.
  • the respective coating masks are placed one after the other, removed and cleaned after the coating. This process is carried out n times, for each color separately. The colors are applied as a finished grid.
  • a further development of the concept of the invention provides for the coating of the substrate with the phosphor suspensions to be carried out by pressure spraying, spray nozzles operating without dripping being arranged above the substrate when the substrate is arranged horizontally, or the spray direction perpendicular to the substrate plate in the case of a vertically or obliquely standing substrate arrangement is.
  • arranged at an angle of approximately 75 ° to the substrate plate is coated layer thickness of 25 / um by repeated passage of the spray jet to a-.
  • the coatings with the various masks by electrostatic spraying onto the substrate provided with a conductive layer with high voltages of 20 to 30 kV.
  • the substrates are contacted on their conductive layers, for example consisting of Sn0 2 (tin oxide) (+ pole), as are the masks.
  • the substrates lie isolated on the magzete.
  • the nozzles used in each case are earthed (-pole).
  • the fluorescent slurry is released in a finely dosed manner. The coating process takes place so slowly that a high surface coverage density can be achieved with phosphor particles with a low binder content, in which the layer thickness is easily controllable and reproducible.
  • the coating masks are put on and / or removed manually or mechanically either by mechanical or magnetic grippers.
  • Figure a) shows the arrangement before coating;
  • Figure e) the finished "colors" grid.
  • substrate 1 In principle, four arrangements of the substrates provided with the masks, which are shown in FIGS. 2 to 5, are recommended. The same reference numerals always apply: substrate 1; Basic mask 2; Coating masks 3, 4, 5; Spray nozzles 9; Holding magnets 10.
  • the sequence of the entire screen production by the phosphor coating in three colors can be seen from the diagram designated as FIG. 6.
  • the process of producing the fluorescent screen is marked by solid lines with arrows, while the dashed lines with arrows point in the direction of travel of accessories.
  • Analog processes are connected by dashed lines without arrows. Numbers without points and additional number indicate the number of the further processing step; this also applies to the numbers before the points. The numbers after the points show the different alternatives for the coating.
  • the field with a dashed outline concerns the subject of the application.
  • pigment dyes as phosphors, preferably in water-free organic slurry liquids, whose particle size distribution is between a minimum of 1 to 3 / um and a maximum of 10 to 15 / um.
  • the viscosity of the emalsions is controlled via the addition of binders, preferably in the form of collodion wool (nitrated cellulose), in the range from 1 to 35% by volume.
  • the main representatives used as phosphors are the ZnS: Ag system (zinc sulfide, silver doped) for blue, the system (ZnCd) S: Cu (zinc cadmium sulfide, copper doped) for green, and the Y 2 O 2 S system for red.
  • Eu yttrium sulfoxide, Europium doped.
  • An anhydrous phosphor slurry contains approximately
  • a water-containing phosphor slurry consists of Their characteristic features are slow drying, preferably applicable for electrostatic spraying and mask screen printing or spraying on hot substrates.
  • Potash water glass of various viscosities can also be used in the water-containing phosphor slurries, the proportion depending on the required viscosity being between 20 and 45% by volume.
  • an annealing process is carried out in an oxygen-containing atmosphere in order to drive off organic compounds and - if available - to stabilize adhesion promoters.
  • phosphor for example, ZnS: Ag, blue, medium Kono about 8 / um
  • a mixture of readily volatile acetates, methanol and butanol having a boiling range 55-118 ° C for 5 minutes in 450 ml of slurried, ie, wherein 150 rpm stirred.
  • the following is gradually added: 200 ml of butyl acetate and 200 ml of binder (collodion wool with butyl acetate and ethanol).
  • the preparation is then filled into closed containers and stored in a vibrator until further processing.
  • the slurry is filled in spray guns with built-in stirrer or additional material circulation system and sprayed onto the substrates through fine nozzles at a distance of approx. 10 cm.
  • Example 1 200 g of phosphor (e.g., (ZnCd) S:. Cu, green, medium KOMO about 8 / um) ml of ethanol as in Example 1 slurried in 340. With stirring, the following are gradually added: 65 ml of xylene, 190 ml of butyl acetate, 200 ml of a mixture of volatile acetates with methanol and butanol with a boiling range of approx. 55 to 118 ° C. and 55 ml of binder. Transfer and storage as in Example 1. The slurry is filled into sedimentation cylinders to use the electrostatic spraying methods and 60% decanted after a sedimentation time of 5 minutes.
  • phosphor e.g., (ZnCd) S:. Cu, green, medium KOMO about 8 / um
  • the decanted slurry has a particularly low concentration of clumps and has the right viscosity for electrostatic spraying.
  • the decanted fluorescent slurry is permanently in the storage vessel is stirred (magnetic stirring), the phosphor slurry is sprayed in fine doses and settles on the substrate.
  • the layer thickness is adjusted by the coating time (about 20 min) to approximately 25 / um. Analogously to the production of the three-color grid, the two other slurries prepared in the same way are applied after changing the corresponding masks.
  • 500 g of phosphor e.g. Y 2 O 2 S: Eu, average grain size approx. 5 ⁇ m ⁇
  • 147 ml of butyl acetate and 126 ml of binder collodion wool in butyl acetate and ethanol
  • Example 1 Transfer and storage as in Example 1. This suspension is sprayed with drip-free spray guns either laterally or from above onto the screen glass at a distance of 10 to 15 cm by repeatedly moving it back and forth and moving the spray gun by hand or by an automatic movement mechanism until a layer thickness of 15 to 20 / um is reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Luminescent Compositions (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP79100269A 1978-01-31 1979-01-30 Méthode de fabrication d'un écran d'images en couleurs plan ou courbé dans une direction; écran d'images en couleurs fabriqué par cette méthode Expired EP0003365B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2804127A DE2804127C2 (de) 1978-01-31 1978-01-31 Verfahren zur Herstellung eines planen oder in einer Richtung gekrümmten Leuchtstoffschirmes für flache Farbbildanzeigegeräte
DE2804127 1978-01-31

Publications (3)

Publication Number Publication Date
EP0003365A2 true EP0003365A2 (fr) 1979-08-08
EP0003365A3 EP0003365A3 (en) 1979-08-22
EP0003365B1 EP0003365B1 (fr) 1981-08-19

Family

ID=6030808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100269A Expired EP0003365B1 (fr) 1978-01-31 1979-01-30 Méthode de fabrication d'un écran d'images en couleurs plan ou courbé dans une direction; écran d'images en couleurs fabriqué par cette méthode

Country Status (4)

Country Link
US (1) US4243695A (fr)
EP (1) EP0003365B1 (fr)
JP (1) JPS54122972A (fr)
DE (1) DE2804127C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3032708C2 (de) 1980-08-30 1987-01-22 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zur Herstellung eines Dünnschicht-Magnetfeld-Sensors
DE3424714A1 (de) * 1984-07-05 1986-02-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Verfahren zur herstellung eines ebenen leuchtschirmes
US4622272A (en) * 1984-07-31 1986-11-11 Siemens Aktiengesellschaft Luminescent screen for picture display apparatus and method for manufacturing such device
US5622807A (en) * 1994-11-14 1997-04-22 Hewlett-Packard Company Phosphor film composition for use in image capture
JPH10302667A (ja) * 1997-04-28 1998-11-13 Nec Kansai Ltd カラー陰極線管とその製造方法
DE102013211634A1 (de) * 2013-06-20 2014-12-24 Osram Opto Semiconductors Gmbh Verfahren zum Herstellen eines Konversionselements
KR20240042288A (ko) * 2022-09-23 2024-04-02 삼성디스플레이 주식회사 마스크 장치 및 마스크 장치를 이용한 레진의 도포 방법

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1462653U (fr)
DE1447791A1 (de) 1963-03-18 1969-03-13 Rca Corp Verfahren zum Herstellen eines Raster-Leuchtschirms fuer Kathodenstrahlroehren

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992919A (en) 1956-12-13 1961-07-18 Gen Electric Method of making cathode ray tube screens
NL6512812A (fr) * 1965-10-02 1967-04-03
NL135549C (fr) * 1966-04-22
DE1537483A1 (de) 1967-09-23 1969-10-23 Telefunken Patent Verfahren zur Herstellung eines Leuchtschirmes fuer Farbbildkathodenstrahlroehren
DE2219261A1 (de) * 1972-04-20 1973-11-08 Licentia Gmbh Verfahren zum festlegen des abstandes zwischen einer lochmaske und der frontschale einer farbbildroehre

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1462653U (fr)
DE1447791A1 (de) 1963-03-18 1969-03-13 Rca Corp Verfahren zum Herstellen eines Raster-Leuchtschirms fuer Kathodenstrahlroehren

Also Published As

Publication number Publication date
DE2804127C2 (de) 1984-03-08
US4243695A (en) 1981-01-06
EP0003365B1 (fr) 1981-08-19
EP0003365A3 (en) 1979-08-22
JPS54122972A (en) 1979-09-22
DE2804127A1 (de) 1979-08-02

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