JPS56875A - Filter pigment-coated red light-emitting phosphor and production thereof - Google Patents
Filter pigment-coated red light-emitting phosphor and production thereofInfo
- Publication number
- JPS56875A JPS56875A JP7631779A JP7631779A JPS56875A JP S56875 A JPS56875 A JP S56875A JP 7631779 A JP7631779 A JP 7631779A JP 7631779 A JP7631779 A JP 7631779A JP S56875 A JPS56875 A JP S56875A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- production
- red light
- emitting phosphor
- mixt
- 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.)
- Pending
Links
Landscapes
- Luminescent Compositions (AREA)
Abstract
PURPOSE: To obtain titled phosphor which has excellent reflectance and luminous brightness and is suitable for the phosphor screen of cathode-ray tube, by a method wherein a coated layer consisting of a composite compound of indium sulfide and sodium sulfate is formed on the surface of europium-activated yttrium oxysulfide phosphor which is used as a core.
CONSTITUTION: Finely divided indium oxide having an average particle diameter of 0.1W1μ is dispersed in water. Europium-activated yttrium oxysulfide phosphor is mixed with the dispersion system. The mixt. is dried to obtain a powder. 0.5W 3wt% of sodium carbonate and 2W10wt% of sulfur are mixed with the dried powder. The mixt. is calcined at a temp. of 800W900°C for 1W2hr to coat the core phosphor with a composite compound of indium sulfide and sodium sulfate. Then the product is baked at a temp. of 400W600°C to obtain in desired phosphor.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7631779A JPS56875A (en) | 1979-06-19 | 1979-06-19 | Filter pigment-coated red light-emitting phosphor and production thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7631779A JPS56875A (en) | 1979-06-19 | 1979-06-19 | Filter pigment-coated red light-emitting phosphor and production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56875A true JPS56875A (en) | 1981-01-07 |
Family
ID=13601986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7631779A Pending JPS56875A (en) | 1979-06-19 | 1979-06-19 | Filter pigment-coated red light-emitting phosphor and production thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56875A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04234480A (en) * | 1990-12-15 | 1992-08-24 | Samsung Display Devices Co Ltd | Red light emitting phosphor having adherent pigment and its manufacture |
WO2004059686A1 (en) * | 2002-12-26 | 2004-07-15 | Kabushiki Kaisha Toshiba | Display |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5472783A (en) * | 1977-11-24 | 1979-06-11 | Toshiba Corp | Pigment-coated fluorescent substance and production thereof |
-
1979
- 1979-06-19 JP JP7631779A patent/JPS56875A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5472783A (en) * | 1977-11-24 | 1979-06-11 | Toshiba Corp | Pigment-coated fluorescent substance and production thereof |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04234480A (en) * | 1990-12-15 | 1992-08-24 | Samsung Display Devices Co Ltd | Red light emitting phosphor having adherent pigment and its manufacture |
WO2004059686A1 (en) * | 2002-12-26 | 2004-07-15 | Kabushiki Kaisha Toshiba | Display |
US7202594B2 (en) | 2002-12-26 | 2007-04-10 | Kabushiki Kaisha Toshiba | Display device panel with an emitting fluorescent film composed of red fluorescent particles covered with a red pigment |
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