GB1040827A - Cathodoluminescent screens - Google Patents
Cathodoluminescent screensInfo
- Publication number
- GB1040827A GB1040827A GB20801/65A GB2080165A GB1040827A GB 1040827 A GB1040827 A GB 1040827A GB 20801/65 A GB20801/65 A GB 20801/65A GB 2080165 A GB2080165 A GB 2080165A GB 1040827 A GB1040827 A GB 1040827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphor
- screen
- microm
- vanadate
- dots
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7794—Vanadates; Chromates; Molybdates; Tungstates
-
- 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
- H01J29/20—Luminescent screens characterised by the luminescent material
-
- 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
- H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
- H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
- H01J29/322—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television with adjacent dots
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
The red phosphor of a three-colour C.R.T. screen comprises a trivalent metal vanadate activated by a rare earth, e.g. the vanadate of yttrium, gadolinium or lutetium activated 1-10, preferably 5m% of europium or proesodymium, or 0.5m% of samarium. The vanadate may have a particle size 2-20, prefarably 8, micron. The blue phosphor may be ZnS: Ag, 7-12 microm, the green phosphor may be Zn, CdS:Ag, 7-12 microm, or ZnSiO3:Mn, and both may be slightly poisoned by 0.5 p.p.m. cobalt. The screen may comprise clusters of dots, each cluster having one dot of each phosphor, and the tube may have three electron guns and an apertured mask adjacent the screen, so that each gun illuminates only the appropriate dot. The preparation of the screen, using U.V. radiation to polymerize dots of polyvinyl alcohol and phosphor, is described, using a dusting or a slurry method (using particles 0.5-7 microm size).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US370804A US3243625A (en) | 1964-05-28 | 1964-05-28 | Cathodoluminescent screens including vanadates of yttrium, gadolinium or lutetium activated with europium or samarium |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1040827A true GB1040827A (en) | 1966-09-01 |
Family
ID=23461262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20801/65A Expired GB1040827A (en) | 1964-05-28 | 1965-05-17 | Cathodoluminescent screens |
Country Status (4)
Country | Link |
---|---|
US (1) | US3243625A (en) |
DE (2) | DE6606181U (en) |
GB (1) | GB1040827A (en) |
NL (1) | NL6506821A (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3331982A (en) * | 1964-10-20 | 1967-07-18 | Sylvania Electric Prod | High pressure electric discharge device having a fill including vanadium |
US3423621A (en) * | 1966-03-07 | 1969-01-21 | Rca Corp | Color picture display containing a red-emitting europium-activated yttrium oxysulfide phosphor |
US3382393A (en) * | 1966-09-08 | 1968-05-07 | Nat Video Corp | Color television tube with faceplate panel of high transmittance in the red color |
US3497749A (en) * | 1966-11-28 | 1970-02-24 | Rca Corp | Color display tube whose blue emitter is a silver-activated zinc sulphide containing only one of magnesium,calcium,strontium and barium |
NL6802411A (en) * | 1967-02-20 | 1968-08-21 | ||
US3579016A (en) * | 1967-10-23 | 1971-05-18 | Gen Telephone & Elect | Postdeflection tube with all rare earth phosphors |
US3517243A (en) * | 1969-03-17 | 1970-06-23 | Texas Instruments Inc | Color display screen employing two layers of phosphors,particles in the inner layer being small with respect to those in the outer layer and discontinuous in coverage |
US4119883A (en) * | 1969-06-30 | 1978-10-10 | Sony Corporation | Cathode ray tube |
JPS48104461A (en) * | 1972-04-14 | 1973-12-27 | ||
JPS5132271A (en) * | 1974-09-13 | 1976-03-18 | Hitachi Ltd | Heimenhyojipaneru no keikotai no fuchakuhoho |
JPS61266488A (en) * | 1985-05-21 | 1986-11-26 | Mitsubishi Electric Corp | Phosphor for cathode ray tube |
US5788881A (en) * | 1995-10-25 | 1998-08-04 | Micron Technology, Inc. | Visible light-emitting phosphor composition having an enhanced luminescent efficiency over a broad range of voltages |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2569939A (en) * | 1951-10-02 | Infbared phosphoks | ||
US2527365A (en) * | 1945-05-22 | 1950-10-24 | Rca Corp | Doubly activated infrared phosphors |
US2462547A (en) * | 1945-08-08 | 1949-02-22 | Polytechnic Inst Brooklyn | Doubly activated infrared phosphors and methods of preparing same |
US2522074A (en) * | 1946-05-03 | 1950-09-12 | Univ Rochester | Method of rendering infrared radiation visible employing doubly activated alkaline earth sulfide phosphors |
US2521124A (en) * | 1946-08-09 | 1950-09-05 | Neville F Miller | Infrared strontium sulfide phosphors |
US2570136A (en) * | 1949-12-22 | 1951-10-02 | Du Pont | Infrared phosphors |
US2569940A (en) * | 1949-12-22 | 1951-10-02 | Du Pont | Infrared phosphors |
US2729605A (en) * | 1953-03-23 | 1956-01-03 | Du Pont | Samarium activated lanthanum oxychloride phosphor |
US3037136A (en) * | 1953-05-04 | 1962-05-29 | Fairchild Camera Instr Co | Cathode ray tube |
US2791565A (en) * | 1953-05-08 | 1957-05-07 | Gen Electric | Luminescent alkaline earth oxides |
US3025161A (en) * | 1955-06-27 | 1962-03-13 | Sylvania Electric Prod | Method of forming patterns |
US3151945A (en) * | 1958-02-03 | 1964-10-06 | Bayer Ag | Process for the production of pure borohydrides |
US2988515A (en) * | 1958-09-29 | 1961-06-13 | Westinghouse Electric Corp | Electroluminescent phosphor |
US2991383A (en) * | 1959-01-05 | 1961-07-04 | Rca Corp | Tri-color phosphor screens of the mosaic variety |
USRE26184E (en) * | 1961-08-07 | 1967-04-04 | Van ultert |
-
1964
- 1964-05-28 US US370804A patent/US3243625A/en not_active Expired - Lifetime
-
1965
- 1965-05-17 GB GB20801/65A patent/GB1040827A/en not_active Expired
- 1965-05-28 DE DE19666606181U patent/DE6606181U/en not_active Expired
- 1965-05-28 DE DEG43729A patent/DE1288629B/en active Pending
- 1965-05-28 NL NL6506821A patent/NL6506821A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE6606181U (en) | 1970-09-03 |
NL6506821A (en) | 1965-11-29 |
DE1288629B (en) | 1969-02-06 |
US3243625A (en) | 1966-03-29 |
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