GB857451A - Improvements in and relating to image-reproducing cathode ray tube apparatus - Google Patents
Improvements in and relating to image-reproducing cathode ray tube apparatusInfo
- Publication number
- GB857451A GB857451A GB37472/56A GB3747256A GB857451A GB 857451 A GB857451 A GB 857451A GB 37472/56 A GB37472/56 A GB 37472/56A GB 3747256 A GB3747256 A GB 3747256A GB 857451 A GB857451 A GB 857451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strips
- phosphor
- light
- areas
- deposited
- 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
-
- 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
- H01J29/327—Black matrix materials
-
- 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
- H01J29/185—Luminescent screens measures against halo-phenomena
-
- 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
-
- 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
- H01J29/34—Luminescent screens provided with permanent marks or references
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/26—Image pick-up tubes having an input of visible light and electric output
- H01J31/46—Tubes in which electrical output represents both intensity and colour of image
-
- 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
- H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/16—Picture reproducers using cathode ray tubes
- H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
- H04N9/24—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position
Abstract
857,451. Cathode-ray tubes. PHILCO CORPORATION. Dec. 7, 1956 [Dec. 7, 1955], No. 37472/56. Class 39(1). In a colour receiver the fluorescent areas such as strips or dots or white areas in a monochrome receiver are spaced apart and the intervening spaces are filled with similarly shaped areas of substantially non light reflecting material, such as ferric oxide, graphite, or unactivated Willemite and the whole of the screen is covered by a heat reflecting layer. The non reflective areas are also opaque to light. The substantially non reflecting material may however, reflect light of low visibility, e.g. the dark red of ferric oxide. It prevents the beam from striking two adjacent phosphor strips ; and if also opaque reduces colour dilution and halation due to ambient light and screen light being multiply reflected in the glass end wall of the tube since it will absorb such light. In a modification, Fig. 3, non-light reflecting strips have different widths and mask off part of the fluorescent light from the observer since the fluorescent material overlaps the rear edges of the opaque strips so compensating for the different light emission efficiencies of the phosphors and achieving colour balance, the red usually having less luminous efficiency than the blue or green phosphors. Alternatively the opaque strips are of uniform width but the phosphor strips of different widths to equalise the light intensities or to over emphasise a particular component colour, or both sets of strips can be of different widths ; in the latter case, the centre to centre spacing of the adjacent phosphor strips is preferably the same so that the beam can be intensity modulated at a single frequency. If the centre to centre spacing is not constant as may be necessary for other reasons a complex modulating frequency is used. In manufacture, the opaque strips 27, Fig. 2 are always deposited first, through a grill, then the phosphor strips also through a grill. A photographic deposition process can be used as in Specification 788,661, or in which each strip is deposited in two layers. A detailed procedure is given involving coating the inner surface of the face plate with photosensitive material, comprising water, polyvinyl alcohol and denatured alcohol known as "Solox" (Registered Trade Mark) and photo-sensitive material, drying, projecting an image of a grill on to the coating to form water soluble and insoluble areas, flowing on a slurry of unactivated Willemite with " Solox " and water, drying, washing with water to remove tmexposed areas, drying, depositing a second layer of photo-sensitive material dry, projecting an image of a grill as before, flowing on a slurry of ferric oxide, water and " Solox " (the slurry of Willemite can also be replaced by ferric oxide), drying washing with water to remove unexposed areas, drying to get the discrete strips of opaque material. To get the phosphor strips the faceplate is again coated with photo-sensitive material, dried, the image of a grill is projected on to it to form soluble and insoluble areas, flowing on a slurry of water, " Solox " and phosphor of first colour, washing to remove the unexposed areas and repeating the process (as with the opaque strips) to get two layered phosphor strips. This is repeated to get the phosphor strips of the two other colours. Then the light reflecting electron permeable and ion stopping Al layer is deposited on the rear surfaces of all the strips, and finally the indexing strips are deposited on the rear surface of the Al layer by a process similar to that for the non light reflecting and phosphor strips. The invention is also applicable to shadow mask receivers with three guns and phosphor dots ; in this case in manufacture the opaque and non- reflecting material is deposited first in a pattern corresponding to the spaces oetween the phosphor dots after which the phosphor dots are deposited in the vacant spaces. The non reflecting material pattern can be formed by projecting the image of the tube mask or of an apertured master plate on to a photo-sensitive layer, the parts exposed to light being subsequently removable by washing. Ferrous oxide is now flowed on and dried and the exposed areas removed by washing. Alternatively the image of a negative mask opaque at the areas to be occupied by the phosphor dots is projected on to the photo-sentitive layer which has opposite characteristics, i.e. the parts not exposed to light being removable by washing, the ferrous oxide being deposited and the said parts being removed by washing. The phosphor dots are now deposited by a conventional method such as silk screening or purely photographic. The silk screen mask or a photographic equivalent thereof is rotated by 120 degrees clockwise for the second phosphor deposit and 240 degrees anticlockwise for the third phosphor deposit. In all embodiments an aluminium layer 26 can be deposited on the rear of the screen and indexing strips 28 of distinctive secondary emission ratio, e.g. MgO, or of light emitting phosphor are deposited on the aluminium layer 26. The particle size of the material of the non light reflecting strips is less than that of the phosphors. The invention can be applied to colour receivers termed " Chromatron " (Registered Trade Mark) having a colour switching and focusing grid near the screen as described in PIRE, January, 1954, page 304, and to post deflection focusing colour tubes with three guns as described in Radio Electronics, December, 1955, page 90, and also to monochromatic tubes having a screen of white phosphor areas backed by an aluminium layer.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US551648A US2842697A (en) | 1955-12-07 | 1955-12-07 | Beam-intercepting structure for cathode ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
GB857451A true GB857451A (en) | 1960-12-29 |
Family
ID=24202124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB37472/56A Expired GB857451A (en) | 1955-12-07 | 1956-12-07 | Improvements in and relating to image-reproducing cathode ray tube apparatus |
Country Status (6)
Country | Link |
---|---|
US (1) | US2842697A (en) |
CH (1) | CH345665A (en) |
DE (1) | DE1059028B (en) |
FR (1) | FR1162743A (en) |
GB (1) | GB857451A (en) |
NL (1) | NL212758A (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2941030A (en) * | 1954-12-17 | 1960-06-14 | Charles A Birch-Field | Color television apparatus |
US3005125A (en) * | 1957-12-05 | 1961-10-17 | Sylvania Electric Prod | Display screen |
US2985784A (en) * | 1958-08-18 | 1961-05-23 | American Optical Corp | Optical image-forming devices |
NL128042C (en) * | 1959-04-30 | |||
US3223872A (en) * | 1962-08-13 | 1965-12-14 | Paramount Pictures Corp | Color screen with electron- and lightabsorptive material separating adjacent color strips |
US3952225A (en) * | 1970-02-24 | 1976-04-20 | Zenith Radio Corporation | Cathode-ray tube having phosphor screen interposed between composite mesh and reflective layer |
US3979630A (en) * | 1971-08-02 | 1976-09-07 | Rca Corporation | Shadow mask color picture tube having non-reflective material between elongated phosphor areas and positive tolerance |
US4070596A (en) * | 1971-08-27 | 1978-01-24 | Tokyo Shibaura Electric Co., Ltd. | In-line plural beams cathode ray tube having color phosphor element strips spaced from each other by intervening light absorbing areas and slit-shaped aperture mask |
JPS5244511B2 (en) * | 1972-08-30 | 1977-11-08 | ||
US3779760A (en) * | 1972-10-02 | 1973-12-18 | Sony Corp | Method of producing a striped cathode ray tube screen |
GB1446774A (en) * | 1973-04-19 | 1976-08-18 | Mullard Ltd | Electron beam devices incorporating electron multipliers |
US4049452A (en) * | 1975-04-23 | 1977-09-20 | Rca Corporation | Reverse-printing method for producing cathode-ray-tube-screen structure |
US4406971A (en) * | 1976-04-20 | 1983-09-27 | Mitsubishi Denki Kabushiki Kaisha | Color cathode ray tube having a reference white fluorescent screen |
CA1267684A (en) * | 1985-09-12 | 1990-04-10 | Hiroshi Kato | Beam-index type color cathode ray tube device |
CN101937821B (en) * | 2010-03-30 | 2012-02-15 | 中山大学 | Fluorescent screen of vacuum equipment and non-adhesive manufacturing method for fluorescent screen |
CN104799818A (en) * | 2015-04-23 | 2015-07-29 | 天津大学 | Position sine wave frequency coding-excited imaging optical measuring system of area array CCD (charge coupled device) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2137118A (en) * | 1933-12-19 | 1938-11-15 | Telefunken Gmbh | Fluorescent screen |
US2388203A (en) * | 1942-09-10 | 1945-10-30 | Philco Radio & Television Corp | Viewing device for cathode-ray tube screens and the like |
US2446791A (en) * | 1946-06-11 | 1948-08-10 | Rca Corp | Color television tube |
US2446440A (en) * | 1947-01-28 | 1948-08-03 | Rca Corp | Color television tube |
US2687360A (en) * | 1951-01-18 | 1954-08-24 | Rauland Corp | Process for making a multicolor fluorescent screen |
US2725421A (en) * | 1952-06-20 | 1955-11-29 | Philco Corp | Color television receiver with noisefree and phase corrected indexing signal |
-
0
- NL NL212758D patent/NL212758A/xx unknown
-
1955
- 1955-12-07 US US551648A patent/US2842697A/en not_active Expired - Lifetime
-
1956
- 1956-10-31 FR FR1162743D patent/FR1162743A/en not_active Expired
- 1956-12-07 GB GB37472/56A patent/GB857451A/en not_active Expired
- 1956-12-07 CH CH345665D patent/CH345665A/en unknown
- 1956-12-07 DE DEP17551A patent/DE1059028B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US2842697A (en) | 1958-07-08 |
CH345665A (en) | 1960-04-15 |
NL212758A (en) | |
FR1162743A (en) | 1958-09-16 |
DE1059028B (en) | 1959-06-11 |
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