GB1350667A - Method of making colour screens - Google Patents
Method of making colour screensInfo
- Publication number
- GB1350667A GB1350667A GB3220571A GB3220571A GB1350667A GB 1350667 A GB1350667 A GB 1350667A GB 3220571 A GB3220571 A GB 3220571A GB 3220571 A GB3220571 A GB 3220571A GB 1350667 A GB1350667 A GB 1350667A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- resist
- areas
- phosphors
- regions
- 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
- 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
- H01J9/2272—Devices for carrying out the processes, e.g. light houses
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
1350667 Luminescent screens SONY CORP 8 July 1971 [11 July 1970] 32205/71 Heading H1D The manufacture of a colour screen for a colour picture tube having a shadow mask wherein the screen including a light absorbing layer with holes of diameter less than that of the shadow mask apertures comprises applying a photoresist layer, irradiating with light from point or extended source through the mask, developing to form a plurality of resist dots, forming a light absorbing layer on the entire face, and removing said dots to leave an apertured light absorbing layer, characterized in that the light source is moved in a circle in turn about the axes corresponding to the red, green and blue phosphor systems respectively. The photoresist material may be rendered insoluble when exposed to light and the circle radius r may be 0 < r <#/#-1.a where # is the ratio of the light source to face spacing to light source to mask spacing and a is the aperture radius. When the resist is rendered soluble by light, the circle radius r < #/#-1.a. The latter forms annular exposed regions with inner diameters (e.g. 280Á) smaller than the mask apertures of 380Á diameter. Initially (Figs. 4A-4J, not shown) continuous positive resist layer (11) is laid, exposed rings (13G) formed about areas (12G) for green phosphor occupation, corresponding (13B), (13R) regions formed, exposed areas removed by alkaline solution, and graphite layer (15) added. The resist sensitization is inverted trapezoid due to increase of light absorption with depth, sharp edges (14a) ensuring accuracy. Then light irradiates the outer face to sensitize regions (14), the layer developed by alkaline solution to remove regions (14) and associated graphite (15A) producing light absorbing regions at areas not to be occupied by the phosphors. The phosphors are deposited by resist slurries, Al film (22) formed through intermediate film (21) of acrylate resin then removed by baking. Larger green phosphor dots to compensate for lower brightness may be provided by increasing the gyration radius. With a negative resist and r < #/#-1.a, formation is as in Figs. 5A to 5J, (not shown) producing resist areas (33) after water development at areas to be phosphor occupied, covering with graphite (34) and hydrogen peroxide developed to remove areas (33) and associated graphite coverings, and photosensitive slurries utilized to provide phosphors (37R), (37G), (37B). Similarly, one set of phosphors may be of greater area than the others. Fig. 6 (not shown) illustrates a rotary lamp source with lamp house (40) enclosing point or extended light (41) (e.g. super high pressure Hg arc lamp), shift means (43) rotating support (42) and sliding same in x-y direction by micrometers (50) and (51), means (43) being mounted on rotary unit (45) rotatable on fixed shaft (44) and with pulley (47<SP>1</SP>) driven by synchronous motor (46). Second shift means (53) moves fixed shaft (44) in the x and y directions by micrometers (55), (56). Inlet and outlet pipes (57) and (58) discharge cooling water. Shift means (60) effects repositioning for the different phosphors, while reference numeral (61) indicates a correcting lens.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6073770 | 1970-07-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1350667A true GB1350667A (en) | 1974-04-18 |
Family
ID=13150858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3220571A Expired GB1350667A (en) | 1970-07-11 | 1971-07-08 | Method of making colour screens |
Country Status (6)
Country | Link |
---|---|
US (1) | US3853560A (en) |
CA (1) | CA961335A (en) |
DE (1) | DE2134410A1 (en) |
FR (1) | FR2112900A5 (en) |
GB (1) | GB1350667A (en) |
NL (1) | NL7109619A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4152154A (en) * | 1970-06-05 | 1979-05-01 | U.S. Philips Corporation | Method of optically projecting a pattern of substantially circular apertures on a photosensitive layer by rotating light source |
US3953621A (en) * | 1974-03-21 | 1976-04-27 | Gte Sylvania Incorporated | Process of forming cathode ray tube screens |
US4119480A (en) * | 1976-05-13 | 1978-10-10 | Tokyo Shibaura Electric Co., Ltd. | Method of manufacturing thick-film circuit devices |
US4223083A (en) * | 1977-12-27 | 1980-09-16 | Tektronix, Inc. | Virtual mask exposure system for CRT screen manufacture |
CN114205573B (en) * | 2021-11-29 | 2024-04-30 | 信利光电股份有限公司 | Lens shading correction method for camera imaging into circular picture and camera module |
FR3130039A1 (en) | 2021-12-03 | 2023-06-09 | Psa Automobiles Sa | ESTIMATING CELLULAR BATTERY INFORMATION |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA573621A (en) * | 1959-04-07 | G. Koosman Joseph | Arc light source | |
US2733366A (en) * | 1956-01-31 | Grimm ctal | ||
US926377A (en) * | 1908-07-23 | 1909-06-29 | Eugen Albert | Process for making autotype printing-blocks. |
NL206671A (en) * | 1955-04-27 | |||
US3152900A (en) * | 1958-11-14 | 1964-10-13 | Rca Corp | Art of making electron-sensitive mosaic screens |
US3146368A (en) * | 1961-04-04 | 1964-08-25 | Rauland Corp | Cathode-ray tube with color dots spaced by light absorbing areas |
US3558310A (en) * | 1967-03-29 | 1971-01-26 | Rca Corp | Method for producing a graphic image |
US3615461A (en) * | 1968-11-06 | 1971-10-26 | Zenith Radio Corp | Method of processing a black surround screen |
US3615462A (en) * | 1968-11-06 | 1971-10-26 | Zenith Radio Corp | Processing black-surround screens |
US3615460A (en) * | 1968-11-06 | 1971-10-26 | Zenith Radio Corp | Method of forming a black surround screen |
US3725106A (en) * | 1970-10-30 | 1973-04-03 | Matsushita Electronics Corp | Method and apparatus of making color cathode ray tube |
-
1971
- 1971-07-08 GB GB3220571A patent/GB1350667A/en not_active Expired
- 1971-07-09 DE DE19712134410 patent/DE2134410A1/en active Pending
- 1971-07-09 CA CA117,836A patent/CA961335A/en not_active Expired
- 1971-07-09 US US00161085A patent/US3853560A/en not_active Expired - Lifetime
- 1971-07-12 NL NL7109619A patent/NL7109619A/xx unknown
- 1971-07-12 FR FR7125496A patent/FR2112900A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA961335A (en) | 1975-01-21 |
FR2112900A5 (en) | 1972-06-23 |
US3853560A (en) | 1974-12-10 |
NL7109619A (en) | 1972-01-13 |
DE2134410A1 (en) | 1972-01-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |