GB1416753A - Methods of manufacture of colour picture tubes - Google Patents
Methods of manufacture of colour picture tubesInfo
- Publication number
- GB1416753A GB1416753A GB193773A GB193773A GB1416753A GB 1416753 A GB1416753 A GB 1416753A GB 193773 A GB193773 A GB 193773A GB 193773 A GB193773 A GB 193773A GB 1416753 A GB1416753 A GB 1416753A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- outer zone
- exposure
- employed
- zone
- 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
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/153—Multiple image producing on single receiver
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Screen Printers (AREA)
Abstract
1416753 Colour television tubes RCA CORPORATION 15 Jan 1973 [14 Jan 1972] 1937/73 Heading H1D In a photographic method of fabricating the phosphor pattern of the screen of a shadow mask colour tube, in which a photosensitive coating is exposed to a small area light source through the shadow mask, misregister is reduced by exposing a central zone of the screen predominantly but not wholly to a light source positioned at a second order colour centre, and an outer zone of the screen, predominantly but not wholly to a light source positioned at a first order colour centre. Optical intensity filters are employed to permit the exposure of one or the other zone, and preferably for each exposure an appropriate correcting lens is employed further to reduce misregister throughout the relevant zone. Different lighthouses, or a simple, adjustable lighthouse may be employed for the two exposures, and preferably a longer light. source is used for the outer zone, to ensure adequate exposure at the edge of the screen despite a decrease in size of the mask apertures in that region. Exemplary calculations are provided for a case in which, for the exposure of the outer zone, the light source position and the shadow mask contour are chosen to eliminate degrouping error at the corners of the screen. The exposure is then carried out without the use of a correcting lens, whereafter the misregister at other points in the outer zone is determined by employing the screen in a colour tube, and the resulting data employed to design a correcting lens for minimizing misregister throughout the remainder of the outer zone. Reference is made to the possibility of exposing the whole screen to the second order source, but only the outer zone to the first order source, whereby distorted dots are produced in the outer zone to ensure full beam spot landing. The method may be employed for a dot or line screen, and for black-matrix and non-matrix screens.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US21778572A | 1972-01-14 | 1972-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1416753A true GB1416753A (en) | 1975-12-03 |
Family
ID=22812506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB193773A Expired GB1416753A (en) | 1972-01-14 | 1973-01-15 | Methods of manufacture of colour picture tubes |
Country Status (12)
Country | Link |
---|---|
US (1) | US3788847A (en) |
JP (1) | JPS4882767A (en) |
AR (1) | AR195211A1 (en) |
BE (1) | BE793996A (en) |
BR (1) | BR7300283D0 (en) |
CA (1) | CA967049A (en) |
DE (1) | DE2301556A1 (en) |
ES (1) | ES410395A1 (en) |
FR (1) | FR2167935B1 (en) |
GB (1) | GB1416753A (en) |
IT (1) | IT973238B (en) |
NL (1) | NL7217739A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2227361A (en) * | 1988-12-23 | 1990-07-25 | Samsung Electronic Devices | "Manufacture of colour cathode ray tube screens" |
US5010464A (en) * | 1988-12-23 | 1991-04-23 | Samsung Electron Devices Co., Ltd. | ARC length changing apparatus is exposing device and method thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7510272A (en) * | 1975-09-01 | 1977-03-03 | Philips Nv | PROCEDURE FOR MANUFACTURE OF A CATHODE RAY TUBE FOR DISPLAYING COLORED IMAGES AND CATHOD RAY TUBE MADE IN ACCORDANCE WITH THIS PROCESS. |
-
0
- BE BE793996D patent/BE793996A/en unknown
-
1972
- 1972-01-14 US US00217785A patent/US3788847A/en not_active Expired - Lifetime
- 1972-12-19 CA CA159,408A patent/CA967049A/en not_active Expired
- 1972-12-28 NL NL7217739A patent/NL7217739A/xx unknown
- 1972-12-29 IT IT33972/72A patent/IT973238B/en active
-
1973
- 1973-01-05 ES ES410395A patent/ES410395A1/en not_active Expired
- 1973-01-08 AR AR246025A patent/AR195211A1/en active
- 1973-01-11 FR FR7300844A patent/FR2167935B1/fr not_active Expired
- 1973-01-12 JP JP48006969A patent/JPS4882767A/ja active Pending
- 1973-01-12 DE DE2301556A patent/DE2301556A1/en active Pending
- 1973-01-12 BR BR73283A patent/BR7300283D0/en unknown
- 1973-01-15 GB GB193773A patent/GB1416753A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2227361A (en) * | 1988-12-23 | 1990-07-25 | Samsung Electronic Devices | "Manufacture of colour cathode ray tube screens" |
US5010464A (en) * | 1988-12-23 | 1991-04-23 | Samsung Electron Devices Co., Ltd. | ARC length changing apparatus is exposing device and method thereof |
GB2227361B (en) * | 1988-12-23 | 1993-11-17 | Samsung Electronic Devices | Arc length changing apparatus in exposing device and method thereof |
Also Published As
Publication number | Publication date |
---|---|
DE2301556A1 (en) | 1973-07-19 |
BR7300283D0 (en) | 1973-09-27 |
BE793996A (en) | 1973-05-02 |
NL7217739A (en) | 1973-07-17 |
US3788847A (en) | 1974-01-29 |
FR2167935B1 (en) | 1976-08-27 |
ES410395A1 (en) | 1975-12-01 |
AR195211A1 (en) | 1973-09-19 |
IT973238B (en) | 1974-06-10 |
CA967049A (en) | 1975-05-06 |
FR2167935A1 (en) | 1973-08-24 |
JPS4882767A (en) | 1973-11-05 |
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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 |