GB1432179A - Colour cathode ray tubes - Google Patents

Colour cathode ray tubes

Info

Publication number
GB1432179A
GB1432179A GB2578973A GB2578973A GB1432179A GB 1432179 A GB1432179 A GB 1432179A GB 2578973 A GB2578973 A GB 2578973A GB 2578973 A GB2578973 A GB 2578973A GB 1432179 A GB1432179 A GB 1432179A
Authority
GB
United Kingdom
Prior art keywords
slits
sections
sheet
steel
shadow mask
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
Application number
GB2578973A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of GB1432179A publication Critical patent/GB1432179A/en
Expired legal-status Critical Current

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
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/076—Shadow masks for colour television tubes characterised by the shape or distribution of beam-passing apertures
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

1432179 Making colour picture tubes TOKYO SHIBAURA ELECTRIC CO Ltd 30 May 1973 [30 May 1972] 25789/73 Heading B3A [Also in Division H1] In a colour cathode-ray picture tube of the type having stripes of phosphor and a shadow mask having corresponding slits, the slits are divided into sections by transverse bridge members and the slit sections have cross-sections on the lines 5B-5B and 5C-5C as shown respectively in Figs. 6B and 5C, the distance h 2 being substantially half the thickness of the mask. A photographic etching process for making the shadow mask comprises photographically printing on opposite sides of a sheet of steel patterns of rectangles of different sizes but of corresponding pattern on a photosensitive resin which is then removed from the steel in the regions where the slits are to be formed. The sheet is then etched and it is described how the etching, which takes place through the plate and also laterally, results in the desired slit configuration.
GB2578973A 1972-05-30 1973-05-30 Colour cathode ray tubes Expired GB1432179A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47053034A JPS519264B2 (en) 1972-05-30 1972-05-30

Publications (1)

Publication Number Publication Date
GB1432179A true GB1432179A (en) 1976-04-14

Family

ID=12931591

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2578973A Expired GB1432179A (en) 1972-05-30 1973-05-30 Colour cathode ray tubes

Country Status (4)

Country Link
US (1) US3882347A (en)
JP (1) JPS519264B2 (en)
FR (1) FR2186728B1 (en)
GB (1) GB1432179A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973965A (en) * 1972-05-30 1976-08-10 Tokyo Shibaura Electric Co., Ltd. Making shadow mask with slit-shaped apertures for CRT
JPS5727574B2 (en) * 1974-03-13 1982-06-11
JPS5310961A (en) * 1976-07-19 1978-01-31 Hitachi Ltd Color picture tube
US4296189A (en) * 1979-05-24 1981-10-20 Rca Corporation Color picture tube having improved slit type shadow mask and method of making same
US4293792A (en) * 1979-12-18 1981-10-06 Rca Corporation Color picture tube having improved slit type shadow mask
US4300069A (en) * 1979-12-18 1981-11-10 Rca Corporation Color picture tube having improved slit type shadow mask and method of making same
US4389592A (en) * 1980-05-12 1983-06-21 Buckbee-Mears Company Color picture tube and aperture mask therefor
JPS577041A (en) * 1980-05-12 1982-01-14 Buckbee Mears Co Structure with visual sense opening line and method of manufacturing same
US4632726A (en) * 1984-07-13 1986-12-30 Bmc Industries, Inc. Multi-graded aperture mask method
DE19603439C2 (en) * 1996-02-01 1998-12-17 Danubia Petrochem Polymere Structural Isomeric Poly (alkylethylene)
CN1053522C (en) * 1996-02-16 2000-06-14 北京·松下彩色显象管有限公司 Shadow mask for color cathode-ray tube
KR20060109100A (en) * 2005-04-15 2006-10-19 삼성에스디아이 주식회사 Shadow mask for cathode ray tube

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2690518A (en) * 1953-06-01 1954-09-28 Columbia Broadcasting Syst Inc Color picture tube
DE2012046A1 (en) * 1969-03-14 1970-10-01 Tokyo Shibaura Electric Co. Ltd., Kawasaki (Japan) Shadow mask color picture tube and process for their manufacture
US3652895A (en) * 1969-05-23 1972-03-28 Tokyo Shibaura Electric Co Shadow-mask having graduated rectangular apertures

Also Published As

Publication number Publication date
JPS4911275A (en) 1974-01-31
FR2186728A1 (en) 1974-01-11
DE2327647B2 (en) 1977-02-10
US3882347A (en) 1975-05-06
DE2327647A1 (en) 1973-12-13
FR2186728B1 (en) 1976-06-11
JPS519264B2 (en) 1976-03-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930529