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GB1372530A - Method of and apparatus for preparing the screen of a colour television picture tube - Google Patents

Method of and apparatus for preparing the screen of a colour television picture tube

Info

Publication number
GB1372530A
GB1372530A GB4835571A GB4835571A GB1372530A GB 1372530 A GB1372530 A GB 1372530A GB 4835571 A GB4835571 A GB 4835571A GB 4835571 A GB4835571 A GB 4835571A GB 1372530 A GB1372530 A GB 1372530A
Authority
GB
United Kingdom
Prior art keywords
mask
screen
light
prisms
light source
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
GB4835571A
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 GB1372530A publication Critical patent/GB1372530A/en
Expired legal-status Critical Current

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

1372530 Luminescent screens TOKYO SHIBAURA ELECTRIC CO Ltd 18 Oct 1971 [20 Oct 1970] 48355/71 Heading H1D A method of preparing the screen of a colour TV C.R.T. comprises using a stationary light source 21, mask 13, optical system 22 and means 23 for mechanically rotating the system to rotate the light source image thereby forming on the panel exposed portions of smaller area than the light permeable portions in the mask. The optical system may include one or two prisms, the latter enabling the diameter of the locus along which the light travels to be adjusted by varying the angle between prisms, Fig. 5 (not shown), or the angle # in a single prism may be varied. The prisms may be in a metal frame with rollers abutting same to effect rotation and including at least three bearings (27), (Fig. 4, not shown), or may be revolved by fluid pressure. A correction lens used is not shown. Black light absorbing layers such as graphite, and R.G.B. fluorescent dots are mentioned as is a mask to screen distance of 10 mm. The absorbing layers may occupy 40 to 50% screen area and screen dot, mask holes and beam dimensions and pitches are given. In the process, graphite deposited on light-exposed PVA may be washed away with hydrogen peroxide. The shadow mask may be of circular hole type or slitted. The spot light source may be a super high pressure Hg lamp using cooling water or compressed air forced cooling.
GB4835571A 1970-10-20 1971-10-18 Method of and apparatus for preparing the screen of a colour television picture tube Expired GB1372530A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9162370 1970-10-20

Publications (1)

Publication Number Publication Date
GB1372530A true GB1372530A (en) 1974-10-30

Family

ID=14031678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4835571A Expired GB1372530A (en) 1970-10-20 1971-10-18 Method of and apparatus for preparing the screen of a colour television picture tube

Country Status (4)

Country Link
US (1) US3736848A (en)
DE (1) DE2152304A1 (en)
FR (1) FR2110028A5 (en)
GB (1) GB1372530A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993487A (en) * 1969-01-03 1976-11-23 Matsushita Electronics Corporation Method for manufacture of color television picture tubes using rotating light source
NL158650B (en) * 1971-05-14 1978-11-15 Philips Nv METHOD AND DEVICE FOR THE MANUFACTURE OF A DISPLAY OF A COLOR TV DISPLAY TUBE.
US4013467A (en) * 1971-06-18 1977-03-22 Matsushita Electronics Corporation Method of manufacturing color picture tubes using rotating light attenuator
JPS5236390B2 (en) * 1972-08-07 1977-09-14
GB1435596A (en) * 1972-08-21 1976-05-12 Tokyo Shibaura Electric Co Method and apparatus for making colour cathode-ray tubes
US3971043A (en) * 1972-08-21 1976-07-20 Tokyo Shibaura Electric Co., Ltd. Apparatus for making electroluminescent screens for color cathode ray tubes
JPS4988465A (en) * 1972-12-25 1974-08-23
GB1446835A (en) * 1974-03-13 1976-08-18 Matsushita Electronics Corp Light exposing apparatus for forming a phosphor screen of a cathode ray tube
GB1521931A (en) * 1976-01-31 1978-08-16 Ferranti Ltd Optical apparatus
JPS5883347A (en) * 1981-11-09 1983-05-19 Canon Inc Photomagnetic recording device
DE3214268A1 (en) * 1982-04-17 1983-10-20 Fa. Carl Zeiss, 7920 Heidenheim OPTICAL ADJUSTMENT
JPH03130940A (en) * 1989-05-24 1991-06-04 Kyocera Corp Method and device for controlling light spot
JPH07272627A (en) * 1994-03-31 1995-10-20 Toshiba Corp Exposure device for forming phosphor screen of color cathode-ray tube

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358175A (en) * 1962-07-06 1967-12-12 Rca Corp Cathode ray tube with mosaic type phosphor screen

Also Published As

Publication number Publication date
DE2152304A1 (en) 1972-07-06
US3736848A (en) 1973-06-05
FR2110028A5 (en) 1972-05-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees