Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Physical developing
Patent
1982-07-30
1984-10-09
Mathews, A. A.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Physical developing
430 26, 313634, G03C 500, G03B 4100
Patent
active
044757972
ABSTRACT:
This disclosure depicts method and apparatus useful in fabricating a screen of a color cathode ray tube of the slot mask, stripe-screen type and more particularly method and apparatus for exposing a photosensitive coating on the concave inner surface of the faceplate of such a tube through a slot mask serving as an exposure master. Latent screen stripe images are formed whose width increases with increasing radial distance along the screen "pitch" axis perpendicular to the screen stripe images. The method comprises supporting a curved faceplate which has on its concave inner surface a photosensitive coating; supporting adjacent the faceplate inner surface a slot mask defining an array of columns of spaced slots; supporting a line source of radiation actinic to said coating on or near a central axis of the faceplate and spaced from said coating, with the source axis aligned parallel to said columns of spaced slots in said mask, said light source producing a linear light-emitting volume having a major cross-sectional axis which is parallel to the faceplate central axis and a major axis dimension which is substantially greater than the minor cross-sectional axis dimension of said light-emitting volume; and exposing said coating to said light source, such that the latent screen stripe images formed on said coating through said slots, for uniform exposure time and slot width, increase in width in a radial direction away from said screen center along said screen pitch axis.
REFERENCES:
patent: 3146368 (1964-08-01), Fiore
patent: 3587417 (1971-06-01), Balder
patent: 3590303 (1971-06-01), Coleclough
patent: 3601018 (1971-08-01), Lange
patent: 3667947 (1972-06-01), McKee
patent: 3838432 (1974-09-01), Park
patent: 3856525 (1974-12-01), Inoue
patent: 3885181 (1975-05-01), Nelson
patent: 3888673 (1975-06-01), Suzuki et al.
patent: 3890151 (1975-06-01), Suzuki et al.
patent: 3947718 (1976-05-01), van Lent
patent: 3949411 (1976-04-01), Yonai et al.
patent: 4070596 (1978-01-01), Tsuneta et al.
patent: 4078239 (1978-03-01), Prazak et al.
patent: 4132470 (1979-01-01), Heek
patent: 4256390 (1981-03-01), Fisher et al.
"Contoured-Line Screens for Color Picture Tubes", IEEE Transactions on Consumer Electronics, vol. 24, No. 1, 2/1978, pp. 120-125, A. M. Morrell.
Mathews A. A.
O'Connor Cornelius J.
Zenith Electronics Corporation
LandOfFree
Color cathode ray tube screening exposure method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color cathode ray tube screening exposure method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color cathode ray tube screening exposure method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1597028