Electric lamp and discharge devices – Cathode ray tube – Screen
Patent
1989-12-22
1990-12-04
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Screen
313467, H01J 2918
Patent
active
049756192
ABSTRACT:
A method of surface-treating dry-powdered phosphor particles to control the triboelectric charge characteristics thereof includes the steps of providing the phosphor particles with a first coating of silica, dissolving a coupling agent selected from the group consisting of silanes and titanates in a suitable solvent to form a mixture, surface-coating the silica-coated phosphor particles with the mixture to provide a second coating of the coupling agent on the phosphor particles, filtering the surface-treated particles, rinsing the surface-treated particles with the solvent, and drying the surface-treated particles. The resultant dry-powdered surface-treated phosphor particles are used to make a luminescent viewing screen for a CRT. The coupling agent overlying the silica coating controls the triboelectric charging characteristics of the phosphor particles during the electrophotographic manufacturing of the screen.
REFERENCES:
patent: 2625734 (1953-01-01), Law
patent: 3475169 (1969-10-01), Lange
patent: 3489556 (1970-01-01), Drozd
patent: 3489557 (1970-01-01), Lange et al.
patent: 3522071 (1970-07-01), Yokota et al.
patent: 3927224 (1975-12-01), Levene
patent: 4049845 (1977-09-01), Lozier et al.
patent: 4287229 (1981-09-01), Watanabe et al.
patent: 4379762 (1984-04-01), Chiyoda et al.
patent: 4440831 (1984-04-01), Brownlow
patent: 4448866 (1984-05-01), Olieslagers et al.
patent: 4620133 (1986-10-01), Morrell et al.
patent: 4707635 (1987-11-01), Tateyama et al.
patent: 4717590 (1988-01-01), Wolfe et al.
patent: 4737434 (1988-04-01), Gruber et al.
patent: 4741984 (1988-05-01), Imai et al.
Datta Pabitra
Friel Ronald N.
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
O'Shea Sandra L.
RCA Licensing Corp.
Tripoli Joseph S.
LandOfFree
Surface treatment of silica-coated phosphor particles and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface treatment of silica-coated phosphor particles and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface treatment of silica-coated phosphor particles and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-884972