Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1984-04-19
1986-11-04
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313403, 313408, H01J 2980
Patent
active
046212140
ABSTRACT:
A cathode-ray tube includes a display screen having an array of phosphor stripes of three different emission colors arranged in cyclic order in adjacent triads. The tube further includes an electron gun for producing three convergent inline electron beams directed toward the display screen. A color selection structure is positioned between the display screen and the electron gun. The color selection structure includes a metal masking plate having therein an array of apertures arranged in columns that are substantially parallel to the phosphor stripes. The color selection structure further includes beam-influencing strips of insulation disposed on the masking plate which, in combination with the masking plate, define an array of windows for transmitting therethrough portions of the electron beams. A high voltage contact is provided for applying a potential to the metal masking plate and to the display screen. The strips of insulation are parallel to the phosphor stripes of the display screen. The strips of insulation are charged to a focusing potential by secondary electrons incident thereon and emanating from the display screen as a result of impingement thereon of the electron beams from the electron gun.
REFERENCES:
patent: Re25091 (1961-11-01), Ramberg
patent: 2886730 (1959-05-01), Sheldon
patent: 2908838 (1959-10-01), Nordberg
patent: 2942130 (1960-06-01), Sheldon
patent: 2971117 (1961-02-01), Law
patent: 3688359 (1972-09-01), Oikawa et al.
patent: 4059781 (1977-11-01), van Alphen et al.
patent: 4066923 (1978-01-01), van Esdonk
patent: 4107569 (1978-08-01), Ronde
patent: 4112563 (1978-09-01), van Esdonk
patent: 4128790 (1978-12-01), Steeghs
patent: 4188562 (1980-02-01), Van Oostrum
patent: 4427918 (1984-01-01), Lipp
Bloom Stanley
Hockings Eric F.
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
Moore David K.
RCA Corporation
Whitacre Eugene M.
LandOfFree
Color selection means having a charged insulator portion for a c 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 selection means having a charged insulator portion for a c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color selection means having a charged insulator portion for a c will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-698303