Electron gun for a color cathode ray tube

Details Electron gun for a color cathode ray tube Electron gun for a color cathode ray tube

1992-09-15

1995-01-17

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, 313460, H01J 2950

Patent

active

053828720

ABSTRACT:
An electron gun for a color cathode ray tube includes a last accelerating electrode having a large-caliber electron beam passing hole for commonly passing red, blue, and green electron beams. Both ends of the beam passing hole include circular arc portions formed with a predetermined curvature. The center portions where the green electron beam passes through protrude by a predetermined width. The length of the protrusion in the horizontal direction satisfies the following inequality: L<H-2R(1+cos .alpha.), where H designates the horizontal width of the large-caliber electron beam passing hole, R is the radius of the circular arc portions and .alpha. is the angle between a line drawn from either center of the circular arc portions to an adjacent apex of the protrusions and a line connecting centers of both circular arc portions. By using the above-described device, the halo of an electron beam landing on a phosphor layer can be decreased, thereby enhancing the resolution of a cathode ray tube adopting the electron gun.

REFERENCES:
patent: 4370592 (1983-01-01), Hughes et al.
patent: 4388552 (1983-06-01), Greninger
patent: 4764704 (1988-08-01), New et al.
patent: 5013963 (1991-05-01), Ikegami et al.
patent: 5262702 (1993-11-01), Shimoma et al.

Affiliated with

Also associated with

Rating

Electron gun for a color cathode ray tube does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electron gun for a color cathode ray tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron gun for a color cathode ray tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-749125