Color picture tube having an improved inline electron gun

Details Color picture tube having an improved inline electron gun Color picture tube having an improved inline electron gun

1984-08-31

1986-05-20

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313449, 313460, H01J 2950, H01J 2962

Patent

active

045904030

ABSTRACT:
An improved color picture tube has an inline electron gun for generating and directing three electron beams, a center beam and two side beams, along coplanar paths toward a screen of the tube. The gun includes prefocus lens electrodes and main focus lens electrodes for focusing the electron beams. The main focus lens is formed by two spaced electrode members. The improvement includes the combination of features related to these two electrode members. One of the electrodes forming the main focus lens is an internal conductive coating on the neck. The other electrode includes three parts. First, there is a cylindrical portion that is smaller in diameter than the neck and is located in overlapped relation with respect to the conductive internal coating. Second, an apertured portion of the electrode includes three inline apertures which are aligned with the electron beam paths. And third, means are located between the cylindrical and apertured portions for controlling the astigmatism of the focus of the two side beams.

REFERENCES:
patent: 2714176 (1955-07-01), Friend
patent: 2726347 (1955-12-01), Benway
patent: 2726348 (1955-12-01), Benway
patent: 2861208 (1958-11-01), Benway
patent: 3011090 (1961-11-01), Moodey
patent: 3024380 (1962-03-01), Burdick et al.
patent: 3873879 (1975-03-01), Hughes
patent: 4388552 (1983-06-01), Greninger
patent: 4400649 (1983-08-01), Chen

Affiliated with

Also associated with

Rating

Color picture tube having an improved inline electron gun 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 picture tube having an improved inline electron gun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color picture tube having an improved inline electron gun will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2110616