Narrow-neck CRT having a large stem pin circle

Details Narrow-neck CRT having a large stem pin circle Narrow-neck CRT having a large stem pin circle

1999-10-20

2000-06-20

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Envelope

31331801, 31331805, H01J 3100

Patent

active

060781343

ABSTRACT:
A cathode ray tube has a vacuum envelope including a panel portion having a phosphor screen, a neck portion having a stem fused and sealed to one end thereof, and a funnel portion for connecting the other end of the neck portion and the panel portion. The stem includes plural stem pins annularly arrayed, sealed thereto and extending therethrough for supporting an electron gun in the neck portion. An outside diameter of the neck portion in a region thereof facing a major portion of the electron gun is not more than 29.1 mm. A stem mound is raised and formed integrally with the stem around a base of each of the stem pins on an electron-gun-supporting side thereof. A first distance R1 and a second distance R2 satisfy a relationship, 0<R1-R2<2.1 mm, where the first distance R1 is a distance from the center axis of the neck portion to an inner wall in the region of the neck portion facing the major portion of the electron gun and the second distance R2 is a distance from the center axis to an outside edge of the stem mound as measured at half an axial height of the stem mound. The number of stem pins can be ten and the plural stem pins can include two stem pins for applying focus voltages to two focus electrodes of the electron gun.

REFERENCES:
patent: 4040707 (1977-08-01), Pisano
patent: 4504763 (1985-03-01), Nakanishi et al.
patent: 5777430 (1998-07-01), Ueda et al.
patent: 5818155 (1998-10-01), Kawamura et al.

Affiliated with

Also associated with

Rating

Narrow-neck CRT having a large stem pin circle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Narrow-neck CRT having a large stem pin circle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Narrow-neck CRT having a large stem pin circle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1855807