Colour display tube

Details Colour display tube Colour display tube

H - Electricity

01

J

313/35.13

H01J 29/58 (2006.01) H01J 29/48 (2006.01) H01J 29/50 (2006.01)

Patent

CA 1216878

12 ABSTRACT: . "Colour display tube" A colour display tube comprising in an evacuated envelope (1) which is composed of a neck (4), a cone (3) and a display window (2), in said neck a system of electron guns (5) with which three electron beams are generated which are situated with their axes in one plane and which are focused by means of a focusing lens field on a display screen (10) provided on the inside of the display window, which focusing lens field is formed between two electrodes (25, 26) of the electron gun system which are situated behind each other along the axes, which electrodes comprise facing outermost edges (32, 33) and three apertures (38, 39, 40, 42, 43, 44) which are symmetrical with respect to the said plane and through which the electron beams pass within these edges in a recessed part (34, 41) extending substantially at right angles to the axes. By making in such a display tube the shape of the central aperture (39, 43) in at least one of the electrodes so that this, in addition to providing a quadrupole component, substan- tially compensates an eight-pole component in the focusing lens field at the area of the central electron beam and making the shape of the outermost apertures in at least one of the electrodes so that this, in addition to providing a quadrupole component, substantially compensates a six-pole component in the focusing lens field at the area of the outermost electron beams, a better spot on the display screen is obtained.

460259

Affiliated with

Also associated with

Rating

Colour display 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 Colour display tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Colour display tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1299662