Patent ID: 6476543
Filing Date: 2002-11-05
Classification: H01J

Abstract:
A cathode ray tube comprising an evacuated envelope including a panel portion, a neck portion and a funnel portion for connecting said panel portion and said neck portion, a phosphor screen formed on an inner surface of said panel portion, and an electron gun housed in said neck portion;said electron gun comprising an electron beam generating section having a cathode, an electron beam control electrode and an accelerating electrode arranged in the order named for projecting an electron beam toward said phosphor screen, and an electron beam focusing section for focusing said electron beam from said electron beam generating section onto said phosphor screen, said electron beam generating section and said electron beam focusing section being mounted in predetermined spaced relationship on a plurality of insulator support rods, said electron beam focusing section including at least one compound electrode comprising a first electrode member, a second electrode member and a plate-like electrode member sandwiched therebetween, said plate-like electrode member being fabricated from a material thicker than materials from which said first electrode member and said second electrode member are fabricated, said plate-like electrode member being laser-welded to said first and second electrode members at points of edges of said first and second electrode members, said points of edges of said first and second electrode members being positioned so as not to face mounting tabs of said plate-like electrode member embedded in said plurality of insulator support rods, and edges of said plate-like electrode member extending by an approximately equal distance outwardly beyond said points of edges of said first and second electrode members welded to said plate-like electrode member.