Patent ID: 6396204
Filing Date: 2002-05-28
Classification: H01J

Abstract:
A cathode ray tube comprising:a panel having an inner phosphor screen and a rear portion; a funnel connected to the rear portion of the panel, the funnel sequentially having a body with a large-sized end and a small-sized end, and a cone portion with a large-sized end and a small-sized end, the large-sized end of the body being sealed to rear portion of the panel, the small-sized end of the body meeting the large-sized end of the cone portion at a point, the meeting point of the body and the cone portion being an inflection point of the funnel; a neck sealed to the small-sized end of the cone portion; an electron gun fitted within the neck to produce electron beams, the electron gun having a final accelerating electrode; and a deflection yoke mounted around the cone portion of the funnel; wherein the funnel is structured to satisfy the following condition: 1.16&lE;((D/2)/tan(&PHgr;/2))/(FGâˆ’TN)&lE;1.35 where D indicates the size of an effective area of the phosphor screen, FG indicates the distance between the large-sized end of the body and the final accelerating electrode of the electron gun, TN indicates the distance between the small-sized end of the cone portion and the inflection point of the funnel, and &PHgr; indicates the electron beam deflection angle.