Patent ID: 6617778
Filing Date: 2003-09-09
Classification: H01J

Abstract:
An electron gun assembly for a cathode ray tube comprising a plurality of electrodes including a control electrode, an accelerating electrode, a third grid electrode, and a fourth grid electrode having a predetermined thickness in order to form, focus, and accelerate electron beams by inducing electrons emitted from cathodes to pass through electron beam passing apertures, said accelerating electrode being provided with at least one electron beam passing aperture having a recess formed elongated in a horizontal direction with respect to said electron beam passing aperture, wherein the electrode gun assembly satisfies the following equation:2.8&lE;D/W+T/A&lE;3.2 where D is a depth of the recess of the accelerating electrode, W is a length of a vertical width of the recess, T is a thickness of the fourth grid electrode, and A is a diameter of the electron beam-passing aperture of the accelerating electrode.