Patent ID: 6583548
Filing Date: 2003-06-24
Classification: H01J

Abstract:
An in-line type electron gun in a color cathode ray tube, comprising:a pre-focusing lens part having at least two electrodes for focusing electron beams; a main lens part having two or more electrodes for focusing the electron beams onto a screen; and at least one electrostatic field controlling electrode in the electrodes of the main lens part having a center electron beam pass through hole and two outer electron beam pass through holes, wherein each of the outer electron beam pass through holes has a form of a circular hole and a rectangular hole combined therein, the rectangular hole having a height â€˜V2â€™ greater than a vertical diameter â€˜V1â€™ of the center beam pass through hole of the electrostatic field controlling electrode, wherein the center electron beam pass through hole is circular or elliptical.