Patent ID: 6903501
Filing Date: 2005-06-07
Classification: H01J

Abstract:
1. An electron gun for a cathode ray tube comprising: a cathode for emitting thermal electrons; a first electrode adjacent the cathode; a second electrode adjacent the first electrode to receive a screen voltage and control the emission of thermal electrons from the cathode; a third electrode adjacent the second electrode; a fourth electrode adjacent the third electrode to receive a focus voltage; and a fifth electrode partially surrounding the fourth electrode while being adjacent the fourth electrode to receive an anode voltage together with the third electrode; wherein the second electrode has a bottom portion with a stepped portion surrounding a hole for guiding the electron beams while being protruded toward the first electrode, and a sidewall portion extended from the periphery of the bottom portion toward the third electrode; wherein the first electrode and the second electrode are structured to satisfy the following condition: T(mm) indicating the thickness of the bottom portion of the second electrode, and G(mm) indicating the distance between the first and the second electrodes.