Patent ID: 6091379
Filing Date: 2000-07-18
Classification: H01J

Abstract:
An electron gun comprising: a plurality of cathodes for emitting electron beams;a first controlling electrode having a first aperture that controls an emission radius of the electron beams;an accelerating electrode having a second aperture with a substantially same diameter to a diameter of the first aperture, that accelerates the electron beams;a second controlling electrode disposed between the cathodes and the first controlling electrode, having a third aperture with a diameter greater than the diameter of the first aperture, that controls the emission radius of the electron beams;a power supplying part having a plurality of powers, each power having a different level; anda selecting part that selects one of the plurality of powers in response to a mode determined in response to an input video signal, applies the selected power to the first controlling electrode and controls the emission radius of the electron beams in accordance with the difference between a power level of the first controlling electrode and a power level of the second controlling electrode.