Patent ID: 6304034
Filing Date: 2001-10-16
Classification: H01J,H04N

Abstract:
A cathode ray tube for performing image display through scanning an effective screen and an over-scan region outside the effective screen by a plurality of electron beams and forming a single screen through joining a plurality of divided screens by partially overlapping each other, the plurality of divided screens being formed by scanning of the plurality of electron beams wherein the cathode ray tube comprises:a plurality of electron guns for radiating the plurality of electron beams;means for detecting electron beams for outputting an optical or electrical signal according to an incidence of the electron beams, which is provided in a position corresponding to the overlap region of the plurality of divided screens in the cathode ray tube; andcontrol means for performing position control of the plurality of divided screens and modulation control of brilliance in the overlap region of the plurality of divided screens based on the optical or electrical signal outputted from the means for detecting electron beams so that the plurality of divided screens is appropriately joined and displayed.