Patent ID: 6184627
Filing Date: 2001-02-06
Classification: H04N

Abstract:
An image display device comprising:an emission source for electron beams;a display screen having a phosphor layer, wherein phosphors are formed in a certain pattern and separated by a black matrix;an electron beam track controlling system, said electron beam track controlling system having the function to selectively irradiate said electron beams onto predetermined positions of said phosphor layer;a system for applying a defined offset to the electron beam track with respect to the phosphor layer at a certain position;a system for detecting an emission amount of said phosphor layer at the certain position generated by said offset electron beam;a system for recognizing a misalignment of said electron beams at an incident position, based on said emission amount;a system for correcting misalignment of said electron beams at the incident position by feedback of said misalignment at the incident position to said electron beam track controlling system.