Patent ID: 6525463
Filing Date: 2003-02-25
Classification: H01J

Abstract:
A flat panel display device comprising:a cathode for emitting electrons: a magnetic plate having a first region and a second region, the first region having a plurality of holes for focusing electrons to be inputted from the cathode to form an electron beam by the magnetic field therein, the second region being formed from a peripheral portion of the magnetic plate, the second region including means for applying the magnetic field to the holes at the peripheral portion of the first region so as to supply a uniform magnetic field to the holes all over the first region; a plurality of grid electrodes for controlling the electrons flowing into the inside of the holes, the grid electrodes being formed between the cathode and the magnetic plate; a screen having a fluorescent layer over a surface thereof facing the magnetic plate, the screen being impacted with the electron beam outputted from the magnetic plate to display an image, the screen having a plurality of pixels; a plurality anodes for accelerating the electrons flowing into the holes, the anode being disposed between the magnetic plate and the screen; and a control signal supplying means for supplying a control signal to the grid electrodes and the anodes to control selectively the stream of electrons impacted on the screen through the holes, wherein the number of the holes of the first region is same as the number of the pixels of the screen.