Patent ID: 6339293
Filing Date: 2002-01-15
Classification: H01J

Abstract:
A cathode ray tube comprising:an electron beam formation portion for forming and emitting at least one electron beam; an electron gun assembly having a main electron lens section for accelerating and focusing the electron beam; and a deflecting yoke for generating a deflecting magnetic field for deflecting the electron beam emitted from the electron gun assembly in the horizontal and vertical directions on a screen; wherein the main electron lens section comprises first, second, third and fourth grids, a middle first voltage being applied to the first grid, an anode voltage being applied to the fourth grid, the adjacent second grid and the third grid being connected by a resistor, second and third voltages of substantially the same potential, corresponding to voltages higher than the first voltage and lower than the anode voltage, being applied to the second and third grids; a first lens region being formed between the first grid and the second grid; a third lens region being formed between the third grid and the fourth grid; a second lens region being formed between the second grid and the third grid; and an asymmetrical lens being provided in this second lens region.