Patent ID: 6774554
Filing Date: 2004-08-10
Classification: H01J

Abstract:
A cathode ray tube comprising a bulb including a front panel and a funnel, and an electron gun,the front panel including a color selection mechanism and phosphors on an inner surface thereof, the funnel having a neck portion and a non-neck portion, the funnel including at least two conductive layers on an inner wall thereof, with at least a portion of each of the at least two conductive layers being in the non-neck portion of the funnel, the electron gun being accommodated in a neck portion of the funnel, the conductive layers having different electric potentials from each other, wherein the conductive layers include a high electric potential layer having a high electric potential and a low electric potential layer having an electric potential lower than that of the high electric potential layer, an insulating region is formed between the high electric potential layer and the low electric potential layer, a resistive layer is further formed between the low electric potential layer and the insulating region, and an electrostatic lens is formed in the funnel by the electric potential difference between the high electric potential layer and the low electric potential layer.