| 摘要 |
A cathode ray tube includes a bulb including a front panel and a funnel, and an electron gun. The front panel includes a color selection mechanism and phosphors on an inner surface thereof. The funnel includes a conductive layer on an inner wall thereof. The electron gun is accommodated in a neck portion of the funnel. The conductive layer is divided into at least two regions, each of which has a different electric potential. A high electric potential conductive layer having a high electric potential, an insulating region, a resistive layer, and a low electric potential conductive layer having an electric potential lower than that of the high electric potential conductive layer are formed in this order from the panel side to the electron gun side. With this configuration, the two conductive layers do not interfere with each other because of discharge or the like and are independent, and stable voltage can be maintained. Thus, an electrostatic lens can be formed.
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