A cathode ray tube according to the present invention include a cold cathode
electron
gun, the cold cathode electron gun including a cold cathode array for emitting
electrons through field emission, a gate electrode for controlling the field emission,
a first selective electrode provided around the cold cathode array and the gate
electrode, and a second selective electrode opposing the first selective electrode,
and the second selective electrode is adapted to have a lower potential than the
gate electrode and the first selective electrode. In accordance with this configuration,
the divergence of electron beams emitted from any positions in the cold cathode
array can be converged uniformly upon removing electron beams emitted at a great
emission angle. This allows the electron beams thereafter to be made narrower by
an electrostatic lens. As a result, the present invention can provide a cathode
ray tube capable of forming a high-resolution image.
