Patent ID: 6943489

Claim:
A CRT device comprising: a cold cathode electron gun that includes (a) an emitter electrode from which electrons are emitted, (b) a gate electrode that is disposed on a display screen side in a tube axis direction relative to the emitter electrode, and is operable to control the emission of the electrons from the emitter electrode, (c) a peripheral focusing electrode that is disposed on the emitter electrode with an insulating layer interposed therebetween, is disposed on the display screen side in the tube axis direction relative to the emitter electrode, is thicker than the gate electrode, and surrounds the gate electrode, and (d) an accelerating electrode that is disposed on the display screen side in the tube axis direction relative to the peripheral focusing electrode; and a voltage applying unit operable to apply a voltage to each of the accelerating electrode, the gate electrode, and the peripheral focusing electrode, so as to form a crossover by making the voltage of the accelerating electrode higher than the voltages of the gate electrode and the peripheral focusing electrode.