Electron gun with a multi-media monitor

An electron gun used with a multi-media monitor, the electron gun comprising:

• a cathode;
• a control electrode;
• a screen electrode;
• and
• a plurality of focusing electrodes to focus and accelerate an electron beam and satisfy the condition that 0.222≦β<0.316, where β=T1/D, T1 denotes a thickness of the control electrode, and D denotes a diameter of an electron beam aperture of the control electrode,
• wherein a zero voltage is applied to the control electrode, a voltage of approximately 600V is applied to the screen electrode, and a cathode spot cutoff voltage of 50-80V is applied to the cathode.

An electron gun used with a multi-media monitor, the electron gun comprising:

• a cathode;
• a control electrode;
• a screen electrode;
• and
• a plurality of focusing electrodes to focus and accelerate an electron beam and satisfy the condition that a value of M is greater than or equal to 0.222, where M is the quotient of dividing T1 by DS=2×(A/C)0.5, T1 denotes a thickness of the control electrode, A denotes an area of an electron beam aperture of the control electrode, and C denotes the circumference of the electron beam aperture of the control electrode.

An electron gun used with a multi-media monitor, the electron gun comprising:

• a cathode;
• a control electrode;
• a screen electrode;
• and
• a plurality of focusing electrodes to focus and accelerate an electron beam and satisfy the condition that 0.222≦M<0.316, where M is the quotient of dividing T1 by DS=2×(A/C)0.5, T1 denotes a thickness of the control electrode, A denotes an area of an electron beam aperture of the control electrode, and C denotes the circumference of the electron beam aperture of the control electrode,
• wherein a zero voltage is applied to the control electrode, a voltage of approximately 600V is applied to the screen electrode, and a cathode spot cutoff voltage of 50-80V is applied to the cathode.

An electron gun used with a multi-media monitor, the electron gun comprising:

• a cathode;
• a control electrode;
• a screen electrode;
• and
• a plurality of focusing electrodes to focus and accelerate an electron beam and satisfy the condition that a value of k is greater than or equal to 0.11, where k=T1/L, T1 denotes a thickness of the control electrode, and L denotes the distance between a beam-entering surface of the control electrode and a beam-emitting surface of the screen electrode.

An electron gun used with a multi-media monitor, the electron gun comprising:

• a cathode;
• a control electrode;
• a screen electrode;
• and
• a plurality of focusing electrodes to focus and accelerate an electron beam and satisfy the condition that 0.11≦k<0.135, where k=T1/L, T1 denotes a thickness of the control electrode, and L denotes the distance between a beam-entering surface of the control electrode and a beam-emitting surface of the screen electrode, wherein a zero voltage is applied to the control electrode, a voltage of approximately 600V is applied to the screen electrode, and a cathode spot cutoff voltage of 50-80V is applied to the cathode.