Electron gun, cathode ray tube, and projector

A cathode ray tube, comprising:

• an electron gun comprising:
• a cathode, suitable for producing a plurality of electrons;
• a beam forming region disposed behind the cathode to make the electrons produced by the cathode become at least an electron beam, wherein the beam forming region sequentially includes a control electrode G1 and a screen electrode G2;
• an electron lens region adjacent to the beam forming region for focusing the electrons of the electron beam, wherein the electron lens region sequentially includes a focusing electrode G3, a focusing electrode G4 and a focusing electrode G5, and the focusing electrode G3 and the focusing electrode G4 partly overlap;
• and
• a high voltage wire disposed in the electron lens region for connecting the focusing electrode G3 and the focusing electrode G5;
• a display screen disposed behind the electron lens region, wherein the surface of the display screen thereon is coated with a fluorescent material;
• and
• a deflection yoke disposed between the electron lens region and the display screen for deflecting the electron beam, such that the electron beam is projected on the display screen and reacts with the fluorescent material to output a color light.

A projector, having a plurality of cathode ray tubes, wherein each cathode ray tube comprises:

• an electron gun comprising:
• a cathode, suitable for producing a plurality of electrons;
• a beam forming region disposed behind the cathode to make the electrons produced by the cathode become at least an electron beam, wherein the beam forming region sequentially includes a control electrode G1 and a screen electrode G2;
• an electron lens region adjacent to the beam forming region for focusing the electrons of the electron beam, wherein the electron lens region sequentially includes a focusing electrode G3, a focusing electrode G4 and a focusing electrode G5, and the focusing electrode G3 and the focusing electrode G4 partly overlap;
• and
• a high voltage wire disposed in the electron lens region for connecting the focusing electrode G3 and the focusing electrode G5;
• a display screen disposed behind the electron lens region, wherein the surface of the display screen thereon is coated with a fluorescent material;
• and
• a deflection yoke disposed between the electron lens region and the display screen for deflecting the electron beam, such that the electron beam is projected on the display screen and reacts with the fluorescent material to output a color light.