Cathode ray tube and manufacturing method of deflection coil
AssigneeLG.Philips Displays Korea Co., Ltd.
InventorSe Cheon Lim
Life of this patent
Estimating the term…
Abstract
A cathode ray tube comprises a panel having a fluorescent screen on an inner surface; a funnel connected to the panel, an electron gun housed in the funnel; emitting electron beams; and a shadow mask for selecting colors of the electron beams emitted from the electron gun, wherein the deflection yoke comprises a deflection coil for deflecting the electron beams in horizontal and vertical directions, a holder for insulating the deflection coil, and a ferrite core for reducing a magnetic field generated by the deflection coil, and an opening is formed on a flange portion of an opening section on a screen side of the deflection coil.
Claims16
A cathode ray tube, comprising:
- a deflection yoke;
- a panel having a fluorescent screen on an inner surface;
- a funnel connected to the panel, an electron gun housed in the funnel;
- emitting electron beams;
- and a shadow mask for selecting colors of the electron beams emitted from the electron gun, wherein the deflection yoke comprises a deflection coil for deflecting the electron beams in horizontal and vertical directions, a holder for insulating the deflection coil, and a ferrite core for reducing a magnetic field generated by the deflection coil, and an opening is formed on a flange portion of an opening section on a screen side of the deflection coil;
- wherein a maximum length of the flange portion of the opening section on the screen side of the deflection coil, L, and a length of the flange portion of the opening section on the screen side, starting from the opening to the direction of a neck, H, satisfy a condition of 0.15≦H/L≦0.45.
A cathode ray tube, comprising:
- a deflection yoke;
- a panel having a fluorescent screen on an inner surface;
- a funnel connected to the panel, an electron gun housed in the funnel;
- emitting electron beams;
- and a shadow mask for selecting colors of the electron beams emitted from the electron gun, wherein the deflection yoke comprises a deflection coil for deflecting the electron beams in horizontal and vertical directions, a holder for insulating the deflection coil, and a ferrite core for reducing a magnetic field generated by the deflection coil, and a flange portion of an opening section on a screen side of the deflection coil is split into at least two areas;
- wherein a maximum length of the flange portion of the opening section on the screen side of the deflection coil, L, and a length of the flange portion of the opening section on the screen side, starting from the opening to the direction of a neck, H, satisfy a condition of 0.15≦H/L≦0.45.
A manufacturing method of a deflection coil for deflecting electron beams in horizontal and vertical directions, the method comprising the steps of:
- inserting the deflection coil between an upper former and a lower former;
- and
- forming an opening by inserting a split pin on a flange portion of an opening section on a screen side of the deflection coil;
- wherein the split pin is inserted to a position satisfying a condition of 0.15≦H/L≦0.45, L denoting a maximum length of the flange portion of the opening section on the screen side of the deflection coil, and H denoting a length of the flange portion of the opening section on the screen side, starting from the opening to the direction of a neck.
Dependencies are inferred from the claim text.