Structure of electron gun for color cathode ray tube
AssigneeLG. Philips Displays Korea Co., Ltd.
InventorsJin Yeal Choi, Jun Ho Bae
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Abstract
A structure of an electron gun for a color cathode ray tube capable of reducing a drive voltage by creating an optimum relation among a cathode, a first electrode, and a second electrode mounted in the electron gun, and preventing degradation in response to input signals on a high-resolution screen and a focus characteristic.
Claims47
A structure of an electron gun for a color cathode ray tube comprising a fluorescent screen, a shadow mask and the electron gun,
- wherein the fluorescent screen includes a fluorescent film with three-color pixels arranged thereon;
- the shadow mask is a color selecting electrode positioned adjacent to the fluorescent screen;
- the electron gun includes a cathode for emitting three electron beam, a first electrode and a second electrode;
- and the means for forming the main lens includes a plurality of electrodes for focusing the three electron beams onto the fluorescent screen;
- and
- an electron beam passing hole (or through-hole) of the first electrode ranges from 0.06 mm2 to 0.12 mm2, and a gap between the first electrode and the second electrode ranges from 0.12 mm to 0.3 mm.
A structure of an electron gun for a color cathode ray tube comprising a fluorescent screen, a shadow mask and the electron gun,
- wherein the fluorescent screen includes a fluorescent film with three-color pixels arranged thereon;
- the shadow mask is a color selecting electrode positioned adjacent to the fluorescent screen;
- the electron gun includes a cathode for emitting three electron beam, a first electrode and a second electrode;
- and the means for forming the main lens includes a plurality of electrodes for focusing the three electron beams onto the fluorescent screen;
- and
- a gap between the first electrode and the second electrode ranges from 0.12 mm to 0.3 mm, and a coining part is formed on the second electrode.
A structure of an electron gun for a color cathode ray tube comprising a fluorescent screen, a shadow mask and the electron gun,
- wherein the fluorescent screen includes a fluorescent film with three-color pixels arranged thereon;
- the shadow mask is a color selecting electrode positioned adjacent to the fluorescent screen;
- the electron gun includes a cathode for emitting three electron beam, a first electrode and a second electrode;
- and the means for forming the main lens includes a plurality of electrodes for focusing the three electron beams onto the fluorescent screen;
- a thickness, To (mm), of a raw material of the second electrode and a depth, t, of a coining part formed on the second electrode satisfies a relation of t≧0.4×To;
- and
- a gap between the first electrode, and the second electrode ranges from 0.12 mm to 0.3 mm.
A structure of an electron gun for a color cathode ray tube comprising a fluorescent screen, a shadow mask and the electron gun,
- wherein the fluorescent screen includes a fluorescent film with three-color pixels arranged thereon;
- the shadow mask is a color selecting electrode positioned adjacent to the fluorescent screen;
- the electron gun includes a cathode for emitting three electron beam, a first electrode and a second electrode;
- and the means for forming the main lens includes a plurality of electrodes for focusing the three electron beams onto the fluorescent screen;
- an average diameter, D, in the vertical and horizontal directions of an electron beam passing hole formed on the first electrode, a thickness, T(mm), of the electron beam passing hole formed on the first electrode, a gap, B(mm), between the electron beam passing hole formed on the first electrode and an electron beam passing hole formed on the second electrode, a thickness, To(mm) of a raw material of the second electrode, and a depth, t, of a coining part of the second electrode satisfy relations of D3≦(1.54 B+0.17)×T and t≧0.4×To;
- and
- a gap between the first electrode and the second electrode ranges from 0.12 mm to 0.3 mm.
Dependencies are inferred from the claim text.