Shadow mask in color cathode ray tube
AssigneeLG Electronics Inc.
InventorsYoon San Park, Gwang Heon Ha
Life of this patent
Estimating the term…
Abstract
Shadow mask in a color cathode ray tube, which provides an appropriate picture quality for a set resolution and has an increased overall strength by a bi-curvatured structure with a reinforced center portion, including a curvature structure formed according to a curvature function g1(x, y), the curvature function g1(x, y) including a peripheral curvature function f1(x, y) of the shadow mask having a predetermined curvature and a central curvature function f2(x, y) having an almost flat curvature, both the predetermined curvature and the almost flat curvature being formed according to an inside surface curvature of a panel, and a curvature function f3(x, y) having a curvature which is stable in view of structure.
Claims13
A shadow mask in a color cathode ray tube comprising:
- an intermediate region formed apart from a center with a predetermined distance, the intermediate region having a predetermined radius of curvature;
- a central region continuously formed from the intermediate region, the central region having a radius of curvature smaller than the radius of curvature in the intermediate region;
- and
- a peripheral region formed continuously from the intermediate region, the peripheral region having a radius of curvature smaller than the radius of curvature in the intermediate region.
A cathode ray tube comprising:
- a panel;
- a funnel being fixed to the rear of the panel;
- an electron gun provided in a neck portion of the funnel, and emitting electron beams;
- and
- a shadow mask disposed adjacent to the panel and selectively passing the electron beams, the shadow mask including;
- an intermediate region formed apart from a center with a predetermined distance, the intermediate region having a predetermined radius of curvature;
- a central region continuously formed from the intermediate region, the central region having a radius of curvature smaller than the radius of curvature in the intermediate region;
- and
- a peripheral region formed continuously from the intermediate region, the peripheral region having a radius of curvature smaller than the radius of curvature in the intermediate region.
A cathode ray tube comprising:
- a panel;
- a funnel being fixed to the rear of the panel;
- an electron gun provided in a neck portion of the funnel, and emitting electron beams;
- and
- a shadow mask disposed adjacent to the panel, and selectively passing the electron beams, the shadow mask having a radius of curvature in a short axis which is increased to a predetermined length and is then reduced, between a center region and a peripheral region.
A cathode ray tube comprising:
- a panel;
- a funnel fixed to rear of the panel;
- an electron gun provided in a neck portion of the funnel, and emitting electron beams;
- and
- a shadow mask disposed adjacent to the panel, and selectively passing the electron beams, the shadow mask having a radius of curvature in a diagonal axis which is increased to a predetermined length and is then reduced, between a center region and a peripheral region.
Dependencies are inferred from the claim text.