Shadow mask of color CRT
AssigneeLG. Philips Displays
InventorSu-Dong Kang
Life of this patent
Estimating the term…
Abstract
The color cathode-ray tube includes a panel having a fluorescent screen formed on the inner surface thereof, a funnel coupled to the panel, an electron gun mounted into the neck portion of the funnel for emitting electron beams toward the fluorescent screen, and a shadow mask mounted on the fluorescent screen formed on the inner surface of the panel and having a predetermined distance from the fluorescent screen for carrying out color selection. The shadow mask is in a rectangular shape having a longer axis and a shorter axis and including a plurality of beam through apertures. The vertical pitch of the beam through apertures is between 0.15 mm and 0.35 mm. The vertical pitch of the beam through apertures increases as it goes from the central portion to the end portion of the shorter axis of the shadow mask.
Claims34
A color cathode-ray tube including a panel having a fluorescent screen formed on the inner surface thereof, a funnel coupled to the panel, an electron gun mounted into the neck portion of the funnel for emitting electron beams toward the fluorescent screen, and a shadow mask mounted on the fluorescent screen formed on the inner surface of the panel and having a predetermined distance from the fluorescent screen for carrying out color selection,
- wherein the shadow mask is a roughly rectangular shape having a longer axis and a shorter axis and including a plurality of beam through apertures and the vertical pitch of the beam through apertures being between 0.15 mm and 0.35;
- and
- the vertical pitch of the beam through apertures increases as it goes from the central portion to the end portion of the shorter axis of the shadow mask.
A color cathode-ray tube including a panel having a fluorescent screen formed on the inner surface thereof, a funnel coupled to the panel, an electron gun mounted into the neck portion of the funnel for emitting electron beams toward the fluorescent screen, and a shadow mask mounted on the fluorescent screen formed on the inner surface of the panel and having a predetermined distance from the fluorescent screen for carrying out color selection,
- wherein the shadow mask is a roughly rectangular shape having a longer axis and a shorter axis and including a plurality of beam through apertures, the vertical pitch of the beam through apertures being between 0.15 mm and 0.35 mm;
- and
- the vertical pitch of the beam through apertures increases as it goes along the diagonal direction from the central portion to the corner portion of the shadow mask.
A color cathode-ray tube including a panel having a fluorescent screen formed on the inner surface thereof, a funnel coupled to the panel, an electron gun mounted into the neck portion of the funnel for emitting electron beams toward the fluorescent screen, and a shadow mask mounted on the fluorescent screen formed on the inner surface of the panel and having a predetermined distance from the fluorescent screen for carrying out color selection,
- wherein the shadow mask is a roughly rectangular shape having a longer axis and a shorter axis and including a plurality of beam through apertures, the vertical pitch of the beam through apertures being between 0.15 mm and 0.35 mm;
- and
- the vertical pitch of the beam through apertures formed at the central portion of the shadow mask is smaller than the vertical pitch of the beam through apertures formed at the end portion of the shorter axis of the shadow mask, the vertical pitch of the beam through apertures formed at the central portion of the shadow mask being smaller the vertical pitch of the beam through apertures formed at the corner portion of the shadow mask.
Dependencies are inferred from the claim text.