Electron gun for color cathode ray tube

Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 第１及び第２の電極から構成される四重極レ ンズ部の電極の配置関係を変更することなくダイナミッ クフォーカス電圧の変調量の補正量の不足を招かず、且 つ、四重極レンズ部を斜めに通過する外側電子ビームに 対する非軸対称な収差を低減して外側電子ビームに関す る解像度の向上を図る 【解決手段】 第２の電極Ｇ MV は、基板電極部に、その 第２の電極と対向するグリッドの円形の３つのアパーチ ャと同じ形状の３つのアパーチャの各間及び両外側に、 三原色電子ビームの配列方向に垂直で、中央部が高く、 両外側は低い４枚の平板電極部が植立される。第１の電 極Ｇ MC は、基板電極部に、矩形のアパーチャが形成され ると共に、そのアパーチャの両長辺に沿って互いに平行 で、中央部が高く、両側に行くに従って次第に高さが低 くなる２枚の平板電極部が植立される。 (57) [Problem] To provide a correction amount of a modulation amount of a dynamic focus voltage without changing an arrangement relationship of electrodes of a quadrupole lens unit composed of first and second electrodes, In addition, a non-axially symmetric aberration with respect to the outer electron beam obliquely passing through the quadrupole lens portion is reduced to improve the resolution of the outer electron beam. A second electrode GMV is provided on the substrate electrode portion. , Between and outside each of the three apertures of the same shape as the three circular apertures of the grid facing the second electrode, Perpendicular to the arrangement direction of the three primary color electron beams, the center is high, On both outer sides, four low plate electrodes are planted. The first electrode G MC has a rectangular aperture formed in the substrate electrode portion, is parallel to each other along both long sides of the aperture, has a high central portion, and gradually decreases in height on both sides. Two plate electrodes are planted.

Inventors

• 👤 Yoichi Oshige
• 👤 洋一 大重

Bibliographic Details