Sony Corporation

Yuzuru Watanabe

Masahiro Kikuchi

Satoshi Nakada

Masanori Ando

Hiroji Sumiyoshi

Koji Ichida

Yoshifumi Nakayama

Kazuo Omae

Akira Hamanaka

A method and apparatus for detecting position deviation of an electron gun in which, by increasing the light utilization efficiency to render the field of sight lighter and by reducing the amount of reflected light from the grid surface, the reflected light from the electron beam emitting surface is lighter to enable an edge of an electron beam transmitting hole to be discerned accurately to detect the position deviation of the electron gun accurately. The linear polarized light is illuminated on the electron gun and the light reflected by this electron gun is observed by a light polarization unit to detect the position deviation between grids of the electron gun.

Method and apparatus for detection position deviation of electron gun

An electron gun employed in a color cathode ray tube, or the like, adapted, when electron beams are deflected in a convergence free deflecting magnetic field, to achieve optimal focused conditions for both the electron beam landing at the center and that landing at the corners of a screen by making, within a principal converging region for converging the electron beams, the converging angle in the vertical direction smaller than that in the horizontal direction and by forming, within an object point forming region, the object point in the vertical direction at a further position than where the object point in the horizontal direction is formed.

Electron gun

Cathode ray tube

Growing community of inventors

Fukushima, Japan

Yuzuru Watanabe