Magnetic field distribution of shadow mask and its influence on electron trajectory.

Abstract

It is well known that, in a color CRT, color change occurs due to the magnetization of a shadow mask and frame under the environmental magnetic field. In order to clarify the influence of the magnetization of a shadow mask and frame quantitatively, we measured the magnetic field distribution around the mask and frame, and calculated the electron beam trajectory change with a slit model to simulate a shadow mask. The results show that the remarkable change of the trajectory and velocity of electron beam occur in the slit region with the high magnetic flux density.