Investigation of a 40-in High-Definition Flat CRT

We are developing a large-size high-definition flat-panel CRT to be applied to HDTV. We investigated the essential technologies :, 1) needle pillar structure to make the glass envelope light; 2) multi-staged deflectors to make the deflection sensitivity high and make the deflection distortion small; 3) beam current feed-back systems to make the emission characteristics uniform; 4) beam landing control systems to synchronize the timing of the beam landing to that of the modulation signal; and 5) scanning methods for reducing the color difference between the sections. Based on this research, we successfuly developed an experimental panel that is approximately one-eighth the size of a 40″ panel. As a result of this development, we are quite certain that developing a large-size HDTV panel will also be possible.