A Segmented Lens for Improving Color Television Dot Patterns

Eiichi Yamazaki, Koichi Maruyama, Toshio Ueda, Iwao Ogura

A new segmented lens has been designed and fabricated that is intended to replace a conventional, continuous-surface lens used in making color TV picture tubes. The lens is employed in the lighthouse during the phosphor dot screening process. Using the segmented lens, it has been possible to reduce beam landing errors by more than 50% in the new 110° deflection angle picture tubes. With this lens, the wide-angle tubes should be no more difficult to produce than ordinary 90° tubes, and when it is used in the manufacture of 90° tubes, pictures of unprecedented high quality are made possible.

Print ISSN
Published
1973-03
Content type
Original Research
DOI
10.5594/J07677