A New Large Area Flat CRT

Abstract

A new flat CRT is developed by means of multi-line thermal cathodes. Using this method, a large area full-color fiat CRT (30-50 in. diagonal screen) is possible.
This study focuses on production of a full-color flat CRT with a 34 in. diagonal screen, 30 to 60 mm in thickness and having 700×500 pixels. Because of its simple construction, a low production cost can be realized.
Before developing a large full-color display, a prototype with a small screen which displays a mono chrome image in a demountable vacuum chamber is tested. The size of this displayed image is 20 mm×20 mm, and the image has 110×26 pixels, and a 46 ft-L brightness.