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New projection tubes using spherical phosphors and an electron gun having an impregnated cathode
Author(s) -
Hattori H.
Publication year - 2001
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1828801
Subject(s) - phosphor , electron gun , projection (relational algebra) , brightness , cathode ray tube , cathode , optics , materials science , high definition television , electron , computer science , computer graphics (images) , optoelectronics , cathode ray , physics , electrical engineering , telecommunications , engineering , algorithm , quantum mechanics
Abstract— Today, demand for flat and large displays are increasing dramatically. One of the solutions is a projection CRT system, which has significant advantages of low cost and high picture quality.1 We have newly developed projection tubes that combine spherical phosphors and a new electron gun that uses an impregnated cathode, resulting in a 40% improvement in resolution as well as a 5% increase in brightness compared with conventional tubes. The new projection tubes are suitable for high‐resolution displays for DTV and HDTV applications.