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专利名称：Cathode-ray tube for displaying coloured
pictures
发明人：Verweel, Jan申请号：EP80200384.8申请日：19800428公开号：EP0018688B1公开日：19810916
摘要：A cathode ray tube for displaying coloured pictures of the post-focusing type.The colour selection means (7) are formed by a plate (20) which is provided with a largenumber of apertures (9), which plate (20) is provided on one side with a first grid ofparallel strips (21) of hard magnetic material provided between the rows of apertures (9).The colour selection means (7) are magnetized in a direction perpendicular to the planeof the plate (20) so that a magnetic quadrupole is . obtained in each aperture (9).
申请人：Philips Electronics N.V.
地址：Groenewoudseweg 1 5621 BA Eindhoven NL
国籍：NL
代理机构：Zwaan, Andries Willem
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