Method of manufacturing a cathode ray tube for displaying...

Details Method of manufacturing a cathode ray tube for displaying... Method of manufacturing a cathode ray tube for displaying...

H - Electricity

01

J

316/13

H01J 9/22 (2006.01) H01J 9/227 (2006.01)

Patent

CA 1047097

ABSTRACT: The invention relates to a method of manu- facturing a cathode-ray tube for displaying coloured pictures. Said method comprises an exposure step in which the exposure is carried out by means of an elongate light source via a shadow mask having elongate apertures the longitudinal axes of which extend parallel to the longi- tudinal axis of the light source. By moving the light source uniformly during the exposure over a distance substantially equal to an integer number of times the length of the light source in the direction of the longitudinal axis, a line structure is obtained on the display screen in which the width of the lines is very homogeneous. -11-

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