process for the manufacture of a cathode-ray tube to reproduce images colorees and the cathode ray tube factory

摘要

1533009 Colour television tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 27 Aug 1976 [1 Sept 1975] 35726/76 Heading H1D In a lighthouse method of producing a colour stripe phosphor screen for a colour television tube in which, for each colour-blue, in Fig. 2-a photosensitive layer is exposed from at least two positions disposed one on each side of the exposure centre of that colour, such that the light beams passing through the adjacent slots overlap while the beams passing through any given slot are spaced apart on the layer to give unexposed regions 13 on which the phosphor is deposited, colour error at the extreme edge stripes-the right-hand edge stripe 8 in Fig. 2- due to lack of exposure of the relevant areais prevented by exposing the surface additionally, Fig. 4, from the direction of the exposure centre of the appropriate one of the other colours-red, in Fig. 4. Correspondingly, to prevent colour error at the extreme left-hand edge stripes in Fig. 2, the photoconductive layer is exposed, when forming the red stripes, additionally from the direction of the exposure centre of the blue stripes (Fig. 5, not shown).