H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/35.1201
H01J 29/70 (2006.01) H01J 29/76 (2006.01)
Patent
CA 1260053
10 ABSTRACT: In-line colour display tube carrying a deflection unit which presents left-right sided raster correction. An in-line colour display tube (42) carrying a deflection unit (45) having a magnatisable core (47). A raster correction device is provided having four pole shoes (509 51, 52, 53) positioned at the corners of a rectangle which are present near the core end facing the display screen near each end of the pair of field deflec- tion coils (46a, 46b). The four pole shoes are connected in pairs by means of respective bridging collector ele- ments (48, 49) of a soft magnetic material. The bridging collector elements (48, 49) are placed in confronting relationship with the magnetisable core (47) and magnetic flux is diverted from the core (47) which without the ele- ments would not contribute to the field deflection field or would even not emerge from the core (47). The flux diver- ted from the core (47) is conveyed via the pole shoes (50,51,52,53) in such a manner that the screen sided portion of the field deflection field becomes pincushion- shaped. Figures 3, 5.
525619
Fetherstonhaugh & Co.
N.v.philips'gloeilampenfabrieken
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