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AssigneeU.S. Philips Corporation
InventorsAlbertus A. S. Sluijterman, Werner A. L. Heijnemans, Nicolaas G. Vink, Joris A. M. Nieuwendijk
Estimating the term…
The stringent requirements regarding convergence (in color display tubes) and spot quality in monochrome display tubes are met by deflection units which produce dynamic multi-pole fields which are strongly modulated. Static multipole fields, which have a dynamic component when an electron beam passes therethrough, are used in cathode ray tube-deflection unit combinations to simulate, a strong modulation of the dynamic multipole deflection fields. In one combination, the production of a negative static eightpole field in the center of the deflection area improves spot quality.
A cathode ray display tube assembly comprising an envelope, an electron gun system mounted in said envelope for producing at least one electron beam, and a deflection unit mounted on the envelope defining a deflection area within the envelope;
A deflection unit for a cathode ray display tube of the type comprising an envelope and an electron gun system mounted in said envelope for producing at least one electron beam, the deflection unit being adapted for mounting on the envelope to define a deflection area within the envelope;
Dependencies are inferred from the claim text.