Picture display system including a deflection unit with a double

Details Picture display system including a deflection unit with a double Picture display system including a deflection unit with a double

1988-05-19

1989-10-17

Wieder, Kenneth

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

335211, 335212, H01J 2976, H01F 312

Patent

active

048749834

ABSTRACT:
Self-convergent picture display system with a color display tube and an electromagnetic deflection unit including a field deflection coil and a line deflection coil which are both of the saddle type and are wound directly on a support. The deflection unit includes a pair of magnetically permeable portions which are arranged symmetrically with respect to the plane of symmetry of the field deflection coil on either side of the tube axis. The magnetically permeable portion draws magnetic flux from the end of the yoke ring in order to extend the vertical deflection field. A self-convergent system can be realized with different screen formats by choosing different lengths of the magnetically permeable portions.

REFERENCES:
patent: 4357556 (1982-11-01), Burke

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