Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1996-09-12
1997-07-29
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2956
Patent
active
056524820
ABSTRACT:
A symmetrical square wave, having zero average value, is coupled to the input of a horizontal deflection yoke through an S-shaping capacitance. A negative resistance coupled to the output of the yoke has a negative resistance value which compensates for resistive losses in the yoke. A yoke current generated in the yoke will be a symmetrical triangular waveform. A first control loop adjusts the negative resistance value to assure successive zero value crossings of the yoke current are coincident in time with each center of successive horizontal scan lines. A second control loop adjusts the square wave to assure successive level transitions of the square wave are coincident in time with successive changes of scanning direction.
REFERENCES:
patent: 4956585 (1990-09-01), Rilly
patent: 5428271 (1995-06-01), Watanabe et al.
Gangolf Hirtz et al., Symmetrical Deflection For Future IDTV/HDTV Receivers, Jun. 1993, Paper of the IEEE, pp. 225-233, Chicago.
Uwe E. Kraus, Symmetrical Line Deflection For Color TV Receivers With Enhanced Picture Quality, Aug. 1985, IEEE Transactions on CE, vol. CE-31, No. 3, pp. 255-261.
Uwe E. Kraus et al., 100Hz Test-Receiver With Sinusoidal Line-Deflection, Paper of the IEEE (International Conference on CE), Jun. 6-9, 1989, pp. 262-263, Chicago.
Blum Theodore M.
Laks Joseph J.
Lenihan Thomas F.
RCA Thomson Licensing Corporation
Tripoli Joseph S.
LandOfFree
Bidirectional deflection and display systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bidirectional deflection and display systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bidirectional deflection and display systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-635829