H - Electricity – 01 – J
Patent
H - Electricity
01
J
355/19
H01J 29/56 (2006.01)
Patent
CA 1284690
ABSTRACT: Display control apparatus. Horizontal and vertical deflection windings in a deflection yoke coil assembly of a CRT (cathode ray tube) having stroke written or raster scan displays are driven by x and y analog deflection signals, respectively. Each of the x and y analog deflection signals are converted to x and y digital signals, respectively, sampled to provide x, y sample sets which are coupled to a digital x correction signal memory and a digital y correction signal memory, respectively. Geometric corrections are stored in the memories for each of a predetermined number of x, y signal set values which correspond, respectively, to a number of point locations over the CRT screen. The x and y corrections that are addressed from the memories are supplied to MDACs (multiplying digital to analog converters) and then to analog delay line filters which supply the x, y analog correction signals for summing with the x, y analog deflection signals, respectively. The x and y digital signals are also coupled to separate astigmatism, dynamic focus, shading and convergence memories which are coupled to DACs (digital to analog converters) and then to respective CRT controls or associated circuitry.
557602
Close Ernest F.
Fetherstonhaugh & Co.
Magnavox Government And Industrial Electronics Company
LandOfFree
Display control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Display control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display control apparatus will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1190805