Data display apparatus with function for correcting effect of ex

Details Data display apparatus with function for correcting effect of ex Data display apparatus with function for correcting effect of ex

1991-10-17

1993-06-29

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 8, 315370, 358139, G09G 104, H01J 2906, H01J 2956, H04N 1700

Patent

active

052237680

ABSTRACT:
A data display apparatus with a function for correcting the effect of external magnetic field including a display, a driving circuit for driving the display, an adjuster for adjusting a display position of input signal, a detector for detecting an output voltage of the driving circuit, and a difference detection circuit. The difference detection circuit detects a difference between an output of the detector when a predetermined reference signal is inputted as the input signal and an output of the detector when a display position of the predetermined reference signal is adjusted to a reference position on the screen of the display by the adjuster. The difference is stored in a memory as calibration data for correcting the effect of external magnetic field or the like.

REFERENCES:
patent: 4812713 (1989-03-01), Blanchard
patent: 5021720 (1991-06-01), Aimura
patent: 5099179 (1992-03-01), Fox et al.

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