Method and apparatus for displaying images having adjacent horiz

Details Method and apparatus for displaying images having adjacent horiz Method and apparatus for displaying images having adjacent horiz

1997-12-31

2000-07-18

Faile, Andrew I.

Television

Cathode-ray tube display excessive voltage control

348678, H04N 568

Patent

active

060914548

ABSTRACT:
A television system for displaying images having adjacent horizontal blocks with sharp contrast. In general, such sharp contrasts can cause the drive voltage (Hv) applied to an anode of a CRT display unit to change. The changes typically result in distortions in the displayed images. A correction logic is employed to regulate the voltage source that supplies the voltage to the anode of the CRT display unit. The correction logic examines the digital data representation of the images to determine the extent of contrast, and supplies a corresponding correction voltage to regulate the voltage source. Due to the correction voltage, a constant drive voltage is supplied to the anode. The distortions are thus minimized or eliminated.

REFERENCES:
patent: 4979044 (1990-12-01), Hong
patent: 5367231 (1994-11-01), Kobayashi et al.
patent: 5424780 (1995-06-01), Cooper

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