Display device using scan velocity modulation

Details Display device using scan velocity modulation Display device using scan velocity modulation

1993-11-16

1995-05-30

Groody, James J.

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348806, 348252, 315371, H04N 322, H04N 559

Patent

active

054206456

ABSTRACT:
To improve pictures to be displayed on a display screen of a display device, it is known to use scan velocity modulation. In scan velocity modulation the (horizontal) deflection rate of the electron beam(s) is modulated with the luminance component of the video signal. As a result of scan velocity modulation, the information of the video signal will no longer be displayed at the correct position on the display screen. By using the modulation signal applied to the scan velocity modulator also for modulating the (read) clock rate of the video signal from the memory, it can be ensured that the video signal and the (modulated) deflection signal are always in synchronism with each other.

REFERENCES:
patent: 4170785 (1979-10-01), Yoshida et al.
patent: 4183064 (1980-01-01), Sahara et al.
patent: 4261014 (1981-04-01), Sahara et al.
patent: 4322742 (1982-03-01), Yoshida et al.
patent: 4665432 (1987-05-01), Shima
patent: 5179320 (1993-01-01), Tripod

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