Television – Image signal processing circuitry specific to television – Special effects
Patent
1997-07-14
1999-09-28
Faile, Andrew I.
Television
Image signal processing circuitry specific to television
Special effects
345 99, H04N 974
Patent
active
059596910
ABSTRACT:
A digital display apparatus capable of adjusting the vertical size of the display image includes a PLL circuit and a frequency divider. The output voltage level of an active low-pass filter in the PLL circuit is changed if the power voltage supplied to the filter is varied, resulting in the frequency variation of the dot clock signal even though there is no variation in the frequency of the horizontal synchronizing signal. Thus, the adjustment of the vertical size of the display image is easily achieved by controlling a voltage supplied to the low-pass filter in the PLL circuit.
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Berhe Alexander
Bushnell Esq. Robert E.
Faile Andrew I.
Samsung Electronics Co,. Ltd.
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