Automatic on-screen color converting circuit for a color televis

Details Automatic on-screen color converting circuit for a color televis Automatic on-screen color converting circuit for a color televis

1991-10-16

1994-02-15

Groody, James J.

Television

Image signal processing circuitry specific to television

Special effects

345150, 348594, 348638, 348635, 348571, H04N 974

Patent

active

052871720

ABSTRACT:
An automatic on-screen color signal converting circuit is disclosed, which includes a color signal level detecting part (30), an inverting part (40), and combining/switching part (70), wherein the color signal level detecting part (30) detects the level of the video color signal from the input color difference signal and luminance signal and the inverting part (40) inverts the output signal of the color signal level detecting part (30) to combine them with an on-screen signal blanking signal outputted from an OSD generating part (60). Therefore, the cathode ray tube driving circuit (20) is provided with an OSD color signal which is complementary to that of the video signal and the on-screen signal can be always clearly distinguished from the video signal during their simultaneous display and also automatically converted according to changing of the video signals.

REFERENCES:
patent: 5126832 (1992-06-01), Lee

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