Television – Image signal processing circuitry specific to television – Matrixing or mixing
Patent
1997-11-18
2000-05-30
Harvey, David E.
Television
Image signal processing circuitry specific to television
Matrixing or mixing
348751, H04N 930
Patent
active
060696710
ABSTRACT:
A video signal processing apparatus for use in a two-panel liquid crystal projector includes a preprocessor for receiving primary color video signals and for generating a first luminance signal having only a high frequency component and a first plurality of color signals in which the high frequency component is removed, and a matrix circuit for receiving the first luminance signal and the first plurality of color signals, and for generating a second luminance signal and a second plurality of color signals using a minimum one of the first plurality of color signals as a reference signal, wherein each of the second plurality of color signals is generated by subtracting the reference signal from a respective first color signal. The second luminance signal and the second plurality of color signals generated by the matrix circuit are used for light modulation by a luminance signal liquid crystal panel and a color signal liquid crystal panel, respectively. Thus, an unnatural image phenomenon in an image displayed with regard to the primary color video signals is removed, and resolution and brightness can be improved. Further, disharmonization between the luminance signal component and the color signal component can be prevented in view of the optical and signal processing conditions.
REFERENCES:
patent: 5184212 (1993-02-01), Yamamoto et al.
Ko Han-il
Lee Myeong-hwan
Song Dong-Il
Harvey David E.
Samsung Electronics Co,. Ltd.
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