Scanning conversion display apparatus

Details Scanning conversion display apparatus Scanning conversion display apparatus

1992-09-02

1994-04-05

Kostak, Victor R.

Television

Video display

Liquid crystal

348791, 348469, H04N 574, H04N 701

Patent

active

053010310

ABSTRACT:
A display apparatus using a matrix display panel, such as a liquid crystal panel, for converting the number of scanning lines to be displayed to a number that can be accommodated on a panel having a smaller number of scanning lines. The apparatus includes a control circuit which produces control signals in synchronism with the input video signal, horizontal and vertical scanning circuits each including a shift register operated by the control circuit, and a display panel which is formed of a matrix arrangement of pixels that are driven selectively by the scanning circuits. The apparatus further includes a circuit which halts the operation of the vertical shift register at a certain interval within the effective scanning period of the vertical scanning circuit so as to extract vertical shift clocks, thereby removing the vertical shift clocks within the effective display period of the video signal, thereby extracting periodically extracting scanning lines.

REFERENCES:
patent: 4694348 (1987-09-01), Kamiya et al.
patent: 4789899 (1988-12-01), Takahashi et al.
patent: 4942458 (1990-07-01), Miyajima et al.
patent: 5003388 (1991-03-01), Schirochi et al.

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