Television – Format conversion – Involving both line number and field rate conversion
Patent
1993-11-19
1995-10-24
Groody, James J.
Television
Format conversion
Involving both line number and field rate conversion
348458, 348792, 345100, H04N 566
Patent
active
054614244
ABSTRACT:
A display control apparatus includes an X-driver for sequentially obtaining the horizontal picture signals from a PAL video signal, and supplying the obtained signal to each of the horizontal pixel lines of an NTSC liquid crystal display panel, and a Y-driver for sequentially selecting the horizontal pixel lines, in a preset number every time the X-driver supplies a horizontal picture signal to each of the horizontal pixel lines. In particular, the Y-driver includes logic gate circuit for updating the preset number on the basis of a selection pattern in which at least first and second numbers of horizontal picture lines are determined as selection units of lines to be selected at one time, the selection units are combined at a predetermined ratio, and the combination of the selection units is repeated for each predetermined number of the horizontal picture signals, thereby assigning the horizontal pixel lines to almost all the horizontal picture signals.
REFERENCES:
patent: 5335023 (1994-08-01), Edwards
patent: 5357290 (1994-10-01), Horibe
Burgess Glenton B.
Groody James J.
Kabushiki Kaisha Toshiba
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