Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-05-28
1998-10-06
Wu, Xiao
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345148, 345 63, 345213, G09G 510
Patent
active
058184198
ABSTRACT:
A display device, for displaying a multiple-level gray scale picture through a frame having a plurality of sub-frames which are time-divided in accordance with weight value of gray scale for each sub-frame, comprises sub-frame selection circuit, being supplied with an vertical synchronization signal, for selecting the number of the sub-frames which can be displayed within the period for the single frame in accordance with the frequency of the vertical synchronization signal, and for providing a sub-frame selection signal corresponding to the number of the sub-frames; and display control circuit, operatively connected to the sub-frame selection circuit, for receiving the sub-frame selection signal and an input display data signal and for controlling said display of the multi-level gray scale picture in accordance with the selected number of the sub-frames. When the frequency of Vsync. is varied, the optimal number of the subframes are selected so that a number of sustain pulse, conversion table for pseudo-multiple-level gray scale conversion and for duplicated subframe conversion are properly selected.
REFERENCES:
patent: 5400044 (1995-03-01), Thomas
Ishida Katsuhiro
Kuriyama Hirohito
Tajima Masaya
Ueda Toshio
Yamamoto Akira
Fujitsu Limited
Wu Xiao
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