Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-07-11
2006-07-11
Liang, Regina (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S690000, C345S692000, C348S770000
Reexamination Certificate
active
07075506
ABSTRACT:
A method and system for performing spatial temporal multiplexing using a multi-threshold mask. A mask generator (404) outputs a threshold value for each pixel of a display. The mask generator typically creates a blue noise mask for a given pixel array that is replicated over the face of the entire display. The blue noise mask generator (404) typically is implemented as a memory lookup table. An index generator (402) provides an offset into the memory lookup table that allows the table to be shifted from time to time. The output of the blue noise mask generator (404), which may be the threshold value itself or a signal representing which threshold is being used, is an input to a selective inverter (406). The selective inverter (406) provides the option of inverting the blue noise mask. To reduce artifacts, the mask is periodically shifted and/or inverted. The value from the mask generator (404), whether inverted or not, is compared to the LSBs of the input data word to yield the fractional bit values. The data adjust block (410) receives the LSBs of the input data word and apportions the intensity between the various fractional bits and perhaps one or more binary bit. Allocating the data between the fractional and binary bits allows the gradual feathering in of each more significant bit as the image intensity word increases.
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Kempf Jeffrey
Morgan Daniel J.
Brady III Wade James
Brill Charles A.
Liang Regina
Nguyen Jennifer T.
Telecky , Jr. Frederick J.
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