Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1994-08-12
1997-09-16
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345200, G09G 500
Patent
active
056685777
ABSTRACT:
A circuit is provided for generating fast dynamic video displays on a screen containing an arbitrary number of areas of any shape and size is. The screen areas are independently modulated in time in accordance with binary m-sequences and other Hadamard sets. The circuit comprises a number of 1-bit video planes (34) and a circuit for selecting specific video planes and a circuit (38) generating the modulo two sum of the content of a selected number of these planes. The selected video planes are identified by the ONEs in a binary word transferred to a register (36) of the circuit by a processor (14). Programming code is provided for the generation of sequences of such words that effect temporal modulation of screen areas in accordance with binary m-sequences or other Hadamard sets. Programming code is also provided for loading the screen areas that effect a predetermined advance in the m-sequence modulation from one area to the next and permitting different choices of the states of modulation in each screen area.
REFERENCES:
patent: 3701988 (1972-10-01), Allaart
patent: 3836902 (1974-09-01), Okuda et al.
patent: 5359342 (1994-10-01), Nakai et al.
Hjerpe Richard
Liang Regina
Pressman David
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