Computer graphics processing and selective visual display system – Display peripheral interface input device
Patent
1992-07-27
1994-01-11
Weldon, Ulysses
Computer graphics processing and selective visual display system
Display peripheral interface input device
345 83, 345148, G09G 128
Patent
active
052785424
ABSTRACT:
A multicolor display system comprised of a matrix of light-emitting diodes (LEDs). Each display dot or pixel is comprised of one red LED and one green LED. The display data is stored in a selected one or more discrete locations of a random access memory as a bit map, depending upon the desired display color. Each memory location is associated with a particular primary color "field" (e.g., red or green). The bit map indicates which of the LEDs is ON and which is OFF in order to display selected data. The data associated with each field is displayed sequentially during a display cycle so that the relative mixture of red fields and green fields determines the resulting display color. The duty cycle of each LED is therefore controlled in software, which reduces the need for complex hardware such as voltage drivers and counters needed in prior art multicolor display systems.
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Bower, Jr. Robert
Smith George C.
Chow Doon Yue
Texas Digital Systems, Inc.
Weldon Ulysses
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