Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-04-30
2000-10-03
Luu, Matthew
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345208, G09G 336
Patent
active
061279943
ABSTRACT:
The method of the present invention produces a plurality of bi-level waveforms on the ROW/common lines and COLUMN/segment lines of a passive multiplexed liquid crystal display (LCD). These waveforms drive the LCD display using binary data from display memory locations. At periodic intervals a counter is incremented while the counter value is then used to 1) look-up in a table the bi-level data to output on the ROW/commons; 2) look-up memory locations associated with the active COLUMN/segments; and 3) to provide inverted COLUMN/segments data before sending the bi-level data to the COLUMN/segment lines of the LCD. The counter increments from zero to four times the number of ROW/commons before being reset to zero and the waveforms repeated. Thus, an algorithm produces one ON/select voltage and one OFF
on-select voltage that are provided to the LCD.
REFERENCES:
patent: 4901066 (1990-02-01), Kobayashi et al.
patent: 5774103 (1998-06-01), Choi et al.
patent: 5818411 (1998-10-01), Sakamoto et al.
Dunn Patrick M.
Ellis, II David L.
Rivera Ruben
Luu Matthew
Motorola Inc.
Scutch, III Frank M.
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