Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2007-01-12
2011-11-01
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S076000, C345S082000, C345S690000, C345S691000, C345S692000, C345S693000, C315S291000
Reexamination Certificate
active
08049708
ABSTRACT:
The present invention provides a controller for controlling strings of LEDs in a liquid crystal display. The hybrid controller uses both analog and digital circuit components. Error amplifiers are used to compare analog feedback signals received from the LED strings with reference signals. The results of those comparisons are converted to digital data and processed by a digital signal processor (DSP). The DSP calculates the drive voltages for the LED strings based on the deviation between the actual current flows (represented by feedback signals) and the desired current flows (represented by reference signals) through the LED strings. Analog drivers provide the drive voltages to the LED strings.
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Sangam Dilip
Santo Hendrik
Thandi Gurjit
Vi Kien
Atmel Corporation
Elnafia Saifeldin
Fish & Richardson P.C.
Hjerpe Richard
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