Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2011-06-07
2011-06-07
Dharia, Prabodh M (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S083000
Reexamination Certificate
active
07956831
ABSTRACT:
Apparatus, systems, and methods are provided for dimming pixels on an active matrix light-emitting diode display. One apparatus includes an LED couplable between a voltage source and ground. First and second pulse-width modulation (PWM) drivers are also coupled to the LED. A system includes a plurality of LEDs forming a plurality of rows coupled between a voltage source and ground. A plurality of PWM drivers, each coupled to each of the LEDs in one of the plurality of rows, and a global PWM driver coupled to each of the plurality of LEDs in each of the plurality of rows are also included. One method includes providing current to each LED of a row of LEDs for a first portion of a cycle via a PWM driver, and providing current to each LED in the row for a second portion of the cycle via a different PWM driver.
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EP Search Report, EP 08156846.8 dated Mar. 15, 2010.
Roush Jerry A.
Sarma Kalluri R.
Schmidt John F. L.
Dharia Prabodh M
Honeywell Interntional Inc.
Ingrassia Fisher & Lorenz P.C.
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