Amoled display backplanes - pixel driver circuits, array...

Details Amoled display backplanes - pixel driver circuits, array... Amoled display backplanes - pixel driver circuits, array...

G - Physics

09

G

G09G 3/32 (2006.01) G09F 9/33 (2006.01)

Patent

CA 2443206

Pixel circuits, array architecture, and external compensation scheme for AMOLED displays are provided. The pixel circuits are current programmed, drive an organic light emitting diode (OLED) with the desired current, and compensate for increase in the threshold voltage of the drive TFT. The new array architecture presented allows the use of current sinks to drive current programmed pixels. The external compensation scheme uses feedback with circuitry that is external to the display array, to monitor changes in the OLED current and adjust the input of the pixel circuit accordingly.

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