Luminance compensation for AMOLED displays using integrated MIS sensors

Yuri Vygranenko; Miguel Fernandes; Paula Louro; Manuela Vieira

doi:10.1117/12.2265937

16 May 2017 Luminance compensation for AMOLED displays using integrated MIS sensors

Yuri Vygranenko, Miguel Fernandes, Paula Louro, Manuela Vieira

Proceedings Volume 10231, Optical Sensors 2017; 1023128 (2017) https://doi.org/10.1117/12.2265937
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

Active-matrix organic light-emitting diodes (AMOLEDs) are ideal for future TV applications due to their ability to faithfully reproduce real images. However, pixel luminance can be affected by instability of driver TFTs and aging effect in OLEDs. This paper reports on a pixel driver utilizing a metal-insulator-semiconductor (MIS) sensor for luminance control of the OLED element. In the proposed pixel architecture for bottom-emission AMOLEDs, the embedded MIS sensor shares the same layer stack with back-channel etched a Si:H TFTs to maintain the fabrication simplicity. The pixel design for a large-area HD display is presented. The external electronics performs image processing to modify incoming video using correction parameters for each pixel in the backplane, and also sensor data processing to update the correction parameters. The luminance adjusting algorithm is based on realistic models for pixel circuit elements to predict the relation between the programming voltage and OLED luminance. SPICE modeling of the sensing part of the backplane is performed to demonstrate its feasibility. Details on the pixel circuit functionality including the sensing and programming operations are also discussed.

Citation Download Citation

Yuri Vygranenko, Miguel Fernandes, Paula Louro, and Manuela Vieira "Luminance compensation for AMOLED displays using integrated MIS sensors", Proc. SPIE 10231, Optical Sensors 2017, 1023128 (16 May 2017); https://doi.org/10.1117/12.2265937

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KEYWORDS

Computer programming

Capacitors

Transistors

Circuit switching

Photomasks

External quantum efficiency

Video

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