Luminance compensation for AMOLED displays using integrated MIS sensors

Yuri Vygranenko; Miguel Fernandes; Paula Louro; Manuela Vieira

doi:10.1117/12.2265937

Luminance compensation for AMOLED displays using integrated MIS sensors

Yuri Vygranenko, Miguel Fernandes, Paula Louro, Manuela Vieira

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English
Title of host publication	Optical Sensors 2017
Publisher	Spie -- the Int Soc for Optical Engineering
Volume	10231
ISBN (Electronic)	978-151060963-1
DOIs	https://doi.org/10.1117/12.2265937
Publication status	Published - 1 Jan 2017
Event	Optical Sensors 2017 - Prague, Czech Republic Duration: 24 Apr 2017 → 27 Apr 2017

Conference

Conference	Optical Sensors 2017
Country	Czech Republic
City	Prague
Period	24/04/17 → 27/04/17

Keywords

Amorphous silicon
Displays
Optical feedback
Pixel circuits

Access to Document

10.1117/12.2265937

Link to publication in Scopus

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Vygranenko, Y., Fernandes, M., Louro, P., & Vieira, M. (2017). Luminance compensation for AMOLED displays using integrated MIS sensors. In Optical Sensors 2017 (Vol. 10231). [UNSP 1023128] Spie -- the Int Soc for Optical Engineering. https://doi.org/10.1117/12.2265937

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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.",

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AB - 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.

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