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 |
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Title of host publication | Optical Sensors 2017 |
Publisher | Spie -- the Int Soc for Optical Engineering |
Volume | 10231 |
ISBN (Electronic) | 978-151060963-1 |
DOIs | |
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 |
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Country/Territory | Czech Republic |
City | Prague |
Period | 24/04/17 → 27/04/17 |
Keywords
- Amorphous silicon
- Displays
- Optical feedback
- Pixel circuits