Fine-grained dynamic voltage scaling on OLED display

Organic Light Emitting Diode (OLED) has emerged as the new generation display technique for mobile multimedia devices. Compared to existing technologies OLEDs are thinner, brighter, lighter, and cheaper. However, OLED panels are still the biggest contributor to the total power consumption of mobile devices. In this work, we proposed a fine-grained dynamic voltage scaling (FDVS) technique to reduce the OLED power. An OLED panel is partitioned into multiple display areas of which the supply voltage is adaptively adjusted based on the displayed content. A DVS-friendly OLED driver design is also proposed to enhance the color accuracy of the OLED pixels at the scaled supply voltage. Our experimental results show that compared to the existing global DVS technique, FDVS technique can achieve 25.9%~43.1% more OLED power saving while maintaining a high image quality measured by Structural Similarity Index (SSIM=0.98). The further analysis shows shat FDVS technology can also effectively reduce the color remapping cost when color compensation is required to improve the image quality of an OLED panel working at a scaled voltage.

[1]  Steve Wright.  Digital Compositing for Film and Video , 2001 .

[2]  Lu Luo,et al.  Energy-Adaptive Display System Designs for Future Mobile Environments , 2003, MobiSys '03.

[3]  Nasser N Peyghambarian,et al.  Application of Screen Printing in the Fabrication of Organic Light‐Emitting Devices , 2000 .

[4]  E. Waffenschmidt,et al.  Drivers for OLEDs , 2007, 2007 IEEE Industry Applications Annual Meeting.

[5]  I. Seguy,et al.  White organic light-emitting diodes (WOLEDs) , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[6]  Amalkumar P. Ghosh,et al.  High-resolution color organic light-emitting diode microdisplay fabrication method , 2000, SPIE Optics East.

[7]  H. Kanai,et al.  Operation characteristics and degradation of organic electroluminescent devices , 1998 .

[8]  Lin Zhong,et al.  Power modeling of graphical user interfaces on OLED displays , 2009, 2009 46th ACM/IEEE Design Automation Conference.

[9]  S. Shaheen,et al.  Highly efficient and bright organic electroluminescent devices with an aluminum cathode , 1997 .

[10]  Lin Zhong,et al.  Power Modeling and Optimization for OLED Displays , 2012, IEEE Transactions on Mobile Computing.

[11]  Massoud Pedram,et al.  DTM: dynamic tone mapping for backlight scaling , 2005, Proceedings. 42nd Design Automation Conference, 2005..

[12]  Eero P. Simoncelli,et al.  Image quality assessment: from error visibility to structural similarity , 2004, IEEE Transactions on Image Processing.

[13]  J. Sturm,et al.  Integrated three-color organic light-emitting devices , 1996 .

[14]  康伸 小林,et al.  White light emitting organic electroluminescent device , 2010 .

[15]  Gernot Heiser,et al.  An Analysis of Power Consumption in a Smartphone , 2010, USENIX Annual Technical Conference.

[16]  Vibhore Vardhan,et al.  Power Consumption Breakdown on a Modern Laptop , 2004, PACS.

[17]  S. Forrest,et al.  Nearly 100% internal phosphorescence efficiency in an organic light emitting device , 2001 .

[18]  中村 伸宏,et al.  照明Organic Light Emitting Diode用ガラス基板 , 2012 .

[19]  Tae-Hyeun Ha,et al.  Backlight Local Dimming Algorithm for High Contrast LCD-TV , 2006 .

[20]  Charles Poynton,et al.  Digital Video and HDTV Algorithms and Interfaces , 2012 .

[21]  Vasily G. Moshnyaga,et al.  LCD display energy reduction by user monitoring , 2005, 2005 International Conference on Computer Design.

[22]  Ching Wan Tang,et al.  Organic electroluminescent multicolor image display device as well as processes for their preparation , 1992 .

[23]  Katsutoshi Nagai,et al.  Multilayer White Light-Emitting Organic Electroluminescent Device , 1995, Science.

[24]  Stephen M. Kelly,et al.  Liquid crystals for twisted nematic display devices , 1999 .

[25]  Massoud Pedram,et al.  HVS-Aware Dynamic Backlight Scaling in TFT-LCDs , 2006, IEEE Transactions on Very Large Scale Integration (VLSI) Systems.

[26]  Naehyuck Chang,et al.  Dynamic voltage scaling of OLED displays , 2011, 2011 48th ACM/EDAC/IEEE Design Automation Conference (DAC).

[27]  A. Heeger,et al.  Flexible light-emitting diodes made from soluble conducting polymers , 1992, Nature.

[28]  Akiyoshi Mikami,et al.  High-Efficiency Color and White Organic Light-Emitting Devices Prepared on Flexible Plastic Substrates , 2005 .

[29]  Young Kwan Kim,et al.  A highly efficient deep blue fluorescent OLED based on diphenylaminofluorenylstyrene-containing emitting materials , 2010 .

[30]  Lin Zhong,et al.  Chameleon: A Color-Adaptive Web Browser for Mobile OLED Displays , 2012, IEEE Transactions on Mobile Computing.

[31]  S. Forrest,et al.  VERY HIGH-EFFICIENCY GREEN ORGANIC LIGHT-EMITTING DEVICES BASED ON ELECTROPHOSPHORESCENCE , 1999 .

[32]  Lin Zhong,et al.  Power-saving color transformation of mobile graphical user interfaces on OLED-based displays , 2009, ISLPED.

[33]  Dieter Neher,et al.  Highly Efficient Single‐Layer Polymer Electrophosphorescent Devices , 2004 .

[34]  F J Duarte.  Coherent electrically excited organic semiconductors: visibility of interferograms and emission linewidth. , 2007, Optics letters.

[35]  Ит Информатика.  PenTile Matrix Family , 2011 .

[36]  S. Forrest,et al.  Color-tunable organic light emitting devices , 1996, Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society.

[37]  Wei-Chung Cheng,et al.  Power minimization in a backlit TFT-LCD display by concurrent brightness and contrast scaling , 2004, IEEE Transactions on Consumer Electronics.

[38]  Carsten Singer,et al.  Dynamic Control Point Simulation of OLEDs , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[39]  Stephen R. Forrest,et al.  Achieving full-color organic light-emitting devices for lightweight, flat-panel displays , 1997 .