Paper Info
Title
Dynamic Driver Supply Voltage Scaling for Organic Light Emitting Diode Displays
Abstract
Organic light emitting diode (OLED) display is a self-illuminating device that is supposed to be more power efficient than liquid crystal display (LCD). However, OLED display panels consume as much power as LCD panels due to total internal reflection. As the power consumption of the OLED panel depends on the pixel colors, most of the earlier power saving methods alter the pixel colors. In practice, such OLED power saving techniques can hardly accommodate photo viewers and movie players. This paper introduces the first OLED power saving technique that dynamically changes the supply voltage of the panel. Reduced supply voltage results in both power saving and decreased pixel luminance, but model-based color correction restores the decreased luminance with minimum color distortion. This technique is similar to dynamic backlight scaling of LCDs but is based on the unique characteristics of the OLED drivers. We provide an online color compensation algorithm using the luminance histogram. Luminance quantization in the histogram also achieves resource minimization. We develop a prototype and demonstrate the proposed OLED dynamic voltage scaling (DVS). Experimental result shows that the proposed OLED DVS saves up to 74.7% of the display power for the still images and up to 35.9% for movie clips.
Year
DOI
Venue
2013
10.1109/TCAD.2013.2248193
IEEE Trans. on CAD of Integrated Circuits and Systems
Keywords
DocType
Volume
Organic light emitting diodes,Image color analysis,Pulse width modulation,Voltage control,Driver circuits,Power demand,Transistors
Journal
32
Issue
ISSN
Citations 
7
0278-0070
10
PageRank 
References 
Authors
0.57
15
4
Name
Order
Citations
PageRank
Donghwa Shin139632.34
Younghyun Kim254051.72
Naehyuck Chang31985185.85
Massoud Pedram478011211.32