TY - GEN
T1 - Design and optimization of a reconfigurable power delivery network for large-area, DVS-enabled OLED displays
AU - Lee, Woojoo
AU - Wang, Yanzhi
AU - Shin, Donghwa
AU - Nazarian, Shahin
AU - Pedram, Massoud
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/9/21
Y1 - 2015/9/21
N2 - Dynamic voltage scaling (DVS) has proven effective in minimizing the power consumption of OLED displays, resulting only in minimal image distortion. This technique has been extended to perform zone-specific DVS by dividing the panel area into zones and applying independent DVS to each zone based on the displayed content. The application of the latter technique to large-area OLED displays has not been done in part due to a high overhead of its dedicated DC-DC converter for each zone and low conversion efficiency when the load current of each converter lies outside the desirable range. To address this issue, this work proposes a reconfigurable power delivery network architecture, comprised of a small number of DC-DC converters, a switch network and an online controller, to realize fine-grained (zone-specific) DVS in large-area OLED display panels. The proposed framework consistently achieves high power conversion efficiency and significant energy saving while preserving the image quality. Experimental results demonstrate that up to 36% power savings can be achieved in a 65″ 4K Ultra high-definition OLED display by using the proposed framework.
AB - Dynamic voltage scaling (DVS) has proven effective in minimizing the power consumption of OLED displays, resulting only in minimal image distortion. This technique has been extended to perform zone-specific DVS by dividing the panel area into zones and applying independent DVS to each zone based on the displayed content. The application of the latter technique to large-area OLED displays has not been done in part due to a high overhead of its dedicated DC-DC converter for each zone and low conversion efficiency when the load current of each converter lies outside the desirable range. To address this issue, this work proposes a reconfigurable power delivery network architecture, comprised of a small number of DC-DC converters, a switch network and an online controller, to realize fine-grained (zone-specific) DVS in large-area OLED display panels. The proposed framework consistently achieves high power conversion efficiency and significant energy saving while preserving the image quality. Experimental results demonstrate that up to 36% power savings can be achieved in a 65″ 4K Ultra high-definition OLED display by using the proposed framework.
KW - Low-power design
KW - OLED
KW - Power delivery network
UR - http://www.scopus.com/inward/record.url?scp=84958530252&partnerID=8YFLogxK
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U2 - 10.1109/ISLPED.2015.7273507
DO - 10.1109/ISLPED.2015.7273507
M3 - Conference contribution
AN - SCOPUS:84958530252
T3 - Proceedings of the International Symposium on Low Power Electronics and Design
SP - 159
EP - 164
BT - Proceedings of the International Symposium on Low Power Electronics and Design, ISLPED 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 20th IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2015
Y2 - 22 July 2015 through 24 July 2015
ER -