Design and optimization of a reconfigurable power delivery network for large-area, DVS-enabled OLED displays

Woojoo Lee; Yanzhi Wang; Donghwa Shin; Shahin Nazarian; Massoud Pedram

doi:10.1109/ISLPED.2015.7273507

Design and optimization of a reconfigurable power delivery network for large-area, DVS-enabled OLED displays

Woojoo Lee, Yanzhi Wang, Donghwa Shin, Shahin Nazarian, Massoud Pedram

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

3 Scopus citations

Abstract

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.

Original language	English (US)
Title of host publication	Proceedings of the International Symposium on Low Power Electronics and Design
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	159-164
Number of pages	6
Volume	2015-September
ISBN (Print)	9781467380096
DOIs	https://doi.org/10.1109/ISLPED.2015.7273507
State	Published - Sep 21 2015
Externally published	Yes
Event	20th IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2015 - Rome, Italy Duration: Jul 22 2015 → Jul 24 2015

Other

Other	20th IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2015
Country/Territory	Italy
City	Rome
Period	7/22/15 → 7/24/15

Keywords

Low-power design
OLED
Power delivery network

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1109/ISLPED.2015.7273507

Cite this

Lee, W., Wang, Y., Shin, D., Nazarian, S., & Pedram, M. (2015). Design and optimization of a reconfigurable power delivery network for large-area, DVS-enabled OLED displays. In Proceedings of the International Symposium on Low Power Electronics and Design (Vol. 2015-September, pp. 159-164). [7273507] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISLPED.2015.7273507

Design and optimization of a reconfigurable power delivery network for large-area, DVS-enabled OLED displays. / Lee, Woojoo; Wang, Yanzhi; Shin, Donghwa et al.

Proceedings of the International Symposium on Low Power Electronics and Design. Vol. 2015-September Institute of Electrical and Electronics Engineers Inc., 2015. p. 159-164 7273507.

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

Lee, W, Wang, Y, Shin, D, Nazarian, S & Pedram, M 2015, Design and optimization of a reconfigurable power delivery network for large-area, DVS-enabled OLED displays. in Proceedings of the International Symposium on Low Power Electronics and Design. vol. 2015-September, 7273507, Institute of Electrical and Electronics Engineers Inc., pp. 159-164, 20th IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2015, Rome, Italy, 7/22/15. https://doi.org/10.1109/ISLPED.2015.7273507

Lee W, Wang Y, Shin D, Nazarian S, Pedram M. Design and optimization of a reconfigurable power delivery network for large-area, DVS-enabled OLED displays. In Proceedings of the International Symposium on Low Power Electronics and Design. Vol. 2015-September. Institute of Electrical and Electronics Engineers Inc. 2015. p. 159-164. 7273507 doi: 10.1109/ISLPED.2015.7273507

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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.

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Design and optimization of a reconfigurable power delivery network for large-area, DVS-enabled OLED displays

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