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 proceedingConference contribution

2 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 languageEnglish (US)
Title of host publicationProceedings of the International Symposium on Low Power Electronics and Design
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages159-164
Number of pages6
Volume2015-September
ISBN (Print)9781467380096
DOIs
StatePublished - Sep 21 2015
Externally publishedYes
Event20th IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2015 - Rome, Italy
Duration: Jul 22 2015Jul 24 2015

Other

Other20th IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2015
CountryItaly
CityRome
Period7/22/157/24/15

Keywords

  • Low-power design
  • OLED
  • Power delivery network

ASJC Scopus subject areas

  • Engineering(all)

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    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