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 | |
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)