Idle period frequency scaling to reduce dynamic power of display driver IC

Woojoo Kim; Eui Young Chung

doi:10.1109/ITC-CSCC55581.2022.9894896

Idle period frequency scaling to reduce dynamic power of display driver IC

Woojoo Kim, Eui Young Chung

Department of Electrical and Electronic Engineering

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

Abstract

The proportion of power consumption occupied by the display panel in the mobile device is increasing due to the driving the high frame rate and the increase in resolution. Among them, the power of the display driver IC (DDI), a core component that drives the display panel, was also increased. Recently, Variable Refresh Rate (VRR) technology has been widely used to reduce display panel power consumption, and to this end, DDI is also equipped with technology for VRR driving. During VRR operation, DDI can operate at a low frame rate, which is possible by extending the DDI idle period. During the idle period extension, dynamic power is still flowing because the clock is still toggling in the idle period. This paper introduces a frequency scaling technique through internal clock dividing in the idle period during the VRR operation. As a result of the frequency scaling we propose, at a sampling frame rate less than 60Hz, the power-saving effect of 8.82% on average and 11.11% on maximum can be confirmed through power simulation.

Original language	English
Title of host publication	ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	464-467
Number of pages	4
ISBN (Electronic)	9781665485593
DOIs	https://doi.org/10.1109/ITC-CSCC55581.2022.9894896
Publication status	Published - 2022
Event	37th International Technical Conference on Circuits/Systems, Computers and Communications, ITC-CSCC 2022 - Phuket, Thailand Duration: 2022 Jul 5 → 2022 Jul 8

Publication series

Name	ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications

Conference

Conference	37th International Technical Conference on Circuits/Systems, Computers and Communications, ITC-CSCC 2022
Country/Territory	Thailand
City	Phuket
Period	22/7/5 → 22/7/8

Bibliographical note

Publisher Copyright:
© 2022 IEEE.

All Science Journal Classification (ASJC) codes

Information Systems
Electrical and Electronic Engineering
Artificial Intelligence
Computer Networks and Communications
Computer Science Applications
Hardware and Architecture

Access to Document

10.1109/ITC-CSCC55581.2022.9894896

Cite this

Kim, W., & Chung, E. Y. (2022). Idle period frequency scaling to reduce dynamic power of display driver IC. In ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications (pp. 464-467). (ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ITC-CSCC55581.2022.9894896

Kim, Woojoo ; Chung, Eui Young. / Idle period frequency scaling to reduce dynamic power of display driver IC. ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications. Institute of Electrical and Electronics Engineers Inc., 2022. pp. 464-467 (ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications).

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abstract = "The proportion of power consumption occupied by the display panel in the mobile device is increasing due to the driving the high frame rate and the increase in resolution. Among them, the power of the display driver IC (DDI), a core component that drives the display panel, was also increased. Recently, Variable Refresh Rate (VRR) technology has been widely used to reduce display panel power consumption, and to this end, DDI is also equipped with technology for VRR driving. During VRR operation, DDI can operate at a low frame rate, which is possible by extending the DDI idle period. During the idle period extension, dynamic power is still flowing because the clock is still toggling in the idle period. This paper introduces a frequency scaling technique through internal clock dividing in the idle period during the VRR operation. As a result of the frequency scaling we propose, at a sampling frame rate less than 60Hz, the power-saving effect of 8.82% on average and 11.11% on maximum can be confirmed through power simulation.",

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Kim, W & Chung, EY 2022, Idle period frequency scaling to reduce dynamic power of display driver IC. in ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications. ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications, Institute of Electrical and Electronics Engineers Inc., pp. 464-467, 37th International Technical Conference on Circuits/Systems, Computers and Communications, ITC-CSCC 2022, Phuket, Thailand, 22/7/5. https://doi.org/10.1109/ITC-CSCC55581.2022.9894896

Idle period frequency scaling to reduce dynamic power of display driver IC. / Kim, Woojoo; Chung, Eui Young.
ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications. Institute of Electrical and Electronics Engineers Inc., 2022. p. 464-467 (ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications).

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

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AB - The proportion of power consumption occupied by the display panel in the mobile device is increasing due to the driving the high frame rate and the increase in resolution. Among them, the power of the display driver IC (DDI), a core component that drives the display panel, was also increased. Recently, Variable Refresh Rate (VRR) technology has been widely used to reduce display panel power consumption, and to this end, DDI is also equipped with technology for VRR driving. During VRR operation, DDI can operate at a low frame rate, which is possible by extending the DDI idle period. During the idle period extension, dynamic power is still flowing because the clock is still toggling in the idle period. This paper introduces a frequency scaling technique through internal clock dividing in the idle period during the VRR operation. As a result of the frequency scaling we propose, at a sampling frame rate less than 60Hz, the power-saving effect of 8.82% on average and 11.11% on maximum can be confirmed through power simulation.

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Kim W, Chung EY. Idle period frequency scaling to reduce dynamic power of display driver IC. In ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications. Institute of Electrical and Electronics Engineers Inc. 2022. p. 464-467. (ITC-CSCC 2022 - 37th International Technical Conference on Circuits/Systems, Computers and Communications). doi: 10.1109/ITC-CSCC55581.2022.9894896

Idle period frequency scaling to reduce dynamic power of display driver IC

Abstract

Publication series

Conference

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

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Cite this