Pseudo Random Pulse Driven Advanced In-Cell Touch Screen Panel for Spectrum Spread Electromagnetic Interference

Hoonbae Kim; Byung Wook Min

doi:10.1109/JSEN.2018.2813005

Pseudo Random Pulse Driven Advanced In-Cell Touch Screen Panel for Spectrum Spread Electromagnetic Interference

Hoonbae Kim, Byung Wook Min

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

For the first time, we analyze the mechanism of electromagnetic interference (EMI) in an advanced in-cell touch (AIT) panel, which is a state-of-the-art in-cell touch screen panel technology. The AIT panel has stronger EMI generation at a specific frequency band (0.15 30 MHz) due to a load free driving (LFD) method. The LFD is adopted to overcome the structural vulnerability of in-cell touch panel, which incurs large parasitic capacitance due to the touch electrodes within the display panel. In order to overcome the EMI problem, we present a novel driving method using pseudo random pulse (PRP). The power spectrum of PRP is well spread over the frequency band, resulting in a lower EMI. We measured the EMI level with a near-field probe, and the proposed driving method shows the EMI reduction of 6.5 dB. This EMI reduction is accomplished without structural reconfiguration, as well as the touch performance remains the same as that before PRP is applied. Therefore, the proposed driving method can be utilized in the field of automotive, military, and aviation industries as a user interface which requires high touch performance and low EMI generation due to the peculiarities.

Original language	English
Pages (from-to)	3669-3676
Number of pages	8
Journal	IEEE Sensors Journal
Volume	18
Issue number	9
DOIs	https://doi.org/10.1109/JSEN.2018.2813005
Publication status	Published - 2018 May 1

Bibliographical note

Funding Information:
Manuscript received January 14, 2018; revised February 28, 2018; accepted March 5, 2018. Date of publication March 7, 2018; date of current version April 9, 2018. This work was supported in part by MSIP, Korea, under the ITRC (IITP-2017-2014-0-00729) supervised by the IITP, and in part by LG Display Company Ltd., under Yonsei Incubation Program. The associate editor coordinating the review of this paper and approving it for publication was Prof. Ravinder S. Dahiya. (Corresponding author: Byung-Wook Min.) The authors are with the Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea (e-mail: bmin@yonsei.ac.kr). Digital Object Identifier 10.1109/JSEN.2018.2813005 Fig. 1. EMI compliance testing result of a 7-inch AIT panel by LG Display Co., Ltd.

Publisher Copyright:
© 2001-2012 IEEE.

All Science Journal Classification (ASJC) codes

Instrumentation
Electrical and Electronic Engineering

Access to Document

10.1109/JSEN.2018.2813005

Cite this

@article{c4892904113b43cabff1789ef8fb7ca9,

title = "Pseudo Random Pulse Driven Advanced In-Cell Touch Screen Panel for Spectrum Spread Electromagnetic Interference",

abstract = "For the first time, we analyze the mechanism of electromagnetic interference (EMI) in an advanced in-cell touch (AIT) panel, which is a state-of-the-art in-cell touch screen panel technology. The AIT panel has stronger EMI generation at a specific frequency band (0.15 30 MHz) due to a load free driving (LFD) method. The LFD is adopted to overcome the structural vulnerability of in-cell touch panel, which incurs large parasitic capacitance due to the touch electrodes within the display panel. In order to overcome the EMI problem, we present a novel driving method using pseudo random pulse (PRP). The power spectrum of PRP is well spread over the frequency band, resulting in a lower EMI. We measured the EMI level with a near-field probe, and the proposed driving method shows the EMI reduction of 6.5 dB. This EMI reduction is accomplished without structural reconfiguration, as well as the touch performance remains the same as that before PRP is applied. Therefore, the proposed driving method can be utilized in the field of automotive, military, and aviation industries as a user interface which requires high touch performance and low EMI generation due to the peculiarities.",

author = "Hoonbae Kim and Min, {Byung Wook}",

note = "Funding Information: Manuscript received January 14, 2018; revised February 28, 2018; accepted March 5, 2018. Date of publication March 7, 2018; date of current version April 9, 2018. This work was supported in part by MSIP, Korea, under the ITRC (IITP-2017-2014-0-00729) supervised by the IITP, and in part by LG Display Company Ltd., under Yonsei Incubation Program. The associate editor coordinating the review of this paper and approving it for publication was Prof. Ravinder S. Dahiya. (Corresponding author: Byung-Wook Min.) The authors are with the Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea (e-mail: bmin@yonsei.ac.kr). Digital Object Identifier 10.1109/JSEN.2018.2813005 Fig. 1. EMI compliance testing result of a 7-inch AIT panel by LG Display Co., Ltd. Publisher Copyright: {\textcopyright} 2001-2012 IEEE.",

year = "2018",

month = may,

day = "1",

doi = "10.1109/JSEN.2018.2813005",

language = "English",

volume = "18",

pages = "3669--3676",

journal = "IEEE Sensors Journal",

issn = "1530-437X",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "9",

}

TY - JOUR

T1 - Pseudo Random Pulse Driven Advanced In-Cell Touch Screen Panel for Spectrum Spread Electromagnetic Interference

AU - Kim, Hoonbae

AU - Min, Byung Wook

N1 - Funding Information: Manuscript received January 14, 2018; revised February 28, 2018; accepted March 5, 2018. Date of publication March 7, 2018; date of current version April 9, 2018. This work was supported in part by MSIP, Korea, under the ITRC (IITP-2017-2014-0-00729) supervised by the IITP, and in part by LG Display Company Ltd., under Yonsei Incubation Program. The associate editor coordinating the review of this paper and approving it for publication was Prof. Ravinder S. Dahiya. (Corresponding author: Byung-Wook Min.) The authors are with the Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea (e-mail: bmin@yonsei.ac.kr). Digital Object Identifier 10.1109/JSEN.2018.2813005 Fig. 1. EMI compliance testing result of a 7-inch AIT panel by LG Display Co., Ltd. Publisher Copyright: © 2001-2012 IEEE.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - For the first time, we analyze the mechanism of electromagnetic interference (EMI) in an advanced in-cell touch (AIT) panel, which is a state-of-the-art in-cell touch screen panel technology. The AIT panel has stronger EMI generation at a specific frequency band (0.15 30 MHz) due to a load free driving (LFD) method. The LFD is adopted to overcome the structural vulnerability of in-cell touch panel, which incurs large parasitic capacitance due to the touch electrodes within the display panel. In order to overcome the EMI problem, we present a novel driving method using pseudo random pulse (PRP). The power spectrum of PRP is well spread over the frequency band, resulting in a lower EMI. We measured the EMI level with a near-field probe, and the proposed driving method shows the EMI reduction of 6.5 dB. This EMI reduction is accomplished without structural reconfiguration, as well as the touch performance remains the same as that before PRP is applied. Therefore, the proposed driving method can be utilized in the field of automotive, military, and aviation industries as a user interface which requires high touch performance and low EMI generation due to the peculiarities.

AB - For the first time, we analyze the mechanism of electromagnetic interference (EMI) in an advanced in-cell touch (AIT) panel, which is a state-of-the-art in-cell touch screen panel technology. The AIT panel has stronger EMI generation at a specific frequency band (0.15 30 MHz) due to a load free driving (LFD) method. The LFD is adopted to overcome the structural vulnerability of in-cell touch panel, which incurs large parasitic capacitance due to the touch electrodes within the display panel. In order to overcome the EMI problem, we present a novel driving method using pseudo random pulse (PRP). The power spectrum of PRP is well spread over the frequency band, resulting in a lower EMI. We measured the EMI level with a near-field probe, and the proposed driving method shows the EMI reduction of 6.5 dB. This EMI reduction is accomplished without structural reconfiguration, as well as the touch performance remains the same as that before PRP is applied. Therefore, the proposed driving method can be utilized in the field of automotive, military, and aviation industries as a user interface which requires high touch performance and low EMI generation due to the peculiarities.

UR - http://www.scopus.com/inward/record.url?scp=85043355548&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85043355548&partnerID=8YFLogxK

U2 - 10.1109/JSEN.2018.2813005

DO - 10.1109/JSEN.2018.2813005

M3 - Article

AN - SCOPUS:85043355548

SN - 1530-437X

VL - 18

SP - 3669

EP - 3676

JO - IEEE Sensors Journal

JF - IEEE Sensors Journal

IS - 9

ER -

Pseudo Random Pulse Driven Advanced In-Cell Touch Screen Panel for Spectrum Spread Electromagnetic Interference

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this