Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens

Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens

A novel touch screen control technique is introduced, which scans each frame in two steps of concurrent multichannel driving and differential sensing. The proposed technique substantially increases the scan rate and reduces the ambient noise effectively. It is also extended to a multichip architectu...

Full description

Bibliographic Details
Main Authors: Mohamed Gamal Ahmed Mohamed, HyungWon Kim
Format: Article
Language:English
Published: Hindawi Limited 2015-01-01
Series:Journal of Sensors
Online Access:http://dx.doi.org/10.1155/2015/768293
id doaj-3f6c47ed7da44d5aa6d054b1a46ee513
record_format Article
spelling doaj-3f6c47ed7da44d5aa6d054b1a46ee5132020-11-25T01:07:44ZengHindawi LimitedJournal of Sensors1687-725X1687-72682015-01-01201510.1155/2015/768293768293Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch ScreensMohamed Gamal Ahmed Mohamed0HyungWon Kim1Electronic Engineering Department, School of Electrical Engineering and Computer Science, Chungbuk National University, 1, Chungdae-ro, Seowon-gu, Cheongju-si, Chungcheongbuk-do 362-763, Republic of KoreaElectronic Engineering Department, School of Electrical Engineering and Computer Science, Chungbuk National University, 1, Chungdae-ro, Seowon-gu, Cheongju-si, Chungcheongbuk-do 362-763, Republic of KoreaA novel touch screen control technique is introduced, which scans each frame in two steps of concurrent multichannel driving and differential sensing. The proposed technique substantially increases the scan rate and reduces the ambient noise effectively. It is also extended to a multichip architecture to support excessively large touch screens with great scan rate improvement. The proposed method has been implemented using 0.18 μm CMOS TowerJazz process and tested with FPGA and AFE board connecting a 23-inch touch screen. Experimental results show a scan rate improvement of up to 23.8 times and an SNR improvement of 24.6 dB over the conventional method.http://dx.doi.org/10.1155/2015/768293
collection DOAJ
language English
format Article
sources DOAJ
author Mohamed Gamal Ahmed Mohamed
HyungWon Kim
spellingShingle Mohamed Gamal Ahmed Mohamed
HyungWon Kim
Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens
Journal of Sensors
author_facet Mohamed Gamal Ahmed Mohamed
HyungWon Kim
author_sort Mohamed Gamal Ahmed Mohamed
title Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens
title_short Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens
title_full Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens
title_fullStr Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens
title_full_unstemmed Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens
title_sort concurrent driving method with fast scan rate for large mutual capacitance touch screens
publisher Hindawi Limited
series Journal of Sensors
issn 1687-725X
1687-7268
publishDate 2015-01-01
description A novel touch screen control technique is introduced, which scans each frame in two steps of concurrent multichannel driving and differential sensing. The proposed technique substantially increases the scan rate and reduces the ambient noise effectively. It is also extended to a multichip architecture to support excessively large touch screens with great scan rate improvement. The proposed method has been implemented using 0.18 μm CMOS TowerJazz process and tested with FPGA and AFE board connecting a 23-inch touch screen. Experimental results show a scan rate improvement of up to 23.8 times and an SNR improvement of 24.6 dB over the conventional method.
url http://dx.doi.org/10.1155/2015/768293
work_keys_str_mv AT mohamedgamalahmedmohamed concurrentdrivingmethodwithfastscanrateforlargemutualcapacitancetouchscreens
AT hyungwonkim concurrentdrivingmethodwithfastscanrateforlargemutualcapacitancetouchscreens
_version_ 1725185668223598592

Similar Items