Paper Info
Title
A 0.4 V driving multi-touch capacitive sensor with the driving signal frequency set to (n+0.5) times the inverse of the LCD VCOM noise period
Abstract
The time-periodic property of the LCD VCOM noise is utilized to reduce the effect of the VCOM noise on the mutual-capacitance measuring touch sensor placed on a LCD panel. The amplitude of the touch sensor driving signal (VSTM) can be reduced reliably down to 0.4 V with the reporting rate of 189 Hz, by using the following two methods. (1) The frequency of VSTM is set to (n+0.5)·fN, by synchronizing VSTM to a LCD gate driver signal with a referenceless CDR. fN is the inverse of the LCD VCOM noise period (TN) and n is a positive integer. (2) The reset period of the RX integrator is set to 2·TN.
Year
DOI
Venue
2014
10.1109/ISCAS.2014.6865227
ISCAS
Keywords
Field
DocType
touch sensor,vcom noise,driving signal frequency,driver circuits,multitouch capacitive sensor,capacitance measurement,capacitive sensors,lcd gate driver signal,mutual-capacitance measuring touch sensor,vstm,frequency 189 hz,voltage 0.4 v,tactile sensors,touch sensor driving signal amplitude,lcd vcom noise period,liquid crystal displays,cdr,mutual-capacitance,time-periodic property,noise,mutual capacitance,electrodes,logic gates,noise measurement
Inverse,Computer science,Synchronizing,Integrator,Capacitive sensing,Electronic engineering,Liquid-crystal display,Multi-touch,Amplitude,Electrical engineering,Gate driver
Conference
ISSN
Citations 
PageRank 
0271-4302
0
0.34
References 
Authors
1
7
Name
Order
Citations
PageRank
Jae-Seung Lee15816.02
Dong-Hee Yeo200.34
S. -H. Lee331160.11
Hye-Jung Kwon481.29
Jae-yoon Sim550883.58
Byungsub Kim616537.71
Hong-june Park746572.93