TY - JOUR
T1 - Design and implementation of readout circuit on glass substrate with digital correction for touch-panel applications
AU - Wang, Tzu Ming
AU - Ker, Ming-Dou
PY - 2011/7
Y1 - 2011/7
N2 - A readout circuit on glass substrate with digital correction, which contains a transconductance amplifier, counter, and digital correction circuit, has been designed for touch-panel applications for 3-μm low-temperature polysilicon (LTPS) technology. The voltage difference as a result of a change in capacitance due to a touch event is converted to current by a transconductance amplifier. By charging and discharging the capacitor in the counter, the counter displays different digital-output codes according to touch or non-touch events. Furthermore, not only can the touch or non-touch event be distinguished, but also the influence of LTPS process variation can be compensated by a digital correction circuit in the proposed readout circuit.
AB - A readout circuit on glass substrate with digital correction, which contains a transconductance amplifier, counter, and digital correction circuit, has been designed for touch-panel applications for 3-μm low-temperature polysilicon (LTPS) technology. The voltage difference as a result of a change in capacitance due to a touch event is converted to current by a transconductance amplifier. By charging and discharging the capacitor in the counter, the counter displays different digital-output codes according to touch or non-touch events. Furthermore, not only can the touch or non-touch event be distinguished, but also the influence of LTPS process variation can be compensated by a digital correction circuit in the proposed readout circuit.
KW - Digital correction
KW - Low-temperature polysilicon (LTPS)
KW - Readout circuit
KW - System-on-panel (SOP)
KW - Touch panel
UR - http://www.scopus.com/inward/record.url?scp=79959577311&partnerID=8YFLogxK
U2 - 10.1889/JSID19.7.463
DO - 10.1889/JSID19.7.463
M3 - Article
AN - SCOPUS:79959577311
SN - 1071-0922
VL - 19
SP - 463
EP - 470
JO - Journal of the Society for Information Display
JF - Journal of the Society for Information Display
IS - 7
ER -