Title :
Two-stage charge sensing circuit for a mutual-capacitive touch screen panel
Author :
Hoshin Cho ; Sang-Jin Lee ; Seok-Man Kim ; Cha-Keon Cheong ; Kyoungrok Cho
Author_Institution :
Coll. of Electr. & Comput. Eng., Chungbuk Nat. Univ., Cheongju, South Korea
Abstract :
In this paper, we introduce a new charge sensing circuit for a mutual-capacitive touch screen panel (TSP). The circuit senses charges in two stages: a sensing stage and an evaluation stage when the TSP is touched or untouched. This method establishes easier recognition of a touch event on the TSP and reduces the size of the on-chip sensing capacitors. The dynamic sensing range of this TSP is improved by 38% over that of a conventional TSP.
Keywords :
capacitive sensors; charge measurement; touch sensitive screens; TSP; dynamic sensing range; evaluation stage; mutual-capacitive touch screen panel; on-chip sensing capacitor; touch event recognition; two-stage charge sensing circuit; Capacitance; Capacitors; Computer architecture; Educational institutions; Fingers; Sensors; TV;
Conference_Titel :
Consumer Electronics (ICCE), 2013 IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4673-1361-2
DOI :
10.1109/ICCE.2013.6486971
