A Highly Sensitive Capacitive Touch Sensor Integrated on a Thin-Film-Encapsulated Active-Matrix OLED for Ultrathin Displays
- Authors
- Kim, Sunkook; Choi, Woong; Rim, Woojin; Chun, Youngtea; Shim, Hongsik; Kwon, Hyukjun; Kim, Jongsoo; Kee, Inseo; Kim, Sungchul; Lee, SangYoon; Park, Jongsun
- Issue Date
- 10월-2011
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Active-matrix organic light-emitting diode (AMOLED); capacitive touch sensor (Cap-TSP); noise; ultrathin display
- Citation
- IEEE TRANSACTIONS ON ELECTRON DEVICES, v.58, no.10, pp.3609 - 3615
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON ELECTRON DEVICES
- Volume
- 58
- Number
- 10
- Start Page
- 3609
- End Page
- 3615
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/111519
- DOI
- 10.1109/TED.2011.2162844
- ISSN
- 0018-9383
- Abstract
- This paper presents ultrathin and highly sensitive input/output devices consisting of a capacitive touch sensor (Cap-TSP) integrated on thin-film-encapsulated active-matrix organic light-emitting diodes (OLEDs). The optimal structure of the electrically noise-free capacitive touch sensor, which is assembled on a thin-film-encapsulated active-matrix OLED (AMOLED) display, is obtained by investigating the internal electrical field distribution and capacitance change based on the Q3D Extractor model. Electrostatic simulations have verified malfunction-free electrical signals for 4-in diagonal-sized capacitive touch sensors on AMOLEDs possessing a 100-mu m-thick optically clear adhesive (OCA, epsilon(r) = 1.4) layer. The prototype OLED platform using the capacitive touch sensors exhibits an overall thickness of 1.2 mm, which is the lowest thickness for commercially available OLED platforms.
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