Design of touch signal readout IC for capacitive touch screen using dual mode sensing algorithmDual mode sensing algorithm 을 적용한 정전용량방식 터치스크린용 readout IC 설계

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dc.contributor.advisorRyu, Seung-Tak-
dc.contributor.advisor류승탁-
dc.contributor.authorKim, Hyeon-June-
dc.contributor.author김현준-
dc.date.accessioned2017-03-29T02:37:32Z-
dc.date.available2017-03-29T02:37:32Z-
dc.date.issued2012-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=657250&flag=dissertationen_US
dc.identifier.urihttp://hdl.handle.net/10203/221711-
dc.description학위논문(석사) - 한국과학기술원 : 전기및전자공학과, 2012.2 ,[vi, 58 p. :]-
dc.description.abstractThis work presents a high performance capacitive touch screen readout IC for medium-large size touch screen panel applications. Among the technical challenges that must be solved in medium-large size touch screen panel, touch signal sensing speed and power consumption are the most critical problems because the more increasing touch screen panel size is, the more increasing touch screen panel pixels to readout signal information is. Also, External noises in harsh environment are critical problems. Conventional capacitive touch screen readout ICs solve touch signal sensing speed issue in medium-large size with many readout circuit per each column line of touch screen panel, causing high power consumption. The relationship of speed and power is trade off. To solve this problem, Dual Mode Sensing Algorithm is proposed. The trade off relationship is broken by this algorithm. Also it is required to solve external noise issues like peak noise from touch screen panel bottom plate, sine noise from finger capacitance. So, continuous time integration and signal limitation concept using gm cell is proposed. Speed and power consumption performance can be greatly enhanced applying Dual Mode Sensing Algorithm. Also this algorithm operation is not all but influenced by external noise using gm cell. This work is implemented with 0.35 $\mu m$ CMOS technology. Target specification of touch screen panel size is 44(Rx) by 27(Tx). Total scanning speed is 100Hz at 1~2 touch and 50Hz at 9~10 touch. Scanning frequency for driving touch screen panel is 200Hz.-
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectCapacitive touch screen-
dc.subjectMedium-large touch screen-
dc.subjectCapacitive readout IC-
dc.subjectDual mode sensing algorithm-
dc.subjectSignal limitation concept-
dc.subject정전용량방식터치스크린-
dc.subject-
dc.subject대형 터치스크린-
dc.subject캐패시티브 리드아웃 아이씨-
dc.subject듀얼모드센싱알고리즘-
dc.subject시그널리밋컨셉-
dc.titleDesign of touch signal readout IC for capacitive touch screen using dual mode sensing algorithm-
dc.title.alternativeDual mode sensing algorithm 을 적용한 정전용량방식 터치스크린용 readout IC 설계-
dc.typeThesis(Master)-
dc.identifier.CNRN325007-
dc.description.department한국과학기술원 :전기및전자공학과,-
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