연세대 전기전자 기초실험 chapter. 6 (2017년판) 예렙+결렙
- 최초 등록일
- 2018.07.17
- 최종 저작일
- 2017.06
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압축파일
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소개글
2017학년도 1학기 전기전자응용실험을 수강하면서 작성한 레포트들입니다.
예비레포트+결과레포트로 구성되어있으며, 성적은 A+를 받았습니다.
처음 실험하시는 분들에게 참고용으로 좋을 것 같습니다.
목차
없음
본문내용
1-1. Touch Screen
We will make 9-point Touch Screen(Sensor) in this Experiment. When we touch the Touch Screen Sensor, positions of finger can be detected. When we touch the panel, we should hold the ground node on the other finger. Touch Screen is consist of transparent panel, Clock Generator, Analog to Digital converter, Analog Front-end Circuit. [Figure. 1] shows Touch Screen circuit. So what is the principle of touchscreen? Working principle is due to Touch Screen's capacitor. In this situation, Capacitor is divided to Self Capacitance-electrical modeling and Mutual Capacitance-electrical modeling. Let's learn about that. 1-1-1. Self Capacitance-electrical modeling
In Self Capacitance-electrical modeling, all the electro nodes are grounded. (Capacitance of loads is zero, like short circuit) So in steady state, which is same as not touch state, current flows to ground formally. And each electro nodes' current(or load capacitance) is detected by sensor. When I touch the screen, the circuit's state changes.
참고 자료
Electric Circuits tenth edition Nilsson/Riedel
Microelectronics second edition Behzad Razavi
PPT Slide of Chapter #5
PPT Slide of Chapter #6
Wikipedia Charge Amplifier, 「https://en.wikipedia.org/wiki/Charge_amplifier」
Wikipedia Touch Screen, 「https://en.wikipedia.org/wiki/Touchscreen」
The 3M Touch Technology Brief pdf ? Projected Capacitive Technology
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Result report6.hwp
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