The Journal of the Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회논문지)

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
권호 표지
DOI QR코드

DOI QR Code

Implementation and Design of Control Circuit for Touch Screen with Faster Response Time

고속 응답 터치스크린 제어회로 설계 및 구현

  • 박상봉 (세명대학교 정보통신학부) ;
  • 허정화 (세명대학교 정보통신학부)
  • Received : 2014.01.20
  • Accepted : 2014.02.07
  • Published : 2014.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we describe algorithm and digital circuit implementation of touch screen controller that has the faster response time. We enhance the response time by adaptive search method instead of linear search method of step level in the pulse width decision. The faster response time might bring effects of feeling better in the touch keyboard. The performance of the proposed algorithm and function is verified by using logic simulation and FPGA test board. It is expected to use in the mobile touch screen.

본 논문은 디지털 회로로 구현된 터치스크린 제어 회로의 응답 속도를 빠르게 하기 위한 알고리즘과 회로구현을 기술하였다. 손가락이 터치되었을 때 해당하는 커패시턴스 값을 기존의 선형적인 방법대신에 적응형으로 탐색함으로써 응답 속도를 개선하였다. 응답 속도의 개선은 사용자가 터치 스크린을 이용하여 키보드 입력시 터치감을 높이는 효과를 가져온다. 시뮬레이션과 FPGA 검증을 통하여 제안된 알고리즘의 응답 속도 향상을 검증하였다. 모바일 터치 스크린 제품에 활용이 예상된다.

Keywords

References

  1. J. S. Park, J. M. Lim, K. W. Kyeong, "Tangible touch interface technology trends", Korean Information Processing Society Review, vol. 20, No 1, pp. 45-53, January 2013.
  2. S. K. Oh, G. D. Park, B. K. Kim, "Performance Comparison of the Recognition Methods of a Touched Area on a Touch-Screen Panel for Embedded Systems", Journal of the Korea Academia-Industrial cooperation Society, vol. 10, No. 9, pp.2334-2339, 2009. https://doi.org/10.5762/KAIS.2009.10.9.2334
  3. S. Y. Lee, H. S. Prak, M. K. Han, "A Touchsensitive Display with Embedded Hydrogenated Amorphoussilicon Photodetector Arrays", Journal of KIEE, Vol.58, No.11, pp.2219-2222, 2009
  4. Y. C. Cho, N. H. Chang, W. H. Kwon, "Pointing position detection of capacitive touch screen panel using phase-difference method", Journal of Institute of Control, Robotics and System, vol. 4, No 3, pp. 406-412, 1998.
  5. I. C. Kang, B. S. Kim, G. T. Hur, Y. H. Ko, "A Study on the Implementation of Multi-touch model using a Haptic Device in Virtual Reality", Journal of the Institute of Internet, Broadcasting and Communication, vol. 4, No. 13, pp. 83-89, August 2010.
  6. S. P. Choi, C. K. Kim, "Wireless and Multi point system based on Image Processing", Journal of Korean Institute of Information Technology, vol. 11, No. 8, pp. 45-53, August 2013.