The Positioning Method of Opposition Searching for the Coordinate of 5-Wire Resistive Touch Screen

Abstract:

This paper proposed a coordinate positioning method of 5-wire resistive touch screen. The 5-wire resistive touch screen applying a constant current from the four corners of the lower conductive layer, and all current flowing out from upper conductive layer. When positioning touch coordinates, first set initial preset point. Then measure the actual diagonal voltage of the touch point. Use the opposition searching method to calculate the theoretical diagonal voltage about preset and searching point. Take the theoretical minimum error diagonal voltage point as the new preset point and then searching repeatedly so that the touch point can be approached finally. The method solves the problem about nonlinear equations solution and distortion correction of the 5-wire resistive touch screen without the compensation electrode. It can narrow the frame of the 5-wire resistive touch screen and broaden its applications in a small screen.

• Periodical: Applied Mechanics and Materials (Volumes 644-650)
• Pages: 2484-2488
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.644-650.2484
• Online since: September 2014
• Authors: Yun Ling*, Fei Li, Huan Chen
• Keywords: 5-Wire Resistive Touch Screen, Coordinates, Nonlinear, Opposition Searching

References

[1] CAI Hong-juan, GAO Heng qiang, Cai Miao. The optimization to calibration algorithm of resistive touch screen. Manufacturing Automation, 2012, 34(7): 21-23.

[2] WANG Dang-li, Ma Bao ji, Ning Sheng ke. Error analysis of resistance touch screen and the data processing based on acceleration model. Journal of Shaanxi University of Techno logy ( Natural Science Edition), 2009, 25(4): 15-19.

[3] TAN Cui-lan, HE Li yan. The optimization to calibration algorithm of resistive touch screen. Journal of Jianghan University Natural Science Edition, 2011, 39(2): 19-21.

[4] LIU Zhong-an , XU Wei dong, Quan lei , etc. Development of the High Reliability Resistive Touch Panel. Optoelectronic Technology, 2009, 29(4): 226-229.

[5] LIU Rong-lin, LIU Ya-kun, Wu Hua, CHENG Xiao-dong. Design of the Embedded Touch-screen Based on ARM. Journal of Inner Mongolia University, 2009, 40(6): 708-711.

[6] LUO Yong gang, XIA Ding chun. Research on justified and application about Resistive Touch screen. Journal of Wuhan University of Science and Engineering, 2007, 20(12): 47-49.