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A real-time touch control system design based on field-programmable gate array via optimizing Bresenham algorithm for electrowetting displays
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2021-03-16 , DOI: 10.1002/jsid.1001 Zichuan Yi 1 , Wenjun Zeng 1, 2 , Caiyun Ma 3 , Haoqiang Feng 1, 2 , Jianjun Yang 1 , Liming Liu 1 , Zhi Zhang 1 , Lingling Shui 1 , Guofu Zhou 2, 3 , Chongfu Zhang 1
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2021-03-16 , DOI: 10.1002/jsid.1001 Zichuan Yi 1 , Wenjun Zeng 1, 2 , Caiyun Ma 3 , Haoqiang Feng 1, 2 , Jianjun Yang 1 , Liming Liu 1 , Zhi Zhang 1 , Lingling Shui 1 , Guofu Zhou 2, 3 , Chongfu Zhang 1
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Electrowetting displays (EWDs) have the advantages of fast response speed and extremely low energy consumption. However, the function of real-time touch control has not been realized in EWDs, and the rendering of hand-drawn lines by a pixelated display has room for improvement, especially in the diagonal directions. The issue of clearly rendering diagonal lines drawn by touch control is not specific to EWDs, and the solution we offer can be beneficial to other display technologies. In this paper, a real-time touch control system, which was based on field-programmable gate array (FPGA) by optimizing Bresenham algorithm, was realized in EWDs. In hardware, Nios II processor was used as a main controller, I2C bus communication mode was used to establish a communication between a touch screen and the main controller, and MXEI1480 and MXEI2240 were used as driving chips to complete the design of EWD driver module. In software, Bresenham algorithm was optimized to add pixel points at diagonal corners for improving the clarity of line rendering. Then, touch coordinates were transmitted to the EWD driver module for displaying lines rendered. Experimental results showed that the lines rendered on the display by the optimized Bresenham algorithm were thicker and clearer.
中文翻译：
基于现场可编程门阵列的电润湿显示器优化Bresenham算法的实时触摸控制系统设计
电润湿显示器（EWD）具有响应速度快、能耗极低的优点。然而，EWDs并没有实现实时触控的功能，像素化显示器对手绘线的渲染还有改进的空间，尤其是在对角线方向。清晰呈现触控绘制的对角线问题并非 EWD 所特有，我们提供的解决方案可以有益于其他显示技术。本文通过优化Bresenham算法，在EWD中实现了一种基于现场可编程门阵列(FPGA)的实时触摸控制系统。硬件方面采用Nios II处理器作为主控制器，I 2触摸屏与主控制器之间采用C总线通信方式建立通信，采用MXEI1480和MXEI2240作为驱动芯片完成EWD驱动模块的设计。在软件上，优化了Bresenham算法，在对角线角处添加像素点，提高线条渲染的清晰度。然后，触摸坐标被传输到 EWD 驱动模块以显示渲染的线条。实验结果表明，优化后的 Bresenham 算法在显示器上呈现的线条更粗更清晰。
更新日期：2021-03-16
中文翻译：
基于现场可编程门阵列的电润湿显示器优化Bresenham算法的实时触摸控制系统设计
电润湿显示器（EWD）具有响应速度快、能耗极低的优点。然而，EWDs并没有实现实时触控的功能，像素化显示器对手绘线的渲染还有改进的空间，尤其是在对角线方向。清晰呈现触控绘制的对角线问题并非 EWD 所特有，我们提供的解决方案可以有益于其他显示技术。本文通过优化Bresenham算法，在EWD中实现了一种基于现场可编程门阵列(FPGA)的实时触摸控制系统。硬件方面采用Nios II处理器作为主控制器，I 2触摸屏与主控制器之间采用C总线通信方式建立通信，采用MXEI1480和MXEI2240作为驱动芯片完成EWD驱动模块的设计。在软件上，优化了Bresenham算法，在对角线角处添加像素点，提高线条渲染的清晰度。然后，触摸坐标被传输到 EWD 驱动模块以显示渲染的线条。实验结果表明，优化后的 Bresenham 算法在显示器上呈现的线条更粗更清晰。
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