触摸屏微结构光管的设计

Liu Peng-fei
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引用次数: 0

摘要

触摸屏有着非常广泛的应用。触摸屏多用于公共信息查询,如电信局、税务局、银行系统、电力部门的业务查询等。触摸屏也可用于娱乐和虚拟现实应用。传统的触摸屏是由一对红外LED和相应的接收器组成的,它们都安装在屏幕框架中。在红外触摸屏边框的相邻两侧设置LED阵列,在相对两侧固定红外接收器阵列,形成红外探测网络。但目前红外触摸屏存在分辨率低、触摸方式受限、受环境干扰导致的故障响应等技术局限性。塑料材料对红外光的吸收率相对较高,这极大地限制了触摸屏的尺寸。本设计采用激光二极管作为光源,改变了触摸屏传统的内部结构。通过使用具有微结构的光管。通过方程求解得到了光管的几何参数和微观结构。仿真结果表明,本文提出的触摸屏设计方法能够实现高分辨率和大尺寸的触摸屏。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Design of Light Pipe with Microstructures for Touch Screen
Touch screen has a very wide range of applications.Most of them are used in public information inquiries,for instance,service inquiries in telecommunication bureau,tax bureau,bank system,electric department … Touch screen can also be used for entertainment and virtual reality applications too.Traditionally,touch screen was composed of pairs of infrared LED and correspondent receivers which were all installed in the screen frame.Arrays of LED were set in the adjacent sides of the frame of an infrared touch screen while arrays of the infrared receivers were fixed in each opposite side,so that the infrared detecting network was formed.While the infrared touch screen has some technical limitations nowadays such as the low resolution,limitations of touching methods and fault response due to environmental disturbances.The plastic material has a relatively high absorption rate for infrared light,which greatly limits the size of the touch screen.Our design use laser diode as source and change the traditional inner structure of touch screen.by using a light pipe with microstructures.The geometric parameters of the light pipe and the microstructures were obtained through equation solving.Simulation results prove that the design method for touch screen proposed in this paper could achieve high resolution ratio(R.R.) and large size of touch screen.
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