A 2D Refreshable Braille Display Based on a Stiffness Variable Polymer and Pneumatic Actuation.
A 2D Refreshable Braille Display Based on a Stiffness Variable Polymer and Pneumatic Actuation.
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基于刚度可变聚合物和气动驱动的 2D 可刷新盲文显示器。
DOI：
10.1117/12.2584039
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Pei,Qibing
中科院分区：
文献类型：
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作者：
Xie,Zhixin;Kim,Jinsung;Peng,Zihang;Qiu,Yu;Pei,Qibing
视觉障碍限制了一个人处理信息的能力，如障碍物、环境、阅读，尤其是多媒体内容（如照片和视频）。在这项工作中，我们介绍了Braille PolyPad的设计和操作机制，这是一种具有4×10盲文细胞的2D可刷新盲文显示器原型，可以将图像转换为2D盲文信息。盲文Polypad是基于一个微型泵使盲文针气动驱动。编码器将模式信息转换为加热电路，以触发刚度可变聚合物的软化，从而允许在软化的引脚区域进行大型气动驱动。盲文图案无论有多少个盲文单元和针脚，每次开关时间都在0.5s内，工作电压低，功耗低。这项工作的技术特点可以使低成本，大尺寸的矩阵可刷新盲文显示器在紧凑的外形因素。原型装置的全面开发仍在进行中，包括材料优化、驱动均匀性和用户友好控制界面的改进。
Visual impairments limit a person’s ability to process information such as obstacles, environments, reading and especially multimedia content (e.g., photographs and videos). In this work, we present the design and operating mechanism of Braille PolyPad, a prototype 2D refreshable braille display featuring 4×10 braille cells, enabling the transformation of images to 2D braille information. The Braille Polypad is based on a miniature pump enabled pneumatic actuation of Braille pins. The encoder transformed the pattern information to a heating circuits to trigger the softening of a stiffness variable polymer, allowing for large pneumatic actuation in the softened pin area. The braille pattern can switch on and off in 0.5s each regardless of the number of braille cells and pins, with low operation voltage and low power consumption. The technical features in this work could enable low-cost, large-size matrix refreshable braille displays in compact form factor. Full development of the prototype device is still ongoing, including materials optimization, actuation uniformity, and improvement of user-friendly control interface.