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首页> 外文会议>Conference on Electroactive polymer actuators and devices;EAPAD >The Development of Compact Electroactive Polymer Actuators Suitable for Use in Full Page Braille Displays
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The Development of Compact Electroactive Polymer Actuators Suitable for Use in Full Page Braille Displays

机译：适用于整页盲文显示器的紧凑型电活性聚合物致动器的开发

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Piezoceramic actuators, presently used in commercial Braille displays, are limited by the material's relatively small strain and brittle nature. For this reason, it is a challenge to develop full page, compact, graphic Braille displays that are affordable. A newly developed material composed of P(VDF-TrFE-CFE) terpolymer blended with 5% P(VDF-CTFE) electrostrictive actuators exhibits large strains (~5% at 150V/μm), fast actuation (>5 mm/s), and has a relatively high elastic modulus (1.2 GPa). This material exhibits more than double the elastic energy density and a 50% higher modulus of the original electrostrictive terpolymer. Hence, the potential for viable actuators in compact, full page Braille displays is greater than ever, provided actuators can be manufactured reliably in quantity. This talk presents recent work in scaling production of such rolled actuators. Actuators extend .5 mm, are confined to the 2.5 mm grid spacing of conventional Braille text, generate >0.5 N force and operate at less than 200V, thus meeting the primary requirements for a commercialized Braille display. To manufacture these actuators, cast films are stretched using a roll-to-roll zone drawing machine that is capable of producing quantities of 2 μm thick film with high quality. What follows is a discussion of this machine, the roll-to-roll film stretching process and an assessment of the resulting stretched film for use as linear strain actuators, like those used in our Braille cell.
机译：当前在商业盲文显示器中使用的压电陶瓷致动器受到该材料相对较小的应变和脆性的限制。因此，开发负担得起的全页，紧凑的图形盲文显示器是一个挑战。由P（VDF-TrFE-CFE）三元共聚物与5％P（VDF-CTFE）电致伸缩执行器混合而成的新开发材料表现出大的应变（在150V /μm时约为5％），快速启动（> 5 mm / s），并且具有相对较高的弹性模量（1.2 GPa）。这种材料的弹性能密度是原始电致伸缩三元共聚物的两倍以上，并且模量高出50％。因此，如果能够可靠地批量生产执行器，那么紧凑，全页盲文显示器中可行执行器的潜力将比以往更大。该演讲介绍了在此类滚动执行器的规模生产中的最新工作。执行器延伸0.5毫米，限制在常规盲文文本的2.5毫米网格间距内，产生> 0.5 N的力，并在小于200V的电压下工作，因此满足了商业化盲文显示器的主要要求。为了制造这些执行器，使用能够生产大量高质量2μm厚薄膜的卷对卷区域拉伸机拉伸流延薄膜。接下来是对这台机器的讨论，卷对卷薄膜的拉伸过程以及对所得拉伸薄膜的评估，这些薄膜可用作线性应变致动器，就像我们的盲文单元中所使用的那样。

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