Electrophoretic Inks with Structural Color

结构色电泳油墨

• 批准号: 1236086
• 负责人: Eric Dufresne
• 金额: $ 30.24万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1236086&HistoricalAwards=false
• 关键词: Electrophoretic; Inks; Structural; Color

1236086PI: DufresneElectrophoretic displays based on charged colloidal pigments consume far less energy than conventional back-lit liquid crystal displays. In fact, a well-designed electrophoretic display with a static image consumes no energy. This energy savings arises from two important factors. First, electrophoretic displays are bistable, so they consume energy only when changing the displayed image. Second, electrophoretic displays use ambient light, instead of internal light sources. Therefore, electrophoretic displays are ideal for reading, signage and architectural applications. However, the central limitation of these displays is that they only produce black and white images. In principle, color images can be created from electrophoretic displays through the use of colored filters, as in an LCD display, but such devices would be too dark for most applications. Bright electrophoretic displays would require each pixel to be able to display either red, green or blue. To achieve this, this project will create electrophoretic inks with structural color. Inspired by color-producing nanostructures in bird feathers, this work will control the color of electrophoretic inks by tuning the spacing of charged colloidal particles. The spacing will be determined by interparticle forces and external electric fields. Thus, the color of the ink containing pixel will be switchable with an applied voltage. To achieve this goal, this project will need to solve several fundamental problems in colloid science. First, the research will identify general principles and specific materials for creating charged suspensions in non-polar solvents with sufficient short-range order to produce structural colors. Second, the research will characterize the effect of external electric fields on the structure of these suspensions.

1236086 PI：基于带电胶体颜料的电泳显示器比传统的背光液晶显示器消耗的能量少得多。 事实上，设计良好的静态图像电泳显示器不消耗能量。 这种节能源于两个重要因素。 首先，电泳显示器是可调谐的，因此它们仅在改变所显示的图像时消耗能量。 其次，电泳显示器使用环境光，而不是内部光源。 因此，电泳显示器对于阅读、标牌和建筑应用是理想的。 然而，这些显示器的中心限制是它们仅产生黑色和白色图像。 原则上，彩色图像可以通过使用彩色滤光片从电泳显示器中产生，如在LCD显示器中，但是这样的设备对于大多数应用来说太暗。 明亮的电泳显示器将要求每个像素能够显示红色、绿色或蓝色。 为了实现这一目标，本项目将创建具有结构色的电泳墨水。 受鸟类羽毛中产生颜色的纳米结构的启发，这项工作将通过调整带电胶体颗粒的间距来控制电泳墨水的颜色。 间距将由粒子间力和外部电场决定。 因此，含墨像素的颜色将可通过施加的电压切换。 为了实现这一目标，该项目将需要解决胶体科学中的几个基本问题。 首先，该研究将确定在非极性溶剂中产生带电悬浮液的一般原理和特定材料，这些材料具有足够的短程秩序以产生结构色。 其次，研究将表征外部电场对这些悬浮液结构的影响。