电润湿显示器件的电场动态响应特性对其性能的影响

Effect of Field Dynamic Response Characteristics on the Functional Characteristics of Electrofluidic Display Devices

选用基于Teflon AF1600为绝缘层的电润湿显示器件,研究了电润湿显示器件的电场动态响应特性对其显示性能的影响,并分析了缺陷产生的机理.结果表明,区域像素电容值显著低于理想电容值的显示器件损坏率高,且开口率较低;区域像素电容值显著高于理想电容值的显示器件阈值电压较高,同时开口率也不理想;区域像素电容值接近于理想电容值的显示器件的显示性能普遍良好.而器件的损耗因数过大降低了像素电容的参考准确性.拆件分析也发现,区域像素电容值低的器件制备过程中引入的Na+,使得溶液电导通性发生改变,致使器件耐压下降;区域像素电容值高的器件,其绝缘层边缘过薄甚至部分无覆盖,致使其灵敏度降低,阈值电压升高.

Research on how the field dynamic response characteristics affect the functional characteristics of Electrofluidic display devices based on Teflon AF1600 Insulating layer is conducted. Results show： Devices with a pixel unit capacitance which is significantly lower than the ideal capacitance are more likely to be damaged, and their opening rates are low. Devices with a pixel unit capacitance which is significantly higher than the ideal capacitance requires higher threshold voltages; and the opening rates are also not high enough. Devices with a pixel unit capacitance which is close to the ideal capacitance usually have better functional performances. High loss factors will lower down the accuracy of capacitance measurements. After samples being opened and tested the results are： For those devices with a low pixel unit capacitance, Na ＋ was found in them. Na^＋ changed their conductance connectivity, making their tolerances of high voltages become low and get damaged easier. For those devices with a high pixel unit capacitance, their insulating layers are too thin or bared at the edge, which makes them become insensitive at applied voltages, leading to higher threshold voltages.