Driving Waveform Design of Electrowetting Displays Based on an Exponential Function for a Stable Grayscale and a Short Driving Time
| Autor: | Guofu Zhou, Huang Zhenyu, Lingling Shui, Wang Li, He Wenyao, Lai Shufa, Zichuan Yi, Chongfu Zhang, Feng Chi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:Mechanical engineering and machinery
exponential function 02 engineering and technology 01 natural sciences Grayscale Article aperture ratio Control theory 0103 physical sciences Waveform lcsh:TJ1-1570 Electrical and Electronic Engineering electrowetting display 010306 general physics driving waveform Mathematics Oscillation Mechanical Engineering Time constant time constant 021001 nanoscience & nanotechnology Exponential function Control and Systems Engineering Electrowetting 0210 nano-technology Constant (mathematics) Voltage |
| Zdroj: | Micromachines Volume 11 Issue 3 Micromachines, Vol 11, Iss 3, p 313 (2020) |
| ISSN: | 2072-666X |
| Popis: | The traditional driving waveform of the electrowetting display (EWD) has many disadvantages, such as the large oscillation of the target grayscale aperture ratio and a long time for achieving grayscale. Therefore, a driving waveform based on the exponential function was proposed in this study. First, the maximum driving voltage value of 30 V was obtained by testing the hysteresis curve of the EWD pixel unit. Secondly, the influence of the time constant on the driving waveform was analyzed, and the optimal time constant of the exponential function was designed by testing the performance of the aperture ratio. Lastly, an EWD panel was used to test the driving effect of the exponential-function-driving waveform. The experimental results showed that a stable grayscale and a short driving time could be realized when the appropriate time constant value was designed for driving EWDs. The aperture ratio oscillation range of the gray scale could be reduced within 0.95%, and the driving time of a stable grayscale was reduced by 30% compared with the traditional driving waveform. |
| Databáze: | OpenAIRE |
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