Browsing by Author "Shiu, Jyh-Wen"

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A Development of Color-filter-free Electrowetting Color Display by Using Ink Jet Printing Technology
(2010)
Kuo, Shu-Wei
;
Lo, Kuo-Long
;
Cheng, Wei-Yuan
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Ku, Yun-Sheng
;
Lee, Hsin-Hung
We evaluated the single layer multi-color electrowetting display (EWD) device by using various colored oils without adopting color filter. The color mediums were various colored oil that dosed into sub-pixels by ink jet printing (IJP) technique. In order to improve the color saturation of EWD, the dissolved fluxes had used to increase the solubility of various dyes. The colored saturation could increase about 50%. However, the unstable fluid movement was observed under AC square waveform driving. Therefore, simulation was utilized to analyze the phenomenon of unstable fluid movement. After optimizing the electrode pattern design of the EWD, the improvement of fluid movement was achieved.
Single-layered multi-color electrowetting display by using ink-jet-printing technology and fluid-motion prediction with simulation
(2011-07-01)
Ku, Yun-Sheng
;
Kuo, Shu-Wei
;
Huang, Yu-Sheng
;
Chen, Ching-Yao
;
Lo, Kuo-Long
This paper describes a single-layered multi-color electrowetting display (EWD) by using ink-jet-printing (IJP) technology and comparing different pattern electrodes with the use of the numerical investigations of ANSYS FLUENT (R). This work consists of two parts: the first describes the design of implementing a single-layered multi-color EWD and the second demonstrates the application of ANSYS FLUENT (R) simulation in different pattern electrodes settings on the proposed EWD. The single-layered multi-color EW device was evaluated by using various colored oils without adopting a color filter. The single-layered multi-color EWD at a driving voltage of 25 V can achieve a maximum aperture ratio and reflectivity of 80% and 38.5%, respectively. The colored saturation of R, G, B oils can increase to 50% (NTSC: 13.3-27.8%). In addition, a radiate electrode at the required viewable area condition of 85% and force 5 * F(k), which results in ink stable contraction and a shorter response time of 50% (radiate vs. square), was proposed. The experimental results and simulation demonstrate that ink-jet-printing (IJP) technology along with the use of radiate electrodes can result in a single-layered multi-color EWD with a shorter response time.