A panel manufacturing process for multi‐color electrowetting display (EWD) by using ink‐jet printing (IJP) technique had been developed. To achieve multi‐color, two strategies were used, i.e., by using black oil with color filter and by using various colored oils without adopting color filter. for colored oils, various dyes had been used to blend with alkane solution. Then, the jetting behavior of different colored oil for IJP was investigated. Here, a 6‐inch multi‐color EWD prototype with black oil and color filter was successfully fabricated, and a dual color EWD panel with black and red oils had also been first evaluated.

A 3.5 inch with 480x320 dot resolution bendable mono/color active matrix electrowetting display had been developed. This color display can be made by COA substrate and a simple black oil dosing process. Along with a special thinning technology and composite substrate design, a mono/color bendable AMEWD could be easily fabricated.

Smart window is an emerging application for display industry. It can control the sunlight penetration and display information. In this paper, we had made 6-inch color smart window prototype by electrowetting-based technique. The ink jet process is adopted to dose various colored oil into sub-pixel to achieve color device. Without color filter, the transmittance of the device can be improved. Further, to evaluate the practicability of using the smart window device in the night, we had added luminescence substances into the colored oils and designed the cladding structure to achieve a luminous smart window.