Microdot reflective channel display with color control by sub-pixel

Abstract

This paper describes the multi-color microfluidic display with sub-pixels, especially the design strategy of the display. Our display has four primary color sub-pixels in the single pixel, and shows various colors by patterning the ON/OFF of sub-pixels (dyed-fluid show ON, and air show OFF). To show high quality and richly tonal color images on our display, small sub-pixels and large screen are required. However, the driving pressure must be greater than the pressure drop caused by the friction between the fluid and the channel wall, and the driving pressure limits the display design. Therefore, the quantitative design strategy of our display is essential for commercial application. Then, we calculated the driving pressure, and revealed the relationship between the driving pressure and the display resolution (sub-pixel size) and the screen area (the number of the sub-pixels). Finally, we confirmed the smoother color mixing by high resolution and large screen display.