While oil and water don't mix, LG Philips has decided otherwise by filing a patent that combines both oil and water capsule technology that will be used in an electronic ink display, fused with Organic LED (OLED) technology found in flexible displays...
link:http://www.ubergizmo.com/15/archives/2007/07/eink_display_use_oil_and_water.html

http://www.gearlog.com/2007/07/lg_philips_patents_oil_and_wat.php