Electronic readers, with their attractive functionality, are a rapidly growing market despite shortcomings of the most commonly used e-paper technology, electrophoretic displays (EPDs).1 The limitations include a slow response time not suitable for video operation, relatively low contrast, and an absence of color. However, since EPD e-readers operate using ambient light (in reflective mode), they have very low power consumption, resulting in long battery operation. The current main competition comes from liquid crystal display-based tablets, which use backlit transmissive displays with full color and video. Tablets have many additional capabilities beyond being e-readers. However, they consume more power and are generally bulkier and heavier than EPDs. Another approach (see Figure 1) being pursued uses electrowetting2 (EW) to form a light valve by moving two immiscible liquids (one clear and one colored) in and out of the light path by applying an electric field. Figure 2(a) shows a schematic illustration of the EW effect in a pixel containing oil and water for zero and applied bias along with photographs of a portion of an array under corresponding conditions. EW technology has many applications, including flat-panel displays, electronic-focus lenses, and microfluidic devices. The EW light-valve display approach is quite versatile, allowing for reflective,3 transmissive,4, 5 and even emissive6 operation. Most important, its switching speed is in the millisecond time range,3, 6 which enables video operation. An important consideration in all display technologies is power consumption. In EW displays, several approaches for minimizing power use have been reported, including bistable,7 multi-value stable,8 and complementary operation.9 Figure 2(b) shows complementary operation of EW devices under applied voltage. We have achieved a reversal of the normal twofluid competitive (water vs. oil) EW on a dielectric by plasma Figure 1. Flexible electronic-paper technology.