Fig. 1. （a）Structure and principle of planar electrowetting display；（b）Schematic diagram of electrowetting on a convex surface^［6］；（c）Schematic diagram of electrowetting on a concave surface^［6］.

Fig. 2. Structure and principle of electrowetting display.（a）Device switching state；（b）Structure of electrowetting display device.

Fig. 3. （a）Schematic diagram of electrowetting preparation process for rigid substrate；（b）Schematic diagram of electrowetting preparation process for flexible substrate.

Fig. 4. （a）Electrowetting effect on bent paper substrate^［23］；（b）Electrowetting effect on bent ultrathin glass substrate^［27］；（c）PET substrate flexible electrowetting monitor OFF state vs. ON state at 20 V^［26］.

Fig. 5. Flexible electrowetting device with support column^［16］.（a）Schematic diagram of device structure；（b）Flexible electrowetting display device with a curvature of 0.25 cm^-1；（c）Video playback of the flexible electrowetting device；（d）Video playback of the flexible electrowetting device when bent.

Fig. 6. （a）Schematic diagram of normal photoresist patterning process flow；（b）Schematic diagram of fluorosurfactant-containing photoresist patterning process flow.

Fig. 7. （a）Response time versus bending curvature curves at different voltages^［16］；（b）Capacitance versus voltage curves for different bending radii^［31］；（c）Leakage current versus voltage for different bending radii^［31］.

Fig. 8. （a）Schematic diagram of single-layer dielectric layer structure and two-layer dielectric layer structure；（b）Leakage current vs.voltage for different number of bends of single-layer dielectric layer^［33］；（c）Leakage current vs.voltage for different number of bends of two-layer dielectric layer^［33］；（d）Capacitance vs.voltage curves after different number of bends^［31］；（e）Leakage current vs.voltage curves after different number of bends^［31］.