Inventors:
- Billerica MA, US
Crystal NGUYEN - Bedford MA, US
Amit DELIWALA - Andover MA, US
Kosta LADAVAC - Somerville MA, US
Christopher L. HOOGEBOOM - Burlington MA, US
International Classification:
G02F 1/1685
G02F 1/167
G02F 1/16757
Abstract:
A system for simplified driving of electrophoretic media using a positive and a negative voltage source, where the voltage sources have different magnitudes, and a controller that cycles the top electrode between the two voltage sources and ground while coordinating driving at least two drive electrodes opposed to the top electrode. The resulting system can achieve roughly the same color states as compared to supplying each drive electrode with six independent drive levels and ground. Thus, the system simplifies the required electronics with only marginal loss in color gamut. The system is particularly useful for addressing an electrophoretic medium including four sets of different particles, e.g., wherein three of the particles are colored and subtractive and one of the particles is light-scattering.
