Patent ID: 11934593
Assignee: E INK CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for erasing a magneto-electrophoretic medium including magneto-electrophoretic particles, the method comprising:
applying a magnetic field stimulus to the magneto-electrophoretic medium and simultaneously applying a sub-threshold voltage to the magneto-electrophoretic medium, thereby causing the magneto-electrophoretic medium to switch from a first state to a second state, the sub-threshold voltage being greater than zero but insufficient alone to cause the magneto-electrophoretic medium to switch from the first state to the second state within five seconds, wherein the sub-threshold voltage comprises a first time-varying waveform,
measuring a remnant voltage on the magneto-electrophoretic medium; and if an absolute value of the remnant voltage is higher than 0.3 V, modifying the first time-varying waveform to diminish the remnant voltage on the magneto-electrophoretic medium.