Method and system for writing data to MEMS display elements

摘要

Charge balanced display data writing methods use write and hold cycles of opposite polarity during selected frame update periods. The transitions between voltages of opposite polarity are sufficiently brief that the display elements do not change state. A release cycle may be provided to reduce the chance that a given display element will become stuck in an actuated state.

主权项

1. A method of actuating an electromechanical display element, the display element comprising a portion of an array of display elements, the method comprising:
writing display data to the display element with a potential difference of a first polarity during a first portion of a display write process;applying a first bias potential to the display element during a second portion of the display write process, the first bias potential causing a first potential difference across the display element with the first polarity; and transitioning the potential applied to the display element from the first bias potential to apply a second bias potential polarity to the electromechanical display element during a third portion of the display write process, the second bias potential causing a second potential difference across the display element with a second polarity opposite the first polarity,
wherein a transition time between applying the first bias potential and applying the second bias potential is configured such that the display element does not change states as a result of transitioning the voltage from the first bias potential to the second bias potential; and wherein a transition time between the bias potentials is less than or equal to “τiMoD+“τRC, wherein “τiMoD comprises a constant of the electromechanical display element determined with reference to physical characteristics of the electromechanical display element and wherein τRC comprises a constant related to electrical characteristics of the electromechanical display element.