Importance

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Abstract

A device is described that comprises a layer of material (254) disposed between first and second cell walls (250,252) and is capable of adopting, and being electrically latched between, at least two stable configurations. The layer of material (254) comprises one or more separate electrically addressable regions (270, 272, 274, 276) and addressing means are provided to write to each of said electrically addressable regions using voltage pulses to selectively latch said layer of material as required. The addressing means is arranged to write to each of said one or more separate electrically addressable region using at least first and second latching scans. The first latching scan being arranged to selectively latch material having a latching threshold within a first range and said second latching scan being arranged to selectively latch material having a latching threshold within a second range, wherein said first latching scan is applied prior to application of said second latching scan and said second latching scan is insufficient to latch material having a latching threshold within said first range. A method for addressing a device is also disclosed.

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First Claim