Method and a device for reducing hysteresis or imprinting in a movable micro-element
US6885493B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2002 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Jan 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0841
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a movable micro-element with reduced imprinting or hysteresis effect arranged spaced apart from a surface comprising at least one electrode. At least one restoring element is connected to said movable micro-element. An address electrode is arranged on said surface and capable to electrostatically attract said movable micro-element. Said address electrode is addressed to a first potential. Said movable micro-element is first set to a second potential defining a non addressed state and at a time period Δt before a predetermined pulsed signal is emitted said movable micro-element is switched from said second potential to a third potential defining an addressed state. Said movable micro-element is kept in said addressed state for a time period of Δt+Δt′. The invention also relates to a Spatial Light Modulator (SLM), an apparatus for patterning a workpiece and a method of reducing an imprinting or hysteresis effect of a movable micro-element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.