Driving methods for TIR-based image displays
US11573475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2018 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Nov 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/344
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical states in TIR-based image displays may be modulated by movement of electrophoretically mobile particles into and out of the evanescent wave region at the interface of a high refractive index convex protrusions and a low refractive index medium. The movement of particles into the evanescent wave region may frustrate TIR and form dark states at pixels. Movement of particles out of the evanescent wave region may allow for TIR of incident light to form bright states at pixels. The movement of the particles may be controlled by employing the drive methods of pulse width modulation, voltage modulation or a combination thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.