Reflective electrophoretic displays including photo-luminescent material and color filter arrays
US11656523B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2021 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Dec 25, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optic display is provided that may include a layer of light-transmissive conductive material, a substrate, a layer of an electro-optic medium disposed between the layer of conductive material and the substrate, a color filter array, and a light emitting layer. The electro-optic medium may include a photo-luminescent material that functions as either a down-converter or an up-converter that may be excited by the light received from the light emitting layer. The photo-luminescent material may be excited by radiation having a first wavelength transmitted by a filter within the color filter array and emit radiation having a second wavelength transmitted by the filter. The photo-luminescent material may also be excited by radiation at a wavelength within a first and second range of wavelengths transmitted by two filters within the color filter array and emit radiation at a wavelength within one of the first and second ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.