Helical photonic crystal-based reflective-type color display and method for manufacturing the same
US10877311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2018 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Dec 21, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/50
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reflective-type color display according to the present disclosure includes a lower substrate and an upper substrate, a polarization plate positioned on an outer surface of the upper substrate, a plurality of helical photonic crystals arranged between the lower substrate and the upper substrate and having different reflection properties of light in the visible region, and a tunable wave plate positioned on the plurality of helical photonic crystals to control the reflection intensity by continuously changing the phase retardation. According to an embodiment, it is possible to simultaneously achieve the features of three primary colors, analog grey levels, high resolution, and fast response through the separation of the function of color reflection from the intensity tuning capability of the photonic crystal, beyond the limitation of existing reflective-type display technology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.