Photoluminescent display device and method for manufacturing the same
US10620478B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 2017 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Oct 17, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133562
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photoluminescent display device includes a blue light source and a photoluminescent display panel adjoining the blue light source. The photoluminescent display panel includes a transparent substrate, a color filter structure and a photoluminescent structure. The color filter structure includes a red pixel region, a green pixel region and a blue pixel region arranged adjacent to one another on the transparent substrate. The photoluminescent structure, which is disposed on the color filter structure and is facing toward the blue light source, includes a red light-conversion layer and a green light-conversion layer, wherein the red light-conversion layer is disposed on the green light-conversion layer. With this vertically stacked arrangement of the light-conversion layers, the photoluminescent display device can have higher optical energy utilization efficiency and a wider viewing angle, while being easier to be manufactured by relaxing the specification of accurate pixel-level alignment among the light-conversion layers and the color filter structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.