Optical unit and display device having the same
US10401677B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2017 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Mar 15, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/046
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present disclosure relates to a display device including a display panel on which an image is displayed, a polarizer disposed on the display panel, a lower fluorescent filter disposed on the polarizer, and an upper fluorescent filter disposed on the lower fluorescent filter. The present disclosure may improve visibility when an image is displayed on the display device and light of a laser pointer in a visible light region is emitted thereto by absorbing the light using the upper and lower fluorescent filters, converting the light into light in a long wavelength band, which is a higher wavelength band than that of the absorbed light, and emitting the light in the long wavelength band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.