Optical film and back light unit including the same
US11921374B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2022 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Nov 29, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133614
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A backlight unit according to various embodiments of the present invention includes a light source, a color conversion sheet disposed above the light source for converting a color of light emitted from the light source and an optical film disposed on the color conversion sheet. The optical film further comprises a first sheet having a first pattern layer including a plurality of pyramid patterns formed on one side of a first base and a second pattern layer including a different pattern from the plurality of pyramid patterns disposed on the other surface of the first base and a second sheet having a third pattern layer including a plurality of pyramid patterns formed on one side of a second base and a fourth pattern layer corresponding to the second pattern layer formed on the other side of the second base. The second pattern layer and the fourth pattern layer include a plurality of irregular protrusion portions. The first sheet and the second sheet is laminated by an adhesive material disposed between the second pattern layer and the third pattern layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.