Backlight unit and liquid crystal display device including the same
US11402690B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2019 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | May 22, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133608
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosure relates a direct type backlight unit, and provides a backlight unit capable of reducing the thickness by maintaining necessary and sufficient optical characteristics and reducing the optical distance (OD), and a liquid crystal display apparatus including the same. Provided is a backlight unit including: light source; a diffusion plate provided to diffuse light emitted from the light source; and an optical sheet disposed between the light source and the diffusion plate and having a plurality of protrusions having a pyramidal shape and the plurality of protrusions protrude toward the light source so that light emitted from the light source is incident onto the plurality of protrusions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.