Display device comprising an illumination device having a light diffusion layer exhibiting a first diffusion degree in a first direction which is different than a second diffusion degree in a second direction
US11249343B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2021 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Feb 22, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0068
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display device is provided and includes display panel; and illumination device opposed to display panel, illumination device including first light guide, second light guide arranged adjacent to first light guide in first direction, third light guide arranged adjacent to first light guide in second direction intersecting first direction, and fourth light guide arranged adjacent to second light guide in the second direction, light diffusion layer disposed between display panel and each of the first, second, third, and fourth light guides, wherein light diffusion layer exhibit first diffusion degree in first direction and second diffusion degree in second direction, second diffusion degree is different from the first diffusion degree, illumination device includes first ridge between first and second light guides and second ridge between first and third light guides, and under light diffusion layer, first brightness in first ridge is different from second brightness in second ridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.