Light path control element, backlight unit and display device
US11460732B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2020 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Jan 1, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/40
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Embodiments of the present disclosure relates to a light path control element, a backlight unit and a display device, and by disposing, over one or more light sources, a light path control element including a first engraved patterns located on a surface through which light exits and located to correspond to respective light sources, and a second engraved patterns located on a surface into which light is incident and located in an areas between light sources, it is possible to improve functions of guiding and diffusing light emitted from the light sources. Accordingly, by increasing a distance between light sources and enabling a hot spot to be prevented and luminance uniformity to improve, it is possible to reduce the number of light sources and provide a backlight unit producing improved image quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.