Backlight unit including a plurality of LEDs and associated distributed bragg reflectors
US12369434B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2024 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Jul 3, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/855
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display apparatus includes a liquid crystal panel; and a backlight unit configured to provide light to the liquid crystal panel, wherein the backlight unit includes: a substrate; and a plurality of light emitting diode groups provided on an upper surface of the substrate, wherein each of the plurality of light emitting diode groups includes a red light emitting diode, a green light emitting diode, and a blue light emitting diode, wherein each of the red light emitting diode, the green light emitting diode, and the blue light emitting diode includes: a light emitting layer; and a distributed Bragg reflector (DBR) provided on the light emitting layer, and wherein reflectivities of the distributed Bragg reflectors of the red light emitting diode, the green light emitting diode, and the blue light emitting diode are within a same range of reflectivity according to an incident angle of light incident on the DBRs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.