Light emitting device, backlight unit and display apparatus
US11257991B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2020 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Feb 9, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/854
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A light emitting device includes a first LED chip to emit a light having a peak wavelength in a range of 410 to 430 nm, a second LED chip to emit a light having a peak wavelength in a range of 440 to 460 nm, a first quantum dot to convert light emitted by the first and second LED chips into light having a peak wavelength in a range of 510 to 550 nm, and a second quantum dot to convert light emitted by the first and second LED chips into light having a peak wavelength in a range of 610 to 660 nm, wherein, in an emission spectrum of final light, intensity of a peak wavelength of the first LED chip is 15% or less of intensity of a peak wavelength of the second LED chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.