Monolithic multicolor direct view display containing different color LEDs and method of making thereof
US9978808B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2017 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | May 3, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8512
Abstract
A direct view multicolor light emitting device includes blue, green and red light emitting diodes (LEDs) in each pixel. The different light emitting diodes can be formed by depositing different types of active region layers in a stack such that deposition area of each subsequent active region is less than the deposition area of any preceding active region, and by patterning the active region layers into different types of stacks. The active region layers may be formed as planar layers, or may be formed on semiconductor nanowires. The active region layers can emit light at the respective target wavelength range. Alternatively, at least one of green and red phosphor materials, dye materials, or quantum dots may be used instead of or in addition to the active regions that emit light at a wavelength different from a target wavelength of a respective LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.