Display device and light emitting device
US12356790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2022 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | Jan 16, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/101
Abstract
An electroluminescent display device and a light emitting device including a blue light emitting layer include a first electrode, a second electrode, and a light emitting layer between the first electrode and the second electrode. The light emitting layer includes a blue light emitting layer including a plurality of nanostructures, the plurality of nanostructures does not include cadmium. On an application of a bias voltage, the blue light emitting layer is configured to emit light of an emission peak wavelength (λmax) in a range of greater than or equal to about 445 nm and less than or equal to about 480 nm. During a bias voltage change from a first voltage to a second voltage, the second voltage being greater than the first voltage by at least about 5 volts, the emission peak wavelength (λmax) of the blue light emitting layer may exhibit a first emission peak wavelength (a 1st λmax wavelength) that is less than an emission peak wavelength at the first voltage (λmax@first voltage) and an emission peak wavelength at the second voltage (λmax@second voltage), and during the bias voltage change, a change width in emission peak wavelength (λmax) is less than or equal to about 4 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.