The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2025
Filed:
Jun. 28, 2022
Samsung Electronics Co., Ltd., Suwon-si, KR;
Tae Hyung Kim, Seoul, KR;
Heejae Chung, Seoul, KR;
Eun Joo Jang, Suwon-si, KR;
Sujin Park, Seoul, KR;
Yuho Won, Seoul, KR;
SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do, KR;
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 (λ) 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 (λ) of the blue light emitting layer may exhibit a first emission peak wavelength (a 1λwavelength) that is less than an emission peak wavelength at the first voltage (λ@first voltage) and an emission peak wavelength at the second voltage (λ@second voltage), and during the bias voltage change, a change width in emission peak wavelength (λ) is less than or equal to about 4 nm.