US 11,672,171 B2
Light-emitting device including a plurality of organic electroluminescent elements
Norifumi Kajimoto, Zama (JP); Tetsuo Takahashi, Kawasaki (JP); Koji Ishizuya, Kawasaki (JP); Itaru Takaya, Atsugi (JP); Hirokazu Miyashita, Ebina (JP); Takayuki Ito, Kawasaki (JP); and Hiroaki Sano, Kawasaki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 15, 2021, as Appl. No. 17/202,020.
Application 17/202,020 is a continuation of application No. 16/162,203, filed on Oct. 16, 2018, granted, now 10,985,323.
Claims priority of application No. JP2017-202820 (JP), filed on Oct. 19, 2017; and application No. JP2018-164460 (JP), filed on Sep. 3, 2018.
Prior Publication US 2021/0202848 A1, Jul. 1, 2021
Int. Cl. H10K 85/60 (2023.01); H10K 50/13 (2023.01); H10K 50/17 (2023.01); H10K 50/818 (2023.01); H10K 50/18 (2023.01); H10K 50/82 (2023.01); H10K 50/852 (2023.01); H10K 50/15 (2023.01); H10K 59/30 (2023.01); H10K 39/32 (2023.01); C07C 211/01 (2006.01); C07C 211/43 (2006.01); C07C 211/00 (2006.01); C07C 211/33 (2006.01); H10K 59/38 (2023.01); H10K 50/16 (2023.01); H01L 27/146 (2006.01); H10K 102/00 (2023.01); H01L 51/00 (2006.01); H01L 51/50 (2006.01); H01L 51/52 (2006.01); H01L 27/32 (2006.01); H01L 27/30 (2006.01)
CPC H01L 51/006 (2013.01) [C07C 211/00 (2013.01); C07C 211/01 (2013.01); C07C 211/33 (2013.01); C07C 211/43 (2013.01); H01L 27/307 (2013.01); H01L 27/3206 (2013.01); H01L 51/0061 (2013.01); H01L 51/504 (2013.01); H01L 51/5064 (2013.01); H01L 51/5088 (2013.01); H01L 51/5096 (2013.01); H01L 51/5218 (2013.01); H01L 51/5221 (2013.01); H01L 51/5265 (2013.01); H01L 27/14612 (2013.01); H01L 27/322 (2013.01); H01L 51/0054 (2013.01); H01L 51/0055 (2013.01); H01L 51/0056 (2013.01); H01L 51/0058 (2013.01); H01L 51/0059 (2013.01); H01L 51/0072 (2013.01); H01L 51/5056 (2013.01); H01L 51/5072 (2013.01); H01L 2251/5315 (2013.01); H01L 2251/558 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a reflection electrode;
a hole transport region;
a first luminescent layer being of an electron trapping type; and
a light extraction electrode, in this order,
wherein the hole transport region of the light-emitting device and a hole transport layer of another light-emitting device are disposed continuously;
wherein the first luminescent layer includes a first surface and a second surface closer to the light extraction electrode than the first surface, and
wherein a distance between the reflection electrode and the second surface of the first luminescent layer is equivalent to a length enabling emission from the first luminescent layer to be enhanced.