US 12,302,732 B2
Color filter structure using quantum dots and display device
Kyungkook Jang, Goyang-si (KR); Seungryong Lee, Paju-si (KR); Wonrae Kim, Paju-si (KR); Seungcheol You, Seoul (KR); and Dabin Kim, Changwon-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Nov. 3, 2021, as Appl. No. 17/518,147.
Claims priority of application No. 10-2020-0178478 (KR), filed on Dec. 18, 2020.
Prior Publication US 2022/0199692 A1, Jun. 23, 2022
Int. Cl. H10K 59/38 (2023.01); C09K 11/88 (2006.01); G02B 5/20 (2006.01); H01L 27/15 (2006.01); H01L 33/50 (2010.01); H10K 50/854 (2023.01); H10K 59/12 (2023.01)
CPC H10K 59/38 (2023.02) [C09K 11/883 (2013.01); G02B 5/201 (2013.01); H01L 27/156 (2013.01); H01L 33/502 (2013.01); H10K 50/854 (2023.02); H10K 59/12 (2023.02); H01L 2933/0091 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A color filter structure for converting a wavelength of light emitted from a light-emissive element, the color filter structure comprising:
a light-conversion layer containing a first resin, and only quantum dots dispersed in the first resin, wherein each quantum dot has a core/shell structure; and
a light-absorbing layer stacked on the light-conversion layer,
wherein the light-absorbing layer contains a second resin, and semiconductor nano-particles dispersed in the second resin,
wherein the semiconductor nano-particles absorb blue light emitted from the light-emissive element and do not exhibit photoluminescence characteristics, and
wherein each of the semiconductor nano-particles is made of II-VI compound semiconductor ZnSexTe1-x, where x is in a range of 0.72 to 0.9.