US 12,446,432 B2
Display panel, production method thereof, and display device including the same
Yongwook Kim, Suwon-si (KR); Ji-Yeong Kim, Suwon-si (KR); Soo Kyung Kwon, Suwon-si (KR); Eun Joo Jang, Suwon-si (KR); and Sungwoo Hwang, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Dec. 30, 2022, as Appl. No. 18/091,879.
Claims priority of application No. 10-2021-0193409 (KR), filed on Dec. 30, 2021.
Prior Publication US 2023/0217775 A1, Jul. 6, 2023
Int. Cl. H10K 59/38 (2023.01); H10H 20/01 (2025.01); H10H 20/851 (2025.01); H10K 59/12 (2023.01); H10K 59/35 (2023.01); H10K 102/00 (2023.01)
CPC H10K 59/38 (2023.02) [H10K 59/12 (2023.02); H10K 2102/331 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display panel comprising a light emitting panel and a color conversion panel,
wherein the color conversion panel comprises a color conversion layer comprising a plurality of color regions, and a partition wall which defines the plurality of color regions,
the light emitting panel provides incident light to each of the plurality of color regions,
the plurality of color regions comprises a first color region, a second color region, a third color region, and a fourth color region,
the first color region comprises a first composite comprising a first matrix and first semiconductor nanoparticles dispersed in the first matrix,
the first semiconductor nanoparticles convert the incident light into a first light,
the second color region comprises a second composite comprising a second matrix and second semiconductor nanoparticles dispersed in the second matrix,
the second semiconductor nanoparticles convert the incident light into a second light,
the third color region comprises a third composite comprising a third matrix and third semiconductor nanoparticles dispersed in the third matrix,
the third semiconductor nanoparticles convert the incident light into a third light,
the fourth color region emits a fourth light,
the first semiconductor nanoparticles, the second semiconductor nanoparticles, and the third semiconductor nanoparticles do not comprise cadmium, lead, or a combination thereof,
an emission peak wavelength of the first light is greater than or equal to about 600 nm and less than or equal to about 650 nm,
an emission peak wavelength of the second light is greater than or equal to about 500 nm and less than or equal to about 560 nm,
an emission peak wavelength of the third light is greater than about 470 nm and less than about 500 nm,
an emission peak wavelength of the fourth light is greater than or equal to about 440 nm and less than or equal to about 470 nm,
the color conversion layer is configured to emit a predetermined light,
a color of the predetermined light comprises a first region of Cx of about 0.26 to about 0.35 and Cy of about 0.27 to about 0.35 in CIE 1931 color coordinates, and
in an emission spectrum of the predetermined light having a color in the first region, a first area percentage is less than or equal to about 65%, wherein the first area percentage is defined by the following formula: [A/B]×100(%),
wherein
A denotes an area of a region having a wavelength of less than or equal to about 470 nm in the emission spectrum, and
B denotes an area of a region having a wavelength of less than or equal to about 480 nm in the emission spectrum.