US 12,356,840 B2
Display device
Sungwoo Kim, Seoul (KR); Hoon Kang, Goyang-si (KR); and Keongjin Lee, Seoul (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Sep. 3, 2021, as Appl. No. 17/467,102.
Claims priority of application No. 10-2020-0189158 (KR), filed on Dec. 31, 2020.
Prior Publication US 2022/0208877 A1, Jun. 30, 2022
Int. Cl. H10K 59/80 (2023.01); H10K 50/854 (2023.01); H10K 50/858 (2023.01); H10K 59/35 (2023.01)
CPC H10K 59/879 (2023.02) [H10K 50/854 (2023.02); H10K 50/858 (2023.02); H10K 59/353 (2023.02); H10K 59/877 (2023.02)] 7 Claims
OG exemplary drawing
 
1. A display device comprising:
a display panel including a plurality of sub-pixel areas for respectively outputting light for displaying an image; and
a light travel-direction changing layer disposed on the display panel for diversifying and spreading travel directions of the light emitted from each of the plurality of sub-pixel areas,
wherein the display panel includes:
a support substrate;
a transistor array disposed on the support substrate;
a light-emitting array disposed on the transistor array; and
an encapsulation film disposed on the light-emitting array,
wherein the light travel-direction changing layer includes:
a plurality of refractive patterns disposed on the encapsulation film respectively corresponding to the plurality of sub-pixel areas and arranged in a matrix form, the plurality of refractive patterns being spaced apart from each other on the encapsulation film; and
a light-scattering layer disposed around each of the plurality of refractive patterns and having a refractive index different from a refractive index of each of the plurality of refractive patterns,
wherein the light-scattering layer includes a transparent resin material and particles dispersed in the transparent resin material, the light-scattering layer disposed between adjacent refractive patterns,
wherein the particles encounter the light refracted at a boundary between the refractive pattern and the light-scattering layer and scatter the light refracted in diversifying travel direction; and
wherein the transparent resin material is in direct contact with an outer surface of the refractive patterns and with the encapsulation film between adjacent refractive patterns,
wherein each refractive pattern includes a light incident face and a light-emission face opposite to the light incident face,
wherein each refractive pattern is configured in a column shape in which the light incident face and the light-emission face are parallel to each other,
wherein each refractive pattern includes side faces between the light incident face and the light-emission face, the side faces including a first side face and a second side face opposite to the first side face,
wherein the first side face is formed as a plane perpendicular to the light incident face, causing the light emitted through the first side face from the light incident face to be refracted at an angle adjacent to the light-emission face,
wherein the second side face is formed as an inclined face with respect to the light incident face, causing the light emitted through the second side face from the light incident face to be refracted at an angle away from the light-emission face, and
wherein the first side face of one refraction pattern is disposed facing the second side face of an adjacent refraction pattern.