US 12,232,357 B2
Display device and display apparatus
Xianqin Meng, Beijing (CN); Xiaochuan Chen, Beijing (CN); Wei Wang, Beijing (CN); Can Wang, Beijing (CN); Weiting Peng, Beijing (CN); Sen Ma, Beijing (CN); and Yishan Tian, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/639,189
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Mar. 24, 2020, PCT No. PCT/CN2020/080982
§ 371(c)(1), (2) Date Feb. 28, 2022,
PCT Pub. No. WO2021/189271, PCT Pub. Date Sep. 30, 2021.
Prior Publication US 2022/0328796 A1, Oct. 13, 2022
Int. Cl. H01L 21/78 (2006.01); H10K 50/856 (2023.01); H10K 50/86 (2023.01); H10K 59/38 (2023.01)
CPC H10K 50/86 (2023.02) [H10K 50/856 (2023.02); H10K 59/38 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A display device, comprising:
a first substrate;
a second substrate opposite to the first substrate;
a light-emitting pixel array between the first substrate and the second substrate;
a reflective plate at a backlight side of the light-emitting pixel array; and
a polarization conversion structure and a polarization filtering structure which are successively arranged at a light emission side of the light-emitting pixel array; wherein the polarization filtering structure is for filtering light emitted from a light-emitting pixel array side to the polarization filtering structure to transmit target polarized light and reflect back non-target deflected light; and
the polarization conversion structure is for converting transmitted circularly polarized light into linearly polarized light, or converting transmitted linearly polarized light into the circularly polarized light;
wherein the polarization filtering structure is a semi-reflecting and semi-transmitting nanowire grid structure, or a semi-reflecting and semi-transmitting photonic crystal nanostructure, or a semi-reflecting and semi-transmitting metamaterial nanostructure; the display device further comprises:
a packaging layer covering the polarization filtering structure;
wherein a refractive index of the packaging layer is smaller than a refractive index of the polarization filtering structure.