US 12,253,769 B2
Micro-nano device, manufacturing method, and display device
Jian Zhou, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 18/026,516
Filed by Beijing BOE Technology Development Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jun. 24, 2022, PCT No. PCT/CN2022/101244
§ 371(c)(1), (2) Date Mar. 15, 2023,
PCT Pub. No. WO2023/245653, PCT Pub. Date Dec. 28, 2023.
Prior Publication US 2024/0295781 A1, Sep. 5, 2024
Int. Cl. G02F 1/135 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/1351 (2021.01) [G02F 1/134309 (2013.01); G02F 1/13439 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display device, comprising: a display panel, and a micro-nano device located on a side of a light emergent surface of the display panel, wherein the micro-nano device comprises: a micro-nano structural cell; wherein
the display panel comprises a plurality of pixel units, wherein the pixel units are in one-to-one correspondence with first electrodes in the micro-nano device, and the pixel units are in one-to-one correspondence with second electrodes in the micro-nano device;
light is emitted from the pixel units to the micro-nano structural cell; and
in response to the light being a one-dimensional beam, a working principle of the micro-nano structural cell is shown by a following formula:
Aref=e−ikz
Aobj=e−ikxi sin θ
A=Aobj·A*ref,z=0=Aobj=−ikxi sin θ
Sample=Re(A)=|cos(kxi sin θ)|
wherein Aref is a reference beam; Aobj is a target beam; θ is a pitch angle of beam target pointing; z is a height of a z axis; xi is a position in the x-axis direction corresponding to each pixel unit, and i is a positive integer; k=2π/λ, k being a wave vector in the air; and sample is a sample function; and
the micro-nano structural cell comprises:
a substrate provided with a light incident surface and a light emergent surface which are oppositely disposed;
a first electrode layer located on a side of the light emergent surface of the substrate, wherein the first electrode layer comprises the first electrodes;
a second electrode layer located on a side, facing away from the substrate, of the first electrode layer, wherein the second electrode layer comprises the second electrodes disposed in one-to-one correspondence with the first electrodes, the overlapping regions the first electrodes with the second electrodes on the display panel correspondingly form a plurality of light control regions, and the pixel units are located within the light control regions;
a tunable dielectric layer located between the first electrode layer and the second electrode layer; wherein an absorption resonance frequency of the tunable dielectric layer is changed under a drive of an electric field between the first electrodes and the second electrodes to change a transmission intensity of light in the micro-nano structural cell; and
an absorbing layer located on aside, facing away from the tunable dielectric layer, of the second electrode layer; wherein the absorbing layer selectively absorbs light in different regions within the plurality of light control regions to change a direction of light passing through the micro-nano structural cell.