US 11,921,383 B2
Liquid crystal display device and method for operating the same
Yong Hae Kim, Daejeon (KR); and Chi-Sun Hwang, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by Electronics and Telecommunications Research Institute, Daejeon (KR)
Filed on Dec. 19, 2022, as Appl. No. 18/084,203.
Claims priority of application No. 10-2022-0027909 (KR), filed on Mar. 4, 2022.
Prior Publication US 2023/0280620 A1, Sep. 7, 2023
Int. Cl. G02F 1/1343 (2006.01); G02F 1/1333 (2006.01); G02F 1/1335 (2006.01)
CPC G02F 1/134345 (2021.01) [G02F 1/133357 (2021.01); G02F 1/133514 (2013.01); G02F 1/13439 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A liquid crystal display device comprising a plurality of pixels,
wherein one pixel of the plurality of pixels comprises a first sub pixel and a second sub pixel, which are adjacent to each other,
wherein the one pixel comprises:
a first substrate;
a first electrode on the first substrate;
metamaterial layers on the first electrode, wherein the metamaterial layers comprise a first metamaterial layer within the first sub pixel and a second metamaterial layer within the second sub pixel;
a liquid crystal layer on the first and second metamaterial layers;
a second electrode on the liquid crystal layer; and
a second substrate on the second electrode,
wherein the first metamaterial layer and the second metamaterial layer comprise metamaterials having properties different from each other, respectively, and
wherein, under a first voltage applied to the first electrode,
the first metamaterial layer is configured to phase-modus a first port on of the liquid crystal layer to a first value.
 
14. A method for operating a liquid crystal display device comprising a plurality of pixels,
wherein one pixel of the plurality of pixels comprises a first sub pixel and a second sub pixel, which are adjacent to each other,
wherein the one pixel comprises:
a first substrate;
a first electrode on the first substrate;
metamaterial layers on the first electrode, wherein the metamaterial layers comprise a first metamaterial layer within the first sub pixel and a second metamaterial layer within the second sub pixel;
a liquid crystal layer on the first and second metamaterial layers;
a second electrode on the liquid crystal layer; and
a second substrate on the second electrode,
wherein the first metamaterial layer and the second metamaterial layer comprise metamaterials having properties different from each other, respectively,
wherein the method for operating comprises:
applying no voltage to the first electrode;
applying a first voltage to phase-modulate a first portion of the liquid crystal layer provided on the first metamaterial layer to a first value and phase-modulate a second portion of the liquid crystal layer provided on the second metamaterial layer to a second value;
applying a second voltage to maintain the first portion of the liquid crystal layer to the first value and phase-modulate the second portion of the liquid crystal layer to the first value;
applying a third voltage to phase-modulate the first portion of the liquid crystal layer to the second value and maintain the second portion of the liquid crystal layer to the first value; and
applying a fourth voltage to maintain the first portion of the liquid crystal layer to the second value and phase-modulate the second portion of the liquid crystal layer to the second value.