US 12,237,869 B2
Optical communication transmitting device, optical communication receiving device, method and system
Kairan Liu, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/636,155
Filed by Beijing BOE Technology Development Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Mar. 16, 2021, PCT No. PCT/CN2021/081075
§ 371(c)(1), (2) Date Feb. 17, 2022,
PCT Pub. No. WO2021/185246, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 202010188295.5 (CN), filed on Mar. 17, 2020.
Prior Publication US 2022/0294532 A1, Sep. 15, 2022
Int. Cl. H04B 10/50 (2013.01); H04B 10/116 (2013.01)
CPC H04B 10/502 (2013.01) [H04B 10/116 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An optical communication transmitting device, comprising: a light-emitting display screen, a liquid crystal panel, and a control circuit;
the liquid crystal panel is located at a light emission side of the light-emitting display screen;
the control circuit is configured to generate, according to a presetting encoding rule, a driving voltage that controls liquid crystal molecules of the liquid crystal panel to be twisted, and the presetting encoding rule is related to a target deflection angle,
wherein a polarized light beam emitted from the light-emitting display screen passes through the liquid crystal panel driven by the driving voltage, and then is deflected according to the target deflection angle, and then is transmitted to an optical communication receiving device,
wherein the liquid crystal panel comprises at least one encoding region, and the encoding region corresponds to one or more pixels of the light-emitting display screen,
wherein polarization directions of the polarized light beams emitted respectively by one or more pixels of the light-emitting display screen are same, the one or more pixels of the light-emitting display screen correspond to the encoding region;
when there are more than two encoding regions, the polarization directions of the polarized light beams emitted respectively by the one or more pixels of the light-emitting display screen corresponding to any one of the encoding regions are independent of the polarization directions of the polarized light beams emitted respectively by the one or more pixels of the light-emitting display screen corresponding to any other one of the encoding regions, and the control circuit is configured to control the driving voltages of the liquid crystals in the encoding regions.