US 12,405,467 B2
Optical displaying system, displaying device and method for controlling optical displaying system
Chenru Wang, Beijing (CN); Ruijun Dong, Beijing (CN); Yali Liu, Beijing (CN); Ke Li, Beijing (CN); Yulong Wu, Beijing (CN); Feng Qu, Beijing (CN); Hao Zhang, Beijing (CN); and Lili Chen, Beijing (CN)
Assigned to Beijing BOE Optoelectronics Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/627,079
Filed by Beijing BOE Optoelectronics Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Mar. 9, 2021, PCT No. PCT/CN2021/079762
§ 371(c)(1), (2) Date Jan. 13, 2022,
PCT Pub. No. WO2021/218402, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 202010340265.1 (CN), filed on Apr. 26, 2020.
Prior Publication US 2022/0397767 A1, Dec. 15, 2022
Int. Cl. G02B 27/01 (2006.01); G02B 27/28 (2006.01)
CPC G02B 27/0172 (2013.01) [G02B 27/0101 (2013.01); G02B 27/017 (2013.01); G02B 27/0176 (2013.01); G02B 27/283 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An optical displaying system, wherein the optical displaying system comprises:
a display screen;
a first light splitting unit, disposed at a displaying side of the display screen, wherein after a light ray emitted by the display screen passes through the first light splitting unit, the light ray is converted into a first-type polarized light or a second-type polarized light; wherein the first light splitting unit comprises a polarizer;
an imaging unit, disposed at a light exiting side of the first light splitting unit, wherein after a light ray exiting from the first light splitting unit passes through the imaging unit, the light ray forms an enlarged image corresponding to a first focal length; wherein the imaging unit comprises at least one lens;
a second light splitting unit, disposed at a light exiting side of the imaging unit, and configured to transmit the first-type polarized light and reflect the second-type polarized light; wherein the second light splitting unit comprises a polarization beam splitting prism;
a first optical-path unit, wherein after the first-type polarized light transmitted out of the second light splitting unit passes through the first optical-path unit, the first-type polarized light forms an enlarged image corresponding to a second focal length, and is converted into the second-type polarized light, and is then reflected to an observation position by the second light splitting unit; wherein the first optical-path unit comprises at least a quarter-wave plate; and
a second optical-path unit, wherein after the second-type polarized light reflected out of the second light splitting unit passes through the second optical-path unit, the second-type polarized light is the enlarged image corresponding to the first focal length or forms an enlarged image corresponding to a third focal length, the second-type polarized light is converted into the first-type polarized light, and is then transmitted to the observation position by the second light splitting unit; wherein the second optical-path unit comprises at least a quarter-wave plate; wherein the first focal length, the second focal length, and the third focal length are all different;
wherein the polarizer clings to a display surface of the display screen, and the polarizer comprises a plurality of first-type polarizers and a plurality of second-type polarizers that are arranged separately; wherein at a first time period, a first focal-plane-image signal is inputted into pixels in the display screen that correspond to the plurality of first-type polarizers, the plurality of second-type polarizers are removed manually or electrically, so that the light ray emitted by the display screen is converted into the first-type polarized light after passing through the first-type polarizer, and pixels corresponding to the plurality of second-type polarizers are not inputted a signal; at a second time period, a second focal-plane-image signal is inputted into pixels in the display screen that correspond to the plurality of second-type polarizers, the plurality of first-type polarizers are removed manually or electrically, so that the light ray emitted by the display screen is converted into the second-type polarized light after passing through the second-type polarizer, and the pixels corresponding to the plurality of first-type polarizers are not inputted a signal.