US 12,147,139 B2
Display device having wide viewing angle in sharing mode
Qian Deng, Hubei (CN); and Wei Cheng, Hubei (CN)
Assigned to WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Hubei (CN)
Appl. No. 17/623,496
Filed by WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Hubei (CN)
PCT Filed Dec. 20, 2021, PCT No. PCT/CN2021/139780
§ 371(c)(1), (2) Date Dec. 28, 2021,
PCT Pub. No. WO2023/108689, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 202111526063.7 (CN), filed on Dec. 14, 2021.
Prior Publication US 2023/0185145 A1, Jun. 15, 2023
Int. Cl. G02F 1/137 (2006.01); G02F 1/13 (2006.01); G02F 1/1343 (2006.01); G02F 1/1335 (2006.01)
CPC G02F 1/137 (2013.01) [G02F 1/1323 (2013.01); G02F 1/134309 (2013.01); G02F 1/133553 (2013.01); G02F 2203/22 (2013.01); G02F 2203/48 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display device, wherein the display device comprises a diffraction panel and a display panel, wherein the diffraction panel is located on a light incident side of the display panel, and the diffraction panel comprises:
a first substrate;
a second substrate disposed opposite to the first substrate;
a plurality of first optical units disposed between the first substrate and the second substrate; and
a plurality of second optical units disposed between the first substrate and the second substrate and disposed alternately with the plurality of first optical units in a direction perpendicular to a thickness direction of the diffraction panel;
wherein a transmittance of the first optical units to light is less than a transmittance of the second optical units to light when the display device is in a first display mode, and
when the display device is in a second display mode, the transmittance of the first optical units to light is equal to the transmittance of the second optical units to light, and a visual viewing angle in second display mode is less than a visual viewing angle in the first display mode;
wherein the first optical units comprise a plurality of liquid crystal molecules and optical elements, and the second optical units comprise a plurality of the liquid crystal molecules,
when the display device is in the first display mode, a long axis of the plurality of the liquid crystal molecules in the first optical units is disposed in a first direction, and a refractive index of the plurality of liquid crystal molecules in the first optical units in the thickness direction of the diffraction panel is different from a refractive index of the optical elements, and a long axis of the plurality of liquid crystal molecules in the second optical units is disposed in the first direction, or
each of the first optical units comprises a plurality of liquid crystal molecules and at least one optical element, and each of the second optical units comprises a plurality of liquid crystal molecules and at least one optical element,
when the display device is in the first display mode, a long axis of the plurality of liquid crystal molecules in the first optical units is disposed in a first direction, a refractive index of the plurality of liquid crystal molecules in the first optical units in the thickness direction of the diffraction panel is different from a refractive index of the optical elements in the first optical units, a long axis of the plurality of liquid crystal molecules in the second optical units is disposed in a second direction, a refractive index of the plurality of liquid crystal molecules in the second optical units in the thickness direction of the diffraction panel is same as a refractive index of the optical elements in the second optical units, and the second direction is different from the first direction.