US 12,292,646 B2
Light modulation device having high light efficiency
Norbert Leister, Dresden Sachsen (DE); and Bo Kroll, London (GB)
Assigned to SEEREAL TECHNOLOGIES S.A., Munsbach (LU)
Appl. No. 17/787,495
Filed by SEEREAL TECHNOLOGIES S.A., Munsbach (LU)
PCT Filed Dec. 17, 2020, PCT No. PCT/EP2020/086762
§ 371(c)(1), (2) Date Jun. 20, 2022,
PCT Pub. No. WO2021/122988, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19219151 (EP), filed on Dec. 20, 2019.
Prior Publication US 2023/0024541 A1, Jan. 26, 2023
Int. Cl. G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02F 1/1337 (2006.01); G02F 1/1347 (2006.01); G02F 1/1362 (2006.01); G03H 1/22 (2006.01)
CPC G02F 1/133555 (2013.01) [G02F 1/133553 (2013.01); G02F 1/133638 (2021.01); G02F 1/133757 (2021.01); G02F 1/13471 (2013.01); G02F 1/136286 (2013.01); G03H 1/2294 (2013.01); G02F 1/133512 (2013.01); G02F 1/133514 (2013.01); G02F 1/133526 (2013.01); G02F 1/133536 (2013.01); G02F 1/133548 (2021.01); G02F 2201/40 (2013.01); G03H 2225/33 (2013.01)] 31 Claims
OG exemplary drawing
 
1. A light modulation device, comprising
pixels, substantially one half of the pixels being designed as reflective and the other half of the pixels as transmissive and the reflective pixels being arranged in alternation with the transmissive pixels in a same substrate plane,
a backplane comprising transistors and data lines for conducting signals to the pixels, each pixel being assigned at least one transistor and at least two data lines, the transistors and the data lines of each mutually adjacent pair composed of a reflective pixel and a transmissive pixel being arranged under the reflective pixel,
two polarizers are provided, one polarizer being arranged in a region of a light entrance plane of the light modulation device and the other polarizer being arranged in a region of a light exit plane of the light modulation device,
the polarizer provided in the region of the light entrance plane of the light modulation device is configured as transmissive for one defined polarization and as reflective for another defined polarization, and
a distance between the polarizer provided in the region of the light entrance plane of the light modulation device and mirror elements of a mirror system in a reflection plane is set to a same value as a thickness of at least one substrate between the mirror elements of the mirror system and an addressable transmissive layer with the pixels.