US 12,443,084 B2
Liquid-crystal display
Chia-Sheng Hsieh, Taipei (TW); I-Hua Huang, Taipei (TW); and Cheng-Jui Lin, Taipei (TW)
Assigned to Merck Patent GmbH, (DE)
Appl. No. 18/720,222
Filed by MERCK PATENT GmbH, Darmstadt (DE)
PCT Filed Dec. 14, 2022, PCT No. PCT/EP2022/085753
§ 371(c)(1), (2) Date Jun. 14, 2024,
PCT Pub. No. WO2023/110962, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 21215397 (EP), filed on Dec. 17, 2021.
Prior Publication US 2025/0068023 A1, Feb. 27, 2025
Int. Cl. G02F 1/137 (2006.01); G02F 1/1333 (2006.01); G02F 1/1337 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/13775 (2021.01) [G02F 1/133354 (2021.01); G02F 1/1337 (2013.01); G02F 1/134345 (2021.01); G02F 1/13712 (2021.01)] 11 Claims
OG exemplary drawing
 
1. An LC display of the chiral polymer-stabilized vertically aligned (C-PSVA) mode comprising, in the following sequence:
a) a first substrate, being equipped with a first electrode, said first electrode optionally having a pattern and optionally being divided into multiple pixels,
b) a layer comprising a nematic LC medium having negative dielectric anisotropy and a permanently fixed pretilt and multidomain alignment, containing a chiral additive, and further comprising a polymer formed by one or more polymerizable compounds,
c) a second substrate being equipped with a second electrode, said second electrode having a fishbone pattern and being divided into multiple pixels, and
d) optionally a colour filter,
wherein the second substrate is further equipped with a third electrode and an electrically isolating layer between the second and third electrodes, said third electrode being a continuous electrode or having a patterned structure corresponding to individual pixels,
wherein the display further comprises non-linear elements for electronically addressing the individual pixels, said non-linear elements contacting the second and/or third electrode or contacting the first electrode, and
wherein, after the LC medium has been dispensed between the two substrates and a voltage has been applied to the first and second electrodes while the third electrode is grounded, the said one or more polymerizable compounds in the LC medium have been polymerized in situ to create the permanently fixed pretilt and multidomain alignment while applying a voltage to the first, second, and third electrodes, wherein the third electrode is switched to the same potential as the second electrode.