An electrically switchable dye-doped liquid crystal polarizer for organic light emitting-diode displays

Hybrid-Aligned Liquid Crystal Polymers Adhered to the Polarizing Film or Doped with Dichroic Dye for Display Privacy Protection

“…It is worth mentioning that, as far as we know, both LCD screens and most OLED screens emit linearly polarized light (LPL) because they contain polarizers inside them. 6,16 Leveraging this characteristic, preparing thin films of anisotropic materials with angle-dependent transmittance for LPL could be an appealing idea. In recent years, liquid crystals (LCs) and polymer dispersed LCs (PDLCs) units with hybrid alignment have shown promising applications in various fields, such as smart windows and displays, thanks to their optical anisotropy induced by special orientation.…”

“…Therefore, by utilizing the polarizer inside the display panel, it is possible to release one of the polarizers in this sandwich-like structure and efficiently make use of the backlight of the screen. In addition, dichroic dyes can absorb polarized light vibrating parallel to the molecular axis and transmit polarized light vibrating perpendicular to the molecular axis. − In recent years, dichroic dyes have been widely utilized in polarizer-free LC display devices ,− and smart windows. − It is obvious that using dichroic dyes is an important method to replace polarizers.…”

“…It is worth mentioning that, as far as we know, both LCD screens and most OLED screens emit linearly polarized light (LPL) because they contain polarizers inside them. , Leveraging this characteristic, preparing thin films of anisotropic materials with angle-dependent transmittance for LPL could be an appealing idea. In recent years, liquid crystals (LCs) and polymer dispersed LCs (PDLCs) units with hybrid alignment have shown promising applications in various fields, such as smart windows and displays, thanks to their optical anisotropy induced by special orientation. − Among these, some research has proposed that a sandwich structure consisting of a small-molecule LC cell with a hybrid arrangement and polarizers can reduce light transmittance at predetermined azimuth and polar angles without affecting the transmission of light in the normal direction.…”

Broadband and Incident-Angle-Modulation Near-Infrared Polarizers Based on Optically Anisotropic SnSe

“…Furthermore, once all the three kinds of polarizers have been produced, it is scarcely possible to dynamically and reversibly modulate their performance. Although polarizers made by liquid crystal can be tuned by external voltage to dynamically and reversibly regulate the polarization state [ 34 , 35 ], there still remain the tough problems of extra energy consumption and low modulating efficiency. Therefore, it is challenging to design low-cost and broadband polarizers with long-term stability and to efficiently and dynamically modulate their performance without extra energy consumption.…”

Electrical and Optical Properties of TPBi and CzSi Films Fabricated by Spin Coating: The Effects of Varying Thickness and Applied Rapid Thermal Annealing

“…With the increasing need for light systems in daily life, OLED devices such mobile device, display in TV, bio sensor for DNA have attracted the attention of researchers and high technology companies due to their cheapness, efficiency and flexibility (Wu et al, 2021;Won et al, 2021;Das et al, 2021;Daniso et al, 2021;Ren et al, 2021;Nabha-Barnea et al, 2021;Wang et al, 2021;Chansin et al, 2021;Asnani et al, 2021;Shih et al, 2021). To produce successful OLED devices, five layers have been needed and these layers are as follows: the bottom part is the substrate part, then the hole transfer part, the emissive part, the electron transfer part, and on the top is the cathode part.…”