scholarly journals Photocontrollable Resistivity Change in Nanoparticle-Doped Liquid Crystal Alignment Layer: Voltage Holding and Discharging Properties of Fringe-Field Switching Liquid Crystal Modes

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 268
Author(s):  
Jeong-Hoon Ko ◽  
Jun-Chan Choi ◽  
Dong-Jin Lee ◽  
Jae-Won Lee ◽  
Hak-Rin Kim

In liquid crystal (LC) displays, deriving an optimum resistance level of an LC alignment polyimide (PI) layer is important because of the trade-off between the voltage holding and surface-discharging properties. In particular, to apply a power-saving low-frequency operation scheme to fringe-field switching (FFS) LC modes with negative dielectric LC (n-LC), delicate material engineering is required to avoid surface-charge-dependent image flickering and sticking problems, which severely degrade with lowering operation frequency. Therefore, this paper proposes a photocontrolled variable-resistivity PI layer in order to systematically investigate the voltage holding and discharging properties of the FFS n-LC modes, according to the PI resistivity (ρ) levels. By doping fullerene into the high-ρ PI as the photoexcited charge-generating nanoparticles, the ρ levels of the PI were continuously controllable with a wide tunable range (0.95 × 1015 Ω∙cm to 5.36 × 1013 Ω∙cm) through Ar laser irradiation under the same LC and LC alignment conditions. The frequency-dependent voltage holding and discharge behaviors were analyzed with photocontrolled ρ variation. Thus, the proposed experimental scheme is a feasible approach in PI engineering for a power-saving low-frequency FFS n-LC mode without the image flickering and image sticking issues.

2006 ◽  
Vol 45 (2A) ◽  
pp. 903-905 ◽  
Author(s):  
Jae Geon You ◽  
Sung Ju Kim ◽  
Jin Seog Gwag ◽  
Hyun Kyung Lee ◽  
Dae Kyu Lee ◽  
...  

2021 ◽  
Vol 23 (9) ◽  
pp. 2170032
Author(s):  
Jun-Chan Choi ◽  
Jae-Won Lee ◽  
Dong-Jin Lee ◽  
YungKyung Park ◽  
Hak-Rin Kim

2015 ◽  
Vol 30 (5) ◽  
pp. 757-762
Author(s):  
刘露露 LIU Lu-lu ◽  
刘 明 LIU Ming ◽  
龚世铭 GONG Shi-ming ◽  
汪映寒 WANG Ying-han

2016 ◽  
Vol 47 (1) ◽  
pp. 1610-1613 ◽  
Author(s):  
Han Sol Choi ◽  
Jin Hyun Kim ◽  
Hyeong Gyun Ham ◽  
Young Jin Lim ◽  
Jae Myeong Lee ◽  
...  

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 11119-11126 ◽  
Author(s):  
Faqin Tong ◽  
Shuangshuang Chen ◽  
Zhao Chen ◽  
Xuemin Lu ◽  
Qinghua Lu

This work shows the key role played by the mesogens side groups of polyimides in enhancing the azimuthal anchoring energy.


2008 ◽  
Author(s):  
Takeshi Matsumoto ◽  
Yuko Kinoshita ◽  
Masahiro Tanii ◽  
Junichi Tatemichi ◽  
Masashi Konishi ◽  
...  

2012 ◽  
Vol 25 (10) ◽  
pp. 1408-1414 ◽  
Author(s):  
Soo Sang Chae ◽  
Haesik Min ◽  
Jeong Hun Lee ◽  
Byounghar Hwang ◽  
Woong Mo Sung ◽  
...  

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