A liquid crystal cell with double-side protrusion electrodes for fast response and low-voltage operation

Choi, Tae‐Hoon; Park, Youngjin; Kim, Jung-Wook; Yoon, Tae–Hoon

doi:10.1080/02678292.2015.1116631

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…In order to enhance the optical control ability, thicker LC layers are usually used, but the thicker LC layer will lead to higher driving voltage and slower response time. In response to these problems, some researchers have proposed ideas on electrode structures: e.g., hole-patterned-electrodes, concave-convex electrodes, and trapezoidal electrodes [10][11][12], expecting to reduce the driving voltage of LC lenses. However, some of these lenses are detrimental to image quality due to poor refractive index profiles, or some have complicated manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Achromatic polymer-dispersed liquid crystal lens with diffractive–refractive hybrid structure

Liang

2023

Mater. Res. Express

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The focal length of liquid crystal Fresnel lens is electrically controllable, but the disadvantage is the chromatic aberration is obvious. In this paper, the electrically controlled zoom characteristics of liquid crystal lens and the basic theory of Fresnel lens achromatic are analyzed, and a diffractive–refractive hybrid lens model made of polymer-dispersed liquid-crystal (PDLC) material is proposed. Fresnel liquid crystal lenses and PDLC hybrid lenses are tested with light at R (700.0 nm), G (546.1 nm) and B (435.8 nm) wavelengths, respectively.The simulation results show that the hybrid lens provides a greater range of adjustment of the focus position. After voltage modulation, the measured light with three different wavelengths have the same focal length, which means that the axial chromatic aberration is eliminated. In addition, with the elimination of axial chromatic aberration, the zoom range of the hybrid lens is doubled by further accurately controlling the electrode, which breaks through the limitation that the traditional liquid crystal lens can only work in monochromatic light spectrum.

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Section: Introductionmentioning

confidence: 99%

Achromatic polymer-dispersed liquid crystal lens with diffractive–refractive hybrid structure

Liang

2023

Mater. Res. Express

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“…Recently, rapid growth of the digital signage and vehicular display markets has caused short response times to become an essential requirement for LCD devices to operate well under all possible ambient conditions, especially in low temperature environments. To reduce the response time of an FFS cell, various methods have been proposed678910111213141516. However, these methods all have drawbacks, such as complicated drive schemes, low transmittance, high operating voltage, and low image quality resulting from a non-uniform distribution of the residual polymer materials.…”

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confidence: 99%

Fast fringe-field switching of a liquid crystal cell by two-dimensional confinement with virtual walls

Choi

Park

et al. 2016

Sci Rep

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We report a simple method for reducing the response time of a fringe-field switching liquid crystal cell by using two-dimensional confinement of the liquid crystals. Through both numerical calculations and experiments, we show that the switching speed can be increased by several fold in a fringe-field switching cell by simply using a rubbing angle of zero, which causes virtual walls to be built when an electric field is applied between the interdigitated electrodes and the common electrode, without requiring additional fabrication steps or complicated drive schemes. Furthermore, the devices fabricated with this method exhibit a reduced color shift and excellent dynamic stability, even with a high applied voltage and under external pressure.

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A liquid crystal cell with double-side protrusion electrodes for fast response and low-voltage operation

Cited by 2 publications

References 22 publications

Achromatic polymer-dispersed liquid crystal lens with diffractive–refractive hybrid structure

Achromatic polymer-dispersed liquid crystal lens with diffractive–refractive hybrid structure

Fast fringe-field switching of a liquid crystal cell by two-dimensional confinement with virtual walls

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