Optical compensation methods for the elimination of off-axis light leakage in an in-plane-switching liquid crystal display

Oh, Seung‐Won; Kim, Ahn-Ki; Park, Byung Wok; Yoon, Tae–Hoon

doi:10.1080/15980316.2014.1003252

Cited by 34 publications

(9 citation statements)

References 26 publications

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“…Moreover, the turn-off time is not dependent on the pretilt angle. Therefore, to enhance viewing angle characteristics, viewing angle compensation methods developed for a conventional FFS cell with α ≠ 0 can be directly applied to a zero-rubbing-angle cell with little modification1718192021.…”

Section: Resultsmentioning

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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Section: Resultsmentioning

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

Self Cite

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“…A VA negative LC layer is sandwiched between the top substrate and bottom dielectric layer; the cell gap d is uniform throughout all the pixel area. In order to achieve a relatively better dark state in the R region, on each side of the TR‐LCD panel, a broadband half‐wave plate and quarter‐wave plate together with a linear polarizer and analyzer works as a circular polarizer . Additionally, a negative C‐plate is adopted to partially compensate the phase retardation from the VA negative LC layer .…”

Section: Device Structure and Principlementioning

confidence: 99%

“…In order to achieve a relatively better dark state in the R region, on each side of the TR-LCD panel, a broadband half-wave plate and quarter-wave plate together with a linear polarizer and analyzer works as a circular polarizer. [26][27][28][29][30][31][32] Additionally, a negative C-plate is adopted to partially compensate the phase retardation from the VA negative LC layer. 33 The top polarizer is crossed to the bottom one.…”

Section: Introductionmentioning

confidence: 99%

Simulation study of single‐cell‐gap transflective liquid crystal display with nonuniform potential

et al. 2019

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A single‐cell‐gap transflective liquid crystal display with a nonuniform electric potential is demonstrated. The top substrate has a top planar common electrode, a transparent dielectric layer with a general dielectric constant is coated on the bottom substrate, and two planar pixel electrodes with the same size are coated on the dielectric layer and the bottom substrate, respectively. With the different gaps between the two planar pixel electrodes and top planar pixel electrode, the nonuniform electric potential from the transmissive region (T region) to the reflective region (R region) is generated, while a bumpy reflector is coated under the bottom substrate. In this device, with the dielectric layer, the pixel and common electrodes generate a strong electric potential in the T region and a relatively weak electric potential in the R region. Consequently, the T and R regions accumulate the same optical phase retardation. The simulation results show that the display exhibits reasonably low operating voltage, high optical efficiency, and well‐matched voltage‐dependent transmittance and reflectance curves. Besides, the fabrication process and the driving mode of the transflective liquid crystal display are relatively simple, and it is suitable for mobile applications.

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“…This asymmetry negatively affects the viewing angle properties such as the light leakage, color shift, and grayscale inversion in the specific viewing angle direction [5,6]. To enhance the viewing angle properties of the single-domain planar mode, many optical compensation techniques have been proposed [7][8][9][10][11][12][13][14][15]. These optical compensation methods can reduce the light leakage and remove the grayscale inversion.…”

Section: Introductionmentioning

confidence: 99%

Póincare Sphere Analysis of the Pretilt Angle Effect on the Viewing Angle of a Single-Domain FFS Liquid-Crystal Mode

Lee

Oh²,

Shim

et al. 2016

Journal of the Optical Society of Korea

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We demonstrated the pretilt angle effect on the viewing angle properties of a single-domain fringe-field switching (FFS) liquid crystal (LC) mode. By performing the Póincare sphere analysis, we investigated, in detail, the origin of the viewing angle asymmetry that exists in the single-domain FFS LC mode both in the field-on and field-off states. Using this analysis, we confirmed that the pretilt angle reduces the viewing angle symmetry in the single-domain FFS LC mode. Finally, we examined the effect of a zero pretilt angle on the viewing angle symmetry by evaluating real single-domain FFS LC cells.

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Optical compensation methods for the elimination of off-axis light leakage in an in-plane-switching liquid crystal display

Cited by 34 publications

References 26 publications

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

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

Simulation study of single‐cell‐gap transflective liquid crystal display with nonuniform potential

Póincare Sphere Analysis of the Pretilt Angle Effect on the Viewing Angle of a Single-Domain FFS Liquid-Crystal Mode

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