Liquid Crystal Displays

Lüeder, E.

doi:10.1002/9780470688342

Cited by 96 publications

(31 citation statements)

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“…The dielectric permittivity of the nematic liquid crystals is anisotropic due to long-range orientation order. Dielectric behavior of a nematic liquid crystal is described by two dielectric constants, ε || and ε ⊥ and the dielectric anisotropy is defined as Δε = ε || − ε ⊥ [11]. Dielectric anisotropy (Δε) is one of the most important physical properties of liquid crystalline compounds, which in essence determines the lower threshold voltages of liquid crystal displays (LCDs) [12].…”

Section: Resultsmentioning

confidence: 99%

Electrical Parameters of Different Concentrations of Methyl Red in Fullerene Doped Liquid Crystal

et al. 2012

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Dielectric anisotropy and relaxation time of a liquid crystal (LC) system, containing fullerene and methyl red (MR) dye, were studied via impedance spectroscopy technique under a bias voltage. Dye concentration is tried to be 0.1%, 0.5%, and 1% in host nematic liquid crystal coded E7. Dielectric permittivity and dielectric anisotropy values of the samples were investigated between the frequency ranges of 100-10 MHz. It is seen that dielectric anisotropy is strongly affected by doping ratio and this value decreases with increasing dye. Also, relaxation time τ and critical frequency f c values were calculated depending on voltage of different dye ratios.

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Section: Resultsmentioning

confidence: 99%

Electrical Parameters of Different Concentrations of Methyl Red in Fullerene Doped Liquid Crystal

et al. 2012

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“…Liquid crystal displays (LCDs) have advantages of flatpaneled, high resolution, high brightness and lightweight and are widely used for mobile devices such as smart phone, tablets and digital cameras [1][2][3]. In the mobile devices, the LCD is usually edgelit that a light source (such as LED) is installed on the edge of the display [4].…”

Section: Introductionmentioning

confidence: 99%

P-138: Polarizing Light Waveguide Plate

Moheghi

Qin

Yang

2016

SID Symposium Digest of Technical Papers

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Liquid crystal displays (LCDs) are widely used for mobile devices. They are usually edgelit that a LED light source is installed at the edge of the displays and the produced light is spread out through a light waveguide plate to illuminate the display. We developed a polarizing light waveguide plate from polymer stabilized nematic liquid crystal. It can convert unpolarized light from the edgelight into linearly polarized light by selective scattering. It can greatly increase the light efficiency of edgelit LCDs.

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“…Notably, LCs in LCDs do not emit light, they only control whether light gets through LCs or not, so that back-light/front-light units are needed for LCDs according to transmissive or reflective modes. In terms of the operating mechanisms, the commercially adopted LCDs are divided into the following modes [1][2][3], including twisted nematic (TN), super twisted nematic (STN), mixed-mode twisted nematic (MTN), vertical alignment (VA), optically compensated bend (OCB, π-cell), in-plane-switching (IPS), ferroelectric LC (FLC), guest-host (G-H), polymer dispersed LC (PDLC), cholesteric reflection, LC on silicon (LCoS), reflective, transflective modes, and so on. Typically, for a LCD, each pixel is divided into three (red, green and blue) or four (red, green, blue and yellow/white) sub-pixels with the color based on additive color principle.…”

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“…The mixed mode means the combination of polarization rotation and phase retardation. Usually, it should be noted that MTN mode can be adopted to fabricate a reflective LCD, and will be introduced in next section [1][2][3][4].…”

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Liquid Crystal Display—Present Status and Emerging Technology

Cheng

2014

Topics in Applied Physics

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Nowadays, in your daily lives, the applications of LCs, such as LCD TVs, computer/laptop monitors, mobile phones, navigators, digital cameras, and so on, are widely used worldwide. Even, wherever you are whatever you do, you can take your electronics out of your pocket to check your e-mails, listen to music, watch movies, find your way, and so many others. LCDs provide high performance in regard to the weight, volume, contrast ratio, viewing angle, low power consumption, etc. That's why the high-quality applications of LCDs are indispensable and paid much attention by scientists and electronics industries in the recent decade. Undoubtedly, LCDs have acted as a leader in the field of flat panel displays, in not only small-sized displays, but also large-sized ones. Refer to cathode ray tube (CRT) monitors; LCDs have almost completely replaced CRT monitors in the display market because of their bulky and high power consumption, despite their good response time, viewing angle, image quality. However, in addition to the present status of LCD applications, some emerging technologies, such as wide viewing angle displays, fast response displays, blue phase LCDs, flexible displays, 3D displays, high resolution displays, in-cell touch panel, electronic papers, tablets, etc., have also attracted much attention. In this chapter, the introductions of the present status of LCD industry, as well as the emerging technology for improving the performances of LCDs will be given. Liquid Crystal Display ModesRegarding the commercial products of LCDs [1-3], their operating principles for modulating light intensity and/or light polarization include polarization

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Liquid Crystal Displays

Cited by 96 publications

References 0 publications

Electrical Parameters of Different Concentrations of Methyl Red in Fullerene Doped Liquid Crystal

Electrical Parameters of Different Concentrations of Methyl Red in Fullerene Doped Liquid Crystal

P-138: Polarizing Light Waveguide Plate

Liquid Crystal Display—Present Status and Emerging Technology

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