Low voltage and high transmittance blue-phase LCDs with double-side in-plane switching electrodes

Chen, Yanqing; Sun, Yubao; Yang, Guoqiang

doi:10.1080/02678292.2011.558216

Cited by 28 publications

(21 citation statements)

References 13 publications

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“…However, there are still some problems in the commercialization of BP devices: (1) the operating voltage is as high as several tens of volts, which limit the use of thin-film transistor as the addressing element for BPLCDs; (2) the low transmittance (∼75%) caused by the low aperture ratio due to the presence of strip electrodes for driving the switching voltage; (3) the poor dark state which forms after a few driving frames, which is induced by the residual birefringence [39] and decreases the contrast ratio [40]; and (4) the switching hysteresis [41] induced by the chirality [42] or polymer network [43] makes consistent gray levels difficult to obtain [44]. …”

Section: Introductionmentioning

confidence: 99%

Blue phase liquid crystal: strategies for phase stabilization and device development

Rahman

Said

Balamurugan

2015

Science and Technology of Advanced Materials

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The blue phase liquid crystal (BPLC) is a highly ordered liquid crystal (LC) phase found very close to the LC–isotropic transition. The BPLC has demonstrated potential in next-generation display and photonic technology due to its exceptional properties such as sub-millisecond response time and wide viewing angle. However, BPLC is stable in a very small temperature range (0.5–1 °C) and its driving voltage is very high (∼100 V). To overcome these challenges recent research has focused on solutions which incorporate polymers or nanoparticles into the blue phase to widen the temperature range from around few °C to potentially more than 60 °C. In order to reduce the driving voltage, strategies have been attempted by modifying the device structure by introducing protrusion or corrugated electrodes and vertical field switching mechanism has been proposed. In this paper the effectiveness of the proposed solution will be discussed, in order to assess the potential of BPLC in display technology and beyond.

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Section: Introductionmentioning

confidence: 99%

Blue phase liquid crystal: strategies for phase stabilization and device development

Rahman

Said

Balamurugan

2015

Science and Technology of Advanced Materials

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“…Consequently, the birefringence of the cell along the right viewing direction is zero, and the light leakage from the LSP to the right viewing direction is expected to be suppressed. The slit electrodes on both the top and bottom substrates are designed to produce inclined electric field through the LC cell, but not for high transmittance or low operation voltage of the BP LCD, as reported in other literature [16]. Furthermore, in this paper, the inclined electric field parallel to the unintended viewing direction provides the cell a low dark state and a low crosstalk in the unintended viewing direction.…”

Section: Structurementioning

confidence: 84%

Dual-View Blue Phase Liquid Crystal Display

Hsieh

Chang

Lin

et al. 2015

J. Display Technol.

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In this paper, we propose a dual-view (DV) liquid crystal display (LCD) using blue phase (BP) liquid crystal (LC) in conjunction with the patterned electrode cell. Given the optically isotropic state of the BP LC material, the DV BP LCD is equipped with a low dark state and, therefore, a high contrast ratio that exceeds 1000 in the intended viewing direction. The patterned electrode structure provides inclined electric field parallel to the unintended viewing direction and creates approximately zero phase retardation, thus suppressing light leakage in the unintended viewing direction.Index Terms-Blue phase liquid crystal (BPLC), dual-view display.

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“…[1][2][3][4][5] But two questions need to be solved: one is the stable blue-phase liquid crystal (BPLC) material compounds with high dielectric anisotropy and birefringence, and the other is the new structure proposed to fit the normal fabricating process. The conventional in-plane switching (IPS) BPLCD [6][7][8][9][10][11][12][13] employed the strip electrodes is fabricated easily, however, its operating voltage is far larger than the tolerance of the amorphous-silicon thin film transistors (a-Si TFTs), and its peak transmittance is not high enough. [9] In order to reduce the operating voltage, a variety of methods have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Blue-phase liquid crystal display with high dielectric material

Liu

Sun

2016

Liquid Crystals

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A blue-phase liquid crystal display (BPLCD) with low operating voltage and high transmittance is demonstrated by using a high dielectric material, which is used as an insulation layer or protrusion fixed on the pixel and common electrodes in in-plane switching (IPS) mode. The operating voltage is reduced to about 14 V and the transmittance is improved for the BPLCD with high dielectric constant protrusion. Compared with the conventional protrusion electrode structure, the proposed protrusion can make manufacturing process simple and easy because the electrode has no complex shape. The results will be significant in designing optimal BPLCDs. ARTICLE HISTORY

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Low voltage and high transmittance blue-phase LCDs with double-side in-plane switching electrodes

Cited by 28 publications

References 13 publications

Blue phase liquid crystal: strategies for phase stabilization and device development

Blue phase liquid crystal: strategies for phase stabilization and device development

Dual-View Blue Phase Liquid Crystal Display

Blue-phase liquid crystal display with high dielectric material

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