Sequential‐color LCD based on OCB with an LED backlight

Yamada, Fumiaki; Nakamura, Hajime; Sakaguchi, Y.; Taira, Yoichi

doi:10.1889/1.1827848

Cited by 70 publications

(51 citation statements)

References 7 publications

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“…The test-images appear much brighter than the reference vertical stripe display, because the lack of color filters increases the luminance by at least 1.5 [1]. In case of movement, however, color breakup may happen.…”

Section: Simulations Of Filter-less Color Sequential Displaysmentioning

confidence: 94%

“…when red, green, blue and white are used. For example: Assuming that the full pixel area is used instead of three sub pixels (a=1) and the gain in transparency due to the missing color filters is assumed one and a half times [1] (b=1.5) applying a R-G-B-W color sequential scheme and neglecting the addressing delays as well as the LC response times, the following gain in white can be achieved. …”

Section: Temporal Color Mixturementioning

confidence: 99%

“…Although this model can be used to simulate the dependency of the LC response time on the input, a constant response time is assumed to simulate linear behavior. The constant response time has been set to 2ms according to [1].…”

Section: Linear and Non-linear Model Of Temporal Lc Behaviormentioning

confidence: 99%

“…Due to these improvements, the idea came up to design color sequential LCD displays (e.g. [1]- [3]), where the color mixture is carried out by presenting the image color channels one after the other (temporal color mixture). Although the disadvantages of color sequential displays are known (most of all the color breakup effect [4]), some advantages encourage the design of such a LC display.…”

Section: Introductionmentioning

confidence: 99%

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A multiprimary display model combined with a spatio-temporal behavioral display model for display characterization by simulation

Dolar

Lebowsky

2009

SPIE Proceedings

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With the development of fast liquid crystal cells and with advent of backlight units with separate red, green and blue light emitting diodes also first commercial color sequential display emerge. Another technique in commercial application proposes implementing more than three subpixels and thus enhanced color gamut by using multiple color primaries. Also the combination of both color mixture techniques is possible. It is thus desirable to have a simulation workbench at hand that is flexible enough to adapt to the various possibilities of subpixel design and color sequences in display design to evaluate the displayed image in advance. The combination of a multiprimary display model, which can emulate a multiprimary display on a standard RGB LC display, and a spatio-temporal model, that describes LC pixel behavior to arbitrary input signals over time, provides means for simulating the perceived image of a color-sequential display behavior. This article describes the combined model and gives also simulation results that compare advanced displays to conventional vertical stripe RGB LC display.

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Section: Simulations Of Filter-less Color Sequential Displaysmentioning

confidence: 94%

Section: Temporal Color Mixturementioning

confidence: 99%

Section: Linear and Non-linear Model Of Temporal Lc Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A multiprimary display model combined with a spatio-temporal behavioral display model for display characterization by simulation

Dolar

Lebowsky

2009

SPIE Proceedings

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“…Fast response time not only reduces motion picture image blurs but also enables color sequential liquid crystal displays using RGB (red, green, blue) LED backlight. 2,3 The latter is particularly attractive because it eliminates spatial color filters which in turn triples the optical efficiency and resolution density. Higher optical efficiency leads to lower power consumption which implies to energy saving and longer battery life.…”

Section: Introductionmentioning

confidence: 99%

Emerging blue phase liquid crystal displays

Rao

2010

SPIE Proceedings

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Device physics and electro-optical properties of emerging polymer-stabilized blue-phase liquid crystal displays (BPLCDs) are investigated. The novel protruded electrodes generate strong horizontal electric fields which penetrate deeply into the bulk LC layer. As a result, the operating voltage is reduced from over 50V rms to ~10 V rms , which for the first time enables the BP-LCDs to be addressed by amorphous silicon thin-film-transistors (TFTs). Kerr constant effect from the material side is also evaluated quantitatively. Widespread application of TFT BP-LCDs is foreseeable.

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Synthesis of Predesigned Ferroelectric Liquid Crystals and Their Applications in Field‐Sequential Color Displays

Zhang

Liu

Emelyanenko

et al. 2018

Adv Funct Materials

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A series of low transition temperature and fast response chiral smectic C (SmC*) liquid crystals is designed and synthesized. The phase transition behaviors and electrooptical properties of the synthesized compounds are investigated and compared with reported values. The ferroelectric phase of the liquid crystals is characterized by means of differential scanning calorimetry, polarizing optical microscopy, wide-angle X-ray scattering (WAXS), and electrooptical measurements. The wide SmC* phase is achieved via the induction of achiral trisiloxane and a chiral methyl-lateral substituent onto the terminuses of the molecules. The optimized packing arrangement model is studied based on the exceptionally high apparent tilt angles (≈41°) and smectic layer spacing observed using WAXS. A fast response time of 0.3 ms in an electric field of 10 V µm −1 provides an opportunity to use the synthesized materials for field-sequential color liquid crystal displays (FSCLCDs). An FSCLCD sample cell is fabricated using the synthesized ferroelectric liquid crystals via a red (R), green (G), and blue (B) backlight. A color-frame frequency of more than 500 Hz (i.e., a frame frequency more than 166 Hz) is achieved. As a single material liquid crystal display cell, the synthesized ferroelectric liquid crystals show great performances at room temperature.

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Sequential‐color LCD based on OCB with an LED backlight

Cited by 70 publications

References 7 publications

A multiprimary display model combined with a spatio-temporal behavioral display model for display characterization by simulation

A multiprimary display model combined with a spatio-temporal behavioral display model for display characterization by simulation

Emerging blue phase liquid crystal displays

Synthesis of Predesigned Ferroelectric Liquid Crystals and Their Applications in Field‐Sequential Color Displays

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