A multicolor projection display with a bright screen and high information content using nematic-cholesteric (NC) liquid crystals is discussed. Through investigation of light scattering in the focal-conic state of the NC liquid-crystal layer, it was found that the transmittance depends on the light wavelength due to diffraction scattering and that the color of light transmitted through the layer can be controlled by the birefringence and the thickness of the liquid-crystal layer. A 640*400 pixel multicolor projection display was fabricated using a two-layered liquid-crystal panel, each layer passing green and red light under the focal-conic state. The Munsell chroma value was six for both the projected colors. The projector provides excellent white and black because of the high transmittance of the nematic state and the subtractive mixture of complementary colors.< >

10.1109/16.34264

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Citations (1)

Dynamics of Surface-Stabilized Ferroelectric Liquid Crystals at the Alignment Layer Surface Studied by Total-Reflection Ellipsometry

Japanese Journal of Applied Physics (2001)

Toshiyasu Tadokoro Ken‐ichi Akao Toshiaki Yoshihara Satoshi Okutani M. Kimura

The reorientation dynamics of surface-stabilized ferroelectric liquid crystals (SSFLCs) at the substrate surface have been studied by time-resolved spectroellipsometry (TRSE). The results of total-reflection TRSE indicate that the surface motion of SSFLC molecules is hindered by a strong anchoring system. The observed dependence of the ellipsometric parameter Ψ on the orienting layer material is discussed in terms of the competitive effects of the surface tilt angle and the strength of the surface anchoring effect. It is also demonstrated that TRSE can analyze the mode of motion of SSFLC molecules in three-dimensional space and can therefore characterize the hysteresis properties of the SSFLC cell in terms of its structural changes.

Anchoring

Ellipsometry

Reflection

Hysteresis

Dynamics

10.1143/jjap.40.l453

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Citations (7)

A 1M‐pixel full‐color projection display using nematic‐cholesteric phase‐transition liquid crystals

Journal of the Society for Information Display (1993)

Yoshikazu Yabe Hirofumi Saito Toshiaki Yoshihara Shigeo Kasahara Akihiro Mochizuki

Abstract— A 1M‐pixel full‐color projection display with a very simple optical system using a conventional overhead projector has been developed. This display uses the nematic‐cholesteric phase‐transition liquid‐crystal display and a micro‐color‐filter. Moreover, the micro‐color‐filter can be placed outside the liquid‐crystal panel. This simple configuration provides a high‐performance low‐cost color electronic overhead projector. This projection display uses a 9M‐pixel nematic‐cholesteric phase‐transition black‐and‐white liquid‐crystal panel to enable gray shades by spatial dither, resulting in a full‐color projection display. A 12:1 contrast ratio and 2.2‐ms line‐addressing time is achieved.

Contrast ratio

Color filter array

10.1889/1.1984895

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Citations (3)

Surface Anchoring Influence on Polarization Switching Properties of Ssflcs

Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals (1997)

A. Mochizuki T. Makino Hironori Shiroto Yoshinori Kiyota Toshiaki Yoshihara

Abstract Polarization switching properties of SSFLCs in terms of the surface anchoring effect were investigated. Low frequency and low voltage triangular waveform applications on to low, medium and high pretilt cells suggest that the low pretilt chevron geometry cell provides stronger anchoring effect. Low pretilt quasi-bookshelf cell indicates whole LC molecule's switchings including the interface area. This conclusion is also supported by the polarization switching study under the compression and expansion environment.

Anchoring

10.1080/10587259708046981

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A 1M‐pixel full‐color projection display using nematic‐cholesteric phase‐transition liquid crystals

Journal of the Society for Information Display (1994)

Yoshikazu Yabe Hirofumi Saito Toshiaki Yoshihara Shigeo Kasahara Akihiro Mochizuki

10.1889/1.1984912

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52.1: Invited Paper: A 254‐ppi Full‐color Video Rate TFT‐LCD Based on Field Sequential Color and FLC Display

SID Symposium Digest of Technical Papers (2000)

Toshiaki Yoshihara T. Makino Hiroshi Inoue

Abstract We introduce a high‐resolution full‐color video rate FLC display that is based on field sequential color with an amorphous Si TFT array. Research on particular polarization switching properties provided us with the technology for quick switching FLCs using amorphous silicon TFT technology. We created a prototype and confirmed that it is capable of providing a gray scale, fast response time, excellent color purity, and a wide viewing angle. Our prototype demonstrated that producing a high‐resolution full‐color video rate display is possible based on this technology.

Full color

10.1889/1.1832875

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Citations (11)

Two-dimensional optical scanner having a trenched SOI movable frame for electrical isolation between inner and outer vertical comb actuators

H. Noge Yosuke Hagihara K. Kawano Hitoshi Ueda Toshiaki Yoshihara

Comb drive

Isolation

Source

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Dynamics of Surface-Stabilized Ferroelectric Liquid Crystals at the Alignment Layer Surface Studied by Total-Reflection Ellipsometry : Structure and Mechanical and Thermal Properties of Condensed Matter