Compound, Liquid Crystal Composition, and High-Frequency Phase Shifter

The development of specific compounds represented by general formula (I) addresses the limitations of existing liquid crystal compositions by enhancing refractive index anisotropy, transition temperature, and dielectric anisotropy, thereby improving their suitability for advanced antenna applications.

JP7653316B2Active Publication Date: 2025-03-28SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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Patent Information

Application Number
JP2021109973
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-07-14
Filing Date
2021-07-01
Publication Date
2025-03-28
Estimated Expiration
2041-07-01

AI Technical Summary

Technical Problem

Existing liquid crystal compositions for antenna applications lack compounds with sufficient refractive index anisotropy (Δn), high transition temperature (Tni), and compatibility, as well as adequate dielectric anisotropy in the high frequency range.

Method used

Development of specific compounds represented by the general formula (I), which include various alkyl groups, halogen atoms, and specific substituents, to enhance compatibility, refractive index anisotropy, and dielectric anisotropy, thereby improving the liquid crystal composition's performance for antenna applications.

Benefits of technology

The compounds achieve a large refractive index anisotropy, sufficient high Tni, high compatibility with liquid crystal compositions, and significant dielectric anisotropy in the high frequency range, making them suitable for high-frequency phase shifters, phased array antennas, and other applications.

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Abstract

To provide a compound which has a large refractive index anisotropy (Δn), a sufficiently high Tni and high compatibility with a liquid crystal composition and exhibits a large dielectric anisotropy (Δε) in a high frequency region and to provide a liquid crystal composition comprising the compound and a device using the liquid crystal composition.SOLUTION: There is provided a composition represented by the following general formula (I) and there are provided a liquid crystal composition comprising the compound and a device using the liquid crystal composition. Since the compound has a large refractive index anisotropy Δn, a sufficiently high Tni and high compatibility with a liquid crystal composition and exhibits a large dielectric anisotropy in a high frequency region, the compound is useful as a material for devices of a high frequency phase shifter, a phased array antenna, an image recognition device, a distance measuring device, a liquid crystal display element, a liquid crystal lens and a birefringent lens for a stereoscopic image display.SELECTED DRAWING: None
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