Jiangsu Hecheng Display Technology Company

Nanjing, China

Jiangsu Hecheng Display Technology Company

Nanjing, China
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Patent
Jiangsu Hecheng Display Technology Co. | Date: 2015-08-12

The present invention discloses a liquid crystal composition comprising: 15-35% by weight of a compound of general formula I; 3-20% by weight of a compound of general formula II; 5-30% by weight of a compound of general formula III; 1-20% by weight of a compound of general formula IV; 10-35% by weight of a compound of general foiiiiula V-1 and/or a compound of general formula V-2; and 1-25% by weight of a compound of general formula VI. The liquid crystal composition provided by the present invention has the characteristics of an appropriate optical anisotropy, an appropriate dielectric anisotropy, a higher clearing point, a better voltage holding ratio, and a good UV-resistant stability, etc., and can be applied to a liquid crystal display.


Gao L.,Hebei University of Technology | Zheng Z.-Z.,Hebei University of Technology | Zhu J.-L.,Hebei University of Technology | Han W.-M.,Jiangsu Hecheng Display Technology Co. | Sun Y.-B.,Hebei University of Technology
Optics Letters | Year: 2016

We proposed a dual-period phase grating using a polymer-stabilized blue phase liquid crystal (PS-BPLC). High efficiencies of 38% for the short-period phase grating and 30% for the long-period phase grating have been achieved because of the electric-field-induced rectangular-like phase profile of a PS-BPLC, which agrees quite well with the simulation results. The diffraction angle and the diffraction efficiency can be alternatively tuned by a bias voltage and intensity of applied voltage. The diffracted light of each diffraction order is elliptically polarized, and its ellipticity is larger than that induced by using the conventional nematic LCs. Such a device also shows sub-millisecond response time and holds great potential for photonics applications. © 2016 Optical Society of America.


Yan J.,University of Central Florida | Chen Y.,University of Central Florida | Wu S.-T.,University of Central Florida | Song X.,Jiangsu Hecheng Display Technology Company
IEEE/OSA Journal of Display Technology | Year: 2013

A figure of merit (FoM), defined as the ratio of Kerr constant to response time, is used to characterize and compare the electro-optic performance of polymer-stabilized blue phase liquid crystals (BPLCs). Increasing the dielectric anisotropy of LC host enhances Kerr constant and lowers the operation voltage, but its associated high viscosity dramatically increases the response time. As a result, the FoM may not be necessarily higher. For a given BPLC device, an optimal temperature exists where FoM reaches maximum. The proposed FoM provides useful guidelines for optimizing BPLCs for display and photonic applications. © 2012 IEEE.


Patent
Jiangsu Hecheng Display Technology Co. | Date: 2014-01-26

Provided are a stable alignment type liquid crystal composition and use thereof. The liquid crystal composition has negative dielectric anisotropy, better stability and a large absolute value of dielectric anisotropy. The liquid crystal composition comprises a compound of general formula (I) accounting for 10%-80% of the total weight of the liquid crystal composition, a compound of general formula (II) accounting for 0.0005%-0.5% of the total weight of the liquid crystal composition, a compound of general formula (IV) accounting for 15%-90% of the total weight of the liquid crystal composition, and a polymerizable compound accounting for 0.1%-5% of the total weight of the liquid crystal composition. The liquid crystal composition is less subject to interference of such factors as radicals, oxygen, heat or the like. Also provided is the use of the liquid crystal composition in a liquid crystal display device.


The present invention provides a liquid crystal composition applicable to an active matrix (AM) device and having a nematic phase and positive dielectric anisotropy, and an AM liquid crystal display device comprising the liquid crystal composition. By the total weight of the liquid crystal composition, the liquid crystal composition comporises 8%-50% of compound expressed by a general formula (I), 10%-70% (by weight) of compound expressed by a general formula (II), and 5%-50% (by weight) of compound expressed by a general formula (III).


Patent
Jiangsu Hecheng Display Technology Co. | Date: 2014-03-12

The present invention provides a liquid crystal composition, the liquid crystal composition including at least one compound of general formula (I); at least one compound of general formula (II) that accounts for 5-75% of the total weight of the liquid crystal composition; at least one compound of general formula (III) that accounts for 0-25% of the total weight of the liquid crystal composition; and at least one compound of general formula (IV) that accounts for 5-75% of the total weight of the liquid crystal composition. The liquid crystal composition of the present invention has characteristics of great optical anisotropy, small viscosity, good low-temperature stability, high stability against ultraviolet rays and high thermal stability, is applicable to AM elements, and has characteristics such as a short corresponding time, great contrast and a long service life. The present invention further provides an active matrix liquid crystal display device including the liquid crystal composition.


Patent
Jiangsu Hecheng Display Technology Co. | Date: 2013-04-10

A liquid crystal composition and a liquid crystal display wherein the liquid crystal composition includes: a compound of general formula (I) including 1%-50% of the total weight of the liquid crystal composition; a compound of general formula (II) including 1%-60% of the total weight of the liquid crystal composition; a compound of general formula (III) including 1%-60% of the total weight of the liquid crystal composition; and a compound of general formula (IV) including 0-50% of the total weight of the liquid crystal compositionwherein the liquid crystal composition has a suitably wider nematic phase scope, a suitable optical anisotropy, a favorable low-temperature storage stability a faster response speed, can be used for outdoor work, has a good image display effect, and substantially free of streaking phenomenon.


Patent
Jiangsu Hecheng Display Technology Co. | Date: 2012-07-31

A liquid crystal composition that is useful for an active matrix (AM) device has a nematic phase and positive dielectric anisotropy. An active matrix liquid crystal display device includes the liquid crystal composition. By the total weight of the liquid crystal composition, the liquid crystal composition comprises 8%-50% of a compound of the general formula (I), 10%-70% (by weight) of a compound of the general formula (II), and 5%-50% (by weight) of a compound of the general formula (III).


Patent
Jiangsu Hecheng Display Technology. Ltd. | Date: 2013-05-31

A triphenylene derivative of general formula (I) or general formula (II) can be used as a component of liquid crystal medium. The compound can be used to form a negative discotic liquid crystal composition having a suitable temperature range of liquid crystal phase and a lower clearing point, which can be used in TFT liquid crystal displays as an optical compensation film (cell) material.


Patent
JIANGSU HECHENG DISPLAY TECHNOLOGY Co. | Date: 2013-05-31

A dichromatic dye composition which has the characteristics of higher order parameter and good miscibility can be applied in a guest-host liquid crystal composition. The absorbance curve of a guest-host liquid crystal composition with the dichromatic dye composition within the range of 420-680 nm has the following characteristics: a. 2(T1+T2)/T10; b. |T1T2|0.5; c. 0

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