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Liquid crystal composition

A technology of liquid crystal composition and liquid crystal compound, which is applied in the direction of liquid crystal materials, optics, instruments, etc., and can solve problems such as the reduction of voltage retention rate

Inactive Publication Date: 2017-08-08
DONGJIN SEMICHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When some substances are degraded by heat or ultraviolet light, a very small amount of deterioration may cause a serious decrease in voltage retention

Method used

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  • Liquid crystal composition
  • Liquid crystal composition
  • Liquid crystal composition

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Embodiment Construction

[0088] Next, the functions and effects of the present invention will be described in more detail through specific embodiments of the present invention. However, the following examples are merely examples of the present invention, and the scope of claims of the present invention is not limited to the following examples.

[0089] The physical properties of the liquid crystal compositions prepared as follows were evaluated by the methods described below.

[0090] 1) Transparent point

[0091] A liquid crystal compound to be measured for the clearing point is dropped on a slide glass with a dropper, and then covered with a cover glass to prepare a sample for measuring the clearing point.

[0092] Put the prepared sample into the instrument with METTLER TOLEDO FP90 temperature controller, use the FP82HT hot stage (Hot stage) to increase the temperature at a speed of 3°C / min, and observe the changes of the sample. The temperature at the site where the hole appeared on the sample w...

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Abstract

The present invention relates to a liquid crystal composition. The liquid crystal composition exhibits a high voltage holding ratio even when exposed to heat or ultraviolet light for a long period of time due to the presence of a special additive in the mother liquid having excellent physical properties, so that a very high reliability can be ensured. In addition, by using a combination of such a liquid crystal compound and an additive, it is possible to provide an optimized liquid crystal composition for various liquid crystal display devices such as TN, STN, IPS, FFS or PLS modes.

Description

technical field [0001] The invention relates to an anti-ultraviolet (UV) and heat-resistant liquid crystal composition, which is applicable to a thin film transistor liquid crystal display (TFT LCD). The characteristics of the liquid crystal composition can effectively improve spots and afterimages caused by long-term use of thin film transistor liquid crystal displays. Background technique [0002] The thin film transistor liquid crystal display needs to apply a voltage to the pixels within a certain period (for example, 60 Hz, 120 Hz or 240 Hz). In this driving mode, the inner liquid crystal layer and the external power supply are in a floating state during the non-selected period. The charge charged to the liquid crystal layer of the pixel during the selected period is released to the internal resistance of the liquid crystal during the non-selected period. The degree to which the liquid crystal layer maintains the charged voltage in the state where the electrodes in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/54G02F1/1333
CPCC09K19/54G02F1/1333C09K19/20C09K19/3001C09K19/42C09K2019/3004
Inventor 李仙熙金奉熙赵泰杓金炳旭
Owner DONGJIN SEMICHEM CO LTD