Liquid crystal composition for TFT (Thin-Film Transistor) display

A liquid crystal composition and composition technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of insufficient low voltage, insufficient charge retention rate, and insufficient fast response of TFT-LCD, etc.

Active Publication Date: 2010-09-15
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, due to the limitation of the liquid crystal material itself, TFT-LCD still has many defects such as not fast enough response, not low enough voltage, not high enough charge retention rate, etc.

Method used

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  • Liquid crystal composition for TFT (Thin-Film Transistor) display
  • Liquid crystal composition for TFT (Thin-Film Transistor) display
  • Liquid crystal composition for TFT (Thin-Film Transistor) display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Take the following compositions I, II, III, IV, V, and optically active compound S2011 in the following weight percentages to prepare a liquid crystal composition. The specific ratio is shown in Table 1, and the properties of the obtained liquid crystal composition are also shown in Table 1:

[0110] Table 1 Proportion and performance parameters of the liquid crystal composition of Example 1

[0111] IIB-9 20% V 10 [V, 20°C] 1.40

[0112]IV-3 11% τ[ms] 49

[0113] IV-4 10% η [mm 2 / s, 20°C] 17.9

[0114] IIC-2 6% Cp[°C] 89.8

[0115] IIC-4 5% Δn[20°C, 589nm] 0.088

[0116] IIIA-6 4%

[0117] IIIA-8 4%

[0118] IIIA-14 7%

[0119] IIA-3 5%

[0120] IIA-4 5%

[0121] IA-3 5%

[0122] IB-3 5%

[0123] IIC-6 8%

[0124] VC-2 5%

[0125] S2011 0.1%

Embodiment 2

[0127] Take the following compositions I, II, III, IV, V, and optically active compound S2011 in the following weight percentages to configure a liquid crystal composition. The specific ratio is shown in Table 2, and the properties of the obtained liquid crystal composition are also shown in Table 2:

[0128] Table 2 The ratio and performance parameters of the liquid crystal composition of Example 2

[0129] IIB-9 20% V 10 [V, 20°C] 1.45

[0130] IV-3 15% τ[ms, 20°C] 45

[0131] IV-4 11% η [mm 2 / s, 20°C] 16.8

[0132] IIC-2 5% Cp[°C] 91.1

[0133] IIC-4 6% Δn[20°C, 589nm] 0.086

[0134] IIIA-6 2%

[0135] IIIA-8 4%

[0136] IIIA-14 5%

[0137] IIA-3 5%

[0138] IIA-4 5%

[0139] IA-3 5%

[0140] IB-3 5%

[0141] IIC-6 5%

[0142] VC-2 7%

[0143] S2011 0.14%

Embodiment 3

[0145] Take the following compositions I, II, III, IV, V, and optically active compound S2011 in the following weight percentages to configure a liquid crystal composition. The specific ratio is shown in Table 3, and the properties of the obtained liquid crystal composition are also shown in Table 3:

[0146] Table 3 The ratio and performance parameters of the liquid crystal composition of Example 3

[0147] IIB-9 15% V 10 [V, 20°C] 1.82

[0148] IIA-1 9% τ[ms] 50

[0149] IV-3 9% η [mm 2 / s, 20°C] 16.7

[0150] IV-4 10% Cp[°C] 86.9

[0151] IIIB-2 2% Δn[20°C, 589nm] 0.103

[0152] IIIB-3 3%

[0153] IIIA-4 5%

[0154] IIC-2 3%

[0155] IIC-4 4%

[0156] IIIA-6 5%

[0157] IIIA-8 5%

[0158] IIIA-14 5%

[0159] IIB-12 3%

[0160] IIA-3 4%

[0161] IIA-4 4%

[0162] IIC-6 3%

[0163] IA-3 5%

[0164] IB-3 6%

[0165] S811 0.12%

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Abstract

The invention provides a liquid crystal composition for TFT (Thin-Film Transistor) display. The liquid crystal composition is prepared from the following components in percentage by weight: 1-40 percent of I-type compound, 1-70 percent of II-type compound, 1-40 percent of III-type compound, 0-45 percent of IV-type compound and 0-20 percent of V-type compound. The liquid crystal composition has excellent performance, extremely low total response time (ttot=ton+toff), lower voltage, high resistance ratio and voltage retention ratio, and can also have different threshold voltages, clearing points and delta n characteristics by adjusting the contents of the components, thereby being particularly suitable for manufacturing rapid-response TN-TFT liquid crystal displays.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a composition for TFT liquid crystal display. Background technique [0002] At present, liquid crystals are widely used in the field of information display, and at the same time, some progress has been made in the application of optical communication (S.T.Wu, D.K.Yang. Reflective Liquid Crystal Displays. Wiley, 2001). Liquid crystal display (LCD) is an important application of liquid crystal—a special material. In recent decades, especially with the rapid development of information technology and people's constant pursuit of information display methods, liquid crystal display has gained the most rapid development. development of. [0003] Liquid crystal display has experienced a long development path with the discovery of liquid crystal. In 1888, the Austrian botanist Friedrich Reinitzer discovered the first liquid crystal material, cholesterol benzoate (cholesteryl benzoate). I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/30C09K19/20C09K19/12
Inventor 陈海光杭德余姜天孟杨春燕王广涛田会强储士红
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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