A dimming device comprising a guest-host liquid crystal composition

A technology of liquid crystal composition and dimming device, which is applied in the directions of liquid crystal materials, optics, nonlinear optics, etc., can solve the problems of complex fabrication of dimming devices, poor transparency, high energy consumption and safety, etc.

Active Publication Date: 2021-03-16
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this liquid crystal polymer dimming device has haze, and the driving voltage is high (generally above 30V), therefore, there are large energy consumption and safety problems, and the transparency is poor, and the complex structure of the PDLC device causes the dimming Optical devices have the problems of complex manufacturing and high mass production costs

Method used

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  • A dimming device comprising a guest-host liquid crystal composition
  • A dimming device comprising a guest-host liquid crystal composition
  • A dimming device comprising a guest-host liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] The parent liquid crystal 1 of embodiment 1 was prepared by each compound listed in table 3 and the weight percentage, and it was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the table below:

[0134] Table 3 Composition and ratio of matrix liquid crystal

[0135]

[0136] Add 0.15% dye 13 + 0.05% dye 7 + 0.4% dye 25 to the matrix liquid crystal 1 to form dye liquid crystal composition A, fill the guest-host liquid crystal composition into the dimming device of the present invention, and the dimming device is black , the transmittance and current changes are shown in Table 4:

[0137] Table 4

[0138] Guest-host liquid crystal composition A Transmittance change (bright→dark) 85％→50％ I 0.02μA I uv

Embodiment 2

[0140] The parent liquid crystal 2 of embodiment 2 is prepared by each compound listed in table 5 and the percentage by weight, which is filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the table below:

[0141] Table 5 Composition and ratio of matrix liquid crystal

[0142]

[0143]

[0144] Add 0.30% dye 13+0.10% dye 7+0.80% dye 25 to the matrix liquid crystal 2 to form guest-host liquid crystal composition B, fill the guest-host liquid crystal composition into the dimming device of the present invention, and the dimming device is black , the transmittance and current changes are shown in Table 6:

[0145] Table 6

[0146] Guest-host liquid crystal composition B Transmittance change (bright→dark) 70％→38％ I 0.03μA I uv

Embodiment 3

[0148] The parent liquid crystal 3 of Example 3 was prepared by each compound listed in Table 7 and the weight percentage, and it was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the table below:

[0149] Table 7 Composition and ratio of matrix liquid crystal

[0150]

[0151] Add 0.60% Dye 13 + 0.20% Dye 7 + 1.60% Dye 25 to the matrix liquid crystal 3 to form a guest-host liquid crystal composition C, fill the guest-host liquid crystal composition into the dimming device of the present invention, and the dimming device is black , the transmittance and current changes are shown in Table 8:

[0152] Table 8

[0153] Guest-host liquid crystal composition C Transmittance change (bright→dark) 57％→18％ I 0.01μA I uv

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Abstract

The invention provides a dimming device containing a guest-host liquid crystal composition. The dimming device comprises an upper substrate, a lower substrate, an upper electric conduction layer, a lower electric conduction layer, an upper aligning layer, a lower aligning layer and the guest-host liquid crystal composition which is sandwiched between the upper aligning layer and the lower aligninglayer, wherein the guest-host liquid crystal composition comprises a dichroic dye and mother liquid crystals. As the guest-host liquid crystal composition is used for dimming, a polarizer is omitted,and the cost is greatly reduced.

Description

technical field [0001] The present invention relates to a dimming device, in particular to a dimming device comprising a guest-host liquid crystal composition. Background technique [0002] In the prior art, the dimming device market is booming, and there are more and more types of dimming devices, which are widely used in automotive glass, architectural decoration, outdoor curtain walls and other fields. [0003] Windows or glass curtain walls are building parts through which most of the energy is fed into the building under intense solar radiation. In winter, it is desired that the maximum amount of light and thus transmitted energy enter the building through the glass surfaces. This saves on heating and lighting costs. On the other hand, in the warm season it is desirable that as little energy as possible be input into the building through the glass surfaces. As a result, a more comfortable indoor climate can be achieved or air-conditioning costs can be saved. Further...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G02F1/137G02F1/139C09K19/60
CPCC09K19/601C09K19/603G02F1/13725G02F1/13737G02F1/13762G02F1/139
Inventor杨亚非王莉丁文全韩文明贺笛
OwnerJIANGSU HECHENG DISPLAY TECHCO