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Optical compensation film and preparation method thereof

A technology of optical compensation film and optical activity, applied in chemical instruments and methods, optics, nonlinear optics, etc., can solve problems such as poor user experience and weakened display brightness of liquid crystal panels

Inactive Publication Date: 2017-06-23
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, although the liquid crystal display module can achieve a high color gamut, it also has the problems of weakening the display brightness of the liquid crystal panel and poor user experience.

Method used

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  • Optical compensation film and preparation method thereof
  • Optical compensation film and preparation method thereof
  • Optical compensation film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0050] First, a first cholesteric liquid crystal composition with a left-handed optical rotation and a second cholesteric liquid crystal composition with a right-handed optical rotation are mixed, and they are uniformly mixed at room temperature to form a mixture.

[0051] In this example, the first cholesteric liquid crystal composition includes 73% by weight of small-molecule nematic liquid crystals, 9% by weight of photopolymerizable monomers (shown below), and 17.5% by weight of chiral with left-handed nature. Siloxane liquid crystal molecules and 0.5% by weight of the photoinitiator, so that the optical rotation of the first cholesteric liquid crystal composition is left-handed.

[0052] Photopolymerizable monomer

[0053]

[0054] In addition, the second cholesteric liquid crystal composition includes 17.5% by weight of chiral siloxane liquid crystal molecules with dextrorotatory properties to make the optical rotation of the second cholesteric liquid crystal composition dextro...

example 2

[0060] First, a first cholesteric liquid crystal composition with a left-handed optical rotation and a second cholesteric liquid crystal composition with a right-handed optical rotation are mixed, and they are uniformly mixed at room temperature to form a mixture.

[0061] In this example, the first cholesteric liquid crystal composition includes 69.3% by weight of small molecule nematic liquid crystals, 10% by weight of photopolymerizable monomers (as shown below), 11% by weight of siloxane liquid crystal molecules, 9% by weight of a chiral additive with levorotatory properties (the structure is shown below) is used as the first chiral additive and 0.7% by weight of photoinitiator to make the optical rotation of the first cholesteric liquid crystal composition levorotatory.

[0062] Photopolymerizable monomer

[0063]

[0064] Chiral additives

[0065]

[0066] In addition, in the second cholesteric liquid crystal composition, in addition to including 9% by weight of the chiral addit...

example 3

[0070] First, a first cholesteric liquid crystal composition with a left-handed optical rotation and a second cholesteric liquid crystal composition with a right-handed optical rotation are mixed, and they are uniformly mixed at room temperature to form a mixture.

[0071] In this example, the first cholesteric liquid crystal composition includes 74.5% by weight of small-molecule nematic liquid crystals, 8% by weight of photopolymerizable monomers (as shown below), and 12% by weight of chiral with levorotatory properties. Siloxane liquid crystal molecules, 5% by weight of a chiral additive with levorotatory properties (the structure is shown below) as the first chiral additive and 0.5% by weight of photoinitiator to make the first cholesteric liquid crystal composition The optical rotation is left-handed.

[0072] Photopolymerizable monomer

[0073]

[0074] Chiral additives

[0075]

[0076] In addition, the second cholesteric liquid crystal composition includes 12% by weight of chi...

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Abstract

The invention provides an optical compensation film and a preparation method of the optical compensation film. The preparation method of the optical compensation film comprises the steps that a first cholesteric liquid crystal composition with the levorotatory optical rotation is mixed, a second cholesteric liquid crystal composition with the dextrorotary optical rotation is mixed, and the compositions are mixed to be uniform under the room temperature to form a mixture, wherein a reflected wave position of the first cholesteric liquid crystal composition is the same as that of the second cholesteric liquid crystal composition; the mixture is heated to the glass transition temperature, and then cooling is performed; ultraviolet radiation is performed on the mixture, and therefore the optical compensation film is formed through curing. According to the optical compensation film, the red / green / blue three-primary color purity can be improved, and therefore the liquid crystal display color gamut is improved. In addition, preparation materials adopted in the preparation method are wide in source, the preparation technology is simple, and the optical compensation film can be widely applied to actual production.

Description

Technical field [0001] The present disclosure relates to the application field of liquid crystal materials, in particular to an optical compensation film with improved color gamut and a method for preparing the optical compensation film. Background technique [0002] In the liquid crystal display device, the color gamut is an index used to describe the color reproduction capability of the liquid crystal display device. The high color gamut display screen has greatly improved the color gamut range, which can show more abundant colors and have better The sense of hierarchy. Therefore, making the liquid crystal display device have a high color gamut is an important development trend of the current display screen. [0003] In the prior art, although the liquid crystal display module can achieve high color gamut, it also has the problems of weakening the display brightness of the liquid crystal panel and poor user experience. Summary of the invention [0004] In order to improve the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335C09K19/52C09K19/42
CPCG02F1/1335C09K19/42C09K19/52
Inventor 王菲菲宋平邵喜斌
Owner BOE TECH GRP CO LTD