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Photochromic material for head-mounted optical display, and preparation method and application thereof

A technology for photochromic materials and optical displays, which is applied in the fields of color-changing fluorescent materials, chemical instruments and methods, optics, etc., can solve the problems of slow light response rate, complicated device, unchanged operation, etc. The effect of improving image visibility

Active Publication Date: 2021-11-19
湖北高碳光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006]Aiming at the defects of the prior art, the object of the present invention is to provide a photochromic photochromic photochromic product with fast response speed, especially in weak light or dark environment, which can quickly and spontaneously fade color The photochromic material used in the head-mounted optical display is designed to solve the slow photoresponse rate of the photochromic material used in the head-mounted optical display in the prior art, especially the need to rely on a specific light source for illumination and excitation, resulting in complicated devices , operation unchanged, etc., but the technical problems that affect the actual use effect

Method used

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  • Photochromic material for head-mounted optical display, and preparation method and application thereof
  • Photochromic material for head-mounted optical display, and preparation method and application thereof
  • Photochromic material for head-mounted optical display, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0065] The present embodiment provides a hexaarylbiimidazole-based photochromic material, which includes a hexaarylbiimidazole molecule (having the structure of HABI-1) shown in formula (1) and a polymer matrix resin. The hexaarylbiimidazole molecules in this embodiment are dispersed in the polymer matrix resin, and decompose under the irradiation of 405 nanometer ultraviolet light to form two free radicals (discoloration). Coupling, reverts to initial colorless state (fade).

[0066]

[0067] The transparent polymer material is polymethacrylate with a molecular weight of 200,000 and a molecular weight distribution of 1.2.

[0068] The hexaarylbiimidazole molecule shown in formula (1) and the polymer matrix resin polymethyl methacrylate are dissolved in chloroform to obtain a colorless transparent solution according to the mass ratio of 1:100, which can be called photochromic agent solution, the mass percent concentration of the hexaarylbiimidazole molecule is 0.05%. The ...

Embodiment 2

[0076] This embodiment provides a hexaarylbiimidazole-based photochromic material, which includes hexaarylbiimidazole molecules (having a structure of HABI-2) represented by formula (3) and a polymer matrix resin. The hexaarylbiimidazole in this example is dispersed in the polymer matrix resin, and decomposes under the irradiation of 405 nm ultraviolet light to form two free radicals. Initially colorless state.

[0077]

[0078] The transparent polymer material used is polymethacrylate with a molecular weight of 200,000 and a molecular weight distribution of 1.2.

[0079] During preparation, the hexaarylbiimidazole molecule shown in formula (3) and the polymer matrix resin polymethyl methacrylate are dissolved in chloroform to obtain a colorless transparent solution according to the mass ratio of 1:100, which can be called It is a photochromic agent solution with a concentration of 0.05% by mass. Measure the ultraviolet-visible curve of this photochromic agent solution se...

Embodiment 3

[0081] This embodiment provides a method for making a photochromic device based on the photochromic material in the above-mentioned embodiment 1, and the method for making the photochromic device includes the following steps:

[0082] In step S1, the photochromic agent solution in Example 1 is coated on the glass surface. Wherein the glass to be coated is peeled off by cleaning in advance and drying in vacuum.

[0083] In step S2, under vacuum conditions, heat at 100°C for 20 minutes, dry the glass coated with the photochromic agent, and the photochromic molecules in the photochromic agent and the polymer matrix resin are cured to form a photochromic film to obtain Photochromic device. The thickness of the photochromic film was measured to be 22 microns. To test the color changing and fading curves of this photochromic device, see Figure 4 , The fade half-life was measured to be 7.2 seconds.

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Abstract

The invention belongs to the field of head-mounted optical displays, and particularly relates to a photochromic material for a head-mounted optical display, and a preparation method and application thereof. The photochromic material comprises transparent polymer matrix resin and photochromic molecules dispersed in the polymer matrix resin, and the photochromic molecules are derivatives of hexaaryl biimidazole. When the photochromic device prepared from the photochromic material is applied to a head-mounted optical display, the image visibility of the head-mounted optical display under outdoor sunlight can be improved by utilizing the spectrum and color change caused by the reversible structure change of the photochromic material under outdoor strong light irradiation and indoor weak light environment, meanwhile, the damage of ultraviolet light to eyes is reduced, the color can be quickly and spontaneously faded especially in a weak light or dark environment, the adaptivity of the head-mounted optical display under the indoor and outdoor strong and weak light environment change is enhanced, and the autonomous light-emitting energy consumption of the head-mounted optical display can also be reduced.

Description

technical field [0001] The invention belongs to the field of head-mounted optical displays, and more particularly relates to a photochromic material for head-mounted optical displays, its preparation and application. Background technique [0002] Photochromic is often used in sunglasses or photochromic glasses, which automatically change color under strong sunlight and reduce light transmittance, thereby protecting eyes from strong light, especially ultraviolet rays. Photochromism is often reversible, so when the light is dimmed, the glasses revert to their original transparent state. [0003] This application is also applied to head-mounted optical displays such as augmented reality (Augmented Reality, AR) glasses. AR glasses are a head-mounted optical device that superimposes virtual information and the real world on the same screen through AR technology to complement each other and enhance the user's sense of reality. In outdoor environments, HMDs are significantly less...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L33/10C08K5/3445C08J5/18C09K9/02G02B27/01
CPCC08K5/3445C08J5/18C09K9/02G02B27/0172C08J2333/12C08J2333/10C09K2211/1044C09K2211/1007C08L33/12C08L33/10
Inventor 朱明强
Owner 湖北高碳光电科技有限公司
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