Search

CN-116931332-B - Dimming device

CN116931332BCN 116931332 BCN116931332 BCN 116931332BCN-116931332-B

Abstract

The invention provides a light modulation device, which comprises a first transparent base layer, a first transparent conductive layer, a light modulation layer, a second transparent conductive layer and a second transparent base layer, wherein the light modulation layer comprises dichromatic composite particles and a dispersion medium, the dichromatic composite particles comprise an inner layer and an outer layer, the inner layer is in a non-spherical symmetrical shape, the outer layer is formed by epitaxially growing a material with optical dichroism through a ligand with the surface modified by the inner layer, and the absolute value of the difference value of the refractive index of the ligand and the refractive index of the dispersion medium is smaller than 0.19. With the dimming device provided by the invention, the dimming range of the dimming device can be effectively adjusted by controlling the refractive indexes of the ligand and the dispersion medium. Meanwhile, the optical matching property of the outer layer material of the dichromatic composite particles and the dispersion medium can be further controlled by controlling the absolute value of the difference value of the refractive indexes of the ligand and the dispersion medium, so that the haze of the bright state is controlled within 5%.

Inventors

  • WANG YAO
  • GU XIAOHU
  • ZHU WEI
  • ZHANG YICHEN

Assignees

  • 江苏集萃智能液晶科技有限公司

Dates

Publication Date
20260508
Application Date
20200925

Claims (20)

  1. 1. A light modulating device comprising a first transparent base layer, a first transparent conductive layer, a light modulating layer, a second transparent conductive layer, and a second transparent base layer, wherein the light modulating layer comprises dichroic composite particles and a dispersion medium, the dichroic composite particles comprising an inner layer and an outer layer, wherein the inner layer has a shape that is not ball symmetric, the outer layer is formed by epitaxial growth of a material having optical dichroism by a surface-modified ligand of the inner layer, wherein the absolute value of the difference between the refractive index of the ligand and the refractive index of the dispersion medium is less than 0.19.
  2. 2. The light modulation device according to claim 1, wherein the ligand is an organic carboxylic acid type compound.
  3. 3. The light adjusting device according to claim 2, wherein the organic carboxylic acid compound includes pyrrole carboxylic acid compound, thiazole carboxylic acid compound, imidazole carboxylic acid compound, pyrazole carboxylic acid compound, pyridine carboxylic acid compound, pyrimidine carboxylic acid compound, quinine carboxylic acid compound, pyrazine carboxylic acid compound, phenanthroline carboxylic acid compound, and purine carboxylic acid compound.
  4. 4. The dimmer device of claim 1, wherein the dispersion medium is one or more of a polyacid ester.
  5. 5. The light dimmer device of claim 4, wherein the polybasic acid ester comprises dioctyl adipate, trioctyl trimellitate, dibutyl phthalate, diethyl phthalate, butyl benzyl phthalate, dioctyl terephthalate, di (2-ethylhexyl) phthalate, di-n-octyl phthalate, diisodecyl phthalate, diisononyl phthalate, diisobutyl phthalate, dimethyl phthalate, dicyclohexyl phthalate, diisodecyl adipate, dioctyl azelate, dioctyl sebacate, diisooctyl sebacate, triethylene glycol diisooctyl, tricresyl phosphate, triphenyl phosphate, 2-ethylhexyl diphenyl phosphate, toluene diphenyl phosphate, epoxysoybean oil, epoxyfatty acid butyl ester, epoxyfatty acid octyl ester, tri-n-butyl trimellitate, tri-n-hexyl trimellitate, triallyl 1,2, 4-benzene tricarboxylic acid, tripropyl 1,3, 4-benzene tricarboxylic acid, trimethyl 1,2, 4-benzene tricarboxylic acid, tetraoctyl tetraphenyl phthalate, benzyl 2-ethylhexyl phthalate, dibenzyl phthalate, and dibenzyl phthalate.
  6. 6. The light modulation device according to claim 1, wherein the longest axis of the dichroic composite particles has a size of 100 to 1000 nm and the shortest axis has a size of 10 to 200 nm.
  7. 7. The light modulation device according to claim 1, wherein the material of the inner layer is a metal and its compound, an inorganic nonmetallic compound, or an organic compound.
  8. 8. The light modulation device according to claim 7, wherein the inner layer is a hydroxyapatite nanorod.
  9. 9. The light modulating device of claim 2, wherein the material of the outer layer is polyhalide.
  10. 10. The light modulation device according to claim 1, wherein a mass ratio of the dichroic composite particles to the dispersion medium is 1:7 to 1:40.
  11. 11. The light modulation device according to claim 1, wherein the thickness of the light modulation layer is 5 to 50 μm.
  12. 12. The light modulating device of claim 1, wherein the light modulating layer further comprises a particulate stabilizer.
  13. 13. A light-adjusting device comprising a light-adjusting layer, wherein the light-adjusting layer comprises a dichroic composite particle and a dispersion medium, the dichroic composite particle comprises an inner layer and an outer layer, wherein the inner layer has a shape of non-spherical symmetry, the outer layer is formed by epitaxial growth of a material having optical dichroism by a ligand of surface modification of the inner layer, wherein the absolute value of the difference between the refractive index of the ligand and the refractive index of the dispersion medium is less than 0.19, The light modulation layer absorbs the incident light maximally under the state of no electric field application; when an electric field is applied, the light modulation layer absorbs less incident light.
  14. 14. The light modulation device according to claim 13, wherein the ligand is an organic carboxylic acid type compound.
  15. 15. The light adjusting device according to claim 14, wherein the organic carboxylic acid compound comprises a pyrrole carboxylic acid compound, a thiazole carboxylic acid compound, an imidazole carboxylic acid compound, a pyrazole carboxylic acid compound, a pyridine carboxylic acid compound, a pyrimidine carboxylic acid compound, a quinine carboxylic acid compound, a pyrazine carboxylic acid compound, a phenanthroline carboxylic acid compound, and a purine carboxylic acid compound.
  16. 16. The dimmer device of claim 13, wherein the dispersion medium is one or more of a polyacid ester.
  17. 17. The dimmer device of claim 16, wherein the polybasic acid ester comprises dioctyl adipate, trioctyl trimellitate, dibutyl phthalate, diethyl phthalate, butyl benzyl phthalate, dioctyl terephthalate, di (2-ethylhexyl) phthalate, di-n-octyl phthalate, diisodecyl phthalate, diisononyl phthalate, diisobutyl phthalate, dimethyl phthalate, dicyclohexyl phthalate, diisodecyl adipate, dioctyl azelate, dioctyl sebacate, diisooctyl sebacate, triethylene glycol diisooctyl phthalate, tricresyl phosphate, triphenyl phosphate, 2-ethylhexyl diphenyl phosphate, toluene diphenyl phosphate, epoxysoybean oil, epoxyfatty acid butyl ester, epoxyfatty acid octyl ester, tri-n-butyl trimellitate, tri-n-hexyl trimellitate, triallyl 1,2, 4-benzene tricarboxylic acid, tripropyl 1,3, 4-benzene tricarboxylic acid, trimethyl 1,2, 4-benzene tricarboxylic acid, tetraoctyl tetraphenyl phthalate, benzyl 2-ethylhexyl phthalate, dibenzyl phthalate, and dibenzyl phthalate.
  18. 18. The light modulation device according to claim 13, wherein the longest axis of the dichroic composite particles has a size of 100 to 1000 nm and the shortest axis has a size of 10 to 200 nm.
  19. 19. The light modulating device of claim 13, wherein the material of the inner layer is a metal and its compounds, inorganic nonmetallic compounds, or organic compounds.
  20. 20. The light modulation device according to claim 19, wherein the inner layer is a hydroxyapatite nanorod.

Description

Dimming device The application is a divisional application of an application patent application with the application number 202011024773.5 and the application name of 'light modulation device' submitted by 09/25 th 2020. Technical Field The present invention relates to a light adjusting device, and more particularly, to a light adjusting device having dichroic composite particles. Background Along with the development of technology, the dimming glass is widely applied to the fields of construction, traffic and office, and particularly, the dimming glass is more and more paid attention to the fields of automobiles, high-speed rails, airplanes and the like. The traditional dimming glass market is mature to be PDLC intelligent glass and electrochromic intelligent glass, wherein the PDLC intelligent glass can only realize transparent and haze switching and cannot realize shading and heat insulation effects, and the electrochromic intelligent glass has the problems of complex film process, slow response time (8-20 s) and the like. Another well-established technology is the SPD light valve technology, in which suspended particles are suspended in a dimming layer, and in a state where no electric field is applied, the suspended particles undergo brownian motion, thereby absorbing, scattering, or reflecting incident light, so that the SPD light valve assumes a dark state, and when an electric field is applied, the suspended particles are polarized, so that most of the incident light is aligned in a line according to the direction of the electric field, so that the SPD light valve assumes a bright state by using an over-dimming layer, as disclosed in US5650872 a. In this technique, the shape and size of the suspended particles are important for the effect in the later stages. However, due to the influence of materials and preparation processes, the shape and size of suspended particles cannot be precisely controlled. Meanwhile, the dimming range of the dimming device is single, and the bright state haze is too large to meet various requirements. Accordingly, it is desirable to provide a dimming device that not only precisely controls the size of suspended particles, but also adjusts the dimming range while reducing the bright state haze and improving the definition. Disclosure of Invention In order to solve the above problems, the present invention provides a light modulation device comprising a first transparent base layer, a first transparent conductive layer, a light modulation layer, a second transparent conductive layer, and a second transparent base layer, wherein the light modulation layer comprises dichroic composite particles and a dispersion medium, the dichroic composite particles comprise an inner layer and an outer layer, wherein the inner layer has a non-spherically symmetrical shape, the outer layer is formed by epitaxially growing a material having optical dichroism by a surface-modified ligand of the inner layer, wherein the absolute value of the difference between the refractive index of the ligand and the refractive index of the dispersion medium is less than 0.19. In a preferred embodiment, the ligand is an organic carboxylic acid. In a more preferred embodiment, the organic carboxylic acid-based compound includes pyrrole-based carboxylic acid compound, thiazole-based carboxylic acid compound, imidazole-based carboxylic acid compound, pyrazole-based carboxylic acid compound, pyridine-based carboxylic acid compound, pyrimidine-based carboxylic acid compound, quinine-based carboxylic acid compound, pyrazine-based carboxylic acid compound, phenanthroline-based carboxylic acid compound, and purine-based carboxylic acid compound. In a preferred embodiment, the dispersion medium is one or more of a polyacid ester. In a more preferred embodiment, the polyacid esters include dioctyl adipate, trioctyl trimellitate, dibutyl phthalate, diethyl phthalate, butyl benzyl phthalate, dioctyl terephthalate, di (2-ethylhexyl) phthalate, di-n-octyl phthalate, diisodecyl phthalate, diisononyl phthalate, diisobutyl phthalate, dimethyl phthalate, dicyclohexyl phthalate, diisodecyl adipate, dioctyl azelate, dioctyl sebacate, diisooctyl sebacate, triethylene glycol diisooctyl phthalate, tricresyl phosphate, triphenyl phosphate, 2-ethylhexyl diphenyl phosphate, toluene diphenyl phosphate, epoxidized soybean oil, butyl epoxy fatty acid, octyl epoxy fatty acid, tri-n-butyl trimellitate, tri-n-hexyl trimellitate, triallyl 1,2, 4-benzene tricarboxylic acid, tripropyl 1,3, 4-benzene tricarboxylic acid, trimethyl 1,2, 4-benzene tricarboxylic acid, tetraoctyl phthalate, benzyl 2-ethyl phthalate, dibenzyl phthalate, and dibenzyl phthalate. In a preferred embodiment, the longest axis of the dichroic composite particles has a size of 100 to 1000 nanometers and the shortest axis has a size of 10 to 200 nanometers. In a preferred embodiment, the material of the inner layer is a metal and its compounds, inorganic nonmetallic compounds