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Gray-tone light valve and application thereof

A technology of light valves and keynotes, applied in optics, nonlinear optics, instruments, etc., can solve the problems of limited nanoparticle light valve device application, development obstacles, and restriction of customer choice motivation, etc., to achieve good application prospects and good technical effects Effect

Active Publication Date: 2021-06-01
ZHEJIANG JINGYI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, some people don't like this cool tone, but prefer other midtones. However, in the existing technology, the dark state of the suspended particle light valve is basically blue, which poses a threat to its further development. This not only limits the motivation of customers to choose, but also limits the application of light valve devices containing nanoparticles in more technical fields.

Method used

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  • Gray-tone light valve and application thereof
  • Gray-tone light valve and application thereof
  • Gray-tone light valve and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] Preparation of gray solid particles

[0125] Iodine (component A), metal halides (component B), nitrogen-containing heterocyclic carboxylic acid or ester (component C), and modified cellulose (component D);

[0126] The feeding mass ratio of each component is A component: B component: C component: D component is 1.5:1.0:1.0:1.6.

[0127]Add 30 grams of isoamyl acetate solution containing 21.2wt% nitrocellulose (1 / 4sec ​​SS) to a 250 milliliter three-necked round bottom glass flask, 6 grams of I 2 , 70 g isoamyl acetate, 3.9 g anhydrous PbI 2 , and heated to 42°C. Wait I 2 After dissolving, add 6 g of n-propanol, 0.8 g of distilled water, and 4 g of 2,5-pyrazinedicarboxylic acid dihydrate into a three-necked round-bottomed glass flask. The reaction was heated and stirred at 42° C. for 4 hours, and then cooled naturally.

[0128] The reaction solution was centrifuged at 1350G for 0.5 hour to remove large particulate products. The supernatant was centrifuged at 18000...

Embodiment 2

[0134] Preparation of black solid particles

[0135] According to the method of [Example 1], only with 5.0 grams of anhydrous CdI 2 , instead of 3.9 g of anhydrous PbI 2 , heated and stirred at 46° C. for 2 hours, and the mass ratio of each component was A component: B component: C component: D component was 1.5: 1.25: 1.0: 1.57.

[0136] SEM characterization results show that the black solid particles have a particle length of 365 nm, a particle width of 68 nm, and a particle aspect ratio of 5.4. The resulting suspension of black solid particles is called LCP-2.

Embodiment 3

[0138] Preparation of gray solid particles

[0139] According to the method of [Example 1], only 6 grams of isopropanol is used instead of 6 grams of n-propanol, and the reaction is heated and stirred at 50 ° C for 3 hours, and the mass ratio of each component is A component: B component: C Component: D component is 1.5:0.975:1.0:1.57.

[0140] SEM characterization results show that the gray solid particles have a particle length of 303 nm, a particle width of 52 nm, and a particle aspect ratio of 5.8. The resulting suspension of gray solid particles (referred to as LCP-3).

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Abstract

The invention provides a gray-tone light valve. The light valve has a gray tone in a dark state and is transparent in a bright state. The gray tone is as follows: in CIELab color coordinates, L is greater than 20 and less than 45, a is greater than -0.5 and less than 1.5, and b is greater than -2.5 and less than 2.5. The invention provides the light valve with a specific gray tone, the dark state of the light valve is gray, the bright state of the light valve is transparent, and the light valve has a middle tone-gray tone. The selectivity of the light valve is improved, and the application depth and width of the light valve are further widened.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 202011608787.1 and the title of the invention "A Gray-tone Light Valve and Its Application" filed with the China Patent Office on December 30, 2020, the entire contents of which are incorporated herein by reference In this application. technical field [0002] The invention belongs to the technical field of light valves, and relates to a gray tone light valve and its application. Background technique [0003] A light valve is a device that can adjust the transmittance of light passing through itself, also collectively known as a light-adjustable film, which is a smart film. The traditional dimming film directly sticks the film on the glass, and then passes through the voltage to make the dimming film appear penetrating and foggy, which realizes people's dual requirements for glass penetration and privacy protection. Even when it is opaque, the lighting is still good , w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1516G02F1/1523
CPCG02F1/15165G02F1/1523
Inventor 赵世勇李亚男张达玮肖淑勇张昱喆梁斌
Owner ZHEJIANG JINGYI NEW MATERIAL TECH CO LTD
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