Preparation method of suspended particle controllable light valve

Abstract

The invention discloses a preparation method of a suspended particle controllable light valve. The light valve comprises an upper transparent electrode and a lower transparent electrode. The light valve matrix emulsion containing a polymerization precursor PPM, a suspension medium SM, light-controlled particles LCP and a photoinitiator PI is divided into two parts which are applied to the inner sides of the two transparent electrodes to form light valve matrix emulsion layers. The light valve matrix emulsion layers on the two transparent electrodes are solidified by ultraviolet UV radiation toform an upper light-controlled layer and a lower light-controlled layer. The upper transparent electrode and the upper light-controlled layer constitute an upper stacking assembly. The lower transparent electrode and the lower light-controlled layer constitute a lower stacking assembly. The upper and lower stacking assemblies are laminated together in a face-to-face manner through the upper and lower light-controlled layers to obtain a complete light control layer. The technical method of the invention reduces the thickness of the light valve matrix emulsion layer on each side to half and increases the penetration performance of UV exponentially. The curing effect of the light valve matrix can be improved, and the dark light transmittance of the light valve is reduced. Moreover, the dosage of photoinitiator in the light valve matrix emulsion can be reduced.

Description

technical field [0001] The invention relates to a suspended particle controllable light valve and a preparation method of a suspended particle controllable light valve. Background technique [0002] Technically, a light valve is a device that can regulate the amount of light passing through a medium, similar to a water valve that controls the flow of water. Curtains can be thought of as a kind of light valve. In the present invention, the light valve is a device that can electronically control the light transmittance, and this device is scientifically called an electrochromic device. Depending on the principle of the electrochromic device, it can be further classified into liquid crystal color-changing light valves, electrochemical color-changing light valves, and suspended particle light valves. [0003] Among the suspended particle light valves, the electroactive components are light control particles that can be rearranged in the electromagnetic field applied through tw...

AI Technical Summary

Problems solved by technology

And when the thickness of light valve matrix emulsion layer 1a ' increases, the light transmittance of light will be very low, cause the ratio of UV light penetrating light valve matrix emulsion layer 1a' to reduce greatly like this, seriously affect the curing effect of light valve matrix emulsion , Therefore, in order to cure efficiently, it is necessary to formulate a high concentration (1%-2% mass percentage) of photoinitiator (PI) into the light valve matrix emulsion, such as the production method described in the example of US Pat. As a result, although the light valve matrix emulsion can be efficiently cured, a large amount of photoinitiators or by-products generated by the decomposition of photoinitiators will remain in the cured light control layer 1′. It will have a negative impact on the performance of the suspended particle light valve, such as changing the color of the suspended particle light valve, causing the attenuation of the light transmission of the suspended particle light valve, shortening the service life of the suspended particle light valve, etc.

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