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Light modulation device

A technology of light modulation device and light modulation layer, applied in door/window protection device, optics, shading screen, etc., can solve problems such as light leakage, and achieve the effect of excellent optical characteristics

Pending Publication Date: 2022-04-15
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of devices applied with a honeycomb columnar pattern, there is a problem of light leakage, especially in black mode

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0143] As the first polymer film substrate and the second polymer film substrate, a stretched PET (polyethylene terephthalate) film substrate (thickness: 145 μm, manufacturer: SKC) was used to manufacture a device. The PET film substrate has an in-plane retardation of about 10000 nm to 15000 nm for light having a wavelength of 550 nm.

[0144] First, an ITO (Indium Tin Oxide) film (conductive layer) was deposited on one side of the first polymer film substrate, and then a silicone pressure-sensitive adhesive (Shinetsu, KR3700) was bar-coated on the ITO film, which was then placed on Curing was performed at about 100° C. for 100 minutes to form a pressure-sensitive adhesive layer (first substrate) having a thickness of about 10 μm.

[0145] First, an ITO (indium tin oxide) film (conductive layer) is deposited on one side of the second polymer film substrate, and spacers in the form of square spacers (pitch: 350 μm) for maintaining cell gaps are formed on the ITO film. , height...

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Abstract

The invention relates to a light modulation device. In the present application, the present application can provide a light modulation device which appropriately maintains a cell gap by appropriately controlling the shape and arrangement of spacers, and the like, and which is suitable for various applications by effectively controlling omnidirectional light leakage in a black mode, while having excellent optical characteristics, the characteristics include transmissivity variable characteristics, haze characteristics and the like.

Description

technical field [0001] The present application relates to light modulation devices. Background technique [0002] By light modulating device is meant a device capable of switching between at least two or more different states. Such devices are used, for example, in wearable devices (eyewear such as glasses or sunglasses, etc.), mobile devices, devices for virtual reality (VR) and devices for augmented reality (AR), or vehicle sunroofs, etc., Its application is gradually expanding. [0003] The light modulating device has a structure including two opposing polarizing layers 10, 20 and a light modulating layer 30 existing between the polarizing layers, such as image 3 shown in . When the film substrate is applied to a light modulation device based on such two polarizing layers, an adhesive layer such as OCA is usually applied to the light modulation device together to impart a mechanical advantage, and a spacer-type spacer can be introduced to support the light modulation d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/1333G02F1/1335G02F1/1337G02F1/1339
CPCG02B26/02G02F2202/022G02F1/13398E06B9/24G02F2202/28G02F1/133305E06B2009/2464G02F1/133377G02F1/133531G02B1/04C08L83/04G02B5/30G02B5/20G02F1/133528G02F1/13394
Inventor 金旼俊柳正善宋哲沃吴东炫金南圭金真弘金正云
Owner LG CHEM LTD