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Device having variable transmittance

A technology with variable transmittance, applied in optics, instruments, nonlinear optics, etc., can solve problems such as crosstalk

Active Publication Date: 2021-04-09
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the case of a device for adjusting the transmittance by applying a liquid crystal compound, polarized light higher than a certain level is mainly generated in which due to the use environment, by the road Reflected light caused by surfaces or structures, buildings, etc. has partial polarization properties, so such devices cause problems such as crosstalk phenomenon, rainbow phenomenon or mirror phenomenon

Method used

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  • Device having variable transmittance
  • Device having variable transmittance
  • Device having variable transmittance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0179] A device was fabricated using a highly stretched PET (polyethylene terephthalate) film substrate from Toyobo (SRF substrate, thickness: 80 μm, manufacturer: Toyobo, product name: TA044) as a polymer film substrate. First, an ITO (indium tin oxide) film (electrode layer) is deposited on one surface of the SRF substrate, and an alignment film is formed. After depositing the ITO film, the in-plane retardation of the applied SRF substrate was about 11,000 nm to 14,000 nm based on a wavelength of 550 nm. The alignment film was formed by rubbing a polyimide-based horizontal alignment film (SE-7492, Nissan) with a thickness of about 300 nm with a rubbing cloth, where the rubbing direction (alignment direction) and the slow axis direction of the SRF substrate were set About 20 degrees clockwise (fabrication of upper base (observer side base)). The lower substrate was fabricated in the same manner. The upper substrate and the lower substrate were arranged so that the respectiv...

Embodiment 2

[0182] A device was fabricated using a highly stretched PET (polyethylene terephthalate) film substrate from Toyobo (SRF substrate, thickness: 80 μm, manufacturer: Toyobo, product name: TA044) as a polymer film substrate. First, an ITO (indium tin oxide) film (electrode layer) is deposited on one surface of the SRF substrate, and an alignment film is formed. After depositing the ITO film, the in-plane retardation of the applied SRF substrate was about 11,000 nm to 14,000 nm based on a wavelength of 550 nm. The alignment film was formed by rubbing a polyimide-based horizontal alignment film (SE-7492, Nissan) with a thickness of about 300 nm with a rubbing cloth, where the rubbing direction (alignment direction) and the slow axis direction of the SRF substrate were set About 23 degrees clockwise (fabrication of the upper base (observer side base)). The lower substrate was fabricated in the same manner. The upper substrate and the lower substrate were arranged so that the respe...

Embodiment 3

[0191] A device was fabricated using a highly stretched PET (polyethylene terephthalate) film substrate from Toyobo (SRF substrate, thickness: 80 μm, manufacturer: Toyobo, product name: TA044) as a polymer film substrate. First, an ITO (indium tin oxide) film (electrode layer) is deposited on one surface of the SRF substrate, and an alignment film is formed. After depositing the ITO film, the in-plane retardation of the applied SRF substrate was about 11,000 nm to 14,000 nm based on a wavelength of 550 nm. The alignment film was formed by rubbing a polyimide-based horizontal alignment film (SE-7492, Nissan) with a thickness of about 300 nm with a rubbing cloth, where the rubbing direction (alignment direction) and the slow axis direction of the SRF substrate were set About 12 degrees clockwise (fabrication of the upper base (observer side base)). The lower substrate was fabricated in the same manner. The upper substrate and the lower substrate were arranged so that the respe...

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Abstract

The present application relates to a device having variable transmittance. The present application can provide a device having variable transmittance which does not give rise to such problematic phenomena as crosstalk, rainbow and mirroring while having excellent variable transmittance property, and thus can be applied to a variety of uses.

Description

technical field [0001] This application claims the benefit of priority based on Korean Patent Applications No. 10-2018-0105598 and No. 10-2018-0105600 filed on September 4, 2018, the disclosures of which are incorporated herein by reference in their entirety. [0002] The present application relates to variable transmittance devices. Background technique [0003] A device capable of changing the transmittance by using a liquid crystal compound or the like is known. For example, in Patent Document 1, a transmittance variable device using a so-called GH cell (guest host cell) in which a liquid crystal host material and a dichroic dye guest are applied is known. [0004] The use of such devices is gradually expanding, for example, these devices can be used in wearable devices, such as eyewear such as glasses or sunglasses, mobile devices, devices for virtual reality (VR) or augmented reality (AR), or vehicles windows, or appliances for outdoor applications. [0005] In the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30
CPCG02B27/0018G02F1/13725G02F1/1396G02F1/133784G02F1/133788G02F1/133634G02F2413/05G02F2413/08G02F1/133769G02F1/133528G02F1/133636G02F2202/40
Inventor 林恩政金旼俊谢尔盖·别利亚耶夫吴东炫
Owner LG CHEM LTD