# US 12,001,037 B2 · Light control filter

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- Number: US 12,001,037 B2
- Document ID: US12001037B2
- Status: Granted
- Kind: B2
- Application number: 17/053,355
- Filed: 2019-05-08
- Published: 2021-07-29
- Granted: 2024-06-04
- Earliest claimed: 2018-05-10
- Assignees: Shin-Etsu Polymer Co., Ltd.
- Applicants: Shin-Etsu Polymer Co., Ltd.
- Inventors: Shinji Hotta
- Web page: https://patentgrep.com/patent/US12001037B2

## CPC

- F21V 9/40: with provision for controlling spectral properties, e.g. colour, or intensity
- G02B 5/22: Absorbing filters {(G02B5/201 - G02B5/208 take precedence)}
- G02B 5/201: {in the form of arrays}
- G02B 1/04: made of organic materials, e.g. plastics (G02B1/08 takes precedence)
- G02B 2207/123: Optical louvre elements, e.g. for directional light blocking
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A light control filter includes a sheet having a sea-island structure including a light-transmitting portion and a light-shielding portion, wherein the light-transmitting portion and the light-shielding portion each extend from a first principal surface to a second principal surface, wherein any one of the light-transmitting portion and the light-shielding portion forms a plurality of island portions configured to penetrate through the sheet from the first principal surface to the second principal surface, and another of the light-transmitting portion and the light-shielding portion forms a sea portion configured to separate the plurality of island portions from one another, and wherein the sea portion has an MD-1 rubber hardness of 25 or more and 80 or less.

## Claims

### Claim 1

A light control filter, comprising a sheet having a sea-island structure including a light-transmitting portion and a light-shielding portion,
wherein the light-transmitting portion and the light-shielding portion each extend from a first principal surface to a second principal surface,
wherein the light-transmitting portion forms a plurality of island portions configured to penetrate completely through the sheet from the first principal surface to the second principal surface, and the light-shielding portion forms a sea portion configured to separate the plurality of island portions from one another,
wherein the sea portion has an MD-1 rubber hardness of 25 or more and 80 or less,
wherein the sea portion includes 50 mass % or more of a silicone rubber with respect to a total mass of the sea portion,
wherein an aspect ratio between a size of each of the plurality of island portions in plan view of the sheet and a height of each of the plurality of island portions in a thickness direction of the sheet is from 1:8.5 to 1:25.5,
wherein a size of each of the plurality of island portions in plan view of the sheet is 5 μm or more and 50 μm or less,
wherein a three-dimensional shape of each of the plurality of island portions in the sheet is a columnar shape,
wherein the plurality of island portions are arranged in a two-dimensional array in plan view of the sheet, and
wherein the light control filter can be handled in a form of a single layer as a single light control filter, and a support layer configured to maintain the mechanical strength of the light control filter is not required.

### Claim 2 (depends on 1)

The light control filter according to claim 1, wherein the plurality of island portions are each hollow.