# US 11,442,325 B2 · Article including a non-light-emitting variable transmission device and a coating

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- Number: US 11,442,325 B2
- Document ID: US11442325B2
- Status: Granted
- Kind: B2
- Application number: 16/181,848
- Filed: 2018-11-06
- Published: 2019-05-09
- Granted: 2022-09-13
- Earliest claimed: 2017-11-06
- Assignees: Sage Electrochromics, Inc.
- Applicants: Sage Electrochromics, Inc.
- Inventors: Julien Orillard; Alexandre Richard; Paul Mogensen; Nicolas Antoine Mercadier; Henry Kelley; Mathew Bowser
- Web page: https://patentgrep.com/patent/US11442325B2

## CPC

- G02B 5/285: {comprising deposited thin solid films (G02B5/281 - G02B5/289 take precedence; multilayered film filters for fibre optic multiplexing G02B6/29361)}
- C03C 17/23: Oxides (C03C17/02 takes precedence)
- C03C 17/3435: {comprising a nitride, oxynitride, boronitride or carbonitride}
- C03C 17/36: at least one coating being a metal
- C03C 17/3644: {the metal being silver}
- C03C 17/3649: {made of metals other than silver}
- C03C 17/3655: {the multilayer coating containing at least one conducting layer}
- C03C 17/3657: {the multilayer coating having optical properties}
- C03C 17/3668: {the multilayer coating having electrical properties}
- C03C 17/3681: {the multilayer coating being used in glazing, e.g. windows or windscreens}
- C03C 17/42: at least one coating of an organic material and at least one non-metal coating
- G02B 5/286: {having four or fewer layers, e.g. for achieving a colour effect}
- G02F 1/157: Structural association of cells with optical devices, e.g. reflectors or illuminating devices
- C03C 2217/212: TiO2
- C03C 2217/94: Transparent conductive oxide layers [TCO] being part of a multilayer coating
- C03C 2217/944: Layers comprising zinc oxide
- C03C 2217/948: Layers comprising indium tin oxide [ITO]
- C03C 2218/365: Coating different sides of a glass substrate
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

An article can include a non-light-emitting, variable transmission device and a coating disposed between the non-light-emitting, variable transmission device and an ambient outside the article. In an embodiment, the article has a ΔE of at most 6.5. In another embodiment, the coating includes a plurality of layers including a first layer having a refractive index of at least 2.2 and a thickness of at least 10 nm. The coating can be used to help reduce color differences seen when the non-light-transmitting, variable transmission device is taken to different transmission states. In a particular embodiment, the coating can provide a good balance between color difference and luminous transmission.

## Claims

### Claim 1

An article comprising:
a non-light-emitting, variable transmission device; and
a coating disposed between the non-light-emitting, variable transmission device and an ambient outside the article, wherein the coating comprises a plurality of layers including a first layer and a second layer, wherein the first layer has a refractive index of at least 2.2 and the second layer has a refractive index of at most 1.7, wherein the coating is on a same pane as the non-light-emitting, variable transmission device, wherein the article is a laminate,
wherein the article has a color difference delta E (ΔE) of at most 6.5, wherein:
ΔE=(L*212+a*212+b*212)0.5,
ΔE>0,
L*21 is the difference in L* when the article is in its lowest transmission state minus L* when the article is in its highest transmission state,
a*21 is the difference in a* when the article is in its lowest transmission state minus a* when the article is in its highest transmission state,
b*21 is the difference in b* when the article is in its lowest transmission state minus b* when the article is in its highest transmission state,
measurements for L*, a*, and b* are taken along the same side of the article as the outer surface.

### Claim 2 (depends on 1)

The article of claim 1, wherein ΔE is in a range of 2.0 to 5.5.

### Claim 3 (depends on 2)

The article of claim 2, wherein when the article is in its highest transmission state, luminous transmission is in a range of 40% to 60%.

### Claim 4 (depends on 2)

The article of claim 2, wherein the first layer has a thickness of at least 10 nm.

### Claim 5 (depends on 1)

The article of claim 1, wherein the first layer has a thickness of at most 50 nm.

### Claim 6 (depends on 1)

The article of claim 1, wherein the second layer has a thickness of at least 11 nm and the second layer has a thickness of at most 50 nm.

### Claim 7 (depends on 1)

The article of claim 1, wherein a substrate is between the coating and the non-light-emitting, variable transmission device.

### Claim 8 (depends on 1)

The article of claim 1, wherein an interlayer is between the coating and the non-light-emitting, variable transmission device.