# US 2014/0155724 A1 · Wearable device and a method of manufacturing the same

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- Number: US 2014/0155724 A1
- Document ID: US20140155724A1
- Status: Published application
- Kind: A1
- Application number: 14/233,036
- Filed: 2012-07-10
- Published: 2014-06-05
- Earliest claimed: 2011-07-20
- Assignees: Koninklijke Philips N.V.
- Inventors: Martin Ouwerkerk; Joanne Henriëtte Desirée Monique Westerink
- Web page: https://patentgrep.com/patent/US20140155724A1

## CPC

- A61B 5/0531: Measuring skin impedance
- A61B 5/05: Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves (measuring movement of the entire body or parts thereof A61B5/11; detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof A61B5/24)
- A61B 5/053: Measuring electrical impedance or conductance of a portion of the body
- A61B 5/681: {Wristwatch-type devices}
- A61B 5/6814: {Head}
- A61B 5/6824: {Arm or wrist}
- A61B 5/6829: {Foot or ankle}
- A61B 5/6831: {Straps, bands or harnesses}
- A61B 5/6834: {using vacuum}
- A61B 2562/164: the sensor is mounted in or on a conformable substrate or carrier
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

The present invention relates to a wearable device (10) wearable by a user for measuring skin conductance of the user (1), the wearable device comprising at least two skin conductance electrodes (12) for contacting skin (2) of the user, and an elastic material portion (14) which surrounds the skin conductance electrodes (12) and forms a material surface (16). The elastic material of the elastic material portion (14) is non-permeable for gaseous and liquid substances. The present invention further relates to a method of manufacturing such a wearable device (10).

## Claims

### Claim 1

A wearable device wearable by a user for measuring skin conductance of the user, the wearable device comprising:
at least two skin conductance electrodes for contacting skin of the user, and
an elastic material portion which surrounds the skin conductance electrodes and forms a material surface, wherein the elastic material of the elastic material portion is non-permeable for gaseous and liquid substances.

### Claim 2 (depends on 1)

The wearable device of claim 1, wherein the elastic material portion is arranged such that an air pocket is sealed off in the vicinity of the skin conductance electrodes, when the skin conductance electrodes contact the skin of the user.

### Claim 3 (depends on 1)

The wearable device of claim 1, wherein the elastic material is a polymer or rubber.

### Claim 4 (depends on 1)

The wearable device of claim 1, wherein the elastic material is a polyurethane resin mixture at a specific mixture ratio.

### Claim 5 (depends on 4)

The wearable device of claim 4, wherein the polyurethane resin mixture is made of polyetherpolypol and 4,4′-diphenylmethane diisocyanate at a ratio of about 100:40.

### Claim 6 (depends on 1)

The wearable device of claim 1, wherein the skin conductance electrodes protrude from the material surface.

### Claim 7 (depends on 6)

The wearable device of claim 6, wherein the skin conductance electrodes protrudes between 50 to 1000 micrometer from the material surface, in particular between 100 and 700 micrometer.

### Claim 8 (depends on 1)

The wearable device of claim 1, further comprising a housing portion made of a non-elastic material.

### Claim 9 (depends on 8)

The wearable device of claim 8, wherein the elastic material of the elastic material portion is a polyurethane resin mixture at a specific mixture ratio, and wherein the housing portion is made of the same polyurethane resin mixture at a different mixture ratio.

### Claim 10 (depends on 1)

The wearable device of claim 1, further comprising a skin conductance measuring unit adapted to measure the skin conductance of the user between the skin conductance electrodes.

### Claim 11 (depends on 8)

The wearable device of claim 8, wherein the skin conductance measuring unit is at least partly arranged in the housing portion.

### Claim 12 (depends on 1)

The wearable device of claim 1, wherein the elastic material has an elasticity that is sufficient to follow the shape of the wrist of the user.

### Claim 13

A method of manufacturing a wearable device wearable by a user for measuring skin conductance of the user, the method comprising:
providing at least two skin conductance electrodes for contacting skin of the user, and
forming an elastic material portion which surrounds the skin conductance electrodes and forms a material surface, wherein the elastic material of the elastic material portion is non-permeable for gaseous and liquid substances.

### Claim 14 (depends on 13)

The method of claim 13, further comprising the step of forming a housing portion made of a non-elastic material.

### Claim 15 (depends on 13)

The method of claim 13, wherein the elastic material portion is formed by injection moulding.