Biosensor and biosensor array and device

Patent metadata

Field	Value
Publication number	US-11986276-B2
Application number	US-202017079868-A
Country	US
Kind code	B2
Filing date	Oct 26, 2020
Priority date	Jun 5, 2020
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

Disclosed is a biosensor including a light-emitting element, a photo-detective element, a light transmitting layer under the light-emitting element and the photo-detective element, and an optical structure inside the light transmitting layer and configured to control a propagation direction of light, a biosensor array and a device.

First claim

What is claimed is:

1. A biosensor, comprising
a light-emitting element,
a photo-detective element,
a light transmitting layer extending continuously under the light-emitting element and the photo-detective element, and
an optical structure inside the light transmitting layer, the optical structure being configured to control a propagation direction of light passing through the light transmitting layer,
wherein the optical structure and the light transmitting layer include different materials,
wherein the light transmitting layer includes a stretchable material,
wherein the light transmitting layer includes a plurality of first regions having a higher elastic modulus and a second region having a lower elastic modulus than the plurality of first regions, wherein the second region extends between adjacent first regions of the plurality of first regions,
wherein each of the plurality of first regions has an island-shape separated from each other, and
wherein each of the light-emitting element and the photo-detective element is on a separate first region of the plurality of first regions of the light transmitting layer,
wherein the optical structure includes
a first optical structure overlapping the light-emitting element in a thickness direction of the light transmitting layer,
a second optical structure overlapping the photo-detective element in the thickness direction of the light transmitting layer, and
a third optical structure between the light-emitting element and the photo-detective element and further between the first optical structure and the second optical structure within the light transmitting layer, wherein the third optical structure is at least partially located within the second region of the light transmitting layer and is configured to scatter or refract light reflected by a living body and passing through the third optical structure in at least the second region of the light transmitting layer to direct the scattered or refracted light to the photo-detective element.

2. The biosensor of claim 1 , wherein the optical structure is configured to control a propagation direction of light emitted from the light-emitting element and a propagation direction of light reflected by the living body.

3. The biosensor of claim 1 , wherein the first optical structure is configured to scatter or refract light emitted from the light-emitting element.

4. The biosensor of claim 3 , wherein the first optical structure is configured to control light emitted in a substantially vertical direction with respect to an in-plane direction of the light-emitting element to travel at an angle of greater than or equal to about 10 degrees with respect to the substantially vertical direction of the light-emitting element.

5. The biosensor of claim 3 , wherein the first optical structure comprises a microlens or a microlens array.

6. The biosensor of claim 5 , wherein an area of the microlens or the microlens array is smaller than or equal to an area of the light-emitting element.

7. The biosensor of claim 3 , wherein a refractive index of a material constituting the first optical structure is different from a refractive index of a material constituting the light transmitting layer.

8. The biosensor of claim 3 , wherein the first optical structure has pores.

9. The biosensor of claim 1 , wherein the first optical structure is configured to reflect light emitted from the light-emitting element.

10. The biosensor of claim 9 , wherein the first optical structure is configured to control reflect light emitted from the light-emitting element and to travel at an angle of less than about 60 degrees with respect to a vertical direction of the light-emitting element.

11. The biosensor of claim 9 , wherein the first optical structure has a cylindrical or truncated circular conical shape.

12. The biosensor of claim 9 , wherein the first optical structure comprises a metal.

13. The biosensor of claim 1 , wherein the first optical structure is configured to control light emitted from the light-emitting element to travel at an angle of greater than or equal to about 10 degrees and less than about 60 degrees with respect to a vertical direction of the light-emitting element.

14. The biosensor of claim 1 , wherein the third optical structure comprises a plurality of nanoparticles or porous structures.

15. A biosensor array, the biosensor array comprising a plurality of unit elements, wherein each unit element of the plurality of unit elements comprises the biosensor of claim 1 .

16. The biosensor array of claim 15 , wherein the each unit element further comprises a pressure sensor.

17. A device comprising the biosensor array of claim 15 , wherein the device is a patch type skin-attachable device or a band type skin-attachable device.

18. A device comprising the biosensor of claim 1 , wherein the device is a patch type skin-attachable device or a band type skin-attachable device.

19. A biosensor, comprising:
a light-emitting element,
a photo-detective element,
a light transmitting layer extending continuously under the light-emitting element and the photo-detective element, and
an optical structure inside the light transmitting layer, the optical structure being configured to control a propagation direction of light,
wherein the optical structure and the light transmitting layer include different materials,
wherein the light transmitting layer includes a stretchable material,
wherein the light transmitting layer includes a plurality of first regions having a higher elastic modulus and a second region having a lower elastic modulus than the plurality of first regions, wherein the second region extends between adjacent first regions of the plurality of first regions, wherein each first region and the second region are configured to transmit incident light through an entire thickness of the light transmitting layer,
wherein each of the plurality of first regions has an island-shape separated from each other, and
wherein each of the light-emitting element and the photo-detective element is on a separate first region of the plurality of first regions of the light transmitting layer,
wherein the optical structure includes
a first optical structure overlapping the light-emitting element in a thickness direction of the light transmitting layer,
a second optical structure overlapping the photo-detective element in the thickness direction of the light transmitting layer, and
a third optical structure between the light-emitting element and the photo-detective element and further between the first optical structure and the second optical structure within the light transmitting layer, wherein the third optical structure is at least partially located within the second region of the light transmitting layer and is configured to scatter or refract light reflected by a living body that is external to the biosensor such that the light is received at the biosensor from the living body in the thickness direction and is passing through the third optical structure in at least the second region of the light transmitting layer to direct the scattered or refracted light to the photo-detective element.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Gae Hwang
• Kang Hyun Bum
• Chung Jong Won
• Yun Youngjun
• LEE Yeongjun

Classifications

• A61B5/02427 Primary

  Details of sensor · CPC title

• A61B5/02438

  with portable devices, e.g. worn by the patient · CPC title

• A61B2562/0238

  Optical sensor arrangements for performing transmission measurements on body tissue · CPC title

• A61B5/021 Primary

  Measuring pressure in heart or blood vessels · CPC title

• A61B5/0059 Primary

  using light, e.g. diagnosis by transillumination, diascopy, fluorescence (photoacoustic A61B5/0093; optical measurement of heart rate A61B5/02416; optical measurement of blood flow A61B5/0261; optical measurement of analytes A61B5/1455) · CPC title