Optical sensor module and a wearable device including the same

Patent metadata

Field	Value
Publication number	US-10690538-B2
Application number	US-201715434298-A
Country	US
Kind code	B2
Filing date	Feb 16, 2017
Priority date	Feb 19, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

An optical sensor module includes a support unit, a light-receiving unit and a light-emitting unit. The support unit includes a main plate, and a side plate inclined relative to the main plate. The light-receiving unit includes a photodetector disposed on the main plate and having a light-receiving surface located away from the main plate, and a light-blocking member covering part of the photodetector. The light-emitting unit emits light toward an imaginary line perpendicular to the light-receiving surface, and is disposed on the side plate. A wearable device including the optical sensor is also disclosed.

First claim

What is claimed is:

1. An optical sensor module, comprising:
a support unit having a main plate and at least one side plate, said at least one side plate including a plurality of bendable bridge portions and a plurality of body portions respectively connected to said bridge portions, said bridge portions being bent to dispose said body portions laterally displaced from and inclined relative to said main plate;
a light-receiving unit having a photodetector that is disposed on a top of said main plate and that has a light-receiving surface located away from said main plate, and a first light-blocking member, said photodetector being disposed inside said first light-blocking member; and
at least one light-emitting unit disposed on at least one of said body portions of said at least one side plate, and having at least one light source that has a light-emitting surface;
wherein said optical sensor module defines an imaginary line perpendicular to said light-receiving surface, said at least one light source emitting light toward the imaginary line;
wherein a portion of said first light-blocking member is disposed between said at least one light source and said photodetector; and
wherein said body portions are disposed outside of said first light-blocking member of said light-receiving unit, said bridge portions projecting outwardly from said first light-blocking member, said body portions thereby connecting respectively with said bridge portions outside of said first light-blocking member, said bridge portions being bent outside of said first light-blocking member to dispose said body portions to be inclined relative to said main plate.

2. The optical sensor module as claimed in claim 1 , wherein said support unit includes two of said at least one side plates that are respectively disposed adjacent to two opposite lateral sides of said main plate, and wherein said optical sensor module includes two of said at least one light-emitting units respectively disposed on said side plates.

3. The optical sensor module as claimed in claim 1 , wherein said at least one light-emitting unit includes a light-transmissible encapsulant encapsulating said at least one light source, and a second light-blocking member surrounding said light-transmissible encapsulant and said at least one light source, said second light-blocking member having an aperture registered with said light-emitting surface of said at least one light source, said light-transmissible encapsulant having a top surface exposed from said aperture.

4. The optical sensor module as claimed in claim 3 , wherein said at least one light-emitting unit includes a lens disposed on said top surface of said light-transmissible encapsulant.

5. The optical sensor module as claimed in claim 1 , wherein said light-receiving unit includes a light-transmissible member encapsulating said photodetector, and being surrounded by said first light-blocking member, said first light-blocking member having an opening registered with said light-receiving surface of said photodetector, said light-transmissible member having a top surface exposed from said opening of said first light-blocking member.

6. The optical sensor module as claimed in claim 1 , wherein said main plate includes two spaced-apart main portions, said photodetector being disposed on one of said main portions, each said at least one side plate including two of said body portions spaced apart from one another and two of said bridge portions that are respectively connected to said body portions.

7. The optical sensor module as claimed in claim 6 , wherein said main plate includes two spaced-apart first leg portions respectively extending from said main portions and exposed outwardly of two opposite ends of said first light-blocking member in a lengthwise direction, each said at least one side plate including two spaced-apart second leg portions respectively connected with said bridge portions and exposed outwardly of said two opposite ends of said first light-blocking member along the lengthwise direction, wherein said first leg portions and said second leg portions are electrically isolated from each other.

8. The optical sensor module as claimed in claim 7 , wherein each of said bridge portions of said at least one side plate is formed with a cut-off at an end that a corresponding one of said second leg portions extends from and intersects therewith.

9. The optical sensor module as claimed in claim 1 , wherein said photodetector includes two opposite side surfaces, one of said opposite side surfaces being spaced apart from and facing said at least one side plate, said at least one light-emitting unit having a geometric center and defining a normal line normal to said light-emitting surface, and
D 2 tan θ<D 1 /2, where D 2 represents a distance between said light-receiving surface and an outer predetermined reflection surface, θ represents an included angle between the normal line and the imaginary line, and D 1 denotes a distance between said geometric center of said at least one light-emitting unit and one of said opposite side surfaces of said photodetector.

10. The optical sensor module as claimed in claim 1 , wherein said at least one light source has a wavelength between 510 nm and 550 nm.

11. The optical sensor module as claimed in claim 1 , wherein said at least one light source has a wavelength between 560 nm and 600 nm.

12. A wearable device to be worn by a user for measuring photoplethysmography signals from the user, comprising:
a housing including a housing body having a transparent cover for contacting with the user's skin, and a wearing member connected to said housing body and configured to be worn by the user;
a circuit board disposed in said housing body; and
an optical sensor module mounted on said circuit board and located between said transparent cover and said circuit board, said optical sensor module including:
a support unit having a main plate and at least one side plate, said at least one side plate including a plurality of bendable bridge portions and a plurality of body portions respectively connected to said bridge portions, said bridge portions being bent to dispose said body portions laterally displaced from and inclined relative to said main plate;
a light-receiving unit having a photodetector that is disposed on a top of said main plate and that has a light-receiving surface located away from said main plate, and a first light-blocking member, said photodetector being disposed inside said first light-blocking member; and
at least one light-emitting unit disposed on at least one of said body portions of said at least one side plate, and having at least one light source that has a light-emitting surface;

wherein said optical sensor module defines an imaginary line perpendicular to said light-receiving surface, said at least one light source emitting light toward the imaginary line;
wherein a portion of said first light-blocking member is disposed between said at least one light source and said photodetector; and
wherein said body portions are disposed outside of said first light-blocking member of said light-receiving unit, said bridge portions projecting outwardly from said first light-blocking member, said body portions thereby connecting respectively with said bridge portions outside of said first light-blocking member, said bridge portions being bent outside of said first light-blocking member to dispose said body portions to be inclined relative to said main plate.

13. The wearable device as claimed in claim 12 , wherein said photodetector includes two opposite side surfaces, one of said opposite side surfaces being spaced apart fr

Assignees

• Lite On Opto Tech Changzhou Co Ltd
• Lite On Tech Corp

Inventors

• Lin Chen-Hsiu

Classifications

• H10W90/00

  Package configurations · CPC title

• H10F77/40

  Optical elements or arrangements (surface textures H10F77/70) · CPC title

• G01J1/06

  Restricting the angle of incident light · CPC title

• A61B5/681 Primary

  Wristwatch-type devices · CPC title

• G01J1/0271

  Housings; Attachments or accessories for photometers · CPC title