PHYSIOLOGICAL DETECTION SYSTEM WITH ADJUSTABLE SIGNAL SOURCE AND OPERATING METHOD THEREOF

• US 20170042484A1
• Filed: 08/13/2015
• Published: 02/16/2017
• Est. Priority Date: 08/13/2015
• Status: Active Grant

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: CHONG, SHEAU-FOONG, Chen, Chun-Wei
• Granted Patent: US 10,244,987 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence

Abstract

A physiological detection system including a light source module, a photo sensor and a processor is provided. The light source module is configured to provide light to illuminate a skin region. The photo sensor is configured to detect emergent light passing the skin region with at least one signal source parameter and output an image signal. The processor is configured to calculate a confident level according to the image signal to accordingly adjust the at least one signal source parameter.

Claims

1. A physiological detection system comprising:

a physiological detection module comprising;

a light source module configured to provide light to illuminate a skin region;

a photo sensor configured to detect emergent light passing the skin region with at least one signal source parameter and output an image signal, and

a first processor configured to calculate a first confident level according to the image signal and update the at least one signal source parameter according to the first confident level.

2. The physiological detection system as claimed in claim 1, wherein the first confident level comprises at least one of an average brightness value and uniformity.

3. The physiological detection system as claimed in claim 1, wherein the at least one signal source parameter is selected from a group consisting of an exposure time, a gain value, a window of interest, a focus length and a light receiving phase.

4. The physiological detection system as claimed in claim 1, wherein an emission wavelength of the light source module is between 300 nm and 940 nm.

5. The physiological detection system as claimed in claim 1, wherein the at least one signal source parameter is further configured to control a light emitting intensity of the light source module.

6. The physiological detection system as claimed in claim 1, wherein the physiological detection module further comprises a transmission interface,

the first processor is further configured to generate an intensity variation signal according to a plurality of image signals, and

the transmission interface is configured to output the intensity variation signal.

7. The physiological detection system as claimed in claim 6, wherein the physiological detection system further comprises an application module coupled to the physiological detection module, and the application module comprises a second processor configured to calculate physiological characteristics according to the intensity variation signal.

8. The physiological detection system as claimed in claim 6, wherein the physiological detection system further comprises an application module coupled to the physiological detection module, and the application module comprises a second processor configured to calculate a second confident level according to the intensity variation signal and update the at least one signal source parameter according to the second confident level.

9. The physiological detection system as claimed in claim 8, wherein the second confident level comprises at least one of a PPG signal amplitude and a signal to noise ratio.

10. The physiological detection system as claimed in claim 7, wherein the application module is selected from a group consisting of a portable electronic device, a wearable electronic device, a home appliance, a vehicle device and a medical device.

11. An operating method of a physiological detection system, the physiological detection system comprising a physiological detection module, the operating method comprising:

detecting, by the physiological detection module, emergent light from a skin region with at least one signal source parameter to generate an image signal;

calculating, by the physiological detection module, a confident level according to the image signal;

comparing, by the physiological detection module, the confident level with at least one threshold; and

updating, by the physiological detection module, the at least one signal source parameter according to a comparison result of comparing the confident level and the at least one threshold.

12. The operating method as claimed in claim 11, wherein the confident level comprises at least one of an average brightness value and uniformity.

13. The operating method as claimed in claim 11, wherein the at least one signal source parameter is selected from a group consisting of an exposure time, a gain value, a window of interest, a focus length and a light receiving phase.

14. The operating method as claimed in claim 11, further comprising:

generating, by the physiological detection module, an intensity variation signal according to a plurality of image signals; and

outputting, by the physiological detection module, the intensity variation signal.

15. The operating method as claimed in claim 14, wherein the physiological detection system further comprises an application module coupled to the physiological detection module, and the operating method further comprises:

receiving the intensity variation signal with the application module; and

calculating, by the application module, physiological characteristics according to the intensity variation signal.

16. An operating method of a physiological detection system, the physiological detection system comprising a physiological detection module and an application module coupled to each other, the operating method comprising:

detecting, by the physiological detection module, emergent light from a skin region with at least one signal source parameter to generate an image signal;

calculating, by the physiological detection module, a first confident level according to the image signal;

outputting, by the physiological detection module, an intensity variation signal according to a plurality of image signals;

calculating, by the application module, a second confident level according to the intensity variation signal; and

updating the at least one signal source parameter according to the first confident level and the second confident level.

17. The operating method as claimed in claim 16, wherein the first confident level comprises at least one of an average brightness value and uniformity, and the second confident level comprises at least one of a PPG signal amplitude and a signal to noise ratio.

18. The operating method as claimed in claim 16, wherein the at least one signal source parameter is selected from a group consisting of an exposure time, a gain value, a window of interest, a focus length and a light receiving phase.

19. The operating method as claimed in claim 16, further comprising:

calculating, by the application module, physiological characteristics according to the intensity variation signal.

20. The operating method as claimed in claim 16, further comprising:

adjusting a light emitting intensity of a light source module of the physiological detection module according to the at least one signal source parameter.