Optical distance measurement system and operation method thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-005/1455
A61B-005/00
G06F-003/042
출원번호
US-0613664
(2012-09-13)
등록번호
US-9204843
(2015-12-08)
우선권정보
TW-100142235 A (2011-11-18)
발명자
/ 주소
Gu, Ren-Hau
Liao, Chi-Chieh
Kao, Ming-Tsan
Huang, Sen-Huang
출원인 / 주소
PIXART IMAGING INC.
대리인 / 주소
Hauptman Ham, LLP
인용정보
피인용 횟수 :
2인용 특허 :
5
초록▼
There is provided an operation method of an optical distance measurement system including a first mode and a second mode. The first mode is configured to detect a finger distance. The second mode is configured to detect a physiological characteristic, wherein the optical distance measurement system
There is provided an operation method of an optical distance measurement system including a first mode and a second mode. The first mode is configured to detect a finger distance. The second mode is configured to detect a physiological characteristic, wherein the optical distance measurement system transfers from the first mode to the second mode when the finger distance is within a predetermined range. There is further provided an optical distance measurement system.
대표청구항▼
1. An optical distance measurement system configured to detect a finger distance of a finger of a user from the optical distance measurement system and a physiological characteristic of the user, the optical distance measurement system comprising: a first light source configured to provide light of
1. An optical distance measurement system configured to detect a finger distance of a finger of a user from the optical distance measurement system and a physiological characteristic of the user, the optical distance measurement system comprising: a first light source configured to provide light of a first wavelength to the finger;a second light source configured to provide light of a second wavelength to the finger;a light control unit configured to control on-states of the first light source and the second light source;an image sensor configured to receive reflected light from the finger at a sampling frequency to generate a plurality of first image frames corresponding to the on-states of the first light source and a plurality of second image frames corresponding to the on-states of the second light source; anda processing unit configured to calculate the finger distance and a finger motion of the finger according to the first image frames or the second image frames, andcalculate the physiological characteristic according to the first image frames and the second image frames when the finger distance is within a predetermined range, whereinthe finger motion is not calculated when the finger distance is within the predetermined range. 2. The optical distance measurement system as claimed in claim 1, wherein when the finger distance is within the predetermined range, the processing unit is configured to divide each of the first image frames into at least two parts and calculate an average brightness of each part, and analyze the average brightness of the each part of the first image frames to obtain a first intensity variation;divide each of the second image frames into at least two parts and calculate an average brightness of each part, and analyze the average brightness of the each part of the second image frames to obtain a second intensity variation; andcalculate the physiological characteristic according to the first intensity variation and the second intensity variation. 3. The optical distance measurement system as claimed in claim 2, wherein the processing unit is further configured to calculate a heart rate according to a comparison of at least one pulse threshold with at least one of the first intensity variation and the second intensity variation. 4. The optical distance measurement system as claimed in claim 1, wherein the physiological characteristic comprises a blood oxygenation and a heart rate. 5. The optical distance measurement system as claimed in claim 1, wherein when the finger distance is within the predetermined range, the light control unit is configured to alternatively enable the on-states of the first light source and the second light source such that the image sensor receives the reflected light associated with the first light source and the second light source alternatively; orthe light control unit is configured to simultaneously enable the on-states of the first light source and the second light source such that the image sensor receives the reflected light associated with the first light source and the second light source simultaneously, and the image sensor comprises an optical filter covering at least a part of a sensing surface thereof. 6. The optical distance measurement system as claimed in claim 1, wherein the first light source, the second light source, the light control unit, the image sensor and the processing unit are packaged as a control chip to output the finger distance and the physiological characteristic processed by at least one of an encoding process, a sequential process and a compressing process. 7. The optical distance measurement system as claimed in claim 1, wherein the processing unit is configured to calculate the finger motion when the finger distance is not within the predetermined range. 8. The optical distance measurement system as claimed in claim 1, wherein the light control unit is configured to enable the on-states of one of the first light source and the second light source when the finger distance is not within the predetermined range. 9. The optical distance measurement system as claimed in claim 1, wherein the image sensor comprises a pixel array or a plurality of sensing pixels separated apart configured to detect the reflected light from the finger. 10. The optical distance measurement system as claimed in claim 1, wherein the processing unit is further configured to compensate errors caused by temperature variations. 11. An operation method of an optical distance measurement system, comprising: detecting a finger distance of a finger of a user from the optical distance measurement system and a finger motion of the finger in a first mode; anddetecting a physiological characteristic of the user in a second mode,wherein the optical distance measurement system transfers from the first mode to the second mode when the finger distance is within a predetermined range and the finger motion is not detected when the finger distance is within the predetermined range. 12. The operation method as claimed in claim 11, wherein the second mode further comprises: providing light of a first wavelength and a second wavelength to a finger surface of the finger;receiving, by an image sensor, reflected light of the first wavelength to generate a plurality of first image frames and receiving reflected light of the second wavelength to generate a plurality of second image frames;dividing each of the first image frames and each of the second image frames into at least two parts and calculating an average brightness of each part;analyzing the average brightness of the each part of the first image frames to obtain a first intensity variation and analyzing the average brightness of the each part of the second image frames to obtain a second intensity variation; andcalculating the physiological characteristic according to the first intensity variation and the second intensity variation. 13. The operation method as claimed in claim 12, further comprising: calculating a heart rate according to a comparison of at least one pulse threshold with at least one of the first intensity variation and the second intensity variation. 14. The operation method as claimed in claim 11, further comprising: showing the physiological characteristic by a response unit; andgenerating a warning state when the physiological characteristic exceeds a predetermined value. 15. The operation method as claimed in claim 11, wherein the first mode further comprises: illuminating a finger surface of the finger;receiving reflected light from the finger surface to generate a plurality of image frames; andcalculating the finger distance according to an intensity distribution of the image frames. 16. The operation method as claimed in claim 15, further comprising: detecting the finger motion according to an intensity variation of the image frames. 17. The operation method as claimed in claim 11, further comprising: performing at least one of an encoding process, a sequential process and a compressing process on the finger distance or the physiological characteristic. 18. An operation method of an optical distance measurement system, comprising: providing light of a first wavelength or a second wavelength to a finger surface of a finger;receiving reflected light of the first wavelength or the second wavelength to generate a plurality of image frames;calculating a finger distance of the finger from the optical distance measurement system according to an intensity distribution of the image frames; andperforming the following steps when the finger distance is within a predetermined range: providing light of the first wavelength and the second wavelength to the finger surface;receiving, by an image sensor, reflected light of the first wavelength to generate a plurality of first image frames and receiving reflected light of the second wavelength to generate a plurality of second image frames;dividing each of the first image frames and each of the second image frames into at least two parts and calculating an average brightness of each part;analyzing the average brightness of the each part of the first image frames to obtain a first intensity variation and analyzing the average brightness of the each part of the second image frames to obtain a second intensity variation; andcalculating a blood oxygenation according to the first intensity variation and the second intensity variation. 19. The operation method as claimed in claim 18, wherein, when the finger distance is within the predetermined range, the operation method further comprises: calculating a heart rate according to a comparison of at least one pulse threshold with at least one of the first intensity variation and the second intensity variation. 20. The operation method as claimed in claim 19, further comprising: showing, by a response unit, at least one of the blood oxygenation and the heart rate; andgenerating a warning state when the blood oxygenation or the pulse rate exceeds a predetermined value. 21. The operation method as claimed in claim 18, further comprising: detecting a finger motion of the finger according to an intensity variation of the image frames.
Monfre, Stephen L.; Blank, Thomas B.; Hazen, Kevin H.; Abul-Haj, Alan; Ruchti, Tim; Henderson, James Ryan; Stippick, Tim; Abul-Haj, Roxanne, Noninvasive targeting system method and apparatus.
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