METHOD AND APPARATUS FOR PHOTOPLETHYSMOGRAPHIC SENSING
First Claim
1. A photoplethysmographic sensing system for determining a user'"'"'s pulse rate, comprising:
- a light emitting device including a first plurality of light emitting particles having a first diameter;
a detector for receiving light emitted from the plurality of light emitting particles; and
a processing device coupled to the detector for determining the pulse rate.
1 Assignment
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Accused Products
Abstract
A photoplethysmographic sensing system for determining a user'"'"'s pulse rate includes a light emitting device (100, 201, 310, 500) including a first plurality of light emitting particles (108, 208, 317) having a first diameter and emitting light having a first wavelength. A detector (118, 218, 500) is positioned to receive light emitted from the plurality of light emitting particles (108, 208, 317) and a processing device (500) determines the pulse rate. The light emitting device (100, 201, 310, 500) and the detector (118, 218, 500) are disposed on a flexible polymeric material (102, 202, 334). The light emitting device (100, 201, 310, 500) may include a second plurality of light emitting particles (108, 208, 317) having a second diameter and emitting light having a second wavelength, wherein the processing device (500) determines the user'"'"'s blood oxygen level. The light emitting particles (108, 208, 317) may comprise one of quantum dots, electroluminescent particles, or organic particles.
182 Citations
21 Claims
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1. A photoplethysmographic sensing system for determining a user'"'"'s pulse rate, comprising:
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a light emitting device including a first plurality of light emitting particles having a first diameter; a detector for receiving light emitted from the plurality of light emitting particles; and a processing device coupled to the detector for determining the pulse rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A photoplethysmographic sensing system comprising:
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a flexible material; a light emitting device disposed on the flexible material, comprising; a cathode; a electron transparent layer formed over the cathode; a first plurality of light emitting particles, each having a first diameter, disposed over the electron transport layer; a hole transport layer formed over the plurality of light emitting particles; and an anode formed over the hole transport layer; a detector for receiving light emitted from the first plurality of light emitting particles; and electronics for activating the first plurality of light emitting particles and receiving an output from the detector for determining a pulse rate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method for determining a pulse rate of a user by a photoplethysmographic sensing system, comprising:
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emitting light having a first wavelength from a plurality of light emitting particles uniformly distributed in a single, flexible emission source at a first time and a second time; receiving the light after one of passing through, or reflecting from, blood of the user; and calculating the pulse rate based on the amount of light received at the first and second times. - View Dependent Claims (20, 21)
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Specification