APPARATUS AND METHOD FOR MEASURING HEARTBEAT/STRESS IN MOBILE TERMINAL
First Claim
1. A circuit in a mobile terminal for measuring heartbeat/stress, the circuit comprising:
- a photoplethysmography (PPG) sensor having first and second green light-emitting diodes (LEDs);
first and second LED drivers respectively connected to the first and second green LEDS and respectively configured to drive the first and second green LEDs; and
a processor configured to;
control the first and second LED drivers to alternately turn on the first and second green LEDs within one driving period to respectively produce first and second PPG signals, andmeasure a user'"'"'s heartbeat/stress using the first and second PPG signals that have a corresponding signal quality equal to or greater than a predetermined threshold.
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Accused Products
Abstract
A circuit in a mobile terminal for measuring heartbeat/stress. The circuit includes a photoplethysmography (PPG) sensor having first and second green light-emitting diodes (LEDs); first and second LED drivers respectively connected to the first and second green LEDS and respectively configured to drive the first and second green LEDs; and a processor configured to control the first and second LED drivers to alternately turn on the first and second green LEDs within one driving period to respectively produce first and second PPG signals, and measure a user'"'"'s heartbeat/stress using the first and second PPG signals that have a corresponding signal quality equal to or greater than a predetermined threshold.
48 Citations
20 Claims
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1. A circuit in a mobile terminal for measuring heartbeat/stress, the circuit comprising:
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a photoplethysmography (PPG) sensor having first and second green light-emitting diodes (LEDs); first and second LED drivers respectively connected to the first and second green LEDS and respectively configured to drive the first and second green LEDs; and a processor configured to; control the first and second LED drivers to alternately turn on the first and second green LEDs within one driving period to respectively produce first and second PPG signals, and measure a user'"'"'s heartbeat/stress using the first and second PPG signals that have a corresponding signal quality equal to or greater than a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A circuit in a mobile terminal for measuring heartbeat/stress, the circuit comprising:
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a photoplethysmography (PPG) sensor configured to detect PPG signals of first and second channels by operating first and second green light-emitting diodes (LEDs) at each driving period; and a processor configured to measure a user'"'"'s heartbeat/stress by analyzing the PPG signals of the first and second channels detected by the PPG sensor, wherein the PPG sensor includes a buffer configured to store the detected PPG signals of the first and second channels, and wake up the processor when an amount of the PPG signals of the first and second channels stored in the buffer reaches a threshold value. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method of controlling a mobile terminal for measuring heartbeat/stress, the method comprising:
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detecting, via a photoplethysmography (PPG) sensor having first and second green light-emitting diodes (LEDs), first and second PPG signals by alternately turning on the first and second green LEDs within one driving period; and measuring, via a processor, a user'"'"'s heartbeat/stress using the first and second PPG signals that have a corresponding signal quality equal to or greater than a predetermined threshold. - View Dependent Claims (20)
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Specification