Multifunctional Infrared Module
First Claim
1. A multifunctional infrared (IR) module comprising:
- an IR light-emitting diode (LED) having an anode and a cathode;
a first resistor having a first end connected to the cathode of the IR LED;
a first transistor, wherein a drain of the first transistor is connected to a second end of the first resistor, and a source of the first transistor is grounded; and
an IR receiver having an output,wherein the anode of the IR LED, a gate of the first transistor, and the IR receiver are communicatively coupled to a computing device, and the computing device is configured to receive a signal from the multifunctional IR module based on the output of the IR receiver.
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Accused Products
Abstract
A multifunctional infrared (IR) module is configured for multiple IR applications without an additional microcontroller to be integrated into a computing device and is able to utilize voltage control instead of current control. The multifunctional IR module includes an IR light emitting diode (LED), and an IR receiver (e.g., photodiode or phototransistor). In one embodiment, the multifunctional IR module includes a resistor that is connected to the cathode of the IR LED and the drain of a transistor, with the source of the transistor grounded. In some embodiments, the multifunctional IR module additionally includes a red LED. Various configurations of the multifunctional IR module are able to perform one or more of the following functions: IR in (receiving IR signals), IR out (generating IR signals), heart rate sensing, SpO2 (oxygen saturation) sensing, distance/proximity detection, gesture detection, LED control, and ambient light detection.
2 Citations
20 Claims
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1. A multifunctional infrared (IR) module comprising:
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an IR light-emitting diode (LED) having an anode and a cathode; a first resistor having a first end connected to the cathode of the IR LED; a first transistor, wherein a drain of the first transistor is connected to a second end of the first resistor, and a source of the first transistor is grounded; and an IR receiver having an output, wherein the anode of the IR LED, a gate of the first transistor, and the IR receiver are communicatively coupled to a computing device, and the computing device is configured to receive a signal from the multifunctional IR module based on the output of the IR receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A multifunctional IR module comprising:
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an IR LED having an anode and a cathode; a first transistor having a drain connected to the cathode of the IR LED, a source connected to ground, and a gate configured to receive logic signals from a computing device; an IR photodiode having an anode and a cathode; a second transistor having a drain configured to send logic signals to the computing device, a source connected to ground, and a gate connected to the anode of the photodiode, wherein responsive to the anode of the photodiode surpassing a threshold voltage of the second transistor, the drain of the second transistor transmits a logic high signal to the computing device.
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Specification