Proximity sensor with motion detection
View Patent ↗A proximity sensor with movement detection is provided. The proximity sensor may include an ASIC chip; at least three light sources configured to emit light in a particular sequence; and a photo detector configured to receive light and generate an output signal. The proximity sensor may have a compact size package, wherein the photo detector may be stacked on the ASIC chip and disposed at a substantially equal distance from the at least three light sources. The proximity sensor includes a driver operable to generate a current to a plurality of light sources in a particular timing sequence, a photo detector configured to receive light and generate an output signal, an ASIC configured to report the movement of an object near the proximity sensor if the output signal pattern generated matches one of the output signal patterns from among a set of known output signal patterns. The proximity sensor may be configured to be used as a counter or an on/off switch based on particular movements detected.
1. A proximity sensor with movement detection comprising:
an ASIC chip;
at least three light sources configured to emit light in a predetermined sequence; and
a photo detector configured to receive light and generate an output signal;
wherein the photo detector is stacked on the ASIC chip and disposed at a substantially equal distance from the at least three light sources;
wherein the ASIC chip comprises a comparator configured to report a movement upon determining the presence of a predetermined profile in the motion signal, wherein the predetermined profile is a profile of a motion signal generated by the control logic in correspondence to a certain movement of an object over the proximity sensor;
wherein the comparator is configured to report a movement if the profile of the motion signal generated by the control logic matches one of the predetermined profiles from among a set of known motion signal profiles; and
wherein the known motion signal profiles comprise horizontal and vertical motion signal profiles corresponding to movements of an object along the X-axis and the Y-axis over the proximity sensor, respectively.
2. The proximity sensor of claim 1 , wherein the ASIC chip comprises control logic coupled to the photo detector and configured to process the output signal to generate a motion signal.
3. The proximity sensor of claim 1 , wherein the at least three light sources are disposed adjacent to three sides of the proximity sensor in a triangular pattern.
4. The proximity sensor of claim 1 , further comprising an epoxy material for encapsulating the light sources, the ASIC and the photo detector, and a casing for covering the epoxy material to form a package.
5. The proximity sensor of claim 1 , further comprising an insulating spacer disposed between the ASIC chip and the photo detector.
6. A proximity sensor with movement detection comprising:
a sensor module comprises at least three light sources configured to emit light and a photo detector configured to receive light and generate an output signal; and
a controller module coupled to the sensor module comprising control logic and a comparator;
wherein the comparator is configured to report a movement upon determining the presence of a predetermined profile in the motion signal, wherein the predetermined profile is a profile of a motion signal generated by the control logic in correspondence to a certain movement of an object over the sensor module;
wherein the comparator is configured to report a movement if the profile of the motion signal generated by the control logic matches one of the predetermined profiles from among a set of known motion signal profiles; and
wherein the known motion signal profiles comprise horizontal and vertical motion signal profiles corresponding to movements of an object along the X-axis and the Y-axis over the sensor module, respectively.
7. The proximity sensor of claim 6 , wherein the at least three light sources are disposed adjacent to three sides of the sensor module in a triangular pattern.
8. The proximity sensor of claim 6 , wherein the control logic is coupled to the photo detector configured to process the output signal to generate a motion signal.
9. The proximity sensor of claim 6 , further comprising an epoxy material covering the at least three light sources and photo detector, and a casing covering the epoxy material to form a sensor module package.
10. A detector comprising:
a sensor module comprising a plurality of light sources configured to emit light and a photo detector configured to receive light and generate an output signal;
a controller coupled to the sensor module and comprising control logic and a comparator;
a counting engine coupled to the controller configured to register predetermined movements of an object;
wherein the sensor module comprises at least three light sources disposed adjacent to three sides of the sensor module in a triangular pattern; and
a substantially clear epoxy material covering the at least three light sources and forming a lens over each of the at least three light sources and a casing covering the epoxy material to form a detector package, wherein the detector package comprises apertures over the at least three light sources and the photo detector.
11. The detector of claim 10 , wherein the control logic is coupled to the photo detector and configured to process the output signal and generate a detection signal in correspondence to a movement of an object over the sensor module.
12. The detector of claim 11 , wherein the counting engine is configured to receive the detection signal to register a movement.