Method and device of distance measurement by time-of-flight calculation with wraparound

A device for measuring a distance between the device and an object, the device comprising:

• a non-transitory memory storage comprising instructions;
• and
• a processor coupled to the non-transitory memory storage, the instructions when executed by the processor, cause the processor to:
• determine a first estimated distance between the device and the object based on time-of-flight measurements of a first set of light pulses having a first period,
• determine a second estimated distance between the device and the object based on a time-of-flight measurements from a second set of light pulses having a second period different from the first period,
• determine whether the device is in a wraparound area among wraparound areas based on an interval between the first estimated distance and the second estimated distance, wherein instructions to determine whether the device is in the wraparound area among wraparound areas comprise instructions to determine that the interval is between a pair of thresholds among a set of pairs of thresholds, and
• add a compensation value to the first estimated distance based on the device being in the wraparound area among the wraparound areas, the compensation value being in accordance with the wraparound area.

A non-transitory computer-readable media storing computer instructions for measuring a distance between a device and an object, that when executed by a processor, cause the processor to:

• determine a first estimated distance between the device and the object based on time-of-flight measurements of a first set of light pulses having a first period;
• determine a second estimated distance between the device and the object based on time-of-flight measurements from a second set of light pulses having a second period different from the first period;
• determine whether the device is in a wraparound area among wraparound areas based on an interval between the first estimated distance and the second estimated distance, wherein causing the processor to determine whether the device is in the wraparound area among the wraparound areas causing the processor to determine that the interval is between a pair of thresholds among a set of pairs of thresholds;
• and
• add a compensation value to the first estimated distance based on the device being in the wraparound area among the wraparound areas, the compensation value being in accordance with the wraparound area.