Apparatus and Method for measuring distance using SPAD(Single Photon Avalanche Diode) using TOF(Time of Flight)

摘要

According to one aspect, a distance measuring device is proposed. At this time, the device is a light source that irradiates an optical signal to the object, at least one light receiving unit that receives the optical signal, and when a light receiving event in which a light signal having a threshold energy or higher is received is detected by the light receiving unit, when the light signal is irradiated from the light source A light receiving time determining unit that determines a light receiving time, which is a difference between time points when an optical signal is received, counting the difference between the number of light receiving events occurring before the reference time in the time range of interest and the number of light receiving events occurring after the reference time It includes a counter, and a processor, the processor, based on the counting value of the counter, the light signal irradiated from the light source is reflected from the object to determine the flight time (Time of flight: ToF) until it is detected by the light receiving unit Can.