Patent ID: 11953597
Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A distance measurement device comprising:
a light source section that emits a first light pulse, the first light pulse including a first ramp portion between a first signal level and a second signal level and a first discrete signal edge between the first signal level and the second signal level that is different from the first ramp portion;
a controller that instructs the light source section to emit the first light pulse;
a lens that a first reflected light pulse corresponding to the first light pulse enters;
a light receiver that includes a photodiode which causes a signal charge to be generated by receiving the first reflected light pulse via the lens, and generates a light reception signal by storing the signal charge and converting the signal charge into a voltage;
a signal edge detector that performs a first detection operation of detecting the first discrete signal edge corresponding to the first reflected light pulse in the light reception signal; and
a time measurement section that performs, on a basis of the first discrete signal edge, a first measurement operation of measuring a first time interval from an emission timing of the first light pulse in the light source section to a reception timing of the first reflected light pulse in the light receiver.