Lidar device using time-delayed local oscillator light and method of operation thereof

By using time-delayed local oscillator light (LO light) interferometry and a high-pass filter, the challenges of noise suppression and cost control in LiDAR devices have been solved, enabling high-precision and low-cost distance measurement.

CN114114302BActive Publication Date: 2026-07-07SAMSUNG ELECTRONICS CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202110202649.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-08-27
Filing Date
2021-02-23
Publication Date
2026-07-07
Estimated Expiration
2041-02-23

AI Technical Summary

Technical Problem

Existing LiDAR devices using Time-of-Flight (ToF) and FMCW methods face challenges in noise suppression and cost control, making it difficult to achieve high-precision and low-cost distance measurements.

Method used

Distance measurement is performed using time-delayed local oscillator light (LO light). The distance is determined by interfering continuous wave light and time-delayed LO light, combined with a high-pass filter and a processor, thus avoiding dependence on broadband receivers and high frequency accuracy.

Benefits of technology

It enables high-precision distance measurement in the time domain, reduces equipment costs, simplifies signal processing, and reduces the need for complex frequency domain analysis.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN114114302B_ABST
    Figure CN114114302B_ABST
Patent Text Reader

Abstract

A light detection and ranging (LiDAR) device includes a transmitter configured to emit continuous wave light to an object and to provide a local oscillator (LO) light corresponding to the emitted continuous wave light, a delay circuit configured to time delay the LO light, a receiver configured to receive the continuous wave light reflected from the object, and a detection circuit configured to determine a distance from the LiDAR device to the object based on the time delayed LO light and the received continuous wave light.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Apparatus for installing warning triangle in autonomous vehicle and method thereof

    KR1020200108528A

  • Laser radar device and frequency modulation control method

    EP3627184A1