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Time-of-Flight-Based Ranging Methods and Related Ranging Systems

A technology of time-of-flight and ranging method, which is applied in the ranging system and the field of ranging based on time-of-flight to achieve the effect of improving performance

Active Publication Date: 2020-11-27
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in high dynamic range (high dynamic range, HDR) applications, the existing technology still has considerable room for improvement in terms of the range covered by distance measurement and the control of the degree to which distant information is affected by background light.

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  • Time-of-Flight-Based Ranging Methods and Related Ranging Systems
  • Time-of-Flight-Based Ranging Methods and Related Ranging Systems
  • Time-of-Flight-Based Ranging Methods and Related Ranging Systems

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Embodiment Construction

[0014] The following disclosure provides various implementations or illustrations, which can be used to achieve different features of the disclosure. Specific examples of components and arrangements are described below to simplify the present disclosure. It will be appreciated that these descriptions are merely examples and are not intended to limit the disclosure. For example, in the description below, forming a first feature on or over a second feature may include some embodiments wherein the first and second features are in direct contact with each other; and may also include In some embodiments, additional components are formed between the first and second features, such that the first and second features may not be in direct contact. In addition, this disclosure may reuse reference symbols and / or labels in various embodiments. Such repetition is for the sake of brevity and clarity, and does not in itself represent a relationship between the different embodiments and / or ...

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Abstract

The invention discloses a time-of-flight-based ranging method and a time-of-flight-based ranging system. The method comprises steps that a plurality of first pulses (PE) are intermittently transmittedfrom a pulse generating unit, wherein the plurality of first pulses are reflected by a target object to generate a plurality of first reflection signals (RL); a time-of-flight sensor selectively performs first signal sampling or second signal sampling on the plurality of first reflection signals to generate a first sampling result, wherein the start time point (t2) of the first signal sampling and the corresponding transmission time point (t1) of the first pulse have a first time difference (tX), the first signal sampling lasts for a first predetermined time (TR1), and the start time point (t10) of the second signal sampling and the corresponding transmission time point (t7) of the first pulse have a second time difference (tX + 2TN), and the second signal sampling lasts for a second predetermined time (TR2), and the first time difference is less than the second time difference.

Description

technical field [0001] The present application relates to ranging and depth sensing technologies, and in particular to a time-of-flight based ranging method and a related ranging system. Background technique [0002] In the distance measurement technology based on time of flight (TOF), pulse modulation (pulse modulation) measures the distance of the target object through the time difference between the transmission and reception of optical pulses, and has a relatively simple measurement mechanism. Pulse modulation requires high precision in time measurement. However, in high dynamic range (high dynamic range, HDR) applications, the existing technology still has considerable room for improvement in terms of the range covered by distance measurement and the control of the degree to which distant information is affected by background light. . Contents of the invention [0003] An embodiment of the present application discloses a time-of-flight based ranging method, comprisi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/10G01S15/10G01S13/10G01S7/527G01S7/526G01S7/487G01S7/4861G01S7/292G01S7/285
CPCG01S7/285G01S7/292G01S7/4861G01S7/487G01S7/526G01S7/527G01S13/10G01S15/10G01S17/10
Inventor 杨孟达李宗德
Owner SHENZHEN GOODIX TECH CO LTD