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Digital pixels and operating methods thereof

A pixel, histogram technology used in the field of reducing power consumption in time-of-flight LIDAR systems, which can solve problems such as unfeasible large data rates

Pending Publication Date: 2021-12-03
感觉光子公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, imaging arrays larger than 100,000 pixels can yield unfeasibly large data rates

Method used

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  • Digital pixels and operating methods thereof
  • Digital pixels and operating methods thereof
  • Digital pixels and operating methods thereof

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Embodiment Construction

[0050] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. In the drawings, the relative sizes of regions or features may be exaggerated for clarity. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the invention to those skilled in the art. range.

[0051] Certain conventional ToF systems utilizing a large number of pixels can produce large data rates. Data rates can be compressed by histogram timestamps. Histogram timestamps may include grouping counts of arriving photons within a "bin" based on arrival time. For example, a histogram data repository that can be generated includes individual bins associated with durations or "windows." However, this ma...

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Abstract

A light detection and ranging (LIDAR) measurement circuit includes an array of single photon detectors configured to detect photons responsive to emission of an optical signal from an emitter, and a pixel processing circuit that is configured to calculate an estimated time of arrival of photons incident on the array of single photon detectors by utilizing a plurality of coarse histogram bins. Respective ones of the plurality of coarse histogram bins are associated with a duration that is greater than one-sixteenth of a pulse width of the optical signal.

Description

[0001] priority claim [0002] This application claims U.S. Provisional Application No. 62 / 794,403, filed January 18, 2019, entitled "Histogram-assisted Pixel" and the application filed on February 1, 2019, entitled "Digital Pixel (Digital Pixel)", the entire content and disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to light detection and ranging (LIDAR or lidar) systems, and more particularly to methods and apparatus for reducing power consumption in time-of-flight LIDAR systems. Background technique [0004] Time-of-flight (ToF)-based imaging is used in a variety of applications, including ranging, depth profiling, and 3D imaging (eg, light detection and ranging (LIDAR)). Direct time-of-flight measurements involve directly measuring the length of time between emitting radiation and sensing the radiation after it has reflected from an object or other target. From this, the distance to the target can be dete...

Claims

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Application Information

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IPC IPC(8): G01S7/4861G01S7/484G01S17/89G01S17/894G01J1/44
CPCG01S17/894G01S7/4865G01S7/4863G01S17/14G01S7/487G01S17/10
Inventor 罗伯特·亨德森塔雷克·阿尔·阿巴斯尼尔·考尔德
Owner 感觉光子公司