- 专利标题: Time-to-digital converter for depth sensing
-
申请号: US17536985申请日: 2021-11-29
-
公开(公告)号: US11754720B2公开(公告)日: 2023-09-12
- 发明人: Augusto Ronchini Ximenes , Michael Hall
- 申请人: Meta Platforms Technologies, LLC
- 申请人地址: US CA Menlo Park
- 专利权人: Meta Platforms Technologies, LLC
- 当前专利权人: Meta Platforms Technologies, LLC
- 当前专利权人地址: US CA Menlo Park
- 代理机构: Fenwick & West LLP
- 主分类号: G01S17/00
- IPC分类号: G01S17/00 ; G01S17/894 ; G01S7/4865 ; G06T7/80 ; G06T7/521
摘要:
A depth camera assembly is used to obtain depth information describing a local area. The depth camera assembly includes a sensor having a plurality of pixels. Some or all of the pixels are divided into groups that are coupled to respective multi-purpose time-to-digital converters. Each multi-purpose time-to-digital converter comprises an oscillator and a counter. Each pixel in a group is associated with a multiplexer that is configured to select between inputs coupled to the pixel, the oscillator, or a counter associated with a different pixel. The multiplexer outputs the signal to the counter for the time-to-digital converter associated with the pixel. A time-of-flight measurement is taken during a first portion of an image frame. During a second portion of the image frame, the sensor may be used as an intensity counter. During a third portion of the image frame, the depth sensor may be calibrated.
公开/授权文献
- US20220082699A1 TIME-TO-DIGITAL CONVERTER FOR DEPTH SENSING 公开/授权日:2022-03-17
信息查询