US 10,503,265 B2Granted

Mixed-mode depth detection

AssigneeMicrovision, Inc.

InventorP. Selvan Viswanathan

Life of this patent

Estimating the term…

Loading patent…

Abstract

Briefly, in accordance with one or more embodiments, a MEMS laser beam display to implement mixed-mode depth detection comprises an imaging engine to project an image in a field of view of the MEMS laser beam display, a time of flight (TOF) depth detector to determine a distance to a target within the field of view in a first mode of depth detection, wherein the TOF depth detector determines coarse depth data of the target, and a structured light depth detector to determine a distance to the target in a second mode of depth detection, wherein the structured light depth detector determines fine depth data of the target. Depth processing circuitry may generate a composite three-dimensional (3D) image of the target, or may identify a gesture region of the target for gesture recognition.

Claims21

Dependent claims

A MEMS laser beam display, comprising:

at least one source of laser light configured to generate a laser beam;
an imaging engine configured to reflect the laser beam in a pattern to project an image in a field of view of the MEMS laser beam display;
a time of flight (TOF) depth detector configured to receive reflections of the laser beam from a target to determine a distance to the target within the field of view via a time of flight calculation in a first mode of depth detection, wherein the TOF depth detector determines three-dimensional (3D) coarse depth data of the target;
depth processing circuitry to identify one or more regions in the field of view from the 3D coarse depth data, where the one or more regions include of only a portion of the field of view, and wherein the imaging engine is further configured to project at least one on structured light pattern in the identified one or more regions while not projecting the at least one structured light pattern outside the identified one or more regions in the field of view;
a structured light depth detector configured to detect a reflection of the at least one structured light pattern from the target to determine a distance to the target in the one or more identified regions in a second mode of depth detection, wherein the structured light depth detector determines three-dimensional (3D) fine depth data of the target in the one or more identified regions;
and
wherein the depth processing circuitry is further configured to generate a composite three-dimensional (3D) image of the target using a combination of the 3D coarse depth data and the 3D fine depth data for the one or more identified regions.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/848,128Filed 8 Sep 2015
Published: US 2017/0068319 A19 Mar 2017
Granted: 10 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G06F 3/017
Input arrangements or combined input and output arrangements for interaction between user and computer: gesture based interaction, e.g. based on a…
G01S 7/4817
Constructional features, e.g. arrangements of optical elements: relating to scanning
G01S 17/46
Systems determining position data of a target: indirect determination of position data
G01S 17/89
Lidar systems specially adapted for specific applications: for mapping or imaging

Family

US 2017/0068319 A1Pre-grant publication · published 9 Mar 2017
US 10,503,265 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key