RE: Upwards28 Nov 2018 13:23
Back in March Reuters reported that "most Android phones will have to wait until 2019 to duplicate the 3D sensing feature behind Apple’s Face ID security according to three major parts producers." Part of the delay is due to a shortage of vertical-cavity surface-emitting lasers, or VCSELs supply. The supply issue aside, Google was granted a patent today by the U.S. Patent and Trademark Office covering the future use of VCSELs in products like a Pixel smartphone.
Google was granted patent 10,139,217 today titled "Array based patterned illumination projector." When Apple introduced their TrueDepth Camera that supports Face ID authentication, Apple presented a slide outlining the make-up of such a camera that included a "Flood illuminator" and a "Dot projector" that floods a subjects face to create an accurate 3D model of a face.
Google's patent covers the same type of "pattern illumination projector." Google's patent FIG. 5 below is a block diagram of an example system that includes a light emitter and a light detector; FIG. 6 is a flowchart of a method for operating a light emitter to produce patterns of illumination.
Google notes in their granted patent that "The light emitter #560 producing a particular pattern of illumination includes generating light from a set of one or more interconnected light-emitting elements (e.g., LEDs, lasers, VCSELs) of the die #570.
The light emitter #560 can be part of a smart phone, digital assistant, head-mounted display, controller for a robot or other system, or some other portable computing device.
In such examples, the light emitted from the light emitter (e.g., as different patterns of illumination) could be used to determine the location of objects (e.g., of objects including light detectors) relative to such other objects (e.g., the location of a user's hand, on which is disposed a light detector, relative to a user's head, on which a head-mounted display including the light emitter 560 is disposed).
Alternatively, the light emitter can be part of a system that is mounted to a floor, wall, ceiling, or other object or building such that the location of the light emitter is relatively static relative to an environment of interest.
The object #500 of FIG. 5 could be part of or disposed on a system (e.g., a drone), a tag or other device attached to an object or person of interest (e.g., to a body segment of a person, to facilitate motion capture), or configured in some other way to facilitate determination of the location of the object #500 based on a time-varying intensity of light received from the light emitter.
Google further notes that "It could be beneficial in a variety of applications to detect and/or determine the location of an object in an environment. These applications could include tracking the location of a drone, a ball used in a game, a conductor's baton, a controller, a body part of a person (e.g., for motion capture o
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