公开(公告)号：WO2020197715A1

公开(公告)日：2020-10-01

申请号：PCT/US2020/020756

申请日：2020-03-03

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： GREIF, Daniel, Guenther ,  MARTIIN, Chadwick, Brian ,  MCELDOWNEY, Scott, Charles ,  MCNALLY, Stephen, James ,  GOWARD, John ,  HOLMES, Stephen, John

IPC: G02B19/00 ,  G02B6/12 ,  G02B27/01 ,  G02B27/09

Abstract: A light source or projector for a near-eye display includes a light source subassembly optically coupled to a waveguide concentrator. The light source subassembly may include several semiconductor chips each hosting an array of emitters such s superluminescent light-emitting diodes. The semiconductor chips may be disposed side-by-side, with their emitting sides or facets coupled to the waveguide concentrator, which provides a tight array of output light ports on a common output plane of the concentrator. The output diverging beams at the array of output light ports are coupled to a collimator, which collimates the beams and couples them to an angular scanner for scanning the collimated light beams together across the field of view of the display.

公开(公告)号：WO2020263476A1

公开(公告)日：2020-12-30

申请号：PCT/US2020/034341

申请日：2020-05-22

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： GREIF, Daniel, Guenther ,  LAUDOLFF, James

IPC: G02B26/08 ,  G02B26/10 ,  G02B26/12 ,  G02B27/00

Abstract: A scanning projector display includes a light engine comprising N emitters coupled to a collimator for providing a fan of N light beams of variable optical power levels, where N >1. The N emitters are spaced apart from each other such that pixels of the image simultaneously energized by neighboring ones of the N emitters are non-adjacent. A scanner receives and angularly scans the fan of N light beams about first and second non-parallel axes to provide an image in angular domain. A controller coupled to the scanner and the light engine causes the scanner to simultaneously scan the fan of N light beams about the first and second axes, and cause the light engine to vary the optical power levels of the N emitters with time delays such that adjacent pixels of the image are energized by different ones of the A emitters.

公开(公告)号：WO2020205314A1

公开(公告)日：2020-10-08

申请号：PCT/US2020/024273

申请日：2020-03-23

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： MAGOZ, Ziv ,  GREIF, Daniel, Guenther ,  LAUDOLFF, James ,  MASOOD, Taha ,  PETERSON, Jonathan, Robert ,  MCELDOWNEY, Scott, Charles ,  HOLMES, Stephen, John

IPC: G02B26/08 ,  G02B26/10

Abstract: A controller for a tillable MEMS reflector is configured to oscillate the reflector about X axis or about X and Y axes, and to obtain information about current and past tilt angles. The controller is configured to evaluate tilt angles of the tillable MEMS reflector at a later moment of time based on the previously obtained information about the tilt angles of the tillable MEMS reflector at the different earlier moments of time. The controller may be further configured to energize the light source providing a light beam to the tillable MEMS reflector at the later moment of time with brightness and color corresponding to the brightness and color of a pixel that will be painted by the tillable MEMS reflector at the later moment of time. A statistical model may be combined with machine learning to accurately predict future tilt angles of the tillable MEMS reflector.

公开(公告)号：WO2020205303A1

公开(公告)日：2020-10-08

申请号：PCT/US2020/024157

申请日：2020-03-23

Applicant: FACEBOOK TECHNOLOGIES, LLC

Inventor： MCNALLY, Stephen, James ,  MARTIN, Chadwick, Brian ,  CHI, Wanli ,  MCELDOWNEY, Scott, Charles ,  PARSONS, Maxwell ,  GREIF, Daniel, Guenther

IPC: G02B27/01 ,  H01S5/022

Abstract: A light source includes a first set of source elements and a second set of source elements. A respective set of edge emitting laser source elements (413, 415, 417) is disposed on a respective substrate (878) and electrically coupled to a respective set of circuit pads (822) formed on a respective top surface of the respective substrate by respective bond wires. At least a portion of the respective top surfaces face each other and are spaced apart from each other to accommodate at least some of the first set of source elements, at least some of the second set of source elements, and at least some of the bond wires. The display device that includes a light source configured to output image light, an optical assembly configured to collimate the image light, a scanning assembly configured to steer the image light, and an output device configured to output the image light for displaying images is also disclosed.