公开(公告)号：US11445155B1

公开(公告)日：2022-09-13

申请号：US17208810

申请日：2021-03-22

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Ian Andrews

IPC: H04N9/31 ,  G02B27/01 ,  G02B26/10

Abstract: Display systems, such as near eye display systems or wearable heads up displays, may include a laser projection system having an optical engine and an optical scanner. Light output by the optical engine may be directed into the optical scanner as two angularly separated laser light beams. The angularly separated laser light beams may overlap at an entrance pupil plane along a first dimension at a first scan mirror of the optical scanner, or at a location between the first scan mirror and an optical relay of the optical scanner. The angularly separated laser light beams may overlap at an exit pupil plane along the first dimension at a second scan mirror of the optical scanner or at an incoupler of the laser projection system.

公开(公告)号：US20220269084A1

公开(公告)日：2022-08-25

申请号：US17580749

申请日：2022-01-21

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Stuart James Myron Nicholson

IPC: G02B27/01 ,  G02B27/14

Abstract: Systems, devices, and methods for accommodating multiple sets of laser light sources in an optical engine of a display system such as a laser projection system are described. Laser light beams may be combined via wavelength-, polarization-, and/or angular-separation-based techniques. First and second sets of laser light beams may be angularly separated such that different sets of partially overlapping pixels are projected by the system, thereby increasing the display pixel density and/or an expanding the field of view of the display. One or more laser die may be mounted to each submount of the optical engine. For embodiments with two laser dies on each submount, collimating lenses may introduce angular separation between laser light beams output by each pair of commonly mounted laser dies. A retroreflector prism may be disposed at a beam combiner to provide a compact extension of the optical path through the beam combiner.

公开(公告)号：US20220269078A1

公开(公告)日：2022-08-25

申请号：US17212750

申请日：2021-03-25

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Jaehong Choi

IPC: G02B27/01 ,  F21V8/00 ,  G02B27/00 ,  G02C9/04

Abstract: An optical device includes a light guide (LG) attached to a support component. The LG receives a display light from a light engine, and directs a first portion of the display light out of the LG to form an outcoupled light. The LG also causes a second portion of the display light to become incident upon an outer perimeter of the LG at one or more LG regions of the LG to form one or more stray lights, respectively. The LG may be mechanically coupled to the support component at one or more coupling regions positioned outside of the one or more LG regions. A wearable heads-up display (WHUD) can incorporate the optical device.

公开(公告)号：US20220163803A1

公开(公告)日：2022-05-26

申请号：US17531117

申请日：2021-11-19

Applicant: GOOGLE LLC

Inventor： Daniel Adema

IPC: G02B27/01 ,  H04N9/31 ,  G02B26/10

Abstract: Display systems, such as near eye display systems or wearable heads up displays, may include a laser projector having an optical switch assembly disposed an at input to an optical scanner of the laser projector. The optical switch assembly includes at least one optical switch, and a controller selectively modifies the orientation of each optical switch to selectively change an angle at which laser light is directed onto a scan mirror of the optical scanner. Changing this angle shifts the scan region over which the scan mirror scans the laser light and, relatedly, shifts a region of a field of view of the display. In some embodiments, the controller is configured to modify the optical switch orientation(s) to correct non-idealities in the angle of the laser light.