公开(公告)号：US11275243B2

公开(公告)日：2022-03-15

申请号：US16549606

申请日：2019-08-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  Envisics Ltd.

Inventor： Kai-Han Chang ,  Thomas A. Seder ,  Jamieson Leigh Christmas

IPC: G02B27/01 ,  G03H1/22 ,  B60K35/00

Abstract: A replicator assembly includes reflective, transmissive, and transparent elements. The reflective element receives and reflects a hologram of a HUD system. The transmissive element includes a partially transmissive portion that receives a reflection of the hologram from the reflective element, outputs N replications of the hologram, and reflects N−1 replications of the hologram. The partially transmissive portion is implemented as a continuous transmission neutral density filter across different phase regions. The phase regions of the partially transmissive portion correspond respectively to the N replications. N is an integer greater than or equal to 2. The reflective element reflects the N−1 replications of the hologram. The transparent element is disposed between the reflective and transmissive elements and guides the N replications of the hologram between the reflective and transmissive elements. The reflective, transmissive and transparent elements are implemented as a replicator and collectively provide the N replications of the hologram.

公开(公告)号：US10996480B1

公开(公告)日：2021-05-04

申请号：US16599777

申请日：2019-10-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Kai-Han Chang ,  Thomas A. Seder

IPC: G02B27/01 ,  H04N9/31 ,  B60K35/00 ,  G06T19/00

Abstract: Calibrating a virtual image projected from a vehicle HUD system onto a windshield includes displaying a fiducial at a predetermined location upon the windshield, projecting a test image from a test image generator within the HUD system, aligning the test image with the fiducial, determining a positional deviation from a test image calibrated position required to align the test image with the fiducial, and based upon the positional deviation and a known positional relationship between a virtual image calibrated position and the test image calibrated position, aligning the virtual image with the fiducial.

公开(公告)号：US20190341581A1

公开(公告)日：2019-11-07

申请号：US15968015

申请日：2018-05-01

Applicant: GM Global Technology Operations LLC

Inventor： Kai-Han Chang ,  Thomas A. Seder

IPC: H01L51/52 ,  G02B3/00 ,  H01L27/32

Abstract: An organic light-emitting diode (OLED) pixel is composed of a plurality of subpixel elements and one or more lenses, including first, second and third subpixel elements that emit light beams having first, second and third colors, respectively. The first subpixel element exhibits a first light divergence angle, the second subpixel element exhibits a second light divergence angle, and the third subpixel element exhibits a third light divergence angle. A first lens is disposed on the second subpixel element, with a first refractive index to refract the light beam of the second subpixel element to a light divergence angle that is equivalent to the first light divergence angle. A second lens is disposed on the third subpixel element, with a refractive index to refract the light beam of the third subpixel element to a divergence angle that is equivalent to the first light divergence angle.

公开(公告)号：US12087190B2

公开(公告)日：2024-09-10

申请号：US17814661

申请日：2022-07-25

Applicant: GM Global Technology Operations LLC

Inventor： Kai-Han Chang ,  Thomas A. Seder ,  Manoj Sharma

IPC: G09G3/00 ,  B60K35/00 ,  G02B5/02 ,  G02B27/01 ,  G02B27/36 ,  G06T5/00 ,  G06T5/80 ,  B60K35/23 ,  B60K35/81

CPC classification number: G09G3/002 ,  B60K35/00 ,  G02B5/0284 ,  G02B27/0103 ,  G02B27/36 ,  G06T5/80 ,  B60K35/23 ,  B60K35/81 ,  B60K2360/21 ,  B60K2360/29 ,  G02B2027/011 ,  G02B2027/0138 ,  G09G2320/0693 ,  G09G2380/10

Abstract: A system for calibrating a waveguide-based holographic head-up display that projects images upon a windscreen of a vehicle including a light-diffusing panel positioned at the center of an eyellipse to reflect the images projected by the waveguide-based holographic head-up display. An eyebox of the waveguide-based holographic head-up display is positioned at the center of the eyellipse, and the eyebox is divided into a plurality of unit exit pupils. The system also includes a camera positioned to capture the images reflected by the light-diffusing panel and one or more controllers in electronic communication with the waveguide-based holographic head-up display and the camera. The one or more controllers execute instructions to determine a warp map based on a plurality of corrected individual calibration patterns.

公开(公告)号：US12001168B2

公开(公告)日：2024-06-04

申请号：US17038356

申请日：2020-09-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Kai-Han Chang ,  Thomas A. Seder

IPC: G03H1/22 ,  G02B27/01

CPC classification number: G03H1/2294 ,  G02B27/0172 ,  G03H1/2249 ,  G02B2027/0174 ,  G02B2027/0178 ,  G03H2001/2271 ,  G03H2222/34 ,  G03H2223/18 ,  G03H2223/19

Abstract: A holographic projection system including first, second and third light sources, SLMs, a lens, a combiner and a control module. The first, second and third light sources generate respective light beams. The light beams have respective wavelengths. The SLMs respectively diffract the light beams. The lens is disposed to adjust a divergence angle of one of the light beams, such that diffracted light out of each of the SLMs is at a same diffraction angle. The SLMs encode phase holograms including respective versions of a graphic image based on light generated by the light sources including light output from the lens to provide phase hologram beams. The combiner combines the phase hologram beams to provide a combined phase hologram beam projected for viewing a combined graphic image. The control module encodes a prism hologram on one of the SLMs to align outputs of the SLMs.

公开(公告)号：US11978265B2

公开(公告)日：2024-05-07

申请号：US17692488

申请日：2022-03-11

Applicant: GM Global Technology Operations LLC

Inventor： Joseph F. Szczerba ,  John P. Weiss ,  Kai-Han Chang ,  Thomas A. Seder

IPC: G06V20/58 ,  B60K35/00 ,  B60K35/23 ,  B60K35/28 ,  G06T7/70 ,  G06T11/00 ,  G06V40/18 ,  H04N7/18 ,  B60K35/65

CPC classification number: G06V20/582 ,  B60K35/00 ,  G06T7/70 ,  G06T11/00 ,  G06V40/18 ,  H04N7/183 ,  B60K35/23 ,  B60K35/28 ,  B60K35/65 ,  B60K2360/166 ,  B60K2360/168 ,  B60K2360/177 ,  B60K2360/31 ,  B60K2360/741 ,  G06T2207/30201 ,  G06T2207/30256

Abstract: A method for displaying lane information on an augmented reality display includes receiving roadway data. The roadway data includes information about a roadway along a route of a vehicle. The roadway includes a plurality of lanes. The roadway data includes lane information about at least one of the plurality of lanes along the route of the vehicle. The method further includes receiving vehicle-location data. The vehicle-location data indicates a location of the vehicle. The method further includes determining that that the vehicle is approaching a road junction using the vehicle-location data and the roadway data. The method further includes, in response to determining that the vehicle is approaching the road junction, transmitting a command signal to a dual-focal plane augmented reality display to display at least one virtual image that is indicative of the lane information.

公开(公告)号：US11947315B2

公开(公告)日：2024-04-02

申请号：US17237815

申请日：2021-04-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Thomas A. Seder ,  Kai-Han Chang

IPC: G09G5/02 ,  B60K35/00 ,  G03H1/22 ,  G06F3/01 ,  G06T7/521 ,  G06T7/90

CPC classification number: G03H1/2294 ,  B60K35/00 ,  G03H1/2249 ,  G06F3/013 ,  G06T7/521 ,  G06T7/90 ,  B60K2370/1529 ,  B60K2370/29 ,  G03H2001/2284 ,  G03H2225/30

Abstract: A holographic projection system includes a SLM that receives a light beam and generates a modulated beam projected at an eyebox, where: the modulated beam includes multiple versions of a test image; and the test image includes bright objects and transparent regions, which are selected dark areas of interest for measuring luminance. A control module runs a test to characterize contrast in each of multiple virtual image planes including: controlling the SLM to generate the modulated beam; measuring luminance levels of each of the versions of the test image displayed in the virtual image planes; calculating contrast ratios based on the luminance levels of each of the versions of the test image; determining whether the contrast ratios are within predetermined ranges of predetermined contrast ratios; and adjusting operation of the SLM in response to one of the contrast ratios not being within a corresponding one of the predetermined ranges.

公开(公告)号：US11938821B2

公开(公告)日：2024-03-26

申请号：US17864612

申请日：2022-07-14

Applicant: GM Global Technology Operations LLC

Inventor： Joseph F. Szczerba ,  Kai-Han Chang ,  Manoj Sharma ,  Thomas A. Seder

IPC: B60K35/00 ,  G03H1/00 ,  G06F3/01 ,  G06F3/16 ,  H04N13/368 ,  H04N13/383

CPC classification number: B60K35/00 ,  G03H1/0005 ,  G06F3/013 ,  G06F3/016 ,  G06F3/017 ,  G06F3/167 ,  H04N13/368 ,  H04N13/383 ,  B60K35/10 ,  B60K35/211 ,  B60K35/23 ,  B60K35/25 ,  B60K35/60 ,  B60K2360/146 ,  B60K2360/148 ,  B60K2360/77 ,  G03H2001/0061

Abstract: A method and a system for user interaction with a hologram includes displaying the hologram inside a passenger compartment of the vehicle, after displaying the hologram inside the passenger compartment of the vehicle, monitoring a vehicle user inside the passenger compartment of the vehicle to determine whether the vehicle user provided a user command, determining that the vehicle user provided the user command, and in response to determining that the vehicle user provided the user command, manipulating the hologram in accordance with the user command.

公开(公告)号：US11915395B2

公开(公告)日：2024-02-27

申请号：US17813781

申请日：2022-07-20

Applicant: GM Global Technology Operations LLC

Inventor： Manoj Sharma ,  Kai-Han Chang ,  Thomas A. Seder

IPC: G06T5/00 ,  B60K35/00 ,  G02B27/01

CPC classification number: G06T5/002 ,  B60K35/00 ,  G02B27/0103 ,  G02B2027/0109

Abstract: A holographic display system provides a maximum intensity value of an intermediate image to decrease a graphics speckle noise. The system includes an SLM having a display with a hologram generating unit and a plurality of pixels for modulating a beam of coherent light. The system further includes a beam splitter for splitting the beam into an object beam and an intermediate image beam that is associated with an intermediate image having the noise. The system further includes a camera for capturing the intermediate image, in response to the camera receiving the intermediate image beam. The system further includes a computer having a processor and a CRM. The processor is programmed to generate an actuation signal associated with a corrective holographic phase shift to decrease the noise. The SLM modifies in real-time a holographic phase of the beam per pixel, in response to the SLM receiving the actuation signal.

公开(公告)号：US20240046619A1

公开(公告)日：2024-02-08

申请号：US17817061

申请日：2022-08-03

Applicant: GM Global Technology Operations LLC

Inventor： Manoj Sharma ,  Thomas A. Seder ,  Kai-Han Chang

IPC: G06V10/77 ,  G06V10/82 ,  G02B27/01

CPC classification number: G06V10/7715 ,  G06V10/82 ,  G02B27/0103

Abstract: A system comprises a computer including a processor and a memory. The memory includes instructions such that the processor is programmed to receive, at a deep neural network, an image captured by an image capture device. The processor is also programmed to generate a predicted distortion map based on the image and update at least one weight of the deep neural network based on a loss function of the deep neural network.