Patent ID: 11915395
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Transport (Mechanical engineering)
Classification: CPC G  B | IPC B  G

Claim 16:
17. A method of operating a holographic display system of a motor vehicle, with the method providing a maximum intensity value of an intermediate image to decrease a graphics speckle noise, the holographic display system includes a light source, a spatial light modulator (SLM), a beam splitter, a camera, and a computer having at least one processor and a non-transitory computer readable storage medium (CRM), with the SLM having a display with a hologram generating unit and a plurality of pixels, the method comprising:
generating, using the light source, a beam of coherent light;
modulating, using the display of the SLM, the beam of coherent light in response to the display receiving the beam of coherent light from the light source;
splitting, using the beam splitter, the beam of coherent light into an object beam and an intermediate image beam that is associated with an intermediate image having the graphics speckle noise;
capturing, using the camera, the intermediate image in response to the camera receiving the intermediate image beam from the beam splitter;
receiving, using the at least one processor, the intermediate image from the camera;
comparing, using the at least one processor, at least one parameter to at least one threshold value;
generating, using the at least one processor, an actuation signal associated with a corrective holographic phase shift to decrease the graphics speckle noise for each of the pixels based on the intermediate image; and
modifying in real-time, using the SLM, a holographic phase of the beam of coherent light per pixel in response to the SLM receiving the actuation signal from the at least one processor.