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

Claim 0:
1. A holographic display system of a motor vehicle for providing a maximum intensity value of an intermediate image to decrease in real-time a graphics speckle noise, the holographic display system comprising:
a light source for generating a beam of coherent light;
a spatial light modulator (SLM) comprising a display with a hologram generating unit and a plurality of pixels for modulating the beam of coherent light in response to the display receiving the beam of coherent light from the light source;
a beam splitter for splitting the beam of coherent light into an object beam and an intermediate image beam in response to the beam splitter receiving the beam of coherent light from the SLM, with the intermediate image beam being associated with an intermediate image having the graphics speckle noise;
a camera for capturing the intermediate image in response to the camera receiving the intermediate image beam from the beam splitter;
a computer comprising at least one processor electronically connected to the light source, the SLM, and the camera, and the computer further comprising a non-transitory computer readable storage medium (CRM) storing instructions such that the processor is programmed to:
receive the intermediate image from the camera;
compare at least one parameter to at least one threshold value; and
generate 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;

where the SLM modifies in real-time 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.