Patent ID: 9667932
Date: 2017-05-30
CPC Classifications: G09G,H04N

Claim:
1. Projected image correction apparatus, comprising: a device including a display processor and a projector operative to project an image defining a display area onto a surface; a sensor operative to view the projected image on the surface; a display buffer storing a raw image to be seen by a viewer; a projection buffer storing a version of the raw image to be projected onto the surface; a sensor buffer storing an image of the projected image as viewed by the sensor; and wherein the display processor is operative to compare the image stored in the sensor buffer to the image stored in the display buffer and adjust the image stored in the projection buffer so that the projected image seen by the sensor corresponds to the image stored in the display buffer; wherein the sensor is operative to view an area of the surface which is larger than the display area of the projected image and store an image of the larger area in the sensor buffer; and wherein, in comparing the image stored in the sensor buffer to the image stored in the display buffer, the display processor is operative to determine if the projected image has shifted and intentionally shift the image in the projection buffer to correct for defects in the projected image including motion artifacts caused by movement of the device.