US Patent No. 9,398,277

PROJECTION TYPE DISPLAY DEVICE AND METHOD FOR PRODUCING RECORDED IMAGES


Patent No. 9,398,277
Issue Date July 19, 2016
Title Projection Type Display Device And Method For Producing Recorded Images
Inventorship Hiroaki Ikeda, Tokyo (JP)
Assignee NEC DISPLAY SOLUTIONS, LTD., Tokyo (JP)

Claim of US Patent No. 9,398,277

1. A projection type display device comprising:
projection means that projects an input image, representing an object on a background and corresponding to an input video
signal, onto a projection surface on which a user writes information, and

processing means that, upon receiving a photographing instruction to perform photographing, stops projection by the projection
means and photographs the projection surface to generate a photographed image, and detects a difference between the color
of the background in the input image and the color of the projection surface in the photographed image, to generate a corrected
image by correcting the color of the input image or the photographed image so as to reduce the difference, and generates a
recorded image by superimposing the corrected image on the other of the input image and the photographed image.