Patent ID: 9098195
Filing Date: 2015-08-04
Classification: G06F,G06T,H04N

Abstract:
1. A display device for use in a presentation system, which optically emits an image to an interactive white board device having a display section of the image for displaying the image, the display device comprising: a display device control section comprising a central processing unit, the display device control section controls the operation of the display device; an image processing section that reduces a first image input to the display device in a vertical direction to generate a second image on the basis of a command related to a projection angle to the interactive white board from the display device control section; an OSD display control section that generates a third image which is displayed together with the second image on the basis of a command from the display device control section; an OSD synthesis processing section that synthesizes the second image and the third image without superimposition with each other to generate a fourth image; a distortion correction processing section that reduces the fourth image in a horizontal direction according to a vertical position of the fourth image on the basis of the command related to the projection angle to the interactive white board from the display device control section to generate a fifth image; and an optical display section that optically emits the fifth image to the interactive white board, wherein the display device control section controls the OSD display control section so as to generate the third image to modify its display form in the vertical direction according to the reduction processing of the first image in the vertical direction in the image processing section by reducing a number of scanning lines, to synthesize the second image that is the inputted image of which width in the vertical direction is reduced and the third image that is an OSD image after both images are generated separately, and to reduce the synthesized image in the horizontal direction according to the projection angle and to correct the distortion.