Abstract: An information processing apparatus includes memories 31 and 32; DMA controller 33 that periodically performs a data transfer from memory 31 to memory 32; display 34 that displays an image based on a video signal output from memory 31; video output terminal 35 that outputs a video signal output from memory 32 to an external device; and controller 30 that, when executing a specific application, prohibits screen information related to the specific application from being transferred by DMA controller 33, and then writes the screen information into memory 31.

Abstract: An image distortion correction method is provided which is capable of correcting for distortion of a projected image by designating an arbitrary correction point by using a simple and easy operation without independently providing a display device and/or a pointing device.

Abstract: An image distortion correction method is provided which is capable of correcting for distortion of a projected image by designating an arbitrary correction point by using a simple and easy operation without independently providing a display device and/or a pointing device.

Abstract: An image distortion correction method is provided which is capable of correcting for distortion of a projected image by designating an arbitrary correction point by using a simple and easy operation without independently providing a display device and/or a pointing device.

Abstract: A video display system comprising a plurality of video display apparatuses 11 to 13 for displaying video signals Sv being supplied as video. A specific video display apparatus 11 out of a plurality of the video display apparatuses 11 to 13 discriminates video characteristics Pv1 to Pv5 of the video signal Sv to output identification signals IDa to IDd that correspond to the discriminated video characteristics (Pa1 to Pa5) to (Pd1 to Pd5) and simultaneously displays the video signal Sv according to the display characteristic characteristics (Qa1 to Qa3) to (Qc1 to Qc3) stored in correspondence to the identification signals IDa to IDd. The other video display apparatuses 12 and 13 than the specific video display apparatus 11 display the video signals Sv according to the display characteristic characteristics (Qa1 to Qa3) to (Qc1 to Qc3) stored in correspondence to the identification signals IDa to IDd.

Abstract: Projector has projection optical system for projecting an image onto a projection surface and optical zoom mechanism for actuating projection optical system to enlarge and reduce the image projected onto the projection surface. Projector also has distortion correcting circuit for correcting distorted quadrilateral projected images, which are projected onto the projection surface along an optical axis that is oblique vertically and horizontally to the projection surface, into respective square corrected images, zoom setting detector for detecting a zoom setting of optical zoom mechanism, and CPU for generating corrective data to be set in distortion correcting circuit based on the zoom setting detected by zoom setting detector.

Abstract: A distortion correcting method is provided which is capable of correcting for distortions of projected images without a need for additionally placing a display unit or a test image displaying unit and by a low-cost configuration and by a simple operation.

Abstract: An image distortion correction method is provided which is capable of correcting for distortion of a projected image by designating an arbitrary correction point by using a simple and easy operation without independently providing a display device and/or a pointing device.

Abstract: There is provided a graphic display device with a built-in speech recognition function, by which electronic presentations can be given without being affected by external factors such as changes in surrounding noises or the way the presenter produces speech. The graphic display device comprises a speech display signal generating section for recognizing speeches inputted from a microphone and generating speech display signals and an image display signal generating circuit for processing image inputs to generate image display signals, and displays the speech display and image display in combination on a screen. The graphic display device further comprises a CPU and a memory control circuit for controlling memories of both the speech and image displays to synchronize the displays.

Abstract: The image display device according to the present invention includes a master display unit and slave display units which respectively display a plurality of pictures that coincide in positions on a projection screen, where the master display unit is equipped with a generation unit that generates an on-screen picture, and the slave display unit is equipped with an erasure unit that erases the portion of the video in a display region corresponding to the on-screen picture.

Abstract: A video display system comprising a plurality of video display apparatuses 11 to 13 for displaying video signals Sv being supplied as video. A specific video display apparatus 11 out of a plurality of the video display apparatuses 11 to 13 discriminates video characteristics Pv1 to Pv5 of the video signal Sv to output identification signals IDa to IDd that correspond to the discriminated video characteristics (Pa1 to Pa5) to (Pd1 to Pd5) and simultaneously displays the video signal Sv according to the display characteristic characteristics (Qa1 to Qa3) to (Qc1 to Qc3) stored in correspondence to the identification signals IDa to IDd. The other video display apparatuses 12 and 13 than the specific video display apparatus 11 display the video signals Sv according to the display characteristic characteristics (Qa1 to Qa3) to (Qc1 to Qc3) stored in correspondence to the identification signals IDa to IDd.