Display control system and its control method, switching device, connection device, peripheral device, peripheral device system, and their control method, and computer readable memory
AssigneeCanon Kabushiki Kaisha
InventorsEiichi Matsuzaki, Akio Saito, Takashi Yamamoto, Hajime Morimoto, Yuichi Matsumoto, Kenji Inoue, Nobuharu Ichihashi
Life of this patent
Estimating the term…
Abstract
The presence/absence of an image information request signal HSYNC output from each of a plurality of display devices is monitored. Based on the monitoring result, image information stored in an image memory of a display controller incorporated in a host computer is distributed to each display device.
Claims11
A display control system which has an image memory for storing image information to be displayed on a plurality of display devices and controls said plurality of display devices to display an image on a basis of the image information, the display control system comprising:
- designation means for designating a destination display device from said plurality of display devices, each of said plurality of display devices comprising a display screen which has a plurality of display lines;
- transmitting means for transmitting to said plurality of display devices, device information representing the destination display device designated by said designation means, line information representing a single display line of the plurality of display lines of the destination display device and image information to be displayed on the single display line;
- and
- control means for controlling the single display line of the destination display device to display the image information in accordance with the device information and the line information.
A method of controlling a display control system which has an image memory for storing image information to be displayed on a plurality of display devices and controls said plurality of display devices to display an image on a basis of the image information, the method comprising:
- a designation step of designating a destination display device from said plurality of display devices, each of said plurality of display devices comprising a display screen which has a plurality of display lines;
- a transmitting step of transmitting to said plurality of display devices, device information representing the destination display device designated by said designation step, line information representing a single display line of the plurality of display lines of the destination display device and image information to be displayed on the single display line;
- and
- a control step of controlling the single display line of the destination display device to display the image information in accordance with the device information and the line information.
A computer-readable memory medium which stores program codes for controlling a display control system which has an image memory for storing image information to be displayed on a plurality of display devices, and controls said plurality of display devices to display an image on a basis of the image information, the program codes comprising:
- a program code for a designation step of designating a destination display device from said plurality of display devices, each of said plurality of display devices comprising a display screen which has a plurality of display lines;
- a program code for a transmitting step of transmitting to said plurality of display devices, device information representing the destination display device designated by said designation step, line information representing a single display line of the plurality of display lines of the destination display device and image information to be displayed on the single display line;
- and
- a program code for a control step of controlling the single display line of the destination display device to display the image information in accordance with the device information and the line information.
Dependencies are inferred from the claim text.