Display controller for controlling multi-display type display, method of displaying pictures on multi-display type display, and multi-display type information processing system

A display comprising:

• a display unit for displaying an image;
• and a display controller that receives display data through a bus from an external system and controls the display unit;
• wherein said display controller comprises:
• a plurality of input data processors that receive display data from the external system through a display data bus;
• a control data processor that receives control data through a control data bus from the external system;
• a display data selector that selects one of the plurality of input data processors according to the received control data;
• and
• an output unit that sends the display data of the input data processor selected by the display data selector to the display unit;
• wherein the control data includes information specifying the display data;
• and
• wherein the control data is transmitted by the external system independently of the display data.

A display comprising a plurality of display units, and a plurality of display controllers respectively corresponding to the plurality of display units;

• wherein:
• the plurality of display units display images represented by display data sent thereto from the corresponding display controllers;
• a first one of the display controllers comprises:
• an input data processor that receives the display data through a display data bus from an external system;
• and
• a control data processor that receives control data through a control data bus from the external system;
• the control data processor having registers that store values included in the control data and indicating display start positions, a display region and a magnification specifying a mode of displaying the display data received from the external system to the display unit;
• and
• a second one of the display controllers comprises:
• an input data processor that receives display data from the first display controller;
• and
• a control data processor that receives control data from the first display controller;
• the control data processor receiving control data from the first display controller to display the display data received from the external system on the corresponding display unit, and having registers for storing values included in the input control data calculated on the basis of the relation between the first display controller and the corresponding display unit and indicating display start positions, a display region and a magnification equal to that for the first display controller;
• wherein the control data includes information for determining whether the display data is displayed in each display unit;
• and
• wherein the control data is transmitted independently of the display data.

A method of displaying images by a display comprising a display unit for displaying images, and a display controller for controlling the display unit, said method comprising the steps of:

• receiving display data from an external system through a display data bus;
• receiving control data from the external system through a control data bus, including information specifying a partial display data included in the display data;
• sending the input display data to the display;
• and
• controlling an operation according to the control data so that the partial display data included in the display data is sent to the display unit;
• wherein the control data is transmitted by the external system independently of the display data.

A method of displaying images by a display comprising a display unit for displaying images, a display controller that receives display data through a bus from an external system and controls the display unit, and a plurality of input data processors, said method comprising the steps of:

• receiving display data through a display data bus from the external system by the plurality of input data processor;
• receiving control data through a control data bus from the external system;
• selecting one of the plurality of input data processors according to the input control data;
• and
• sending the input display data to the display unit;
• wherein the control data includes information specifying the display data;
• and
• wherein the control data is transmitted by the external system independently of the display data.

A method of displaying images by a display comprising a plurality of display units, and a plurality of display controllers respectively corresponding to the plurality of display units;

• wherein:
• the plurality of display units display images represented by input display data received from the display controllers;
• a first one of the plurality of display controllers receives the display data through a display data bus from an external system, receives control data through a control data bus from the external system, and stores values indicating display start positions, a display region and a magnification to display the unit display data included in the control data received from the external system to the corresponding display unit;
• and
• a second one of the plurality of display controllers receives display data from the first display controller, receives control data from the first display controller, and stores values calculated on the basis of the relation between the first display controller and the corresponding display unit and indicating display start positions, a display region and a magnification equal to that for the first display controller;
• wherein the control data includes information for determining whether the display data is displayed in each display unit;
• and
• wherein the control data is transmitted independently of the display data.

An information processing system connected to a multi-display comprising a plurality of display units, said information processing system comprising:

• input means for inputting data on an arrangement of the plurality of display units;
• storage means for storing the input data on the arrangement of the plurality of display units;
• deciding means for deciding display positions on the plurality of display units on which the image is to be displayed by using the data on the arrangement of the plurality of display units stored in the storage means;
• and
• transmission means for transmitting control data complying with the display positions decided by the deciding means to the multi-display.