DISPLAY CONTROL SYSTEM AND ITS CONTROL METHOD, SWITCHING DEVICE, CONNECTION DEVICE, PERIPHERAL DEVICE, PERIPHERAL DEVICE SYSTEM, AND THEIR CONTROL METHOD, AND COMPUTER READABLE MEMORY
First Claim
Patent Images
1. A display control system which connects a display controller having an image memory for storing image information to a plurality of display devices, and controls said plurality of display devices to display an image on the basis of the image information, comprising:
- monitoring means for monitoring a presence/absence of an image information request signal output from each of said plurality of display devices; and
distribution means for distributing the image information stored in said image memory of said display controller to each of said plurality of display devices on the basis of a monitoring result of said monitoring means.
1 Assignment
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Accused Products
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.
70 Citations
71 Claims
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1. A display control system which connects a display controller having an image memory for storing image information to a plurality of display devices, and controls said plurality of display devices to display an image on the basis of the image information, comprising:
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monitoring means for monitoring a presence/absence of an image information request signal output from each of said plurality of display devices; and
distribution means for distributing the image information stored in said image memory of said display controller to each of said plurality of display devices on the basis of a monitoring result of said monitoring means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling a display control system which connects a display controller having an image memory for storing image information to a plurality of display devices, and controls said plurality of display devices to display an image on the basis of the image information, comprising:
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the monitoring step of monitoring a presence/absence of an image information request signal output from each of said plurality of display devices; and
the distribution step of distributing the image information stored in said image memory of said display controller to each of said plurality of display devices on the basis of a monitoring result in the monitoring step.
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11. A display control system which connects a display controller having an image memory for storing image information to a plurality of display devices, and controls said plurality of display devices to display an image on the basis of the image information, comprising:
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designation means for designating a destination display device of the image information; and
control means for controlling the display device designated by said designation means to display the image based on the image information. - View Dependent Claims (12, 13, 14, 15, 17, 18, 19, 20)
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16. A method of controlling a display control system which connects a display controller having an image memory for storing image information to a plurality of display devices, and controls said plurality of display devices to display an image on the basis of the image information, comprising:
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the designation step of designating a destination display device of the image information; and
the control step of controlling the display device designated in the designation step to display the image based on the image information.
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21. A computer readable memory which stores a program code for controlling a display control system which connects a display controller having an image memory for storing image information to a plurality of display devices, and controls said plurality of display devices to display an image on the basis of the image information, comprising:
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a program code of the monitoring step of monitoring a presence/absence of an image information request signal output from each of said plurality of display devices; and
a program code of the distribution step of distributing the image information stored in said image memory of said display controller to each of said plurality of display devices on the basis of a monitoring result in the monitoring step.
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22. A computer readable memory which stores a program code for controlling a display control system which connects a display controller having an image memory for storing image information to a plurality of display devices, and controls said plurality of display devices to display an image on the basis of the image information, comprising:
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a program code of the designation step of designating a destination display device of the image information; and
a program code of the control step of controlling the display device designated in the designation step to display the image based on the image information. - View Dependent Claims (24, 25, 26, 27)
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23. A switching device for forming a communication path between a host equipment and a plurality of peripheral devices, comprising:
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input means for receiving a signal representing a power supply state which indicates if a power supply of a peripheral device connected to a line on the peripheral device side is ON or OFF;
supply means for supplying electric power to the peripheral device when the signal indicates the ON power supply state; and
output means for outputting the supply state of electric power by said supply means onto a line on the host equipment side as the power supply state of the peripheral device.
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28. A method of controlling a switching device for forming a communication path between a host equipment and a plurality of peripheral devices, comprising:
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the input step of receiving a signal representing a power supply state which indicates if a power supply of a peripheral device connected to a line on the peripheral device side is ON or OFF;
the supply step of supplying electric power to the peripheral device when the signal indicates the ON power supply state; and
the output step of outputting the supply state of electric power in the supply step onto a line on the host equipment side as the power supply state of the peripheral device.
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29. A computer readable memory which stores a program code for controlling a switching device for forming a communication path between a host equipment and a plurality of peripheral devices, comprising:
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a program code of the input step of receiving a signal representing a power supply state which indicates if a power supply of a peripheral device connected to a line on the peripheral device side is ON or OFF;
a program code of the supply step of supplying electric power to the peripheral device when the signal indicates the ON power supply state; and
a program code of the output step of outputting the supply state of electric power in the supply step onto a line on the host equipment side as the power supply state of the peripheral device.
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30. A peripheral device system which has a host equipment, a plurality of peripheral devices, and a plurality of switching devices for forming a communication path therebetween, comprising:
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first output means for outputting a signal representing a power supply state which indicates if its own power supply is ON or OFF from each of said plurality of peripheral devices;
input means for receiving a signal representing a power supply state which indicates if a power supply of a peripheral device connected to a line on the peripheral device side is ON or OFF, in each of said plurality of switching devices;
supply means for supplying electric power to the switching device when the signal indicates the ON power supply state; and
second output means for outputting the supply state of electric power by said supply means onto a line on the host equipment side as the power supply state of the switching device. - View Dependent Claims (31)
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32. A method of controlling a peripheral device system which has a host equipment, a plurality of peripheral devices, and a plurality of switching devices for forming a communication path therebetween, comprising:
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the first output step of outputting a signal representing a power supply state which indicates if its own power supply is ON or OFF from each of said plurality of peripheral devices;
the input step of receiving a signal representing a power supply state which indicates if a power supply of a peripheral device connected to a line on the peripheral device side is ON or OFF, in each of said plurality of switching devices;
the supply step of supplying electric power to the switching device when the signal indicates the ON power supply state; and
the second output step of outputting the supply state of electric power by said supply means onto a line on the host equipment side as the power supply state of the switching device.
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33. A computer readable memory which stores a program code for controlling a peripheral device system which has a host equipment, a plurality of peripheral devices, and a plurality of switching devices for forming a communication path therebetween, comprising:
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a program code of the first output step of outputting a signal representing a power supply state which indicates if its own power supply is ON or OFF from each of said plurality of peripheral devices;
a program code of the input step of receiving a signal representing a power supply state which indicates if a power supply of a peripheral device connected to a line on the peripheral device side is ON or OFF, in each of said plurality of switching devices;
a program code of the supply step of supplying electric power to the switching device when the signal indicates the ON power supply state; and
a program code of the second output step of outputting the supply state of electric power by said supply means onto a line on the host equipment side as the power supply state of the switching device. - View Dependent Claims (35, 36, 37, 38, 39)
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34. A connection device for forming a communication path between a host equipment and a plurality of peripheral devices, comprising:
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holding means for holding a set identification number;
detection means for detecting identification information output from said host equipment;
determination means for determining based on the identification information detected by said detection means and the identification number held in said holding means if electric power is to be supplied; and
control means for controlling power supply to the peripheral device connected to said connection device on the basis of a determination result of said determination means.
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40. A method of controlling a connection device for forming a communication path between a host equipment and a plurality of peripheral devices, comprising:
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the holding step of holding a set identification number in a storage medium;
the detection step of detecting identification information output from said host equipment;
the determination step of determining based on the identification information detected in the detection step and the identification number held in the storage medium in the holding step if electric power is to be supplied; and
the control step of controlling power supply to the peripheral device connected to said connection device on the basis of a determination result in the determination step.
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41. A computer readable memory which stores a program code for controlling a connection device for forming a communication path between a host equipment and a plurality of peripheral devices, comprising:
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a program code of the holding step of holding a set identification number in a storage medium;
a program code of the detection step of detecting identification information output from said host equipment;
a program code of the determination step of determining based on the identification information detected in the detection step and the identification number held in the storage medium in the holding step if electric power is to be supplied; and
a program code of the control step of controlling power supply to the peripheral device connected to said connection device on the basis of a determination result in the determination step.
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42. A peripheral device system which has a host equipment, a plurality of peripheral devices, and a plurality of switching devices for forming a communication path therebetween, comprising:
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holding means for holding an identification number set in the connected peripheral device in each of said plurality of switching devices;
detection means for detecting identification information output from said host equipment;
determination means for determining based on the identification information detected by said detection means and the identification number held in said holding means if electric power is to be supplied; and
control means for controlling power supply to the peripheral device connected to said connection device on the basis of a determination result of said determination means. - View Dependent Claims (43, 44, 48, 49, 50, 51, 52, 53)
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45. A method of controlling a peripheral device system which has a host equipment, a plurality of peripheral devices, and a plurality of switching devices for forming a communication path therebetween, comprising:
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the holding step of holding, in a storage medium, an identification number equal to an identification number set in the connected peripheral device in each of said plurality of switching devices;
the detection step of detecting identification information output from said host equipment;
the determination step of determining based on the identification information detected in the detection step and the identification number held in the storage medium in the holding step if electric power is to be supplied; and
the control step of controlling power supply to the peripheral device connected to said connection device on the basis of a determination result in the determination step.
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46. A computer readable memory which stores a program code for controlling a peripheral device system which has a host equipment, a plurality of peripheral devices, and a plurality of switching devices for forming a communication path therebetween, comprising:
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a program code of the holding step of holding, in a storage medium, an identification number equal to an identification number set in the connected peripheral device in each of said plurality of switching devices;
a program code of the detection step of detecting identification information output from said host equipment;
a program code of the determination step of determining based on the identification information detected in the detection step and the identification number held in the storage medium in the holding step if electric power is to be supplied; and
a program code of the control step of controlling power supply to the peripheral device connected to said connection device on the basis of a determination result in the determination step.
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47. A connection device for connecting a plurality of peripheral devices to a single information output device, comprising:
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a first communication path which is connected to an input-side device, output-side device, and a peripheral device, receives information to be processed by the peripheral device from the input-side device, and outputs the information to be processed to the peripheral device and the output-side device;
a second communication path used for making a communication of control information between the input-side device and the peripheral device;
determination means for trying a communication with the input-side device using said second communication path, and determining based on the trial result if the communication of the control information is to be made; and
path control means for forming said second communication path between the input-side device and the peripheral device when said determination means determines that the communication of the control information is to be made.
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54. A peripheral device for processing data to be processed output from an information processing apparatus, comprising:
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first communication means for receiving the data to be processed;
second communication means for making a communication of control information with said information processing apparatus;
determination means for observing a communication state of said second communication means, and determining based on the communication state if the communication of the control information is to be executed; and
control means for making the communication of the control information with said information processing apparatus via said second communication means when said determination means determines that the communication of the control information is to be executed. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62)
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63. A method of controlling a connection device which comprises a first communication path which is connected to an input-side device, output-side device, and a peripheral device, receives information to be processed by the peripheral device from the input-side device, and outputs the information to be processed to the peripheral device and the output-side device, and a second communication path used for making a communication of control information between the input-side device and the peripheral device, comprising:
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the determination step of trying a communication with the input-side device using said second communication path, and determining based on the trial result if the communication of the control information is to be made; and
the path control step of forming said second communication path between the input-side device and the peripheral device when it is determined in the determination step that the communication of the control information is to be made.
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64. A computer readable memory which stores a program code for controlling a connection device which comprises a first communication path which is connected to an input-side device, output-side device, and a peripheral device, receives information to be processed by the peripheral device from the input-side device, and outputs the information to be processed to the peripheral device and the output-side device, and a second communication path used for making a communication of control information between the input-side device and the peripheral device, comprising:
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a program code of the determination step of trying a communication with the input-side device using said second communication path, and determining based on the trial result if the communication of the control information is to be made; and
a program code of the path control step of forming said second communication path between the input-side device and the peripheral device when it is determined in the determination step that the communication of the control information is to be made.
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65. A method of controlling a peripheral device which comprises first communication means for receiving data to be processed, and second communication means for making a communication of control information with an information processing apparatus, and processes the data to be processed output from said information processing apparatus, comprising:
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the determination step of observing a communication state of said second communication means, and determining based on the communication state if the communication of the control information is to be executed; and
the control step of making the communication of the control information with said information processing apparatus via said second communication means when it is determined in the determination step that the communication of the control information is to be executed.
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66. A computer readable memory which stores a program code for controlling a peripheral device which comprises first communication means for receiving data to be processed, and second communication means for making a communication of control information with an information processing apparatus, and processes the data to be processed output from said information processing apparatus, comprising:
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a program code of the determination step of observing a communication state of said second communication means, and determining based on the communication state if the communication of the control information is to be executed; and
a program code of the control step of making the communication of the control information with said information processing apparatus via said second communication means when it is determined in the determination step that the communication of the control information is to be executed. - View Dependent Claims (68, 69)
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67. A peripheral device system for connecting a single information processing apparatus and a plurality of peripheral devices via a plurality of connection devices, comprising:
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communication control means for transmitting data to be processed by the peripheral device from said information processing apparatus to each of said plurality of peripheral devices;
selection means for selecting one peripheral device which executes a communication of control information between said information processing apparatus and the peripheral device from said plurality of peripheral devices; and
communication control means for permitting the peripheral device selected by said selection means to execute the communication of the control information with said information processing apparatus, and inhibiting other peripheral devices from executing communication of the control information.
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70. A method of controlling a peripheral device system for connecting a single information processing apparatus and a plurality of peripheral devices via a plurality of connection devices, comprising:
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the communication control step of transmitting data to be processed by the peripheral device from said information processing apparatus to each of said plurality of peripheral devices;
the selection step of selecting one peripheral device which executes a communication of control information between said information processing apparatus and the peripheral device from said plurality of peripheral devices; and
the communication control step of permitting the peripheral device selected in the selection step to execute the communication of the control information with said information processing apparatus, and inhibiting other peripheral devices from executing communication of the control information.
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71. A computer readable memory which stores a program code for controlling a peripheral device system for connecting a single information processing apparatus and a plurality of peripheral devices via a plurality of connection devices, comprising:
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a program code of the communication control step of transmitting data to be processed by the peripheral device from said information processing apparatus to each of said plurality of peripheral devices;
a program code of the selection step of selecting one peripheral device which executes a communication of control information between said information processing apparatus and the peripheral device from said plurality of peripheral devices; and
a program code of the communication control step of permitting the peripheral device selected in the selection step to execute the communication of the control information with said information processing apparatus, and inhibiting other peripheral devices from executing communication of the control information.
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Specification