KVM system for controlling computers and method thereof
First Claim
1. A system for connecting a console device including a keyboard, cursor control device and video monitor to a number of computers, the system comprising:
- a user-side circuit coupled to the console device for receiving electronic signals produced by the keyboard and cursor control device and for creating a data packet that includes the electronic signals;
a central crosspoint switch, coupled to the user-side circuits, including a number of inputs and a number of outputs, the central crosspoint switch receiving the data packets from one of the inputs and routing the data packets to one or more of the outputs;
a plurality of computer-side circuits coupled to the central crosspoint switch and the computers, for receiving the data packets transmitted from the central crosspoint switch and for supplying the data packets to one of the computers;
a menu generating unit for generating menu data;
a video signal generator for generating a first analog video signal from the menu data;
an analog-to-differential converter coupled to the video signal generator for transforming the first analog video signal into a differential video signal representing the menu data;
a first switching device, for selectively outputting the differential video signal representing the menu data or a real-time video signal from one of the computers to the video monitor;
an analog-to-digital convener to transform a second analog video signal into video data; and
a differential-to-analog converter to transform the real-time video signal into the second analog video signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for connecting a console device to computers comprising a graphic user interface menu apparatus for controlling the computers. The system comprises a user-side circuit, a central crosspoint switch, a plurality of computer-side circuits, a menu generating unit and a first switching device. The user-side circuit coupled to the console device receives electronic signals produced by the keyboard and cursor control device and creates a data packet. The central crosspoint switch is coupled to the user-side circuits, receives the data packets and routes the data packets. The computer-side circuits coupled to the central crosspoint switch and the computers receive the data packets from the central crosspoint switch for supplying the data packets to the computers. The menu generating unit generates a menu to be displayed. The first switching device alternately outputs a video signal of the menu data and a video signal from the computers to the video monitor according to a vertical synchronization signal.
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Citations
20 Claims
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1. A system for connecting a console device including a keyboard, cursor control device and video monitor to a number of computers, the system comprising:
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a user-side circuit coupled to the console device for receiving electronic signals produced by the keyboard and cursor control device and for creating a data packet that includes the electronic signals; a central crosspoint switch, coupled to the user-side circuits, including a number of inputs and a number of outputs, the central crosspoint switch receiving the data packets from one of the inputs and routing the data packets to one or more of the outputs; a plurality of computer-side circuits coupled to the central crosspoint switch and the computers, for receiving the data packets transmitted from the central crosspoint switch and for supplying the data packets to one of the computers; a menu generating unit for generating menu data; a video signal generator for generating a first analog video signal from the menu data; an analog-to-differential converter coupled to the video signal generator for transforming the first analog video signal into a differential video signal representing the menu data; a first switching device, for selectively outputting the differential video signal representing the menu data or a real-time video signal from one of the computers to the video monitor; an analog-to-digital convener to transform a second analog video signal into video data; and a differential-to-analog converter to transform the real-time video signal into the second analog video signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A graphic user interface menu apparatus applied in a connection between a console device including a keyboard, cursor control device and video monitor and a number of computers, the apparatus comprising:
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a menu generating unit for generating menu data; a video signal generator for generating a first analog video signal from the menu data; an analog-to-differential converter coupled to the video signal generator for transforming the first analog video signal into a differential video signal representing the menu data; and a first switching device, for selectively outputting the differential video signal representing the menu data or a real-time video signal from one of the computers to the video monitor; and a differential-to-analog converter to transform the real-time video signal into a second analog video signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for controlling a number of computers in a connection from a console device including a keyboard, cursor control device and video monitor, wherein the method comprising the steps of:
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generating menu data by a menu generating unit; generating a first analog video signal from the menu data; transforming the first analog video signal into a differential video signal representing the menu data; and outputting the differential video signal representing the menu data or a real-time video signal from one of the computers to the video monitor according to a vertical synchronization signal; transforming a second analog video signal into video data after a step of selecting one of the computers to output the video signal by an analog-to-digital converter; and transforming the real-time video signal into the second analog video signal before the step of transforming the second analog video signal into the video data by a differential-to-analog converter. - View Dependent Claims (19, 20)
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Specification