# US 2006/0248100 A1 · Video switch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2006/0248100 A1 - Document ID: US20060248100A1 - Status: Published application - Kind: A1 - Application number: 11/473,577 - Filed: 2006-06-22 - Published: 2006-11-02 - Earliest claimed: 2001-08-08 - Assignees: Adder Technology Limited - Inventors: Nigel Dickens; Adrian Dickens; William Haylock - Web page: https://patentgrep.com/patent/US20060248100A1 ## CPC - H04N 5/268: Signal distribution or switching - Y10S 707/99945: Object-oriented database structure processing - Y10S 707/99948: Application of database or data structure, e.g. distributed, multimedia, or image - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract There is provided video switching circuitry for use in a KVM switch and similar devices. Video signal switching circuitry can supply video signals from a one of a plurality of video sources connected to the circuit to a display device connected to the circuit. The high data signalling rate signals are converted into a greater number of lower data signalling rate signals for switching by a bus architecture. Also provided are video display systems in which analogue and digital video signals are switched synchronously to allow them to be displayed on common or separate display devices. Also described is a high-resolution monitor digital video data switching device. ## Claims ### Claim 1 Video signal switching apparatus for supplying video signals from a plurality of video sources connected to the apparatus to a display device connected to the apparatus, the apparatus including: a plurality of video signal deserialising devices each connectable to a one of the plurality of video sources and which convert digital video signals received from a one of the plurality of video sources into video signals having a lower data signalling rate; a video signal serialising device connectable to the display device; and a data transmission means including a switch and which connects the plurality of data deserialising devices to the serialising device, the serialising device converting the video signals into serialised digital video signals having a higher data signalling rate, and in which the data transmission means selectively provides a video signal path between the serialising device and a one of the plurality of deserialising devices. ### Claim 2 (depends on 1) Apparatus as claimed in claim 1, in which the data transmission means includes a common bus connected between the serialising device and switch. ### Claim 3 (depends on 1) Apparatus as claimed in claim 1, in which the data transmission means includes a plurality of busses, each connected between the switch and a respective one of the plurality of deserialising devices. ### Claim 4 (depends on 1) Apparatus as recited in claim 1 wherein the switch is a programmable logic device. ### Claim 5 (depends on 1) Apparatus as recited in claim 1 wherein the switch is a cross point switch. ### Claim 6 (depends on 1) Apparatus as recited in claim 1 wherein the data transmission means is configured so as to reduce timing skew between video signals being transmitted over the data transmission means. ### Claim 7 (depends on 1) Apparatus as recited in claim 1 wherein a part of the data transmission means is configured so as to have an impedance substantially the same as a video cable. ### Claim 8 (depends on 1) Apparatus as recited in claim 1 wherein the data transmission means switches all but one of the plurality of deserialising devices out of the video signal path. ### Claim 9 (depends on 1) Apparatus as recited in claim 1 wherein the digital video signals are DVI signals. ### Claim 10 (depends on 1) Apparatus as recited in claim 1 wherein the data transmission means transmits the lower data signalling rate video data in a parallel like manner. ### Claim 11 (depends on 1) Apparatus as recited in claim 1 further including a plurality of video signal serialising devices connected to the data transmission means, in which the data transmission means can provide a video signal path between any one of the plurality of the deserialising devices and any one of the plurality of video signal serialising devices. ### Claim 12 (depends on 1) Apparatus as recited in claim 1 wherein more than one link is provided to a video source connector. ### Claim 13 (depends on 1) Apparatus as recited in claim 1 wherein more than one link is provided to a display connector. ### Claim 14 (depends on 11) Apparatus as claimed in claim 11, in which the switch also supports a broadcast functionality in which a video signal path between a one of the plurality of deserialising devices and more than one of the serialising devices is provided. ### Claim at position 15 15-25. (canceled) ### Claim 26 Video signal switching apparatus for supplying a video signal from a video source connected to the apparatus to a plurality of display devices connected to the apparatus, the apparatus including: a video signal deserialising device connectable to the video source and which converts digital video signals received from the video source into video signals having a lower data signalling rate; a plurality of video signal serialising devices each connectable to a one of the plurality of display devices; and a data transmission means including a broadcaster and which connects the plurality of data serialising devices to the deserialising device, the serialising devices each converting the video signals into serialised digital video signals having a higher data signalling rate, and in which the broadcaster provides video signals to each of the serialising devices. ### Claim 27 (depends on 2) Apparatus as recited in claim 2 wherein the switch is a programmable logic device. ### Claim 28 (depends on 3) Apparatus as recited in claim 3 wherein the switch is a programmable logic device. ### Claim 29 (depends on 2) Apparatus as recited in claim 2 wherein the switch is a cross point switch. ### Claim 30 (depends on 3) Apparatus as recited in claim 3 wherein the switch is a cross point switch. ### Claim 31 (depends on 4) Apparatus as recited in claim 4 wherein the switch is a cross point switch.