Automated coherent clock synthesis for matrix display

Claim 1

A method for generating a clock signal for a matrix type display, from signals provided by a graphics source, comprising the steps of: providing a video output in the form of a plurality of video output signals associated with a raster type display, in which the video output signals define original images that are referenced to an input clock having a predetermined frequency and a predetermined phase; encoding at least one of the video output signals with clock information which define the frequency and the phase of the input clock to provide a clock-encoded video output signal; transmitting the clock-encoded video output signal to a display which includes a clock decoding circuit; supplying the clock-encoded video output signal to the clock decoding circuit and producing a replicated clock signal having said predetermined frequency and said predetermined phase; and supplying said replicated clock signal and said plurality of video output signals to said matrix type display and reproducing therewith said original images; providing an extraction and decoding circuit and producing therewith a reconstituted version of at least one of said video signals free of said clock information; and using a phase locked loop which is coupled to the reconstituted horizontal sync signal and which responds to another signal to produce the replicated clock signal; wherein the plurality of video output signals include RGB video signals, a vertical sync signal and a horizontal sync signal; and wherein the clock information is encoded within one signal period of the horizontal sync signal.

Claim 2

A method for generating a clock signal for a matrix type display, from signals provided by a graphics source, comprising the steps of: providing a video output in the form of a plurality of video output signals associated with a raster type display, in which the video output signals define original images that are referenced to an input clock having a predetermined frequency and a predetermined phase; encoding at least one of the video output signals with clock information which define the frequency and the phase of the input clock to provide a clock-encoded video output signal; transmitting the clock-encoded video output signal to a display which includes a clock decoding circuit; supplying the clock-encoded video output signal to the clock decoding circuit and producing a replicated clock signal having said predetermined frequency and said predetermined phase; and supplying said replicated clock signal and said plurality of video output signals to said matrix type display and reproducing therewith said original images; providing an extraction and decoding circuit and producing therewith a reconstituted version of at least one of said video signals free of said clock information; and using a phase locked loop which is coupled to the reconstituted horizontal sync signal and which responds to another signal to produce the replicated clock signal; wherein the plurality of video output signals include RGB video signals, a vertical sync signal and a horizontal sync signal; and wherein the clock information is encoded within one signal period of the horizontal sync signal.

Claim 4

A system for generating a clock signal for a matrix type display, from signals provided by a graphic source, comprising: an interface for receiving a video output in the form of a plurality of video output signals associated with a raster type display, in which the video output signals define original images that are referenced to an input clock having a predetermined frequency and a predetermined phase, wherein at least one of the video output signal is encoded with clock information which define the clock frequency and phase of the input clock to provide a clock-encoded video output signal; a decoding circuit for receiving the clock-encoded video output signal and for producing therefrom a signal containing said clock information; a clock generating circuit responsive to the decoding circuit for producing a replicated clock signal having said predetermined frequency and said predetermined phase, wherein the clock generating circuit comprises a phase locked loop; and a matrix display responsive to said plurality of video output signals and to said replicated clock signal for reproducing said original images.

Claim 5

A system for generating a clock signal for a matrix type display, from signals provided by a graphic source, comprising: an interface for receiving a video output in the form of a plurality of video output signals associated with a raster type display, in which the video output signals define original images that are referenced to an input clock having a predetermined frequency and a predetermined phase, wherein at least one of the video output signal is encoded with clock information which define the clock frequency and phase of the input clock to provide a clock-encoded video output signal; a decoding circuit for receiving the clock-encoded video output signal and for producing therefrom a signal containing said clock information; a clock generating circuit responsive to the decoding circuit for producing a replicated clock signal having said predetermined frequency and said predetermined phase, wherein the clock generating circuit comprises a phase locked loop; and a matrix display responsive to said plurality of video output signals and to said replicated clock signal for reproducing said original images.