Video switching device configured to provide at least part of a first video component from a first video source and second video component to a target video destination

• US 8,405,777 B2
• Filed: 02/14/2011
• Issued: 03/26/2013
• Est. Priority Date: 01/05/2002
• Status: Expired due to Fees

• Current Assignee: Belkin International Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Belkin International Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: King, Randy J., Voll, Parker J.
• Primary Examiner(s): NGUYEN BA, HOANG VU A
• Application Number:
  US13/027,115
• Publication Number:
  US 20110134331A1
• Time in Patent Office: 771 Days
• Field of Search: 348/563, 348/564, 345/156, 345/698, 725/141
• US Class Current: 348/563
• CPC Class Codes: G06F 3/023 Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G09G 2370/24 Keyboard-Video-Mouse [KVM] switch

Abstract

A high speed video switch in a KVM system using discrete Radio Frequency (RF) switch circuits. The RF switch circuits are configured into a multiplexed circuit to route video signals from a selected host computer to a target monitor. Voltage converters are used to provide control signals of the proper voltage to the RF switch circuits. Peaking operational amplifiers are used to compensate for the roll-off effect caused by the video connectors. An On Screen Display (OSD) switch using the RF switches is used to rapidly switch between the OSD data and host computer video for display to the target operator control center monitor.

Claims

1. A video switching device comprising:

an emitting mechanism configured to emit a video select signal;

a converter having an input and an output, wherein the emitting mechanism is coupled to the input of the converter;

a switching mechanism comprising;

a control terminal;

a video input terminal; and

a video output terminal; and

a video generating mechanism configured to generate first video signals, wherein;

the video input terminal is configured to receive a video output of a first computer;

the output of the converter is coupled to the control terminal of the switching mechanism to control a switching of the switching mechanism;

the switching mechanism is configured to switch at least a portion of the video output of the first computer with the first video signals such that output video signals of the switching mechanism are displayable on at least one video screen with the first video signals displayed at a first portion of the at least one video screen and the video output of the first computer is displayed at a second portion of the at least one video screen; and

the first portion of the at least one video screen is different than the second portion of the at least one video screen.

2. The video switching device of claim 1, wherein:

the video generating mechanism is configured to generate at least one of text or graphics; and

the first video signals comprises the at least one of the text or the graphics.

3. The video switching device of claim 1, wherein:

the at least a portion of the video output of the first computer comprises a first red video component, a first green video component, and a first blue video component;

the switching mechanism is configured such that at least part of the first red video component, at least part of the first green video component, and at least part of the first blue video component are removed from the second portion of the at least one video screen when the video output of the first computer is displayed at the second portion of the at least one video screen.

4. The video switching device of claim 1, wherein:

the switching mechanism comprises one or more switches configured to switch between the at least a portion of the video output of the first computer and the first video signals.

5. A video switching device configured to provide at least part of a first video component from a first video source to a target video destination, the video switching device comprising:

a display generator configured to provide a second video component when a second video display is enabled;

a display switch configured to switch, when the second video display is enabled, between the first video component and the second video component to generate at least one portion of an output video data, wherein the second video display is configured to switch between the first video component and the second video component such that the first video component is switched on while the second video component is switched off; and

one or more output connectors configured to provide the output video data to the target video destination,

wherein;

the video display switch is further configured such that the output video data comprises the first video component when the second video display is not enabled.

6. The video switching device of claim 5, wherein:

the first video component comprises a first red video component, a first green video component, and a first blue video component;

the display switch is configured such that at least part of the first red video component, at least part of the first green video component, and at least part of the first blue video component are removed from the output video data when the second video display is enabled and replaced the at least part of the first red video component, the at least part of the first green video component, and the at least part of the first blue video component by the second video component.

7. The video switching device of claim 5, wherein:

the display switch comprises one or more switches configured to switch between the first video signal and the second video signal.

8. The video switching device of claim 7, wherein:

the display switch further comprises;

a controlling logic module configured to control the switching of the one or more switches.

9. The video switching device of claim 7, wherein:

the one or more switches comprise one or more radio frequency switches.

10. The video switching device of claim 5, wherein:

the display switch is further configured such that the output video data has a video rate of up to 2048×

1536 at approximately 85 Hertz.

11. The video switching device of claim 5, wherein:

the display switch is configured to switch, when the second video display is enabled, between the first video component and the second video component to generate at least one portion of one or more horizontal lines of the output video data; and

the at least one portion of the output video signal comprises the at least one portion of one or more horizontal lines of the output video data.

12. The video switching device of claim 5, wherein:

the display switch is further configured to support a picture frequency greater than 250 megahertz for the output video data.

13. The video switching device of claim 5, wherein:

the video switching device comprises a keyboard, video, mouse switching device.

14. The video switching device of claim 5, wherein:

the display generator is configured to generate at least one of text or graphics; and

the second video component comprises the at least one of the text or the graphics.

15. The video switching device of claim 5, wherein:

the display switch is configured to switch between the first video component and the second video component such that at least a first part of the first video component is not present in the at least one portion of an output video data and at least first part of the first video component is replaced with the second video component.

16. A keyboard, video, mouse switching device for routing at least part of first video data from two or more host computers to a target video destination, the keyboard, video, mouse switching device comprising:

one or more electrical connectors configured to receive the first video data from the two or more host computers;

one or more video multiplexers configured to received the first video data and generate computer video data by switching between the first video data from the two or more host computers;

a video display module configured to generate second video data; and

a video switch configured to receive the computer video data from the one or more video multiplexers and further configured to remove a first portion of the computer video data and insert the second data in place of the first portion of the output video data to create output video data.

17. The keyboard, video, mouse switching device of claim 16, wherein:

the video switch comprises one or more radio frequency switches.

18. The keyboard, video, mouse switching device of claim 16, wherein:

the one or more video multiplexers and the video switch are further configured such that the output video data has a video rate of up to 2048×

1536 at approximately 85 Hertz.

19. The keyboard, video, mouse switching device of claim 16, wherein:

the video switch is further configured to support a picture frequency greater than 250 megahertz for the output video data

20. The keyboard, video, mouse switching device of claim 16, wherein:

the video display module is configured to generate at least one of text or graphics; and

the second video data comprises the at least one of the text or the graphics.