Intelligent display interface
First Claim
Patent Images
1. A method, comprising:
- identifying, by a video controller, a first updated portion of first video image data that has changed since a previous transmission to a first display device;
transmitting the first updated portion of the first video image data from the video controller to the first display device;
identifying, by the video controller, a second updated portion of second video image data that has changed since a previous transmission to a second display device; and
transmitting the second updated portion of second video image data from the video controller to the second display device,wherein the first updated portion and the second updated portion are transmitted over a shared communication channel coupled between the video controller, the first display device and the second display device.
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Abstract
A video display system that co-locates a video display memory with the video display device, and transmits to the display device those portions of the image data that have changed rather than continually updating the entire video image. Each display device is addressable, allowing multiple display devices showing different images to be updated through a single display controller port over a single bus or over a single daisy-chain connection. The image data can be updated synchronously or asynchronously, and display devices using different formats can share the same bus or cable.
35 Citations
25 Claims
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1. A method, comprising:
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identifying, by a video controller, a first updated portion of first video image data that has changed since a previous transmission to a first display device; transmitting the first updated portion of the first video image data from the video controller to the first display device; identifying, by the video controller, a second updated portion of second video image data that has changed since a previous transmission to a second display device; and transmitting the second updated portion of second video image data from the video controller to the second display device, wherein the first updated portion and the second updated portion are transmitted over a shared communication channel coupled between the video controller, the first display device and the second display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 16, 17, 18)
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8. A system, comprising:
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a shared communication channel; a first display device coupled to the shared communication channel and having a first video memory contained within the first display device; a second display device coupled to the shared communication channel and having a second video memory contained within the second display device; and a video controller coupled to the shared communication channel to transmit an identified, first updated portion of first video image data that has changed since a previous transmission to the first display device over the shared communication channel to the first display device, and to transmit an identified, second updated portion of second video image data that has changed since a previous transmission to the second display device over the shared communication channel to the second display device. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 19, 20, 21, 22, 23, 24, 25)
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Specification