Display system

• US 10,290,288 B2
• Filed: 11/26/2014
• Issued: 05/14/2019
• Est. Priority Date: 12/18/2013
• Status: Active Grant

• Current Assignee: DisplayLink Corporation (Synaptics Incorporated)
• Original Assignee: DisplayLink Corporation (Synaptics Incorporated)
• Inventors: Hamaker, Eric Kenneth
• Primary Examiner(s): Lhymn, Sarah
• Application Number:
  US15/106,201
• Publication Number:
  US 20160351172A1
• Time in Patent Office: 1,630 Days
• Field of Search: 345619, 345629, 345630, 345631, 345634, 345635, 345636, 345637, 345638, 345641
• CPC Class Codes: G09G 2310/04 Partial updating of the display screen
• CPC Class Codes: G09G 2340/12 Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
• CPC Class Codes: G09G 2350/00 Solving problems of bandwidth in display systems
• CPC Class Codes: G09G 2360/02 Graphics controller able to handle multiple formats, e.g. input or output formats
• CPC Class Codes: G09G 2360/127 Updating a frame memory using a transfer of data from a source area to a destination area
• CPC Class Codes: G09G 2370/20 Details of the management of multiple sources of image data
• CPC Class Codes: G09G 5/005 Adapting incoming signals to the display format of the display terminal
• CPC Class Codes: G09G 5/377 for mixing or overlaying two or more graphic patterns G09G5/02, G09G5/397 take precedence
• CPC Class Codes: G09G 5/393 Arrangements for updating the contents of the bit-mapped memory

Abstract

A display system for displaying images includes an image compositor which receives image tiles from different application engines independently from each other and combines them into one or more combined image tiles in which the received image tiles are combined according to information indicating how the received image tiles are to be combined and located in the final displayed image, and a monitor for displaying the final displayed image, wherein different portions of the monitor are refreshed at different refresh rates, as the combined image tiles are received from the image compositor.

Claims

1. A display system for displaying a final displayed image formed of a plurality of image tiles which combine to form the final displayed image, each image tile comprising a plurality of pixels, the display system comprising a plurality of application engines, an image compositor and a monitor for displaying the final displayed image, the image compositor having a plurality of inputs coupled to outputs of the plurality of application engines and configured to receive image tiles generated by the plurality of application engines, the image tiles from different application engines being received independently from each other and at independent rates, wherein each image tile forms part of a complete image, wherein the image compositor comprises a processor for combining the received image tiles into one or more combined image tiles in which the received image tiles are combined according to information indicating how the received image tiles are to be combined and located in the final displayed image, the image compositor further comprising an output for outputting each of the one or more combined image tiles together with information indicating where the one or more combined image tiles are to be located in the final displayed image, wherein the one or more combined image tiles are individually transported from the image compositor for rendering on the monitor, wherein the received one or more combined image tiles are passed to a monitor router for routing to their location in the final displayed image according to the information indicating where the one or more combined image tiles are to be located, wherein individual of the one or more combined image tiles are sent at different times to the monitor for display, so that different portions of the monitor are refreshed at different refresh rates, as the one or more combined image tiles are received from the image compositor, wherein the one or more combined image tiles that are received may update any portion of the final displayed image and the portions of the final displayed image that are refreshed are refreshed in any order, wherein a refresh rate of the monitor is independent from an update rate of the application engine that generated a respective image tile and is independent of a refresh rate of the different portions of the image using the one or more combined image tiles, wherein the received one or more combined image tiles are also passed for storage in a buffer in the monitor, the monitor comprising a tile refresh controller that is configured to maintain a record of which image tiles in the final displayed image have been refreshed, take the stored one or more combined image tiles from the buffer and pass the stored one or more combined image tiles to the monitor router for routing to its location in the final displayed image according to the information indicating where the one or more combined image tiles are to be located, so that all image tiles in the final displayed image are refreshed periodically, whereby locations in the final displayed image on the display are refreshed at different refresh rates.

2. The display system of claim 1, wherein the monitor comprises a plurality of pixels, each pixel being individually addressable and controllable, and a pixel memory for each pixel of the monitor for storing a power level for the respective pixel, wherein the pixel memories are updated according to the location of the corresponding pixel of the monitor and the refresh rate for that location of the monitor.

3. The display system of claim 1, wherein only a portion of the monitor is refreshed at each update.

4. The display system of claim 3, wherein the portion of the image that is refreshed comprises one or more image tiles, each image tile comprising a plurality of pixels.

5. The display system of claim 1, wherein the one or more combined image tiles provided by the image compositor are compressed prior to being transported to the monitor, and are decompressed prior to being displayed at the monitor.

6. A display system for displaying a final image on a monitor, the final image being formed of a plurality of image tiles which combine to form the final image, each image tile comprising a plurality of pixels, the display system comprising an image tile generator for providing updates of each of the plurality of image tiles, the image tile updates being provided independently from each other and at independent rates, and a monitor for displaying the final image, wherein the received image tile updates are passed to a monitor router for routing to their location in the final image according to information indicating where the image tile update is to be located, wherein the final image is displayed on the monitor by refreshing different portions of the monitor at different rates according to the rate at which the image tile updates are provided by the image generator, wherein the refreshed portions of the final image may be located anywhere on the monitor, wherein the image tile updates that are received may update any portion of the final image and the refreshed portions of the final image are refreshed in any order, wherein a refresh rate of the monitor is independent a refresh rate of the refreshed portions of the image using the image tile updates, wherein the received image tile updates are also passed for storage in a buffer in the monitor, the monitor comprising a tile refresh controller that is configured to maintain a record of which image tiles in the final displayed image have been refreshed, take the stored image tile updates from the buffer and pass the stored image tile update to the monitor router for routing to its location in the final displayed image according to the information indicating where the image tile update is to be located, so that all image tiles in the final displayed image are refreshed periodically, whereby locations in the final displayed image on the display are refreshed at different refresh rates.

7. The display system of claim 6, wherein the monitor comprises a plurality of pixels, each pixel being individually addressable and controllable, and a pixel memory for each pixel on the monitor for storing a power level for the respective pixel, wherein the pixel memories are updated according to the location of the corresponding pixel on the monitor and the refresh rate for that portion of the image displayed on the monitor.

8. The display system of claim 6, wherein the portions of the image that are refreshed comprise one or more image tiles, each image tile comprising a plurality of pixels.

9. The display system of claim 6, wherein the image tile updates provided by the image tile generator are compressed prior to being transported to the monitor, and are decompressed prior to being displayed at the monitor.

10. A method of displaying a final image on a monitor, the final image being formed of a plurality of image tiles which combine to form the final displayed image, each image tile comprising a plurality of pixels, the monitor comprising a plurality of pixels, each pixel being individually addressable and controllable, and a pixel memory for each pixel on the monitor for storing a power level for the respective pixel, the method comprising:

receiving an update of each of the plurality of image tiles, the image tile update comprising display information indicating where each image tile is to be located in the final image on the monitor, the image tile updates being received independently from each other and at independent rates;

determining a location of the image tile on the monitor from the information indicating where each image tile is to be located; and

addressing one or more pixels displaying that image tile to control the pixel memories of the one or more pixels according to the display information to display that image tile,

wherein successive image tile updates that are received may refresh any portion of the final image, whereby different portions of the final image may be refreshed at different rates, wherein the image tile updates that are received may update any portion of the final image and the portions of the final image that are refreshed are refreshed in any order, wherein a refresh rate of the monitor is independent from a refresh rate of the different portions of the image using the image tile updates,

wherein the received image tile updates are also passed for storage in a buffer in the monitor, the monitor comprising a tile refresh controller that is configured to maintain a record of which image tiles in the final image have been refreshed, take the stored image tile updates from the buffer and pass the stored image tile update to the monitor router for routing to its location in the final image according to the information indicating where the image tile update is to be located, so that all image tiles in the final image are refreshed periodically, whereby locations in the final image on the display are refreshed at different refresh rates.

11. The method of claim 10, wherein the pixel memories are updated according to the location of the corresponding pixel on the monitor and the refresh rate for that portion of the final image displayed on the monitor.

12. The method of claim 10, wherein the portions of the final image that are refreshed comprise one or more image tiles, each image tile comprising a plurality of pixels.

13. The method of claim 10, wherein the received image tile updates are compressed and the method further comprises decompressing the image tile updates prior to the addressing the one or more pixels.

14. The method of claim 10, further comprising:

receiving image tiles generated by a plurality of application engines; and

combining the received image tiles to produce the image tile updates according to information indicating how the received image tiles are to be combined and located in the final image.

15. The method of claim 14, wherein each of the plurality of application engines generates the image tiles at a rate depending on an application being executed by a respective application engine.

16. The method of claim 14, wherein the image tiles are received directly from the plurality of application engines by an image compositor and the image tile updates are sent directly from the image compositor to a transport mechanism for transporting the image tile updates to the monitor.

17. The method of claim 16, further comprising compressing, encrypting, and/or encoding the image tile updates prior to being transported to the monitor.