Sparse refresh of display
First Claim
Patent Images
1. A method, comprising:
- detecting a write command to a frame buffer;
determining a region in the frame buffer associated with a frame buffer address in the write command, wherein the region spans more than one row of pixels and wherein a shape of the region is configurable; and
determining whether the region is the same as a last-modified region for purposes of deciding whether to asynchronously send the region to a display device.
1 Assignment
0 Petitions
Accused Products
Abstract
A method, apparatus, and signal-bearing medium for sending to a display device modified regions of a frame buffer. A frame buffer is divided into the regions, and data in the frame buffer represents pixels on the display device. The frame buffer accumulates writes until the region being written to changes, at which time the region is copied to the display device.
28 Citations
19 Claims
-
1. A method, comprising:
-
detecting a write command to a frame buffer; determining a region in the frame buffer associated with a frame buffer address in the write command, wherein the region spans more than one row of pixels and wherein a shape of the region is configurable; and determining whether the region is the same as a last-modified region for purposes of deciding whether to asynchronously send the region to a display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An apparatus, comprising:
a graphics engine to; generate an asynchronous write command having an associated region in a frame buffer, wherein the region spans more than one row of pixels and wherein a shape of the region is configurable, determine whether scan-out logic is accessing the associated region in the frame buffer, and store the write command in memory associated with the graphics engine when the scan-out logic accesses the associated region in the frame buffer. - View Dependent Claims (10, 11)
-
12. A signal-bearing medium comprising instructions, which when read and executed by a processor comprise:
-
accumulating writes by a graphics engine to one of a plurality of regions in a frame buffer, wherein the plurality of regions represent respective pixels on a display device which spans more than one row of pixels and shapes of the regions are configurable; detecting that the graphics engine has written to another region of the plurality of regions in the frame buffer; and in response to the detecting, causing the one region to be written to the display device. - View Dependent Claims (13, 14)
-
-
15. An electronic device, comprising:
a graphics engine to, for every respective modified region in a set of candidate regions, asynchronously copy the respective modified region from a frame buffer to a display, when the respective modified region was written to during the copy, mark the respective modified region as modified, and when the respective modified region was not written to during the copy, mark the respective modified region as not modified, wherein the modified and candidate regions span more than one row of pixels and have shapes which are configurable. - View Dependent Claims (16, 17, 18, 19)
Specification