Per-segment change detection for multi-segmented backlight

1 . An electronic device comprising:

a display panel that includes a segmented backlight having a plurality of segments; and

a display engine, wherein, for each segment in the segmented backlight, the display engine creates and communicates to the display panel an identifier that indicates if a brightness value of a specific segment in a current processed frame in a video stream will change from a brightness value of the specific segment in a last processed frame in the video stream.

2 . The electronic device of claim 1 , wherein track flip programming is at least partially used to determine if the brightness value of the specific segment in the segmented backlight will change from the brightness value of the specific segment in the last processed frame.

3 . The electronic device of claim 1 , wherein flip dirty-rectangle programming is at least partially used to determine if the brightness value of the specific segment in the segmented backlight will change from the brightness value of the specific segment in the last processed frame.

4 . The electronic device of claim 1 , wherein one or more planes that flipped in a multiple plane overlay are at least partially used to determine if the brightness value of the specific segment in the segmented backlight will change from the brightness value of the specific segment in the last processed frame.

5 . The electronic device of claim 1 , wherein track pipe/plane scaler usage to identify unchanged segments is at least partially used to determine if the brightness value of the specific segment in the segmented backlight will change from the brightness value of the specific segment in the last processed frame.

6 . The electronic device of claim 1 , wherein the identifier is communicated to the display panel using a secondary data packet in the video stream.

7 . The electronic device of claim 1 , wherein the display panel includes a timing controller (TCON) and the display engine communicates to the TCON a second identifier that indicates each segment in the segmented backlight where the brightness value of the segment in a next displayed frame will not change.

8 . The electronic device of claim 7 , wherein for each segment where the brightness value for the segment will not change in the next displayed frame, the brightness value of the segment for a current displayed frame is used.

9 . The electronic device of claim 1 , wherein the display engine determines a location of each segment in the segmented backlight using a display specification stored in the display panel.

10 . A method comprising:

determining a location of a plurality of backlight segments in a display panel;

determining changes to a current processed frame as compared to a last processed frame; and

determining backlight segments that include the changes of the current processed frame as compared to the last processed frame.

11 . The method of claim 10 , further comprising:

for each of the plurality of backlight segments, assigning an identifier that indicates if the backlight segment includes changes in the current processed frame as compared to the last processed frame, wherein the assigned identifier for each backlight segment is communicated from a display engine to a timing controller (TCON) using a secondary data packet.

12 . The method of claim 11 , wherein the TCON uses the assigned identifier for each backlight segment to determine if a brightness of a specific segment for a next displayed frame can be a same level as a brightness of the specific segment for a current displayed frame.

13 . The method of claim 10 , wherein track flip programming is at least partially used to determine the changes to the current processed frame as compared to the last processed frame.

14 . The method of claim 10 , wherein flip dirty-rectangle programming is at least partially used to determine the changes to the current processed frame as compared to the last processed frame.

15 . The method of claim 10 , wherein determining if any multiple plane overlay planes are flipped is at least partially used to determine the changes to the current processed frame as compared to the last processed frame.

16 . An electronic device comprising:

a display panel, wherein the display panel includes:

a liquid crystal display;

a backlight for the liquid crystal display, wherein the backlight includes a plurality of backlight segments;

a timing controller (TCON); and

a display engine located outside of the display panel, wherein the display engine communicates to the TCON an identifier for each of the plurality of backlight segments, wherein the identifier indicates if the backlight segment associated with the identifier includes changes of a next frame as compared to a current frame.

17 . The electronic device of claim 16 , wherein the display panel further includes a display specification and the display engine determines backlight segment dimensions of the plurality of backlight segments using the display specification.

18 . The electronic device of claim 16 , wherein the identifier for each of the plurality of backlight segments is communicated from the display engine to the TCON using a secondary data packet.

19 . The electronic device of claim 16 , wherein the TCON uses the identifier for each of the plurality of backlight segments to determine if a brightness of a specific backlight segment for the next frame can be a same level as a brightness of the specific backlight segment for the current frame.

20 . The electronic device of claim 16 , wherein the display panel can support high dynamic range.