IP Library › Granted Patent US 10,706,817
Granted Patent B2
US 10,706,817 · App. 16/146,910 · Granted Jul 7, 2020

Overdrive for electronic device displays

Inventors: Yingying Tang (Sunnyvale, CA); Chaohao Wang (Sunnyvale, CA); Sheng Zhang (Milpitas, CA); Yunhui Hou (San Jose, CA); Paolo Sacchetto (Cupertino, CA); Koorosh Aflatooni (Los Altos Hills, CA); Gokhan Avkarogullari (San Jose, CA); Guy Cote (Aptos, CA); Mahesh B. Chappalli (San Jose, CA); Peter F. Holland (Los Gatos, CA)
Assignee: Apple Inc.
G09G5/10G09G3/2007G09G3/3225G09G3/3648G09G3/3208G09G3/3607G09G2320/0242G09G2320/0252G09G2320/0285G09G2320/103G09G2340/16
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Quick Facts
Patent No.
US 10,706,817
App. No.
16/146,910
Granted
Jul 7, 2020
Kind
B2
Abstract

An electronic device is provided. The electronic device includes a display that is configured to show content that includes a plurality of frames. The plurality of frames includes a first frame that is associated with a pre-transition value. The plurality of frames also includes a second frame that is associated with a current frame value that corresponds to a first luminance. Additionally, the electronic device is configured to determine an overdriven current frame value corresponding to a second luminance that is greater than the first luminance. The electronic device is also configured to display the second frame using the overdriven current frame value.

Claims (45)

1. An electronic device, comprising:

a display configured to display content; and

one or more processors configured to:

identify a high contrast transition from a first gray level of a first frame of the content to a second gray level of a second frame of the content;

determine an overdrive over-compensation mitigation gray level based upon the high contrast transition;

identify a transition from the second frame of the content to a third frame of the content having a third gray level;

determine whether the first frame and second frame are respectively associated with a first frame rate and a second frame rate that are greater than or equal to a threshold rendering frame rate;

after determining whether the first frame and second frame are respectively associated with the first frame rate and the second frame rate, determine an overdrive gray level based upon the overdrive over-compensation mitigation gray level and the third gray level; and

cause the third frame of the content to be displayed at the overdrive gray level.

2. The electronic device of claim 1 , wherein the one or more processors are configured to determine the overdrive over-compensation mitigation gray level based on a delta between the first gray level and the second gray level.

3. The electronic device of claim 1 , comprising memory, wherein the electronic device is configured to store the overdrive over-compensation mitigation gray level in the memory as a replacement to the second gray level.

4. The electronic device of claim 1 , wherein the electronic device is configured to perform a brightness band adjustment such that a first maximum luminance of the display associated with the first frame is increased to a second maximum luminance of the display associated with the third frame.

5. The electronic device of claim 1 , wherein the one or more processors are configured to determine the overdrive gray level after determining that the first frame and second frame are respectively associated with the first frame rate and the second frame rate that are greater than or equal to the threshold rendering frame rate.

6. The electronic device of claim 1 , comprising a graphics processing unit, wherein the first frame rate and second frame rate are respectively associated with rates at which the graphics processing unit renders the first frame and the second frame.

7. The electronic device of claim 1 , wherein the threshold rendering frame rate is sixty hertz.

8. The electronic device of claim 1 , wherein the third frame is generated from image data associated with a third frame rate that is less than the threshold rendering frame rate.

9. The electronic device of claim 1 , wherein the one or more processors are configured to:

determine whether each frame of a threshold number of consecutive frames of the content is associated with a frame rate that is greater than or equal to the threshold rendering frame rate; and

in response to determining that each frame of the threshold number of consecutive frames of the content is associated with a frame rate that is greater than or equal to the threshold rendering frame rate, determine the overdrive gray level.

10. A method comprising:

determining that each frame of a number of frames of a plurality of frames is at or above a threshold frame rendering rate; and

in response to determining that each frame of the number of frames of the plurality of frames is at or above the threshold frame rendering rate, determining a first gray level for a first frame of the plurality of frames of content based on a second gray level associated with a second frame of content, wherein the second frame of content is included in the number of the plurality of frames of content.

11. The method of claim 10 , wherein:

each frame of the plurality of frames comprises a respective frame rendering rate; and

each frame rendering rate is associated with a scrolling speed of a display.

12. The method of claim 10 , wherein the threshold frame rendering rate is sixty hertz.

13. The method of claim 10 , wherein determining the first gray level comprises altering a third gray level associated with the first frame based on the third gray level and the second gray level.

14. The method of claim 10 , comprising a third frame of the plurality of frames associated with a second frame rendering rate, wherein the method comprises:

determining whether the second frame rendering rate is equal to or greater than the threshold frame rendering rate; and

inserting a fourth frame into the third frame when the second frame rendering rate is less than the threshold frame rendering rate.

15. The method of claim 10 , wherein the number of frames of the plurality of frames comprises three consecutive frames.

16. The method of claim 15 , wherein the first frame is not included in the number of frames of the plurality of frames.

17. An image processing system, comprising:

a remap look-up table configured to:

receive first frame data comprising a first gray level;

receive second frame data comprising a second gray level; and

determine an overdrive over-compensation mitigation gray level based on the first gray level and the second gray level;

an overdrive look-up table configured to:

receive third frame data comprising a third gray level;

receive the overdrive over-compensation mitigation gray level; and

determine an overdrive gray level based on the third gray level and the overdrive over-compensation mitigation gray level; and

one or more processors configured to perform a brightness band adjustment such that a first luminance of a display associated with the first frame data is increased to a second luminance of the display associated with the third frame data.

18. The image processing system of claim 17 , comprising a driver integrated circuit configured to cause the display to display a frame of content based on the third frame data and the overdrive gray level.

19. The image processing system of claim 17 , wherein the overdrive over-compensation mitigation gray level is different than the first gray level and the second gray level.

20. The image processing system of claim 17 , wherein the one or more processors are configured to generate the first frame data, second frame data, and third frame data.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2019
From: TANG, YINGYING; WANG, CHAOHAO; ZHANG, SHENG; HOU, YUNHUI; SACCHETTO, PAOLO; AFLATOONI, KOOROSH; AVKAROGULLARI, GOKHAN; COTE, GUY; CHAPPALLI, MAHESH B.; HOLLAND, PETER F.
To: APPLE INC.
Reel/Frame 047951/0616 →
Continuity (3)
Continuation In Part 15967892 · May 1, 2018
Provisional Application 62552994 · Aug 31, 2017
Related Publication 20190122636A1 · Apr 25, 2019
Cited By (2)
US 12,249,271 US 12,451,078