Display module, electronic device and method of compensating for color shift of display panel
View Patent ↗Disclosed is a method of compensating for a color shift of a display panel, a display module, and an electronic device, in which the method includes: in the case where a color shift occurs in a white screen of the display panel, determining a position where the color shift occurs; changing a timing of sub-pixels lighting the white screen in the position to a timing of red, green and blue pixels; adjusting brightness of the red pixel, brightness of the green pixel and brightness of the blue pixel to compensate for the color shift in the position. The present disclosure solves the technical problem that a color shift repairing technology in the related art can only solve unevenness of brightness within a certain range, resulting in poor repairing effect of the display panel.
1. A method of compensating for a color shift of a display panel, comprising:
when a color shift occurs in a white screen of the display panel, determining a position where the color shift occurs;
changing a timing of sub-pixels lighting the white screen in the position to a timing of red, green and blue pixels; and
adjusting brightness of the red pixel, brightness of the green pixel and brightness of the blue pixel to compensate for the color shift in the position;
wherein adjusting brightness of the red pixel, brightness of the green pixel and brightness of the blue pixel to compensate for the color shift in the position comprises:
acquiring a first color coordinate of the red pixel, a second color coordinate of the green pixel, a third color coordinate of the blue pixel, and a fourth color coordinate of the white pixel;
based on a driving current for driving sub-pixels as well as the first color coordinate, the second color coordinate, the third color coordinate and the fourth color coordinate, adjusting a sum of first brightness of the red pixel, second brightness of the green pixel and third brightness of the blue pixel to a preset threshold to compensate for the color shift in the position; and
the first color coordinate, the second color coordinate, the third color coordinate, the fourth color coordinate and the first brightness, the second brightness, the third brightness meet the following formulae:
L
R
=
y
R
[
(
y
W
-
y
G
)
(
x
B
-
x
W
)
+
(
x
W
-
x
G
)
(
y
W
-
y
B
)
]
y
B
[
(
y
W
-
y
g
)
(
x
W
-
x
R
)
+
(
x
W
-
x
G
)
(
y
R
-
y
W
)
]
L
B
L
G
=
y
G
(
y
R
-
y
W
)
[
(
y
W
-
y
G
)
+
(
x
W
-
x
G
)
(
y
W
-
y
B
)
]
+
(
y
B
-
y
W
)
[
(
y
W
-
y
G
)
(
x
W
-
x
R
)
+
(
x
W
-
x
G
)
(
y
R
-
y
W
)
]
y
B
(
y
W
-
y
G
)
⌋
(
y
W
-
y
G
)
(
x
W
-
x
R
)
+
(
x
W
-
x
G
)
(
y
R
-
y
W
)
]
L
B
wherein, (x R ,y R ) is the first color coordinate, (x G ,y G ) is the second color coordinate, (x B ,y B ) is the third color coordinate, (x W ,y W ) is the fourth color coordinate, L R is the first brightness, L G is the second brightness, and L B is the third brightness.
2. The method according to claim 1 , wherein a value of the preset threshold is a brightness value without color shift in the display panel.
3. The method according to claim 1 , wherein changing a timing of sub-pixels lighting the white screen in the position to a timing of red, green and blue pixels comprises:
determining the sub-pixels lighting the white screen in the position, wherein the sub-pixels lighting the white screen comprise a white pixel and one or two of the following sub-pixels: a red pixel, a green pixel and a blue pixel; and
changing the timing of the sub-pixels lighting the white screen to the timing of the red pixel, the green pixel and the blue pixel.
4. The method according to claim 1 , wherein determining a position where the color shift occurs comprises:
acquiring a current value of each pixel in the display panel; and
when the current value is not within a preset range, determining a position of the pixel corresponding to the current value as the position where the color shift occurs.
5. The method according to claim 4 , wherein acquiring a current value of each pixel in the display panel comprises:
detecting a current value of each pixel in the display panel based on a current detector, wherein the brightness of the pixel is proportional to the current value.
6. The method according to claim 1 , wherein determining a position where the color shift occurs comprises:
analyzing a brightness information of each position in the display panel based on an image detector, so as to determine the position where the brightness is less than the preset brightness value or greater than the preset brightness value as the position where the color shift occurs.
7. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus, wherein
the memory is configured to store a computer program; and
the processor is configured to implement the method steps in claim 1 when executing the computer program stored in the memory.
8. A display module comprising a display panel and a compensation module connected to the display panel, wherein the compensation module comprises:
a determining sub-module configured to determine a position where a color shift occurs when a color shift occurs in a white screen of the display panel;
a processing sub-module configured to change a timing of sub-pixels lighting the white screen in the position to a timing of red, green and blue pixels; and
an adjustment sub-module configured to adjust brightness of the red pixel, brightness of the green pixel and brightness of the blue pixel to compensate for the color shift in the position;
wherein the adjustment sub-module comprises:
an acquisition unit configured to acquire a first color coordinate of the red pixel, a second color coordinate of the green pixel, a third color coordinate of the blue pixel, and a fourth color coordinate of the white pixel;
an adjustment unit configured to adjust a sum of first brightness of the red pixel, second brightness of the green pixel and third brightness of the blue pixel to a preset threshold to compensate for the color shift in the position based on a driving current for driving sub-pixels and the first, second, third, and fourth color coordinates; and
the first color coordinate, the second color coordinate, the third color coordinate, and the fourth color coordinate meet the following formulae:
L
R
=
y
R
[
(
y
W
-
y
G
)
(
x
B
-
x
W
)
+
(
x
W
-
x
G
)
(
y
W
-
y
B
)
]
y
B
[
(
y
W
-
y
g
)
(
x
W
-
x
R
)
+
(
x
W
-
x
G
)
(
y
R
-
y
W
)
]
L
B
L
G
=
y
G
(
y
R
-
y
W
)
[
(
y
W
-
y
G
)
+
(
x
W
-
x
G
)
(
y
W
-
y
B
)
]
+
(
y
B
-
y
W
)
[
(
y
W
-
y
G
)
(
x
W
-
x
R
)
+
(
x
W
-
x
G
)
(
y
R
-
y
W
)
]
y
B
(
y
W
-
y
G
)
⌋
(
y
W
-
y
G
)
(
x
W
-
x
R
)
+
(
x
W
-
x
G
)
(
y
R
-
y
W
)
]
L
B
wherein, (x R ,y R ) is the first color coordinate, (x G ,y G ) is the second color coordinate, (x B ,y B ) is the third color coordinate, (x W ,y W ) is the fourth color coordinate, L R is the first brightness, L G is the second brightness, and L B is the third brightness.
9. The display module according to claim 8 , wherein the value of the preset threshold is a brightness value of the display panel without a color shift.
10. The display module according to claim 8 , wherein the adjustment unit comprises:
a determining sub-unit configured to determine the sub-pixels lighting the white screen in the position, wherein the sub-pixels lighting the white screen comprise a white pixel and one or two of the following sub-pixels: red, green and blue pixels; and
a processing sub-unit configured to change the timing of the sub-pixels lighting the white screen to the timing of red, green and blue pixels.
11. The display module according to claim 8 , wherein the determining sub-module comprises:
a processing unit configured to acquire a current value of each pixel in the display panel; and
a determining unit configured to determine the position of the pixel corresponding to the current value as the position where a color shift occurs when the current value is not within a preset range.
12. The display module according to claim 11 , wherein the processing unit comprises:
a current detector, configured to detect a value of each pixel in the display panel, wherein the brightness of the pixel is proportional to the current value.
13. The display module according to claim 8 , wherein the determining sub-module comprises:
an image detector configured to analyze the brightness information of each position in the display panel, so as to determine the position where the brightness is less than the preset brightness value or greater than the preset brightness value as the position where the color shift occurs.