US 2013/0155091 A1 · Color Adjustment Device, Method for Adjusting Color and Display for the Same

Abstract

The present invention provides a color adjustment device, a method of adjusting color and a display device for the same. In the beginning, it measures a plurality of tristimulus sets at various white grayscales on a LCD panel, converts the multiple tristimulus sets into a plurality of chromatic sets (xn, yn). After then, among the plurality of chromatic sets (xn, yn), it recognizes the Pth chromatic set (xp, yp), the break point, and based on the pth chromatic set (xp, yp), determines a plurality of target chromatic sets (Nxn, Nyn) at from the grayscale 0 to the grayscale p, where Nx n = x 0 + ( x 255 - x 0 ) · [ 1 - exp  ( 1 - p n ) ] ,  Ny n = y 0 + ( y 255 - y 0 ) · [ 1 - exp  ( 1 - p n ) ] . By this method, an exponential function instead of a linear function is adopted to depict the chromatic variation at low grayscales. Thus the grayscale variation appears more smooth and without any obvious break point in human's perception.

Claims13

Dependent claims

A method of adjusting color, characterized in that:

the method comprises:
measuring a plurality of tristimulus sets at various white grayscales on a LCD panel;
converting the plurality of tristimulus sets into a plurality of chromatic sets (xn, yn), where n=0, 1, 2, . . . , 255;
among the plurality of chromatic sets, judging a pth chromatic set (xp, yp) as a breakpoint, where xp−1−xp<0, xp−xp+1=0, yp−1−yp<0, yp−yp+1=0;
and
based on the pth chromatic set (xp, yp), determining a plurality of target chromatic sets (Nxn, Nyn) at from the grayscale 0 to the grayscale p, where
Nx
n
=
x
0
+
(
x
255
-
x
0
)
·
[
1
-
exp

(
1
-
p
n
)
]
,

Ny
n
=
y
0
+
(
y
255
-
y
0
)
·
[
1
-
exp

(
1
-
p
n
)
]
,
n=0, 1, . . . , p and exp denotes to an exponential function.

59 more elements

A color adjusting device, characterized in that:

the color adjusting device comprises:
a measurement unit for measuring a plurality of tristimulus sets at various white grayscales on a LCD panel;
a first conversion unit, connected to the measurement unit, for converting the plurality of tristimulus sets into a plurality of chromatic sets (xn, yn), n=0, 1, 2, . . . , 255;
a judging unit, connected to the first conversion unit, for recognizing a pth chromatic set (xp, yp), that is, a break point, where xp−1−xp<0, xp−xp+1=0, yp−1−yp<0, yp−yp+1=0;
a determining unit, connected to the judging unit, for determining a plurality of target chromatic sets (Nxn, Nyn) at from the grayscale 0 to the grayscale p, where
Nx
n
=
x
0
+
(
x
255
-
x
0
)
·
[
1
-
exp

(
1
-
p
n
)
]
,

Ny
n
=
y
0
+
(
y
255
-
y
0
)
·
[
1
-
exp

(
1
-
p
n
)
]
,
n=0, 1, . . . , p, and exp denotes to an exponential function;
a second conversion unit, connected to the determining unit, for converting the plurality of target chromatic sets (Nxn, Nyn) into a plurality of target tristimulus sets, each grayscale corresponding to one of the target tristimulus set, and each target stimulus set comprising three stimulus values;
and
a calculation unit, connected to the second conversion unit, for calculating a RGB ratios set corresponding to the tristimulus values of each target tristimulus set.

61 more elements

A display comprising a liquid crystal display (LCD) panel, the LCD panel comprising a plurality of pixels for displaying an image, each pixel comprising a plurality of sub-pixels, characterized in that:

the display further comprises a color adjustment device, the color adjustment device comprising:
a measurement unit for measuring a plurality of tristimulus sets at various white grayscales on a LCD panel;
a first conversion unit, connected to the measurement unit, for converting the plurality of tristimulus sets into a plurality of chromatic sets (xn, yn), n=0, 1, 2, . . . , 255;
a judging unit, connected to the first conversion unit, for recognizing a pth chromatic set (xp, yp), that is, a break point, where xp−1−xp<0, xp−xp+1=0, yp−1−yp<0, yp−yp+1=0;
a determining unit, connected to the judging unit, for determining a plurality of target chromatic sets (Nxn, Nyn) at from the grayscale 0 to the grayscale p, where
Nx
n
=
x
0
+
(
x
255
-
x
0
)
·
[
1
-
exp

(
1
-
p
n
)
]
,

Ny
n
=
y
0
+
(
y
255
-
y
0
)
·
[
1
-
exp

(
1
-
p
n
)
]
,
n=0, 1, . . . , p, and exp denotes to an exponential function;
a second conversion unit, connected to the determining unit, for converting the plurality of target chromatic sets (Nxn, Nyn) into a plurality of target tristimulus sets, each grayscale corresponding to one of the target tristimulus set, and each target stimulus set comprising three stimulus values;
and
a calculation unit, connected to the second conversion unit, for calculating a RGB ratios set corresponding to the tristimulus values of each target tristimulus set.

61 more elements

Dependencies are inferred from the claim text.

Color Adjustment Device, Method for Adjusting Color and Display for the Same

Life of this patent

Color Adjustment Device, Method for Adjusting Color and Display for the Same

Life of this patent

Abstract

Claims13