US 10,896,635 B2Granted

Primary color conversion method and converter thereof, display control method, and display device

AssigneeBoe Technology Group Co., Ltd.

InventorsYanhui Xi, Bin Dai, Xiaomang Zhang, Yan Sun, Kuanjun Peng, Haijun Niu, Xiaolong Li, Donghui Wang

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Abstract

Disclosed is a primary color conversion method, which may expand primary color signals that are applicable to a display device. The primary color conversion method includes: acquiring color coordinates and a brightness value of a first color in a first color gamut having M primary colors according to gray-scale values of the M primary colors corresponding to the first color; and mapping the color coordinates and the luminance value of the first color in the first color gamut to color coordinates and a brightness value of a second color corresponding to the first color in a second color gamut having N primary colors. 3≤M, 3≤N, M is different from N, and M and N are positive integers.

Claims19

Dependent claims

A primary color conversion method, comprising:

obtaining color coordinates and a luminance value of a first color in a first color gamut having M primary colors according to gray-scale values of the M primary colors corresponding to the first color;
mapping the color coordinates and the luminance value of the first color in the first color gamut to color coordinates and a luminance value of a second color corresponding to the first color in a second color gamut having N primary colors, which includes:
obtaining a maximum luminance value Ymax(x, y) of the first color in the first color gamut;
obtaining a maximum luminance value Y1max(x1, y1) of the second color in the second color gamut;
and
obtaining a luminance value Y1(x1, y1) of the second color in the second color gamut according to a formula:
Y
⁡
(
x
,
y
)
Y
max
⁡
(
x
,
y
)
=
Y
1
⁡
(
x
⁢
⁢
1
,
y
⁢
⁢
1
)
Y
1
⁢
max
⁡
(
x
⁢
⁢
1
,
y
⁢
⁢
1
)
,
wherein Y(x, y) is a luminance value of the first color in the first color gamut;
3 is less than or equal to M, 3 is less than or equal to N, M is different from N, and M and N are both positive integers.

52 more elements

A primary color conversion method, comprising:

obtaining color coordinates and a luminance value of a first color in a first color gamut having M primary colors according to gray-scale values of the M primary colors corresponding to the first color;
mapping the color coordinates and the luminance value of the first color in the first color gamut to color coordinates and a luminance value of a second color corresponding to the first color in a second color gamut having N primary colors, which includes:
drawing a mapping line segment in a chromaticity diagram, the mapping line segment extending from a color coordinate point D of a white color to a color coordinate point A of the first color;
obtaining a first intersection point P between an extension line of the mapping line segment and a boundary of the first color gamut, and a second intersection point P1 between the extension line of the mapping line segment and a boundary of the second color gamut;
and
obtaining a color coordinate point A1 of the second color according to a formula:
D
⁢
⁢
A
D
⁢
⁢
P
=
D
⁢
⁢
A
⁢
⁢
1
D
⁢
⁢
P
1
,
the formula of mapping the color coordinate point A of the first color to the color coordinate point A1 of the second color being equal scale mapping, wherein
DA is a length of a line segment between the color coordinate point D of the white color and the color coordinate point A of the first color;
DP is a length of a line segment between the color coordinate point D of the white color and the first intersection point P;
DA1 is a length of a line segment between the color coordinate point D of the white color and the color coordinate point A1 of the second color;
and DP1 is a length of a line segment between the color coordinate point D of the white color and the second intersection point P1;
3 is less than or equal to M, 3 is less than or equal to N, M is different from N, and M and N are both positive integers.

31 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/482,107Filed 27 Sep 2018
Priority: CN 2017 1 133438813 Dec 2017
Published: US 2020/0226965 A116 Jul 2020
Granted: 19 Jan 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G09G 3/2003
For presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged…:…
G09G 3/3607
Using liquid crystals: for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
G09G 2300/0452
Pixel structures: details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
G09G 2320/0626
Adjustment of display parameters: for control of overall brightness