Patent ID: 11875718
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A correction method for a color temperature curve, comprising:
obtaining a plurality of pixel values of a display device, wherein each pixel value includes gray scale values of at least three sub-pixels in a pixel, and the plurality of pixel values include at least two fir pixel values and a plurality of second pixel values;
obtaining at least two first standard pixel values according to the at least two first pixel values, wherein a color temperature value corresponding to each first standard pixel value is a standard color temperature value;
determining at least one correction interval according to the at least two first standard pixel values and the plurality of second pixel values, wherein a correction interval includes two first standard pixel values and at least two second pixel values therebetween; and
correcting the at least two second pixel values in the correction interval to obtain at least two second standard pixel values according to the two first standard pixel values, wherein a color temperature value corresponding to each second standard pixel value is within a preset color temperature range in which the standard color temperature value is located;
wherein obtaining the at least two first standard pixel values according to the at least two first pixel values, includes:
obtaining color temperature values corresponding to the at least two first pixel values;

determining whether the color temperature values corresponding to the at least two first pixel values are equal to the standard color temperature value;
using the at least two first pixel values as the at least two first standard pixel values, in response to determining that the color temperature values corresponding to the at least two first pixel values are equal to the standard color temperature value; and
correcting at least one first pixel value until a color temperature value corresponding to each first pixel value in the at least two first pixel values is equal to the standard color temperature value, in response to determining that at least one color temperature value corresponding to the at least one first pixel value is not equal to the standard color temperature value, so that the at least two first standard pixel values are obtained;

wherein correcting the at least two second pixel values in the correction interval to obtain the at least two second standard pixel values according to the two first standard pixel values, includes:
obtaining a second standard pixel value corresponding to each of the at least two second pixel values in the correction interval through linear interpolation according to the two first standard pixel values and each of the at least two second pixel values;
wherein obtaining the second standard pixel value corresponding to each of the at least two second pixel values in the correction interval through the linear interpolation according to the two first standard pixel values and each of the at least two second pixel values, includes:
obtaining a correction ratio coefficient of a gray scale value of each sub-pixel in each first standard pixel value, wherein the correction ratio coefficient of the gray scale value of each sub-pixel in the first standard pixel value is related to a gray scale value of each sub-pixel in the first standard pixel value and a gray scale value of a corresponding sub-pixel in the first pixel value corresponding to the first standard pixel value;
obtaining an interpolation step-size of a gray scale value of each sub-pixel in the second pixel value according to gray scale values of corresponding sub-pixels in the two first standard pixel values and the gray scale value of the sub-pixel in the second pixel value; and
obtaining the gray scale value of the sub-pixel in the second standard pixel value through the linear interpolation according to correction ratio coefficients of the gray scale values of the corresponding sub-pixels in the two first standard pixel values, the interpolation step-size of the gray scale value of the sub-pixel in the second pixel value, and the gray scale value of the sub-pixel in the second pixel value;
wherein the gray scale value of the sub-pixel in the second standard pixel value satisfies following formulas:
Nsz=Drive_gain_Ns×Nsc, and
Drive_gain_Ns=Drive_gain_Nex+(1−D)−Drive_gain_Npr,
wherein D represents the interpolation step-size of the gray scale value of the sub-pixel in the second pixel value, and D is greater than or equal to 0 and less than or equal to 1; Nsz represents the gray scale value of the sub-pixel in the second standard pixel value; Nsc represents the gray scale value of the sub-pixel in the second pixel value; Drive_gain_Ns represents a correction ratio coefficient of the gray scale value of the sub-pixel in the second standard pixel value; Drive_gain_Nex represents the correction ratio coefficient of the gray scale value of the sub-pixel in a latter first standard pixel value of the two first standard pixel values; Drive_gain_Npr represents the correction ratio coefficient of the gray scale value of the sub-pixel in a previous first standard pixel value of the two first standard pixel values.