Patent ID: 9064462
Filing Date: 2015-06-23
Classification: G09G

Abstract:
1. A method for compensating images at a pixel level, applied to an electronic paper display displaying N-level grayscale images, wherein pixels of the electronic paper display are arranged as a pixel array, and the N-level grayscale comprises grayscale values from a first-level grayscale value to an N-th-level grayscale value, the method comprising: providing a first standard image where each pixel has the first-level grayscale value; displaying a first image by the electronic paper display corresponding to the first standard image; using a microscope to capture a plurality of partial images of the electronic paper display when the electronic paper display displays the first image; dividing the plurality of partial images into a plurality of pixel images; determining a first luminance value of each pixel of the electronic paper display when the electronic paper display displays the first image according to the plurality of pixel images; normalizing the first luminance value of each pixel; determining the first actual grayscale value of each pixel according to the normalized first luminance value; obtaining a first actual grayscale value of each pixel of the electronic paper display when the electronic paper display displays the first image; comparing the first-level grayscale value with the first actual grayscale value of each pixel to generate a first compensating matrix, wherein compensating elements in the first compensating matrix are arranged corresponding to the pixel array; providing standard images from a second standard image to an N-th standard image which respectively correspond to grayscale values from a second-level grayscale value to the N-th-level grayscale value, and repeating the steps above to respectively generate compensating matrices from a second compensating matrix to an N-th compensating matrix; compensating an input image of the electronic paper display according to the first compensating matrix to the N-th compensating matrix; and displaying an output image according to the compensated input image, wherein N is a positive integer.