US 11,081,029 B2 · Method for evaluating brightness measurement accuracy of Demura equipment

Abstract

The invention discloses a method for evaluating a brightness measurement accuracy of a Demura equipment by generating a noise-added image by adding a random number to an original grayscale image and obtaining a measurement value corresponding to the added random number via the noise-added image displayed by the Demura equipment. The brightness measurement accuracy of the Demura equipment is evaluated based on a correlation between the measured value and the originally added random number to measure a brightness extraction performance of the Demura equipment. The method provided by the invention provides a quantitative and measurable determining method that may better reflect the actual performance of the Demura equipment.

Claims18

Dependent claims

A method for evaluating a brightness measurement accuracy of a Demura equipment, comprising:

generating a noise-added image by adding random numbers to a grayscale image;
and
obtaining a measured brightness value of each sub-pixel corresponding to the added random numbers based on the noise-added image displayed by the Demura equipment;
and
evaluating the brightness measurement accuracy of the Demura equipment based on a correlation between the measured brightness value of each of the sub-pixel and the originally-added random numbers.

2 more elements

A method for evaluating a brightness measurement accuracy of a Demura equipment, comprising the steps of:

(1) driving a display panel to display a plurality of images of different grayscales;
(2) extracting brightness of each sub-pixel of each of the images by using the Demura equipment to be evaluated;
(3) calculating a Gamma mapping relationship based on the brightness of the each sub-pixel and a corresponding grayscale each of the sub-pixels;
(4) obtaining a noise-added image by adding one random number to an original input grayscale of a pixel of the images and adding different random numbers to different pixels;
(5) driving the display panel to display the noise-added image and measuring brightness of each of the sub-pixels of the displayed noise-added image;
(6) substituting the brightness of each of the sub-pixels in step (5) into the Gamma mapping relationship obtained based on step (3) and inversely calculating a grayscale measurement value and a random number measurement value corresponding to the brightness;
(7) obtaining a correlation between the random number measurement value and the added random number and evaluating the brightness measurement accuracy of the Demura equipment by using the correlation.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/606,773Filed 9 Jul 2018

Priority

CN 201810608731.213 Jun 2018

Published

US 2020/0380897 A13 Dec 2020

Granted

3 Aug 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G09G 3/006
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes: electronic inspection or…
G06F 7/588
Random or pseudo-random number generators: random number generators, i.e. based on natural stochastic processes
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 2300/0452
Pixel structures: details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components

Method for evaluating brightness measurement accuracy of Demura equipment

Life of this patent

Method for evaluating brightness measurement accuracy of Demura equipment

Life of this patent

Abstract

Claims18