Display calibration system and storage medium

Patent metadata

Field	Value
Publication number	US-9513169-B2
Application number	US-201414564329-A
Country	US
Kind code	B2
Filing date	Dec 9, 2014
Priority date	Jan 30, 2014
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A display calibration system includes: a display section subject to calibration; a correction data outputting section configured to perform a calibration process to determine, for each of the pixels of the display section, correction data for non-uniformity correction; and a first storage section configured to store reference data to be used in the calibration process. The reference data represents, for individual color patches of a first predetermined number, correspondences between RGB values and reference values. The correction data outputting section obtains, on a basis of the reference data and the measurement values of the color patches of a second predetermined number that is less than the first predetermined number, the pieces of correction data with respect to RGB values of the individual color patches of the predetermined second number. With this arrangement, it is possible to shorten a processing time of the calibration process.

First claim

The invention claimed is:

1. A display calibration system realized by a computer for generating, for individual pixels of a display circuitry, their respective pieces of correction data for correction of non-uniformity of the display circuitry, the pieces of correction data each representing one of adjustment values and corrected color component values with respect to color component data,
the display calibration system comprising:
a representative value information generating section configured to (i) divide the pixels of the display circuitry into blocks each including a plurality of pixels, (ii) determine, for all of the blocks, their respective representative values of the pieces of correction data of the individual pixels provided in each of the blocks, and then (iii) generate representative value information representing the representative values corresponding to one of the blocks and the pixels of the display circuitry;
a difference data outputting section configured to generate, for all of the pixels belonging to their corresponding blocks, their respective pieces of difference data representing differences between the pieces of correction data and the representative values;
a group generating section configured to divide the pieces of difference data generated for the individual pixels of the display circuitry into groups by performing a clustering process;
a representative difference data extracting section configured to extract, for all of the groups, their respective pieces of representative difference data, on a basis of all of the pieces of difference data belonging to their corresponding groups;
a correspondence information generating section configured to generate correspondence information representing correspondences between the individual pixels of the display circuitry and the respective pieces of representative difference data of all of the groups of the pieces of difference data generated for the individual pixels of the display circuitry;
a storage device configured to store therein the representative value information and the correspondence information; and
a non-uniformity correcting circuitry configured to carry out (i) first correction of, with respect to a pixel subject to correction, reading one of the representative values from the representative value information which one corresponds to tone of the pixel subject to correction and (ii) second correction of reading one of the representative difference data from the correspondence information which one corresponds to the tone of the pixel subject to correction and transforming the read representative value into the correction data by using the read representative difference data.

2. A non-transitory computer-readable storage medium storing therein a program for causing a computer to function as the display calibration system recited in claim 1 , the program causing the computer to serve as the representative value information generating section, the difference data outputting section, the group generating section, the representative difference data extracting section, the correspondence information generating section, and the non-uniformity correcting circuitry.

Assignees

• Sharp Kk

Inventors

• Ohnishi Hideki
• Katougi Terumitsu
• Hayasaki Makoto
• Furuichi Gaku
• Adachi Yasushi

Classifications

• G09G2320/0673

  for control of gamma adjustment, e.g. selecting another gamma curve · CPC title

• G09G2320/0693

  Calibration of display systems · CPC title

• G09G2300/04

  Structural and physical details of display devices · CPC title

• G01J3/46 Primary

  Measurement of colour; Colour measuring devices, e.g. colorimeters (measuring colour temperature G01J5/60) · CPC title

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title