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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10726776 B1

PDFFull Text
Date of Patent:
Jul. 28, 2020

Filed:

Apr. 19, 2019

Pixel-by-pixel calibration method

Applicant:

Xi'an Novastar Tech Co., Ltd., Xi'an, CN;

Inventors:

Jingguo Zong, Xi'an, CN;

Xingmei Zhao, Xi'an, CN;

Cheng Yang, Xi'an, CN;

Assignee:

XI'AN NOVASTAR TECH CO., LTD., Xi'an, CN;

Attorneys:

Hemisphere Law, PLLC

Zhigang Ma

Primary Examiner:

Michael J Eurice

Int. Cl.
CPC ...
G06F 3/14 (2006.01); G06F 3/147 (2006.01); G09G 3/32 (2016.01); H01L 27/32 (2006.01); G09F 13/04 (2006.01); H04N 1/60 (2006.01); G02F 1/1333 (2006.01);
U.S. Cl.
CPC ...
G09G 3/32 (2013.01); G09F 13/0413 (2013.01); H01L 27/3211 (2013.01); G02F 1/13336 (2013.01); G09G 2320/0693 (2013.01); H04N 1/6052 (2013.01);
Abstract

A pixel-by-pixel calibration method is provided. Multiple sample cabinets are selected from to-be-calibrated cabinets to form a small screen with the sample cabinets, image acquisitions are performed on the small screen and luminance-chrominance mean deviation ratios are calculated. The sample cabinets are placed at fulcrum positions of a large screen to be calibrated, and the other remaining cabinets are placed at other positions. Full-screen original luminance-chrominance values are obtained by image acquisition on the large screen, original luminance-chrominance values of the sample cabinets are adjusted by the luminance-chrominance mean deviation ratios, and luminance-chrominance distribution fitting surfaces are generated by adjusted full-screen original luminance-chrominance values to amend the full-screen original luminance-chrominance values. Amended full-screen luminance-chrominance values are used as luminance-chrominance initial values and luminance-chrominance target values are set, and full-screen pixel-by-pixel calibration coefficients of the large screen are obtained. The effect of arbitrarily splicing LED cabinets after calibration can be achieved.

Find Patent Forward Citations

Zong, Jingguo. (2020). Pixel-by-pixel calibration method (U.S. Patent No. 10726776). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10726776

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