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.:
Date of Patent:
Nov. 27, 2018
Filed:
Jul. 16, 2015
Sharp Kabushiki Kaisha, Sakai, JP;
Shigetsugu Yamanaka, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, Osaka, JP;
Abstract
An initial current ratio calculation unit obtains an initial current ratio for each pixel based on a current measurement result by a data line drive/current measurement circuit. A light emission current efficiency calculation unit obtains a light emission current efficiency for each pixel referring to an LUT, based on a measured operating temperature and the initial current ratio. A first correction unit corrects a video signal for each pixel in view of characteristics of each pixel, based on the current measurement result and the light emission current efficiency. A second correction unit obtains a correction term for each pixel in view of a difference in the light emission current efficiency compared to neighboring pixels, based on a two-dimensional distribution of the light emission current efficiency. The correction term obtained by the second correction unit is added to the video signal corrected to obtain a corrected video signal.