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:
Feb. 14, 2017
Filed:
May. 13, 2014
Yuichi Maekawa, Kanagawa, JP;
Koichi Miwa, Kanagawa, JP;
Yuichi Maekawa, Kanagawa, JP;
Koichi Miwa, Kanagawa, JP;
Global OLED Technology LLC, Herndon, VA (US);
Abstract
Checking failures in transistors including driving transistors, switching transistors, and sampling transistors before light emitting elements are formed in a display device. I-V characteristics including threshold voltage of the driving transistorC in one pixel circuit can be detected. In a pixel circuit, the sampling transistorA and switching transistorD are made conductive and the signal potential is given to the gate electrode of the driving transistorC from the signal line DTCm. At this time, the current which flows between the drain electrode and source electrode of driving transistorC flows through the switching transistorD and a reference potential line Vref_r to a test point, and is measured by a current measuring device connected to the test point.