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:
Jan. 03, 2023
Filed:
Sep. 03, 2019
Applicant:
Samsung Display Co., Ltd., Yongin-si, KR;
Inventors:
Daeyoun Cho, Yongin-si, KR;
Jongwoo Park, Seongnam-si, KR;
Youngtae Choi, Cheonan-si, KR;
Jiho Moon, Hwaseong-si, KR;
Ju hee Lee, Asan-si, KR;
Younjae Jung, Suwon-si, KR;
Assignee:
Samsung Display Co., Ltd., Yongin-si, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/26 (2020.01); H01L 51/00 (2006.01); H01L 27/32 (2006.01);
U.S. Cl.
CPC ...
H01L 51/0031 (2013.01); G01R 31/2601 (2013.01); G01R 31/2635 (2013.01); H01L 27/3276 (2013.01);
Abstract
A test device includes: a plurality of signal test pads electrically connected to pads of an input sensing unit; a power test pad electrically connected to a power pattern of a display unit; a test circuit configured to apply a test signal to the signal test pads; a voltage generator configured to generate a sensing power voltage; and a ripple controller configured to change a voltage level of the sensing power voltage to apply the sensing power voltage to the power test pad.