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:
Dec. 26, 2017
Filed:
Mar. 04, 2016
Applicant:
Samsung Display Co., Ltd., Yongin-si, Gyeonggi-Do, KR;
Inventors:
Assignee:
SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/36 (2006.01); G09G 3/34 (2006.01); H05B 33/08 (2006.01); G09G 3/00 (2006.01);
U.S. Cl.
CPC ...
G09G 3/342 (2013.01); G09G 3/3648 (2013.01); H05B 33/0827 (2013.01); H05B 33/0851 (2013.01); G09G 3/003 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/064 (2013.01); G09G 2330/021 (2013.01); G09G 2330/12 (2013.01);
Abstract
A backlight unit includes a power converter which generates a light source power voltage at a first node in response to a voltage control signal, at least one light emitting diode string which is connected between the first node and a second node and receives the light source power voltage through the first node, and a controller connected to the second node where the controller detects current of a detection node varying based on a duty ratio of the power control signal, and controls current flowing through the second node when the detected current is greater than a reference value.