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:
May. 30, 2017
Filed:
Jun. 24, 2015
Samsung Display Co., Ltd., Yongin, Gyeonggi-Do, KR;
Seungyoung Choi, Yongin-si, KR;
Dae-sik Lee, Asan-si, KR;
Samsung Display Co., Ltd., , KR;
Abstract
According to an exemplary embodiment, a backlight unit includes a plurality of light emitting strings, and a driving controller configured to detect source voltages of a plurality of light transistors provided in the light emitting strings. The driving controller is further configured to compare a source voltage of each of the light transistors with an overcurrent protection voltage and to turn off an operation of a corresponding light transistor having a source voltage level higher than the overcurrent protection voltage. The backlight unit further includes a first comparator configured to compare the source voltage of the corresponding light transistor with a reference source voltage to output a feedback voltage according to the compared result; and a first switch configured to electrically connect the first comparator to a gate terminal of the corresponding light transistor, wherein the first switch operates in response to an overcurrent protection signal.