公开(公告)号：US20170018230A1

公开(公告)日：2017-01-19

申请号：US15061139

申请日：2016-03-04

Applicant: Samsung Display Co., LTD.

Inventor： Taegon IM ,  Min-gyu KIM ,  Youngsup KWON

IPC: G09G3/34 ,  G09G3/36 ,  H05B33/08

CPC classification number: G09G3/342 ,  G09G3/003 ,  G09G3/3648 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/064 ,  G09G2330/021 ,  G09G2330/12 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/0851

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.

Abstract translation: 背光单元包括：功率转换器，其响应于电压控制信号在第一节点处产生光源电源电压;至少一个发光二极管串，连接在第一节点和第二节点之间，并接收光源功率 通过第一节点的电压以及连接到第二节点的控制器，其中控制器检测基于功率控制信号的占空比而变化的检测节点的电流，并且当检测到的电流大于时，控制流过第二节点的电流 参考值。