公开(公告)号：US20140111497A1

公开(公告)日：2014-04-24

申请号：US13767170

申请日：2013-02-14

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： SeungYoung CHOI ,  Min-Soo CHOI ,  HWANWOONG LEE ,  GWANGTEAK LEE

IPC: G09G5/10

CPC classification number: G09G5/10 ,  G09G5/34

Abstract: A backlight unit includes a power supply converter including a primary winding connected to an input power supply voltage, and a secondary winding which is connected to an output node and outputs a light emitting diode drive voltage to the output node in response to a mode signal and a switching control signal; and a light emitting diode string connected to the output node of the power supply converter, where the power supply converter serially connects a boosting winding to the secondary winding and the output node and when the mode signal represents a three dimensional image display mode, and outputs a boosted light emitting diode drive voltage to the output node through the boosting winding.

Abstract translation: 背光单元包括电源转换器，其包括连接到输入电源电压的初级绕组和连接到输出节点的次级绕组，并且响应于模式信号将输出节点的发光二极管驱动电压输出， 切换控制信号; 以及连接到电源转换器的输出节点的发光二极管串，其中电源转换器将升压绕组串联连接到次级绕组和输出节点，并且当模式信号表示三维图像显示模式时，并且输出 升压的发光二极管通过升压绕组驱动电压到输出节点。

公开(公告)号：US20140192102A1

公开(公告)日：2014-07-10

申请号：US13928582

申请日：2013-06-27

Applicant: Samsung Display Co., Ltd.

Inventor： Taegon IM ,  Myoung-Soo KIM ,  HWANWOONG LEE ,  Min-Soo CHOI ,  EUN CHUL SHIN ,  Dae-Sik LEE

IPC: H05B33/08 ,  G09G5/10

CPC classification number: G09G5/10 ,  G09G3/3406 ,  H05B33/0827

Abstract: A backlight unit includes a power converter configured to generate a light source driving voltage in response to a voltage control signal, a plurality of light emitting diode strings, where each of the light emitting diode strings receives the light source driving voltage through a first terminal thereof, a plurality of transistors corresponding to the light emitting diode strings, where each of the transistors includes: a first electrode connected to a second terminal of a corresponding light emitting diode string thereof; a second electrode; and a control electrode, and a controller connected to the control electrode and the second electrode, where the controller outputs a plurality of current control signals to control electrodes of the transistors and generate the voltage control signal, where the controller generates an over-current detection signal when any one of the current control signals has a pulse width greater than a predetermined reference width.

Abstract translation: 背光单元包括功率转换器，其被配置为响应于电压控制信号产生光源驱动电压，多个发光二极管串，其中每个发光二极管串通过其第一端子接收光源驱动电压 ，对应于发光二极管串的多个晶体管，其中每个晶体管包括：连接到其相应的发光二极管串的第二端子的第一电极; 第二电极; 以及控制电极，连接到控制电极和第二电极的控制器，其中控制器将多个电流控制信号输出到晶体管的控制电极并产生电压控制信号，其中控制器产生过电流检测 当任何一个电流控制信号具有大于预定参考宽度的脉冲宽度时的信号。