公开(公告)号：US20160140912A1

公开(公告)日：2016-05-19

申请号：US14850773

申请日：2015-09-10

Applicant: Samsung Display Co., Ltd.

Inventor： Taegon IM ,  Min-Soo CHOI ,  Min-Gyu KIM ,  Youngsup KWON ,  Eun Chul SHIN ,  Dae-Sik LEE

IPC: G09G3/34 ,  G09G3/00

CPC classification number: G09G3/3406 ,  G09G3/003 ,  G09G3/3426 ,  G09G2310/0237 ,  G09G2310/0264 ,  G09G2310/08 ,  G09G2320/062 ,  G09G2320/064 ,  G09G2320/08 ,  G09G2360/16

Abstract: A backlight unit includes a light source part including a light-emitting diode array, a DC/DC converter, a driving current controller, and a reference voltage variable part. The backlight unit is operated in a first mode or a second mode. The driving current controller controls a driving current flowing through the light-emitting diode array to have a first current level during the first mode and controls the driving current flowing through the light-emitting diode array to have a second current level during the second mode. The reference voltage variable part applies a first reference voltage to the driving current controller during the first mode and applies a second reference voltage to the driving current controller during the second mode.

Abstract translation: 背光单元包括包括发光二极管阵列，DC / DC转换器，驱动电流控制器和参考电压可变部分的光源部分。 背光单元在第一模式或第二模式下操作。 驱动电流控制器控制流过发光二极管阵列的驱动电流，以在第一模式期间具有第一电流电平，并且在第二模式期间控制流过发光二极管阵列的驱动电流具有第二电流电平。 参考电压可变部分在第一模式期间将第一参考电压施加到驱动电流控制器，并且在第二模式期间将第二参考电压施加到驱动电流控制器。

公开(公告)号：US20150221249A1

公开(公告)日：2015-08-06

申请号：US14469619

申请日：2014-08-27

Applicant: Samsung Display Co., Ltd.

Inventor： Kyunho KIM ,  Youngsup KWON ,  Min-Gyu KIM ,  Eun Chul SHIN ,  Hwanwoong LEE ,  Min-Soo CHOI

IPC: G09G3/20 ,  G09G3/34

CPC classification number: G09G3/2092 ,  G09G3/3413 ,  G09G3/3648 ,  G09G2330/025 ,  G09G2330/04

Abstract: A backlight unit including, a controller configured to generate a control signal, a power converter configured generate a light-source voltage in response to the control signal, and at least one light emitting diode string connected between a first node and a second node and supplied with the light-source voltage from the first node, wherein the controller includes a current controller configured to adjust a current flow through the light emitting diode string, and an overvoltage controller connected between the light emitting diode string and the current controller, including a passive element, wherein the overvoltage controller is configured to connect the passive element between the second node and the current controller when a voltage of the second node of the light emitting diode is higher than a reference voltage.

Abstract translation: 一种背光单元，包括：被配置为产生控制信号的控制器，被配置为响应于控制信号产生光源电压的功率转换器，以及连接在第一节点和第二节点之间的至少一个发光二极管串， 具有来自第一节点的光源电压，其中控制器包括配置成调节通过发光二极管串的电流的电流控制器，以及连接在发光二极管串和电流控制器之间的过电压控制器，包括被动 元件，其中所述过电压控制器被配置为当所述发光二极管的第二节点的电压高于参考电压时，在所述第二节点和所述电流控制器之间连接所述无源元件。