公开(公告)号：US20160143103A1

公开(公告)日：2016-05-19

申请号：US14841464

申请日：2015-08-31

Applicant: Samsung Display Co., Ltd.

Inventor： Wonhyoung KANG ,  Mingyu KIM ,  Taegon IM ,  Songyi HAN ,  Jintaek HONG

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  G09G3/3406 ,  G09G3/3426 ,  H05B33/0845 ,  H05B33/0851 ,  H05B33/089 ,  H05B37/0245 ,  H05B37/0263 ,  H05B37/029 ,  H05B37/032

Abstract: A backlight unit includes: a light source configured to emit light based on a driving current; and a backlight controller receiving a digital dimming signal that defines a length of an output period of the driving current from a pulse width modulator and configured to, when a duty ratio of the driving current is less than a reference duty ratio, modulates the duty ratio of the driving current so that the duty ratio of the driving current is equal to or greater than the reference duty ratio and decrease a duty ratio of the digital dimming signal.

Abstract translation: 背光单元包括：被配置为基于驱动电流发光的光源; 以及背光控制器，其接收数字调光信号，所述数字调光信号限定来自脉宽调制器的驱动电流的输出周期的长度，并且被配置为当所述驱动电流的占空比小于参考占空比时，调制所述占空比 使得驱动电流的占空比等于或大于参考占空比，并降低数字调光信号的占空比。

公开(公告)号：US20160366737A1

公开(公告)日：2016-12-15

申请号：US15176632

申请日：2016-06-08

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jintaek HONG ,  Jinwon JANG ,  Daesik LEE

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0845

Abstract: A backlight unit which significantly reduces overshoot of a light source driving current and audible noise includes a light source driven by a light source driving voltage, a light source controller controlling the light source driving voltage, and a soft starter generating a first soft start voltage by receiving a charge signal from the light source controller and outputting the first soft start voltage to the light source controller, and generating a second soft start voltage when the charge signal is not applied thereto and outputting the second soft start voltage to the light source controller.

Abstract translation: 显着减少光源驱动电流和可听见噪声的过冲的背光单元包括由光源驱动电压驱动的光源，控制光源驱动电压的光源控制器和通过以下方式产生第一软启动电压的软启动器 从光源控制器接收充电信号，并将第一软启动电压输出到光源控制器，当不向其施加充电信号并产生第二软启动电压并将第二软启动电压输出到光源控制器时产生第二软启动电压。

公开(公告)号：US20160183342A1

公开(公告)日：2016-06-23

申请号：US14825837

申请日：2015-08-13

Applicant: Samsung Display Co., Ltd.

Inventor： Jinwon JANG ,  Jintaek HONG

IPC: H05B33/08

CPC classification number: H05B33/0851 ,  H05B33/086 ,  Y02B20/347

Abstract: A backlight unit capable of substantially reducing a change in a level of a driving current includes: a light source; a static current switching element connected between the light source and a sensing node and controlling a driving current supplied to the light source; a sensing resistor connected between the sensing node and a ground; a static current controller controlling an operation of the static current switching element based on a sensing voltage from the sensing node and an externally supplied driving current control signal; and a driving current corrector generating the driving current control signal and correcting a level of the driving current control signal based on the sensing voltage.

Abstract translation: 能够实质上减小驱动电流的电平变化的背光单元包括：光源; 连接在所述光源和感测节点之间的静态电流开关元件，并控制提供给所述光源的驱动电流; 感测电阻连接在感测节点和地之间; 静态电流控制器，其基于来自感测节点的感测电压和外部提供的驱动电流控制信号来控制静态电流开关元件的操作; 以及驱动电流校正器，其产生驱动电流控制信号，并且基于感测电压来校正驱动电流控制信号的电平。