公开(公告)号：US10515594B2

公开(公告)日：2019-12-24

申请号：US15493565

申请日：2017-04-21

Applicant: Samsung Display Co., Ltd.

Inventor： Jin-won Jang ,  Won-hyoung Kang ,  Seung-wan Kim ,  Gwangteak Lee ,  Songyi Han ,  Jin-taek Hong ,  Seunghwan Moon

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

Abstract: A backlight unit includes a light source module including a first connection pin and a second connection pin electrically connected to the first connection pin, a power converter which provides a driving voltage to the light source module, a connector which receives a first enable signal via a first signal line and provides a second enable signal via a second signal line and a driving circuit which controls a generation of the driving voltage from the power converter in response to the second enable signal. When the connector is electrically connected to the first and second connection pins, the first enable signal is transmitted to the first connection pin via the first signal line and the connector, and the second enable signal from the second connection pin is provided to the driving circuit via the connector and the second signal line.

公开(公告)号：US10009967B2

公开(公告)日：2018-06-26

申请号：US15048448

申请日：2016-02-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Dae-sik Lee ,  Seokhwan Lee ,  Won-hyoung Kang

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0827

Abstract: A backlight unit includes a light source part, a DC/DC converter, and a light source driving circuit. The DC/DC converter receives an input voltage and provides a driving voltage to the light source part. The light source driving circuit receives an analog voltage, generates a clamping voltage on the basis of the analog voltage, and generates a main driving signal applied to the DC/DC converter on the basis of the analog voltage and the clamping voltage. The light source driving circuit decreases a duty ratio of the main driving signal when the analog voltage is equal to or lower than a reference voltage.

公开(公告)号：US20160323946A1

公开(公告)日：2016-11-03

申请号：US15048448

申请日：2016-02-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Dae-sik Lee ,  Seokhwan Lee ,  Won-hyoung Kang

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0827

Abstract: A backlight unit includes a light source part, a DC/DC converter, and a light source driving circuit. The DC/DC converter receives an input voltage and provides a driving voltage to the light source part. The light source driving circuit receives an analog voltage, generates a clamping voltage on the basis of the analog voltage, and generates a main driving signal applied to the DC/DC converter on the basis of the analog voltage and the clamping voltage. The light source driving circuit decreases a duty ratio of the main driving signal when the analog voltage is equal to or lower than a reference voltage.

Abstract translation: 背光单元包括光源部分，DC / DC转换器和光源驱动电路。 DC / DC转换器接收输入电压并向光源部分提供驱动电压。 光源驱动电路基于模拟电压接收模拟电压，产生钳位电压，并根据模拟电压和钳位电压产生施加到DC / DC转换器的主驱动信号。 当模拟电压等于或低于参考电压时，光源驱动电路降低主驱动信号的占空比。