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：US09848471B2

公开(公告)日：2017-12-19

申请号：US15203082

申请日：2016-07-06

Applicant: Samsung Display Co., Ltd.

Inventor： Jin-won Jang ,  Seung-wan Kim

IPC: H05B37/02 ,  H05B33/08 ,  G02F1/1335

CPC classification number: H05B33/0827 ,  G02F1/133603 ,  G02F2001/133613 ,  G09G3/3426 ,  G09G3/3648 ,  H05B33/083 ,  H05B33/0845

Abstract: A backlight unit includes a main light-emitting diode (“LED”) array, a sub LED array, an LED driver which individually controls an on-off operation of the main LED array and an on-off operation of the sub LED array and includes a first switch, a second switch, a third switch, a fourth switch, a sub switch control unit, and a main switch control unit, and a direct current (“DC”)/DC converter unit which receives an input voltage and provides a DC voltage to the LED driver where the sub switch control unit controls the first and third switches so that one of the first and third switches is turned on and the other is turned off, and the main switch control unit controls the second and fourth switches so that one of the second and fourth switches is turned on and the other is turned off.