公开(公告)号：US20190090321A1

公开(公告)日：2019-03-21

申请号：US16130186

申请日：2018-09-13

Applicant: Samsung Display Co., Ltd.

Inventor： Dae-sik LEE ,  Yanguk NAM ,  Songyi HAN

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

Abstract: A backlight unit includes a power converter which generates a light source power voltage to a power node, a first light emitting diode string connected between the power node and a first node to receive the light source power voltage through the power node, a second light emitting diode string connected between the power node and a second node to receive the light source power voltage through the power node, and a current controller which controls a current flowing through the first node of the first light emitting diode string and a current flowing through the second node of the second light emitting diode string in response to a dimming voltage signal. The current controller includes a switching unit which electrically connects the first node of the first light emitting diode string to the second node of the second light emitting diode string in response to a mode enable signal.

公开(公告)号：US20180090079A1

公开(公告)日：2018-03-29

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: G09G3/34 ,  H05B33/08 ,  G09G3/36

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.