公开(公告)号：US11304275B2

公开(公告)日：2022-04-12

申请号：US16899061

申请日：2020-06-11

Applicant: Samsung Display Co., LTD.

Inventor： Dae-Sik Lee ,  Jiyoun Seo

IPC: H05B45/14 ,  H05B45/325 ,  H05B45/48 ,  G02F1/13357 ,  H05K1/18 ,  G02F1/1335

Abstract: A light emitting device includes a light source panel including light emitting units, and a printed circuit board including a light source driving circuit electrically connected to the light source panel. The light source driving circuit receives a feedback voltage from each of the light emitting units, and compares the feedback voltage with a reference voltage to output a current control signal. Each of the light emitting units includes a light emitting diode connected to a first voltage line, a switching element connected with the light emitting diode and operating in response to the current control signal, and a resistor electrically connected between a feedback node and a second voltage line. The resistor includes a conductive pattern having a predetermined width disposed on the light source panel.