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公开(公告)号:US20210068219A1
公开(公告)日:2021-03-04
申请号:US16899061
申请日:2020-06-11
Applicant: Samsung Display Co., LTD.
Inventor: Dae-Sik LEE , Jiyoun SEO
IPC: H05B45/14 , G02F1/13357 , H05B45/48 , H05B45/325 , H05K1/18
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.