公开(公告)号：US09548021B2

公开(公告)日：2017-01-17

申请号：US13742519

申请日：2013-01-16

Applicant: Samsung Display Co., LTD.

Inventor： Seung-Wan Kim ,  Min-Soo Choi ,  Gwang-Teak Lee ,  Tae-Gon Im ,  Myoung-Soo Kim ,  Hwan-Woong Lee ,  Seung-Young Choi

IPC: G09G3/36 ,  G09G3/32 ,  G09G3/34 ,  H05B33/08

CPC classification number: G09G3/3426 ,  G09G3/3233 ,  G09G5/10 ,  G09G2300/023 ,  G09G2310/0289 ,  G09G2310/06 ,  G09G2320/064 ,  G09G2360/16 ,  H05B33/0803 ,  H05B33/0815 ,  H05B33/0845

Abstract: A method of driving a light-source module includes adjusting a frequency of a boosting switching signal based on a dimming signal which controls luminance of a light-emitting diode (“LED”) string of the light-source module, where the LED string comprises a plurality of LEDs connected to each other in series, and controlling a main transistor in response to the boosting switching signal to transfer a driving voltage to the LED string.

Abstract translation: 驱动光源模块的方法包括基于控制光源模块的发光二极管（“LED”）串的亮度的调光信号来调节升压切换信号的频率，其中LED串包括 串联连接的多个LED，并且响应于升压开关信号控制主晶体管，以将驱动电压传送到LED串。

公开(公告)号：US10854149B2

公开(公告)日：2020-12-01

申请号：US15374016

申请日：2016-12-09

Applicant: Samsung Display Co., Ltd.

Inventor： Seung-Wan Kim ,  Min-Soo Choi ,  Gwang-Teak Lee ,  Tae-Gon Im ,  Myoung-Soo Kim ,  Hwan-Woong Lee ,  Seung-Young Choi

IPC: G09G3/34 ,  G09G3/3233 ,  H05B45/00 ,  H05B45/10 ,  H05B45/37 ,  G09G5/10

Abstract: A method of driving a light-source module includes adjusting a frequency of a boosting switching signal based on a dimming signal which controls luminance of a light-emitting diode (“LED”) string of the light-source module, where the LED string comprises a plurality of LEDs connected to each other in series, and controlling a main transistor in response to the boosting switching signal to transfer a driving voltage to the LED string.

公开(公告)号：US09947285B2

公开(公告)日：2018-04-17

申请号：US14616887

申请日：2015-02-09

Applicant: Samsung Display Co., Ltd.

Inventor： Gwang-Teak Lee ,  Seung-Young Choi ,  Jae-Kyu Park

IPC: H05B37/02 ,  G09G3/36 ,  H02M3/158 ,  H02M1/00 ,  G09G3/34

CPC classification number: G09G3/3696 ,  G09G3/3406 ,  G09G3/3648 ,  G09G2310/08 ,  G09G2330/024 ,  G09G2330/028 ,  H02M3/158 ,  H02M3/1588 ,  H02M2001/0048 ,  Y02B70/1466 ,  Y02B70/1491

Abstract: A voltage converter includes a conversion unit, a self driver and an output unit. The conversion unit includes at least one inductor and provides a boosting power based on an input voltage and a first driving signal. The self driver includes at least one inductor that forms a magnetic coupling with the at least one inductor of the conversion unit. The self driver generates a second driving signal that is synchronized with the first driving signal through the magnetic coupling. The output unit generates an output voltage based on the boosting power and the second driving signal. Switching loss and conduction loss may be reduced by replacing an output diode with an output transistor and voltage spike and electromagnetic interference may be reduced through zero voltage switching. The driving signal of the output transistor may be controlled efficiently by adjusting the inductance of the driving inductor.