公开(公告)号：EP4412399A1

公开(公告)日：2024-08-07

申请号：EP24155298.3

申请日：2024-02-01

申请人： LX Semicon Co., Ltd.

发明人： KIM, Sang Suk ,  KIM, Jang Su ,  KIM, Ji Hwan ,  CHOI, Jin Ho

IPC分类号： H05B45/347 ,  H05B45/325 ,  H05B45/34 ,  H05B45/14 ,  H05B45/397 ,  G09G3/34

CPC分类号： H05B45/325 ,  H05B45/34 ,  H05B45/347 ,  H05B45/14 ,  H05B45/397 ,  G09G3/3406

摘要： The light-emitting driving device includes a driving current generation circuit, a sensing circuit, a PWM signal generation circuit, and a controller. The driving current generation circuit can be connected to a channel terminal of a light-emitting string including a plurality of semiconductor light-emitting elements to generate a driving current supplied to the channel terminal. The sensing circuit is connected to the channel terminal to sense a voltage of the channel terminal. The PWM signal generation circuit can generate a PWM signal that controls the supply of driving current. The controller is connected to the sensing circuit to control at least one or more of the intensity of the driving current and the duty ratio of the PWM signal based on the sensed voltage of the channel terminal.

公开(公告)号：EP4002958B1

公开(公告)日：2024-07-17

申请号：EP21205675.8

申请日：2021-10-29

IPC分类号： H05B45/347 ,  H05B45/46 ,  H05B45/14

CPC分类号： H05B45/347 ,  H05B45/46 ,  H05B45/14 ,  Y02B20/30

公开(公告)号：EP4366468A1

公开(公告)日：2024-05-08

申请号：EP23207235.5

申请日：2023-11-01

申请人： LX Semicon Co., Ltd.

发明人： SEO, Byung Jun ,  KIM, Ji Hwan ,  WOO, Young Jin ,  LEE, Jong Min ,  HONG, Ju Pyo

IPC分类号： H05B45/347 ,  H05B45/50 ,  H05B45/35 ,  H05B45/345

CPC分类号： H05B45/50 ,  H05B45/347 ,  H05B45/35 ,  H05B45/345 ,  H05B45/395

摘要： The present disclosure relates to a light emitting diode (LED) driving device that may expand a usable range of LED current and battery voltage by reducing heat generation of an integrated circuit, and an LED lighting device including the same, which may include a current controller that constantly controls an LED current flowing through an LED string and an IC heat dissipation part connected to a node between the LED string and the current controller to dissipate IC heat of the current controller, wherein when a battery voltage supplied to the LED string increases, the IC heat dissipation part reduces a first LED current flowing from the LED string to the current controller and simultaneously increases a second LED current flowing from the LED string to the current controller via the IC heat dissipation part, thereby reducing the IC heat generation of the current controller.

公开(公告)号：EP3900488B1

公开(公告)日：2024-07-03

申请号：EP19817797.4

申请日：2019-12-17

IPC分类号： H05B45/00

CPC分类号： H05B45/48 ,  H05B45/46 ,  H05B45/347 ,  Y02B20/30

公开(公告)号：EP4190128B1

公开(公告)日：2024-05-08

申请号：EP21746034.4

申请日：2021-07-16

IPC分类号： H05B45/395 ,  H05B45/347 ,  H02M1/42

CPC分类号： H05B45/347 ,  H05B45/395 ,  Y02B20/30