公开(公告)号：US12075534B2

公开(公告)日：2024-08-27

申请号：US18083125

申请日：2022-12-16

申请人： LX SEMICON CO., LTD.

发明人： Yun Sung Wang ,  Sang Suk Kim ,  Jang Su Kim

IPC分类号： H05B45/325 ,  H05B45/10

CPC分类号： H05B45/325 ,  H05B45/10

摘要： A hybrid dimming control device, which prevents image quality degradation during local dimming of a backlight unit, includes an analysis circuit configured to determine a type of dimming data for controlling the local dimming of a light source included in a backlight unit by analyzing the dimming data, a pulse width modulation (PWM) dimming control circuit configured to control the local dimming of the light source by a PWM method when the type of the dimming data is a first type, and an active dimming control circuit configured to convert some bits of the dimming data into an analog signal and control the local dimming of the light source using the analog signal when the type of the dimming data is a second type.

公开(公告)号：US12051382B2

公开(公告)日：2024-07-30

申请号：US18083032

申请日：2022-12-16

申请人： LX SEMICON CO., LTD.

发明人： Yun Sung Wang ,  Soon Hyeok Kwak ,  Jang Su Kim ,  Sang Suk Kim

IPC分类号： G09G3/34

CPC分类号： G09G3/3426 ,  G09G2320/064

摘要： A system for controlling backlight unit capable of reducing a time difference between an image displayed on a display panel and local dimming of the backlight unit, includes a plurality of dimming control devices configured to receive an input data packet including dimming data, and control local dimming of a light source, which is included in a region assigned in advance in a backlight unit, using the dimming data, a plurality of gate lines configured to electrically connect a predetermined number of dimming control devices and configured to be sequentially driven according to a row driving method, and a micro controller unit configured to generate a gate control signal for driving the plurality of gate lines and the input data packet.