公开(公告)号：US20220114975A1

公开(公告)日：2022-04-14

申请号：US17373092

申请日：2021-07-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kangjoo KIM ,  Sugyeung Kang ,  Yongsik Kwak ,  Yongil Kwon ,  Sunkwon Kim ,  Uijong Song ,  Sewoong Ahn

IPC: G09G3/34

Abstract: A backlight system includes a backlight and a master driving circuit. The backlight includes a plurality of slave driving circuits and a plurality of light sources driven by the plurality of slave driving circuits, wherein the plurality of slave driving circuits are arranged in a matrix of driving rows and driving columns such that first through m-th slave driving circuits, where m is a positive integer greater than one, are arranged in each driving row of the driving rows, and the first through m-th slave driving circuits are connected in a daisy chain structure. The master driving circuit is configured to generate a plurality of input data signals, wherein each input data signal of the plurality of input data signals corresponds to the each driving row, and the each input data signal includes first through m-th packets including luminance data corresponding to the first through m-th slave driving circuits

公开(公告)号：US11488548B2

公开(公告)日：2022-11-01

申请号：US17373092

申请日：2021-07-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kangjoo Kim ,  Sugyeung Kang ,  Yongsik Kwak ,  Yongil Kwon ,  Sunkwon Kim ,  Uijong Song ,  Sewoong Ahn

IPC: G09G3/34

Abstract: A backlight system includes a backlight and a master driving circuit. The backlight includes a plurality of slave driving circuits and a plurality of light sources driven by the plurality of slave driving circuits, wherein the plurality of slave driving circuits are arranged in a matrix of driving rows and driving columns such that first through m-th slave driving circuits, where m is a positive integer greater than one, are arranged in each driving row of the driving rows, and the first through m-th slave driving circuits are connected in a daisy chain structure. The master driving circuit is configured to generate a plurality of input data signals, wherein each input data signal of the plurality of input data signals corresponds to the each driving row, and the each input data signal includes first through m-th packets including luminance data corresponding to the first through m-th slave driving circuits.

公开(公告)号：US12008969B2

公开(公告)日：2024-06-11

申请号：US17958835

申请日：2022-10-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kangjoo Kim ,  Sugyeung Kang ,  Yongsik Kwak ,  Yongil Kwon ,  Sunkwon Kim ,  Uijong Song ,  Sewoong Ahn

IPC: G09G3/34

CPC classification number: G09G3/3426 ,  G09G2310/0286 ,  G09G2310/0294 ,  G09G2320/0233

Abstract: A backlight system includes a backlight and a master driving circuit. The backlight includes a plurality of slave driving circuits and a plurality of light sources driven by the plurality of slave driving circuits, wherein the plurality of slave driving circuits are arranged in a matrix of driving rows and driving columns such that first through m-th slave driving circuits, where m is a positive integer greater than one, are arranged in each driving row of the driving rows, and the first through m-th slave driving circuits are connected in a daisy chain structure. The master driving circuit is configured to generate a plurality of input data signals, wherein each input data signal of the plurality of input data signals corresponds to the each driving row, and the each input data signal includes first through m-th packets including luminance data corresponding to the first through m-th slave driving circuits.

公开(公告)号：US11900865B2

公开(公告)日：2024-02-13

申请号：US18056406

申请日：2022-11-17

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yongsik Kwak ,  Sunkwon Kim ,  Yongil Kwon ,  Uijong Song ,  Moonsuk Jeong ,  Youngkil Choi

IPC: G09G3/32 ,  G09G3/20

CPC classification number: G09G3/32 ,  G09G3/2007 ,  G09G2300/0828 ,  G09G2300/0852 ,  G09G2310/0291 ,  G09G2330/021

Abstract: A light-emitting diode (LED) driving circuit for driving an LED channel including a plurality of LED elements includes a switch-capacitor amplifier circuit configured to sample received input current and amplify an input voltage corresponding to the input current, a replica circuit configured to connect to the switch-capacitor amplifier circuit in a first period to define a first feedback loop, and an output circuit configured to connect to the switch-capacitor amplifier in a second period to define a second feedback loop. The second period is after the first period, and the output circuit is configured to generate output current according to an output voltage of the switch-capacitor amplifier circuit and provide the output current to the LED.