公开(公告)号：US12266291B2

公开(公告)日：2025-04-01

申请号：US18083055

申请日：2022-12-16

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chanbong Yu ,  Yeongshin Jang ,  Woonyoung Lee

IPC: G09G3/20

Abstract: A display driver is provided. The display driver includes: a plurality of source amplifiers connected to a plurality of source lines of a display panel, wherein one of the plurality of source amplifiers includes an input stage and an output stage configured to output a grayscale voltage to a source line of the plurality of source lines; and a decoder circuit configured to provide at least one of a plurality of gamma voltages to the input stage based on image data. The output stage includes a plurality of unit circuits connected to each other in parallel between the input stage and an output pad connected to the source line. Each of the plurality of unit circuits includes a buffer switch and an output buffer connected to the input stage, and is connected to the output pad through a resistor.

公开(公告)号：US12165610B2

公开(公告)日：2024-12-10

申请号：US18097948

申请日：2023-01-17

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyounghwan Kwon ,  Wonseok Kim ,  Wangsuk Sung ,  Sangmin Lee ,  Seonmee Lee ,  Woonyoung Lee

IPC: G06F3/038 ,  G09G5/00

Abstract: An operating method of a display driver integrated circuit (DDI) includes determining whether a change to a level of a first logic voltage supplied to a logic circuit of the DDI is required, based on determining that a change to the level of the first logic voltage is required, transmitting a logic voltage setting command to a power management integrated circuit (PMIC), and receiving, from the PMIC, a second logic voltage having a level different from the first logic voltage and corresponding to the logic voltage setting command.

公开(公告)号：US12148341B2

公开(公告)日：2024-11-19

申请号：US18241177

申请日：2023-08-31

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Wonseok Kim ,  Woonyoung Lee ,  Yeongshin Jang

IPC: G09G3/20

Abstract: A display apparatus including a display driving circuit and a display panel is provided. The display driving circuit, connected to a display panel including a plurality of pixel groups, includes a controller configured to determine a driving order of each of the plurality of pixel groups in a first horizontal period and to generate image data and a selection signal in a first voltage range, a data driver configured to generate an image signal on the basis of the image data and to transfer the image signal to the plurality of data lines in the first horizontal period, a plurality of output pads respectively connected to the plurality of pixel groups through the plurality of data lines, and a data switching circuit configured to provide the image signal to the display panel through at least one of the plurality of output pads based on the selection signal.

公开(公告)号：US11769436B2

公开(公告)日：2023-09-26

申请号：US17589997

申请日：2022-02-01

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Wonseok Kim ,  Woonyoung Lee ,  Yeongshin Jang

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2310/0275 ,  G09G2310/08 ,  G09G2330/021

Abstract: A display apparatus including a display driving circuit and a display panel is provided. The display driving circuit, connected to a display panel including a plurality of pixel groups, includes a controller configured to determine a driving order of each of the plurality of pixel groups in a first horizontal period and to generate image data and a selection signal in a first voltage range, a data driver configured to generate an image signal on the basis of the image data and to transfer the image signal to the plurality of data lines in the first horizontal period, a plurality of output pads respectively connected to the plurality of pixel groups through the plurality of data lines, and a data switching circuit configured to provide the image signal to the display panel through at least one of the plurality of output pads based on the selection signal.

公开(公告)号：US11515848B2

公开(公告)日：2022-11-29

申请号：US17232762

申请日：2021-04-16

Applicant: Samsung Electronics Co., Ltd.

Inventor： Youngbae Moon ,  Woonyoung Lee ,  Chanbong Yu ,  Yunseok Jang

IPC: H03F3/45 ,  H02H9/04 ,  G09G3/3275 ,  G11C19/00

Abstract: An output buffer circuit includes an operational amplifier configured to generate an amplifier output voltage signal based on an input voltage signal and on a compensation current, a slew rate compensating circuit configured to generate the compensation current to increase a slew rate of the amplifier output voltage signal based on a difference between the input voltage signal and a feedback voltage signal, an output path circuit connected between the operational amplifier and an output pad, the output path circuit configured to transfer the amplifier output voltage signal to generate a pad output voltage signal through the output pad, and a feedback path circuit, the feedback path circuit connected between the slew rate compensating circuit and a feedback input node that is on the output path circuit, the feedback path circuit configured to generate the feedback voltage signal.

公开(公告)号：US20230335040A1

公开(公告)日：2023-10-19

申请号：US18083055

申请日：2022-12-16

Applicant: Samsung Electronics Co., Ltd.

Inventor： Chanbong YU ,  Yeongshin Jang ,  Woonyoung Lee

IPC: G09G3/20

CPC classification number: G09G3/2096 ,  G09G2310/0291 ,  G09G2320/0276 ,  G09G2310/08 ,  G09G2330/028

Abstract: A display driver is provided. The display driver includes: a plurality of source amplifiers connected to a plurality of source lines of a display panel, wherein one of the plurality of source amplifiers includes an input stage and an output stage configured to output a grayscale voltage to a source line of the plurality of source lines; and a decoder circuit configured to provide at least one of a plurality of gamma voltages to the input stage based on image data. The output stage includes a plurality of unit circuits connected to each other in parallel between the input stage and an output pad connected to the source line. Each of the plurality of unit circuits includes a buffer switch and an output buffer connected to the input stage, and is connected to the output pad through a resistor.

公开(公告)号：US11721262B2

公开(公告)日：2023-08-08

申请号：US17745246

申请日：2022-05-16

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jeeyeon Eom ,  Jeonghoon Choi ,  Yeongshin Jang ,  Youngbae Moon ,  Woonyoung Lee

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2300/0413 ,  G09G2310/0286 ,  G09G2310/0289 ,  G09G2310/0291 ,  G09G2330/08

Abstract: Provided is a display driving circuit including a plurality of source channels configured to provide data voltages to a plurality of data lines of a display panel, respectively; a dummy channel on one side of at least one of the source channels; and control logic configured to control operations of the source channels and the dummy channel, wherein, when failure of a first source channel from among the source channels is determined, the control logic is further configured to provide data voltages to data lines corresponding to the first source channel and second source channels, respectively, which are between the first source channel and the dummy channel, by using the second source channels and the dummy channel.