公开(公告)号：US10685617B2

公开(公告)日：2020-06-16

申请号：US16110304

申请日：2018-08-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Taegon Im ,  Boyeon Kim ,  Dongwon Park ,  Junghwan Cho

IPC: G09G3/36

Abstract: A display device having a charging compensation circuit to reduce/eliminate display stains based on pixels being charged at unequal charging rates. A data driving circuit of a display device includes an output circuit for converting an image signal into a data signal in response to a clock signal, and providing the data signal to a plurality of data lines, and a clock generating and compensating circuit for receiving a main clock signal and generating the clock signal, wherein the clock generating and compensating circuit detects a slew rate of the data signal provided to at least one of the plurality of data lines, and adjusts a phase of the clock signal depending on the detected slew rate.

公开(公告)号：US10586506B2

公开(公告)日：2020-03-10

申请号：US15446763

申请日：2017-03-01

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Taegon Im ,  Wontae Kim ,  Guhui Jo

IPC: G09G3/36

Abstract: A display device includes a display panel, a timing controller, a data driver, and a light source unit. The display panel includes a plurality of data lines. The timing controller receives a control signal and image data, and outputs a data control signal, converted image data, and a mode selection signal. The data driver receives the data control signal, the converted image data, and the mode selection signal from the timing controller, outputs a data voltage to the plurality of data lines, and operates in a first mode which is a power saving mode or a second mode which is a normal driving mode in response to the mode selection signal. The light source unit includes a light source part that operates in association with a source driving circuit included in the data driver.

公开(公告)号：US10354600B2

公开(公告)日：2019-07-16

申请号：US15158395

申请日：2016-05-18

Applicant: Samsung Display Co., Ltd.

Inventor： Byung-kyou Min ,  Youngsup Kwon ,  Taegon Im

IPC: G09G3/32 ,  G09G3/36 ,  G09G3/34 ,  G09G3/20

Abstract: According to some embodiments of the inventive concept, there is provided a liquid crystal display device including a backlight including a light source configured to emit first to N-th block lights respectively to first to N-th sub-frames, in a first direction, the first to N-th sub-frames being obtained by dividing a frame in time, and a display panel including pixels arranged in a matrix form and grouped into first to N-th row blocks along the first direction, the pixels being configured to display an image using the first to N-th block lights, and operations of the first to N-th row blocks being respectively synchronized with the first to N-th sub-frames, wherein a brightness of a K-th block light among the first to N-th block lights is determined on a basis of light source brightness data of a K-th row block among the first to N-th row blocks.

公开(公告)号：US11715440B2

公开(公告)日：2023-08-01

申请号：US17541616

申请日：2021-12-03

Applicant: Samsung Display Co., Ltd.

Inventor： Gwangsoo Ahn ,  Jong Jae Lee ,  Taegon Im

IPC: G09G3/36 ,  G09G5/00

CPC classification number: G09G5/008 ,  G09G3/36 ,  G09G2330/02

Abstract: A display device may include a display panel including a gate line, a data line, and a pixel electrically connected to the gate line and the data line, where display panel displays an image based on input image data, a gate driver which outputs a gate signal to the gate line, a data driver which outputs a data voltage to the data line, and a power supply voltage generator which provides a driving voltage to the display panel, the gate driver and the data driver. The power supply voltage generator generates a gate clock signal based on an on-clock signal and an off-clock signal and changes a count value of the on-clock signal or the off-clock signal when the gate clock signal is an abnormal signal.

公开(公告)号：US11514832B2

公开(公告)日：2022-11-29

申请号：US17374893

申请日：2021-07-13

Applicant: Samsung Display Co., Ltd.

Inventor： Sooyeon Kim ,  Taegon Im ,  Jihyun Kim ,  Jiye Lee

IPC: G09G3/20

Abstract: A display apparatus includes a display panel, a gamma reference voltage generator and a data driver. The gamma reference voltage generator is configured to generate a gamma reference voltage. The gamma reference voltage includes a gamma amplifier configured to output the gamma reference voltage. The data driver is configured to generate a data voltage based on the gamma reference voltage and to output the data voltage to the display panel. A polarity of an offset voltage of the gamma amplifier is inverted alternately in a unit of one frame and in a unit of two frames.

公开(公告)号：US11288997B1

公开(公告)日：2022-03-29

申请号：US17354695

申请日：2021-06-22

Applicant: Samsung Display Co., Ltd.

Inventor： Taegon Im ,  Gwangsoo Ahn ,  Jong Jae Lee ,  Byungkil Jeon

IPC: G09G3/20

Abstract: A display device includes a display panel including a plurality of data lines, and a plurality of pixels coupled to the plurality of data lines, a data driver including a plurality of channels providing data voltages to the plurality of pixels through the plurality of data lines, and a controller configured to control the data driver. The plurality of channels is grouped into first through N-th channel groups, where N is an integer greater than 1. The first through N-th channel groups sequentially initiate first dummy data voltage output operations in a first order from the first channel group to the N-th channel group in a first blank period before an active period, and sequentially finish second dummy data voltage output operations in a second order from the N-th channel group to the first channel group in a second blank period after the active period.

公开(公告)号：US11017736B2

公开(公告)日：2021-05-25

申请号：US15646536

申请日：2017-07-11

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Boyeon Kim ,  Wontae Kim ,  Taegon Im

IPC: G09G3/36

Abstract: A display device may include a data driver that outputs a previous data voltage and a current data voltage, respectively, at an output terminal, to be applied to a pixel of a display panel in respective time intervals. A switch is controlled to open and close a circuit path between the output terminal and a data line coupled to the pixel. A capacitor stores an overdriving voltage. At least one further switch selectively applies the overdriving voltage to the data line from the capacitor when the circuit path is open and thereby enables a rapid transition of a voltage level of the data line between the previous and current data voltages, when the current and previous data voltages are to differ by more than a predetermined amount. As an example, the rapid transition between the previous and current data voltages may serve to minimize a color mixture phenomenon between pixels connected to a common data line and representing different colors.

公开(公告)号：US20190066621A1

公开(公告)日：2019-02-28

申请号：US16110304

申请日：2018-08-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Taegon Im ,  Boyeon Kim ,  Dongwon Park ,  Junghwan Cho

IPC: G09G3/36

CPC classification number: G09G3/3688 ,  G09G3/3677 ,  G09G3/3696 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/041

Abstract: A display device having a charging compensation circuit to reduce/eliminate display stains based on pixels being charged at unequal charging rates. A data driving circuit of a display device includes an output circuit for converting an image signal into a data signal in response to a clock signal, and providing the data signal to a plurality of data lines, and a clock generating and compensating circuit for receiving a main clock signal and generating the clock signal, wherein the clock generating and compensating circuit detects a slew rate of the data signal provided to at least one of the plurality of data lines, and adjusts a phase of the clock signal depending on the detected slew rate.

公开(公告)号：US20140145626A1

公开(公告)日：2014-05-29

申请号：US13904367

申请日：2013-05-29

Applicant: Samsung Display Co., Ltd.

Inventor： Min-Soo CHOI ,  Kyunho Kim ,  Eun Chul Shin ,  Hwanwoong Lee ,  Taegon Im

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0827 ,  Y02B20/347

Abstract: In a display device, a backlight unit including a power converter configured to generate a light source driving voltage in response to a voltage control signal, a plurality of light emitting diode strings each configured to receive the light source driving voltage through an end thereof, and a controller connected to the other end of each of the plurality of light emitting diode stringsand configured to generate a plurality of current control signals used to control a current flowing through each of the plurality of light emitting diode strings and the voltage control signal. The controller is configured to generate the voltage control signal in response to a current control signal from among the plurality of current control signals, which is applied to a light emitting diode string configured to receive a lowest forward driving voltage among the plurality of light emitting diode strings.

Abstract translation: 在显示装置中，包括被配置为响应于电压控制信号产生光源驱动电压的功率转换器的背光单元，多个发光二极管串，每个被配置为通过其端部接收光源驱动电压;以及 控制器连接到多个发光二极管串中的每一个的另一端，并被配置为产生用于控制流过多个发光二极管串中的每一个的电流和电压控制信号的多个电流控制信号。 控制器被配置为响应于来自多个电流控制信号的电流控制信号而产生电压控制信号，该电流控制信号被施加到被配置为在多个发光二极管中接收最低正向驱动电压的发光二极管串 字符串。

公开(公告)号：US20220093025A1

公开(公告)日：2022-03-24

申请号：US17374893

申请日：2021-07-13

Applicant: Samsung Display Co., Ltd.

Inventor： SOOYEON KIM ,  Taegon Im ,  Jihyun Kim ,  Jiye Lee

IPC: G09G3/20

Abstract: A display apparatus includes a display panel, a gamma reference voltage generator and a data driver. The gamma reference voltage generator is configured to generate a gamma reference voltage. The gamma reference voltage includes a gamma amplifier configured to output the gamma reference voltage. The data driver is configured to generate a data voltage based on the gamma reference voltage and to output the data voltage to the display panel. A polarity of an offset voltage of the gamma amplifier is inverted alternately in a unit of one frame and in a unit of two frames.