公开(公告)号：US20220130334A1

公开(公告)日：2022-04-28

申请号：US17490153

申请日：2021-09-30

Applicant: Samsung Display Co., LTD.

Inventor： Chang-Soo LEE ,  Boyong Chung ,  Jonghee Kim

IPC: G09G3/3241 ,  G09G3/3291

Abstract: A pixel circuit including an organic light emitting diode, a first transistor configured to drive the organic light emitting diode, a second transistor electrically connected between a gate node of the first transistor and a data line, a third transistor electrically connected between a source node of the first transistor and an initialization voltage line and a storage capacitor electrically connected between the gate node and the source node of the first transistor. In a data writing period in which the storage capacitor is charged with electric charges, a turn-off time of the third transistor lags compared to a turn-off time of the second transistor.

公开(公告)号：US20230101274A1

公开(公告)日：2023-03-30

申请号：US17955198

申请日：2022-09-28

Applicant: Samsung Display Co., Ltd.

Inventor： Chang-Soo LEE ,  Joosun YOON ,  Boyong CHUNG

IPC: G09G3/20 ,  G09G3/32

Abstract: A display apparatus includes a display panel including a plurality of pixels, a data driver to provide data voltages to the plurality of pixels and to sense threshold voltages of the pixels, and a driving controller to generate first difference values by calculating differences between the data voltages for first pixels included in an N-th pixel row and the data voltages for second pixels included in an (N+1)-th pixel row among the plurality of pixels in an initial driving period, to calculate limit offset values for the second pixels based on the first difference values, to generate threshold voltage compensation values for the second pixels based on the threshold voltages of the second pixels, and to compensate input image data for the second pixels based on the threshold voltage compensation values and the limit offset values, where N is an integer greater than 0.

公开(公告)号：US20190027109A1

公开(公告)日：2019-01-24

申请号：US16028650

申请日：2018-07-06

Applicant: Samsung Display Co., Ltd.

Inventor： Chang-Soo LEE

IPC: G09G3/36

Abstract: A display apparatus includes a display panel displaying an image and including a gate line and a data line, a gate driver outputting a gate signal to the gate line, a data driver outputting a data signal to the data line, a timing controller outputting a vertical start signal and a gate clock, and a gate clock signal compensator generating an inner clock signal based on the vertical start signal, selecting one of the gate clock signal and the inner clock signal based on a comparison result of a time difference between the gate clock signal and the inner clock signal and a reference time which corresponds to tolerance of jitter of the gate clock signal, increasing a level of the selected clock signal, and outputting the increased clock signal to the gate driver, where the gate driver generates the gate signal based on the increased clock signal.

公开(公告)号：US20220223672A1

公开(公告)日：2022-07-14

申请号：US17475321

申请日：2021-09-14

Applicant: Samsung Display Co., LTD.

Inventor： Chang-Soo LEE ,  Bo Yong Chung ,  Tak-Young Lee

IPC: H01L27/32

Abstract: A light emitting display device including a first pixel including a first driving transistor, a first input transistor, a first initialization transistor, a first storage capacitor, and a first light emitting diode (LED); and a second pixel including a second driving transistor, a second input transistor, a second initialization transistor, a second storage capacitor, and a second light emitting diode (LED. The first pixel further includes a first gate electrode connecting member connecting a first gate electrode of the first driving transistor and the first input transistor; the second pixel further includes a second gate electrode connecting member connecting a second gate electrode of the second driving transistor and the second input transistor; the first light emitting diode (LED) includes a first anode; the second light emitting diode (LED) includes a second anode; and the first gate electrode connecting member does not overlap the second anode in a plan view.

公开(公告)号：US20210104191A1

公开(公告)日：2021-04-08

申请号：US16846419

申请日：2020-04-13

Applicant: Samsung Display Co., Ltd.

Inventor： Chang-Soo LEE

IPC: G09G3/20

Abstract: A display device includes a display panel including a plurality of gate lines having a desired gate delay time, and a plurality of pixel rows, each of the plurality of pixel rows coupled to a corresponding one of the plurality of gate lines, a gate driver configured to sequentially provide a plurality of gate signals to the plurality of gate lines, a data driver configured to provide data signals to each of the plurality of pixel rows, and a controller configured to control the gate driver to sequentially output the plurality of gate signals and to control the data driver to output the data signals that are delayed by the desired gate delay time of the plurality of gate lines.

公开(公告)号：US20200234653A1

公开(公告)日：2020-07-23

申请号：US16568755

申请日：2019-09-12

Applicant: Samsung Display Co., LTD.

Inventor： Chang-Soo LEE

IPC: G09G3/3291 ,  G09G3/36

Abstract: A display device includes a display unit which includes pixels and gate lines and data lines connected to the pixels, a data driver connected to the data lines, and a signal controller which outputs a first frequency data control signal to the data driver at a predetermined frame frequency and outputs a second frequency data control signal to the data driver in synchronization with a vertical synchronization signal received from a graphics processing unit, wherein the data driver outputs a first data voltage to the data lines in accordance with the first frequency data control signal, and stops the output of the first data voltage and outputs a second data voltage to the data lines when the second frequency data control signal is inputted while outputting the first data voltage to the data lines.

公开(公告)号：US20180144675A1

公开(公告)日：2018-05-24

申请号：US15425398

申请日：2017-02-06

Applicant: Samsung Display Co., Ltd.

Inventor： Chang-Soo LEE ,  Mugyeom KIM ,  Sungjae PARK

IPC: G09G3/20 ,  F21V33/00 ,  G02F1/1333 ,  H01L27/32 ,  H01L51/52

CPC classification number: G09G3/2003 ,  F21V33/0052 ,  F21Y2113/10 ,  F21Y2115/10 ,  G02F1/133308 ,  G02F2001/13332 ,  G09G3/2092 ,  G09G2300/0413 ,  G09G2300/0426 ,  G09G2310/0232 ,  H01L27/3211 ,  H01L27/326 ,  H01L51/524

Abstract: a display device may include: a display unit including: a display area having a plurality of pixels to display an image; and a non-display area surrounding the display area; and a frame covering at least a portion of the non-display area, the frame having a rounded outer corner and an inner corner, wherein the plurality of pixels includes a first pixel disposed between the inner corner and a curved line or under the curved line, and wherein the display device is configured to operate the first pixel to constantly generate a first color while the image is displayed.

公开(公告)号：US20180012533A1

公开(公告)日：2018-01-11

申请号：US15476133

申请日：2017-03-31

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Chang-Soo LEE ,  Kookhyun CHOI

IPC: G09G3/20

CPC classification number: G09G3/2092 ,  G09G2310/0267 ,  G09G2310/0286 ,  G09G2310/0289 ,  G09G2310/08 ,  G09G2320/041 ,  G09G2330/028

Abstract: A display apparatus includes a display panel, a gate driver, and a gate driving control circuit. The gate driver is connected to the display panel, and generates gate signals for driving the display panel using a gate clock signal. The gate driving control circuit generates the gate clock signal using a gate on voltage and a gate off voltage, determines whether an operation environment is an abnormal temperature environment by comparing a first feedback gate signal with a second feedback gate signal, and adjusts a voltage level of the gate clock signal in the abnormal temperature environment. The first feedback gate signal is retrieved from the display panel while a first frame image is displayed on the display panel. The second feedback gate signal is retrieved from the display panel while a second frame image subsequent to the first frame image is displayed on the display panel.

公开(公告)号：US20210118386A1

公开(公告)日：2021-04-22

申请号：US16860955

申请日：2020-04-28

Applicant: Samsung Display Co., Ltd.

Inventor： Sang Yong NO ,  Chang-Soo LEE

IPC: G09G3/36

Abstract: A display device includes: a switching element connected to a gate line and a data line; a liquid crystal capacitor including a pixel electrode that is connected to the switching element and a common electrode to which a common voltage is applied; and a storage capacitor including a first electrode that is connected to the switching element and a second electrode to which a storage voltage is applied. The display device is operable at a variable frame frequency between a maximum frame frequency and a minimum frame frequency. Capacitance of the storage capacitor is set according to a difference between the maximum frame frequency and the minimum frame frequency, and the storage voltage is greater than the common voltage by more than a predetermined level.

公开(公告)号：US20200020265A1

公开(公告)日：2020-01-16

申请号：US16403332

申请日：2019-05-03

Applicant: Samsung Display Co., Ltd.

Inventor： Chang-Soo LEE

IPC: G09G3/20

Abstract: A display device includes a display panel, a voltage generator configured to generate a gate driving voltage, a timing controller configured to generate a clock control signal, a gate controller configured to generate gate clock signals, a gate driver configured to generate a gate signal, an over current protection circuit configured to generate a gate clock current corresponding to the gate clock signals and output a shutdown control signal, and an abnormal signal detector configured to determine whether the clock control signal is abnormal based on a difference of a set reference signal and the clock control signal, and output a delay control signal that delays an output timing of the shutdown control signal from the over current protection circuit for a set time when the clock control signal is abnormal.