公开(公告)号：US20200027405A1

公开(公告)日：2020-01-23

申请号：US16517178

申请日：2019-07-19

Applicant: LG Display Co., Ltd.

Inventor： JungHyun Lee ,  Yewon Hong ,  TaeWoong Moon

IPC: G09G3/3291 ,  G09G3/3225

Abstract: A display apparatus is disclosed, which comprises a demultiplexing circuit portion for sequentially supplying data signals supplied from a data driving circuit to at least two data lines, the demultiplexing circuit portion including a switching portion for sequentially supplying the data signals to at least two data lines based on a voltage of a control line, a voltage controller for controlling the voltage of the control line in response to a time-division control signal and an auxiliary signal partially overlapped with the time-division control signal, and a voltage discharge portion for discharging the voltage of the control line in response to the time-division control signal. Therefore, an off current capable of being transferred to an organic light emitting diode may be prevented from occurring, a bezel area may be minimized, and an image of high resolution of a display panel may be embodied.

公开(公告)号：US11468812B2

公开(公告)日：2022-10-11

申请号：US17366445

申请日：2021-07-02

Applicant: LG Display Co., Ltd.

Inventor： Yeonkyung Kim ,  TaeWoong Moon ,  JunHyeon Bae ,  Yewon Hong ,  Yeonwoo Shin

IPC: H02H9/04 ,  H01L27/02 ,  G09G3/20

Abstract: A display apparatus comprises a display panel on which a plurality of pixels are displayed, a plurality of signal lines to which a signal required to drive the display panel is supplied, and an electrostatic discharge circuit connected between each of the plurality of signal lines and the electrostatic discharge line. The electrostatic discharge circuit includes first and second current paths between the signal line and the electrostatic discharge line, a first electrostatic discharge circuit connected to the first current path, including a plurality of first thin film transistors having a first gate electrode connected to the second current path and a second gate electrode connected to the first current path, and a second electrostatic discharge circuit connected to the second current path, including at least one second thin film transistor having a first gate electrode connected to the first current path and a second gate electrode connected to the first current path.

公开(公告)号：US11443674B2

公开(公告)日：2022-09-13

申请号：US17465731

申请日：2021-09-02

Applicant: LG Display Co., Ltd.

Inventor： Yewon Hong ,  TaeWoong Moon ,  JunHyeon Bae ,  Yeonkyung Kim ,  Yeonwoo Shin

IPC: G09G3/20

Abstract: A display device having a gate driver, which may reduce a leakage current of a TFT and power consumption, is disclosed. Each stage of the gate driver comprises an output portion including a pull-up transistor outputting a corresponding clock of a plurality of clocks as a gate signal in response to control of a Q node, and a pull-down transistor outputting a first gate-off voltage as an off-voltage of a gate signal in response to control of a QB node; a controller charging and discharging the Q node and charging and discharging the QB node to be in an opposite state of the Q node; and a back bias circuit having a back bias node capacitance-coupled with the Q node and generating a second gate-off voltage lower than the first gate-off voltage to apply the second gate-off voltage to the back bias node for an off-period of the Q node, wherein the back bias circuit may apply the back gate bias voltage to light shielding layers of some transistors, which are turned off for the off-period of the Q node, among transistors constituting the output portion and the controller, through the back bias node, thereby reducing or minimizing a leakage current of the corresponding transistors.

公开(公告)号：US11322068B2

公开(公告)日：2022-05-03

申请号：US17465723

申请日：2021-09-02

Applicant: LG Display Co., Ltd.

Inventor： Yewon Hong ,  TaeWoong Moon ,  JunHyeon Bae ,  Yeonkyung Kim ,  Yeonwoo Shin

IPC: G09G3/20

Abstract: A display device having a gate driver, which may reduce a leakage current of a TFT and power consumption, is disclosed. Each stage of the gate driver comprises an output portion including a pull-up transistor outputting a corresponding clock of a plurality of clocks as a gate signal in response to control of a Q node, and a pull-down transistor outputting a gate-off voltage as an off-voltage of a gate signal in response to control of a QB node; a controller charging and discharging the Q node and charging and discharging the QB node to be in an opposite state of the Q node; and a back bias circuit having a back bias node capacitance-coupled with the Q node and generating a back gate bias voltage to apply the back gate bias voltage to the back bias node for an off-period of the Q node, wherein the back bias circuit may apply the back gate bias voltage to light shielding layers of some transistors, which are turned off for the off-period of the Q node, among transistors constituting the output portion and the controller, through the back bias node, thereby reducing or minimizing a leakage current of the corresponding transistors.

公开(公告)号：US11151920B2

公开(公告)日：2021-10-19

申请号：US16504029

申请日：2019-07-05

Applicant: LG DISPLAY CO., LTD.

Inventor： Yewon Hong ,  JungHyun Lee ,  TaeWoong Moon

IPC: G09G3/20 ,  G09G3/3275 ,  G09G3/36

Abstract: A demultiplexer for sequentially outputting a data signal to a plurality of data lines disposed in a display panel can include a first switch connected to a first control node, the first switch being configured to electrically connect a first channel with a first data line among the plurality of data lines; a second switch connected to a second control node, the first switch being configured to electrically connect the first channel with a second data line among the plurality of data lines; a third switch connected to a third control node, the third switch being configured to electrically connect a second channel with a third data line among the plurality of data lines; and a fourth switch connected to a fourth control node, the fourth switch being configured to electrically connect the second channel with a fourth data line among the plurality of data lines, in which the first control node and the third control node are configured to receive a single first control signal, and be electrically disconnected from each other at a point in time, the second control node and the fourth control node are configured to receive a single second control signal, and be electrically disconnected from each other at a point in time, and the first control node and the third control node have different voltage conditions than the second control node and the fourth control node.

公开(公告)号：US09019187B2

公开(公告)日：2015-04-28

申请号：US13728028

申请日：2012-12-27

Applicant: LG Display Co., Ltd.

Inventor： TaeWoong Moon ,  YounGyoung Chang ,  ChongHun Park ,  IlKi Jung

IPC: G09G3/36

CPC classification number: G09G3/3685 ,  G09G2300/0413 ,  G09G2310/0297 ,  G09G2320/045

Abstract: The present invention relates to a liquid crystal display (LCD) device. More particularly, the present invention relates to an LCD device including a thin film transistor (TFT) compensation circuit in an LCD device which implements a driving circuit by using an oxide TFT, the LCD device capable of compensating for degraded characteristics of a TFT due to threshold voltage shift. As the compensation circuit including a dummy TFT is formed on a non-active area of the LC panel, the degree of threshold voltage shift of the DT due to a DC voltage can be sensed. Based on the sensed result, a threshold voltage of a second TFT can be compensated. This can reduce lowering of a device characteristic.

Abstract translation: 本发明涉及液晶显示（LCD）装置。 更具体地说，本发明涉及一种LCD装置，其包括在通过使用氧化物TFT实现驱动电路的LCD装置中的薄膜晶体管（TFT）补偿电路，该LCD装置能够补偿由于 阈值电压偏移。 由于包括虚拟TFT的补偿电路形成在LC面板的非有源区域上，所以可以感测到由于DC电压引起的DT的阈值电压偏移程度。 基于感测结果，可以补偿第二TFT的阈值电压。 这可以降低设备特性的降低。

公开(公告)号：US11600232B2

公开(公告)日：2023-03-07

申请号：US17550818

申请日：2021-12-14

Applicant: LG Display Co., Ltd.

Inventor： Yewon Hong ,  Yeonwoo Shin ,  TaeWoong Moon

IPC: G09G3/3266 ,  G09G3/3275

Abstract: One or more embodiments of the present disclosure relate to a display device and a gate driving circuit. There is further provided with a synchronization transistor controlled according to a voltage of a Q node of a m-th scan driver (e.g., a second scan driver) and controlling an electrical connection between an output terminal of the n-th light emitting driver and a clock input terminal of the m-th scan driver, so that the rising characteristic and/or the falling characteristic of the light emission signal which is a type of the gate signal can be improved, thereby improving a threshold voltage compensation performance of the driving transistor and the image quality.

公开(公告)号：US20220093027A1

公开(公告)日：2022-03-24

申请号：US17465723

申请日：2021-09-02

Applicant: LG Display Co., Ltd.

Inventor： Yewon Hong ,  TaeWoong Moon ,  JunHyeon Bae ,  Yeonkyung Kim ,  Yeonwoo Shin

IPC: G09G3/20

Abstract: A display device having a gate driver, which may reduce a leakage current of a TFT and power consumption, is disclosed. Each stage of the gate driver comprises an output portion including a pull-up transistor outputting a corresponding clock of a plurality of clocks as a gate signal in response to control of a Q node, and a pull-down transistor outputting a gate-off voltage as an off-voltage of a gate signal in response to control of a QB node; a controller charging and discharging the Q node and charging and discharging the QB node to be in an opposite state of the Q node; and a back bias circuit having a back bias node capacitance-coupled with the Q node and generating a back gate bias voltage to apply the back gate bias voltage to the back bias node for an off-period of the Q node, wherein the back bias circuit may apply the back gate bias voltage to light shielding layers of some transistors, which are turned off for the off-period of the Q node, among transistors constituting the output portion and the controller, through the back bias node, thereby reducing or minimizing a leakage current of the corresponding transistors.

公开(公告)号：US11210983B2

公开(公告)日：2021-12-28

申请号：US16597697

申请日：2019-10-09

Applicant: LG Display Co., Ltd.

Inventor： YongHo Jang ,  TaeWoong Moon ,  Uyhyun Choi

IPC: G09G3/3275 ,  G09G3/20

Abstract: The present disclosure relates to a display, and more particularly, to a display including a multiplexer capable of implementing a high-voltage driving, a low-consumption power driving, and a high-speed switching. A display including a multiplexer according to the present disclosure includes a data driver for outputting image data; a multiplexer connected with the data driver through a driving line; a display panel connected with the multiplexer through a data line; and a gate driver connected with the display panel through a gate line, and the multiplexer includes a first TFT controlled by the charging and the discharging of a first mux line; and a second TFT controlled by the charging and the discharging of a second mux line.

公开(公告)号：US11132955B2

公开(公告)日：2021-09-28

申请号：US16517178

申请日：2019-07-19

Applicant: LG Display Co., Ltd.

Inventor： JungHyun Lee ,  Yewon Hong ,  TaeWoong Moon

IPC: G09G3/32 ,  G09G3/36 ,  G09G3/20 ,  H01L27/32 ,  H03F3/50 ,  G09G3/3291 ,  G09G3/3225 ,  H01L27/12

Abstract: A display apparatus is disclosed, which comprises a demultiplexing circuit portion for sequentially supplying data signals supplied from a data driving circuit to at least two data lines, the demultiplexing circuit portion including a switching portion for sequentially supplying the data signals to at least two data lines based on a voltage of a control line, a voltage controller for controlling the voltage of the control line in response to a time-division control signal and an auxiliary signal partially overlapped with the time-division control signal, and a voltage discharge portion for discharging the voltage of the control line in response to the time-division control signal. Therefore, an off current capable of being transferred to an organic light emitting diode may be prevented from occurring, a bezel area may be minimized, and an image of high resolution of a display panel may be embodied.