公开(公告)号：US20220013065A1

公开(公告)日：2022-01-13

申请号：US17484596

申请日：2021-09-24

Applicant: LG DISPLAY CO., LTD.

Inventor： JungHyun LEE ,  Yewon HONG

IPC: G09G3/325 ,  G09G3/3275

Abstract: A display apparatus comprises a demultiplexing circuit portion that sequentially supplies data signals supplied from a data driving circuit to at least two data lines, and the demultiplexing circuit portion of the display apparatus comprises a switching portion that sequentially supplies the data signals to the at least two data lines based on a voltage of a control line; a voltage controller that controls the voltage of the control line in response to a time-division control signal; and a voltage discharge portion that discharges the voltage of the control line in response to the time-division control signal.

公开(公告)号：US20220069573A1

公开(公告)日：2022-03-03

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：US20220199032A1

公开(公告)日：2022-06-23

申请号：US17536143

申请日：2021-11-29

Applicant: LG DISPLAY CO., LTD.

Inventor： Yewon HONG

IPC: G09G3/3266 ,  G09G3/3225 ,  H01L27/12

Abstract: A gate driving circuit includes a first type of stage circuit for outputting a first gate signal and a second type of stage circuit for outputting a second gate signal, and further including a bias transistor for supplying, when turned-on, a bias voltage to a shield metal positioned to overlap with a semiconductor layer of a specific transistor among a plurality of transistors included in the first type of stage circuit, thereby preventing a leakage current from occurring inside the gate driving circuit.

公开(公告)号：US20220093028A1

公开(公告)日：2022-03-24

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：US20210181554A1

公开(公告)日：2021-06-17

申请号：US17108598

申请日：2020-12-01

Applicant: LG Display Co., Ltd.

Inventor： Yewon HONG ,  KwangMin JO ,  JungHyun LEE ,  Sohyung LEE ,  Hyun Soo SHIN

IPC: G02F1/1368 ,  G02F1/1362 ,  G02F1/1343 ,  H01L27/32

Abstract: Disclosed is a display apparatus and a method for manufacturing the same, wherein the display apparatus comprises a substrate, a light shielding layer and a signal line on the substrate, a buffer layer on the light shielding layer and the signal line, an active layer on the buffer layer, a gate insulating film on the active layer, a gate electrode on the gate insulating film, a protection layer on the gate electrode, a first electrode of a display device on the protection layer, and a connection electrode configured to connect the signal line and the active layer with each other, wherein the light shielding layer and the signal line are disposed on the same layer, and the connection electrode and the first electrode are formed of the same material.

公开(公告)号：US20210074218A1

公开(公告)日：2021-03-11

申请号：US17015597

申请日：2020-09-09

Applicant: LG Display Co., Ltd.

Inventor： Yeonwoo Shin ,  JungHyun LEE ,  Yewon HONG

IPC: G09G3/3258 ,  G09G3/3275 ,  G09G3/3266

Abstract: A display apparatus includes first to third demultiplexer circuits respectively providing a data signal, supplied from a data driver, to three data lines. Each of the first to third demultiplexer circuits includes a switching unit providing the data signal to a corresponding data line of the three data lines on the basis of a voltage of a corresponding control line of first to third control lines, a voltage controller controlling the voltage of the corresponding control line in response to a corresponding time division control signal of first to third time division control signals and a corresponding auxiliary signal of first to third auxiliary signals which partially overlap the first to third time division control signals respectively, and a voltage discharger discharging the voltage of the corresponding control line.

公开(公告)号：US20220199033A1

公开(公告)日：2022-06-23

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：US20210181590A1

公开(公告)日：2021-06-17

申请号：US17111267

申请日：2020-12-03

Applicant: LG Display Co., Ltd.

Inventor： Yewon HONG ,  JungHyun LEE ,  Hyun Soo SHIN

IPC: G02F1/1362 ,  H01L27/12

Abstract: Disclosed is a display apparatus and a method for manufacturing the same, wherein the display apparatus comprises a substrate, a light shielding layer, a signal line and a first electrode on the substrate, an active layer, a gate electrode, a second electrode, a first connection electrode for connecting the active layer with the signal line, and a second connection electrode for connecting the active layer with any one of the first electrode and the second electrode, wherein any one of the first electrode and the second electrode is a pixel electrode of a display device, and the other is a common electrode of the display device, the light shielding layer, the signal line and the first electrode are disposed on the same layer, and the first connection electrode and the second connection electrode are formed of the same material as that of the second electrode.

公开(公告)号：US20200027390A1

公开(公告)日：2020-01-23

申请号：US16513930

申请日：2019-07-17

Applicant: LG Display Co., Ltd.

Inventor： JungHyun LEE ,  Yewon HONG

IPC: G09G3/325 ,  G09G3/3275

Abstract: A display apparatus comprises a demultiplexing circuit portion that sequentially supplies data signals supplied from a data driving circuit to at least two data lines, and the demultiplexing circuit portion of the display apparatus comprises a switching portion that sequentially supplies the data signals to the at least two data lines based on a voltage of a control line; a voltage controller that controls the voltage of the control line in response to a time-division control signal; and a voltage discharge portion that discharges the voltage of the control line in response to the time-division control signal.

公开(公告)号：US20190131376A1

公开(公告)日：2019-05-02

申请号：US16163779

申请日：2018-10-18

Applicant: LG Display Co., Ltd.

Inventor： Yewon HONG ,  SungSoo SHIN ,  Hyelim JI ,  Sohee CHOI

IPC: H01L27/32 ,  G09G3/3266 ,  G09G3/3275

Abstract: A display apparatus includes a plurality of pixels each including an organic light emitting device and a pixel driving circuit. The pixel driving circuit includes a driving transistor controlling a driving current flowing in the organic light emitting device and a first, second, third, fourth, and fifth switching transistor, the third switching transistor selectively connecting a second node which is a drain electrode of the driving transistor to a third node which is a gate electrode of the driving transistor. The third switching transistor differs from a type of each of the driving transistor and the first, second, fourth, and fifth switching transistors. Accordingly, even when the organic light emitting display apparatus is driven at a low frequency, a bezel area is reduced, and a high resolution of a display panel is realized.