公开(公告)号：US20220199014A1

公开(公告)日：2022-06-23

申请号：US17513234

申请日：2021-10-28

Applicant: LG DISPLAY CO., LTD.

Inventor： Kwangpyo PARK ,  Bonghwan KIM

IPC: G09G3/3233 ,  G09G3/3291 ,  G09G3/3266

Abstract: Disclosed are an organic light emitting display device and a method for providing low luminance power thereof, in which a low potential voltage and an initialization voltage are provided to a display panel in a low luminance range such that a low potential voltage and an initialization voltage in a 60 Hz operation mode are respectively different from a low potential voltage and an initialization voltage in a 90 Hz operation mode. To this end, the device includes a data driver including a lookup table storing therein a low potential voltage and an initialization voltage corresponding to each gamma set such that a low potential voltage and an initialization voltage in a 60 Hz operation mode are respectively different from a low potential voltage and an initialization voltage in a 90 Hz operation mode. Therefore, the method compensates for an anode charging time in the low luminance range, thereby improving seamlessness.

公开(公告)号：US20230360602A1

公开(公告)日：2023-11-09

申请号：US18212944

申请日：2023-06-22

Applicant: LG DISPLAY CO., LTD.

Inventor： Kwangpyo PARK ,  Bonghwan KIM

IPC: G09G3/3233 ,  G09G3/3291 ,  G09G3/3266 ,  G09G3/3275 ,  G09G3/3225 ,  G09G3/3258

CPC classification number: G09G3/3233 ,  G09G3/3291 ,  G09G3/3266 ,  G09G3/3275 ,  G09G3/3225 ,  G09G3/3258 ,  G09G2320/0233 ,  G09G2310/08 ,  G09G2320/0626 ,  G09G2320/0673 ,  G09G2320/0276

Abstract: An organic light emitting display device and a method for providing low luminance power thereof includes a data driver including a lookup table storing therein a low potential voltage and an initialization voltage corresponding to each gamma set such that a low potential voltage and an initialization voltage in a 60 Hz operation mode are respectively different from a low potential voltage and an initialization voltage in a 90 Hz operation mode and a method compensates for an anode charging time in the low luminance range, thereby improving seamlessness.

公开(公告)号：US20230079102A1

公开(公告)日：2023-03-16

申请号：US17728676

申请日：2022-04-25

Applicant: LG Display Co., Ltd.

Inventor： Jaemin KIM ,  Subin PARK ,  Bonghwan KIM ,  Won-Seok SONG

IPC: G09G3/3291

Abstract: Embodiments of the present disclosure relate to a display device, comprising: a display panel including a light emitting element, a driving transistor configured to provide a driving current to the light emitting element, and a plurality of switching transistors configured to control an operation of the driving transistor; a gate driving circuit configured to supply a plurality of scan signals to the display panel; a data driving circuit configured to supply a plurality of data voltages to the display panel; and a timing controller configured to control the gate driving circuit and the data driving circuit, wherein a bias voltage is supplied to the driving transistor in a first period in which the data voltage is supplied to the display panel at a low speed mode which the display panel is driven at a low speed driving frequency.

公开(公告)号：US20180190224A1

公开(公告)日：2018-07-05

申请号：US15839533

申请日：2017-12-12

Applicant: LG DISPLAY CO., LTD.

Inventor： Bonghwan KIM ,  Wan Sik LIM

IPC: G09G3/36 ,  G09G3/02 ,  G09G3/20 ,  G09G3/34 ,  G09G3/3266

Abstract: A display device, a display panel, a driving method, and a gate driver circuit. Threshold voltage sampling times of driving transistors are changed by varying pulse widths of gate clock signals depending on horizontal lines. Luminance uniformity of the display panel is improved, even in the case in which horizontal line-specific driving voltages have different voltage drops.

公开(公告)号：US20230343843A1

公开(公告)日：2023-10-26

申请号：US18218491

申请日：2023-07-05

Applicant: LG Display Co., Ltd.

Inventor： Jaemin KIM ,  Subin PARK ,  Bonghwan KIM ,  Won-Seok SONG

IPC: H01L29/417 ,  H01L29/08 ,  H01L21/768 ,  H01L23/522 ,  H01L29/78

CPC classification number: H01L29/41791 ,  H01L29/0847 ,  H01L21/76877 ,  H01L23/5226 ,  H01L29/785

Abstract: Embodiments of the present disclosure relate to a display device, comprising: a display panel including a light emitting element, a driving transistor configured to provide a driving current to the light emitting element, and a plurality of switching transistors configured to control an operation of the driving transistor; a gate driving circuit configured to supply a plurality of scan signals to the display panel; a data driving circuit configured to supply a plurality of data voltages to the display panel; and a timing controller configured to control the gate driving circuit and the data driving circuit, wherein a bias voltage is supplied to the driving transistor in a first period in which the data voltage is supplied to the display panel at a low speed mode which the display panel is driven at a low speed driving frequency.

公开(公告)号：US20200211457A1

公开(公告)日：2020-07-02

申请号：US16730508

申请日：2019-12-30

Applicant: LG DISPLAY CO., LTD.

Inventor： Bonghwan KIM ,  Daekyung KIM

IPC: G09G3/3225 ,  G09G3/3275

Abstract: A luminance compensation device can include a luminance compensator configured to: receive a pixel driving voltage from a host system, the pixel driving voltage being supplied to both the luminance compensator and a display panel, receive a reference pixel driving voltage generated by a drive IC, compare the pixel driving voltage with the reference pixel driving voltage to detect a voltage drop in the pixel driving voltage, the voltage drop being a difference between the pixel driving voltage and the reference pixel driving voltage, amplify the voltage drop of the pixel driving voltage by a predetermined weighted value to generate an amplified voltage drop, and adjust a gamma reference voltage based on the amplified voltage drop to generate an adjusted gamma reference voltage.