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公开(公告)号：US12080228B2
公开(公告)日：2024-09-03
申请号：US18468220
申请日：2023-09-15
Applicant: LG Display Co., Ltd.
Inventor： WooKyu Sang , Moonsoo Chung , Taehun Kim
CPC classification number: G09G3/32 , H01L27/156 , H01L33/60 , G09G2300/0408 , G09G2300/0426 , G09G2300/0819 , G09G2300/0852 , G09G2300/0861 , G09G2310/0202 , G09G2310/08 , G09G2320/0233 , G09G2320/0252 , G09G2320/045
Abstract: A display device includes a pixel circuit connected to a light emitting element. The pixel circuit includes a driving transistor having a gate electrode, a source electrode, and a drain electrode, and a capacitor connected with the gate electrode. The pixel circuit is driven according to a first period when a reference voltage is applied to the gate electrode, a second period when a gate-source voltage difference of the driving transistor is a threshold voltage of the driving transistor, a third period when the reference voltage is applied to the capacitor, and a voltage of the gate electrode varies due to a coupling phenomenon of the capacitor, a fourth period when a high-potential voltage higher than the reference voltage is applied to the source electrode, and a fifth period when the driving transistor is turned on to cause the light emitting element to emit light.
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公开(公告)号：US10515604B2
公开(公告)日：2019-12-24
申请号：US15710583
申请日：2017-09-20
Applicant: LG DISPLAY CO., LTD.
Inventor： Moonsoo Chung , Yousung Nam
Abstract: A liquid-crystal display device and a driving method thereof are disclosed. The driving method of the liquid-crystal display device comprises: generating first and second power supply voltages; generating gamma-compensated voltages based on the first and second power supply voltages; converting data of an input image to the gamma-compensated voltages to output data voltages; distributing, by a multiplexer, the data voltages output from the data driver to a plurality of data lines; and varying at least one of the first and second power supply voltages at a given time interval.
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公开(公告)号：US10210815B2
公开(公告)日：2019-02-19
申请号：US15333597
申请日：2016-10-25
Applicant: LG DISPLAY CO., LTD.
Inventor： DaeSeok Oh , Moonsoo Chung
IPC: G09G3/36 , G09G3/34 , G02F1/1343 , G02F1/1368 , G02F1/1333 , G02F1/1335
Abstract: A dimming control method of a backlight unit of a liquid crystal display (LCD) device driven at a driving frequency (f) of 60 Hz or lower includes a first step of driving the backlight unit using a first dimming value, and a second step of driving the backlight unit using a second dimming value higher than the first dimming value. The first step and the second step are alternately repeated and a repetition number of the second step within one period T of a driving frequency (f) is set to satisfy a condition of “{(60/f)−1}”. Here, f is a natural number lower than 60.
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公开(公告)号：US12183268B2
公开(公告)日：2024-12-31
申请号：US18368371
申请日：2023-09-14
Applicant: LG Display Co., Ltd.
Inventor： Taehun Kim , Wookyu Sang , Moonsoo Chung
IPC: G09G3/32 , G09G3/20 , G09G3/3233 , G09G3/3258 , G09G3/3266 , H01L25/075 , H01L33/36
Abstract: A display device can include a light emitting element and a pixel circuit including a driving transistor; a first capacitor connected between the driving transistor and a first node; a first transistor connected between the first capacitor and a data line to operate based on a first scan signal; a first light emission transistor connected between the first capacitor and a reference voltage line to operate based on a light emission signal; and a second light emission transistor connected between the driving transistor and a low-potential voltage line to operate based on the light emission signal. The first scan signal sequentially includes a dummy scan signal section and driving scan signal section for turning on the first transistor, and the light emission signal includes a coupling period for turning on the first and second light emission transistors between the dummy scan signal section and the driving scan signal section.
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公开(公告)号：US12165590B2
公开(公告)日：2024-12-10
申请号：US18486090
申请日：2023-10-12
Applicant: LG Display Co., Ltd.
Inventor： WooKyu Sang , Moonsoo Chung
IPC: G09G3/3233 , G09G3/3266 , G09G3/3283
Abstract: Disclosed is an electroluminescent display device using a variable refresh rate (VRR) mode. The purpose of the present disclosure is to reduce the occurrence of a difference in luminance at a time point of a refresh rate change, thereby preventing viewers from perceiving the variation of the refresh rate.
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Patent Agency Ranking
公开(公告)号：US20240038172A1
公开(公告)日：2024-02-01
申请号：US18486090
申请日：2023-10-12
Applicant: LG Display Co., Ltd.
Inventor： WooKyu Sang , Moonsoo Chung
IPC: G09G3/3233
CPC classification number: G09G3/3233 , G09G3/3266
Abstract: Disclosed is an electroluminescent display device using a variable refresh rate (VRR) mode. The purpose of the present disclosure is to reduce the occurrence of a difference in luminance at a time point of a refresh rate change, thereby preventing viewers from perceiving the variation of the refresh rate.
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公开(公告)号：US10860126B2
公开(公告)日：2020-12-08
申请号：US16192588
申请日：2018-11-15
Applicant: LG Display Co., Ltd.
Inventor： Joohee Lee , Moonsoo Chung , Yonghwa Park
Abstract: A display device with built-in touch sensors comprises: a display panel with built-in touch sensors; and a touch driver that converts a sensed voltage of the touch sensors into sensed data, wherein the touch driver comprises: an enable signal generator that compares the sensed voltage with a preset offset voltage and outputs an enable signal at a first level if the sensed voltage is higher than or equal to the offset voltage and outputs the enable signal at a second level if the sensed voltage is lower than the offset voltage; and an analog-to-digital converter that converts the sensed voltage into the sensed data when the enable signal is at the first level.
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公开(公告)号：US11978387B2
公开(公告)日：2024-05-07
申请号：US18221610
申请日：2023-07-13
Applicant: LG Display Co., Ltd.
Inventor： Taehun Kim , WooKyu Sang , Moonsoo Chung
IPC: G09G3/20 , G09G3/3233
CPC classification number: G09G3/2096 , G09G3/2007 , G09G3/3233 , G09G2300/0819 , G09G2300/0842 , G09G2300/0861 , G09G2310/0262 , G09G2310/08 , G09G2320/0247 , G09G2340/0442
Abstract: A display device can include a light-emitting element, a driving transistor providing a driving current to the light-emitting element using a driving voltage, and a plurality of switching transistors controlling driving of the driving transistor are disposed on a display panel. A gate driving circuit supplies scan signals to the display panel through gate lines. An emission driving circuit supplies a plurality of emission signals to the display panel through a plurality of emission signal lines. A data driving circuit supplies a data voltage to the display panel. A timing controller divides the display panel into a plurality of blocks and controls a level of a bias voltage applied to the driving transistor of a corresponding block among the plurality of blocks according to a grayscale of the data voltage supplied to the corresponding block in a low-speed mode operating at a low-speed driving frequency.
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公开(公告)号：US20240038155A1
公开(公告)日：2024-02-01
申请号：US18485048
申请日：2023-10-11
Applicant: LG Display Co., Ltd.
Inventor： Moonsoo Chung , Wookyu Sang
IPC: G09G3/3208
CPC classification number: G09G3/3208 , G09G2310/08 , G09G2320/0252 , G09G2320/0233
Abstract: An electroluminescent display device using a variable refresh rate (VRR) mode. The occurrence of a difference in luminance at a time point of a refresh rate change is reduced, thereby preventing viewers from perceiving the change of the refresh rate.
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公开(公告)号：US11545083B2
公开(公告)日：2023-01-03
申请号：US17472399
申请日：2021-09-10
Applicant: LG Display Co., Ltd.
Inventor： Moonsoo Chung , Wookyu Sang
IPC: G09G3/3208
Abstract: An electroluminescent display device using a variable refresh rate (VRR) mode. The occurrence of a difference in luminance at a time point of a refresh rate change is reduced, thereby preventing viewers from perceiving the change of the refresh rate.
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