公开(公告)号：US20180096662A1

公开(公告)日：2018-04-05

申请号：US15716128

申请日：2017-09-26

Applicant: LG Display Co., Ltd.

Inventor： Joohee LEE ,  Yongwon JO

IPC: G09G3/36

Abstract: A liquid-crystal display device and a driving method thereof are disclosed. The driving method of the liquid-crystal display device comprises: converting data of an input image into a positive gamma reference level voltage and a negative gamma reference voltage to generate a positive data voltage and a negative data voltage; selecting between the positive data voltage and the negative data voltage in response to a polarity control signal and supplying the selected data voltage to data lines; generating a compensated voltage based on the difference between a dummy data voltage and a preset gamma reference level voltage; and increasing the high-potential power supply voltage by an amount equal to the compensated voltage and decreasing the low-potential power-supply voltage by the amount equal to the compensated voltage.

公开(公告)号：US20190155431A1

公开(公告)日：2019-05-23

申请号：US16192588

申请日：2018-11-15

Applicant: LG Display Co., Ltd.

Inventor： Joohee LEE ,  Moonsoo CHUNG ,  Yonghwa PARK

IPC: G06F3/041 ,  H03M1/12 ,  G09G3/22

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.

公开(公告)号：US20190080652A1

公开(公告)日：2019-03-14

申请号：US16110407

申请日：2018-08-23

Applicant: LG Display Co., Ltd.

Inventor： Kyujin KIM ,  Joohee LEE ,  Taehun KIM

IPC: G09G3/3291

Abstract: An organic light emitting display device using a multiplexer includes a display panel, a data driver, and a multiplexer. The display panel includes first to fourth data lines and first to fourth pixels respectively connected to the first to fourth data lines. The data driver includes a first output buffer supplying a data voltage to the first and third data lines and a second output buffer supplying a data voltage to the second and fourth data lines. The multiplexer distributes the data voltage from the first output buffer to the first and third data lines in a time division manner and distributes the data voltage from the second output buffer to the second and fourth data lines in a time division manner. The multiplexer connects a data line, which is not connected to the first and second output buffers, among the first to fourth data lines, to an initialization voltage line providing an initialization voltage.

公开(公告)号：US20200159385A1

公开(公告)日：2020-05-21

申请号：US16655824

申请日：2019-10-17

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo CHUNG ,  Joohee LEE

IPC: G06F3/041 ,  G06F3/042 ,  G09G3/20

Abstract: The display device of the present disclosure may comprise a display panel equipped with pixels each representing image data and photo sensors each outputting an electric signal through a sensing line responding to light, a data driving circuit providing a data voltage corresponding to the image data to the pixel through a data line, a gate driving circuit supplying, through a gate line, a scan signal for controlling an application of the data voltage to the pixel disposed on a horizontal line and for controlling a connection of the photo sensor disposed on a corresponding horizontal line and the sensing line, a sensing driving circuit outputting digital sensing data by summing the electric signals of two photo sensors disposed on different horizontal lines and sharing the sensing line; and a timing controller supplying control signals for controlling the data driving circuit, the gate driving circuit and the sensing driving circuit.

公开(公告)号：US20200051499A1

公开(公告)日：2020-02-13

申请号：US16522497

申请日：2019-07-25

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo Chung ,  Joohee LEE

IPC: G09G3/3233 ,  G09G3/3275 ,  G09G3/3266 ,  G09G5/377

Abstract: The display device according to the present disclosure may comprise a display panel equipped with a plurality of pixels and a plurality of photo sensors, a data driving circuit, a gate driving circuit, and a timing controller. The source drive IC included in the data driving circuit may comprise a DAC, one or more sensing units to receive an electrical signal from the photo sensor in a display period and to receive a sensing signal from the pixel in a blank period, and an ADC to convert the signal output from the sensing unit into digital data.

公开(公告)号：US20190012967A1

公开(公告)日：2019-01-10

申请号：US15842775

申请日：2017-12-14

Applicant: LG DISPLAY CO., LTD.

Inventor： Joohee LEE ,  Moonsoo CHUNG

IPC: G09G3/34 ,  G09G3/36

Abstract: Disclosed is a display device having a plurality of gate lines, a plurality of pixels connected with the plurality of gate lines and an optical sensor connected with a k-th gate line among the plurality of gate lines. A gate pulse applied to the k-th gate line includes a sensing gate pulse applied during a (k−i)-th horizontal period and a pixel driving gate pulse applied during a k-th horizontal period. The optical sensor connected with the k-th gate line outputs a sensing voltage in response to the sensing gate pulse. The pixel connected with the k-th gate line is applied with a data voltage in response to the pixel driving gate pulse.