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

IPC: G06F3/041 ,  G09G3/22 ,  H03M1/12 ,  G06F3/044 ,  G09G3/20

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：US10860134B2

公开(公告)日：2020-12-08

申请号：US16655824

申请日：2019-10-17

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo Chung ,  Joohee Lee

IPC: G06F3/042 ,  G06F3/041 ,  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：US10417980B2

公开(公告)日：2019-09-17

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：US11056055B2

公开(公告)日：2021-07-06

申请号：US16522497

申请日：2019-07-25

Applicant: LG Display Co., Ltd.

Inventor： Moonsoo Chung ,  Joohee Lee

IPC: G09G3/3233 ,  G06F3/041 ,  G06F3/042 ,  G09G3/3266 ,  G09G3/3275 ,  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：US10565940B2

公开(公告)日：2020-02-18

申请号：US15842775

申请日：2017-12-14

Applicant: LG DISPLAY CO., LTD.

Inventor： Joohee Lee ,  Moonsoo Chung

IPC: G06F3/038 ,  G09G5/00 ,  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.