公开(公告)号：US10198124B2

公开(公告)日：2019-02-05

申请号：US15393166

申请日：2016-12-28

Applicant: LG Display Co., Ltd.

Inventor： Dukhyo Lee ,  Jaehun Jun ,  Hyeongwon Kang ,  Beomjin Kim

IPC: G06F3/041 ,  G06F3/044

Abstract: Disclosed herein are a method and circuit for driving touch sensors and a display device using the same. A method of driving touch sensors includes supplying a touch sensor driving signal to the touch sensors or an amplifier and sensing a touch input during a touch input sensing portion and measuring current noise received through the touch sensors without the touch sensor driving signal during a noise measurement portion.

公开(公告)号：US09927936B2

公开(公告)日：2018-03-27

申请号：US15148217

申请日：2016-05-06

Applicant: LG Display Co., Ltd.

Inventor： Hyeongwon Kang ,  Beomjin Kim

IPC: G06F3/045 ,  G06F3/044 ,  G06F3/041 ,  G06F1/12

CPC classification number: G06F3/044 ,  G06F1/12 ,  G06F3/0416

Abstract: A touch screen driver includes a touch screen including Tx channels, Rx channels crossing the Tx channels, and sensor nodes formed at crossings of the Tx channels and the Rx channels, a Tx driving circuit supplying a driving pulse to the Tx channels, an Rx driving circuit which samples voltages of the sensor nodes supplied through the Rx channels in response to Rx sampling clocks and converts the sampled voltages into digital data, and a touch controller which modulates the Rx sampling clocks based on an RC delay deviation between the Rx channels, supplies the modulated Rx sampling clocks to the Rx driving circuit, differently controls sampling times of the Rx channels, and analyzes the digital data using a previously determined touch recognition algorithm.

公开(公告)号：US09904404B2

公开(公告)日：2018-02-27

申请号：US14875502

申请日：2015-10-05

Applicant: LG Display Co., Ltd.

Inventor： Hyeongwon Kang ,  Jaehun Jun ,  Dukhyo Lee ,  Beomjin Kim

IPC: G06F3/041 ,  G06F3/044 ,  G06F1/32

CPC classification number: G06F3/0416 ,  G06F1/3262 ,  G06F1/3265 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04112 ,  Y02D10/153

Abstract: A display device that comprises a plurality of touch electrodes and a touchscreen driving circuit coupled to the plurality of touch electrodes. In a normal display mode of the display device, the touchscreen driving circuit senses touch via the plurality of touch electrodes using self capacitance touch sensing. In a sleep mode of the display device, the touchscreen driving circuit senses touch via the plurality of touch electrodes using mutual capacitance touch sensing.

公开(公告)号：US09519364B2

公开(公告)日：2016-12-13

申请号：US13689184

申请日：2012-11-29

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyeongwon Kang

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/041 ,  G06F3/0416 ,  G06F3/044

Abstract: A touch screen sensing device includes a touch screen including touch sensors formed at crossings of Tx lines and Rx lines, a Tx driving circuit supplying a driving pulse to each of the Tx lines N times, and an Rx driving circuit which samples a signal voltage of the touch sensors received through the Rx lines and converts the sampled signal voltage into digital data. The Rx driving circuit includes a differential amplifier differentially amplifying signals received through the Rx lines, a low pass filter removing a radio frequency noise from an output of the differential amplifier, an amplifier amplifying an output of the low pass filter, and an integrator accumulating signal voltages which are successively output from the amplifier.

Abstract translation: 触摸屏感测装置包括触摸屏，其包括在Tx线和Rx线交叉处形成的触摸传感器，Tx驱动电路，其向每个Tx线N次提供驱动脉冲; Rx驱动电路，其对 触摸传感器通过Rx线接收并将采样的信号电压转换成数字数据。 Rx驱动电路包括差分放大器，差分放大通过Rx线接收的信号，低通滤波器从差分放大器的输出去除射频噪声，放大放大低通滤波器的输出的放大器和积分器累积信号 从放大器连续输出的电压。

公开(公告)号：US09348472B2

公开(公告)日：2016-05-24

申请号：US14096013

申请日：2013-12-04

Applicant: LG Display Co., Ltd.

Inventor： Hyeongwon Kang ,  Beomjin Kim

IPC: G06F3/045 ,  G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F1/12 ,  G06F3/0416

Abstract: A touch screen driver includes a touch screen including Tx channels, Rx channels crossing the Tx channels, and sensor nodes formed at crossings of the Tx channels and the Rx channels, a Tx driving circuit supplying a driving pulse to the Tx channels, an Rx driving circuit which samples voltages of the sensor nodes supplied through the Rx channels in response to Rx sampling clocks and converts the sampled voltages into digital data, and a touch controller which modulates the Rx sampling clocks based on an RC delay deviation between the Rx channels, supplies the modulated Rx sampling clocks to the Rx driving circuit, differently controls sampling times of the Rx channels, and analyzes the digital data using a previously determined touch recognition algorithm.

Abstract translation: 触摸屏驱动器包括触摸屏，包括Tx通道，穿过Tx通道的Rx通道，以及在Tx通道和Rx通道的交叉处形成的传感器节点，向Tx通道提供驱动脉冲的Tx驱动电路，Rx驱动 电路，其响应于Rx采样时钟采样通过Rx通道提供的传感器节点的电压，并将采样的电压转换成数字数据;以及触摸控制器，其基于Rx通道之间的RC延迟偏差来调制Rx采样时钟 对Rx驱动电路的调制Rx采样时钟不同地控制Rx通道的采样时间，并且使用先前确定的触摸识别算法分析数字数据。