公开(公告)号：US09965109B2

公开(公告)日：2018-05-08

申请号：US14291283

申请日：2014-05-30

Applicant: LG Display Co., Ltd.

Inventor： Hyeongwon Kang ,  Beomjin Kim

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: A touch screen driver includes a touch screen comprising Tx channels, Rx channels crossing the Tx channels, and sensor nodes formed at the crossings of the Tx channels and the Rx channels; a Tx driving circuit for supplying a Tx driving pulse to the Tx channels; an Rx driving circuit comprising an offset charge compensation circuit that equally compensates for the amount of offset charge included in the voltages of the sensor nodes supplied through the Rx channels and a sampling circuit that samples the offset-compensated voltages of the sensor nodes in response to an Rx sampling clock and converts the sampled voltages into digital data; and a touch controller that analyzes the digital data input from the Rx driving circuit by a preset touch recognition algorithm and outputs touch data including coordinate information of a touch position.

公开(公告)号：US09569035B1

公开(公告)日：2017-02-14

申请号：US14981313

申请日：2015-12-28

Applicant: LG Display Co., Ltd.

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

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/0412 ,  G06F3/0416 ,  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.

Abstract translation: 这里公开了用于驱动触摸传感器的方法和电路以及使用其的显示装置。 驱动触摸传感器的方法包括将触摸传感器驱动信号提供给触摸传感器或放大器，并且在触摸输入感测部分期间感测触摸输入，并且在噪声测量期间测量通过触摸传感器接收的电流噪声而不用触摸传感器驱动信号 一部分。

公开(公告)号：US20150062080A1

公开(公告)日：2015-03-05

申请号：US14473144

申请日：2014-08-29

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyeongwon Kang

IPC: G09G5/18 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: A touch screen driving device includes a touch screen including adjacent first and second Tx channels, an Rx channel crossing the first and second Tx channels, a first sensor capacitor formed at a crossing of the first Tx channel and the Rx channel, and a second sensor capacitor formed at a crossing of the second Tx channel and the Rx channel, a Tx driving circuit which supplies a Tx driving signal of a first phase to the first Tx channel and supplies a Tx driving signal of a second phase, which is in antiphase of the first phase, to the second Tx channel, and an integrator which receives a voltage difference between a first voltage of the first sensor capacitor and a second voltage of the second sensor capacitor through the Rx channel and accumulate the received voltage difference several times.

Abstract translation: 触摸屏驱动装置包括包括相邻的第一和第二Tx通道的触摸屏，与第一和第二Tx通道交叉的Rx通道，形成在第一Tx通道和Rx通道的交叉处的第一传感器电容器和第二传感器 形成在第二Tx通道和Rx通道的交叉处的电容器; Tx驱动电路，其向第一Tx通道提供第一相位的Tx驱动信号，并提供第二相位的Tx驱动信号，该第二相位的反相 第一相到第二Tx通道，以及积分器，其通过Rx通道接收第一传感器电容器的第一电压和第二传感器电容器的第二电压之间的电压差，并且将接收的电压差累积多次。

公开(公告)号：US20140168148A1

公开(公告)日：2014-06-19

申请号：US14096013

申请日：2013-12-04

Applicant: LG Display Co., Ltd.

Inventor： Hyeongwon Kang ,  Beomjin Kim

IPC: G06F3/044

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。

公开(公告)号：US09405416B2

公开(公告)日：2016-08-02

申请号：US14495163

申请日：2014-09-24

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyeongwon Kang

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

CPC classification number: G06F3/044 ,  G06F3/0418

Abstract: A touch screen driving device includes a touch screen including Tx channels, Rx channels, and sensor nodes formed at crossings of the Tx channels and the Rx channels, a Tx driving circuit supplying a Tx driving pulse to the Tx channels, sensing units sampling voltages of the sensor nodes supplied through the Rx channels, a multiplexer (mux) array including mux switches, each of which is cross-coupled with output terminals of the sensing units adjacent to each mux switch, an analog-to-digital converter converting an analog sampling signal received from the mux array into digital data, an average unit which averages the digital data and removes noise included in the digital data, and a touch controller which analyzes the digital data, in which the noise is removed, using a touch recognition algorithm and outputs touch data including coordinate information of a touch position.

Abstract translation: 触摸屏驱动装置包括触摸屏，其包括Tx通道，Rx通道和在Tx通道和Rx通道的交叉处形成的传感器节点，Tx驱动电路向Tx通道提供Tx驱动脉冲，感测单元的采样电压 通过Rx通道提供的传感器节点，包括多路复用器（多路复用器）阵列的多路复用器（多路复用器）阵列，每个复用器（多路复用器）阵列与每个复用器开关相邻的感测单元的输出端交叉耦合，转换模拟采样 将从多路复用器阵列接收的信号转换成数字数据，平均数字数据平均值并消除包含在数字数据中的噪声;以及触摸控制器，其使用触摸识别算法分析噪声被去除的数字数据， 输出包括触摸位置的坐标信息的触摸数据。

公开(公告)号：US09134824B2

公开(公告)日：2015-09-15

申请号：US13728636

申请日：2012-12-27

Applicant: LG Display Co., Ltd.

Inventor： Hyeongwon Kang ,  Jaehun Jun

IPC: G06F3/041 ,  G06F3/0354 ,  G06F3/044

CPC classification number: G06F3/03547 ,  G06F3/0412 ,  G06F3/0418 ,  G06F3/044

Abstract: A touch sensing device includes a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed at crossings of the Tx lines and the Rx lines, a Tx driving circuit for supplying a driving signal to each of the Tx lines N times, where N is a positive integer equal to or greater than 2, and an Rx driving circuit for double sampling signals received through the Rx lines in one period of the driving signal. The Rx driving circuit includes a multiplexer which receives first and second signals and switches on or off a signal transmission path of the first and second signals, and an integrator which samples and integrates the first and second signals received from the multiplexer.

Abstract translation: 触摸感测装置包括触摸屏，包括Tx线，与Tx线交叉的Rx线和在Tx线和Rx线的交叉处形成的触摸传感器，用于向每个Tx线N提供驱动信号的Tx驱动电路 时间，其中N是等于或大于2的正整数;以及Rx驱动电路，用于在驱动信号的一个周期中通过Rx线接收的双采样信号。 Rx驱动电路包括多路复用器，其接收第一和第二信号并且接通或关闭第一和第二信号的信号传输路径，以及积分器，其对从多路复用器接收的第一和第二信号进行采样和积分。

公开(公告)号：US20140354592A1

公开(公告)日：2014-12-04

申请号：US14291283

申请日：2014-05-30

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyeongwon Kang ,  Beomjin Kim

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: A touch screen driver includes a touch screen comprising Tx channels, Rx channels crossing the Tx channels, and sensor nodes formed at the crossings of the Tx channels and the Rx channels; a Tx driving circuit for supplying a Tx driving pulse to the Tx channels; an Rx driving circuit comprising an offset charge compensation circuit that equally compensates for the amount of offset charge included in the voltages of the sensor nodes supplied through the Rx channels and a sampling circuit that samples the offset-compensated voltages of the sensor nodes in response to an Rx sampling clock and converts the sampled voltages into digital data; and a touch controller that analyzes the digital data input from the Rx driving circuit by a preset touch recognition algorithm and outputs touch data including coordinate information of a touch position.

Abstract translation: 触摸屏驱动器包括触摸屏，其包括Tx信道，穿过Tx信道的Rx信道和形成在Tx信道和Rx信道的交叉点处的传感器节点; Tx驱动电路，用于向Tx信道提供Tx驱动脉冲; Rx驱动电路，其包括偏移电荷补偿电路，其补偿包括在通过Rx通道提供的传感器节点的电压中的偏移电荷的量;以及采样电路，其对响应于传感器节点的偏移补偿电压进行采样 Rx采样时钟，并将采样电压转换成数字数据; 以及触摸控制器，其通过预设的触摸识别算法分析从Rx驱动电路输入的数字数据，并输出包括触摸位置的坐标信息的触摸数据。

公开(公告)号：US09891762B2

公开(公告)日：2018-02-13

申请号：US14473163

申请日：2014-08-29

Applicant: LG DISPLAY CO., LTD.

Inventor： Sangyong Lee ,  Hyeongwon Kang

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0412 ,  G06F3/0418

Abstract: A touch screen device includes a touch screen panel including Tx lines, Rx lines, and touch sensors formed at crossings of the Tx lines and Rx lines; a Tx driving circuit for supplying a driving pulse to the Tx lines; and an Rx driving circuit for sampling charge variations of the touch sensors, which are received through the Rx lines, and converting the received charge variations into touch raw data, wherein the Rx driving circuit includes: a noise filter that removes noise of signals received from the Rx line; an integrator that accumulates the charge variations passing through the noise filter; a sampling circuit that samples the accumulated charge variation of the integrator; and an analog to digital converter that converts the charge variation sampled by the sampling circuit into the touch raw data, the noise filter being a biquad bandpass filter including variable resistors and variable capacitors.

公开(公告)号：US20130249825A1

公开(公告)日：2013-09-26

申请号：US13728636

申请日：2012-12-27

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyeongwon Kang ,  Jaehun Jun

IPC: G06F3/0354

CPC classification number: G06F3/03547 ,  G06F3/0412 ,  G06F3/0418 ,  G06F3/044

Abstract: A touch sensing device includes a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed at crossings of the Tx lines and the Rx lines, a Tx driving circuit for supplying a driving signal to each of the Tx lines N times, where N is a positive integer equal to or greater than 2, and an Rx driving circuit for double sampling signals received through the Rx lines in one period of the driving signal. The Rx driving circuit includes a multiplexer which receives first and second signals and switches on or off a signal transmission path of the first and second signals, and an integrator which samples and integrates the first and second signals received from the multiplexer.

Abstract translation: 触摸感测装置包括触摸屏，包括Tx线，与Tx线交叉的Rx线和在Tx线和Rx线的交叉处形成的触摸传感器，用于向每个Tx线N提供驱动信号的Tx驱动电路 时间，其中N是等于或大于2的正整数;以及Rx驱动电路，用于在驱动信号的一个周期中通过Rx线接收的双采样信号。 Rx驱动电路包括多路复用器，其接收第一和第二信号并且接通或关闭第一和第二信号的信号传输路径，以及积分器，其对从多路复用器接收的第一和第二信号进行采样和积分。

公开(公告)号：US20130141372A1

公开(公告)日：2013-06-06

申请号：US13689184

申请日：2012-11-29

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyeongwon Kang

IPC: 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。