Lg Display Co., Ltd.

Sanghyuck Bae

SungChul Kim

Sungsu Han

Suyun Ju

HyungUk Jang

DoYoung Jung

CheolSe Kim

Yangsik Lee

Jinseong Kim

JuHan Kim

Sungchul Kim

Deuksu Lee

Seongkyu Kang

Jaeseung Kim

Juhan Kim

Hyunsuk Cho

Seungrok Shin

Hyunwoo Jang

Cheolse Kim

Hyunguk Jang

Buyeol Lee

Younggyu Kim

Seungseok Oh

Doyoung Jung

A touch display device can include first and second touch electrodes spaced apart from each other, a first touch line to which a first touch driving signal is applied, a first touch driving transistor configured to control a connection between the first touch electrode and the first touch line, and a second touch driving transistor configured to control a connection between the second touch electrode and the first touch line. As the first touch driving transistor is turned on, a first touch driving signal can be supplied to the first touch electrode through the first touch line, and as the second touch driving transistor is turned on, the first touch driving signal can be supplied to the second touch electrode through the first touch line.

Touch display device

A touch sensing system is disclosed. The touch sensing system includes an active stylus pen that generates a first pen driving signal for detecting a touch input in synchronization with a touch driving signal input from a touch screen and a second pen driving signal for detecting an additional input related to an additional function of the active stylus pen in a touch driving period and outputs the first and second pen driving signals to the touch screen; and a touch driving device that applies the touch driving signal to the touch screen, senses the first pen driving signal in a first period of the touch driving period, and senses the second pen driving signal in a second period of the touch driving period.

Touch sensing system including active stylus pen

An active stylus pen according to the present invention includes a first signal processor configured to generate a touch frame recognition signal for discriminating touch frames on the basis of sub-pulses corresponding to part of each touchscreen driving signal received from a touchscreen and a second signal processor configured to generate a pen driving signal synchronized with main pulses of each touchscreen driving signal other than the sub-pulses and to vary the pen driving signal in units of a touch frame according to the touch frame recognition signal such that additional pen information is reflected in the pen driving signal.

Active stylus pen, touch sensing system and driving method thereof

A touch sensing system comprises a touchscreen with a plurality of touch electrodes, to which a touchscreen driving signal is applied, and a stylus pen that generates a pen driving signal based on the touchscreen driving signal and sends the same to the touchscreen. The stylus pen comprises: an amplifier that amplifies the touchscreen driving signal to generate an amplified signal; a comparator that compares the amplified signal with a preset reference voltage to generate a comparator output signal; and a signal processor that measures the pulse width of the comparator output signal, adjusts an amount of delay based on a measurement, and determines an output timing of the pen driving signal based on an adjusted amount of delay to synchronize the pen driving signal with the touchscreen driving signal.

Stylus pen and touch sensing system and driving method of the same

A liquid crystal display (LCD) device includes a lower substrate and an upper substrate disposed to face each other and having a liquid crystal layer interposed therebetween, black matrices provided on the lower substrate, a color filter provided between the black matrices, and a common electrode provided on the entire surface of the lower substrate, a gate line and a data line provided on the upper substrate and intersect with each other to define a pixel area, a thin film transistor (TFT) present in the pixel area of the upper substrate, and a pixel electrode electrically in contact with the TFT, wherein a sensing signal is output by detecting a change in self-capacitance between a touch object contacting the upper substrate and the gate line and the data line.

Liquid crystal display device using in-cell touch mode and method for manufacturing the same

Growing community of inventors

Gyeonggi-do, South Korea

Sanghyuck Bae