Samsung Display Co., Ltd.

Korea Advanced Institute of Science and Technology

Samsung Electro-mechanics Co., Ltd.

Korea University Research and Business Foundation

Samsung Electronics Co., Ltd.

Oh Jo Kwon

Kyung Youl Min

Ji Woong Kim

Sang Hyun Heo

Hyung Gun Ma

Choong Sun Shin

Won Tae Choi

Hyun Sik Kim

Seong Joo Lee

Chang Hyun Kim

Bong Hyun You

Joo Hyung Lee

Gyu Hyeong Cho

Joon Chul Goh

Jun Suk Bang

Keum Dong Jung

Jun Yong Song

Jin Yong Kang

Hee Sun Ahn

Ha Woong Jeong

Han Chul Jo

Dong Soo Kim

Bong-Hyun You

Jaekeun Lim

Jung Hun Yi

Hyungryul Kang

Gyeong Gu Kang

Seok Tae Koh

Seung Hun Choi

Yoshimura Hideo

Joon-Chul Goh

Hyo Jin Lee

Jeong Min Kim

Jae Keun Lim

Se Hyuk Park

Seok Ha Hong

Kyung Tea Park

Dong Won Lee

Bo Yeon Kim

Jeongmin Kim

Hyung Min Lee

Hyung-Min Lee

Sung Hoon Bang

Young Soo Hwang

Jiwoong Kim

Sang Jae Yeo

Young-Soo Hwang

Yun Ki Baek

Ki-Duk Kim

Kyoung Soo Kwon

JunYong Song

Jeon Kyoo Kim

Jeong Hwan Shin

Ki Duk Kim

Young Uk Won

Gyu Wan Lim

Seong An Park

According to embodiments of the disclosure, a pixel includes a driving transistor including a gate electrode, a first electrode electrically connected to a first power line and a second electrode electrically connected to a light emitting element, a body of a semiconductive layer constituting the driving transistor being electrically connected to the first power line.

Pixel and display device including the same

A pixel may include: a first transistor including a second electrode, a first electrode electrically connected to a first power line, and a gate electrode connected to a first node; a second transistor including a second electrode, a first electrode electrically connected to a data line, and a gate electrode electrically connected to a first scan line; a third transistor connected between the first node and the data line, and including a gate electrode electrically connected to a second scan line; a first capacitor including a first electrode connected to the second electrode of the second transistor, and a second electrode connected to the first node; a second capacitor connected between the first power line and the first node; and a light emitting element between a second power line and the first transistor, and including a second electrode electrically connected to the second power line.

A sensor device including: first sensors; second sensors configured to form capacitances with the first sensors; a sensor transmitter connected to the first sensors and configured to supply driving signals having a first frequency to the first sensors; and a sensor receiver connected to the second sensors and configured to receive sensing signals from the second sensors, wherein the sensor receiver includes: a multipath filter having a center frequency set to the first frequency; and a first chopper integrator connected to the multipath filter, and having a center frequency set to the first frequency.

Sensor device and a method of driving the same

An input sensing unit includes a touch sensing unit, which includes a plurality of driving electrodes, a plurality of sensing electrodes, and a driving signal generating unit which provides driving signals to the driving electrodes. The sensing electrodes are insulated from and intersect the driving electrodes. The driving signal generating unit includes touch drivers connected to driving electrodes and a digital-to-analog converter configured to provide a first signal or a second signal, and each of the touch drivers is connected to a preset number of driving electrodes among the driving electrodes.

Input sensing unit and method of driving the same

A digital-analog converter of the disclosure converts digital image data to generate analog data signals. The digital-analog converter includes a voltage divider which generates a plurality of gamma reference voltages based on a first reference voltage and a second reference voltage; a global ramp including a plurality of gamma decoders which generates a plurality of global gamma voltages based on the gamma reference voltages; a decoder which selects one of the global gamma voltages according to the digital image data to generate the analog data signals; and a ramp controller which turns off at least some of the gamma decoders based on the digital image data.

Digital driving circuit, digital-analog converter having decoders with different turn on/off state, and display device thereof

A display device includes: a display panel including a plurality of pixels; a scan driver connected to the plurality of pixels through a plurality of scan lines; a data driver connected to the plurality of pixels through a plurality of data lines; an emission driver connected to the plurality of pixels through a plurality of emission control lines; a sensing circuit connected to the plurality of pixels through a plurality of sensing lines; and a controller configured to control the scan driver, the data driver, the emission driver and the sensing circuit, wherein, in an active period of each frame period, the scan driver sequentially applies a sensing pulse and a scan pulse to at least one scan line of the plurality of scan lines, and applies the scan pulse to remaining scan lines of the plurality of scan lines.

Display device configured to sequentially apply a sensing pulse and a scan pulse

An output buffer is disclosed that includes: a buffer circuit that outputs an output signal to an output terminal based on a first input signal provided to a first input terminal and a second input signal provided to a second input terminal; and a current supply circuit that is connected in parallel to the buffer circuit, and provides an auxiliary current to the output terminal based on the first input signal and the second input signal.

Output buffer, data driver, and display device having the same

A data driver includes a multi-channel sample/hold circuit electrically connected between a digital-to-analog converter and a data buffer. The multi-channel sample/hold circuit includes a first sample/hold circuit connected to a first channel and a second sample/hold circuit connected to a second channel. The first sample/hold circuit performs a first drive operation and a second drive operation. The first drive operation includes sampling a data voltage as a buffer input voltage and maintaining the buffer input voltage during an nhorizontal time. The second drive operation includes outputting the buffer input voltage to an output terminal of the buffer during an (n+1)horizontal time. The second sample/hold circuit performs the second drive operation during the nhorizontal time and performs the first drive operation during the (n+1)horizontal time.

Data driver with sample/hold circuit and display device including the same

A pixel according to some embodiments includes a light source unit, a first transistor coupled between a first power source and a first node, and configured to control a driving current applied to the light source unit, a first bias transistor coupled between a first bias power source and a gate electrode of the first transistor, and a second bias transistor coupled between a second bias power source and a second node that is electrically coupled to an anode of the light source unit, wherein the first bias transistor and the second bias transistor are configured to be turned on during a first period before a data voltage is applied among one frame, and wherein the second bias transistor is configured to be turned on at least once during a second period after the data voltage is applied among the one frame.

Pixel, display device, and method of driving display device

Digital-analog converter, data driving circuit having the same, and display device having the same

A data driver includes: a signal generator which includes a staircase waveform gray voltage signal generator which generate a plurality of staircase waveform gray voltage signals using a lowest gamma reference voltage, a highest gamma reference voltage, and a plurality of gamma voltages having a magnitude between the lowest gamma reference voltage and the highest gamma reference voltage; and a channel driver which includes a decoder which output one staircase waveform gray voltage signal selected from the staircase waveform gray voltage signals, an output circuit which output a gray voltage corresponding to the selected staircase waveform gray voltage signal, and a reset unit which supplies one of the gamma voltages to the output circuit as a reset voltage.

Data driver and display device including the same

A digital-to-analog converter ('DAC') converts digital image data into analog image signals. The DAC includes a stage outputting different voltages to a first output terminal and a second output terminal based on a voltage supplied to a first input terminal, a voltage supplied to a second input terminal, and a first input bit. The stage includes a switch circuit including switches that are alternately turned on by a control signal, and outputting an intermediate output voltage to a third output terminal based on a first input voltage supplied to the first input terminal and a second input voltage supplied to the second input terminal, and a selector outputting one of the first input voltage and the second input voltage, and the intermediate output voltage.

Digital-to-analog converter and driving circuit of display device including the same

A data driver includes a gamma voltage generator configured to generate gamma voltages based on a number of data bits of a pixel data; a first digital-to-analog block configured to generate a plurality of time-division gamma voltage signals respectively corresponding to a plurality of gamma voltage groups; a plurality of time-division gamma voltage line groups for transferring the plurality of time-division gamma voltage signals; a second digital-to-analog block configured to select a time-division gamma voltage signal among the time-division gamma voltage signals according to upper bits of the pixel data in each channel; a time-division gamma voltage select block configured to select a gamma voltage according to lower bits of the pixel data in each channel; and an output buffer block configured to output the selected gamma voltage in each channel.

Data driver and display device including a data driver

Display device performing a sensing operation with a sensing pulse

An organic light-emitting display includes: a display panel including first and second pixels, each having an organic light-emitting diode; and a data driver including a first operational amplifier having a non-inverting terminal coupled to a reference voltage terminal and an inverting terminal coupled to the first pixel, and a second operational amplifier having a non-inverting terminal coupled to the reference voltage terminal and an inverting terminal coupled to the second pixel. The first pixel includes a sensing transistor, a first driving transistor, and a first switch transistor. The second pixel includes a second driving transistor and a second switch transistor.

Organic light-emitting display having pixel with sensing transistor

Growing community of inventors

Yongin-si, South Korea

Oh Jo Kwon