Samsung Display Co., Ltd.

Samsung Displayco., Ltd.

Il Ho Lee

Jin Woo Park

Seongmo Hwang

Jinwoo Park

Young-Jin Kim

Taejoon Kim

Seung-Hee Lee

Seungrok Lee

Seong Mo Hwang

Seoung Bum Pyoun

Wankee Jun

Tae Joon Kim

Jung Mok Park

Min Hong Kim

Yerin Oh

Seung Ho Nam

Jaejin Pyun

In Cheol Kim

Wan Kee Jun

Hyun Wook Cho

Moon Jung Baek

Hyun-Ju Lee

Seungho Nam

Moonjung Baek

Incheol Kim

Jihong Park

Sang Min Jeon

Hyeon Yong Jang

Soo Won Kim

Seung Rok Lee

Moonsung Choi

Jae Jin Pyun

Byoung Won Choi

Jihoon Kim

Taehyung Kim

Junghyun Cho

Jung-Hyun Cho

Tae Yong Kim

Jungmok Park

Jae Woo Choi

Hyung Chul Kim

Sanghun Park

Sang Hun Park

Hyun-wook Cho

Moongyu Lee

Yoon Gu Kim

Hyung Bae Kim

Yong-Hwi Kim

Yoongu Kim

Yoon Gyu Lee

Yongsub So

Ki Seok Cha

Eun Chul Shin

Sanghyuk Kwon

Sang Min Choi

Hyeonyong Jang

Bogeun Yuk

Chan Wook Shim

Ye Rin Oh

Eunchul Shin

Cheol Gon Choi

Hyeonseo Cho

Hyeon Seo Cho

Yeongbin Kim

Sangmin Choi

Chansik Noh

Wan Bae Park

A display device includes a touch sensor including a touch panel and a touch controller, and a crystal unit connected to the touch controller. The touch controller includes a plurality of sensing channels connected to the touch panel, and a feedback circuit. The crystal unit is connected to at least one of the sensing channels in a first mode, and is connected to the feedback circuit in a second mode.

Display device and inspecting method thereof

A driving circuit includes: a display driver configured to generate a vertical synchronization signal; and a sensor driver configured to determine a driving frequency by using the vertical synchronization signal, wherein a pulse polarity of the vertical synchronization signal is inverted when the driving frequency is changed.

Driving circuit, display device including the driving circuit, and method of driving the same

An electronic device testing method includes providing an electronic device including a display layer including a common electrode and a sensor layer that is disposed on the display layer and that includes a plurality of first electrodes and a plurality of second electrodes that insulatively intersect the plurality of first electrodes, measuring a plurality of jitter values of a plurality of channels formed by the plurality of first electrodes and the plurality of second electrodes, calculating a first value being an average of the plurality of jitter values, calculating a second value by summing jitter values, among the plurality of jitter values, of channels formed by one of the plurality of second electrodes among the plurality of channels, and testing the common electrode based on a third value obtained by dividing the second value by the first value.

Electronic device testing method

An inspection system includes a display device product comprising a display panel and an input sensor; and an inspection device comprising an inspection signal generator configured to provide to the display panel an inspection signal indicative of a first image pattern, a memory configured to store a reference signal responsive to a second image pattern, and a noise detector configured to receive from the input sensor a sensing signal responsive to the first image pattern, detect a first noise based on the sensing signal, and detect a second noise based on the reference signal.

System and method for inspecting display device having input sensor

A driving method of a touch sensing part includes sensing a touch of a user by comparing a capacitance formed by a first sensing electrode and a second sensing electrode crossing the first sensing electrode with a reference value in a reference touch mode, varying the reference value such that the reference value decreases along a decrease in the capacitance, during a first period, when an ambient temperature is lower than a reference temperature, sensing the user's touch by comparing the reference value and the capacitance, with the reference value maintained uniformly, during a second period following the first period, when the touch of the user is made, and varying the reference value such that the reference value decreases, during a third period following the second period.

Touch sensing part and driving method thereof

An electronic device including: a display layer; a sensor layer disposed on the display layer; a memory configured to store first sensitivity values and first differential sensitivity values; and a sensor driver configured to calculate second sensitivity values from a plurality of nodes and to calculate second differential sensitivity values, wherein the sensor driver is configured to: calculate difference values between the first differential sensitivity values and the second differential sensitivity values; calculate a first average value of a first row or column of values among the difference values; and calculate a second average value of remaining values among the difference values, wherein the remaining values were not used in the first average value calculation, and wherein the sensor driver determines whether to update a baseline, based on the first average value and the second average value.

Electronic device, a sensor driving unit, and an electronic device driving method

A touch test device for a display device, includes a loading unit receiving a display device. The display device includes a touch sensing unit having driving electrodes and sensing electrodes. A touch driving circuit driving the driving electrodes and the sensing electrodes and detecting touch signal data for the driving electrodes, sensing signal data for the sensing electrodes, and touch data of touch nodes positioned at intersections between the driving electrodes and the sensing electrodes. A test processing circuit calculates parameter values inversely proportional to resistance deviations of the driving electrodes and the sensing electrodes, performs an arithmetic operation on the parameter values and the touch data of the touch nodes to provide corrected touch data, and detects defects in the driving electrodes and the sensing electrodes according to a result of comparing and analyzing the corrected touch data.

Touch test device and method for display device

A display device includes a display unit including pixels. A sensor unit overlaps with the display unit and includes sensors. A sensor driver transmits a driving signal to the sensors, and receives sensing signals corresponding to the driving signal from the sensors. One sensing period includes a first sensing period and a second sensing period. The sensor driver transmits a first driving signal having a first frequency to the sensors in the first sensing period, and transmits a second driving signal having a second frequency different from the first frequency to the sensors in the second sensing period.

Input sensing device and display device including the same

A touch detection module, includes: a plurality of driving electrodes arranged side by side; a plurality of sensing electrodes staggered with respect to the driving electrodes; and a touch driving circuit configured to supply touch driving signals to the plurality of driving electrodes and to detect touch detection signals through the plurality of sensing electrodes to identify touch position coordinates, wherein the touch driving circuit is configured: to vary frequency modulation parameter set values in response to a change in a frequency of reference clocks, and to generate and supply a frequency of the touch driving signals by using the reference clocks and a varied frequency modulation parameter set value.

Touch detection module and display device including the same

A display device including: a display panel configured to display an image in units of a frame; an input sensor disposed on the display panel, and configured to sense an external input; a panel driver configured to control driving of the display panel in response to a synchronization signal; and a sensor controller configured to control driving of the input sensor, wherein the sensor controller receives the synchronization signal from the panel driver and outputs a plurality of transmission signals to the input sensor, and the plurality of transmission signals are varyingly generated based on the synchronization signal.

Display device in which transmission signals are varyingly generated based on a synchronization signal

A display device including: pixels; a data driver configured to start outputting data voltages to at least some of the pixels at a first time during a horizontal period, and end outputting the data voltages at a second time during the horizontal period; sensors; and a sensor driver configured to change a logic level of a sensing signal of at least some of the sensors at a third time different from the first time and the second time during the horizontal period, wherein at least one of the first time, the second time, and the third time is changed according to a number of times a logic level of a vertical synchronization signal is changed while a logic level of a horizontal synchronization signal is maintained.

Display device and a driving method thereof

A touch screen panel including a substrate having an effective area and a pad area, sensing electrodes disposed in the effective area, pads disposed in the pad area, wirings connecting the sensing electrodes and the pads, respectively, the wirings each having different lengths, and an electrostatic dispersion pad disposed adjacent to a sensing electrode disposed closest to the pad area among the sensing electrodes.

Touch screen panel having wiring including extension

A display device includes a display panel configured to display an image, an input sensor disposed on the display panel to sense an input and including a first area and a second area, and a sensor controller connected to the input sensor. The input sensor includes first sensing electrodes disposed in the first area, second sensing electrodes disposed in the second area, and a boundary sensing electrode disposed to overlap a boundary between the first and second areas. The boundary sensing electrode forms a mutual capacitor with one or more of the first sensing electrodes that are adjacent to the boundary sensing electrode, and forms a mutual capacitor with one or more of the second sensing electrodes that are adjacent to the boundary sensing electrode.

Display device and method of driving the same

A display device includes a display panel including pixels, an active area on which an image is configured to be displayed, and a black matrix area on which an image is not configured to be displayed, touch sensor electrodes configured to detect a touch of an external object, the touch sensor electrodes disposed in the active area, and detection input electrodes configured to generate mutual capacitance with the touch sensor electrodes, the detection input electrodes disposed in an edge area of the display panel that overlaps the black matrix area.

Display device including touch sensor

A testing device for testing a display module may include touch test pads electrically connected to touch pads of a display module, a first power test pad and a second power test pad electrically connected to a first power pad and a second power pad of the display module, a voltage generator providing a first test power voltage and a second power test voltage to the first power test pad and second power test pad, and a capacitance measurement circuit measuring capacitance between the first power test pad and second power test pad.

Testing device of display module, testing system including the same, and testing method using the same

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Hwaseong-si, South Korea

Il Ho Lee