Lg Display Co., Ltd.

Inha-industry Partnership Institute

Sunkyung Shin

Beom-Jin Kim

Bongchoon Kwak

Sojung Jung

JinBong Chung

Kyungjin Jang

UnSang Yu

Kyungsup Kwak

HyongHwan Kim

TaeKyung Sung

SangKyoon Nam

Kwangdug Choi

HyeonSik Kim

A touch driving circuit and a touch display device are disclosed. A group sensing control switch connected between lines connected to sensing units included in a touch driving circuit is disposed, thereby providing a structure in which one sensing unit can drive a touch electrode driven by another sensing unit. One sensing unit simultaneously drives two or more touch electrodes according to an operation state of a group sensing control switch to perform touch sensing, thereby providing a touch driving circuit and a touch display device capable of maintaining the resolution of touch sensing and improving touch sensitivity according to a driving environment.

Touch driving circuit and touch display device having group sensing control switch

A display panel sets a focus area per frame, based on focus area setting information and focus area reference line information received from the outside, control the number of gate lines simultaneously driven according to the focus area, and display a rendered image per focus area, thereby preventing the quality degradation of the image perceived by the user and increasing the frame rate of the display panel, and enhancing the quality of the virtual reality experience provided by the virtual reality device.

Display device and virtual reality device

A gate driver, a data driver, and a display apparatus including the gate driver and the data driver, may enable a resolution of each region of a display panel to be changed. The gate driver may include a gate resolution control signal output device outputting gate resolution control signals; a gate pulse generating device generating gate pulses to be output to gate lines; and a gate line selection device selecting gate lines, to which the gate pulses output from the gate pulse generating device are to be transferred, on the basis of the gate resolution control signals. The gate pulse generating device includes gate stages generating the gate pulses. The gate line selection device includes gate serial switches; and gate parallel switches. The gate serial switches respectively connect the gate stages to the gate lines, and each of the gate parallel switches connects two adjacent gate lines.

Virtual reality (VR) gate driver changing resolution of display panel based on changing eye focus position

The embodiments of the present disclosure relate to a display device, a test circuit, and a test method thereof. More specifically, a display device may include a silicon substrate having a plurality of gate lines, a plurality of data lines, a plurality of sensing lines, and a pixel array on which a plurality of subpixels are arranged; a test circuit arranged on the silicon substrate, the test circuit configured to select at least one line of the plurality of data lines or the plurality of sensing lines, to convert a signal transmitted through the selected line into a digital signal, and to output test data; and a test pad unit configured to output the test data to a circuit outside the silicon substrate.

Display device, test circuit, and test method thereof

A display device and a method of controlling the display device are discussed. The display device includes a first display configured to display a first line at a first time and configured to display a second line at a second time at a position spaced a predetermined distance apart from the position at which the first line is displayed, a second display configured to display the second line at the first time and configured to display the first line at the second time, a first driver IC configured to drive the first display, a second driver IC configured to drive the second display, and a controller configured to transmit, to the first driver IC, information on the first line at the first time and information on the second line at the second time and configured to supply, to the second driver IC, information on the second line at the first time and information on the first line at the second time.

Display device and control method for the same

A method and a circuit for driving a touch sensor measuring noise and a display device using the same are disclosed. The method of driving the touch sensor includes connecting sensor lines of a plurality of touch sensors to a sensing unit during a noise measurement portion, and driving the sensing unit at previously selected noise measurement frequencies in a state where the sensor lines are connected to the sensing unit or applying a signal of the noise measurement frequencies to the sensor lines to measure a noise of the touch sensors at each of the noise measurement frequencies.

Method and circuit for driving touch sensor and display device using the same

An electronic device with a touch sensor comprises: a touch screen including touch sensors defined by Tx lines and Rx lines; a touch sensing circuit that supplies a drive signal to the Tx lines and senses a voltage change in the touch sensors to output sensing data; and a noise filtering unit that profiles the type of noise in the sensing data and compensates the sensing data so that the sensing data is near the maximum threshold or the minimum threshold, which is calculated based on a average value of the previous frame, or within the range between the maximum and minimum thresholds.

Electronic device with touch sensor and driving method thereof

Provided is a method of compensating reference data, including calculating touch compensation data in the n-th frame period by compensating touch raw data in the n-th frame period using the reference data in the (n&#x2212;1)-th frame period that is stored in a memory, detecting touch candidate coordinates by analyzing the touch compensation data in the n-th frame period, generating reference compensation data in the n-th frame period by setting up a labeling block from the touch raw data corresponding to the touch candidate coordinates and by compensating the touch raw data included in the labeling block, not the touch raw data not included, and generating reference data in the n-th frame period by calculating an average value of the reference compensation data in the n-th frame period, and the reference compensation data in the (n&#x2212;k)-th to (n&#x2212;1)-th frame periods, stored in the memory.

Method of compensating reference data and touch screen apparatus using the method

The present invention relates, in general, to a joint channel and frequency offset estimation apparatus and method based on a multi-band-orthogonal frequency division multiplexing system, and, more particularly, to a joint channel and frequency offset estimation apparatus and method based on an MB-OFDM system, which uses low-rank LMMSE channel estimation, in which a low-rank is applied to the MB-OFDM system, thus decreasing complexity, and adds a simple structure using the autocorrelation characteristics of an estimated channel, thus joining channel estimation to frequency offset estimation at low complexity. The apparatus includes a channel estimator for receiving a Fourier-transformed OFDM signal, and calculating results of channel estimation using a Linear Minimum Mean Square Error (LMMSE) channel estimation, which minimizes a Mean Square Error (MSE) between an actual channel value and an estimated channel value. An autocorrelation unit calculates an autocorrelation value using the results, which are calculated through the channel estimator, in which a frequency offset is considered. A frequency offset estimator calculates a frequency offset, having a maximum value calculated by the autocorrelation unit, and estimating an actual frequency offset.

Growing community of inventors

Gyeonggi-do, South Korea

Sunkyung Shin