Lg Display Co., Ltd.

Seungtae Kim

Bumsik Kim

KyoungDon Woo

Byungjae Lee

Minkyu Song

Sangho Yu

Chulwon Lee

Hyuckjun Kim

Myunggi Lim

MyungGi Lim

Woochan Kim

Oh Kyong Kwon

Hongseok Choi

Taegung Kim

Junghyeon Kim

SangHoon Lee

Byungchul Ahn

Joongsun Yoon

Seokhyun Hong

Dongik Kim

Taeyoung Lee

Jaeyoon Bae

Hanjin Bae

Kiwon Son

Hyemi Oh

Jisu Choi

Joonyoung Kim

YunSik Jeong

JinHyong Kim

A current sensing device and the organic light-emitting display device including the same are disclosed. The current sensing device may include a plurality of sensing units, each sensing unit playing a role of converting a pixel current input through a sensing line into a digital sensing value, and each sensing unit comprising: a current integrator including an integrating amplifier and a feedback capacitor, the integrating amplifier comprising an inverting input terminal, a non-inverting input terminal and an output terminal, wherein the feedback capacitor is connected between the inverting input terminal and the output terminal, and a first reference voltage is input to the non-inverting input terminal; and a current transmitting unit connected between the sensing line and the current integrator to separate the electric connection of the sensing line and the current integrator, wherein the current transmitting unit mirrors the pixel current and causes the mirrored current to be output from the inverting input terminal of the integrating amplifier.

Current sensing device and organic light emitting display device including the same

The current sensing device in the present disclosure comprises a plurality of sensing units each of which is connected to a sensing channel. The sensing unit may comprise a reference current generator generating a reference current; a current comparator outputting a comparator output signal based on a pixel current input through the sensing channel and the reference current, and removing an offset deviation component included in the pixel current and the reference current by using a reset current externally applied; and an edge triggered data flip-flop outputting a digital sensing value corresponding to the pixel current based on the comparator output signal.

A pixel sensing device, an organic light emitting display device and a pixel compensation method thereof are disclosed. The pixel sensing device comprises a plurality of current integrators for sensing driving characteristics of pixels. Each current integrator comprises: an operational amplifier equipped with an inverting input terminal to which a first input voltage is applied according to a pixel current of the pixels, a non-inverting input terminal to which a second input voltage is applied according to the pixel current, and an output terminal through which an integral voltage corresponding to the pixel current is output; and a feedback capacitor connected between the inverting input terminal and the output terminal. The operational amplifier comprises: a pre-amplifying unit for lowering an amplifier input gain and being equipped with the inverting and non-inverting input terminals; and two gain amplifying units for receiving an output of the pre-amplifying unit and for making an amplifier output gain higher than the amplifier input gain.

Pixel sensing device, organic light emitting display device, and pixel compensation method thereof

The present disclosure provides a rollable flexible display device. The rollable flexible display device including a display panel that displays an image and rolls or unrolls like a scroll, a sensing circuit that performs sensing to detect rolled and unrolled portions of the display panel and outputs sensed values, and a device adjusting part that adjusts the operating conditions of the display panel based on the sensed values sent from the sensing circuit.

Rollable flexible display device

The present disclosure provides a timing controller, a display device using the same, and a method of driving the display device. The display device includes a display panel displaying an image, at least two data drivers supplying a data signal to the display panel, at least two slave timing controllers that control the at least two data drivers, respectively, and supply the data signal to the at least two data drivers, respectively, and a master timing controller that controls the at least two slave timing controllers and that itself splits an externally supplied data signal and distributes the same to the at least two slave timing controllers.

Timing controller, display device using the same and method of driving the display device

A display device includes a display panel on which a plurality of pixels connected to data lines, reference lines, and gate lines are arranged, each pixel having an organic light emitting diode (OLED) and a driving thin film transistor (TFT); a data drive circuit to supply a data voltage to the data lines and a reference voltage to the reference lines; a gate drive circuit to generate a scan signal and a sensing signal and to supply the scan signal and the sensing signal to the gate lines, the scan signal being synchronized with the data voltage and the sensing signal being synchronized with the reference voltage; and a timing controller to divide one frame into a programming time, an emission time, and a non-emission time, and to control an emission duty by variably controlling the programming time based on an analysis of input image data.

Display device with duty control function and duty control method thereof

An organic light-emitting display comprises: a display panel with a plurality of pixels; a plurality of source driver ICs comprising sensing blocks that are connected to the pixels and sense the electrical characteristics of the pixels; and a calibration block that applies test currents to the sensing blocks in order to sense offset variations between the sensing blocks in a preset calibration mode. The calibration block comprises: a plurality of discrete current sources that generate the test currents; and a switch array that connects the source driver ICs and the discrete current sources, wherein two or more neighboring source driver ICs share one discrete current source, and each source driver IC is selectively connected to two or more discrete current sources.

Calibration device and method and organic light-emitting display including the same

A current sensing unit can include a current sink circuit connected to a sensing line, which reduces a pixel current fed via the sensing line by an amount equal to a sink current; a current integrator connected to the sensing line, which accumulates an adjusted current from the sensing line and outputs an integrated value based on the pixel current minus the sink current; a sampling part that samples and holds the integrated value; and an analog-to-digital converter that converts the integrated value from an analog value to a digital sensed value.

Current sensing type sensing unit and organic light-emitting display comprising the same

Disclosed is an organic light emitting display including: a display panel on which a plurality of gate lines, a plurality of data lines, and a plurality of pixels are arranged, each pixel including an organic light emitting diode (OLED); a gate driving circuit connected to the pixels through the gate lines; and a data driving circuit connected to the pixels through the data lines, wherein each of the pixels comprises: a driving thin film transistor (TFT); a first switch TFT; a second switch TFT; a third switch TFT; and a storage capacitor, and wherein the first to third TFTs and the driving TFT are P-type TFTs.

Organic light emitting display and driving method thereof

A touch sensor integrated display device and a method for driving the same are disclosed. The touch sensor integrated display device includes a display panel, in which a pixel array is divided into a plurality of touch blocks, each touch block includes pixels displaying an input image and a sensing target dummy pixel sensing a touch input, and the sensing target dummy pixel includes a dummy driving TFT configured to control a source-drain current based on a gate-source voltage, and a panel drive circuit, which in a touch sensing period, supplies a scan control signal and a sensing control signal to the sensing target dummy pixel and sets the gate-source voltage to turn on the dummy driving TFT by applying a touch driving data voltage to a gate node of the dummy driving TFT and applying a reference voltage to a source node of the dummy driving TFT.

Touch sensor integrated display device and method for driving the same

A data driver and a display device including the same. The data driver includes a DA converting circuit converting a digital signal into an analog signal and an output circuit disposed downstream of the DA converting circuit. The output circuit outputs two selected color data signals and one black voltage based on the data state of one reference data signal, and outputs one fixed color data signal.

Data driver and display device including the same

A sensing circuit capable of simplifying a configuration of a data driver by reducing a size of a sensing circuit provided at each data driver, and an organic light emitting diode (OLED) display device having the same are provided. The sensing circuit includes N sampling and holding circuits, a scaler and an analog-digital converter.

Sensing circuit and organic light emitting diode display device having the same

An image quality compensation device for an organic light emitting display includes: a memory having first and second update blocks selectively storing first and second period compensation values, which are sequentially updated at regular intervals; and a timing controller that configures the first update block as either the current memory page for data loading or the next memory page for data writing and the second update block as the other one of the two, based on a preset check code, and updates the memory by calculating the second period compensation value with the passage of driving time based on the first period compensation value loaded from the update block configured as the current memory page, writing the second period compensation value to the update block configured as the next memory page, and then erasing the first period compensation value from the update block configured as the current memory page.

Image quality compensation device and method for organic light emitting display

An organic light emitting display includes a display panel including data lines, gate lines crossing the data lines, and pixels and a panel driving circuit which supplies a data voltage to the pixels of the display panel during a power-on period and then is additionally driven for a predetermined power-on delay duration time delayed from a power-off start time of a power input signal. The panel driving circuit supplies a reverse polarity recovery voltage having a polarity opposite the data voltage to the pixels or supplies a recovery voltage, which is different from a gate voltage of a driving element of each of the pixels, to a source terminal of the driving element of each pixel for the predetermined power-on delay duration time.

Organic light emitting display

A driver assembly with an efficient mechanism for transferring heat away from an integrated circuit (IC) chip via a heat transfer member and conductive pattern lines formed on a substrate. The IC chip is mounted on connectors and is placed above the substrate. The IC chip operatively communicates with the display panel via at least a subset of the conductive pattern lines and a subset of the connectors. A heat transfer member is formed on the substrate and is configured to transfer heat generated by the integrated circuit to a component having a lower temperature than the IC chip. A heat transfer element is placed between the IC chip and the heat transfer member to transfer the heat generated by the IC chip to the heat transfer member.

Growing community of inventors

Goyang-si, South Korea

Seungtae Kim