Lg Display Co., Ltd.

Taeyoung Lee

KyoungDon Woo

OSung Do

MyungGi Lim

Jisu Choi

Changwoo Lee

Seungtae Kim

JaeHyun Kim

Bumsik Kim

Myunggi Lim

Byungjae Lee

Seokhyun Hong

KyungRok Kim

Jaeyoon Bae

Seongkee Park

Jungshik Lim

Mincheol Kim

Minkyu Song

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

A sensing circuit includes: a current source that outputs a direct current; an integrator that integrates a sensing current and the direct current, which is higher than the sensing current, to output an integrated value composed of the sum of a sensing voltage and a direct current voltage; and a subtractor that takes the sensing voltage from the integrated value outputted from the integrator, but not the direct current voltage.

Sensing circuit, data driver integrated circuit, display device and driving method thereof

The display device according to the present disclosure may comprise a display panel equipped with a plurality of pixels connected to data lines and sensing lines; a source drive IC configured to provide a data voltage to a pixel through the sensing line and equipped with a sensing block obtaining sensing data related to driving characteristics of the pixel using a signal input through the sensing line; a switch configured to control a connection via the sensing line between the pixel and the sensing block; and a power source configured to provide a test voltage or a test current to the sensing block, and the source drive IC may obtain calibration data for the sensing block by using the test voltage or the test current in a state that the switch disconnects the pixel and the sensing block.

Display device

A data driver IC can include an analog-to-digital converter; a sensing part that, in a sensing mode for sensing the driving characteristics of pixels, samples a signal outputted from the pixels in response to a data voltage for sensing, and, in a calibration mode for sensing the output characteristics of the analog-to-digital converter, samples a calibration current and outputs the same to the analog-to-digital converter; and a current generator that generates N calibration currents by dividing an external input source current into N parts, where N is a natural number.

Data driver integrated circuit, display device comprising the same, and method of driving the same

An organic light emitting display device in an embodiment of the present invention comprises a display panel equipped with a plurality of pixels each including an OLED and a driving TFT for driving the OLED and a sensing circuit connected to pixels through a sensing line and detecting driving characteristics of a corresponding pixel. The sensing circuit may comprise a plural sensing units including an integrator for integrating currents respectively flowing two adjacent sensing lines connected to inverting and non-inverting input terminals of a fully differential amplifier, a sampling unit for respectively sampling two integral outputs of the integrator and a scaler for regulating an operating range of outputs of the sampling unit, a differential amplifier for differentially amplifying one or more outputs of the scaler, and an ADC for converting an output of the differential amplifier into a digital sensing value.

Organic light emitting display device

The present invention relates to a carbon nanotube dispersion liquid includes carbon nanotubes, a self assembly material having &#x2014;NRin one terminal thereof and &#x2014;Si(OR)or &#x2014;SH in the other terminal thereof, and a solvent, as well as its usage.

Carbon nanotube dispersion liquid and method of manufacturing thin layer and display panel using the same

Growing community of inventors

Paju-si, South Korea

Taeyoung Lee