Lg Display Co., Ltd.

Young-Hak Lee

Han-Wook Hwang

Joong-Sun Yoon

Geun-Young Kim

An organic light emitting diode (OLED) display device and a method of driving the same are discussed. The method includes sensing a threshold voltage and mobility of a driving thin film transistor (TFT) included in each pixel using a sensing line connected per pixel and supplying the threshold voltage and the mobility to a timing controller in a measurement mode, by a data driver, and supplying image data input from an external source to the data driver by a timing controller, the timing controller adding and multiplying an offset value and gain value corresponding to the threshold voltage and mobility of the driving TFT, sensed by the data driver in the measurement mode, with the image data to compensate the image data, wherein the compensation of the image data includes varying a weight of the gain value according to luminance of the image data.

Organic light emitting diode display for compensating image data and method of driving the same

A pixel circuit of an OLED display device is disclosed. The pixel circuit includes a light emitting element, a driving TFT for driving the light emitting element, a delivery capacitor connected between a first node and a second node, a storage capacitor connected between the second node and a third node, a first reset TFT for initializing the first node to a reference voltage in response to a first reset signal from a first reset line, a second reset TFT for initializing the third node to an initialization voltage in response to the first reset signal from the first reset line, a third reset TFT for initializing the second node to the reference voltage in response to a second reset signal from a second reset line, and a switching TFT for supplying a data voltage to the first node in response to a scan signal from a scan line.

Pixel circuit of organic light emitting diode display device for compensating for a characteristic deviation of a driving thin film transistor

An in-plane switching liquid crystal display device includes a gate line and a data line on a substrate, the gate and data lines crossing each other to define a pixel region, a thin film transistor electrically connected to the gate and data lines, a pixel electrode connected to the thin film transistor, and a common electrode alternately arranged with the pixel electrode to form n blocks in the pixel region. Widths of some of the blocks are different than widths of other of the blocks.

Growing community of inventors

Paju-si, South Korea

Young-Hak Lee