Lg Display Co., Ltd.

Min Kyu Chang

Jong Sik Shim

Shinji Takasugi

Woo Jin Nam

Hong Jae Shin

Hyo Jin Park

Jong Ho Lee

Jeong Pyo Lee

Joong Sun Yoon

Chang Woo Seok

In Young Yang

Disclosed is a display apparatus. The display apparatus performs external compensation by using sensing data generated through actual sensing and calculation data which is calculated based on the sensing data with a median filter.

Organic light emitting display apparatus performing a sensing for an external compensation

An organic light emitting display device includes a display panel including a plurality of pixels, wherein each pixel includes a driving transistor outputting a data current based on a data voltage to emit light from an organic light emitting diode; and a panel driver which drives the display panel in a sensing mode and a display mode, wherein the panel driver calculates a threshold voltage prediction value of the driving transistor for each pixel by sensing a mobility and a threshold voltage of the driving transistor for each pixel through a reference line connected with a sensing node between the driving transistor and the organic light emitting diode of each pixel for the sensing mode, and the panel driver drives each pixel based on the threshold voltage prediction value of the driving transistor of each pixel for the display mode.

Organic light emitting display device

Disclosed is an organic light emitting display device. The organic light emitting display device includes a white organic light emitting diode (OLED) formed in an emission area of each of a plurality of sub-pixels, a driving thin film transistor (TFT) configured to supply a driving current to the white OLED, a storage capacitor configured to include a first terminal coupled to the driving TFT and a second terminal coupled to an anode electrode of the white OLED, and a color filter formed in the emission area. At least one of a top metal of the storage capacitor and a top metal of the driving TFT is formed to not overlap the color filter.

Organic light emitting display device with short-circuit prevention

Disclosed is an organic light emitting display device including a pixel connected to a data line, a gate line group, and a reference line. The pixel includes an organic light emitting diode (OLED), a driving transistor configured to control a current flowing in the OLED, a first switching transistor configured to selectively supply a data voltage to a first node, a second switching transistor configured to selectively supply an initial voltage to a second node, a third switching transistor configured to selectively connect a third node to the reference line, a fourth switching transistor configured to selectively connect the first node to the third node, a first capacitor connected between the first and second nodes to store a threshold voltage of the driving transistor, and a second capacitor connected between the first and third nodes to store the data voltage supplied through the first switching transistor.

Organic light emitting display device and driving method thereof

Disclosed is a thin film transistor substrate which facilitates to improve output and transfer characteristics of thin film transistor, wherein the thin film transistor substrate comprises a thin film transistor comprising a lower gate electrode on a substrate, an active layer on the lower gate electrode, source and drain electrodes on the active layer, and an upper gate electrode on the source electrode, drain electrode and active layer, the upper gate electrode for covering a channel region defined by the source and drain electrodes; and a contact portion for electrically connecting the lower gate electrode with the upper gate electrode.

Growing community of inventors

Seoul, South Korea

Min Kyu Chang