Lg Display Co., Ltd.

University-Industry Cooperation Group of Kyung Hee University

Byung-Hwee Park

Seung-Woo Lee

Soon-Kwang Hong

Chang-Hoon Jeon

Keun-Choul Kim

Jong-Bin Kim

Seung-Kyu Kim

Min-Koo Kim

An organic electroluminescent display device, includes: a gray level extractor that extracts gray levels of frame data signals for a frame image; an image type determiner that determines a type of the frame image using a distribution of the gray levels of the frame data signals, the type of the frame image being one of a low-gray-level type, a medium-gray-level type and a high-gray-level type; a gamma reference voltage generator that selects a set of gamma reference voltages based upon the image type; a data driver converting the frame data signals into frame data voltages using the selected set of gamma reference voltages; a timing controller that supplies the frame data signals to the data driver; and a display area including pixels having an organic light emitting diode that display the frame image.

Organic electroluminescent display device including gamma reference voltage generator and method of driving the same

An organic light emitting diode (OLED) display device and a method for driving the same, are capable of achieving an enhancement in response characteristics of OLEDs and an enhancement in display picture quality through application of an overdriving (or accelerated driving) method taking into consideration intrinsic response characteristics of OLEDs. The OLED display device includes an image display panel including a plurality of pixel regions, and a driving integrated circuit for converting digital image data into an analog image signal, generating a plurality of gamma voltage levels through modulation, for overdriving or accelerated driving of the analog image signal, and modulating gray levels of the digital image data such that the modulated gray levels correspond to the modulated gamma voltage levels, for display of an image according to the modulated image data on the image display panel.

Organic light emitting diode display device with data modulator and a method for driving the same

Growing community of inventors

Daegu, South Korea

Byung-Hwee Park