Lg Display Co., Ltd.

Ui Taek Jeong

Dae Hyeon Park

Kyoung Sik Choi

Jin Hyoung Kim

Seung Tae Kim

Seung Chan Byun

Boeon Byeon

Hyung Rae Kim

Jung Yoon Yi

An organic light emitting display device includes a display panel having a plurality of sub-pixels; a memory configured to accumulate and store data displayed by each sub-pixel; and a panel driver configured to: calculate a degradation compensation gain value for increasing or decreasing a luminance of each sub-pixel based on accumulated data of each sub-pixel stored in the memory, generate modulated data of each sub-pixel by modulating input data to each sub-pixel according to the calculated degradation compensation gain value, convert the modulated data into a data voltage, and accumulate the modulated data from the accumulated data of the corresponding sub-pixel and then store the data in the memory.

Organic light emitting display device and method for driving thereof

An organic light-emitting display device includes: an organic light-emitting panel defined into a plurality of pixel regions which each includes a drive transistor configured to drive an organic light emission element and a load capacitor configured to charge a threshold voltage of the drive transistor; and a controller configured to calculate an offset information on the basis of the threshold voltage and derive a second image signal by reflecting the offset information to a first image signal.

Organic light-emitting display device to compensate pixel threshold voltage

An organic light-emitting display device includes: an organic light-emitting panel comprising a plurality of pixel regions, each pixel region comprising a scan line and a data line crossing each other, each pixel region further comprising an organic light-emission element and a drive transistor configured to drive the organic light emission element; and a circuit configured to sense a threshold voltage of the drive transistor in a sensing interval and control a light emission of the organic light emission element within the pixel region in a display interval.

Disclosed is an organic light emitting display device and a method for driving the same to prevent luminance variations caused by degradation variations, and to prevent picture quality from being deteriorated by residual images caused by the luminance variations. The device includes a display panel having a plurality of sub-pixels, each sub-pixel having an organic light emitting diode; a memory which stores accumulated data of each sub-pixel therein; and a panel driver which accumulates input data of each sub-pixel every accumulation period, stores the accumulated data in the memory, generates a degradation compensation gain value of each sub-pixel, generates modulated data of each sub-pixel by modulating the input data of each sub-pixel in accordance with the degradation compensation gain value of each sub-pixel, converts the modulated data into the data voltage, and supplies the data voltage to each sub-pixel.

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Seoul, South Korea

Ui Taek Jeong