Samsung Displayco., Ltd.

Samsung Display Co., Ltd.

Young Seob Kim

Ji Tae Kim

Kyung Ho Hwang

Taewook Kim

Byungchang Shim

Jungsun Lee

Seungyong Synn

A display device includes a display panel, and a panel driver configured to drive the display panel. In an active period of a frame period, the panel driver generates data voltages based on a gamma voltage, provides the data voltages to a plurality of pixels through a plurality of data lines, and provides scan signals having a gate-on voltage to the plurality of pixels through a plurality of scan lines. In a black period of the frame period, the panel driver outputs a black data voltage to the plurality of data lines, and outputs a gate-off voltage to the plurality of scan lines. In a display-off period, the panel driver outputs the gamma voltage to the plurality of data lines, outputs the gate-off voltage to the plurality of scan lines, and adjusts at least one of the gamma voltage and the gate-off voltage.

Display device, and method of operating a display device

An organic light emitting display device includes a gamma reference voltage setter to set a gamma reference voltage, a gamma reference voltage generator to generate a gamma reference voltage set by the gamma reference voltage setter, and a gamma voltage generator to generate a gamma voltage based on the gamma reference voltage. The gamma reference voltage setter sets the gamma reference voltage to a first temporary value, increases the first temporary value by a first delta value, searches a second temporary value at which luminance of the display panel is less than a preset value, and sets the gamma reference voltage based on the searched second temporary value.

Organic light emitting display device and method for setting gamma reference voltage thereof

An organic light emitting display device comprises a first pixel region including first pixels which are driven in response to data signals when the organic light emitting display device is driven in a first mode and a second mode; a first scan driver which supplies scan signals to first scan lines connected to the first pixels; and a first light emitting driver which supplies light emission control signals to first light emission control lines which are connected to the first pixels. During one frame period in the second mode, the first light emitting driver supplies K light emission control signals to each of the first light emission control lines when a still image is displayed in the first pixel region, and supplies J light emission control signals to each of the light emission control lines when a moving image is displayed in the first pixel region.

Organic light emitting display device and driving method thereof

Growing community of inventors

Yongin-si, South Korea

Young Seob Kim