Samsung Display Co., Ltd.

Samsung Mobile Display Co., Ltd.

Industry-university Cooperation Foundation Hanyang University

Woung Kim

Chang-Ho Hyun

In-Ho Choi

Naoaki Komiya

Wang-Jo Lee

Choon-Yul Oh

Joo-Hyeon Jeong

Myoung-Hwan Yoo

Ho-Ryun Chung

Oh-Kyong Kwon

A display device includes a display panel including a sub-pixel, a gate driver which provides a gate signal to the sub-pixel, a data driver which provides a data voltage to the sub-pixel, a driving voltage generator which provides a gamma reference voltage including a black data voltage to the data driver, and a driving controller which determines an offset voltage of the black data voltage based on at least one selected from a driving frequency, a dimming level, and a temperature.

Display device, method of driving the same, and electronic device including the same

A first reference voltage is applied to a plurality of pixels during a data writing period when data is written and a second reference voltage is applied to the plurality of pixels during a light emitting period when the plurality of pixels emit light, in which each of the plurality of pixels includes a switching transistor to transfer a data voltage applied to a data line to a first node; a driving transistor controlling a driving current flowing into an OLED according to the voltage of the first node and a first power supply voltage; and a storage capacitor including a first electrode connected to the first node and a second electrode receiving one of the first reference voltage and the second reference voltage. A difference between the first reference voltage and the second reference voltage is determined according to a threshold voltage deviation characteristic of the display unit.

Display device and driving method thereof for compensating a threshold voltage deviation characteristic of the display

An organic light emitting diode (OLED) display includes a display unit including a plurality of pixels, a plurality of scan lines, and a plurality of data lines, a data driver transmitting a plurality of data signals to the plurality of data lines, a scan driver transmitting a plurality of scan signals to the plurality of scan lines, a compensation controller supplying a predetermined first current to each OLED in each of the plurality of pixels during a sensing period for measuring a driving voltage of the OLED for each of a plurality of pixels, receiving the driving voltage of the OLED supplied with the first current, and outputting measuring data for the transmitted driving voltage; and a signal controller compensating an input video signal according to the measuring data to generate image data. The compensation controller is separate from and external to the data driver.

Display device and driving method thereof

A display device includes a plurality of pixels, each of said plurality of pixels includes a driving transistor and a light emitting diode, a compensator to receive first and second pixel currents generated by the plurality of pixels according to first and second data voltages respectively applied to the plurality of pixels, the compensator to calculate an image data compensation amount to compensate for variations in characteristics of the driving transistor of each of said plurality of pixels and a data selector to transmit the first and second data voltages to the plurality of pixels and to transmit the first and second pixel currents to the compensator, the compensator to measure the first and second pixel currents generated as a result of the first and second data voltages corresponding to different gray scale levels and to calculate an actual threshold voltage and mobility of the driving transistor of each of the pixels, the compensator including a measurement resistor, the compensator to control a resistance value of the measurement resistor, the measurement resistor to convert the first pixel current corresponding to the first data voltage into a first measured voltage and the second pixel current corresponding to the second data voltage into a second measured voltage.

Display device and method for driving the same

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Yongin, South Korea

Woung Kim