Lg Display Co., Ltd.

Jisu Choi

MyungGi Lim

KyoungDon Woo

Taeyoung Lee

Seungtae Kim

Bumsik Kim

Byungjae Lee

KyungRok Kim

Hyemi Oh

Minkyu Song

A sensing circuit includes: a current source that outputs a direct current; an integrator that integrates a sensing current and the direct current, which is higher than the sensing current, to output an integrated value composed of the sum of a sensing voltage and a direct current voltage; and a subtractor that takes the sensing voltage from the integrated value outputted from the integrator, but not the direct current voltage.

Sensing circuit, data driver integrated circuit, display device and driving method thereof

A pixel sensing device, an organic light emitting display device and a pixel compensation method thereof are disclosed. The pixel sensing device comprises a plurality of current integrators for sensing driving characteristics of pixels. Each current integrator comprises: an operational amplifier equipped with an inverting input terminal to which a first input voltage is applied according to a pixel current of the pixels, a non-inverting input terminal to which a second input voltage is applied according to the pixel current, and an output terminal through which an integral voltage corresponding to the pixel current is output; and a feedback capacitor connected between the inverting input terminal and the output terminal. The operational amplifier comprises: a pre-amplifying unit for lowering an amplifier input gain and being equipped with the inverting and non-inverting input terminals; and two gain amplifying units for receiving an output of the pre-amplifying unit and for making an amplifier output gain higher than the amplifier input gain.

Pixel sensing device, organic light emitting display device, and pixel compensation method thereof

A data driver IC can include an analog-to-digital converter; a sensing part that, in a sensing mode for sensing the driving characteristics of pixels, samples a signal outputted from the pixels in response to a data voltage for sensing, and, in a calibration mode for sensing the output characteristics of the analog-to-digital converter, samples a calibration current and outputs the same to the analog-to-digital converter; and a current generator that generates N calibration currents by dividing an external input source current into N parts, where N is a natural number.

Data driver integrated circuit, display device comprising the same, and method of driving the same

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Paju-si, South Korea

Jisu Choi