Samsung Electronics Co., Ltd.

Jeongah Ahn

Hajun Lee

Youngsub Jin

Jiyong Jeong

Yongjoo Song

Hyungtae Kim

Jihoon Kim

Ji-Yong Jeong

Chon-Wook Park

A display driving circuit is provided. The circuit drives a display panel that includes data lines, sensing lines, and sub-pixels connected to the data lines and the sensing lines. The display driving circuit includes a data driver integrated circuit that drives the data lines. The data driver integrated circuit includes a driving block and a sensing block. The driving block includes plural digital-analog converters (DACs) each performing digital-analog conversion with respect to received sub-pixel data to generate output voltages and provide the output voltages of the DACs to the data lines. The sensing block measures grayscale voltages output from the DACs in a first operation mode and measures pixel voltages of the sub-pixels received from the sensing lines in a second operation mode.

Display driving circuit and operating method thereof

A sensing circuit includes initialization switches, shield switches, signal selection switches and a signal current integrator. The initialization switches apply an initialization voltage to sensing channels based on an initialization control signal. The shield switches apply a shield voltage different from the initialization voltage to the sensing channels based on shield control signals. The signal selection switches sequentially output sensing currents received from the sensing channels based on sensing control signals. The signal current integrator sequentially converts the sensing currents into sensing voltages. When a target sensing current is to be detected from a target sensing channel from the sensing channels, the shield voltage is applied to at least one shield sensing channel adjacent to the target sensing channel from the sensing channels.

Sensing circuit for detecting characteristics of display panel and display driver integrated circuit including the same

Provided are a data driver and a display driving circuit including the data driver. A data driver configured to drive a display panel including a plurality of subpixels connected to a plurality of sensing lines includes: a plurality of sample-and-hold circuits configured to perform a sampling operation on a plurality of sensing signals received via the plurality of sensing lines; a switching block configured to provide a first sensing signal among the plurality of sensing signals to a first sample-and-hold circuit in a first sensing period, and in a second sensing period, provide the first sensing signal to a second sample-and-hold circuit not being adjacent to the first sample-and-hold circuit in a second sensing period; and a converting circuit configured to generate a plurality of sensing values by amplifying and analog-to-digital converting on outputs of the plurality of sample-and-hold circuits.

Data driver and display driving circuit including the same

An operational amplifier circuit includes an operational amplifier and a control circuit. The operational amplifier includes a first input terminal, a second input terminal, and an output terminal connected with the second input terminal. The operational amplifier amplifies a signal provided through the first input terminal, and outputs the amplified signal through the output terminal. The control circuit generates switching signals. In response to the switching signals, the operational amplifier resets the output terminal to a preset voltage, charges the reset output terminal, and compares a voltage of the output terminal charged with a reference voltage provided through the first input terminal to output a comparison voltage.

Operational amplifier circuit, data driving circuit, and operation methods of the same

A method of canceling an offset of display device includes coinciding offset directions of amplifiers with one another and canceling offsets of the amplifiers through a chopping operation.

Growing community of inventors

Suwon-si, South Korea

Jeongah Ahn