Samsung Electronics Co., Ltd.

Taeksu Kwon

DongWook Suh

Jihoon Kim

Jungmoon Kim

Insuk Kim

Yunseok Jang

Keunhwa Park

A display device includes a first decoder configured to select a first input voltage based on one or more gamma voltages during a first calibration sequence of a plurality of calibration sequences, a first amplifier configured to generate and output a first output voltage during the first calibration sequence, the first output voltage generated by amplifying the first input voltage, a second decoder configured to select one or more first reference voltages based on the one or more gamma voltages during the first calibration sequence, a second amplifier configured to output a first comparison result during the first calibration sequence based on the first output voltage and the one or more first reference voltages, and processing circuitry configured to determine a first compensation value based on the first comparison result during the first calibration sequence, the first compensation value compensating for a first offset of the first output voltage.

Display device based on amplifier offset compensation and operating method thereof

An operational amplifier compensation circuit includes; a first transistor activated/deactivated in response to a signal level difference between an input signal applied to an operational amplifier and an output signal provided by the operational amplifier, a first signal amplifying circuit including a second transistor and a first load, wherein the first signal amplifying circuit is configured to generate a first gate voltage amplified in response to the voltage level difference between the input signal and the output signal in relation to an internal resistance of the second transistor and a resistance of the first load when the first transistor is activated, and a third transistor configured to generate a first compensation current in response to the amplified first gate voltage and provide the first compensation current to the operational amplifier.

Operational amplifier circuit and operational amplifier compensation circuit for amplifying input signal at high slew rate

A display device includes a first gamma line providing a first gamma voltage; a second gamma line providing a second gamma voltage; a local tab point line; a first switch configured to connect the first gamma line to the local tab point line based on a tab division enable signal; and a second switch configured to connect the second gamma line to the local tab point line based on the tab division enable signal.

Display device and operating method thereof

A display device including: a display panel including first and second data lines, a first and second pixels connected to first and second data lines in first pixel row, third and fourth pixels connected to the second data line in a second pixel row; and a display driver configured to receive image data including first, second, third and fourth pixel data for the first, second, third and fourth pixels, and provide first, second, third and fourth data voltages corresponding to the first, second, third and fourth pixel data to the first, second, third and fourth pixels through the first and second data lines, the display driver further configured to: calculate average data of the first and second pixel data; and selectively perform a charge sharing operation between the first and second data lines according to whether a first increase/decrease condition and a second increase/decrease condition are satisfied.

Growing community of inventors

Suwon-si, South Korea

Taeksu Kwon