Method for improving slew rate of amplifier circuit and display device using the same

A display device comprising:

• a gate driver configured to sequentially provide a gate-on signal to a plurality of gate lines in response to a gate control signal;
• a source driver configured to, in response to a data control signal, convert digital image data into analog image signals and provide the converted image signals to a plurality of data lines;
• a display panel comprising a plurality of sub-pixels provided at intersections of the plurality of gate lines and the plurality of data lines;
• and
• a timing controller configured to externally receive a video image data, generate the digital image data, provide the generated digital image data to the source driver, and generate the gate control signal and the data control signal,
• wherein the source driver comprises:
• a data latch configured to latch the digital image data received from the timing controller;
• a digital-to-analog converter (DAC) configured to convert the latched digital image data to an analog signal;
• and
• a driving amplifier configured to amplify the analog signal outputted from the DAC and provide the amplified analog signal to the plurality of data lines,
• and wherein the driving amplifier comprises a slew rate improvement circuit configured to increase a slew rate based on the digital image data corresponding to the analog signal displayed on the plurality of sub-pixels during a horizontal line time.

A method for increasing a slew rate of a driving amplifier, the method comprising:

• setting a threshold code;
• obtaining a first code of a digital image data corresponding to an input voltage of the driving amplifier, during a current horizontal line time, and a second code of a digital image data corresponding to an input voltage of the driving amplifier, during a next horizontal line time;
• generating a slew rate improvement circuit execution command based on a result of a comparison between a value of the threshold code and a difference between a value of the second code and a value of the first code;
• generating information required for an operation of the slew rate improvement circuit in response to the generated execution command;
• and
• generating a control signal to operate the slew rate improvement circuit based on the generated information.