Regulator, display device including the same, electronic device including the same, and method of driving the same

A display device comprising:

• a display panel including a plurality of sub-pixels, a plurality of scan lines electrically connected to the plurality of sub-pixels, a plurality of data lines electrically connected to the plurality of sub-pixels, and a plurality of power lines electrically connected to the plurality of sub-pixels;
• a gate driving circuit including a scan driver configured to supply a scan signal to the plurality of scan lines;
• and
• a panel driving circuit including a data driver configured to supply a data signal to the plurality of data lines, a timing controller configured to control a driving timing of the data driver and the gate driving circuit, and a power generator configured to generate a plurality of target voltages,
• wherein the power generator includes a plurality of regulators, each configured to generate a respective one of the plurality of target voltages, each of the target voltages being supplied to the display panel, the gate driving circuit, or the data driver,
• the timing controller supplies a regulator control signal for controlling the power generator, and
• a bias current of at least one of the plurality of regulators is adjusted according to the regulator control signal.

An electronic device comprising:

• a host configured to transmit input image data;
• a power supply circuit configured to supply regulator driving power;
• and
• a display device comprising a display panel including a plurality of sub-pixels, a data driver configured to supply a data signal to the plurality of sub-pixels, a gate driving circuit configured to supply a gate signal to the plurality of sub-pixels, a regulator configured to generate a constant voltage derived from the regulator driving power, and a timing controller for controlling the regulator, the data driver, and the gate driving circuit,
• wherein the timing controller controls the data driver to output the data signal corresponding to the received input image data to the display panel in an active period of one frame period, and controls the gate driving circuit so that the plurality of sub-pixels emit light based on the data signal supplied during the active period in a blank period of the one frame period, and
• the timing controller outputs a regulator control signal for variably controlling a magnitude of a bias current of the regulator.

A method of driving an electronic device comprising a host configured to output input image data and a control signal, a display device configured to display an image corresponding to the input image data based on the control signal, and a power supply circuit configured to supply regulator driving power to the display device, the method comprising:

• outputting, by the host, a vertical synchronization signal defining one frame period and a data enable signal defining an active period and a blank period in the one frame period;
• outputting, by a timing controller of the display device, different respective regulator control signals in the active period and the blank period in response to the vertical synchronization signal and the data enable signal;
• and
• generating, by a regulator of the display device configured to generate a constant voltage, a bias current of different respective magnitudes in the active period and the blank period in response to the regulator control signal.