Abstract: A display device includes a voltage generating unit configured to convert an input voltage into an analog driving voltage, a controller configured to receive input image data and an image control signal and generate custom image data and a data control signal, a source driving unit configured to receive the analog driving voltage and convert the custom image data into data voltages in response to the data control signal, a sensing unit configured to sense a load current, wherein the sensing unit is connected to one point on a path through which the input voltage is converted into the analog driving voltage to be provided to the source driving unit, and a display panel configured to receive the data voltages to display an image. The controller receives the sensed load current and generates a selection signal according to a first intensity of the load current.

Abstract: A data lines driver includes a digital to analog converter configured to generate a normal data voltage based on a data signal, a buffer configured to buffer the normal data voltage and a power-on/reset part configured to generate an initial data voltage varying according to time and to selectively output either the initial data voltage or the normal data voltage.

Abstract: A method of controlling an output voltage of an apparatus is provided. The method includes comparing an input voltage of the apparatus with a reference voltage, activating the output voltage when the input voltage is greater than or equal to the reference voltage, comparing the input voltage with a first low limit voltage or a first high limit voltage, comparing a first elapse time with a reference time when the input voltage is less than or equal to the first low limit voltage, comparing a second elapse time with the reference time when the input voltage is greater than or equal to the first high limit voltage, and deactivating the output voltage when the first elapse time or the second elapse time is longer than or equal to the reference time.

Abstract: A display device includes a display panel including data lines and scan lines coupled, a data driver configured to supply data voltages to the data lines based on digital video data, a scan driver configured to supply scan signals to the scan lines, a timing controller configured to select one of a normal mode and a self-refresh mode based on a panel self-refresh enable signal, where the data and scan drivers are driven by a first frame frequency in the normal mode and by a second frame frequency lower than the first frame frequency in the self-refresh mode, and a power supply source configured to supply driving voltages to the data and scan drivers and the timing controller and to transmits a direct current power voltage to an outside thereof, where a transmission of the direct current power voltage is blocked during a blank period in the self-refresh mode.