Abstract: An electronic device includes a display panel, a data driving circuit, a scan driving circuit, and a signal control circuit that receives input data. The signal control circuit includes a histogram check unit that divides data of one frame among the input data into a plurality of regions based on a gray scale and calculates a distribution of the data based on the plurality of regions, a gray check unit that calculates the number of major grayscales having data of a specific number or more among the input data, an optical waveform analysis unit that generates a signal calculated based on an optical waveform of the plurality of pixels, and a frequency selection unit that selects a driving frequency of the display panel based on the distribution of the data, the number of the major grayscales, and the signal.

Abstract: A pixel includes a light-emitting element, a driving switching element and a noise switching element. The driving switching element applies a driving current to the light-emitting element. The noise switching element outputs a noise signal having a noise frequency to an input electrode of the driving switching element in response to a noise control signal. The noise frequency is equal to or greater than a driving frequency of the pixel. The noise signal having a periodicity is applied to the input electrode of the driving switching element of the pixel.

Abstract: A method and an apparatus for operating a User Interface (UI) of a conference call terminal are provided. The method includes operating a first camera and a second camera when a conference call is initiated, outputting an output image of a conference call screen comprising a first image and a second image collected from the first camera and the second camera, the first image and the second image being arranged not to overlap, and distinguishing a speaking person's image from another person's image, when the speaking person's image is detected in the output image of the conference call screen.

Abstract: A method and an apparatus for issuing electronic money from an electronic device are provided. The method includes accessing, by a first electronic device, an electronic payment server by executing an electronic payment application, displaying a banking list received from the electronic payment server, displaying a template for creating the electronic money of a specific banking facility selected from the banking list, receiving an input of at least one feature of the electronic money in a template, and transmitting the template including the at least one feature of the electronic money to the electronic payment server to issue the electronic money.

Abstract: A method for operating an electronic device is provided. The method includes determining validity of a first key, generating, when the first key is valid, a second key, and granting access to a designated area of the electronic device by use of the second key. Other various embodiments are possible on the basis of the above method.

Abstract: A method and an apparatus for managing contents are provided. The method includes determining a current time when a request for generating contents is made, determining a reference time corresponding to a standard time in a preset time zone based on the current time, storing the current time and the reference time in metadata of the contents, and storing the contents.

Abstract: An apparatus for displaying characters in a mobile device includes a screen configured to display an input window containing a virtual keyboard and a message window, wherein the screen is configured to receive one or more characters through a virtual keyboard in the input window on a screen in a typing mode, and a controller configured to cause the screen to display the one or more characters in the input window, and a message window on the screen at a substantially same time by each character received. A method includes receiving one or more characters through a virtual keyboard in an input window on a screen in a typing mode, and displaying the one or more characters in the input window, and a message window on the screen at a substantially same time by each character received. Other embodiments are disclosed.

Abstract: A method and an apparatus for operating a User Interface (UI) of a conference call terminal are provided. The method includes operating a first camera and a second camera when a conference call is initiated, outputting an output image of a conference call screen comprising a first image and a second image collected from the first camera and the second camera, the first image and the second image being arranged not to overlap, and distinguishing a speaking person's image from another person's image, when the speaking person's image is detected in the output image of the conference call screen.

Abstract: An electronic device controls a transparent display using a transparent display unit having a front side, a rear side and a lateral side, and allowing penetration of light. A light transmittance adjustable panel is disposed at one or more sides of the transparent display unit and a control unit automatically adjusts light transmittance of at least part of the transmittance adjustable panel in response to data associated with an event.