Abstract: The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure shows high luminous efficiency and good lifespan by comprising a specific combination of the plural kinds of host compounds and a specific hole transport compound.

Abstract: A substrate processing method is provided. The substrate processing method comprises loading a substrate onto a substrate support inside a chamber, forming a plasma inside the chamber, providing a first DC pulse signal to an electromagnet that generates a magnetic field inside the chamber and processing the substrate with the plasma, wherein the first DC pulse signal is repeated at a first period including a first section and a second section subsequent to the first section, the first DC pulse signal has a first level during the first section, and the first DC pulse signal has a second level different from the first level during the second section.

Abstract: The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure shows high luminous efficiency and good lifespan by comprising a specific combination of the plural kinds of host compounds and a specific hole transport compound.

Abstract: An image display apparatus and a method of displaying an image are disclosed. The image display apparatus includes: a display; and a controller configured to display on the display a channel list area including a plurality of channels and an index group area including a plurality of index groups indexing the plurality of channels by grouping the plurality of channels, to dynamically determine the plurality of index groups to be displayed on the index group area based on information regarding the plurality of channels, and to control the display to display the plurality of index groups on the index group area.

Abstract: A display apparatus is provided. The display apparatus includes a display configured to display an object, a motor configured to rotate the display, a communicator configured to communicate with an input device that controls a movement state of the object, and a processor configured to, in response to the object being located in a preset area of the display, control a driving state of the motor to cause the display to rotate in a direction that corresponds to the preset area.

Abstract: An image forming apparatus includes a control unit to identify a type of an option unit using pre-stored ID information including information regarding a universal interface to which at least one type of option unit can be connected, a power supply unit, and an option unit connected to the universal interface. A plurality of switches is located along a power supply path between the option unit and the power supply unit. The pre-stored ID information includes the type of the option unit and level of power allowed for the type of option unit. The control unit controls on/off states of the plurality of switches so that power corresponding to the identified type of option unit can be supplied to the option unit. Accordingly, possible damage to the image forming apparatus due to inappropriate connection between the option unit and the image forming apparatus is prevented.

Abstract: An image forming apparatus includes a control unit to identify a type of an option unit using pre-stored ID information including information regarding a universal interface to which at least one type of option unit can be connected, a power supply unit, and an option unit connected to the universal interface. A plurality of switches is located along a power supply path between the option unit and the power supply unit. The pre-stored ID information includes the type of the option unit and level of power allowed for the type of option unit. The control unit controls on/off states of the plurality of switches so that power corresponding to the identified type of option unit can be supplied to the option unit. Accordingly, possible damage to the image forming apparatus due to inappropriate connection between the option unit and the image forming apparatus is prevented.

Abstract: An image forming apparatus includes a main body having an image forming unit, a medium feeding unit installed in the main body, having a loading plate to load a print medium thereon and to feed the loaded print medium to the image forming unit, a medium sensing unit which comprises an interference unit which operates to correspond with the print medium loaded on the loading plate and the print medium fed by the medium feeding unit and the print medium being in a registration position on a feeding path, and a sensor having a sensing position and sensing a movement of the interference unit, and a controller to determine whether the print medium is loaded on the loading plate and whether the print medium is in the registration position on the feeding path, based on a sensing signal of the sensor.

Abstract: An image forming apparatus includes an output control unit to change an output of an optical sensor to collectively recognize a plurality of print processes for a print job. The output control unit includes a first actuator to recognize whether paper is present in a printing medium cassette and a second actuator to recognize whether paper is being conveyed. This makes it possible to recognize whether paper is present in a printing medium cassette and whether paper is being conveyed based on the output of the optical sensor, thereby reducing a financial burden and preventing a reduction in a task efficiency of an optical sensor installation.