Abstract: A method for fabricating a light emitting element includes preparing a substrate, and forming a first semiconductor material layer, a light emitting material layer, a second semiconductor material layer and an electrode material layer on the substrate, forming semiconductor rods spaced apart from each other by etching the first semiconductor material layer, the light emitting material layer, the second semiconductor material layer and the electrode material layer in a direction perpendicular to an upper surface of the substrate, forming an insulating layer surrounding sides of the semiconductor rods through a sol-gel process by immersing the substrate, including the semiconductor rods, in a solution containing a precursor material, and forming light emitting elements by separating the semiconductor rods, including the insulating layer, from the substrate, and the light emitting elements have an external quantum efficiency of 20.2±0.6%.

Abstract: Provided is an image forming apparatus which includes an image forming job unit in which a toner cartridge is mounted, a toner refill unit, and a controller. The toner refill unit may be connected to refill toner supplies, and to supply refill toner to the mounted toner cartridge from the refill toner supplies. The controller may control the image forming apparatus, based on an operation of the toner refill unit.

Abstract: Provided is an image forming apparatus which includes an image forming job unit in which a toner cartridge is mounted, a toner refill unit, and a controller. The toner refill unit may be connected to refill toner supplies, and to supply refill toner to the mounted toner cartridge from the refill toner supplies. The controller may control the image forming apparatus, based on an operation of the toner refill unit.

Abstract: An image forming apparatus having an error recovery function is provided. A communicator communicates with a cloud. A controller controls the image forming apparatus. The controller controls the image forming apparatus to detect an error occurring while a predetermined function is being executed, when the error is detected, access the cloud by using identification information of the image forming apparatus, transmit information about the error to the cloud, receive patch information for recovering from the error from the cloud, and recover from the detected error by using the patch information.

Abstract: An image forming apparatus includes a communication interface unit which allows the print controlling terminal to recognize the image forming apparatus as a printer, a determination unit which determines whether a printer driver of the image forming apparatus is installed in the print controlling terminal, a controlling unit which controls the communication interface unit to receive print data generated by the printer driver, and an image forming unit which prints the received print data, and the communication interface unit, if a printer driver is not installed in the print controlling terminal, controls the print controlling terminal to additionally recognize the image forming apparatus as an external storage medium and provides the print controlling terminal with a printer driver installation program stored in the external storage medium, and a method of performing the same.

Abstract: A user interface apparatus and method of using a touch screen are provided. The apparatus includes a touch screen division unit for dividing a screen area of the touch screen into zones, an allocation unit for allocating a user interface unit to each of the zones and a plurality of user interface units for sensing job commands input through the zones according to the allocation result of the allocation unit, wherein an operation corresponding to each of the sensed job commands is performed. Accordingly, since a plurality of users can simultaneously use an image-forming device by dividing the screen area of the touch screen into two or more zones, job processing time can be reduced, and a usage rate of a high specification image-forming device can be increased.

Abstract: A method of authenticating at least one piece of content provided to an image forming apparatus in which at least one consumable is disposed includes determining whether the at least one consumable includes authentication information of the at least one piece of content, displaying the at least one piece of content on a user interface according to a license policy corresponding to the authentication information, selecting at least one piece of content from the at least one piece of content displayed on the user interface, and executing the selected at least one piece of content.

Abstract: An image forming apparatus includes a communication interface unit which allows the print controlling terminal to recognize the image forming apparatus as a printer, a determination unit which determines whether a printer driver of the image forming apparatus is installed in the print controlling terminal, a controlling unit which controls the communication interface unit to receive print data generated by the printer driver, and an image forming unit which prints the received print data, and the communication interface unit, if a printer driver is not installed in the print controlling terminal, controls the print controlling terminal to additionally recognize the image forming apparatus as an external storage medium and provides the print controlling terminal with a printer driver installation program stored in the external storage medium, and a method of performing the same.

Abstract: An apparatus and a method of controlling a scanner include a transmission speed detector and a controller. The transmission speed detector detects data transmission speed information between a host and the scanner. The controller controls a scanning speed of the scanner based on a scan resolution and the detected transmission speed information.

Abstract: A method to control an application installed on an image forming apparatus includes checking current status information of the image forming apparatus, comparing the checked current status information with executability information to execute a pre-stored application, and if the application is executable as a result of the comparing, executing the application, and if the application is not executable, displaying information that the application is not executable.

Abstract: A method of authenticating at least one piece of content provided to an image forming apparatus in which at least one consumable is disposed includes determining whether the at least one consumable includes authentication information of the at least one piece of content, displaying the at least one piece of content on a user interface according to a license policy corresponding to the authentication information, selecting at least one piece of content from the at least one piece of content displayed on the user interface, and executing the selected at least one piece of content.

Abstract: A user interface apparatus and method of using a touch screen are provided. The apparatus includes a touch screen division unit for dividing a screen area of the touch screen into zones, an allocation unit for allocating a user interface unit to each of the zones and a plurality of user interface units for sensing job commands input through the zones according to the allocation result of the allocation unit, wherein an operation corresponding to each of the sensed job commands is performed. Accordingly, since a plurality of users can simultaneously use an image-forming device by dividing the screen area of the touch screen into two or more zones, job processing time can be reduced, and a usage rate of a high specification image-forming device can be increased.

Abstract: An apparatus and a method of controlling a scanner include a transmission speed detector and a controller. The transmission speed detector detects data transmission speed information between a host and the scanner. The controller controls a scanning speed of the scanner based on a scan resolution and the detected transmission speed information.