Abstract: A method of forming an image with a plurality of colors of developer, the method including generating color printing data corresponding to colors, sensing remainders of the plurality of colors of developer, converting the color printing data into mono printing data for a reference color corresponding to color density of each color printing data if at least one of colors of developer is insufficient, and printing the mono printing data.

Abstract: A method of forming an image with a plurality of colors of developer, the method including generating color printing data corresponding to colors, sensing remainders of the plurality of colors of developer, converting the color printing data into mono printing data for a reference color corresponding to color density of each color printing data if at least one of colors of developer is insufficient, and printing the mono printing data.

Abstract: An image forming apparatus and method where a first terminal group comprises one or more host terminals, a second terminal group is connected to the first terminal group via a network and comprises one or more host terminals, and an image forming apparatus is connected to the first and second terminal groups via the network, and forms an image using a predetermined expendable material in response to a drive command issued by one of the host terminals belonging to the first or second terminal group. An expendable element has a memory that stores information regarding a remaining amount of expendable material for each of the first and second terminal groups. Accordingly, it is possible for host terminals to obtain the benefits of being connected to a plurality of image forming apparatuses from a single image forming apparatus.

Abstract: A network image forming apparatus and a printing method thereof in an image forming system automatically change print concentration according to a type of print data and printing the print data so as to provide convenience to a user. The printing method of the network image forming apparatus connected to at least one terminal device via a network includes receiving print data from the at least one terminal device, obtaining print output information using the type of the received print data, and changing a print concentration of the print data according to the obtained print output information and printing the print data.

Abstract: A printing method for a laser beam printer, including: generating a first video signal for printing a document image; converting the first video signal into a second video signal when a fast printing mode is selected; generating a driving signal for the fast printing mode and rotating a drum in response to the driving signal; and generating a laser beam in response to the second video signal and irradiating the laser beam onto the drum.

Abstract: An image forming apparatus and method where a first terminal group comprises one or more host terminals, a second terminal group is connected to the first terminal group via a network and comprises one or more host terminals, and an image forming apparatus is connected to the first and second terminal groups via the network, and forms an image using a predetermined expendable material in response to a drive command issued by one of the host terminals belonging to the first or second terminal group. An expendable element has a memory that stores information regarding a remaining amount of expendable material for each of the first and second terminal groups. Accordingly, it is possible for host terminals to obtain the benefits of being connected to a plurality of image forming apparatuses from a single image forming apparatus.

Abstract: A printing method for a laser beam printer, including: generating a first video signal for printing a document image; converting the first video signal into a second video signal when a fast printing mode is selected; generating a driving signal for the fast printing mode and rotating a drum in response to the driving signal; and generating a laser beam in response to the second video signal and irradiating the laser beam onto the drum.

Abstract: A facsimile mail system capable of receiving and printing out a literal message that a caller has left by using a telephone. The facsimile mail system forms a communication path upon detecting a ring signal and generates a first notification tone signal for notifying a start of a mail function to a calling party. Then, the system detects a DTMF signal generated from a telephone of the calling party and converts a literal message corresponding to the DTMF signal into an ASCII code which is to be stored into a memory. Further, the system compares a password received from the telephone of the calling party with a predetermined password, and prints out the stored literal message, if the received password coincides with the predetermined password.