Abstract: The subject invention provides an image forming device including a main control section and a signal detection circuit for detecting presence or absence of an external signal supplied to the main control section, and further provided with an interface section for controlling external communication; a main power supply circuit; a power supply control circuit. The signal detection circuit includes a low power mode prohibition circuit for outputting a low power mode prohibition signal for voiding the request for low power consumption with respect to the power supply control circuit or the main power supply circuit while the external signal is supplied to the signal detection circuit. With this arrangement, the present invention provides an image forming device capable of appropriate transition into the low power consumption operation by hardware without use of software.

Abstract: An object of the invention is to provide a display device of an image forming apparatus capable of displaying information that the user wants to obtain in a visually easy-to-recognize manner. In a compound image forming apparatus provided with: one of original reading means for reading image information from an original, image receiving means for receiving image information from a terminal connected to a network and a line image receiving means for receiving image information from a telephone line; image forming means for forming an image based on the image information obtained by the means; and a display portion for displaying the condition of the apparatus, a display condition control portion is provided that changes the display condition of the display portion to a visually easy-to-recognize condition when the condition of the compound image forming apparatus is changed.

Abstract: The subject invention provides an image forming device including a main control section and a signal detection circuit for detecting presence or absence of an external signal supplied to the main control section, and further provided with an interface section for controlling external communication; a main power supply circuit; a power supply control circuit. The signal detection circuit includes a low power mode prohibition circuit for outputting a low power mode prohibition signal for voiding the request for low power consumption with respect to the power supply control circuit or the main power supply circuit while the external signal is supplied to the signal detection circuit. With this arrangement, the present invention provides an image forming device capable of appropriate transition into the low power consumption operation by hardware without use of software.

Abstract: An object of the invention is to provide a display device of an image forming apparatus capable of displaying information that the user wants to obtain in a visually easy-to-recognize manner. In a compound image forming apparatus provided with: one of original reading means for reading image information from an original, image receiving means for receiving image information from a terminal connected to a network and a line image receiving means for receiving image information from a telephone line; image forming means for forming an image based on the image information obtained by the means; and a display portion for displaying the condition of the apparatus, a display condition control portion is provided that changes the display condition of the display portion to a visually easy-to-recognize condition when the condition of the compound image forming apparatus is changed.

Abstract: An object of the invention is to provide a display device of an image forming apparatus capable of displaying information that the user wants to obtain in a visually easy-to-recognize manner. In a complex image forming apparatus provided with: one of original reading means for reading image information from an original, image receiving means for receiving image information from a terminal connected to a network and a line image receiving means for receiving image information from a telephone line; image forming means for forming an image based on the image information obtained by the means; and a display portion for displaying the condition of the apparatus, a display condition control portion is provided that changes the display condition of the display portion to a visually easy-to-recognize condition when the condition of the complex image forming apparatus is changed.

Abstract: An object of the invention is to provide a display device of an image forming apparatus capable of displaying information that the user wants to obtain in a visually easy-to-recognize manner. In a complex image forming apparatus provided with: one of original reading means for reading image information from an original, image receiving means for receiving image information from a terminal connected to a network and a line image receiving means for receiving image information from a telephone line; image forming means for forming an image based on the image information obtained by the means; and a display portion for displaying the condition of the apparatus, a display condition control portion is provided that changes the display condition of the display portion to a visually easy-to-recognize condition when the condition of the complex image forming apparatus is changed.