Abstract: An extending type of display apparatus of which the screen can be extended by connecting a plurality of display units each having the same configuration to each other, in which the display unit comprises a plurality of display elements arrayed in a matrix, a controller for controlling each display state of each display element, a memory for storing therein each address information for each of the display elements, a signal transmitting section for signal transaction between controllers, and a power transmitting section for supplying power, and the controller executes signal transaction with controllers of any other display units adjacent to the controller through the signal transmitting section, recognizes a size of the screen obtained by connecting a plurality of the display units to each other as well as a position of the unit in the screen, and generates each address information according to the position of the unit to be stored in a memory.

Abstract: An extending type of display apparatus of which the screen can be extended by connecting a plurality of display units each having the same configuration to each other, in which the display unit comprises a plurality of display elements arrayed in a matrix, a controller for controlling each display state of each display element, a memory for storing therein each address information for each of the display elements, a signal transmitting section for signal transaction between controllers, and a power transmitting section for supplying power, and the controller executes signal transaction with controllers of any other display units adjacent to the controller through the signal transmitting section, recognizes a size of the screen obtained by connecting a plurality of the display units to each other as well as a position of the unit in the screen, and generates each address information according to the position of the unit to be stored in a memory.

Abstract: An extending type of display apparatus of which the screen can be extended by connecting a plurality of display units each having the same configuration to each other, in which the display unit comprises a plurality of display elements arrayed in a matrix, a controller for controlling each display state of each display element, a memory for storing therein each address information for each of the display elements, a signal transmitting section for signal transaction between controllers, and a power transmitting section for supplying power, and the controller executes signal transaction with controllers of any other display units adjacent to the controller through the signal transmitting section, recognizes a size of the screen obtained by connecting a plurality of the display units to each other as well as a position of the unit in the screen, and generates each address information according to the position of the unit to be stored in a memory.

Abstract: A display system is realized by setting virtual units on a screen display section constructed with nine display units and repeatedly splitting the screen into four portions, allocating virtual addresses each expressed with a binary value for each split level to each split unit of the screen (area). Thus, by setting the virtual units, the screen can be split into two portions (into four portions on the whole) even if there are physically only three display units along one side of the screen. For this reason, even when the screen is repeatedly split into four portions and each address is set to each of the split units to display an image, the image is not trimmed of any part thereof.

Abstract: The image sensor according to the present invention comprises a light emitting diode which irradiates light onto a document image, a phototransistor which receives the reflected light and executes photoelectric conversion, an amplifier which amplifies an analog signal from the phototransistor, a time constant circuit into which an analog signal from the amplifier is inputted and which delays the analog signal by a specified period of time, an amplifier into which the analog signal outputted from the amplifier and the analog signal delayed in the time constant circuit are inputted and which differentially amplifies the analog signals, and a knot gate into which the analog signals outputted from the amplifier are inputted and which outputs a digital signal of "0" or "1" according to whether a value for the analog signal is positive or negative.