Patent ID: 7173634

Claim:
An information displaying system, comprising: an A/D converting means for converting analog RGB signals inputted from a first input terminal to first digital RGB signals; a selecting means for selecting either second digital RGB signals inputted from a second input terminal or said first digital RGB signals based on the inputted order, and for outputting third digital RGB signals being selected digital RGB signals; a screen mixing means comprising: a first memory for storing said third digital RGB signals, and a second memory for storing digital information data inputted from a third input terminal, said screen mixing means detecting sizes of said third digital RGB signals and said digital information data, calculating designated control information, mixing said digital information data with said third digital RGB signals, generating a synchronization signal based on said designated control information, reading said third digital RGB signals from said first memory and said digital information data from said second memory based on said synchronization signal, and forming displaying data by mixing said third digital RGB signals read from said first memory and said digital information data read from said second memory, so that said digital information data are displayed without overlap at outsides of a displaying region of said third digital RGB signals in one or more regions at at least one of an upper, a lower, a right and a left side of said displaying region; and a displaying means for displaying said displaying data, the regions for displaying said digital information being at an edge of said displaying means.