Patent ID: 7657841

Claim:
A monitor display to be installed within a cab of a mobile construction machine, adapted to selectively display sets of information including at least one of predetermined information stored in an information storage means and other information, characterized in that said monitor display comprises: a contents switch means for switching contents of said monitor display selectively from one set of information to another, wherein each set of information constitutes a screen; an output control means adapted to output contents of a selected screen to said monitor display according to a signal from said contents switch means; a machine status checkout means adapted to determine whether said mobile construction machine is currently in an operating state or in an idling state; a contents prohibiting means adapted to prohibit display of certain screens as long as said mobile construction machine is in an operating state, even if said switch means is manipulated to select any of said certain screens; wherein a plurality of said screens are categorized into one group including operation monitor screens, that are permitted to be selected during any of an operating state and an idling state of said mobile construction machine, and are arranged to display information including basic information and operation-assisting information; wherein a plurality of said screens are categorized into another group including instructive screens and setup screens, that are prohibited to be selected during an operating state of said mobile construction machine, but are permitted to be selected during an idling state of said mobile construction machine, and are arranged to display information including instructive information and setup information; and wherein said output control means is adapted to display a basic monitor screen preferentially to other operation monitor screens, while permitting to switch between said basic monitor screen and any one of other operation monitor screens by said contents switch means regardless of whether said mobile construction machine is in an operating state or in an idling state, and while permitting to switch to any one of said instructive screens and setup screens only when said mobile construction machine is in an idling state.