Patent ID: 6873307

Claim:
A display apparatus for displaying images based on signals received from a host, comprising: determining means for determining an appropriate one of a plurality of interface types to connect the display apparatus and said host; a plurality of storage means each storing specification information relating to the display for each one of the interface types to be connected, said plurality of storage means including two storage means, one for the DVI-I interface, and the other for the VGA interface, said storage means for the DVI-I interface being powered by said host only when the interface type is the DVI-I interface; output means for switching between or among the plurality of storage means based upon the determination by the determining means and for outputting, from said storage means to said host, the specification information corresponding to the appropriate one of the interface types determined by said determining means; and a peak hold circuit for generating a DC voltage based on synchronizing signals received from said host, said DC voltage generated by said peak hold circuit being supplied only to said storage means for the VGA interface and to said multiplexer.