초록 ▼

A small-sized lightweight portable hand-held housing is provided with elements for visually displaying selected combinations of information quantities such as musical notes of scales and chords. The displays are operated by signals from programmable read only memory elements in the housing. Manually

A small-sized lightweight portable hand-held housing is provided with elements for visually displaying selected combinations of information quantities such as musical notes of scales and chords. The displays are operated by signals from programmable read only memory elements in the housing. Manually operable selector elements such as push button switches on the housing are used to select particular combinations to be displayed. A circuit including digital logic elements converts manual operation of a selector element into operation of appropriate memory elements to activate the displays.

대표청구항 ▼

Apparatus for displaying selected combinations of information quantities in the form of musical notes of scales and chords comprising: a. a housing which is small in size and light in weight so as to be portable; b. display means on said housing for providing a visual display of said selected combin

Apparatus for displaying selected combinations of information quantities in the form of musical notes of scales and chords comprising: a. a housing which is small in size and light in weight so as to be portable; b. display means on said housing for providing a visual display of said selected combinations of information quantities, said display means comprising first and second groups of display elements for displaying alphabetical letters corresponding to musical notes of scales and chords, respectively; c. storage means in said housing and operatively connected to said display means, said storage means storing signals for operating said display means to display said information quantities, said storage means comprising first and second programmable memory means each providing predetermined combinations of logical output signals in response to particular combinations of logical input signals, said first and second memory means being operatively coupled to said first and second groups of display elements, respectively, said first and second memory means being operatively connected together; d. selector means on said housing and including first and second groups of manually operated selector elements for selecting particular combinations of said information quantities in the form of musical notes and scales, as determined by the particular ones on of said selector elements which are manually operated; and e. circuit means for converting manual operation of said selector elements into operation of said storage means to operate said display means, said circuit means including means for converting operation of said selector elements into logic signals for inputs to said first and second memory means.