Cursor key unit for a computer having a mouse function removably

Details Cursor key unit for a computer having a mouse function removably Cursor key unit for a computer having a mouse function removably

1990-02-09

1991-09-17

Shaw, Dale M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340709, 36470901, G06F 1500, G09G 302

Patent

active

050498630

ABSTRACT:
A computer includes a key input unit having both cursor keys and a mouse mechanism, a keyboard having a holding section for detachably holding the key input unit, and a connector which electrically connects the key input unit and the keyboard together when the key input unit is held in the holding section of the keyboard. The computer further includes a signal transmitter which transmits a signal from the key input unit to the keyboard when the key input unit is removed from the holding section of the keyboard. The signal transmitter is made up of a light-emitting section and a light-receiving section. The light-emitting section is provided for the key input unit, and converts a signal entered from the key input unit into an optical signal and emits this optical signal. The light-receiving section is provided for the keyboard, and receives the optical signal emitted from the light-emitting section and converts the optical signal into an electric signal. Through the light-emitting section and light-receiving section, a signal entered from the key input unit is transmitted to the keyboard.

REFERENCES:
patent: 4181966 (1980-01-01), Wenninger et al.
patent: 4654818 (1987-03-01), Wetterau, Jr.
patent: 4736191 (1988-04-01), Matzke et al.
patent: 4754268 (1988-06-01), Mori
patent: 4917516 (1990-04-01), Retter
patent: 4933670 (1990-06-01), Wislocki

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