초록

An IR emitting device and an IR receiving device are employed to transmit data to and receive data from a public telephone network. As a result, the user interface of the portable telephone unit for non-voice communication service is improved.

대표청구항 ▼

[ What is claimed is:] [1.] A portable telephone unit which receives and transmits electronic voice signals and non-voice data signals, comprising:a transmitter/receiver circuit,display means for displaying at least text, including index information of a plurality of received items and a cursor adja

[ What is claimed is:] [1.] A portable telephone unit which receives and transmits electronic voice signals and non-voice data signals, comprising:a transmitter/receiver circuit,display means for displaying at least text, including index information of a plurality of received items and a cursor adjacent to one of said plurality of received items which is to be selected,user input means including means for moving said cursor according to a first user operation, and selection means for selecting said one of said plurality of received items with said cursor adjacent thereto according to a second user operation,control means for controlling the operation of said transmitter/receiver circuit and said display means, transferring electronic data signals between said control means and said transmitter/receiver circuit, and transferring at least some of the electronic data signals corresponding to said index information of said plurality of received items to said display means, in response to which said display means displays said index information of said plurality of received items corresponding to said at least some of the electronic data signals,a light emitting device for converting the electronic data signals corresponding to the selected one of said plurality of received items, supplied from said control means, into optical signals, anda light receiving device for receiving optical signals, converting them into electronic data signals, and supplying the converted electronic data signals to said control means.