Patent Document ID: 9830908
Application ID: 14921237

Base Claim:
1. A display apparatus comprising: an input unit configured to receive a user command; a display; and a processor configured to obtain a phonetic symbol for the user command, determine whether or not the user command is suitable for a registration based on the phonetic symbol, and control the display to display a visual indication based on a result of the determination, wherein the processor determines whether or not the user command is suitable for the registration, based on at least one of a total number of the phonetic symbol, whether or not vowels and consonants of the phonetic symbol is successive, a configuration form of the phonetic symbols, the number of phonetic symbol for each word, and whether or not a predetermined weak phonetic symbol is included in the phonetic symbol.

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Claim 4:
4. The display apparatus as claimed in claim 1 , wherein the display displays a user interface (UI) guiding a registrable user command in response to the user command being determined to not be suitable for the registration, and outputs an audio for the user command in response the user command being determined to be suitable for the registration.