Display device and method for controlling same

A display device comprising:

• a user input receiver configured to receive a user input corresponding to a Push to Talk (PTT) function from a user;
• a voice receiver configured to receive an utterance voice from the user;
• a memory storing a plurality of Voice Assistance (VA) applications associated with a plurality of VA servers that provide a conversation service based on the utterance voice from the user;
• and
• a processor configured to:
• based on the user input corresponding to the PTT function for performing a function corresponding to at least one VA application being received through the user input receiver, perform a function corresponding to a first VA application among the plurality of VA applications according to setting information of the function corresponding to the first VA application to be automatically performed by the user input corresponding to the PTT function, and
• based on the utterance voice including a wake up word for performing a function corresponding to a second VA application among the plurality of VA applications being received through the voice receiver, change the setting information stored in the memory such that the function corresponding to the second VA application is automatically performed by the user input corresponding to the PTT function,
• wherein the processor is further configured to:
• based on the user input corresponding to the PTT function for performing the function corresponding to the at least one VA application through the user input receiver being received after changing the setting information, perform the function corresponding to the second VA application among the plurality of VA applications according to the changed setting information of the second VA application to be automatically performed by the user input corresponding to the PTT function,
• wherein the first VA application is associated with a first VA server among the plurality of VA servers, and the second VA application is associated with a second VA server different from the first VA server among the plurality of VA servers.