Display device for transmitting advertisement content and method for controlling same

A method of controlling a display device, the method comprising:

• displaying content;
• downloading a copy of blocks connected in a form of a chain from an electronic device on a blockchain network, the blocks containing a plurality of smart contracts that is contracts corresponding to a plurality of advertisement content items, respectively,
• obtaining content-related information by using at least one of a frame of the content and a content recognition artificial intelligence (AI) algorithm, the content- related information including category of the content;
• generating viewing information about the content, based on at least one of usage history of the display device, user input and the content-related information;
• determining advertisement content related to the content from among the plurality of advertisement content items based on the viewing information and the plurality of smart contracts, wherein the advertisement content includes advertisement content metadata;
• broadcasting a record information indicating that the advertisement content has been determined to the blockchain network;
• receiving a signal indicating that a new block generated based on the record information is valid and information about the new block;
• appending the new block to the downloaded copy of blocks, based on the information about the new block;
• in response to receipt of the signal indicating that the new block is valid, receiving the determined advertisement content from an advertiser device based on the advertisement content metadata;
• detecting an occurrence of a predefined event while the content is being displayed;
• and
• reproducing the received advertisement content upon detection of the predefined event.

A computer-readable recording medium storing one or more instructions for controlling a display device, wherein the one or more instructions cause the display device to:

• display content;
• download a copy of blocks connected in a form of a chain from an electronic device on a blockchain network, the blocks containing a plurality of smart contracts that is contracts corresponding to a plurality of advertisement content items, respectively;
• obtain content-related information by using at least one of a frame of the content and a content recognition artificial intelligence (AI) algorithm, the content-related information including category of the content;
• generate viewing information about the content, based on at least one of usage history of the display device, user input and the content-related information;
• determine advertisement content related to the content from among the plurality of advertisement content items based on the viewing information and the plurality of smart contracts, wherein the advertisement content includes advertisement content metadata;
• broadcast a record information indicating that the advertisement content has been determined to the blockchain network;
• receive a signal indicating that a new block generated based on the record information is valid and information about the new block;
• append the new block to the downloaded copy of blocks, based on the information about the new block;
• in response to receipt of the signal indicating that the new block is valid, receive the determined advertisement content from an advertiser device based on the advertisement content metadata;
• detect an occurrence of a predefined event while the content is being displayed;
• and
• reproduce the received advertisement content upon detection of the predefined event.