Patent ID: 9704021
Date: 2017-07-11
CPC Classifications: G06K,H04N

Claim:
1. An operating method of a video display device the method comprising: when a specific search keyword is inputted by a specific user for more than a predetermined number, adding via a control unit the specific search keyword to favorite keywords corresponding to the specific user; obtaining, via an image acquisition unit, a user's face image of the video display device; determining, via a control unit, whether the obtained user's face image is identical to one face image among at least one pre-stored user's face image; when the obtained user's face image is identical to the pre-stored user's face image, searching, via the control unit, for at least one favorite channel matching at least one favorite keyword corresponding to the pre-stored user's face image, wherein the at least one favorite keyword is pre-registered in a storage unit and the pre-registered favorite keyword is matched to the pre-stored user's face image; displaying the at least one favorite channel on a display unit; determining, via the control unit, whether the user watches a displayed favorite channel for more than a predetermined time; and when the displayed favorite channel does not switch for more than a predetermined time and the user is recognized from an image which the video display device obtains, displaying related information of the displayed favorite channel on the display unit, wherein the searching for the at least one favorite channel matching the at least one favorite keyword corresponding to the pre-stored user's face image comprises: if a face image for a plurality of users is obtained and each face image of the plurality of users is identical to the pre-stored user's face image, searching for a favorite channel matching an overlapping favorite keyword from respective favorite keywords corresponding to the plurality of user's face images, wherein the displaying the at least one favorite channel comprises: receiving a channel switching input; switching a channel displayed on the video display device according to the channel switching input; and when the channel displayed on the video display device switches more than a predetermined number according to the channel switching input of the user, displaying an entire list of the at least one favorite channel, and wherein the related information comprises at least one of search word information for a favorite keyword corresponding to the displayed favorite channel, blog information, site information, and news information.