Patent ID: 8787986

Claim:
A mobile terminal, comprising: a mobile communication unit configured to transmit and receive a radio signal over a communication network; a display unit configured to display visual information processed in the mobile terminal; an input unit configured to receive a user input; at least one sensor configured to detect user's gaze information; an execution controller configured to execute screen lock when detecting a lack of the user input for a first delay time T 1 ; and a change controller configured to change the first delay time T 1 based on the user's gaze information, wherein the change controller determines that a user substantially stares at the display unit based on the user's gaze information, the user's gaze information including an image of the user, wherein the change controller further configured to extend the first delay time T 1 to a second delay time T 2 when the change controller determines that the user substantially stares at the display unit based on the user's gaze information, and wherein the change controller further determines that the user substantially stares at the display unit when the change controller detects an area of the user including the user's face from the image and a size of the area is larger than a threshold value.