Patent ID: 8427396

Claim:
A method of outputting a content using an HMD (head mounted display), the method comprising: performing a pairing with a digital device having at least one display unit configured to display a first content; detecting a location state of the paired digital device, wherein the location state comprises a first state in which a display unit of the digital device is located within a preset view angle region of the HMD and a second state in which the display unit of the digital device is not located within the preset view angle region of the HMD; when the location state is changed from the first state to the second state, receiving the first content which is displayed by the digital device and outputting the first content that is on the HMD; and when the location state is changed from the second state to the first state, determining whether a second content currently being displayed on the digital device is identical to the first content currently being output on the HMD, and terminating the output of the first content on the HMD when the second content is identical to the first content or continuing the output of the first content on the HMD when the second content is not identical to the first content, wherein the first content output on the HMD is the same identical first content displayed on the digital device without changing a spatial dimension and without augmenting a reality of the first content displayed on the digital device.