# US 2014/0191929 A1 · Head mounted display and method of outputting a content using the same in which the same identical content is displayed > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191929 A1 - Document ID: US20140191929A1 - Status: Published application - Kind: A1 - Application number: 14/203,315 - Filed: 2014-03-10 - Published: 2014-07-10 - Earliest claimed: 2012-07-16 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Yongsin KIM - Web page: https://patentgrep.com/patent/US20140191929A1 ## CPC - G02B 27/017: {Head mounted} - G06F 3/012: {Head tracking input arrangements} - G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)} - G06F 3/1454: {involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay} - G02B 2027/0123: {comprising devices increasing the field of view} - G02B 2027/014: {comprising information/image processing systems} - G02B 2027/0178: {Eyeglass type (eyeglass details G02C)} - G09G 5/12: Synchronisation between the display unit and other units, e.g. other display units, video-disc players - G09G 2370/16: Use of wireless transmission of display information - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A HMD (head mounted display) and its methods are discussed. In one embodiment, the HMD includes a processor which can detect a first marker of a augmented reality image within a view angle region of the HMD, and determine a location state of the first marker, the location state including a first state in which the first marker is located within the view angle region of the HMD and a second state in which the first marker is located beyond the view angle region. When the location state of the first marker is switched from the first state to the second state, the processor can start displaying the augmented reality image on a display unit, and when the location state of the first marker is switched from the second state to the first state, the processor can stop displaying the augmented reality image on the display unit. ## Claims ### Claim 1 A HMD (head mounted display) comprising: a processor configured to control an operation of the HMD; a sensor unit configured to detect a marker of an augmented reality image; a display unit configured to output the augmented reality image based on the detected marker; and a communication unit configured to transmit and receive data with an external server, wherein the processor is further configured to: detect a first marker of a first augmented reality image within a view angle region of the HMD, determine a location state of the first marker, the location state comprising a first state in which the first marker is located within the view angle region of the HMD and a second state in which the first marker is located beyond the view angle region, when the location state of the first marker is switched from the first state to the second state, start displaying the first augmented reality image on the display unit, and when the location state of the first marker is switched from the second state to the first state, stop displaying the first augmented reality image on the display unit. ### Claim 2 (depends on 1) The HMD of claim 1, wherein the first marker is a printed image on a real object which is located within the view angle region of the HMD. ### Claim 3 (depends on 2) The HMD of claim 2, wherein the real object includes a book, a magazine, a newspaper or a photograph. ### Claim 4 (depends on 2) The HMD of claim 2, wherein the first marker includes a bar code, a QR code, a color code or an image code. ### Claim 5 (depends on 1) The HMD of claim 1, wherein the processor is further configured to receive the first augmented reality image from the external sever. ### Claim 6 (depends on 1) The HMD of claim 1, wherein the processor is further configured to stop displaying the first augmented reality image when a second marker is detected within the view angle region of the HMD. ### Claim 7 (depends on 1) The HMD of claim 1, wherein the first marker is a real object which is located within the view angle region of the HMD. ### Claim 8 (depends on 7) The HMD of claim 7, wherein the real object includes contents printed on the real object, and the first augmented reality image of the first marker includes contents which is identical with the contents of the real object. ### Claim 9 (depends on 1) The HMD of claim 1, wherein the processor is further configured to not display the first augmented reality image of the first marker while the first marker is located within the view angle region of the HMD. ### Claim 10 (depends on 1) The HMD of claim 1, wherein the processor is further configured to display the first augmented reality image of the first marker while the first marker is located beyond the view angle region of the HMD. ### Claim 11 (depends on 1) The HMD of claim 1, wherein the location state of the first marker is determined further based on eyes of a user who wears the HMD. ### Claim 12 (depends on 11) The HMD of claim 11, wherein the HMD further comprises an image photographing sensor configured to detect a position of the eyes of the user wearing the HMD. ### Claim 13 (depends on 11) The HMD of claim 11, wherein the location state of the first marker is determined based on whether the first marker is located within a view angle region of the user. ### Claim 14 A method of displaying an augmented reality image using a HMD (head mounted display), comprising: detecting a first marker of a first augmented reality image within a view angle region of the HMD; determining a location state of the first marker, the location state comprising a first state in which the first marker is located within the view angle region of the HMD and a second state in which the first marker is located beyond the view angle region; when the location state of the first marker is switched from the first state to the second state, displaying the first augmented reality image on a display unit of the HMD; and when the location state of the first marker is switched from the second state to the first state, excluding the first augmented reality image from the display unit of the HMD. ### Claim 15 (depends on 14) The method of displaying an augmented reality image of claim 14, wherein the first marker is a printed image on a real object which is located within the view angle region of the HMD. ### Claim 16 (depends on 15) The method of displaying an augmented reality image of claim 15, wherein the real object includes as book, a magazine, a newspaper or a photograph. ### Claim 17 (depends on 15) The method of displaying an augmented reality image of claim 15, wherein the first marker includes a bar code, a QR code, a color code or an image code. ### Claim 18 (depends on 14) The method of displaying an augmented reality image of claim 14, further comprising: receiving the first augmented reality image from the external sever. ### Claim 19 (depends on 14) The method of displaying an augmented reality image of claim 14, wherein the first marker is a real object which is located within the view angle region of the HMD. ### Claim 20 (depends on 19) The method of displaying an augmented reality image of claim 19, wherein the real object includes contents printed on the real object, and the first augmented reality image of the first marker includes contents which is identical with the contents of the real object. ### Claim 21 (depends on 14) The method of displaying an augmented reality image of claim 14, further comprising: terminating the first augmented reality image when a second marker is detected within the view angle region of the HMD. ### Claim 22 (depends on 14) The method of displaying an augmented reality image of claim 14, further comprising: excluding the first augmented reality image of the first marker from the display unit while the first marker is located within the view angle region of the HMD. ### Claim 23 (depends on 14) The method of displaying an augmented reality image of claim 14, further comprising: displaying the first augmented reality image of the first marker while the first marker is located beyond the view angle region of the HMD. ### Claim 24 (depends on 14) The method of displaying an augmented reality image of claim 14, wherein the location state of the first marker is determined further based on eyes of a user who wears the HMD. ### Claim 25 (depends on 24) The method of displaying an augmented reality image of claim 24, wherein the HMD further comprises an image photographing sensor configured to detect a position of the eyes of the user wearing the HMD. ### Claim 26 (depends on 24) The method of displaying an augmented reality image of claim 24, wherein the location state of the first marker is determined based on whether the first marker is located within a view angle region of the user.