# Patent

## Title
Head mounted display and method of controlling therefor

## Abstract

The present specification relates to a head mounted display (HMD) and a method of controlling therefor, and more particularly, to a method of updating information displayed in the HMD by recognizing opening and closing of eyes of a user wearing the HMD.

## Background
This application claims the benefit of the Korean Patent Application No. 10-2013-0102326, filed on Aug. 28, 2013, which is hereby incorporated by reference as if fully set forth herein.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present specification relates to a head mounted display (HMD) and a method of controlling therefor, and more particularly, to a method of updating information displayed in the HMD by recognizing opening and closing of eyes of a user wearing the HMD.
2. Discussion of the Related Art
Generally, a head mounted display indicates various digital devices enabling a user to receive a multimedia content in a manner of being mounted on the head of the user like glasses. According to a trend of lightening and miniaturizing of a digital device, various wearable computers have been developed so far and the HMD is also widely used. The HMD can provide various conveniences as well as a simple display function to a user in a manner of being combined with an augmented reality technology and an N screen technology.
In case of occurring such update information as a short message service (SMS), a user wearing an HMD can recognize the update information via the HMD without checking such a mobile device as a smartphone. For instance, in case of occurring such an event as a time change, a weather change, a date change, a telephone reception, and the like, the HMD can recognize the occurrence of the event in a state that a user wears the HMD.
SUMMARY OF THE INVENTION
Accordingly, the present specification is directed to an apparatus and method thereof that substantially obviate one or more problems due to limitations and disadvantages of the related art.
According to one embodiment, an HMD intends to provide various updates according to a type of object displayed in a display unit.
According to a different embodiment, an HMD intends to provide an update of an object displayed in a display unit according to a state of eyes-opened/eyes-closed of a user wearing the HMD.
According to a different embodiment, an HMD intends to provide each update of objects according to a state of eyes-opened/eyes-closed of a user wearing the HMD and a type of object displayed in a display unit, respectively.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, according to one embodiment, a head mounted display (HMD) includes a display unit configured to display an image, a camera unit configured to recognize opening/closing of eyes of a user wearing the HMD, a communication unit configured to transmit/receive data, and a processor configured to control the display unit, the camera unit, and the communication unit, wherein the processor is further configured to detect generation of an event, determine whether the event corresponds to a first update information, recognize a condition to update a first object corresponding to the first update information when the event corresponds to the first update information, wherein the condition comprises a first condition that the user closes the eyes and a second condition that the user opens the eyes, and, update the first object corresponding to the first update information when the recognized condition corresponds to the first condition.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, according to a different embodiment, a method of controlling a head mounted display (HMD) includes the steps of detecting generation of an event, determining whether the event corresponds to a first update information, recognizing a condition to update a first object corresponding to the first update information when the event corresponds to the first update information, wherein the condition comprises a first condition that the user closes the eyes and a second condition that the user opens the eyes, and updating the first object corresponding to the first update information when the recognized condition corresponds to the first condition.
According to one embodiment, an HMD can reduce a sense of fatigue of eyes resulted from updating an object in a state of eyes-opened of a user by updating such a frequently updated object as time, weather, and the like in a state of eyes-closed of the user.
According to a different embodiment, an HMD can easily recognize an event to be recognized by a user in a state of eyes-opened of the user by updating such an object as a message reception, an alarm reception, and the like in the state of eyes-opened of the user.
According to a different embodiment, since an update of an object in an HMD occurs after a predetermined time elapses after an event occurs in a condition of opening/closing eyes of a user, an HMD can handle an immediate change of a state of eyes-opened of the user.
More detail advantageous effect of the invention shall be described in detail in the following description.
It is to be understood that both the foregoing general description and the following detailed description of the present specification are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.



BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:
FIG. 1 is a block diagram of a head mounted display (HMD) according to the present specification;
FIG. 2 is a diagram of an eye condition of a user wearing a head mounted display (HMD) according to the present specification;
FIG. 3 is a diagram for a first embodiment of a method of controlling a head mounted display (HMD) according to the present specification;
FIG. 4 is a diagram for a second embodiment of a method of controlling a head mounted display (HMD) according to the present specification;
FIG. 5 is a diagram for a third embodiment of a method of controlling a head mounted display (HMD) according to the present specification;
FIG. 6 is a diagram for a fourth embodiment of a method of controlling a head mounted display (HMD) according to the present specification;
FIG. 7 is a diagram for a fifth embodiment of a method of controlling a head mounted display (HMD) according to the present specification;
FIG. 8a and FIG. 8b is a diagram for a sixth embodiment of a method of controlling a head mounted display (HMD) according to the present specification;
FIG. 9a and FIG. 9b is a diagram for a seventh embodiment of a method of controlling a head mounted display (HMD) according to the present specification;
FIG. 10a and FIG. 10b indicates a flowchart of a method of controlling a head mounted display (HMD) according to the present specification.



DETAILED DESCRIPTION OF THE INVENTION
Although terminologies used in the present specification are selected from general terminologies used currently and widely in consideration of functions, they may be changed in accordance with intentions of technicians engaged in the corresponding fields, customs, advents of new technologies and the like. Occasionally, some terminologies may be arbitrarily selected by the applicant(s). In this case, the meanings of the arbitrarily selected terminologies shall be described in the corresponding part of the detailed description of the specification. Therefore, terminologies used in the present specification need to be construed based on the substantial meanings of the corresponding terminologies and the overall matters disclosed in the present specification rather than construed as simple names of the terminologies.
Moreover, while the embodiments have been concretely described with reference to the attached diagrams and the contents written on the diagrams, the present specification may be non-restricted or non-limited to the embodiments.
FIG. 1 is a block diagram of a head mounted display (HMD) according to the present specification. Yet, FIG. 1 is just one embodiment and a part of configuring module can be deleted or a new configuring module can be added according to the necessity of those skilled in the art.
As depicted in FIG. 1, an HMD 100 can include a display unit 110, a camera unit 120, a communication unit 130, and a processor 140.
The display unit 110 can output an image in a display screen. And, the display unit 110 can output an image based on content executed by the processor 140 or a control command of the processor 140.
Meanwhile, in the present specification, the HMD 100 can output an image in the display screen in various modes. In one embodiment, the HMD 100 can output an image in a see-through mode. In this case, the see-through mode indicates that the display screen is transparent. The see-through mode indicates a mode capable of using content while a user wearing the HMD 100 is recognizing the surrounding environment. In another embodiment, the HMD 100 can output an image in a front-light mode. In this case, the front-light mode indicates a mode capable of displaying an image to which a light is reflected without directly projecting to eyes via such a reflector as a mirror.
And, in another embodiment, the HMD 100 can output an image in a see-closed mode. In this case, the see-closed mode indicates a mode not capable of seeing an external environment via the display screen and capable of using contents via the display screen. The present specification is explained under an assumption that the HMD 100 displays an image in the see-through mode or the front-light mode.
The camera unit 120 can take a picture of an image. More specifically, the camera unit 120 can take a picture of an image of a front direction. In this case, the front direction may indicate a direction at which the camera unit 120 faces. And, the camera unit 120 senses an image within an angle of view area and can provide the image to the processor 140. In this case, the angle of view area indicates a range of a horizontal and vertical viewing angle capable of being included in a prescribed screen in case of sensing an image.
In the present specification, the camera unit 120 can be positioned at an outside or an inside of the HMD 100. In case that the camera unit 120 is positioned at the outside of the HMD 100, the camera unit 120 can sense an image of a front direction of the HMD 100. And, in case that the camera unit 120 is positioned at the inside of the HMD 100, the camera unit 120 can sense opening and closing of eyes of a user.
The communication unit 130 performs a communication with an external device using various protocols and can transceive a data with the external device using the various protocols. And, the communication unit 130 can transceive such a digital data as content and the like by accessing a network in wired or wireless. For instance, the communication unit 130 can use such a communication standard as WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), and the like to access a wireless network.
In the present specification, the communication unit 130 can transmit/receive a data. More specifically, the communication unit 130 can receive an event occurrence for the HMD 100. For instance, an occurred event may include a time change, a date change, a weather change, e-mail reception, an SNS (social network service) update, SMS reception, and the like.
The processor 140 processes a data, controls each of the units of the aforementioned mobile device 100, and can control data transmission/reception between units.
In the present specification, the processor 140 can detect an event generation. And, the processor 140 can determine whether an event corresponds to first update information. If the event corresponds to the first update information, the processor 140 can recognize a condition to update a first object corresponding to the first update information. And, if a recognized condition corresponds to a first condition, the processor 140 can update the first object corresponding to the first update information. Regarding this, it shall be described in detail in FIG. 3 to FIG. 9.
As an embodiment of the present specification, operations performed by the HMD 100 can be controlled by the processor 140. For clarity, in the following description and diagrams, these operations are commonly depicted and explained in a manner that the HMD 100 performs/controls the operations.
Meanwhile, although it is not depicted in FIG. 1, the HMD 100 can include a sensor unit, a power unit, a storage unit, and the like. The sensor unit senses a surrounding environment of the device using at least one sensor installed in the HMD 100 and can deliver a sensed result to the processor 140 in a signal form.
The power unit is a power source connected to an internal battery or an external power supply of the HMD 100. The power unit can supply power to the HMD 100. And, the storage unit can store such various digital data as an audio, a picture, a video, an application, and the like. The storage unit may indicate such various digital data storage spaces as a flash memory, RAM (random access memory), SSD (solid state drive), and the like.
The HMD 100 depicted in FIG. 1 is a block diagram according to one embodiment. Blocks represented in a manner of being separated indicate the logically distinguished elements of the HMD 100. Hence, the elements of the aforementioned HMD 100 can be equipped with a single chip or a plurality of chips according to the design of the device.
FIG. 2 is a diagram of an eye condition of a user wearing a head mounted display (HMD) according to the present specification. More specifically, FIG. 2 (a) indicates a case that a user wearing the HMD 100 is in a state of eyes-opened and FIG. 2 (b) indicates a case that the user wearing the HMD 100 is in a state of eyes-closed.
The HMD 100 can perform a related function in a manner of recognizing eyes-opened/eyes-closed state of a user via the camera unit installed in the HMD 100. For instance, the HMD 100 can activate/deactivate the display unit by recognizing the eyes-opened/eyes-closed state of the user and can execute/does not execute a specific application of the HMD 100. The present specification explains that the HMD 100 updates various objects according to the state of eyes-opened/eyes-closed of the user.
In one embodiment, as depicted in FIG. 2 (a), the HMD 100 can update second update information for a second object in a state of eyes-opened of the user. In this case, the state of eyes-opened may include a case that the HMD 100 can recognize a gaze of the user 10 for the display unit as well as a case that the user 10 sees a front side.
In this case, the second object may correspond to information on an occurred event needed to be informed to the user 10. For instance, the second object can include an e-mail object, an SNS object, an SMS object, a telephone object, an alarm object, and the like. And, the second update information on the second object may correspond to information of relatively high importance compared to the information updated in a state of eyes-closed. In particular, the update for the second object may correspond to a case that the user 10 needs to recognize the update in the state of eyes-opened of the user 10. And, the second update information can occur when an event for the second object occurs only.
In another embodiment, in the state of eyes-closed of the user depicted in FIG. 2 (b), the HMD 100 can update first update information for a first object. In this case, the state of eyes-closed may include a state of temporarily closing eyes while the user blinks eyes as well as a state of closing eyes for a predetermined time.
In this case, the first object may correspond to an object continuously displayed in the display unit or an object frequently displayed in the display unit. For instance, the first object may include a time object, a weather object, a battery object, and the like. And, since the first update information on the first object is updated in the state of eyes-closed, the first update information may correspond to the information of a relatively low importance compared to the information updated in the state of eyes-opened. And, the first update information can be periodically generated according to a predetermined time interval.
In the following FIG. 3 to FIG. 9, a method of updating update information, which is updated by the HMD 100 mounted on a user, is described according to the state of eyes-opened/eyes-closed of the user and a type of an occurred event.
FIG. 3 is a diagram for a first embodiment of a method of controlling a head mounted display (HMD) according to the present specification. More specifically, FIG. 3 indicates a case that first update information is updated in the state of eyes-closed of a user 10.
As depicted in FIG. 3, the HMD 100 can detect a generation of an event. In this case, the HMD 100 may be in a state of being worn by the user 10. In this case, the event may correspond to information occurred to update an object displayed in the display unit 110 or an object to be displayed in the display unit. For instance, the generated event may include a time change, a weather change, a telephone reception, a message reception, an alarm reception, and the like. In the FIG. 3, the generated event corresponds to the time change, i.e., ‘one minute elapse’.
And, the HMD 100 can determine whether the generated event is the first update information. As mentioned earlier in FIG. 2, the first update information is information configured to update the first object and may correspond to the information of a relatively low importance compared to the information updated in the state of eyes-opened. For instance, the first update information may include weather update information, time update information, battery update information, and the like. In FIG. 3, the generated event is a change of time from ‘8:40 AM’ to ‘8:41 AM’. Hence, the generated event may correspond to the first update information.
Meanwhile, if an event corresponds to the first update information, the HMD 100 can recognize a condition to update a first object 20 corresponding to the first update information. In this case, the condition to update the first object 20 corresponds to eyes 11 status of a user 10. For instance, the condition to update the first object 20 can include a first condition that the user 10 closes the eyes 11 and a second condition that the user 10 opens the eyes 11. And, the first object may correspond to a target object to update the first update information. For instance, the first object may include a time object, a weather object, a battery object, and the like. Referring to FIG. 3, when the first update information occurs, the HMD 100 can recognize it as the first condition that the user 10 closes the eyes 11.
And, if a recognized condition corresponds to the first condition, the HMD 100 can update the first object 20 corresponding to the first update information. And, the HMD 100 can display the updated first object 20 in the display unit 110. Referring to FIG. 3, since the eyes 11 of the user 10 correspond to the first condition when one minute elapses, the HMD 100 can update the time object, which is the first object, from ‘8:40 AM’ to ‘8:41 AM’. And, referring to FIG. 3, the HMD 100 can display ‘8:41 AM’, which is an updated state of the first object, in the display unit 110. By doing so, if the user 10 opens the users' eyes later, the user can recognize the first object updated to ‘8:41 AM’. In particular, according to the present specification, the user 10 does not need to see that the time is updated on every one minute in the state of eyes-opened.
As mentioned earlier in the embodiment of FIG. 3, in case of a frequently updated object such as time, the HMD 100 updates the object in the state of eyes-closed, thereby reducing a sense of fatigue of the eyes of the user 10.
FIG. 4 is a diagram for a second embodiment of a method of controlling a head mounted display (HMD) according to the present specification. More specifically, FIG. 4 indicates a case that the first update information is updated in the state of eyes-opened of the user 10.
As depicted in FIG. 4, the HMD 100 can detect a generation of an event. Referring to FIG. 4, the generated event may correspond to a time change. And, the HMD 100 can determine whether the event is first update information. Referring to FIG. 4, the generated event is a change of time from ‘8:40 AM’ to ‘8:41 AM’. Hence, the generated event may correspond to the first update information.
And, if an event corresponds to the first update information, the HMD 100 can recognize a condition to update a first object 20 corresponding to the first update information. Referring to FIG. 4, when the first update information occurs, the HMD 100 can recognize it as a second condition that the user 10 opens the eyes 11.
Hence, if a recognized condition corresponds to the second condition, the HMD 100 can stop updating the first object 20 corresponding to the first update information until the recognized condition is switched from the second condition to the first condition. More specifically, if the user is in the state of eyes-opened when the first update information occurs, the HMD 100 can stop updating the first object corresponding to the first update information until the user 10 is switched to the state of eyes-closed.
Referring to FIG. 4, when one minute elapsed, since the eyes 11 of the user 10 is in the state of eyes-opened, the HMD 100 does not perform an update of the first object 20. This is because if the user 10 recognizes the time change on every minute in the state of eyes-opened, it may give a sense of fatigue and confusion to the eyes of the user. Hence, the HMD 100 updates the time object of the display unit 100 to ‘8:41 AM’ when the state of eyes-opened of the user 10 is shifted to the state of eyes-closed of the user 10 and can display ‘8:41 AM’ in the display unit 110.
Referring to the embodiment of FIG. 4, in case of a frequently updated object such as time, although an update occurs, the HMD 100 does not update in the state of eyes-opened. Instead, the HMD updates in the state of eyes-opened, thereby reducing a sense of fatigue of the eyes of the user 10.
Meanwhile, unlike the aforementioned in FIG. 4, if recognized condition corresponds to a second condition and the recognized condition is not switched to the first condition until a predetermined time elapses, the HMD 100 can update the first object corresponding to the first update information. In particular, if the user does not close the user's eyes until the time ‘8:40 AM’ reaches to ‘8:42 AM’ in a manner of elapsing ‘8:41 AM’, the HMD 100 can update the first object to ‘8:42 AM’. This is because if the state of eyes-opened of the user 10 is maintained for a long time, since the first update information, which is supposed to be updated, may be accumulated, the user 10 may be confused on the time later.
FIG. 5 is a diagram for a third embodiment of a method of controlling a head mounted display (HMD) according to the present specification. More specifically, FIG. 5 indicates a case that second update information is updated in the state of eyes-opened of the user 10.
As depicted in FIG. 5, the HMD 100 can detect a generation of an event. In FIG. 5, the generated event corresponds to a message reception.
And, the HMD 100 can determine whether the event corresponds to first update information. In FIG. 5, the generated event corresponds to the message reception and does not correspond to the first update information aforementioned in FIG. 2. In this case, the HMD 100 can determine whether the event correspond to a second update information. As mentioned earlier in FIG. 2, the second update information is information to update a second object and may correspond to the information of a relatively high importance compared to the information updated in the state of eyes-closed. For instance, the second update information can include an e-mail reception, an SNS reception, an SMS reception, an alarm reception, and the like. In FIG. 5, the generated event corresponds to the SMS reception and may correspond to the second update information.
Meanwhile, if the event corresponds to the second update information, the HMD 100 can recognize a condition to update a second object 30 corresponding to the second update information. In this case, the condition to update the second object 30 may indicate eyes 11 status of the user 10. For instance, the condition to update the second object may include a first condition that the user 10 closes the user's eyes 11 and a second condition that the user 10 opens the user's eyes 11. In FIG. 5, when the second update information occurs, the HMD 100 can recognize it as the second condition that the user 10 opens the user's eyes 11. And, the second object 30 may correspond to a target object to update the second update information. For instance, the second object can include an e-mail object, an SNS object, an SMS object, an alarm object, and the like.
Meanwhile, unlike the first object, the second object may not always be displayed in the display unit 110. In particular, the second object can be displayed in the display unit 110 when the second update information occurs or when the user 10 activates the second object only.
Hence, if a recognized condition corresponds to the second condition, the HMD 100 can update the second object corresponding to the second update information. And, the HMD 100 can display the updated second object in the display unit 110. In FIG. 5, since the eyes of the user correspond to the second condition when an SMS is received, the HMD 100 can update an SMS object, which is the second object. And, in FIG. 5, the HMD 100 can display a received SMS message ‘How are you?’ which is an updated state of the second object, in the display unit 110.
Referring to the embodiment of FIG. 5, the HMD 100 can make the user 10 easily recognize an event occurrence in a manner of updating not an object regularly updated but an object updated on a specific event in the state of eyes-opened of the user 10.
FIG. 6 is a diagram for a fourth embodiment of a method of controlling a head mounted display (HMD) according to the present specification. More specifically, FIG. 6 indicates a case that second update information is updated in the state of eyes-closed of the user 10.
As depicted in FIG. 6, the HMD 100 can detect a generation of an event. In FIG. 6, the generated event corresponds to an SMS reception. Subsequently, the HMD 100 determines whether the generated event is first update information. If the generated event is not the first update information, the HMD determines whether the generated event is second update information. In FIG. 6, the generated event corresponds to the ‘SMS reception’ and may correspond to the second update information.
And, if the event corresponds to the second update information, the HMD 100 can recognize a condition to update a second object 30 corresponding to the second update information. In FIG. 6, when the second information occurs, the HMD 100 can recognize it as a first condition that the user 10 closes the user's eyes 11.
In this case, if a recognized condition corresponds to the first condition, the HMD 100 can stop updating of the second object 30 corresponding to the second update information until the recognized condition is switched to the second condition form the first condition. In FIG. 6, since the eyes 11 of the user 10 is in the state of eyes-closed when the SMS is received, the HMD 100 does not perform the update of the second object 30. And, when the eyes of the user is in the state of eyes-opened, the HMD 100 updates the SMS object and can display ‘How are you?’ message in the display unit 110.
Referring to the embodiment of FIG. 6, in case of an event, which is supposed to be recognized by the user 10, the HMD 100 updates the event in the state of eyes-opened of the user 10, thereby easily recognizing the occurred event by the user 10.
Meanwhile, unlike the aforementioned in FIG. 6, if the recognized condition corresponds to a first condition and the first condition is not switched to a second condition until a predetermined time elapses, the HMD 100 can update a second object corresponding to second update information. And, the HMD 100 can inform the user 10 of the update of the second object via a vibration, a sound and the like in the state of the first condition. In particular, if the user 10 do not open the user's eyes until a predetermined time elapses after ‘How are you?’ message is received, the HMD 100 can inform the user of the ‘How are you?’ message received in the second object by such a means as a vibration and a sound. This is because if the state of eyes-closed of the user 10 is maintained for a long time, since plurality of the second update information occur, it is intended to inform the user that the second update information has arrived by such a means as a vibration and a sound.
FIG. 7 is a diagram for a fifth embodiment of a method of controlling a head mounted display (HMD) according to the present specification. More specifically, FIG. 7 indicates that plurality of second update information is updated in the state of eyes-opened of the user 10. And, the second embodiment indicates a case that plurality of the second update information is generated in a second condition.
In one embodiment, the HMD 100 can update plurality of second update information and display second update information on a first event among plurality of generated events in the display unit 110. In this case, plurality of the generated second update information may correspond to a case that a sending address of an event is identical to each other. This is because if a plurality of messages are sent from an identical person, if a message reception is informed to the user, it is not necessary to show all of a plurality of the messages to the user 10.
As depicted in FIG. 7, plurality of the second update information corresponds to update information on ‘SMS object’, which is a second object and can include 4 update information. And, in FIG. 7, plurality of the second update information has an identical sending address, which is ‘Tim’. Hence, the HMD 100 updates all of plurality of the second information and displays ‘How are you’, which is the second update information on the first event, in the display unit 110. The remaining second update information can be represented by a number only.
In another embodiment, the HMD 100 can update plurality of the second update information and sequentially display plurality of the generated second update information in the display unit 110. In this case, plurality of the generated second update information may have a sending address of an event different from each other. This is because in case of a plurality of messages sent from a person different from each other, it is necessary to inform the user 10 that each message is received from a person different from each other.
Although it is not depicted in FIG. 7, if plurality of the second update information is detected, the HMD 100 can display plurality of the second update information in the display unit 110 in an order of being detected.
FIG. 8 is a diagram for a sixth embodiment of a method of controlling a head mounted display (HMD) according to the present specification. More specifically, FIG. 8a indicates that first update information is updated in the state of eyes-closed of the user 10 and FIG. 8b indicates that the first update information is updated in the state of eyes-opened of the user 10. Yet, FIG. 8a and FIG. 8b indicates a case that the first update information is generated and then the first object is updated after a first time (T1) elapsed.
First of all, referring to FIG. 8a, the HMD 100 can recognize that the user 10 sees a first object 20 displayed in the display unit 110 in the state of eyes-opened on a timing point A. And, a time object displayed in the display unit 110 on the timing point A corresponds to ‘8:40 AM’.
Meanwhile, the HMD 100 can detect an event on a timing point B. In this case, the event corresponds to a change of time from ‘8:40 AM’ to ‘8:41 AM’ and may correspond to the first update information.
And, the HMD 100 can recognize the state of eyes-closed of the user 10 as a condition to update the first object 20 corresponding to the first update information on the timing point B. And, if the HMD 100 recognizes the state of eyes-closed of the user 10 on a timing point C of which a first time (T1) elapses from the timing point B, the first update information can be updated in the first object 20. In this case, the first time (T1) corresponds to a predetermined time and indicates a time taken from an occurrence of the first update information to a practical update of the first update information.
In this case, when the first condition to update the first object 20 corresponding to the first update information after an event has occurred, the HMD 100 may not directly update the first object 20. In particular, the HMD 100 can update the first object 20 after the first time (T1) elapses from the occurrence of the event in the first condition. This is because if the first condition is changed to the second condition, which is the state of eyes-opened, before the first time (T1) elapses from the occurrence of the update information, it is not necessary to update the first object.
Subsequently, referring to FIG. 8b, since the timing point A and the timing point B are identical to those of FIG. 8a, explanation on the timing point A and the timing point B is omitted. The HMD 100 can recognize a second condition, which corresponds to the state of eyes-opened of the user 10, on the timing point C of which the first time (T1) elapses from the timing point B. In this case, unlike the aforementioned in FIG. 8a, the HMD 100 does not update the first update information in the first object 20 on the timing point of C.
In particular, the HMD 100 can update the first update information in the first object on a timing point D, which is a timing point that the eyes of the user correspond to the first condition again. This is because if the first object 20 is updated in the second condition, it may give a sense of fatigue to the eyes 11 of the user 10. Hence, the first object 20 is updated when the eyes of the user correspond to the first condition again.
FIG. 9 is a diagram for a seventh embodiment of a method of controlling a head mounted display (HMD) according to the present specification. More specifically, FIG. 9a indicates that the second update information is updated in the state of eyes-opened of the user 10 and FIG. 9b indicates that the second update information is updated in the state of eyes-closed of the user 10. Yet, FIG. 9a and FIG. 9b indicates a case that the second update information is generated and then the second object is updated after a second time (T2) elapsed.
First of all, referring to FIG. 9a, the HMD 100 can recognize that the user 10 sees the first object 20 displayed in the display unit 110 in the state of eyes-opened of the user 10 on the timing point A. In this case, the first object 20 can always be displayed in the display unit 110 irrespective of an occurrence of an event. On the contrary, the second object 30 can be displayed in the display unit 110 when an event occurs only.
Meanwhile, the HMD 100 can detect an event on the timing point of B. In this case, the event may correspond to an SMS reception. If the event is not the first update information, the HMD 100 can determine whether the event corresponds to the second update information. In FIG. 9a, the message reception event corresponds to the second update information. And, the HMD 100 can recognize the state of eyes-opened of the user 10 as a condition to update the second update information on the timing point of B. If the state of eyes-opened of the user 10 is recognized on the timing point of C of which the second time (T2) elapses from the timing point B, the HMD 100 can update the second update information in the second object 30. In this case, the second time (T2) corresponds to a predetermined time and indicates a time taken from an occurrence of the second update information to a practical update of the second update information. And, since it is necessary for the second time (T2) to immediately inform the user of an event occurrence, the second time may correspond to a short time less than 0.1 second.
In this case, when the second condition to update the second object 30 corresponding to the second update information after an event has occurred, the HMD 100 may not directly update the second object 30 on the timing point of B. In particular, the HMD 100 can update the second object 30 after the second time (T2) elapses from the occurrence of the event in the second condition. This is because if the second condition is changed to the first condition, which is the state of eyes-closed, before the second time (T2) elapses from the occurrence of the update information in the second condition, it is not necessary to update the second object.
Subsequently, referring to FIG. 9b, since the timing point A and the timing point B are identical to those of FIG. 9a, explanation on the timing point A and the timing point B is omitted. The HMD 100 can recognize a first condition, which corresponds to the state of eyes-closed of the user 10, on the timing point C of which the second time (T2) elapses from the timing point B. In this case, unlike the aforementioned in FIG. 9a, the HMD 100 does not update the second update information in the second object 20 on the timing point of C.
In particular, the HMD 100 can update the second update information in the second object 30 on a timing point D, which is a timing point that the eyes 11 of the user 10 correspond to the second condition again. This is because if the second object 30 is updated in the first condition, it may not recognize an event although the event, which is supposed to be recognized by the user 10, has occurred.
FIG. 10 indicates a flowchart of a method of controlling a head mounted display (HMD) according to the present specification. Each step of FIG. 10a and FIG. 10b explained in the following description can be controlled by the processor 140 of the HMD 140 depicted in FIG. 1.
First of all, the HMD 140 can detect a generation of an event [S1010]. As mentioned earlier in FIG. 3, the event may correspond to information occurred to update an object displayed or to be displayed in the display unit 110. For instance, the generated event may include a time change, a weather change, a telephone reception, a message reception, and the like.
Subsequently, the HMD can determine whether the generated event corresponds to first update information [S1020]. As mentioned earlier in FIG. 3, the first update information may correspond to information to update a first object. For instance, the first update information may include a weather update, a time update, a battery update, and the like.
In the step S1020, if the generated event corresponds to the first update information, the HMD can recognize a condition to update the first object corresponding to the first update information [S1030]. In this case, the condition to update the first object corresponds to an eyes status of the user. For instance, the condition to update the first object may include a first condition that the user closes the user's eyes and a second condition that the user opens the user's eyes.
Subsequently, the HMD can determine whether a recognized condition corresponds to the first condition or the second condition [S1040]. The HMD can recognize/determine a state of eyes-opened and a state of eyes-closed of the user by a camera installed in the HMD.
In the step S1040, if the recognized condition corresponds to the first condition, the HMD can update the first object corresponding to the first update information [S1050]. In particular, as mentioned earlier in FIG. 3, the HMD can update the first object such as the time object in the state of eyes-closed of the user. And, the HMD displays the updated first object in the display unit and makes the user recognize the updated first object in the state of eyes-opened of the user.
In the step S1040, if the recognized condition corresponds to the second condition, the HMD can stop updating the first object corresponding to the first update information until the recognized condition is switched to the first condition from the second condition [S1060]. In particular, as mentioned earlier in FIG. 4, the HMD stops updating of the first object in the state of eyes-opened of the user and can update the first object in a next first condition.
Meanwhile, in the step S1020, if the generated event does not correspond to the first update information, the HMD can determine whether the generated event corresponds to second update information [S1070]. As mentioned earlier in FIG. 5, the second update information may correspond to information to update a second object. For instance, the second update information can include an e-mail reception, an SMS reception, an SNS update, and the like.
In the step S1070, if the generated event corresponds to the second update information, the HMD can recognize a condition to update the second object corresponding to the second update information [S1080]. Subsequently, the HMD can determine whether the recognized condition corresponds to a first condition or a second condition [S1090].
In the step S1090, if the recognized condition corresponds to the first condition, the HMD can stop updating the second object corresponding to the second update information until the recognized condition is switched to the second condition from the first condition [S1100]. In particular, as mentioned earlier in FIG. 6, the HMD can stop updating the second object in the state of eyes-closed of the user and can update the second object in a next second condition.
In the step of S1090, if the recognized condition corresponds to the second condition, the HMD can update the second object corresponding to the second update information [S1110]. In particular, as mentioned earlier in FIG. 5, the HMD can update the second object such as the SMS object in the state of eyes-opened of the user. And, the HMD displays the updated second object in the display unit and makes the user recognize that the second object is updated.
For clarity of explanation, each diagram is explained in a manner of being divided. Yet, it is possible to design a new embodiment to implement the new embodiment by combining the embodiments, which are described in each of the diagrams. And, according to the necessity of those skilled in the art, designing a recording media readable by the computer, which has recorded a program for executing the previously explained embodiments, also belongs to a scope of a right.
A head mounted display and a method of controlling therefor according to the present specification may not limitedly apply to the composition and method of the aforementioned embodiments. The aforementioned embodiments may be configured in a manner of being selectively combined the whole of the embodiments or a part of the embodiments to achieve various modifications.
Meanwhile, a head mounted display according to the present specification and a method of controlling therefor can be implemented with a code readable by a processor in a recording media readable by the processor, which is equipped in a network device. The recording media readable by the processor may include all kinds of recording devices for storing data capable of being read by the processor. The examples of the recording media readable by the processor may include a ROM, a RAM, a magnetic tape, a floppy disc, an optical data storing device and the like. And, to implement in a form of a carrier wave such as a transmission via the internet and the like is also included. And, since the recording media readable by the processor are distributed to the computers connected by a network, codes readable by the processor can be stored and executed in a manner of being distributed.
While the present specification has been described and illustrated herein with reference to the preferred embodiments and diagrams thereof, the present specification may be non-limited to the aforementioned embodiments and it will be apparent to those skilled in the art that various modifications and variations can be made therein without departing from the spirit and scope of the present specification. Thus, it is intended that the present specification covers the modifications and variations of this invention that come within the scope of the appended claims and their equivalents.
And, both an apparatus invention and a method invention are explained in the present specification and the explanation on the both of the inventions can be complementally applied, if necessary.

## Claims

1. A head mounted display (HMD), comprising:
a display unit configured to display an image;
a camera unit configured to recognize opening/closing of eyes of a user wearing the HMD;
a communication unit configured to transmit/receive data; and
a processor configured to control the display unit, the camera unit, and the communication unit,
the processor is further configured to:
detect generation of an event,
determine whether the event corresponds to a first update information or a second update information,
recognize a condition to update a first object corresponding to the first update information when the event corresponds to the first update information or to update a second object corresponding to the second update information when the event corresponds to the second update information, wherein the first update information is updated in a first condition that the user closes the eyes and the second update information is updated in a second condition that the user opens the eyes, the first update information and the second update information being different,
update the first object corresponding to the first update information in the first condition, and
update the second object corresponding to the second update information in the second condition.

2. The head mounted display of claim 1, wherein if the recognized condition corresponds to the second condition, the processor is further configured to stop updating of the first object corresponding to the first update information until the recognized condition is switched to the first condition from the second condition.

3. The head mounted display of claim 2, wherein the processor is further configured to update the first object corresponding to the first update information when the recognized condition corresponds to the second condition and is not switched to the first condition until a third time elapses.

4. The head mounted display of claim 1, wherein if the recognized condition corresponds to the first condition, the processor is further configured to stop updating of the second object corresponding to the second update information until the recognized condition is switched to the second condition from the first condition.

5. The head mounted display of claim 4, wherein the first object and the second object are classified according to an order of importance of the generated event.

6. The head mounted display of claim 5, wherein the first object comprises time, weather, and a battery and the second object comprises an alarm, a mail, and a message.

7. The head mounted display of claim 5, wherein the first update information corresponds to information periodically generated according to a predetermined time interval and the second update information corresponds to information generated when an event for the second object occurs.

8. The head mounted display of claim 4, wherein the processor is further configured to update the second object corresponding to the second update information when the recognized condition corresponds to the first condition and is not switched to the second condition until a fourth time elapses.

9. The head mounted display of claim 1, wherein the processor is further configured to display an updated first object when the event corresponds to the first update information and the recognized condition corresponds to the first condition, and
display an updated second object when the event corresponds to the second update information and the recognized condition corresponds to the second condition.

10. The head mounted display of claim 1, wherein the processor is further configured to update a plurality of the second update information in the second object and display second update information on a first event among a plurality of generated events in the second object when generation of a plurality of second update information is detected continuously and the recognized condition corresponds to the second condition.

11. The head mounted display of claim 10, wherein the plurality of the generated second update information comprise a sending address of the event identical to each other.

12. The head mounted display of claim 1, wherein the processor is further configured to update plurality of the second update information in the second object and sequentially display a plurality of updated second objects when generation of a plurality of second update information is detected continuously and the recognized condition corresponds to the second condition.

13. The head mounted display of claim 12, wherein a plurality of the generated second update information comprise a sending address of the event different from each other.

14. The head mounted display of claim 1, wherein updating the first object corresponding to the first update information is updating the first object after when the first update information is generated and a first time has elapsed at the first condition.

15. The head mounted display of claim 14, wherein the processor is further configured to update the first object corresponding to the first update information in a proceeding first condition of the first condition when after the first time at the first condition corresponds to the second condition.

16. The head mounted display of claim 1, wherein updating the second object corresponding to the second update information is updating the second object after when the second update information is generated and a second time has elapsed at the second condition.

17. The head mounted display of claim 16, wherein the processor is further configured to update the second object corresponding to the second update information in a proceeding second condition of the second condition when after the second time at the second condition corresponds to the first condition.

18. The head mounted display of claim 1, wherein the first condition comprises a blink of the user.

19. A method of controlling a head mounted display (HMD), the method comprising:
detecting generation of an event;
determining whether the event corresponds to a first update information or a second update information;
recognizing a condition to update a first object corresponding to the first update information when the event corresponds to the first update information or to update a second object corresponding to the second update information when the event corresponds to the second update information, wherein the first update information is updated in a first condition that the user closes the eyes and the second update information is updated in a second condition that the user opens the eyes, the first update information and the second update information being different;
updating the first object corresponding to the first update information in the first condition; and
updating the second object corresponding to the second update information in the second condition.