JP2004096224A - Power supply control method and head mount device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head mount device such as a head mount display for effectively preventing wasteful power consumption while the device is not in use. <P>SOLUTION: Sensors 11, 12 fitted to a head or the like of a living body sense a motion of the living body, sense a direction in which the living body is directed or a position of the living body on the basis of sensed motion data, the head mount device performs processing on the basis of the sensed direction or position, when a state of sensing no motion of the living body is consecutive for a prescribed time or over on the basis of the motion data outputted from the sensors, the power supply is automatically shut off in response to control or the like of a power switch 19a so that the head mount device performs excellent power supply control with a simple configuration without the need for an exclusive sensor for sensing no mount device. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a head mount device suitable for application to, for example, a head mount display mounted on the head of a human body, and a power supply control method applied to this type of device.
[0002]
[Prior art]
In recent years, a sensor that detects a three-dimensional direction in which a human head is facing with a sensor, and displays an image of the detected direction on a head-mounted display (HMD) mounted on the head, It is called virtual reality and has been put to practical use.
[0003]
FIG. 9 is a diagram illustrating a configuration example of a conventional head mounted display. In this example, the sensor unit 70 detects the movement of the head, a head mounted display unit 80 attached to the head, and a host unit 90 that supplies a video signal to the video display unit 83. The sensor unit 70 includes three sensors 71, 72, 73 for three-dimensionally detecting the movement of the human head, and a three-dimensional human head based on the outputs of the sensors 71, 72, 73. The control unit 74 includes a central control unit 74 for calculating the movement, and a control interface unit 75 for transmitting data calculated by the central control unit 74 in the head-facing direction to the host unit 90.
[0004]
The three sensors 71, 72, and 73 are, for example, angular velocity sensors that individually detect acceleration in three axial directions that are orthogonal to each other. When the central control unit 74 determines three-axis acceleration, Judge dimensional movement.
[0005]
The host unit 90 reads, for example, a memory 91 for storing video data of the entire circumference around a certain point, and reads video data in the direction detected by the sensor unit 70 from the video data stored in the memory 91. A central control unit 92 that supplies the video data to the 3D processing unit 93, a 3D processing unit 93 that uses the supplied video data as video data for image display, and a head mounted display unit that transmits the video data created by the 3D processing unit 93. And a video interface unit 94 for supplying the signal to the video interface 80.
[0006]
The head mounted display unit 80 performs a display control of a central control unit 81 that performs display control of video, a video interface unit 82 that receives video data supplied from the host unit 90, and a video data that is received by the video interface unit 82. It is composed of a video display unit 83. As the image display unit 83, for example, a liquid crystal display panel arranged near the left and right eyes is used as a display unit. Generally, the sensor unit 70 and the head mounted display unit 80 are integrally configured. The host unit 90 includes, for example, a personal computer device and a large-capacity storage unit such as a hard disk or an optical disk.
[0007]
By preparing a head mounted display configured in this way, it becomes possible to display an image linked to the movement of the head of the wearer, and it is possible to display a so-called virtual reality image .
[0008]
[Problems to be solved by the invention]
By the way, since this type of head mounted display is a device for displaying an image, the power consumption is relatively large as a portable device, and for example, the duration when it is driven by a battery is not so long. On the other hand, video display on a head-mounted display is generally turned on and off by operating a power switch provided on the device.For example, even if the head-mounted display is left unattached, the power switch Is turned on, there is a problem that the state in which an image is displayed is continued and wasteful power is consumed.
[0009]
Here, the head mounted display for displaying an image has been described, but other head mounted devices also have the same problem. For example, even in the case of a head mounted device as an audio device, which is mounted on the head of a user and sets a direction in which stereophonic sound to be heard by the user is localized based on the detected mounting direction, the device is also used. If the power is left on when not in use, there is a problem that wasteful power is consumed.
[0010]
The present invention has been made in view of such a point, and an object of the present invention is to effectively prevent wasteful power consumption when not in use in a head mounted device such as a head mounted display.
[0011]
[Means for Solving the Problems]
The present invention detects a movement of a living body with a sensor attached to a predetermined portion of the living body, detects a direction or position of the living body based on the detected movement data, and is based on the detected direction or position. The power is automatically shut off when processing is performed and a state in which the movement of the living body is not detected for a predetermined time or more by the movement data output by the sensor continues.
[0012]
With this configuration, it is possible to determine the non-wearing state of the head mount device by using the output of the sensor that detects the movement, and when the non-wearing state is determined by the detection, the power supply is automatically shut off. In addition, unnecessary power consumption at the time of non-mounting is eliminated.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0014]
FIG. 1 is a diagram showing a mounting example of the head mounted display of the present embodiment. The head-mounted display 100 of the present example has a shape like headphones mounted on the left and right auricles of the user's head h, and has an image display unit after being shaped like the headphones. FIG. 1 shows a state in which the video display unit 110 is positioned in front of the user's eyes to view video and audio. The head-mounted display 100 is connected to a video signal source (not shown) by a cable 148, and displays a video supplied from the video signal source on a video display unit 110 and a driver unit attached to the left and right pinna. Output the supplied sound. In the case of this example, a sensor for detecting the direction in which the wearer is facing is built in the head-mounted display 100, and an image corresponding to the direction in which the wearer is detected is detected based on the output of the sensor. Is supplied from the video signal source to the head mounted display 100 for display. As for the sound, a sound having a phase corresponding to the direction in which the sound is directed may be output as a stereo sound signal.
[0015]
FIG. 2 is a diagram showing an example of the shape of the head mounted display 100. The head mounted display 100 of the present embodiment has a horizontally long image display unit 110 in a state where the left driver unit 140 and the right driver unit 150 are connected by the band 130 and supported by the left and right driver units 140 and 150. Is attached. The band 130 is made of a material having elasticity, and the left driver unit 140 and the right driver unit 150 are pressed against the auricle side of the wearer with relatively weak force and held on the head. There is. In a state where the left and right driver units 140 and 150 are not mounted on the head, a part of the left and right driver units 140 and 150 is in close contact with each other.
[0016]
The band 130 has a wide portion 131 formed at the center thereof, and is configured to stably hold the head mounted display 100 with the wearer's head. U-shaped metal holders 132 and 133 are formed at one end and the other end of the band 130, respectively. The U-shaped metal fittings 144 and 154 attached to the upper ends of the driver units 140 and 150 are formed in a U-shape. It is configured to be held by metal fitting holding portions 132 and 133. By changing the position at which the U-shaped fittings 144 and 154 are held by the holding portions 132 and 133, adjustments can be made according to the size of the head of the wearer.
[0017]
In each of the driver units 140 and 150, a driver arrangement section 141 and 151 in which a circular driver (speaker unit) for outputting a sound by supplying an audio signal is provided at the center, and each of the driver arrangement sections 141 and 151 is provided. Are attached around the periphery of the earbuds. Cavities 147, 157 are provided between each of the driver placement sections 141, 151 of this example and each of the ear pads 142, 152, and the driver placement sections 141 are slightly lifted with respect to the pinna of the wearer. , 151 are positioned so as to be a so-called full open air type headphone.
[0018]
In the video display section 110, a video display panel 100L for the left eye is disposed in front of the left eye of the wearer, and a video display panel 100R for the right eye is disposed in front of the right eye of the wearer. In FIGS. 1 and 2, the image display panels 100L and 100R are invisible because they are viewed from the outside. As each of the video display panels 100L and 100R, for example, a liquid crystal display panel is used. FIG. 3 is a view of the wearing state viewed from the side, and it can be seen that the left and right image display panels 100L and 100R are located in front of the wearer. However, the image display means, such as a liquid crystal display panel, is not always located close to the eyes. A display panel is arranged inside the image display unit 110, and the image is displayed in front of the wearer via optical components. There may be a configuration that appears to be displayed. When an illuminating unit such as a backlight is required, the image display unit 110 is incorporated.
[0019]
At the lower portion between the left and right liquid crystal display panels 100L and 100R, a nose cutout 100n is provided to prevent the image display unit 110 from contacting the wearer's nose when worn as shown in FIG. It is.
[0020]
As a mechanism for supporting the image display unit 110 with the left and right driver units 140 and 150, the connection member 113 is arranged such that one end and the other end of the image display unit 110 can be rotated on a horizontal plane via the connection units 111 and 112. , 114, and the ends of the connecting members 113, 114 are attached to the rod-shaped connecting members 117, 118 via connecting portions 115, 116 in a state where they can be rotated on a horizontal plane.
[0021]
Since there are two connecting portions 111, 112, 115, and 116 at two locations on the left and right sides in this way, as described above, the left and right driver units 140, The structure is such that the video display unit 110 can be held satisfactorily from the state in which the driver unit 150 is close to the state in which the left and right driver units 140 and 150 are separated from each other when mounted.
[0022]
The rod-shaped connecting members 117 and 118 connected to the image display unit 110 pass through the through holes 121 a and 122 a of the shaft holding units 121 and 122 fixed to the connecting members 123 and 124, and the through holes 121 a and 122 a The distance between the image display unit 110 and the eyes of the wearer can be adjusted by adjusting the protruding lengths of the bar-shaped connection members 117 and 118 from the camera.
[0023]
The connecting members 123 and 124 are connected to the left and right driver units 140 and 150 via connecting portions 145 and 155 so that they can be turned up and down. There is a configuration that can be raised. FIG. 4 is a diagram illustrating an example of a state in which the image display unit 110 is lifted up. When the image display unit 110 is raised to the upper part as described above, the image display unit 110 is positioned above the band 130. The video display unit 110 is electrically connected to the left and right driver units 140 and 150 via the cords 146 and 156 exposed to the outside from the rear ends of the rod-shaped connection members 117 and 118. The video signal obtained through the cord 148 connected to the video signal source is supplied to the video display unit 110, and the audio signal from the video signal source is also supplied to the right driver unit 150 through the cords 146 and 156. The configuration is as follows. Also, two sensors (not shown) are built in the driver unit 150 (or the video display unit 110), and control data based on the sensor output is supplied to the video signal source via the code 148. It is.
[0024]
Although not shown, a reset button or a power button is attached to a predetermined position (for example, one driver unit 140) of the head mounted display 100 of the present example, and other operation means such as a switch and a volume are provided. Are also arranged as necessary.
[0025]
Next, the principle of the processing configuration for detecting the direction in which the wearer's head is turned on the head mounted display 100 of the present embodiment will be described with reference to FIGS. As shown in FIG. 5A, the axis that erects the head h in the upright state is defined as the Z axis, and the X axis, the Y axis, and the X axis and the Y axis that are orthogonal to the Z axis are considered. Let us consider a three-dimensional coordinate position in the direction in which the wearer's head is turned on the Z axis. As shown in FIG. 5B, the X axis is an axis in the left-right direction of the head, and the Y axis is an axis in the front-rear direction of the head. At this time, the horizontal rotation of the head h is indicated by a yaw angle (Yaw angle) θ, which is an angle rotating about the Z axis, and the inclination of the head h in the front-rear direction is between the Y axis. , And the inclination of the head h in the left-right direction is shown as a roll angle (angle in the bending direction) formed between the head h and the X-axis.
[0026]
In order to accurately detect the three-dimensional direction of the wearer's head, it is necessary to detect the yaw angle θ, the roll angle, and the pitch angle. Conventionally, in order to detect each angle, Angular velocities are individually detected by three sensors each facing a different direction. Here, in this example, the yaw angle θ is detected from one gyro sensor. The gyro sensor is a sensor that detects an externally applied angular velocity or angular acceleration. Regarding the roll angle and the pitch angle, as shown in FIG. 5A, using the center of the sensor as the origin of the coordinate system in the figure, the X-axis direction and the Y-axis direction with respect to a plane (XY plane) composed of the X axis and the Y axis. The determination is made from the output of a tilt sensor (two-axis tilt sensor) for detecting the tilt. Here, the slope S ₁ in the Y-axis direction, and equivalent to the angular pitch angle of the X-axis rotation direction, the X-axis direction of the inclination S _2, is equal to the angle roll angle of the Y-axis rotation direction.
[0027]
Note that the tilt sensor is a sensor that measures gravity, which is a static acceleration, and therefore can detect only ± 90 degrees of judgment, but is within a range that can cover the rotation angle of the human head in the upright state. , The rotational position of the human head can be detected. Further, since the pitch angle and the roll angle are output using the gravity, which is a static acceleration, as an absolute coordinate axis, the drift phenomenon by the sensor does not occur. Acceleration S ₁ and S ₂ in the Z-axis direction, since the acceleration in the same direction, as shown in FIG. 6, in one of the acceleration sensor 12 for detecting acceleration in the Z-axis direction, detects the acceleration S ₁ and S ₂ Then, the roll angle and the pitch angle are determined. Further, the yaw angle θ is determined from the acceleration output from the gyro sensor 11 that detects the acceleration in this direction. These two sensors 11 and 12 may be arranged at any position of the head mounted display 100 as described above.
[0028]
Next, a circuit configuration of the head mounted display 100 of the present example will be described with reference to the block diagram of FIG. FIG. 7 also shows the configuration of the video signal source 20 connected to the head-mounted display 100 via the cord 148.
[0029]
The gyro sensor 11 attached to the head-mounted display 100 supplies the acceleration signal output from the sensor 11 to the analog processing unit 13, performs analog processing such as filtering and amplification by a low-pass filter, and then converts the data into digital data. It is supplied to the control unit 14. The tilt sensor 12 is a sensor that outputs an acceleration signal as a PWM signal, which is a pulse width modulation signal, and centrally controls a tilt state in the X-axis direction and a tilt state in the Y-axis direction as a PWM signal individually. Supply to the unit 14. The roll angle and the pitch angle are calculated based on the supplied PWM signal.
[0030]
The central control unit 14 detects the operation of the reset button 15 and the power button 16 provided on the head mounted display 100. The central control unit 14 detects the movement of the head of the wearer from the reference position based on the output of the gyro sensor 11 and the acceleration sensor 12 with the position when the reset button 15 is operated as the reference position. There is a configuration. The yaw angle, which is the direction in which the front of the head faces, is calculated based on the output of the gyro sensor 11. However, the yaw angle calculated based on the output of the gyro sensor 11 may be corrected using the roll angle and the pitch angle calculated based on the output of the inclination sensor 12. Specifically, for example, when the yaw angle moves while the head is relatively inclined in any direction, an error may occur in the yaw angle detected from the output of the gyro sensor 11. In such a case, the yaw angle may be corrected using the calculated roll angle and pitch angle.
[0031]
Also, when the power button 16 is pressed, the central control unit 14 performs power on / off control. That is, when it is detected that the power button 16 has been pressed while the power of the head mounted display 100 is off, control is performed to turn on the power of the head mounted display 100, and the video display on the video display unit 110 is performed. And so on. If it is detected that the power button 16 is pressed while the power of the head-mounted display 100 is on, the power of the head-mounted display 100 is shut down to stop displaying images.
[0032]
The ON / OFF control of the power by the central control unit 14 is executed by the control of a main power switch 19a of the output power of the power unit 19 as shown in FIG. That is, the head mounted display 100 of the present embodiment transforms and rectifies a commercial AC power supply or the like to obtain an operation power supply (for example, a DC low voltage power supply) (or obtain an operation power supply from a mounted battery). The power supply output from the power supply unit 19 is supplied to each circuit in the head-mounted display 100 via a main power switch 19a to be operated. Then, the main power switch 19 a is controlled by the central control unit 14 by operating the power button 16 or the like. The minimum circuits such as the central control unit 14 are always supplied with power from the power supply unit 19, and the minimum judgment necessary for power control such as operation of the power button 16 is performed even when the power is off. Are configured by the central control unit 14. However, the power supply to all the circuits including the central control unit 14 may be stopped by a direct operation of another power switch (not shown).
[0033]
In addition, when the head mounted display 100 of the present example detects that the movement has not been continued for a predetermined time from the outputs of the gyro sensor 11 and the tilt sensor 12 in a power-on state, the display 100 is not mounted. Upon determination, the main power switch 19a is turned off, and the power is automatically shut down. Details of the non-attachment detection process will be described later.
[0034]
The data of the calculated angles for each of the three axes (the yaw angle, the roll angle, and the pitch angle) calculated by the central control unit 14 are sent as head tracking angle data from the control interface unit 18 to the video signal source 20 side. Sent.
[0035]
The video signal source 20 includes, for example, a memory 21 for storing video data of the entire circumference around a certain point, audio data associated with the video data, and a head mounted display from video data stored in the memory 21. The central control unit 22 reads out video data in the direction indicated by the head tracking angle data detected at 100 and supplies the video data to the 3D processing unit 23, and uses the supplied video data as video data for image display. A 3D processing unit 23, a video interface unit 24 that supplies the video data created by the 3D processing unit 23 to the head mounted display unit 100, and a control interface that receives head tracking angle data detected by the head mounted display 100 And a unit 25.
[0036]
The video data supplied from the video signal source 20 to the head-mounted display 100 is received by the video interface unit 17 of the head-mounted display 100 and supplied to the video display unit 110, and the left and right video in the video display unit 110 Processing for displaying on the display panels 100L and 100R is performed. If the video data is video data for displaying a stereoscopic video, the video data supplied to and displayed on the left and right video display panels 100L and 100R is individual. The reception by the video interface unit 17 and the video display by the video display unit 110 are also executed under the control of the central control unit 14.
[0037]
Note that, in the block diagram of FIG. 7, a configuration for processing audio data is omitted. For the audio data, the head tracking process may not be performed. However, when stereo audio is output, the direction in which the sound image is localized may be changed to the angle indicated by the head tracking angle data. The video signal source 20 includes, for example, means for executing arithmetic processing such as a personal computer device, a video game device, a PDA (Personal Digital Assistants), and a mobile phone terminal, and a hard disk or optical disk in which these devices are built (or mounted) , A large-capacity storage means such as a semiconductor memory.
[0038]
Next, a non-wearing detection process of the head mounted display 100 of the present example will be described with reference to the flowchart of FIG. First, when power is supplied from the power supply unit 19 to the central control unit 14, the non-mounting detection motion data number n and the non-mounting detection counter M are set to 0 (step S51). The non-wearing detection motion data number n and the value of the non-wearing detection counter M are stored and set in a memory connected (or built-in) to the central control unit 14, for example.
[0039]
Next, a timer for determining a sensor detection interval is started (step S52). Thereafter, a main process as a head mounted display such as a sensor output detection process necessary for head tracking is executed (step S53), and it is determined whether a predetermined time for determining the detection interval started in step S52 has elapsed. (Step S54). The predetermined time may be, for example, a relatively long time of about 2 hours or a short time of about several minutes. The time for determining the detection interval may be freely set by, for example, user setting. If the set predetermined time has not elapsed, the process returns to the main process of step S53.
[0040]
If it is determined in step S54 that the predetermined time for determining the detection interval has elapsed, the process proceeds to step S55, in which the motion data (position data or acceleration data) of the wearer's head calculated in the main process of step S53 is calculated. , Etc.) are stored as the non-attachment detection motion data n. After the storage in step S55, it is determined whether or not the data is data No. 0 (that is, the data stored first) (step S56). If the data is data 0, the value of n is incremented by one. Then (step S57), the process returns to the main process of step S53.
[0041]
If the data number n determined in step S56 is not 0, the process proceeds to step S58, and the non-wearing detection motion data 0 obtained in step S55 is compared with the latest unwearing detection motion data. If the head-mounted display 100 is mounted on the head of the user, even if it is a slight movement, some movement should be performed, and thus the detected non-wearing detection motion data does not become constant. Here, the absolute value of the difference between the first non-wearing detection motion data D0 and the latest non-wearing detection motion data D1 (that is, | D0-D1 |) is compared with a preset threshold A, and | If D0−D1 | <A (that is, if there is a difference of not less than the threshold value A in the non-wearing detection motion data), it is determined that there is no wearing (that is, the wearing is performed), and the non-wearing detection motion data number n And the non-attachment detection counter M are reset to 0 (step S59), and the process returns to the main process of step S53.
[0042]
If | D0−D1 | <A is determined in step S58, it is determined that the wearer does not move, and the process proceeds to step S60. In addition, the threshold value A is a range in which it can be considered that the sensor is not mounted even if there is a difference between the past non-mounted detection motion data and the latest non-mounted detection motion data in consideration of the accuracy of the sensor and the influence of noise. Set as a value to decide. In step S60, an increment for adding one to the value of the non-mounting detection counter M is performed. Then, it is determined whether or not the incremented value of the non-mounting detection counter M is equal to or larger than a predetermined value B (step S61). When it is determined that the value of the non-wearing detection counter M is less than the predetermined value B, the process returns to the main process of step S53.
[0043]
If it is determined in step S61 that the value is equal to or more than the predetermined value B, it is determined that the unmounted state has been detected B times consecutively, and the time corresponding to the time detected continuously B times, The main power switch 19a is continuously turned off and the main power switch 19a is turned off to perform a shut-off process (step S62), and the process related to the power control based on the non-mounting detection ends. When the shut-off in step S62 is performed, the image display on the image display unit stops, and the output of sound from the drivers (speakers) built in the left and right driver units also stops.
[0044]
If the user wants to use the head mounted display by re-attaching it in the state where the automatic shut-off is performed, the user may press the power button 16 to turn on the power again, for example.
[0045]
As described above, when the unmounted state is detected based on the output of the head tracking sensor provided in the head mounted display, the power supply shut-off process of the head mounted display is automatically performed. Even if the power is left on when the power supply is mounted, useless power consumption can be suppressed. Further, it is possible to save the use time of parts having a usable life such as a display panel. Furthermore, since the unmounted state is detected based on the output of the head tracking sensor prepared in the head mounted display, a simple configuration that does not require a special sensor for detecting the unmounted state ensures reliable operation. An unmounted state can be detected, and there is an effect that there is almost no increase in cost due to detecting the unmounted state.
[0046]
Note that, in the above-described embodiment, the description has been given up to performing the automatic shut-off process of the power supply when the unmounted state is detected, but the power supply is automatically shut off by the detection of the unmounted state. Later, when a change is detected in the motion data based on the output of the sensor, the power may be turned on again. This eliminates the need for the user to operate the power button when re-attached.
[0047]
Further, in the above-described embodiment, as the process of detecting the non-attachment, the detection is performed using the motion data calculated from the two sensor outputs, but the output state of one of the sensors is directly determined. Then, it may be detected whether or not the camera is not mounted.
[0048]
The external shape of the head mounted display shown in FIGS. 1 to 4 is merely an example, and it goes without saying that the present invention can be applied to head mounted displays of other shapes. In this case, the sensor configuration can also be applied to a head-mounted device having a configuration including three sensors as described in the conventional example.
[0049]
Furthermore, in the description so far, an example is given in which the present invention is applied to a head mounted display that displays an image by being mounted on the head of a human body. However, for example, a headphone device that performs sound image localization position of stereo sound by head tracking (ie, The non-wearing state detection processing of the present invention may be applied to a device without a video display function). In this case as well, the sound output may be stopped when the non-attachment is detected. Further, the present invention can be applied to an apparatus which is mounted on another living body, detects a moving direction or position, and performs some processing when a change in the direction or position is detected.
[0050]
【The invention's effect】
According to the present invention, the non-wearing state of the head mount device can be determined by using the output of the sensor for detecting the movement, and when the non-wearing state is determined by the detection, the power supply is automatically shut off, and There is no needless power consumption during mounting. Since a sensor provided for head tracking in the head mount device is used as a sensor for detecting a non-wearing state, a sensor dedicated to non-wearing detection is not required, and the sensor can be realized with a simple configuration.
[0051]
In addition, after the automatic shut-off, when the movement of the living body is detected by the movement data output by the sensor, the power is turned on again so that the power-on operation when the body is re-mounted is not required. No longer needed.
[0052]
Further, the sensor is a sensor that outputs angular velocity or angular acceleration as motion data, and the control unit determines whether or not there is a movement from a change in the value of the angular velocity or angular acceleration output by the sensor, so that the sensor is securely mounted. The state can be detected.
[0053]
Furthermore, based on the data in the direction in which the head is turned, the video or audio is applied to a head-mounted display or the like that provides the video or audio in the corresponding direction, and the provision of the video or audio is stopped when shut off ( In other words, by stopping the display of the video and the output of the audio), the useless display of the video and the output of the audio are eliminated, and the unnecessary power consumption of the head mounted device can be effectively eliminated.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a mounting example of a head mounted display according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an example of a shape of a head mounted display according to an embodiment of the present invention.
FIG. 3 is a side view of the head mounted display of FIG. 2;
FIG. 4 is a perspective view showing an example of a state in which an image display unit of the head mounted display of FIG. 2 is raised.
FIG. 5 is an explanatory diagram showing a reference axis according to one embodiment of the present invention.
FIG. 6 is an explanatory diagram showing a detection state by a sensor according to one embodiment of the present invention.
FIG. 7 is a block diagram illustrating an example of a system configuration according to an embodiment of the present invention.
FIG. 8 is a flowchart illustrating an example of a non-attachment detection process according to an embodiment of the present invention.
FIG. 9 is a block diagram illustrating a system configuration example of a conventional head mounted display.
[Explanation of symbols]
11 gyro sensor, 12 acceleration sensor, 13 analog processing unit, 14 central control unit (CPU), 15 reset button, 16 power button, 17 video interface unit, 18 control interface unit, 19 Power supply unit, 19a Main power switch, 20 Video signal source, 21 Memory, 22 Central control unit (CPU), 23 3D processing unit, 24 Video interface unit, 25 Interface unit for control, 100 Head Mount display, 100L, 100R: image display panel, 100n: notch for nose, 110: image display, 111, 112 ... connecting part, 113, 114 ... connecting member, 115, 116 ... connecting part, 117, 118 ... Connection members, 121, 122 ... shaft holding parts, 123, 124 Connection part, 130 ... band, 131 ... wide part, 132, 133 ... U-shaped fitting holding part, 140 ... left driver unit, 141 ... driver arrangement part, 142 ... ear pad, 143 ... fitting holding part, 144 ... U-shaped fitting, 145 connecting part, 146 cord, 147 hollow part, 148 cord, 150 right driver unit, 151 driver placement part, 152 ear pad, 153 fitting holder, 154 U-shaped fitting, 155 connecting part , 156 ... cord, 157 ... cavity

Claims (6)

By the movement data detected based on the output of the sensor that detects the movement of the living body, the direction or position of the living body is detected, and the processing based on the detected direction or position is performed.
A power supply control method for automatically shutting off a power supply when a state in which a movement of a living body is not detected for a predetermined period of time or more in the movement data output by the sensor continues. The power supply control method according to claim 1,
A power supply control method for turning on power again when a movement of a living body is detected from the movement data output by the sensor after the automatic shutoff is performed. A sensor attached to the head of the living body or in the vicinity of the head and outputting motion data corresponding to the motion of the head,
Based on the motion data output by the sensor, the position of the direction or position of the head is calculated, and processing is controlled based on the calculated direction or position. Control means for automatically shutting off the power supply when the state in which no is detected continues;
A head mounting device comprising: a processing unit that executes a process based on the direction or the position under the control of the control unit. The head mount device according to claim 3,
The head mounting device, wherein the control unit performs control to turn on the power again when the movement of the living body is detected by the movement data output by the sensor after performing the automatic shut-off. The head mount device according to claim 3,
The sensor is a sensor that outputs an angular velocity or an angular acceleration as motion data, and the control unit determines the presence or absence of a movement from a change in the angular velocity or the angular acceleration output by the sensor. The head mount device according to claim 3,
The processing means is means for providing a video or an audio as a video or an audio in a corresponding direction based on data in a direction in which the head is turned, and a head mount for stopping the supply of the video or the audio when shut off. apparatus.

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