JP2009092950A - Display system - Google Patents

Abstract

[PROBLEMS] To change the display position so that the user can easily see the image, and avoid viewing the video content in an unreasonable posture.
The display means 1 can display a video content and select a display position for displaying the video content around the user. The posture detection means 2 uses an angle detector that detects the angle of the backrest portion in a bed having a reclining function. In the position selection means 5, the display position that is most easily visible among the display positions that can be selected by the display means 1 is related to the angle range detected by the angle detector, and the display position control means 6 An angle range to which the angle detected by the posture detection means 2 belongs is selected from the position selection means 5 and the video content is displayed at a display position related to the angle range.
[Selection] Figure 1

Description

  The present invention relates to a display system that presents video content on a display means.

  2. Description of the Related Art Conventionally, a technique for displaying a window on a screen of a display unit has been known for the purpose of facilitating visual recognition by a user (see, for example, Patent Document 1). The technique described in Patent Document 1 is to display a window displayed on the screen of a display device as a human interface of a computer in accordance with the position of the user's line of sight. Specifically, in the desktop display, the central position of the window is set at the top of the screen in view of the fact that the user's eyes are concentrated on the top of the screen, and on the projector, the user's eyes are concentrated on the bottom of the screen. In view of the above, the window is displayed at the center or slightly below.

In other words, the one described in Patent Document 1 will reduce eye fatigue by predetermining the direction in which the line of sight concentrates in one screen, displaying a window at that part, and reducing the movement of the line of sight. It is what.
JP 2003-223254 A

  By the way, the thing of patent document 1 makes the position which displays a window on a screen the position where a user's eyes | visual_axis concentrates according to the kind of display apparatus, and a user is face direction. Even if there is a change in the direction of the user's line of sight, for example, by changing the window, the position of the window does not change. Moreover, even if the user's line of sight changes, the position of the screen does not change, and the display position of the display content other than the window does not reflect the position of the user's line of sight.

  Therefore, for example, if the user's posture is lying down from the sitting state when displaying images of television broadcasts or movies on the display device, the user bends his neck and makes an unreasonable posture. Problems such as watching and causing stiff shoulders occur.

  The present invention has been made in view of the above reasons, and its purpose is to avoid viewing the video content in an unreasonable posture by changing the display position so that the user can easily see the image. It is to provide a display system capable of performing the above.

  According to the first aspect of the present invention, there is provided display means for displaying video content and capable of selecting a display position for displaying video content around the user, attitude detection means for detecting the attitude of the user, and attitude of the user Of the display position selectable by the display means and the position selection means that associates the display position that is most easily visible in the posture, and the position detected by the posture detection means And display position control means for displaying video content at the extracted display position.

  According to a second aspect of the present invention, in the first aspect of the invention, the posture detecting means is attached to furniture having a backrest portion that supports the back of the user and a reclining mechanism that can adjust the angle of the backrest portion. The angle of the backrest selected by the reclining mechanism is the user's posture.

  In the invention of claim 3, in the invention of claim 2, the furniture is a bed, and sleep detection means for detecting whether the user is awake or sleeping is provided, and the display means is provided by sleep detection means. When the user's sleep is detected, the display of the video content is stopped.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the posture detection means includes an imaging means for imaging the user, and the user's face orientation and body orientation from the user image obtained by the imaging means. And image processing means for detecting at least one of the user's posture as a user posture.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the content storage unit stores a plurality of video contents including video information, and instructs the content storage unit to select the video content. Read control means for instructing start / stop of reading of the selected video content is added, and a communication network is provided between the content storage means and the display means.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the display means is a plurality of display devices arranged for each display position.

  According to a seventh aspect of the present invention, in any one of the first to fifth aspects, the display means is a projector whose projection direction can be changed.

  According to an eighth aspect of the present invention, in any one of the first to sixth aspects, a partial area of the screen of the display device is used as the display means, and the display position control means determines a position of the area used for the display means. It is characterized by changing.

  According to the configuration of the first aspect of the invention, the display unit that enables selection of the display position of the video content is used, the posture of the user is detected by the posture detection unit, and the display position of the video content is detected by the posture detection unit. Since it is selected so that visual recognition is easy according to the detected posture of the user, the display position changes when the user changes the posture, and the user can take comparatively without taking an unreasonable posture such as bending the neck. You can continue watching video content in an easy posture.

  According to the configuration of the invention of claim 2, in furniture such as a massage chair and a bed having a reclining mechanism, the angle of the backrest is used for the determination of the posture of the user. With the configuration, the display position can be selected and the display position is changed according to the angle selected by the reclining mechanism. For example, even if the angle of the backrest is changed by the reclining mechanism, the angle of the neck changes. It is possible to view the display of the video content in front without making it.

  According to the configuration of the invention of claim 3, it is determined whether the user on the bed is awake or sleeping, and when the user is sleeping, the display of the video content on the display means is stopped. If the user falls asleep while watching the video content above, the display on the display means can be automatically stopped, and forgetting to turn off can be prevented.

  According to the configuration of the invention of claim 4, at least one of the orientation of the user's face and the orientation of the body is detected in the image including the user imaged by the imaging means, and the orientation of the face and the orientation of the body are detected. Since the display position of the display means is selected according to the video content, the video content can be displayed in the direction in which the user is facing the face or body, and the video content can be viewed with an easy posture for the user. It becomes possible to do.

  According to the configuration of the fifth aspect of the present invention, since the communication network is provided between the content storage means storing a plurality of types of video content and the display means, the content storage means is provided in a remote computer server or the like. This makes it possible to select and use various types of video content.

  According to the configuration of the invention of claim 6, since the display device is arranged for each display position, for example, if the display device is arranged on each of a plurality of wall surfaces and a ceiling surface, the displayed video content is changed to the wall surface. Since it does not straddle the ceiling surface and the display position is determined by the arrangement position of the display device, it is not necessary to adjust the display position.

  According to the configuration of the seventh aspect of the invention, since the projector whose projection direction can be changed is used as the display means, a plurality of display positions can be selected by one projector, and the initial cost can be reduced. it can. Further, there is an advantage that the installation location can be selected even at the same display position without being fixed at one location with respect to the display position.

  According to the configuration of the eighth aspect of the invention, since the area serving as the display means is provided in the screen of the display device, the area serving as the display means can be moved to an arbitrary position within the screen. Therefore, for example, the entire surface of one wall surface can be used as the screen of the display device, and the display means, which is a partial area in the screen, can be moved to the display position designated by the display position control means. The degree becomes higher.

(Embodiment 1)
In this embodiment, as shown in FIG. 2, a display means 1 capable of selecting display positions P1 to P3 in a room R is provided, and a bed B provided with a reclining mechanism (not shown) in the room R. Is assumed to be arranged as furniture. The furniture provided with the reclining mechanism may be a massage chair or the like in addition to the bed. Further, a configuration is adopted in which a projector is used as the display unit 1 and the display positions P1 to P3 are selected by adjusting the angles of the mirrors M1 and M2 arranged on the emission side of the projector 1. Of course, a motor-driven pedestal that adjusts the azimuth angle and tilt angle for projecting video content from the projector 1 (that is, a pedestal that can be adjusted between pan and tilt), and distortion of the image electrically or optically. The display positions P1 to P3 may be selectable by combining with correction means. In addition to the projector, the display means 1 has a configuration in which a thin display device is arranged for each of the display positions P1 to P3, and a partial area of the screen in the thin and large screen display device is used for the display means 1 and is used for the display means 1. A configuration in which the display positions P1 to P3 are changed by changing the region can be employed.

  When a projector is used as the display unit 1, the projector arrangement position does not need to be uniquely determined with respect to the display positions P1 to P3, so that the degree of freedom of the arrangement position of the display unit 1 is increased. On the other hand, when the display device 1 is used as the display means 1, the display positions P1 to P3 are determined by the position of the display device, so that the adjustment of the display positions P1 to P3 is easier than when the projector is used. Further, when a partial area of the screen of the display device is used for the display means 1, other video content is displayed in an area not used as the display means 1 on the screen of the display apparatus, or the display device is used for illumination. It becomes possible to do. Moreover, since any position in the screen can be used for the display means 1, the display positions P1 to P3 can be set to any position, and the degree of freedom of the display positions P1 to P3 is increased.

  The display positions P1 to P3 may adopt a configuration in which arbitrary positions can be selected (a configuration in which positions continuously change), but here, the display positions P1 to P3 are selected from three positions. That is, the display positions P1 to P3 are set so as to be positioned approximately in front of the line of sight of the user on the bed B when the angle of the back contact portion Ba of the bed B is changed (display positions P1 to P3). Even when P3 is set to the 3 position, the angle of the backrest portion Ba is not necessarily the 3 position).

  As shown in FIG. 1, the video content displayed on the display unit 1 is stored in the content storage unit 3 provided in the video distribution server SV1 including a computer server provided in the wide area network NT1 such as the Internet. The content storage means 3 stores a plurality of types of video content including video information. The content storage means 3 may be provided in the house. The on-demand video distribution technology is used as the technology for reading the content from the content storage unit 3 provided in the video distribution server SV1 and displaying it on the display unit 1. The video content may include only video information, but usually audio information is added, and video and audio are presented on the display means 1. Therefore, the display means 1 is provided with a speaker. Note that the video content does not necessarily have to be stored in the content storage means 3, and may be a TV broadcast image or a reproduced image such as a DVD.

  In the room R in which the display means 1 is arranged, posture detection means 2 for detecting the posture of the user is provided. The posture detection means 2 is attached to the reclining mechanism of the bed B, and includes an angle detector 2a that detects the angle of the backrest portion Ba by the reclining mechanism. Note that the angle change of the back contact portion Ba may be either manual or electric. The angle of the backrest portion Ba reflects the direction of the user's line of sight if the user who puts his back against the backrest portion Ba on the bed B is facing the front. . If the face or body is facing forward, the front direction is substantially determined by the angle of the backrest portion Ba, and therefore the angle detected by the angle detector 2a can be handled as the posture of the user.

  Here, the angle of the backrest portion Ba with respect to the horizontal plane is θ degrees, and a straight line extending in the direction of (θ + 90) degrees with respect to the horizontal plane from the position of the user's eyes passes through the representative point of the screen of the display means 1. The display positions P1 to P3 with respect to the angle θ of the back contact portion Ba are set. However, the display positions P1 to P3 are not strictly set, and the display positions P1 to P3 have a relatively wide allowable range. That is, if it is a position where the screen of the display means 1 can be accommodated in the field of view in an easy posture without bending the neck with respect to each angle of the backrest portion Ba, display positions P1 to P3 are set. You can choose.

  By the way, the process of selecting the video content to be presented on the display unit 1 from the video content stored in the content storage unit 3 such as the video distribution server SV1 and causing the display unit 1 to display the selected video content is the display unit. 1 is performed by the read control means 4 provided together with 1. The read control means 4 designates video content to be read to the content storage means 3 in response to an instruction from the user, etc., and instructs start / stop of reading.

  Which display positions P1 to P3 display the video content read by the read control unit 4 is determined by the relationship between the angle detected by the angle detector 2a defined by the position selection unit 5 and the display positions P1 to P3. . As shown in FIG. 3, the position selection means 5 has a data table in which the display positions P1 to P3 are associated with each angle range detected by the angle detector 2a. In the position selection means 5, display positions P <b> 1 to P <b> 3 that are most visible in each angle range (can be viewed without bending the neck) are related.

  The angle detected by the angle detector 2a is input to the display position control means 6, and the display position control means 6 collates the angle with the position selection means 5 and extracts the display positions P1 to P3. The display position control means 6 displays the video content read from the content storage means 3 by the read control means 4 at the display positions P1 to P3 thus extracted.

  Therefore, when the angle range defined in the position selection means 5 changes by changing the angle of the backrest portion Ba of the bed B while viewing the video content (that is, from one angle range to another The display position control means 6 changes the display position of the screen so that the video content is displayed at the display positions P1 to P3 that can be viewed with a comfortable posture for the user. become.

  In the present embodiment, since the display positions P1 to P3 are selected from a plurality of positions (three positions in the present embodiment), an angle range is associated with each of the display positions P1 to P3. Can be selected, the angle range can be set narrow. Further, in order to prevent the display positions P1 to P3 from being unstablely changed near the boundary of the angle range, the angle near the boundary of the angle range is not included as the selectable angle in the backrest portion Ba. Alternatively, hysteresis is applied so that once the angle range changes, it becomes difficult to return to the original angle range (for example, the angle boundary from the display position P1 to the display position P2 is 80 degrees, from the display position P2 to the display position P1). The boundary of the angle range is changed according to the change direction of the display positions P1 to P3 so that the angle boundary of the angle is 70 degrees).

  By the way, since the display positions P1 to P3 are changed in accordance with the angle change of the backrest portion Ba of the bed B, the user may fall asleep while viewing the video content. In this case, if the display unit 1 continues to display the video content, the display unit 1 consumes power wastefully, and the room R does not become dark and, in some cases, the sound is continuously output. It is possible that the quality will deteriorate.

  Therefore, the bed B is provided with sleep detection means 7 for detecting whether the user on the bed B is awake or sleeping. As the sleep detection means 7, a vibration sensor or a pressure sensor that detects body movement on the bed B can be used, and a heat ray sensor that monitors the heat dose emitted from the human body can be used. Any of the vibration sensor, the pressure sensor, and the heat ray sensor can detect a change from the awake state to the sleep state by detecting a decrease in body movement. When using a vibration sensor or a pressure sensor, a configuration in which a sleep state is detected by detecting a heart rate may be employed. Moreover, when using a heat ray sensor, you may make it use as a standard of discrimination | determination between a wakeful state and a sleep state by detecting a body temperature change from the change of a heat dose like a radiation type thermometer. Further, the degree of body movement of the user may be monitored by a TV camera. For example, with regard to the gray value for each pixel of images captured at different times, the difference between pixels at the same position is obtained to obtain the sum of the differences over the entire screen, and when this sum falls below a prescribed threshold, body movement decreases and sleep Judge that it is in a state.

  When the sleep state is detected by the sleep detection unit 7 during the period when the video content is displayed on the display unit 1, the sleep detection unit 7 notifies the display unit 1 and the display unit 1 stops the display of the video content. . In this way, by determining whether the user who is viewing the video content on the bed B is in a sleeping state or in an awake state, the display on the display means 1 is automatically stopped when the user goes to sleep. Forgetting to turn off the display device 1 can be prevented.

  Note that the configuration of the present embodiment can be realized even in a configuration that enables signal transmission between the devices having the above-described functions without using the wide area network NT1. The read control means 4, the position selection means 5, and the display position control means 6 are configured by executing appropriate programs on a computer.

(Embodiment 2)
In the present embodiment, as shown in FIG. 4, the posture detection unit 2 includes an imaging unit 2b including a TV camera that captures a space area (inside the room R) including the user, and a usage obtained by the imaging unit 2b. The image processing apparatus 2c detects at least one of the user's face orientation and body orientation from the image including the user as the user posture. In the following, the case of detecting the orientation of the face is exemplified, but the same applies to the case of detecting the orientation of the body, and it is possible to adopt a configuration in which both the orientation of the face and the orientation of the body are comprehensively determined. It is. In order to detect the orientation of the face by the image processing device 2c, after the position of the face is recognized, specified feature points in the face are extracted, and the positional relationship between the feature points is obtained.

  The operation after detecting the orientation of the face is the same as the operation after obtaining the angle by the angle detector 2a in the first embodiment. That is, the position selection unit 5 is provided with a data table in which the display position is related to the face direction, and the display position control unit 6 collates the face direction detected by the posture detection unit 2 with the position selection unit 5. The display position is extracted, and the video content is displayed at the extracted display position. Even if the orientation of the face indicates the orientation of the user with respect to the trunk, the positional relationship with the display position is not determined. Therefore, the orientation of the face is defined by the name of each face surrounding the room R and the portion within the face.

  For example, the wall surface 1, the wall surface 2, the wall surface 3, the wall surface 4, the ceiling surface, and the parts on each surface (upper surface, central portion, lower portion, etc. The orientation of the face may be defined by the following. In short, among the display positions that can be selected by the display means 1, it is only necessary to associate the display position with a display position that is close to the front of the face orientation. Therefore, the number of display positions that can be selected on the display means 1 and the number of types for determining the face orientation may be the same.

  In the present embodiment, in addition to using a projector as the display means 1, a thin display device is disposed on each surface (wall surface or ceiling surface) surrounding the room R as a display position. It is desirable to use a partial area in the screen as the display means 1. If this configuration is adopted, it is selected which display device the video content is displayed according to the orientation of the face, and further, which region is used for the display means 1 in the screen of one display device. As a result, video content can be displayed at an arbitrary position according to the orientation of the face.

  Similarly to the case of using the angle, the face orientation is also given hysteresis so that the movement of the display position is less likely to occur at the adjacent display positions. The application of hysteresis is performed according to a condition for determining the orientation of the face in the image processing means 2c (condition for determining the orientation of the face from the positional relationship of the feature points).

  By the way, in this embodiment, since the user is imaged using the imaging means 2b, a function for analyzing the user's operation is added and various instructions are given by a specific operation (gesture) of the user. May be. For example, on / off of the display unit 1 may be controlled by the movement of the user's finger or hand. Alternatively, it may be used for selection of video content by a user's operation. Other configurations and operations are the same as those of the first embodiment.

  In the first embodiment, the case where the user views the video content in the bed B having the reclining function is illustrated, and in FIG. 4 describing the second embodiment, the case where the user is seated on the chair-shaped furniture is illustrated. However, even when the video content is viewed in the bed B that does not have the reclining function, if the configuration of the second embodiment is adopted, the orientation of the face and the body is detected and the video content is displayed. Needless to say, the display position can be changed.

1 is a block diagram illustrating a first embodiment. It is a principal part block diagram same as the above. It is a figure which shows the structural example of the position selection means used for the same as the above. FIG. 6 is a main part configuration diagram showing a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display means 2 Posture detection means 2a Angle detector 2b Imaging means 2c Image processing means 3 Content storage means 4 Reading control means 5 Position selection means 6 Display position control means 7 Sleep detection means B Bed (furniture)
Ba Backrest M Housing NT1 Wide area network (communication network)
P1 to P3 display position SV1 video distribution server

Claims (8)

  Display means capable of selecting a display position for displaying video content and displaying video content around the user, a posture detecting means for detecting the posture of the user, and a user posture and display means. Among the display positions, a video is displayed at a display position extracted by collating the position detected by the position detection unit with the position selection unit that associates the display position that is most easily visible in the posture. A display system comprising display position control means for displaying content.   The posture detection means is attached to furniture having a backrest portion that supports the user's back and a reclining mechanism in which the angle of the backrest portion is adjustable, and uses the angle of the backrest portion selected by the reclining mechanism. The display system according to claim 1, wherein the display system is a person's posture.   The furniture is a bed and is provided with sleep detection means for detecting whether the user is awake or sleeping, and the display means displays video content when the sleep detection means detects the user's sleep. The display system according to claim 2, wherein the display system is stopped.   The posture detection means is an image pickup means for picking up an image of the user, and image processing for detecting at least one of the user's face orientation and body orientation as the user posture from the user image obtained by the image pickup means. The display system according to claim 1, further comprising: means.   Content storage means for storing a plurality of video contents including video information, and read control means for instructing the content storage means to select video content and instructing start / stop of reading of the selected video content, are added, The display system according to any one of claims 1 to 4, wherein a communication network is provided between the content storage means and the display means.   The display system according to claim 1, wherein the display means is a plurality of display devices arranged for each display position.   The display system according to claim 1, wherein the display unit is a projector whose projection direction can be changed.   7. The display device according to claim 1, wherein a part of a screen of a display device is used as the display unit, and the display position control unit changes a position of a region used for the display unit. Display system.

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