JP2012028928A - Image display device, image display system, record medium and image display method - Google Patents

Abstract

An image display apparatus having a 2D / 3D switching function that enables more comfortable viewing of 3D video is provided.
An image display device 10 includes a display for displaying video content in a two-dimensional display or a three-dimensional display, distance measuring units 11 and 21 for measuring a distance between the display and a viewer, a calculation unit 12, and a display. The control unit 16 is provided. The calculation unit 12 acquires information regarding viewing distance suitable for 3D display of video content and display size information, and calculates a viewing range suitable for 3D display of video content based on the acquired information. . Then, the display control unit 16 is based on the distance between the display and the viewer measured by the distance measurement units 11 and 21, and the viewing range suitable for the three-dimensional display of the video content calculated by the calculation unit 12. The display of the video content is set to 2D display or 3D display.
[Selection] Figure 2

Description

  The present invention relates to an image display device, an image display system, a recording medium, and an image display method, and more particularly to an image display device, an image display system, a recording medium, and an image display method capable of displaying two-dimensional video and three-dimensional video. .

  In recent years, in addition to two-dimensional (hereinafter referred to as 2D (dimension)) video, image display devices such as televisions that can display three-dimensional (hereinafter referred to as 3D) video have been actively developed. In such an image display device, during 3D video display, viewing is performed by artificially creating a parallax between an image projected on the left eye of the viewer (image for the left eye) and an image projected on the right eye (the image for the right eye). Makes the viewer feel a sense of depth and stereoscopic effect.

  The 3D video uses, for example, two lenses for the right eye and the left eye, and shoots the subject at different angles with respect to the two lenses, or the parallax for the left eye with respect to one image and It is created by performing image processing such as giving parallax for the right eye. However, such 3D video is normally created on the assumption that the viewer's viewpoint is always in the center of the display and the distance between the viewer and the display is constant. Therefore, the created 3D video is the same without changing with respect to the distance between the viewer and the display.

  Therefore, when the viewer is at the optimal distance from the display, the optimal 3D video can be viewed, but when the viewer is not at the optimal position, the optimal 3D video can be viewed. I can't. Further, when viewing a 3D video, for example, if the viewer is present at a position extremely close to the optimum position, there is a problem that the viewer's eyes become tired. On the other hand, if the viewer is present at a position farther than the optimal position when viewing 3D video, the 3D display becomes less stereoscopic and the 2D display can be viewed more favorably.

  Therefore, conventionally, various techniques have been proposed to solve the above-described problems (for example, refer to Patent Documents 1 and 2). Patent Document 1 proposes a technique in which the distance between the viewer and the display is detected by a distance detection unit, and 2D / 3D display is switched based on the detection result. Patent Document 2 proposes a technique for providing an optimal 3D video to a viewer by measuring the relative distance between the viewer and the display and changing the left and right parallax based on the measurement result. Yes.

Japanese Patent Laid-Open No. 2004-294861 Japanese Unexamined Patent Publication No. 01-96692

  As described above, in the conventional method of switching between 2D / 3D display, the distance between the viewer and the display is measured, and 2D / 3D display is switched based only on the measurement result. However, the parameter that determines the optimal viewing distance for 3D video is not limited to the distance between the viewer and the display. Therefore, from the viewpoint of optimal 3D video viewing, the above-described conventional method cannot be said to be sufficient, and a more suitable 2D / 3D display switching method is desired.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide an image display apparatus, an image display system, a recording medium, and an image having a 2D / 3D switching function that enables more comfortable viewing of 3D video. It is to provide a display method.

  In order to solve the above problems, an image display device of the present invention is configured to include a display, a distance measurement unit, a calculation unit, and a display control unit, and the function of each unit is as follows. The display displays the video content as a two-dimensional video or a three-dimensional video. The distance measuring unit measures the distance between the display and the viewer. The calculation unit acquires information regarding viewing distance suitable for 3D display of video content and display size information, and calculates a viewing range suitable for 3D display of video content based on the acquired information. Then, the display control unit sets the display of the video content to the two-dimensional display or the three-dimensional display based on the distance between the display and the viewer and the viewing range suitable for the three-dimensional display of the video content.

  The image display system of the present invention includes the above-described image display device of the present invention and a content supply source that supplies video content to the image display device.

  The recording medium of the present invention includes a video signal data portion in which information on video content is recorded, and a metadata portion in which information on viewing distance suitable for three-dimensional display of video content is recorded.

  Furthermore, the image display method of the present invention is a video content display method in the image display device of the present invention, and is performed according to the following procedure. First, the distance measuring unit measures the distance between the display and the viewer. Next, the calculation unit acquires information about viewing distance suitable for 3D display of video content and display size information, and based on the acquired information, viewing range suitable for 3D display of video content Is calculated. Then, the display control unit sets the display of the video content to the two-dimensional display or the three-dimensional display based on the distance between the display and the viewer and the viewing range suitable for the three-dimensional display of the video content.

  In the present invention, the display form of the video content is displayed in 2D or 3D based on not only the measurement result of the distance between the display and the viewer, but also information on the viewing distance suitable for the three-dimensional display of the video content and the size information of the display. Switch to display. Therefore, according to the present invention, more comfortable viewing of 3D video is possible.

It is an external appearance block diagram of the image display apparatus which concerns on one Embodiment of this invention. It is a block block diagram inside the image display apparatus which concerns on one Embodiment of this invention. It is a figure which shows the structural example of metadata. It is a flowchart of the switching method of 2D / 3D display. It is a figure which shows the operation example of the image display apparatus which concerns on one Embodiment of this invention. It is a figure which shows the operation example of the image display apparatus which concerns on one Embodiment of this invention.

Hereinafter, an example of an image display device and a 2D / 3D display switching method according to an embodiment of the present invention will be described in the following order with reference to the drawings. In addition, this invention is not limited to the following embodiment.
1. Configuration example of image display apparatus and image display system 2.2D / 3D display switching method

<1. Configuration Example of Image Display Device and Image Display System>
[2D / 3D display switching principle]
First, before describing the configuration of an image display apparatus and an image display system according to an embodiment of the present invention, the principle of a 2D / 3D display switching method in the present embodiment will be briefly described.

  As described above, in the conventional image display device, the distance between the viewer and the display is measured, and 2D / 3D display is switched based only on the measurement result. However, the optimal viewing distance of 3D video changes depending not only on the distance between the viewer and the display but also on conditions such as the size of the display and the content of the video content (for example, the type of movie, sports, etc.) Conceivable.

  Therefore, in the present embodiment, not only the information on the current position of the viewer (the current distance between the viewer and the display) but also the display size information and the viewing distance suitable for 3D display set for each video content. The 2D / 3D display is switched using the information regarding.

[Configuration of Image Display Device and Image Display System]
The configuration of the image display apparatus and the image display system of the present embodiment that enables the 2D / 3D display switching method described above will be described with reference to FIGS. 1 is an external perspective view of the image display apparatus 10 of the present embodiment, and FIG. 2 is a diagram illustrating an internal configuration of the image display apparatus 10 of the present embodiment and a schematic configuration of the image display system. However, FIG. 2 shows only a main part that operates mainly when switching between 2D / 3D display. In the present embodiment, an image display apparatus that performs 3D display using an active shutter method will be described as an example.

  The image display device 10 includes an image display device body 1 and 3D glasses 2 (viewing glasses). The image display system 100 includes an image display device 10 and a content supply source 3 as shown in FIG. Note that the content supply source 3 includes, for example, a recording medium such as a DVD (Digital Versatile Disc), a distribution source that distributes video content via the Internet, and the like. To supply.

  The image display device main body 1 displays predetermined video content acquired from the content supply source 3 on the display 1a. The image display apparatus body 1 includes a transmission / reception unit 11 (distance measurement unit), a processing unit 12 (calculation unit), a storage unit 13, a video reading unit 14, a display unit 15, and a control unit 16 (display control unit). With.

  The transmission / reception unit 11 (first communication unit) transmits / receives a predetermined signal to / from the 3D glasses 2 by wireless communication. For example, when measuring the distance between the image display device main body 1 and the 3D glasses 2 (viewer), the transmission / reception unit 11 transmits a predetermined wireless signal to the 3D glasses 2 and a response signal from the 3D glasses 2. Receive. Then, the transmission / reception unit 11 outputs the received response signal to the processing unit 12. An arbitrary signal can be used as the distance measurement radio signal transmitted from the transmission / reception unit 11, and for example, a pulse wave modulation signal can be used.

  The processing unit 12 calculates the current distance between the image display device main body 1 and the 3D glasses 2 based on the response signal input from the transmission / reception unit 11. Specifically, the time from when the wireless signal is transmitted from the transceiver 11 to the 3D glasses 2 until the response signal is received, that is, the response speed is calculated, and the image display device main body 1 and The distance between the 3D glasses 2 is calculated.

  Further, the processing unit 12 reads the size information of the display 1 a stored in advance in the storage unit 13. Further, the processing unit 12 reads the metadata included in the video content data read into the video reading unit 14 via the storage unit 13. In the present embodiment, as will be described later, this metadata includes information on a suitable viewing distance between the image display device main body 1 and the 3D glasses 2 when viewing the read video content in 3D video. It is.

  Then, the processing unit 12 obtains a suitable viewing range when 3D displaying the video content read by the video reading unit 14 based on the acquired metadata. Next, the processing unit 12 provides the control unit 16 with the calculated distance between the image display device body 1 and the 3D glasses 2, the acquired size information of the display 1a, and information on a viewing range suitable for 3D display of video content. Output to.

  In this example, the example in which the processing unit 12 having the functions as described above is provided in the image display apparatus main body 1 has been described. However, the present invention is not limited to this and may be provided in the 3D glasses 2. In the present embodiment, an example in which the processing unit 12 and the control unit 16 are provided separately is shown. However, the present invention is not limited to this, and the processing unit 12 and the control unit 16 may be configured integrally. Good.

  The memory | storage part 13 memorize | stores various data required when displaying a content on the display 1a. For example, the size information of the display 1 a described above is stored in the storage unit 13. The storage unit 13 temporarily stores metadata of the read video content.

  The video reading unit 14 reads data of a predetermined video content from the external content supply source 3. When the content supply source 3 is a recording medium such as a DVD, for example, the video reading unit 14 is configured by a drive for the recording medium. In addition, when the content supply source 3 is, for example, a distribution source that distributes video content via the Internet or the like, the video reading unit 14 is necessary when connecting the image display device 10 to a predetermined network, for example. Composed of various communication devices.

  The display unit 15 includes, for example, the display 1a and a processing circuit that performs predetermined image processing on the input video. Then, the display unit 15 performs predetermined image processing on the predetermined video content acquired via the video reading unit 14 and displays it. Further, when the 3D video for the active shutter system is input, the display unit 15 alternately displays the left-eye image and the right-eye image at a predetermined switching cycle on the display 1a.

  The control unit 16 controls the operation of each unit constituting the image display apparatus main body 1. For example, the control unit 16 is based on the distance information between the image display device main body 1 and the 3D glasses 2 input from the processing unit 12, the size information of the display 1a, and the information on the viewing range suitable for 3D display of video content. Thus, it is determined which of 2D / 3D display is selected. In this determination process, it is determined whether or not the distance between the image display device main body 1 and the 3D glasses 2 is in a range suitable for viewing 3D video.

  When the distance between the image display device main body 1 and the 3D glasses 2 is within a range suitable for viewing 3D video, the control unit 16 controls the display unit 15 to set the display 1a to 3D display. At this time, the control unit 16 transmits a signal for selecting 3D display (selection signal) and a synchronization signal at the time of 3D display to the 3D glasses 2 via the transmission / reception unit 11.

  On the other hand, when the distance between the image display device main body 1 and the 3D glasses 2 is not within a range suitable for viewing 3D video, the control unit 16 controls the display unit 15 to set the display 1a to 2D display. At this time, the control unit 16 transmits a signal for selecting 2D display (selection signal) to the 3D glasses 2 via the transmission / reception unit 11.

  The 3D glasses 2 have a shutter function that alternately opens and closes the left-eye lens and the right-eye lens in synchronization with the switching cycle of the left-eye image and the right-eye image on the display 1a when viewing 3D video of the active shutter system. (Not shown). Note that when viewing 2D video, the shutter function is off, and both the left-eye lens and the right-eye lens are open. This ON / OFF control of the shutter function is performed by a display mode selection signal transmitted from the control unit 16 of the image display apparatus body 1.

  The 3D glasses 2 include a transmission / reception unit 21 (distance measurement unit). The transmission / reception unit 21 (second communication unit) is transmitted from the control unit 16 via the transmission / reception unit 11 of the image display apparatus main body 1 and is used for ON / OFF control of the shutter function (for 3D display or 2D display). Selection signal). In addition, the transmission / reception unit 21 transmits an image switching cycle of the display 1a and a shutter function opening / closing cycle of the 3D glasses 2 that are transmitted from the control unit 16 via the transmission / reception unit 11 of the image display device body 1 when viewing 3D video. A synchronization signal for synchronizing is received.

  Further, the transmission / reception unit 21 receives a distance measurement radio signal transmitted from the image display apparatus main body 1. When the transmission / reception unit 21 receives a wireless signal for distance measurement, the transmission / reception unit 21 transmits a response signal to the radio signal to the image display apparatus body 1.

[Data structure of video content]
Next, the data structure of the video content supplied from the content supply source 3 to the image display apparatus main body 1 will be described with reference to FIGS. 3 (a) and 3 (b). 3A shows an example of the data structure of video content, and FIG. 3B shows another example of the data structure of video content.

  The data of the video content 30 includes a video signal data unit 31 and a metadata unit 32. In the video signal data section 31, video content data is recorded.

  On the other hand, information about the video content 30, for example, information such as creation date / time, creator, title, data format, and the like is recorded in the metadata unit 32. Further, in the present embodiment, information related to a suitable viewing distance between the image display device main body 1 and the 3D glasses 2 when viewing the video content 30 in 3D video is recorded in the metadata unit 32.

  Specifically, in the present embodiment, start point distance data and end point distance data of a suitable viewing range when viewing 3D video are recorded in the metadata unit 32 as information regarding viewing distance. In addition, since the suitable viewing range at the time of viewing this 3D image changes depending on the size of the display display, a suitable viewing range is set for each of a plurality of sizes of the display display. In other words, in the present embodiment, information related to a suitable viewing range of a plurality of 3D videos respectively set for a plurality of sizes of the display display is recorded in the metadata unit 32.

  However, the information form regarding the suitable viewing range of the 3D video is not limited to the above example. For example, data of a viewing range of 3D video converted (standardized) to a display size per inch or the like may be used as information regarding a suitable viewing distance of 3D video. In this case, it is possible to cope with any display size, and it is possible to reduce the amount of information related to a suitable viewing distance of the 3D video included in the metadata unit 32.

  Further, the metadata unit 32 may be arranged at the head of the video content 30 as shown in FIG. 3A, or may be appropriately placed in the middle of the video content 30 as shown in FIG. 3B. The metadata unit 32 may be inserted. In the latter case, for example, the metadata unit 32 may be inserted for each scene. In this case, a metadata unit 32 corresponding to the scene is inserted before the video signal data unit 31 of the scene.

<2.2D / 3D display switching method>
Next, a 2D / 3D display switching method in the image display apparatus 10 of the present embodiment will be described with reference to FIGS. 4, 5A and 5B, and FIGS. 6A and 6B. To do.

  FIG. 4 is a flowchart showing the procedure of the 2D / 3D display switching method in this embodiment. FIG. 5A is a diagram showing a state in which the viewer 200 wearing the 3D glasses 2 is within a suitable viewing range of 3D video, and FIG. 5B is a display in that case. It is a figure which shows the display state of 1a. Further, FIG. 6A is a diagram showing a state in which the viewer 200 wearing the 3D glasses 2 is not within a suitable viewing range of 3D video, and FIG. 6B is a display in that case. It is a figure which shows the display state of 1a.

  In the present embodiment, first, the processing unit 12 of the image display device 10 determines the position of the viewer 200 (image display based on the response speed of the wireless signal obtained by wireless communication between the image display device body 1 and the 3D glasses 2. The distance between the apparatus main body 1 and the 3D glasses 2 is calculated (step S1).

  Next, the processing unit 12 acquires size information of the display 1a stored in the storage unit 13 and information regarding a suitable viewing distance of the 3D video included in the metadata of the video content read by the video reading unit 14. . Then, the processing unit 12 obtains a suitable viewing range (hereinafter referred to as a 3D display region) when 3D displaying the video content read by the video reading unit 14 from the acquired information (step S2).

  Note that, in step S2, when information on a suitable viewing range of a plurality of 3D videos respectively set for a plurality of display sizes is recorded in the metadata, the processing unit 12 performs the following process: A suitable 3D display area (start point distance Ls and end point distance Le) is obtained. First, the processing unit 12 reads information on a suitable viewing range of a plurality of 3D videos included in the metadata and size information on the display 1a. Next, the processing unit 12 compares the acquired information and specifies information on a suitable viewing range of the 3D video corresponding to the size of the display 1a.

  On the other hand, when information on a suitable viewing range of 3D video converted to a size per inch is stored in the metadata, for example, the processing unit 12 performs the following in step S2, for example, as follows. Then, a 3D display area corresponding to the size of the display 1a is calculated. However, here, an example will be described in which the start point distance and the end point distance of the 3D display area converted to the size per inch included in the metadata of the video content are 5 cm and 30 cm, respectively.

  For example, when the size of the display 1a is 20 inches (size information) (specific example 1), the start point distance Ls of the 3D display area is 5 cm × 20 inches = 100 cm, and the end point distance Le of the 3D display area is 30 cm × 20 inches = 600 cm. That is, in the case of the specific example 1, the 3D display area is a range in which the distance from the display 1a is 1 to 6 m.

  For example, when the size of the display 1a is 40 inches (specific example 2), the start point distance Ls of the 3D display area is 5 cm × 40 inches = 200 cm, and the end point distance Le of the 3D display area is 30 cm × 40 inches = 1200 cm. That is, in the case of the specific example 2, the 3D display area is a range in which the distance from the display 1a is 2 to 12 m.

  As described above, the 3D display area calculated in step S2 varies depending on the size of the display 1a when the start point distance and the end point distance of the 3D display area converted into the size per inch are constant. Although the display size standard is 1 inch here, the present invention is not limited to this, and the display size standard can be set to an arbitrary size.

  Next, the control unit 16 compares the current position of the viewer 200 measured in step S1 with the 3D display area calculated in step S2, and determines whether or not to perform 3D display (step S3).

  In step S3, as shown in FIG. 5A, when the viewer 200 is present in the 3D display area, that is, when the viewer 200 is located between the start point distance Ls and the end point distance Le from the display 1a. Step S3 is YES. More specifically, for example, in the above specific example 1 (3D display area = 1 to 6 m), when the viewer 200 exists at a distance of 2 m from the display 1a, step S3 is YES.

  In this case, the control unit 16 controls the display unit 15 and the 3D glasses 2 to display the video content in 3D (step S4: state shown in FIG. 5B).

  On the other hand, in step S3, as shown in FIG. 6A, when the viewer 200 does not exist in the 3D display area, that is, the viewer 200 is not located between the start point distance Ls and the end point distance Le from the display 1a. In this case, step S3 is NO. More specifically, for example, in the above-described specific example 2 (3D display area = 2 to 12 m), when the viewer 200 is present at a distance of, for example, 1 m or 13 m from the display 1a, step S3 is NO. It becomes.

  In this case, the control unit 16 controls the display unit 15 and the 3D glasses 2 to display the video content in 2D (step S5: state shown in FIG. 6B).

  In the present embodiment, the display of the video content (display 1a) is switched between 2D display and 3D display as described above. In the present embodiment, the 2D / 3D display switching process is performed before and / or after playback of video content. When the 2D / 3D display switching process is performed after reproduction, it is performed at predetermined intervals (for example, every 1 second).

  However, the timing of executing the 2D / 3D display switching process is not limited to this example. For example, the 2D / 3D display switching process may be appropriately executed by a predetermined operation (manual operation) of the viewer 200. Further, even if a human sensor is provided in the image display device 10 and the presence sensor detects the presence or absence of movement of the viewer, the above-described 2D / 3D display switching process is executed when the viewer moves. Good.

  As described above, in the present embodiment, not only the current position information of the viewer 200 but also the size information of the display 1a and the information regarding the suitable viewing distance of the 3D video included in the metadata of the video content are used. Switch 2D / 3D display. Therefore, in this embodiment, 2D / 3D display can be switched more optimally regardless of the size of the display 1a, the type (contents) of the video content, etc., and more comfortable 3D video viewing is possible. It becomes.

  In particular, the 2D / 3D switching method according to the present embodiment is used when the viewing distance of the viewer becomes extremely short (when the burden on the eyes becomes larger) or when the viewer becomes far away (the 3D display becomes invisible three-dimensionally). In such a case). Even in such a case, according to the present embodiment, it is possible to reduce the burden on the viewer's eyes and provide an optimal viewing mode, and to further improve the comfort of viewing video content. .

<3. Various modifications>
Hereinafter, various modifications of the above embodiment will be described.

(1) Modification 1
In the above embodiment, an example has been described in which wireless communication is performed bidirectionally between the image display apparatus main body 1 and the 3D glasses 2 and the distance between the two is measured, but the present invention is not limited to this. For example, a wireless tag or the like may be attached to the 3D glasses 2 and a wireless signal for measurement distance may be transmitted from the 3D glasses 2 to the image display apparatus body 1 in one direction.

  The method for measuring the distance between the image display device main body 1 and the 3D glasses 2 is not limited to wireless communication. For example, a distance sensor using infrared rays, magnetism, ultrasonic waves, static electricity, sound, or the like is used to display an image. The distance between the apparatus main body 1 and the 3D glasses 2 may be measured.

(2) Modification 2
In the above embodiment, an example in which the number of viewers is one has been described, but the present invention is not limited to this. Even when there are a plurality of viewers, the image display device 10 and the 2D / 3D switching method of the present embodiment described above can be applied.

  In this case, the 2D / 3D switching method of the present embodiment described above may be applied to a viewer wearing predetermined 3D glasses among a plurality of viewers. Alternatively, the positions of all viewers may be measured, and the 2D / 3D switching method of the present embodiment described above may be applied to the position of the viewer closest to the display 1a. Further, the positions of all viewers may be measured to calculate the average position of a plurality of viewers, and the 2D / 3D switching method of the present embodiment described above may be applied to the average position.

(3) Modification 3
In the above embodiment, the data (start point distance Ls and end point distance Le) of the 3D display area is the same both when switching from 2D display to 3D display and when switching from 3D display to 2D display. However, the present invention is not limited to this. For example, a 3D display area used when switching from 2D display to 3D display (when the viewer moves as indicated by a broken arrow in FIG. 5A) and when switching from 3D display to 2D display (FIG. 6A ) The 3D display area used when the viewer moves as indicated by the broken arrow in FIG.

  For example, in the configuration of the specific example 1 (3D display area: 100 cm to 600 m), the 3D display area at the time of switching from 2D display to 3D display is set to 175 cm to 525 cm, and the 3D display at the time of switching from 3D display to 2D display The region may be 25 cm to 675 cm. That is, the 3D display area may have hysteresis depending on the display switching direction. In this case, it is possible to prevent the display format from frequently switching near the boundary of the 3D display area.

(4) Modification 4
In the above embodiment, the image display device 10 that displays 3D video by the active shutter method has been described as an example. However, the present invention is not limited to this, and the present invention is applicable to any image display device that can display 3D video. Applicable.

  For example, as a 3D display system using special glasses, there is a polarization system in addition to the active shutter system, but the present invention can also be applied to an image display device using this 3D display system. However, in this case, since there is no function of performing wireless communication between the image display device and the 3D glasses unlike the active shutter system, the transmission / reception unit 11 and the processing unit 12 and the transmission / reception unit 21 shown in FIG. Must be newly provided in the image display device main body and the 3D glasses, respectively.

  The present invention can also be applied to a naked eye type image display apparatus capable of 3D display. In this case, the transmission / reception unit 11 and the processing unit 12 shown in FIG. 2 are newly provided in the image display apparatus main body, and a communication device including the transmission / reception unit 21 shown in FIG. 2 is separately prepared. You just have to wear it. In this case, for example, the transmission / reception unit 21 shown in FIG. 2 may be incorporated in an operation means such as a remote controller.

  As described above, the present invention can be applied to an image display apparatus that employs a 3D display system other than the active shutter system, but it is necessary to add a new communication device in the 3D display system other than the active shutter system. . On the other hand, in the active shutter type image display device of the above-described embodiment, it is only necessary to add a distance measuring function to a conventional communication device, so that the 2D / 3D switching method can be realized more easily. Can do.

  DESCRIPTION OF SYMBOLS 1 ... Image display apparatus main body, 1a ... Display, 2 ... 3D glasses, 3 ... Content supply source, 10 ... Image display apparatus, 11, 21 ... Transmission / reception part, 12 ... Processing part, 13 ... Memory | storage part, 14 ... Image | video reading part , 15 ... Display section, 16 ... Control section, 30 ... Video content, 31 ... Video signal data section, 32 ... Metadata section

Claims (8)

A display for displaying video content in 2D or 3D video,
A distance measuring unit for measuring a distance between the display and the viewer;
A calculation unit that acquires information about viewing distance suitable for three-dimensional display of the video content and size information of the display, and calculates a viewing range suitable for three-dimensional display of the video content based on the acquired information When,
A display control unit configured to set the display of the video content to a two-dimensional display or a three-dimensional display based on a distance between the display and the viewer and a viewing range suitable for the three-dimensional display of the video content. Display device. The distance measuring unit is
A first communication unit that is provided on the display side and transmits a predetermined radio signal;
The second communication unit arranged on the viewer side, receives the predetermined radio signal, and transmits a response signal to the received predetermined radio signal to the first communication unit. Image display device. The image display apparatus according to claim 2, further comprising active shutter viewing glasses including the second communication unit. Information regarding viewing distance suitable for three-dimensional display of the video content is information standardized with a predetermined display size,
The image display device according to claim 1, wherein the calculation unit calculates a viewing range suitable for three-dimensional display of the video content based on the standardized information and the size information of the display. The information regarding viewing distance suitable for the three-dimensional display of the video content is different when the display of the video content is switched from the two-dimensional display to the three-dimensional display and when the display is switched from the three-dimensional display to the two-dimensional display. The image display device described in 1. A display for displaying video content as a two-dimensional video or a three-dimensional video; a distance measuring unit for measuring a distance between the display and a viewer; information about a viewing distance suitable for three-dimensional display of the video content; Obtaining size information, and calculating a viewing range suitable for three-dimensional display of the video content based on the acquired information, a distance between the display and the viewer, and 3 of the video content An image display device including a display control unit configured to set the display of the video content to a two-dimensional display or a three-dimensional display based on a viewing range suitable for a three-dimensional display;
An image display system comprising: a content supply source that supplies the video content to the image display device. A video signal data section in which video content information is recorded;
A metadata section in which information about viewing distance suitable for three-dimensional display of the video content is recorded. A display that displays video content as a two-dimensional image or a three-dimensional image, a distance measurement unit, a calculation unit that calculates a viewing range suitable for three-dimensional display of the video content, and display control that controls display of the video content A step of measuring the distance between the display and the viewer, the distance measuring unit of the image display device comprising a unit;
The calculation unit acquires information regarding viewing distance suitable for three-dimensional display of the video content and size information of the display, and is suitable for three-dimensional display of the video content based on the acquired information. Calculating a viewing range;
The display control unit sets the display of the video content to a two-dimensional display or a three-dimensional display based on a distance between the display and the viewer and a viewing range suitable for the three-dimensional display of the video content. An image display method including and.

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