JP2013167791A - Image display device and method of controlling image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device that can identify the type of content regardless of the type of a three-dimensional video system.SOLUTION: An image display device includes a control unit for generating display image data from content, and an image display unit for displaying an image by using the display image data. The control unit includes an identification unit that identifies whether content is three-dimensional content for three-dimensional image display or two-dimensional content for two-dimensional image display, and an image processing unit that generates three-dimensional image data when content is three-dimensional content and generates two-dimensional image data when content is two-dimensional content, as display image data, respectively.

Description

  The present invention relates to an image display device and a control method for the image display device.

  There is known an image display device capable of both planar image display using two-dimensional content and stereoscopic image display using three-dimensional content. In such an image display device, since the image display processing for two-dimensional content and the image display processing for three-dimensional content are different, the user can select the type of content (three-dimensional / 2 There is a problem that it takes time and effort.

  In order to eliminate such trouble, conventionally, a video (image) display device for identifying the type of content based on the similarity between pixels at the same position in the left half and right half of the image. Is known (for example, Patent Document 1).

JP 2010-68309 A Japanese Patent Laid-Open No. 11-275605

  With the conventional technology, it is possible to identify the type of content for side-by-side content that divides the screen into right and left halves and projects the right half of the video for the right eye and the left half of the video for the left eye. It was. However, there are many 3D contents using 3D video systems such as a frame sequential system, a top-and-bottom system, and a lenticular system. Therefore, the conventional technique has a problem that the type of content cannot be identified for content using a 3D video system other than the side-by-side system.

  An object of the present invention is to provide an image display device capable of identifying the type of content regardless of the 3D video system.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
An image display device,
A control unit that generates display image data from the content;
An image display unit for displaying an image using the display image data;
With
The controller is
An identification unit for identifying whether the content is 3D content for 3D image display or 2D content for 2D image display;
An image processing unit that generates 3D image data when the content is 3D content, and generates 2D image data as the display image data when the content is 2D content;
An image display device.
With this configuration, the identification unit identifies whether the content is 3D content or 2D content, and the image processing unit uses the 3D image data when the content is 3D content. When the content is two-dimensional content, two-dimensional image data is generated. Therefore, in the image display device, it is possible to identify the type of content regardless of the 3D video system, and to generate display image data according to the identification result.

[Application Example 2]
An image display device according to application example 1,
The control unit further includes:
The image processing unit includes a history storage unit that stores identification information for identifying the content on which the three-dimensional image data is generated,
The identification unit is
The content having the same identification information as the identification information stored as the generation of the 3D image data in the history storage unit is stored in the 3D content, and the 3D image data is stored in the history storage unit. An image display device that identifies the content having identification information different from the identification information stored as generated, from the two-dimensional content.
With such a configuration, the identification unit stores the content having the same identification information as the identification information stored as the generation of the three-dimensional image data in the history storage unit into the three-dimensional content and the history storage unit. Content having identification information different from the identification information stored as the generation of the three-dimensional image data is identified as two-dimensional content. Since the history storage unit stores identification information for identifying the content for which 3D image data has been generated in the past by the image processing unit, the identification unit can determine whether the 3D video system is used. Regardless, the type of content can be identified. Further, since the identification unit identifies the type of content using the past history, the processing load can be reduced.

[Application Example 3]
An image display device according to Application Example 2,
The control unit further includes:
An image display device comprising: a history adding unit that stores, in the image processing unit, identification information of the content for which the three-dimensional image data is generated in the history storage unit.
With this configuration, the history adding unit stores identification information for identifying the content for which three-dimensional image data has been generated in the image processing unit in the history storage unit. History can be stored.

[Application Example 4]
An image display device according to application example 2 or 3,
The history storage unit further includes:
In association with the identification information, for the content specified by the identification information, the time when the three-dimensional image data is generated is stored as a reproduction time,
The identification unit is
The content having the same identification information as the identification information stored as the generation of the three-dimensional image data in the history storage unit and the reproduction time is a predetermined time or more is referred to as the three-dimensional content. The content having identification information different from the identification information stored as the generation of the three-dimensional image data in the history storage unit or the reproduction time being less than a predetermined time is the two-dimensional content. An image display device that identifies
With such a configuration, it is possible to prevent the content in which the 3D image data is generated against the user's intention due to an erroneous operation of the switch or the like from being identified as the 3D content. .

[Application Example 5]
The image display device according to any one of Application Examples 1 to 4,
The identification unit is
For the first image data and the second image data obtained by dividing the image data included in the content vertically or horizontally, the luminance of pixels at a plurality of locations in one scanning line is stored and stored. Comparing the luminance sequence of the first image data and the second image data, and if the same or very similar pattern is included, the content is identified as the three-dimensional content; An image display device for identifying content from the two-dimensional content.
With such a configuration, the identification unit compares the arrangement of luminances of the first image data and the second image data obtained by dividing the image data included in the content, and is the same or very similar. In the case of content including a pattern, the content is identified as 3D content, and in other cases, the content is identified as 2D content. Therefore, the identification unit can identify the type of content for side-by-side 3D content and top-and-bottom 3D content.

[Application Example 6]
The image display device according to any one of Application Examples 1 to 5,
The control unit further includes:
In the image processing unit, for the content for which the three-dimensional image data has been generated, a history adding unit is provided that updates the content header or the identification information itself to give the fact that the content is three-dimensional content,
The identification unit is
Referring to the header or the identification information of the content, if the content is a three-dimensional content, the content is identified as the three-dimensional content; otherwise, the content is identified as the two-dimensional content. An image display device.
With such a configuration, the identification unit refers to the header of the content or the identification information itself, and if the content is 3D content, the content is the 3D content, and in other cases, the content. Is identified as two-dimensional content. In the content header or identification information, since the content for which 3D image data has been generated in the past by the image processing unit is given as being 3D content, in this way, the identification unit The type of content can be identified regardless of the 3D video format. In addition, since the identification unit identifies the type of content using information attached to the content header or identification information, the processing load can be reduced.

[Application Example 7]
The image display device according to any one of Application Examples 1 to 6,
The identification unit further includes:
An image display device that displays a confirmation message for confirming whether the content identification result is correct or not on the image display unit.
With such a configuration, the identification unit displays a message for confirming whether the content identification result is correct or incorrect on the image display unit, and thus can ask the user of the image display device for confirmation.

[Application Example 8]
The image display device according to any one of Application Examples 1 to 7,
The image display device is a head-mounted display device that allows a user to visually recognize a virtual image,
The image display unit
A pair of image light generators that generate and emit image light representing an image using display image data;
A pair of light guides for guiding the emitted image light to the eyes of the user;
Including
The image processing unit
When the content is a three-dimensional content, generate three-dimensional image data that is a set of different display image data used in one of the image light generation unit and the other image light generation unit, When the content is two-dimensional content, an image that generates two-dimensional image data that is a set of the same display image data used in one of the image light generation unit and the other image light generation unit Display device.
With such a configuration, when the content is three-dimensional content, the image processing unit is a set of different display image data used by one image light generation unit and the other image light generation unit. When 3D image data is generated and the content is 2D content, 2D image data that is a set of the same display image data used in one image light generation unit and the other image light generation unit Is generated. For this reason, in the head-mounted display device, it is possible to generate display image data according to the identification result by the identification unit.

[Application Example 9]
The image display device according to any one of Application Examples 1 to 8,
The image processing unit
An image display device that, when the content is a three-dimensional content, generates the two-dimensional image data for a predetermined time, and then generates the three-dimensional image data.
With such a configuration, when the content is three-dimensional content, the image processing unit generates two-dimensional image data for a predetermined time, and then generates three-dimensional image data. That is, the image processing unit intentionally provides a time lag before the generation of the three-dimensional image data. As a result, the image display device can make it easier for the user of the image display device to notice that the image being viewed is a three-dimensional image.

  The present invention can be realized in various modes. For example, an image display device, a control method for the image display device, an image display system, and a computer for realizing the functions of these methods, devices, or systems. It can be realized in the form of a program, a recording medium on which the computer program is recorded, or the like.

It is explanatory drawing which shows the structure of the external appearance of the image display apparatus in one Example of this invention. It is a block diagram which shows the composition of head mount display HM functionally. It is explanatory drawing which shows the outline | summary of the display image data generation process by an image process part. It is explanatory drawing which shows a mode that image light is inject | emitted by the image light production | generation part. It is explanatory drawing which shows an example of the virtual image recognized by the user. It is explanatory drawing which shows an example of a log | history memory | storage part. It is a flowchart which shows the procedure of a reproduction | regeneration start process. It is a flowchart which shows the procedure of the reproduction | regeneration end process. It is a flowchart which shows the procedure of the reproduction | regeneration start process in 2nd Example. It is the schematic for demonstrating the determination method of step S304. It is a flowchart which shows the procedure of the reproduction | regeneration start process in 3rd Example. It is a flowchart which shows the procedure of the reproduction | regeneration end process in 3rd Example.

  Next, embodiments of the present invention will be described based on examples.

A. First embodiment:
(A-1) Configuration of image display device:
FIG. 1 is an explanatory diagram showing an external configuration of an image display apparatus according to an embodiment of the present invention. The image display device HM is a head-mounted display device worn on the head, and is also called a head mounted display (HMD). The head mounted display HM of the present embodiment is an optically transmissive image display device that allows a user to visually recognize a virtual image and at the same time directly view an outside scene.

  The head-mounted display HM includes an image display unit 20 that allows the user to visually recognize a virtual image while being mounted on the user's head, and a control unit (controller) 10 that controls the image display unit 20.

  The image display unit 20 is a wearing body that is worn on the user's head, and has a glasses shape in the present embodiment. The image display unit 20 includes a right holding unit 21, a right display driving unit 22, a left holding unit 23, a left display driving unit 24, a right optical image display unit 26, and a left optical image display unit 28. Yes. The right optical image display unit 26 and the left optical image display unit 28 are disposed at positions corresponding to the right and left eyes of the user when the head mounted display HM is mounted. One end of the right optical image display unit 26 and one end of the left optical image display unit 28 are respectively connected at positions corresponding to the eyebrows of the user when the head mounted display HM is mounted. The right holding unit 21 extends from the end ER which is the other end of the right optical image display unit 26. Similarly, the left holding unit 23 extends from the end EL which is the other end of the left optical image display unit 28.

  The right holding unit 21 is substantially perpendicular to the right optical image display unit 26 from the end ER of the right optical image display unit 26 to a position corresponding to the user's temporal region when the head mounted display HM is mounted. It is a member provided by being stretched. Similarly, the left holding unit 23 is substantially perpendicular to the left optical image display unit 28 from the end EL of the left optical image display unit 28 to a position corresponding to the user's temporal region when the head mounted display HM is mounted. It is the member provided by extending | stretching so that. The right holding unit 21 and the left holding unit 23 hold the head mounted display HM on the user's head like a temple of glasses.

  The right display drive unit 22 is inside the right holding unit 21 (in other words, the side facing the user's head when the head-mounted display HM is mounted), and the end ER of the right optical image display unit 26. Arranged on the side. The left display driving unit 24 is disposed inside the left holding unit 23 and on the end EL side of the left optical image display unit 28. Hereinafter, the right holding unit 21 and the left holding unit 23 are collectively referred to simply as “holding unit”, and the right display driving unit 22 and the left display driving unit 24 are collectively referred to simply as “display driving unit”, and the right optical unit. The image display unit 26 and the left optical image display unit 28 are collectively referred to simply as “optical image display unit”.

  The display driving unit includes an LCD (Liquid Crystal Display), a projection optical system, and the like (not shown). Details will be described later. The optical image display unit as an optical member includes a light guide plate (not shown) and a light control plate. The light guide plate is formed of a light transmissive resin material or the like, and emits image light taken from the display driving unit toward the user's eyes. The light control plate is a thin plate-like optical element, and is disposed so as to cover the front side of the head mounted display HM (the side opposite to the user's eye side). The light control plate protects the light guide plate, suppresses damage to the light guide plate, adhesion of dirt, etc., and adjusts the light transmittance of the light control plate to adjust the amount of external light entering the user's eyes. The ease of visual recognition of the virtual image can be adjusted. The light control plate can be omitted.

  The image display unit 20 further includes a connection unit 40 for connecting the image display unit 20 to the control unit 10. The connection unit 40 includes a main body cord 48 connected to the control unit 10, a right cord 42 in which the main body cord 48 branches into two, a left cord 44, and a connecting member 46 provided at the branch point. Yes. The right cord 42 is inserted into the casing of the right holding unit 21 from the distal end AP in the extending direction of the right holding unit 21 and connected to the right display driving unit 22. Similarly, the left cord 44 is inserted into the housing of the left holding unit 23 from the distal end AP in the extending direction of the left holding unit 23 and connected to the left display driving unit 24.

  The image display unit 20 and the control unit 10 transmit various signals via the connection unit 40. Each end of the main body cord 48 opposite to the connecting member 46 and the control unit 10 are provided with connectors (not shown) that are fitted to each other. The connector of the main body cord 48 and the control unit 10 The control unit 10 and the image display unit 20 are connected to or disconnected from each other by the fitting / releasing of the connector. For the right cord 42, the left cord 44, and the main body cord 48, for example, a metal cable or an optical fiber can be adopted.

  The control unit 10 is a device for operating the head mounted display HM. The control unit 10 includes a lighting unit 12, a touch pad 14, a cross key 16, a power switch 18, and a display mode switch 19. The lighting unit 12 notifies the operation state of the head mounted display HM (for example, ON / OFF of the power supply) according to the light emission state. For example, an LED (Light Emitting Diode) can be used as the lighting unit 12. The touch pad 14 detects a user's finger operation on the operation surface of the touch pad 14 and outputs a signal corresponding to the detected content. The cross key 16 detects a pressing operation on a key corresponding to the up / down / left / right direction, and outputs a signal corresponding to the detected content. The power switch 18 switches the power-on state of the head mounted display HM by detecting a slide operation of the switch. The display mode changeover switch 19 manually switches between a 2D display mode (details will be described later) for displaying 2D content and a 3D display mode (details will be described later) for displaying 3D content.

  In this embodiment, the content means information content including an image (still image, moving image), sound, and the like. The content includes two-dimensional content that enables two-dimensional image display and three-dimensional content that enables three-dimensional image display. In addition, there are contents using various 3D video systems in the 3D contents. In the 3D video format, for example, a frame-sequential method that distributes the images seen by the left and right eyes one frame at a time, the horizontal scanning lines of the screen alternate from the top to the right-eye video, and the left-eye video one by one A top-and-bottom method that projects the screen in half, a side-by-side method that divides the screen into left and right halves and projects the right half of the image for the right eye and the left half of the image for the left eye. There is an anaglyph method that uses a pair of red and blue filter glasses by displaying an image in which two colors of red and blue are superimposed on the screen.

  FIG. 2 is a block diagram functionally showing the configuration of the head mounted display HM. The control unit 10 includes an input information acquisition unit 110, a storage unit 120, a power supply 130, a CPU 140, an interface 180, and transmission units (Tx) 51 and 52, and these units are connected to each other via a bus (not shown). Has been.

  The input information acquisition unit 110 has a function of acquiring a signal corresponding to an operation input by a user such as an operation input to the touch pad 14, the cross key 16, and the power switch 18, for example. The storage unit 120 is a storage unit including a ROM, a RAM, a DRAM, a hard disk, and the like (not shown). The storage unit 120 includes a history storage unit 122. Details will be described later. The power supply 130 supplies power to each part of the head mounted display HM. As the power supply 130, for example, a secondary battery can be used.

  The CPU 140 provides a function as an operating system (OS) 150 by executing a program installed in advance. In addition, the CPU 140 develops firmware and computer programs stored in the ROM or hard disk in the RAM and executes them, thereby executing an identification unit 142, a history adding unit 144, an image processing unit 160, an audio processing unit 170, and a display control unit. It also functions as 190.

  The identification unit 142 executes a reproduction start process (details will be described later) using a content reproduction start request from the OS 150 as a trigger. In the reproduction start process, the identification unit 142 identifies the type of content, and performs display image data generation processing in the 2D display mode or display image data generation processing in the 3D display mode according to the identified content type. A request is made to the image processing unit 160. In this embodiment, “content type” includes two-dimensional content and three-dimensional content.

  The history adding unit 144 executes a reproduction end required process (details will be described later) using a content reproduction end request from the OS 150 or the end of content file (EOF, End Of File) as a trigger.

  FIG. 3 is an explanatory diagram showing an overview of display image data generation processing by the image processing unit 160. First, as a process common to the display image data generation process in the 2D display mode and the display image data generation process in the 3D display mode, the image processing unit 160 includes an image included in the content input via the interface 180. Get the signal. For example, in the case of a moving image, the acquired image signal is generally an analog signal composed of 30 frame images per second. The image processing unit 160 separates synchronization signals such as the vertical synchronization signal VSync and the horizontal synchronization signal HSync from the acquired image signal. Further, the image processing unit 160 generates a clock signal PCLK using a PLL (Phase Locked Loop) circuit (not shown) or the like according to the period of the separated vertical synchronization signal VSync and horizontal synchronization signal HSync.

  The image processing unit 160 converts the analog image signal from which the synchronization signal is separated into a digital image signal using an A / D conversion circuit or the like (not shown). Thereafter, the image processing unit 160 stores the converted digital image signal as image data (RGB data) of the target image in the DRAM in the storage unit 120 for each frame. Note that the image processing unit 160 may perform image processing such as resolution conversion processing, various tone correction processing such as adjustment of luminance and saturation, and keystone correction processing on the image data as necessary. .

  FIG. 3A shows an overview of the display image data generation process in the two-dimensional display mode. In the two-dimensional display mode, the image processing unit 160 transmits the generated clock signal PCLK, vertical synchronization signal VSync, horizontal synchronization signal HSync, and image data stored in the DRAM in the storage unit 120 to the transmission units 51 and 52. Are transmitted to the image display unit 20 respectively. In the case of the two-dimensional display mode, image data transmitted through the transmission unit 51 (hereinafter, also referred to as “right-eye image data Data1”) and image data transmitted through the transmission unit 52 (hereinafter, “ The left-eye image data Data2 ”) is the same display image data.

  Note that a set of right-eye image data Data1 and left-eye image data Data2 generated in the two-dimensional display mode is also referred to as “two-dimensional image data”. In the example of FIG. 3A, image data on which an OSD (On Screen Display) display for displaying brightness, contrast, volume, and the like is displayed on the LCD screen is shown. The image processing unit 160 uses a non-compressed size 2D display mode OSD in the display image data generation process in the 2D display mode.

  FIG. 3B shows an overview of display image data generation processing in the three-dimensional display mode. Hereinafter, an example of processing when the side-by-side method is adopted as the three-dimensional video method will be described. In the three-dimensional display mode, the image processing unit 160 first divides image data stored in the DRAM in the storage unit 120 into left and right. Then, the image processing unit 160 doubles the right portion of the divided image data in the horizontal direction to generate right-eye image data Data1. Similarly, the image processing unit 160 enlarges the left portion of the divided image data twice in the horizontal direction, and generates left-eye image data Data2. In the three-dimensional display mode, the right-eye image data Data1 and the left-eye image data Data2 are different display image data.

  The image processing unit 160 transmits the generated clock signal PCLK, vertical synchronization signal VSync, horizontal synchronization signal HSync, and right-eye image data Data1 to the image display unit 20 via the transmission unit 51. Similarly, the image processing unit 160 transmits the generated clock signal PCLK, vertical synchronization signal VSync, horizontal synchronization signal HSync, and left-eye image data Data2 to the image display unit 20 via the transmission unit 52.

  Note that a set of right-eye image data Data1 and left-eye image data Data2 generated in the three-dimensional display mode is also referred to as “three-dimensional image data”. Moreover, in the above, the example of the process in case the side by side system is employ | adopted as a three-dimensional video system was shown. However, the image processing unit 160 is not limited to the side-by-side method, and can perform processing corresponding to various 3D video methods. Further, FIG. 3B shows image data on which OSD display is performed, as in FIG. In the display image data generation process in the 3D display mode, the image processing unit 160 uses the 3D display mode OSD having a size compressed to ½ width. Then, even when the right-eye image data Data1 and the left-eye image data Data2 are doubled in the horizontal direction in the display image data generation process, appropriate OSD display can be performed.

  In both the display image data generation process in the 2D display mode and the display image data generation process in the 3D display mode, the transmission units 51 and 52 are connected between the control unit 10 and the image display unit 20. Functions as a transceiver for serial transmission.

  The display control unit 190 in FIG. 2 generates a control signal for controlling the right display drive unit 22 and the left display drive unit 24. Specifically, the display control unit 190 uses the control signal to turn on / off the right LCD 241 by the right LCD control unit 211, turn on / off the right backlight 221 by the right backlight control unit 201, and control the left LCD. The left display drive unit 22 and the left display drive unit 24 are controlled by individually controlling the ON / OFF of the left LCD 242 by the unit 212 and the ON / OFF of the left backlight 222 by the left backlight control unit 202. Each controls the generation and emission of image light. For example, the display control unit 190 may cause both the right display driving unit 22 and the left display driving unit 24 to generate image light, generate only one image light, or neither may generate image light.

  The display control unit 190 transmits control signals for the right LCD control unit 211 and the left LCD control unit 212 via the transmission units 51 and 52, respectively. In addition, the display control unit 190 transmits control signals for the right backlight control unit 201 and the left backlight control unit 202, respectively.

  The audio processing unit 170 acquires an audio signal included in the content, amplifies the acquired audio signal, and applies to a speaker (not shown) in the right earphone 32 and a speaker (not shown) in the left earphone 34 of the image display unit 20. Supplied through the connection unit 40. For example, when a Dolby (registered trademark) system is adopted, processing is performed on an audio signal, and different sounds with different frequencies or the like are output from the right earphone 32 and the left earphone 34, respectively.

  The interface 180 is an interface for connecting various external devices OA that are content supply sources to the control unit 10. Examples of the external device OA include a personal computer PC, a mobile phone terminal, and a game terminal. As the interface 180, for example, a USB interface, a micro USB interface, a memory card interface, a wireless LAN interface, or the like can be provided.

  The image display unit 20 includes a right display drive unit 22, a left display drive unit 24, a right light guide plate 261 as a right optical image display unit 26, a left light guide plate 262 as a left optical image display unit 28, and a right earphone. 32 and a left earphone 34.

  The right display driving unit 22 includes a receiving unit (Rx) 53, a right backlight (BL) control unit 201 and a right backlight (BL) 221 that function as a light source, a right LCD control unit 211 that functions as a display element, and a right An LCD 241 and a right projection optical system 251 are included. The right backlight control unit 201, the right LCD control unit 211, the right backlight 221 and the right LCD 241 are also collectively referred to as “image light generation unit”.

  The receiving unit 53 functions as a receiver for serial transmission between the control unit 10 and the image display unit 20. The right backlight control unit 201 has a function of driving the right backlight 221 based on the input control signal. The right backlight 221 is a light emitter such as an LED or electroluminescence (EL). The right LCD control unit 211 has a function of driving the right LCD 241 based on the clock signal PCLK, the vertical synchronization signal VSync, the horizontal synchronization signal HSync, and the right eye image data Data1 input via the reception unit 53. Have The right LCD 241 is a transmissive liquid crystal panel in which a plurality of pixels are arranged in a matrix.

  FIG. 4 is an explanatory diagram illustrating a state in which image light is emitted by the image light generation unit. The right LCD 241 changes the transmittance of the light transmitted through the right LCD 241 by driving the liquid crystal corresponding to each pixel position arranged in a matrix, thereby changing the illumination light IL emitted from the right backlight 221. It has a function of modulating into effective image light PL representing an image. As shown in FIG. 4, in this embodiment, the backlight method is adopted. However, the image light may be emitted using a front light method or a reflection method.

  The right projection optical system 251 in FIG. 2 is configured by a collimating lens that converts image light emitted from the right LCD 241 to light beams in a parallel state. The right light guide plate 261 as the right optical image display unit 26 guides the image light output from the right projection optical system 251 to the right eye RE of the user while reflecting the image light along a predetermined optical path. The right projection optical system 251 and the right light guide plate 261 are collectively referred to as “light guide unit”.

  The left display driving unit 24 includes a receiving unit (Rx) 54, a left backlight (BL) control unit 202 and a left backlight (BL) 222 that function as a light source, a left LCD control unit 212 and a left that function as a display element. An LCD 242 and a left projection optical system 252 are included. The left backlight control unit 202, the left LCD control unit 212, the left backlight 222, and the left LCD 242 are collectively referred to as an “image light generation unit”, the left projection optical system 252, and the left light guide plate 262. Are also collectively referred to as “light guides”. The right display drive unit 22 and the left display drive unit 24 are paired. Since each unit of the left display drive unit 24 has the same configuration and operation as each unit described in the right display drive unit 22, a detailed description will be given. Omitted.

  FIG. 5 is an explanatory diagram illustrating an example of a virtual image recognized by the user. As described above, the image light guided to both eyes of the user of the head mounted display HM forms an image on the retina of the user, so that the user can visually recognize the virtual image. As shown in FIG. 5, a virtual image VI is displayed in the visual field VR of the user of the head mounted display HM. In addition, the user can see the outside scene SC through the right optical image display unit 26 and the left optical image display unit 28 except the portion where the virtual image VI is displayed in the visual field VR of the user. . In the head mounted display HM of the present embodiment, the outside scene SC can be seen through the virtual image VI even in the portion where the virtual image VI is displayed in the visual field VR of the user.

(A-2) Configuration of history storage unit:
FIG. 6 is an explanatory diagram illustrating an example of the history storage unit 122. The history storage unit 122 according to the present exemplary embodiment is a storage unit for storing identification information for identifying content in the image processing unit 160 that has been generated in the past in the three-dimensional display mode. The history storage unit is updated in a reproduction end process, which will be described later, and as a result of the user of the head mounted display HM manually operating the display mode switch 19, the display image data generation process is performed in the image processing unit 160. Also updated when executed. Further, in a configuration in which the head mounted display HM includes a stereo camera, an image captured and stored by the stereo camera may be updated. The history storage unit 122 includes an identifier, a display mode, a reproduction date and time, a reproduction time, and a total number of reproductions.

  In the identifier field, identification information for identifying the content is stored. As the identification information, for example, a file name, a folder name, a file path, or the like can be adopted. The display mode field stores a display mode (two-dimensional display mode / three-dimensional display mode) in which display image data generation processing has been executed in the past by the image processing unit 160 for the content specified by the identification information. The reproduction date / time field stores the latest reproduction date / time for the content specified by the identification information. The playback time field stores the latest playback time for the content specified by the identification information. The total number of times of reproduction of the content specified by the identification information is stored in the total number of reproductions field.

  For example, in the example of entry E01 in FIG. 6, the content with the file name “XXXXXXX.avi” was played back at 12:23 on October 10, 2011 for 2 minutes 03 seconds in the 3D display mode. This indicates that a total of three playbacks have been performed so far.

(A-3) Playback start processing:
FIG. 7 is a flowchart showing the procedure of the reproduction start process. The reproduction start process is a process executed by the identification unit 142 to identify the content type and cause the image processing unit 160 to execute the display image data generation process in the display mode according to the content type identification result. It is processing of. The identification unit 142 acquires the identification information of the content (hereinafter, also referred to as “identification target content”) that has received a content reproduction request from the OS 150 (step S100). The identification unit 142 searches the identifier field of the history storage unit 122 using the acquired identification information as a key (step S102).

  The identification unit 142 identifies whether or not the identification target content is three-dimensional content using the search result in step S102 (step S104). Specifically, as a result of the search in step S102, the identification unit 142 has an entry that matches the history storage unit 122, and “3D display mode” is stored in the display mode field of the entry. The identification target content is identified as three-dimensional content (step S104: YES). On the other hand, the identification unit 142 stores “two-dimensional display mode” in the display mode field of the entry even if there is no matching entry in the history storage unit 122 as a result of the search in step S102 or there is a matching entry. If it is determined, the identification target content is identified as two-dimensional content (step S104: NO).

  In step S104, in addition to the above, it is also possible to identify whether the content to be identified is a three-dimensional content by using values stored in the playback time field of the history storage unit 122 or the total number of playback times field. Good.

  For example, as a result of the search in step S102, the identification unit 142 has an entry that matches the history storage unit 122, and “3D display mode” is stored in the display mode field of the entry. Only when a reproduction time of a predetermined time (for example, 1 minute) or more is stored in the reproduction time field, the content to be identified can be identified as a three-dimensional content. In this case, even if the identification unit 142 has a matching entry in the history storage unit 122 and “3D display mode” is stored in the display mode field of the entry, the reproduction time of the entry When the reproduction time of the field is less than the predetermined time, the identification target content is identified as two-dimensional content. The predetermined time can be arbitrarily determined. In this way, when the value of the playback time field is taken into account in identifying the type of content, for example, when the display mode changeover switch 19 is erroneously pressed, the third order is displayed in the 3D display mode against the user's intention. It is possible to prevent the content for which the original image data has been generated from being identified as three-dimensional content.

  Further, for example, as a result of the search in step S102, the identification unit 142 has an entry that matches the history storage unit 122, and “3D display mode” is stored in the display mode field of the entry, and When the number of reproductions equal to or greater than a predetermined number (for example, two times) is stored in the total number of reproductions field of the entry, the identification target content can be identified as three-dimensional content. Note that the predetermined number of times can be arbitrarily determined. Thus, if the value of the total number of times of reproduction field is taken into consideration, the reliability of the identification result can be further improved.

  When the identification target content is identified as two-dimensional content in step S104 (step S104: NO), the identification unit 142 causes the image processing unit 160 to generate display image data in the two-dimensional display mode ( FIG. 2) is requested (step S106), and then the process is terminated.

  When the identification target content is identified as three-dimensional content in step S104 (step S104: YES), the identification unit 142 confirms the correctness of the content type identification result with respect to the image processing unit 160. Is requested to be displayed (step S108). The image processing unit 160 that has received the request transmits a confirmation message stored in advance in the storage unit 120 to the image display unit 20. As the confirmation message, for example, a YES / NO dialog box displaying a sentence such as “Is this 3D content?” Can be adopted.

  If it is confirmed in step S108 that the content type is two-dimensional content (step S110: NO), the identification unit 142 causes the image processing unit 160 to generate display image data in the two-dimensional display mode. (FIG. 2) is requested (step S106). On the other hand, when it is confirmed in step S108 that the content type is three-dimensional content (step S110: YES), the identification unit 142 instructs the image processing unit 160 to display image data in the three-dimensional display mode. A generation process (FIG. 2) is requested (step S112), and then the process is terminated. In this way, the identification unit 142 can ask the user of the head mounted display HM to confirm whether the content type identification result is correct or incorrect.

  If it is confirmed in step S108 that the content type is three-dimensional content (step S110: YES), the identification unit 142 makes the image processing unit 160 remain in the two-dimensional display mode for a predetermined time. After requesting the display image data generation process (FIG. 2), the display image data generation process (FIG. 2) in the three-dimensional display mode may be requested. Although the predetermined time can be arbitrarily determined, it is preferably set to a short time that allows the user to visually recognize “switched to the three-dimensional mode”. In this way, the image processing unit 160 intentionally provides a time lag before the generation of the three-dimensional image data, so that the image being viewed is a three-dimensional image for the user of the head mounted display HM. You can make this easier to notice.

(A-4) Playback end processing:
FIG. 8 is a flowchart showing the procedure of the reproduction end process. The reproduction end process is a process executed by the history adding unit 144. The history storage unit 122 stores the identification information of the content for which the image processing unit 160 has generated the 3D image data in the 3D display mode. Process.

  The history adding unit 144 updates the history storage unit 122 using the information of the content that has received the content reproduction end request from the OS 150 or the content that has detected the end of the file (step S200). Specifically, the history providing unit 144 searches the identifier field of the history storage unit 122 using the content identification information as a key. If there is a matching entry, the history providing unit 144 updates the display mode field of the entry to the content indicating the display mode executed by the image processing unit 160. Similarly, the history adding unit 144 updates the fields of reproduction date / time and reproduction time using the processing date / time and processing time in the image processing unit 160. Further, the history adding unit 144 increments the total number of times of reproduction field. On the other hand, if there is no matching entry, the history providing unit 144 stores the identifier, display mode, playback date / time, playback time, and total number of playbacks in the new entry.

  Thereafter, the history providing unit 144 requests the image processing unit 160 to perform display image data generation processing (FIG. 2) in the two-dimensional display mode (step S202), and ends the processing. Note that the reason why the history adding unit 144 requests the display image data generation processing in the two-dimensional display mode in step S202 is that it is assumed that the screen returns to the standby screen of the OS 150 after the content reproduction is completed.

  As described above, according to the first embodiment, the identification unit 142 identifies whether the content is 3D content or 2D content in the reproduction start process, and If the content is 3D content, 3D image data is generated, and if the content is 2D content, 2D image data is generated. Therefore, in the head mounted display HM (image display device), it is possible to identify the type of content regardless of the 3D video system, and to generate display image data according to the identification result.

  Specifically, the identification unit 142 stores the identification information stored in the history storage unit 122 as the generation of the 3D image data (in other words, the value of the display mode field is “3D display mode”). Content having the same identification information as the stored identification information) and content having identification information different from the identification information stored as the three-dimensional image data is generated in the history storage unit 122. Identify as 2D content. Since the history storage unit 122 stores identification information for identifying content that has been generated in the past in the 3D display mode by the image processing unit 160 in the 3D display mode, the identification unit 142 can be configured in this manner. Can identify the type of content (2D content / 3D content) regardless of the 3D video format. Further, since the identification unit 142 identifies the type of content using the past history, the processing load on the CPU 140 can be reduced.

  Further, the history adding unit 144 causes the history storage unit 122 to store identification information for identifying the content for which the image processing unit 160 has generated the 3D image data in the 3D display mode. Therefore, a history of past display image data generation processing in the image processing unit 160 can be stored.

  Further, when the content is three-dimensional content, the image processing unit 160 includes one image light generation unit (for example, the right backlight control unit 201, the right LCD control unit 211, the right backlight 221 and the right LCD 241) and the other 3D image data that is a set of different display image data used by each of the image light generation units (for example, the left backlight control unit 202, the left LCD control unit 212, the left backlight 222, and the left LCD 242) To do. On the other hand, when the content is two-dimensional content, the image processing unit 160 uses two-dimensional image data that is a set of the same display image data used in one image light generation unit and the other image light generation unit. Is generated. For this reason, in the head mounted display HM, it is possible to generate display image data according to the identification result by the identification unit 142.

B. Second embodiment:
In the second embodiment of the present invention, a description will be given of a configuration in which the content type identification method in the reproduction start process is different. Below, only the part which has a different structure and operation | movement from 1st Example is demonstrated. In the figure, the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment described above, and detailed description thereof is omitted.

(B-1) Configuration of image display device:
The configuration of the head mounted display HM in the second embodiment is substantially the same as that of the first embodiment described with reference to FIGS. However, the control part 10 in 2nd Example is that the point which does not include the log | history memory | storage part 122 in the memory | storage part 120, the point which does not include the log | history provision part 144 in CPU140, and the processing content of the identification part 142 of CPU140 are 1st. Different from one embodiment.

(B-2) Playback start processing:
FIG. 9 is a flowchart showing the procedure of the reproduction start process in the second embodiment. The only difference from the first embodiment shown in FIG. 7 is that steps S300 to S306 are provided instead of steps S100 to S104, and the other steps are the same as in the first embodiment.

  The identification unit 142 acquires the image data stored in the DRAM in the storage unit 120 in the procedure described with reference to FIG. 2 for the content (content to be identified) received from the OS 150 (step S300). The identification unit 142 divides the acquired image data into left and right (step S302). Then, the identification unit 142 compares the divided left and right image data, and determines whether or not the same two image data are included in one image data (step S304). Note that the “same two image data” in the present embodiment allows a slight difference caused by noise or the like, or a difference intentionally provided for 3D display using parallax (same as Meaning).

FIG. 10 is a schematic diagram for explaining the determination method in step S304. The identification unit 142 performs the following processing on the right side portion of the image data divided in step S302 (right eye image data Data1) and the left side portion of the image data divided in step S302 (left eye image data Data2). Perform steps ac.
Procedure a) The luminance of all pixels in one scanning line (1H) is stored for the image data for right eye Data1.
Procedure b) The luminance of all pixels in one scanning line (1H) is stored for the image data for left eye Data2.
Procedure c) Compare the brightness sequences stored in Procedure a and Procedure b to determine whether the same or very similar patterns are included.
The identification unit 142 can determine that one image data includes the same two image data when it is determined in the procedure c that the same or very similar pattern is included. The right-eye image data Data1 is also referred to as “first image data”, and the left-eye image data Data2 is also referred to as “second image data”.

  The identification unit 142 repeats the above comparison for one field period, and when the determination that “the same or very similar pattern is included” is obtained in the step c more than a predetermined number of times in one field period, It may be determined that the same two pieces of image data are included in one piece of image data. In this way, since the determination of the procedure c is performed a plurality of times, the reliability of the determination can be improved.

  In the side-by-side image data, the contents of the right-eye image data Data1 and the left-eye image data Data2 are not exactly the same, but are shifted in the horizontal direction (scanning line direction). Even if the luminance of the pixels at the position is compared, no result is obtained. However, if the comparison method as described above is used, it is possible to correctly determine whether or not the same two image data are included in one image data for the side-by-side image data.

  The above method is merely an example, and various modifications are possible. For example, the identification unit 142 may store the luminance of the representative pixel in one scanning line in the procedure a and the procedure b. The representative pixel can be arbitrarily determined, and can be, for example, an odd-numbered pixel. In addition, for example, the identification unit 142 may replace the above steps a to c with a corresponding position (the same position) in consideration of a horizontal shift between the right-eye image data Data1 and the left-eye image data Data2. You may compare the brightness | luminance of the pixels in the position which is estimated to be. Further, for example, in the case of top-and-bottom image data, the identification unit 142 divides the image data acquired in step S302 into odd-numbered scanning line data and even-numbered scanning line data. What is necessary is just to perform the process of the same meaning as the procedure a and the procedure b.

  In step S306 in FIG. 9, the identification unit 142 identifies whether the identification target content is three-dimensional content using the determination result in step S304. Specifically, when it is determined in step S304 that the same two pieces of image data are included in one image data, the identification unit 142 identifies the identification target content as a three-dimensional content (step S306). : YES) On the other hand, when it is determined in step S304 that the same two pieces of image data are not included in one image data, the identification unit 142 identifies the identification target content as two-dimensional content (step S306: NO). . The processing after the identification unit 142 identifies the type of content to be identified is the same as that in the first embodiment shown in FIG.

  In the present embodiment, the process of analyzing the image data included in the content shown in steps S300 to S304 in FIG. 9 is referred to as “analysis process”.

(B-3) Playback end processing:
The procedure of the reproduction end process in the second embodiment is the same as that of the first embodiment shown in FIG. 8 except that step S200 is not provided.

  As described above, according to the second embodiment, the identification unit 142 uses the first image data (right-eye image data Data1) obtained by dividing the image data included in the content and the second image. Compare the brightness arrangement of the data (right-eye image data Data1), and identify the content as 3D content if the content contains the same or very similar patterns, and identify the content as 2D content otherwise To do. Therefore, the identification unit 142 can identify the type of content for the side-by-side 3D content and the top-and-bottom 3D content.

C. Third embodiment:
In the third embodiment of the present invention, a description will be given of a configuration in which the content type identification method in the reproduction start process is different. Below, only the part which has a different structure and operation | movement from 1st Example is demonstrated. In the figure, the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment described above, and detailed description thereof is omitted.

(C-1) Configuration of image display device:
The configuration of the head mounted display HM in the third embodiment is substantially the same as that of the first embodiment described with reference to FIGS. However, the control part 10 in 3rd Example differs in the point which does not include the log | history memory | storage part 122 in the memory | storage part 120, and the process content of the identification part 142 of CPU140, and the log | history provision part 144 from 1st Example.

(C-2) Playback start processing:
FIG. 11 is a flowchart showing the procedure of the reproduction start process in the third embodiment. The difference from the first embodiment shown in FIG. 7 is only that steps S400 to S404 are provided instead of steps S100 to S104, and the other steps are the same as those of the first embodiment.

  The identification unit 142 collates the identification information of the content (identification target content) received from the OS 150 (step S400). Specifically, the identification unit 142 acquires the identification information of the identification target content, and determines whether or not information indicating that it is a three-dimensional content is added to the acquired identification information itself. The information indicating that the content is three-dimensional content can be arbitrarily determined in advance. For example, a character string “3D”, an arbitrary symbol, or the like can be adopted. Next, the identification unit 142 collates the header information of the identification target content (step S402). Specifically, the identifying unit 142 refers to the header of the content to be identified, and determines whether information indicating that the content is the three-dimensional content is added to the information in the referenced header.

  The identification unit 142 identifies whether or not the identification target content is a three-dimensional content using the collation results of steps S400 and S402 (step S404). Specifically, the identification unit 142 determines that the content to be identified is a three-dimensional content when it is determined in at least one of steps S400 and S402 that information indicating that it is a three-dimensional content is given. (Step S404: YES). On the other hand, the identification unit 142 identifies that the identification target content is two-dimensional content when it is determined in both steps S400 and S402 that information indicating that the content is three-dimensional content is not given (step S400). Step S404: NO). The processing after the identification unit 142 identifies the type of content to be identified is the same as that in the first embodiment shown in FIG.

(C-3) Playback end processing:
FIG. 12 is a flowchart showing the procedure of the reproduction end process in the third embodiment. The reproduction end process in the third embodiment is a process executed by the history adding unit 144. For the content in which the image processing unit 160 generates the 3D image data in the 3D display mode, the content is processed. This is a process for updating the header or the identification information to give the fact that it is a three-dimensional content. The only difference from the first embodiment shown in FIG. 8 is that step S500 is provided instead of step S200, and the other steps are the same as in the first embodiment.

  The history providing unit 144 updates the content that has received the content reproduction end request from the OS 150 or the content that has detected the end of the file (step S500). Specifically, when the content is content for which 3D image data has been generated in the 3D display mode in the image processing unit 160, the history adding unit 144 adds 3D content to the header or identification information of the content. Add information indicating that there is. Note that the information added here is the same as the information described in step S400 in FIG. It is sufficient to update at least one of the content header or identification information, but both may be updated. On the other hand, the history adding unit 144 does not update the content when the content is content in which the image processing unit 160 generates the 2D image data in the 2D display mode.

  As described above, according to the third embodiment, the identification unit 142 refers to the header of the content or the identification information itself, and if the information indicating that the content is three-dimensional content is included, the content is three-dimensionally displayed. The content is identified as two-dimensional content in other cases. In the content header or identification information, information indicating that the content for which 3D image data has been generated in the past by the image processing unit 160 is a 3D content is assigned. Therefore, in this way, the identification unit 142 can identify the type of content regardless of the 3D video format. In addition, since the identification unit 142 identifies the type of content using information attached to the content header or identification information, the processing load on the CPU 140 can be reduced.

D. Variations:
In addition, this invention is not restricted to said Example and embodiment, A various structure can be taken in the range which does not deviate from the summary. For example, a function realized by software may be realized by hardware. In addition, the following modifications are possible.

D1. Modification 1:
In the above embodiment, the configuration using the head mounted display as the image display device has been described. However, the image display device is not limited to the head mounted display, and various devices can be employed. For example, a flat display device (a liquid crystal display device, a plasma display device, an organic EL display device, etc.), a projector, a car navigation system, or the like can be employed. In this case, the connection between the control unit and the image display unit may be a connection via a wired signal transmission path or a connection via a wireless signal transmission path. In this way, the control unit can be used as a remote controller for a normal flat display device.

D2. Modification 2:
In the said Example, it illustrated about the structure of the head mounted display. However, the configuration of the head-mounted display can be arbitrarily determined without departing from the gist of the present invention. For example, each component can be added, deleted, converted, and the like.

  In the above embodiment, for convenience of explanation, the control unit includes a transmission unit, and the image display unit includes a reception unit. However, each of the transmission unit and the reception unit in the above embodiment has a function capable of bidirectional communication, and can function as a transmission / reception unit. For example, the connection unit may be omitted, and the control unit and the image display unit may be configured to perform wireless communication. Specifically, the control unit further includes a first wireless communication unit, and the image display unit further includes a second wireless communication unit and a power source. In this case, the first wireless communication unit functions as a transmission unit in the above embodiment, and the second wireless communication unit functions as a reception unit in the above embodiment.

  In the above embodiment, the control unit includes two transmission units and the image display unit includes two reception units, and one transmission unit transmits right-eye image data to the reception unit of the right display drive unit, The other transmission unit is configured to transmit image data for the left eye to the reception unit of the left display driving unit. However, the configuration in the above embodiment is merely an example, and various modifications can be made. For example, one transmission unit included in the control unit and one reception unit included in the image display unit may be provided. In this case, in the display image data generation process, the image processing unit sends the clock signal PCLK, the vertical synchronization signal VSync, the horizontal synchronization signal HSync, and the image data stored in the DRAM in the storage unit 120 via the transmission unit. Send. Then, the image display unit that receives these data via the receiving unit generates right-eye image data and left-eye image data from the received image data (in other words, the image display unit is shown in FIG. 3). The processing described as being executed by the image processing unit can be performed instead).

  For example, the configurations of the control unit and the image display unit illustrated in FIG. 1 can be arbitrarily changed. Specifically, for example, the touch pad may be omitted from the control unit, and the operation may be performed using only the cross key. Further, the control unit may be provided with another operation interface such as an operation stick. Moreover, it is good also as what receives an input from a keyboard or a mouse | mouth as a structure which can connect devices, such as a keyboard and a mouse | mouth, to a control part. In addition, a communication unit using Wi-Fi (wireless fidelity) or the like may be provided in the control unit.

  For example, the control unit illustrated in FIG. 1 is connected to the image display unit via a wired signal transmission path. However, the control unit and the image display unit may be connected by a connection via a wireless signal transmission path such as a wireless LAN, infrared communication, or Bluetooth (registered trademark).

  For example, although the head-mounted display is a binocular transmissive head-mounted display, the head-mounted display may be configured as a non-transmissive head-mounted display that blocks the outside scene when the user wears the head-mounted display. Good. A monocular head-mounted display may be used.

  For example, functional units such as an image processing unit, a display control unit, an identification unit, a history adding unit, and a voice processing unit are realized by a CPU developing and executing a computer program stored in a ROM or a hard disk on the RAM. It was described as a thing. However, these functional units may be configured using an ASIC (Application Specific Integrated Circuit) designed to realize the function.

  Further, as the image display unit, instead of the image display unit worn like glasses, an image display unit of another shape such as an image display unit worn like a hat may be adopted. Further, the earphone may be an ear-hook type or a headband type, or may be omitted.

  For example, in the above embodiment, the secondary battery is used as the power source. However, the power source is not limited to the secondary battery, and various batteries can be used. For example, a primary battery, a fuel cell, a solar cell, a thermal cell, or the like may be used.

D3. Modification 3:
In the said Example, an example of the log | history memory | storage part was shown. However, the history storage unit in the above embodiment is merely an example, and various changes can be made.

  For example, the first reproduction time of the content specified by the identification information may be stored in the reproduction date / time. The same applies to the reproduction time.

  For example, the display mode, reproduction date / time, reproduction time, and total number of reproduction fields can be omitted. For example, when the display mode field is omitted, in the history storage unit, 3D image data has been generated in the past in the image processing unit 160 (3D display mode display image data generation processing has been performed. ) Only identification information for identifying content can be stored. In this case, in step S104 of the reproduction start process (FIG. 7), a “NO” determination may be made when there is no matching entry in the history storage unit.

  The history storage unit of the above embodiment stores identification information for identifying whether or not the three-dimensional image data has been generated “in units of contents”. However, the aspect in the said Example is an example to the last, and various changes are possible. For example, identification information for identifying whether or not three-dimensional image data has been generated “by frame” may be stored. In that case, in addition to the identifier for identifying the content, the history storage unit can further include information for identifying the frame (for example, the start time and end time of the target frame in the content). Further, in the reproduction start process (FIG. 7), the time of the target frame may be further considered in addition to the content identification information. In this way, fine control such as setting only a certain scene in the content to the three-dimensional display mode can be realized.

D4. Modification 4:
In the above embodiment, an example of the reproduction start process is shown. However, the processing procedures shown in FIGS. 7, 9, and 11 are merely examples, and various modifications are possible. For example, some steps may be omitted, and other steps may be added. Further, the order of the steps to be executed may be changed.

  For example, the display of confirmation messages (steps S108 and S110) for confirming the correctness of the identification result of the content type can be omitted. In this way, it is possible to quickly switch the display mode.

  For example, in the reproduction start process (FIG. 11) of the third embodiment, the execution order of steps S400 and S402 may be reversed. Further, either one of steps S400 and S402 may be omitted.

D5. Modification 5:
In the above embodiment, an example of the reproduction end process is shown. However, the processing procedures shown in FIGS. 8 and 12 are merely examples, and various modifications are possible. For example, some steps may be omitted, and other steps may be added. Further, the order of the steps to be executed may be changed.

  For example, the process of requesting the image processing unit to generate display image data in the two-dimensional display mode (step S202) can be omitted. In this way, the selected display mode can be used continuously.

  For example, the execution order of steps S200 and S202 may be reversed in the reproduction end process (FIG. 8) of the first embodiment. Similarly, in the reproduction end process (FIG. 12) of the third embodiment, the execution order of steps S500 and S202 may be reversed.

D6. Modification 6:
In the above embodiment, the image light generation unit is configured using a backlight, a backlight control unit, an LCD, and an LCD control unit. However, the above aspect is merely an example. The image light generation unit may include a configuration unit for realizing another method together with or in place of these configuration units.

  For example, the image light generation unit may include an organic EL (Organic Electro-Luminescence) display and an organic EL control unit. Further, for example, the present invention can be applied to a laser retinal projection type image display apparatus.

D7. Modification 7:
Of the constituent elements in the above-described embodiments and modifications, elements other than the elements corresponding to the configurations described in the independent claims in the claims are additional elements and can be omitted.

  Each component of the second embodiment has been described as replacing the corresponding component of the first embodiment, but the contents described in the second embodiment with respect to the corresponding component of the first embodiment are described. It may be added. For example, in the reproduction start process of the second embodiment, the identification unit executes both steps S100 to S102 described with reference to FIG. 7 and steps S300 to S304 described with reference to FIG. 9 in order to identify the type of content. May be. In this way, the identification unit can further improve the identification accuracy of the content type. The same applies to the third embodiment.

10. Control unit (controller)
DESCRIPTION OF SYMBOLS 12 ... Illuminating part 14 ... Touch pad 16 ... Cross key 18 ... Power switch 20 ... Image display part 21 ... Ear hook part 22 ... Right display drive part 24 ... Left display drive part 26 ... Right optical image display part 28 ... Left optical image Display unit 32 ... Right earphone 34 ... Left earphone 40 ... Connection unit 42 ... Right cord 44 ... Left cord 46 ... Connecting member 48 ... Body code 51 ... Transmitting unit 52 ... Transmitting unit 53 ... Receiving unit 54 ... Receiving unit 110 ... Input information Acquisition unit 120 ... storage unit 122 ... history storage unit 130 ... power supply 140 ... CPU
DESCRIPTION OF SYMBOLS 142 ... Identification part 144 ... History provision part 145 ... State confirmation part 160 ... Image processing part 170 ... Audio | voice processing part 180 ... Interface 190 ... Display control part 201 ... Right backlight control part (image light generation part)
202 ... Left backlight control unit (image light generation unit)
211 ... Right LCD controller (image light generator)
212 ... Left LCD controller (image light generator)
221 ... Right backlight (image light generator)
222: Left backlight (image light generator)
241 ... Right LCD (image light generator)
242 ... Left LCD (image light generator)
251 ... Right projection optical system (light guide unit)
252 ... Left projection optical system (light guide)
261 ... Right light guide plate (light guide part)
262 ... Left light guide plate (light guide part)
280 ... Power supply PCLK ... Clock signal VSync ... Vertical synchronization signal HSync ... Horizontal synchronization signal Data ... Image data Data1 ... Right eye image data (first image data)
Data2 ... Left eye image data (second image data)
OA ... external device PC ... personal computer SC ... outside view VI ... virtual image IL ... illumination light PL ... image light HM ... head mounted display (image display device)
VR: Field of view

Claims (10)

An image display device,
A control unit that generates display image data from the content;
An image display unit for displaying an image using the display image data;
With
The controller is
An identification unit for identifying whether the content is 3D content for 3D image display or 2D content for 2D image display;
An image processing unit that generates 3D image data when the content is 3D content, and generates 2D image data as the display image data when the content is 2D content;
An image display device. The image display device according to claim 1,
The control unit further includes:
The image processing unit includes a history storage unit that stores identification information for identifying the content on which the three-dimensional image data is generated,
The identification unit is
The content having the same identification information as the identification information stored as the generation of the 3D image data in the history storage unit is stored in the 3D content, and the 3D image data is stored in the history storage unit. An image display device that identifies the content having identification information different from the identification information stored as generated, from the two-dimensional content. The image display device according to claim 2,
The control unit further includes:
An image display device comprising: a history adding unit that stores, in the image processing unit, identification information of the content for which the three-dimensional image data is generated in the history storage unit. The image display device according to claim 2 or 3,
The history storage unit further includes:
In association with the identification information, for the content specified by the identification information, the time when the three-dimensional image data is generated is stored as a reproduction time,
The identification unit is
The content having the same identification information as the identification information stored as the generation of the three-dimensional image data in the history storage unit and the reproduction time is a predetermined time or more is referred to as the three-dimensional content. The content having identification information different from the identification information stored as the generation of the three-dimensional image data in the history storage unit or the reproduction time being less than a predetermined time is the two-dimensional content. An image display device that identifies The image display device according to any one of claims 1 to 4,
The identification unit is
For the first image data and the second image data obtained by dividing the image data included in the content vertically or horizontally, the luminance of pixels at a plurality of locations in one scanning line is stored and stored. Comparing the luminance sequence of the first image data and the second image data, and if the same or very similar pattern is included, the content is identified as the three-dimensional content; An image display device for identifying content from the two-dimensional content. The image display device according to any one of claims 1 to 5,
The control unit further includes:
In the image processing unit, for the content for which the three-dimensional image data has been generated, a history adding unit is provided that updates the content header or the identification information itself to give the fact that the content is three-dimensional content,
The identification unit is
Referring to the header or the identification information of the content, if the content is a three-dimensional content, the content is identified as the three-dimensional content; otherwise, the content is identified as the two-dimensional content. An image display device. The image display device according to any one of claims 1 to 6,
The identification unit further includes:
An image display device that displays a confirmation message for confirming whether the content identification result is correct or not on the image display unit. The image display device according to any one of claims 1 to 7,
The image display device is a head-mounted display device that allows a user to visually recognize a virtual image,
The image display unit
A pair of image light generators that generate and emit image light representing an image using display image data;
A pair of light guides for guiding the emitted image light to the eyes of the user;
Including
The image processing unit
When the content is a three-dimensional content, generate three-dimensional image data that is a set of different display image data used in one of the image light generation unit and the other image light generation unit, When the content is a two-dimensional content, an image that generates two-dimensional image data that is a set of the same display image data used in one of the image light generation unit and the other image light generation unit Display device. The image display device according to any one of claims 1 to 8,
The image processing unit
An image display device that, when the content is a three-dimensional content, generates the two-dimensional image data for a predetermined time, and then generates the three-dimensional image data. An image display method,
(A) generating display image data from content;
(B) displaying an image using the display image data;
With
The step (a)
(A1) identifying whether the content is a three-dimensional content of a three-dimensional image display or a two-dimensional content of a two-dimensional image display;
(A2) generating three-dimensional image data when the content is three-dimensional content, and generating two-dimensional image data as the display image data when the content is two-dimensional content;
An image display method including:

Images