JP2014130204A - Display device, display system, and control method of display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply an effective stimulus to user's visual function with an easy-to-use device.SOLUTION: A head-mounted display device HM includes: displaying means that outputs image light to make an image recognized visually, and can independently display an image to be visually recognized by the left eye of a wearer and an image to be visually recognized by the right eye; and a training image display control section 191 for displaying, with the displaying means, a visual function stimulus image having the left image to be visually recognized by the left eye of the wearer and the right image to be visually recognized by the right eye. The visual function stimulus image is an image for encouraging the movement in the near/far direction of the watching point of the wearer by making the left image different from the right image.

Description

  The present invention relates to a display device, a display system, and a display device control method.

  2. Description of the Related Art Conventionally, there is known a device that gives a stimulus to a user's visual function for the purpose of improving visual function or recovering visual function fatigue (for example, see Patent Documents 1 and 2). The device described in Patent Document 1 has a configuration in which a user puts his face on the eyepiece and looks into the housing, and moves the display unit provided in the housing to approach and separate from the eyepiece. Stimulate the imaging function. Moreover, the visual acuity training device described in Patent Document 2 promotes eyeball divergent movement and vergence movement by moving a plate with a Landolt ring.

JP 2007-014417 A JP 2011-224310 A

In order to obtain an effect with this type of device, it is desirable to use it continuously, but the above-mentioned conventional device needs to be equipped with a mechanism unit that moves to give a stimulus to the visual function, and it is difficult to reduce the size. There were problems in terms of securing the location and ease of use. In addition, the method of visually recognizing images and patterns provided in a fixed manner has a problem in that the types of stimulation given are limited.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a more effective stimulus to a user's visual function by a device that can be easily used. .

In order to achieve the above object, the present invention is a head-mounted display device that outputs image light to visually recognize an image, and an image that is visually recognized by the wearer's left eye and an image that is visually recognized by the right eye. Display means capable of independently displaying and a display control means for displaying a visual function stimulus image having a left image visually recognized by the wearer's left eye and a right image visually recognized by the right eye by the display means; The visual function stimulus image is an image that prompts the wearer to move the point of sight in the perspective direction by making the left image and the right image different from each other.
According to the present invention, the head-mounted display device allows the wearer to visually recognize the image, thereby urging the wearer to move the gazing point in the perspective direction. Thus, the installation location can be easily secured and easily used. By using a simple display device, the visual function of the wearer can be effectively stimulated to improve the visual function and recover from fatigue. Moreover, since it is easy to change the image to be displayed, it is possible to give more effective stimulation without getting tired of the wearer.

Further, the present invention is the display device described above, wherein the display means is a see-through display means for visually recognizing the outside scene and the image, and the visibility of the outside scene can be adjusted. .
According to the present invention, since the wearer can visually recognize the display image and the outside scene in an overlapping manner and the visibility of the outside scene can be adjusted, the wearer can improve visual function and recover from fatigue while looking at the outside scene. Can be achieved. Since the wearer can visually recognize the outside scene, the psychological resistance of the wearer can be further reduced, and the apparatus of the present invention can be used more easily. Furthermore, by utilizing the appearance of the outside scene, it is possible to stimulate the visual function without giving an unnatural impression to the wearer.

Further, the present invention is the above-described display device, wherein the display control unit causes the display unit to display the visual function stimulation image that leads the convergence angle of the left eye and the right eye of the wearer to a predetermined convergence angle. It is characterized by.
According to the present invention, by guiding the left and right convergence angles of the wearer to a predetermined convergence angle, it is possible to stimulate the wearer's convergence angle adjustment function, and to improve visual function and recover from fatigue. .

Further, the present invention is the above-described display device, wherein the display control means causes the display means to display the visual function stimulus image that changes the convergence angle of the left eye and the right eye of the wearer over time. Features.
According to the present invention, it is possible to stimulate the wearer's convergence angle adjustment function more effectively by urging the wearer to change the left and right convergence angles, thereby improving visual function and recovering fatigue. be able to.

Further, the present invention is the display device, wherein the display control unit includes the same left image as the stereoscopic image composed of the left image and the right image having parallax as the visual function stimulus image. And a plane image composed of the right image and the right image are displayed by the display means.
According to the present invention, it is possible to perform various displays by visually recognizing a stereoscopic image and a planar image, and it is possible to give stimulation more effectively.

Moreover, the present invention is the display device described above, wherein the display control unit is capable of displaying an image in which a display element to be watched moves as time passes, as the visual function stimulus image.
ADVANTAGE OF THE INVENTION According to this invention, various irritation | stimulation can be given with respect to a wearer's visual function by the change of the display element of a gaze target.

Further, the present invention is the above-described display device, wherein the line-of-sight detection unit detects a line-of-sight direction of the wearer, and the line-of-sight detection unit detects the visual function stimulus image when the display unit displays the visual function stimulus image. History storage means for storing the wearer's line-of-sight direction.
According to the present invention, it is possible to store and analyze information related to the effect on the wearer by storing the wearer's line-of-sight direction. Thus, for example, when the apparatus is continuously used, stimulation can be given more effectively, such as changing the content of the image based on the recording of the wearer's line of sight.

In order to achieve the above object, the present invention provides a display system comprising a head-mounted display device and an image supply device for supplying an image to the display device, wherein the display device emits image light. Display means for outputting and visually recognizing an image; and display control means for causing the display means to display a visual function stimulus image that is supplied from the image supply device and that prompts the wearer to move the gazing point in the perspective direction. It is characterized by having.
According to the present invention, the head-mounted display device allows the wearer to visually recognize the image, thereby urging the wearer to move the gazing point in the perspective direction. Thus, the installation location can be easily secured and easily used. By using a simple display device, the visual function of the wearer can be effectively stimulated to improve the visual function and recover from fatigue. Moreover, since it is easy to change the image to be displayed, it is possible to give more effective stimulation without getting tired of the wearer.

In order to achieve the above object, the present invention is a method for controlling a head-mounted display device, which can independently display an image viewed by the wearer's left eye and an image viewed by the right eye The display device has a left image that is visually recognized by the wearer's left eye and a right image that is visually recognized by the right eye, and the left image and the right image are different from each other. A visual function stimulus image that prompts the user to move in the perspective direction is displayed, and when the visual function stimulus image is displayed by the display means, the gaze direction of the wearer is detected, and the detected gaze direction of the wearer is stored It is characterized by doing.
According to the present invention, it is possible for the wearer to visually recognize the display image and the outside scene in an overlapping manner, and since the visibility of the outside scene is adjusted, the movement of the gazing point is promoted. Can improve visual function and recover from fatigue. Since the wearer can visually recognize the outside scene, the psychological resistance of the wearer can be further reduced, and the apparatus of the present invention can be used more easily. Furthermore, by utilizing the appearance of the outside scene, it is possible to stimulate the visual function without giving an unnatural impression to the wearer. Furthermore, by storing the wearer's line-of-sight direction, information close to the actual effect on the wearer can be obtained. Thus, for example, when the apparatus is continuously used, stimulation can be given more effectively, such as changing the content of the image based on the recording of the wearer's line of sight.

  According to the present invention, it is possible to improve the visual function and recover from fatigue by giving an effective stimulus to the wearer's visual function by using a display device that can be easily secured and easily used. it can.

1 is an external view of a head-mounted display device according to an embodiment of the present invention. It is a figure which shows schematic structure of the optical system of a head mounting type display apparatus. It is a functional block diagram of a control system of a head mounted display device. It is explanatory drawing which shows the example of the visual training using a head mounting | wearing type display apparatus, (A) is a schematic diagram which shows a user's gaze direction, (B)-(D) is an example of the image for visual training. Indicates. It is explanatory drawing which shows another example of the visual training using a head mounting | wearing type display apparatus, (A) is a schematic diagram which shows a user's gaze direction, (B)-(C) are images for visual training. An example of It is explanatory drawing of the operation | movement which adjusts the visibility of an outside scene by a head mounted display apparatus, (A) shows the example which improves the visibility of an outside scene, (B) shows the example which made the visibility of an outside scene low. It is explanatory drawing of the operation | movement which measures a visual function with a head-mounted display apparatus, (A)-(D) shows the example of the image for a measurement, (E) is explanatory drawing of the operation aspect of a control apparatus. is there. It is a figure which shows typically the structural example of the data memorize | stored in a memory | storage part, (A) shows the structural example of training setting data, (B) shows the structural example of training history data. It is a flowchart which shows operation | movement of a head mounting type display apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a head-mounted display device according to an embodiment of the present invention.
The head-mounted display device HM is a head-mounted display device that is mounted on the head of a user (wearer) and is called a head mounted display (HMD). The head-mounted display device HM of the present embodiment is an optically transmissive head-mounted display device that allows a user to visually recognize a virtual image and at the same time directly view an outside scene.

As shown in FIG. 1, the head-mounted display device HM includes an image display unit 20 that is mounted on the user's head and a control device 10 that controls the image display unit 20. 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, and a right optical image display unit 26.
The right optical image display unit 26 and the left optical image display unit 28 are located in front of the user's right eye and left eye, respectively, and are connected and integrated with each other at a position corresponding to the user's eyebrow. The right holding unit 21 extends from the end ER of the right optical image display unit 26, and the left holding unit 23 extends from the end EL of the left optical image display unit 28.

The right holding part 21 is located on the side of the right side of the user, and its tip engages with the right ear of the user. Moreover, the left holding part 23 is located on the side of the left side of the user, and the tip thereof engages with the user's left ear. The head-mounted display device HM supports the tips of the right holding unit 21 and the left holding unit 23 and the nose pad provided at the lower end of the joint of the right optical image display unit 26 and the left optical image display unit 28. Is done.
A right display driving unit 22 is built in the base end of the right holding unit 21, and a left display driving unit 24 is built in the base end of the left holding unit 23. With the right display drive unit 22 and the left display drive unit 24, the head-mounted display device HM causes the user's right eye and left eye to visually recognize an image.

A dimming plate 20A is provided on the front side, that is, the front side of the right optical image display unit 26 and the left optical image display unit 28. The light control plate 20A can be attached to and detached from the right optical image display unit 26 and the left optical image display unit 28, and a plurality of types of light control plates 20A can be exchanged and mounted. The light control plate 20A is a thin plate-like optical element that has substantially no light transmission, is nearly transparent, has a light amount attenuated to transmit light, has a specific wavelength attenuated or reflected, etc. Various types can be used, and the amount of external light incident on the right optical image display unit 26 and the left optical image display unit 28 from the outside can be adjusted by appropriately selecting the optical characteristics of the light control plate 20A. In the present embodiment, a case will be described in which at least a light control plate 20A having such a light transmittance that a user wearing the head-mounted display device HM can visually recognize an outside scene is used. The light control plate 20A also has a function of protecting the right light guide plate 261 and the left light guide plate 262, which will be described later, from damage, adhesion of dirt, and the like.
Further, a camera 61 is disposed at the boundary between the right optical image display unit 26 and the left optical image display unit 28 on the front surface of the head-mounted display device HM. The position of the camera 61 is approximately the center of the front surface of the head-mounted display device HM, and is an intermediate position between the left and right eyes of the user.

The shooting direction of the camera 61, that is, the angle of view, shoots at least a part of the outside view in the direction of the user's field of view when the head-mounted display device HM is worn. It has become a direction. Preferably, the direction is to capture an outside scene in a range visually recognized by the user through the surface 262A. Further, the imaging range of the camera 61 is a range including a range visually recognized by the user through the surface 262A, and it is preferable that the entire field of view of the user through the light control plate 20A can be captured.
The camera 61 shoots a still image intermittently or captures a moving image and outputs captured image data. In the present embodiment, the camera 61 is exemplified as one digital camera, but a stereo video camera including a plurality of digital cameras may be employed.

FIG. 2 is a diagram illustrating a schematic configuration of an optical system in the image display unit 20. FIG. 2 is a plan view showing the configurations of the left display drive unit 24 and the left light guide plate 262 that allow the user's left eye LE to visually recognize a virtual image. Since each configuration for allowing the user's left eye and right eye to visually recognize a virtual image is bilaterally symmetric, only the left display drive unit 24 and the left light guide plate 262 will be described here.
The left display driving unit 24 of the image display unit 20 includes a left backlight 222 having a light source such as an LED and a diffusion plate, and a transmissive left LCD disposed on the optical path of light emitted from the diffusion plate of the left backlight 222. (Liquid Crystal Display: liquid crystal display) 242 and a left projection optical system 252 including a lens group that guides the image light L transmitted through the left LCD 242 are provided.
The left projection optical system 252 is configured by a collimating lens that converts the image light L emitted from the left LCD 242 to light beams in a parallel state. The image light L that has passed through the left projection optical system 252 enters the left light guide plate 262. The left light guide plate 262 is a prism formed with a plurality of reflecting surfaces that reflect the image light L, and the image light L is guided to the left eye LE side through a plurality of reflections inside the left light guide plate 262. The image light L reflected by the surface 262A located in front of the left eye LE is emitted from the right optical image display unit 26 toward the left eye LE, and this image light L forms an image on the retina of the left eye LE. Let the user see the image.
The left projection optical system 252 and the left light guide plate 262 are collectively referred to as “light guide unit”. As long as this light guide unit forms a virtual image in front of the user's eyes using image light, any method can be used. For example, a diffraction grating or a transflective film may be used. .

  The surface 262A is formed of a half mirror. For this reason, not only the image light L reflected by the surface 262A but also the external light OL transmitted through the light control plate 20A is incident on the user's left eye LE. That is, the head-mounted display device HM superimposes the image light L of the internally processed image and the external light OL on the eyes of the user, and for the user, the light control plate of the head-mounted display device HM. The outside scene can be seen through 20A, and the image by the image light L is visually recognized over the outside scene. That is, the head-mounted display device HM can be said to be a see-through display device.

The image light L guided to both eyes of the user of the head-mounted display device HM forms an image on the retina of the user, so that the user visually recognizes the virtual image. Here, the visibility of the outside scene and the virtual image for the user is affected by the balance of the light amount of the external light OL and the image light L. When the light amount of the external light OL is larger than the image light L, the external scene can be seen well while the head is visible. The visibility of the virtual image processed (displayed) by the part-mounted display device HM is low. On the other hand, when the light amount of the image light L is larger than the external light OL, the visibility of the virtual image processed (displayed) by the head-mounted display device HM is high, but the visibility of the outside scene is low.
For this reason, the head-mounted display device HM can change the visibility of the outside scene by changing the light amount of the image light L. As a method of changing the light amount of the image light L, for example, a method of changing the light amount emitted from the right backlight 221 and the left backlight 222 which are light sources, and a method of changing the light transmittance in the right LCD 241 and the left LCD 242. Either method may be employed, or only one of them may be employed.

In detail, the method of changing the light amount of the right backlight 221 and the left backlight 222 is a method of changing the luminance of the light source of each backlight, and a light amount adjustment mechanism for attenuating the light amount of each backlight by a dimming plate or the like. There is a method of changing the light amount by the operation of the light amount adjusting mechanism, and either method may be adopted.
The light transmittance of the right LCD 241 and the left LCD 242 is determined by the brightness of the display color of each pixel of the right LCD 241 and the left LCD 242. Therefore, by changing the color tone (brightness / darkness) of the images displayed on the right LCD 241 and the left LCD 242 as a whole, the light transmittance in each pixel can be adjusted. This adjustment can be realized by an image processing technique that changes the color tone of the image.

Returning to FIG. 1, the head-mounted display device HM includes a connection unit 40 that connects the image display unit 20 to the control device 10. The connection unit 40 includes a main body cord 48 connected to the control device 10, and two right cords 42 and a left cord 44 that branch from the main body cord 48 via a connecting member 46. The right cord 42 is inserted into the housing of the right holding unit 21 and connected to the right display driving unit 22. The left cord 44 is inserted into the housing of the left holding unit 23 and connected to the left display driving unit 24.
The image display unit 20 and the control device 10 transmit various signals via the connection unit 40. 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 device 10 is a device for operating the head-mounted display device HM. The control device 10 includes a lighting unit 12, a touch pad 14, a cross key 16, and a power switch 18.
The lighting unit 12 includes an indicator composed of an LED or the like, and notifies the operation state (for example, power ON / OFF, etc.) of the head-mounted display device HM according to the light emission state. The touch pad 14 detects a contact operation with a user's finger and outputs a signal corresponding to the detected content. The cross key 16 is a key corresponding to the up / down / left / right directions, and outputs a signal corresponding to the pressing operation. The power switch 18 is a switch for switching the power state of the head-mounted display device HM.

FIG. 3 is a functional block diagram showing the configuration of the control system of the head-mounted display device HM.
The control device 10 includes an input information acquisition unit 110, a storage unit 120, a power supply 130, a control unit 140, a communication interface 185, and transmission units (Tx) 51 and 52. The aforementioned units are connected to each other by a bus (not shown).

  The input information acquisition unit 110 acquires a signal corresponding to an input from the touch pad 14, the cross key 16, the power switch 18, and the like, for example. The storage unit 120 stores programs and data using a semiconductor memory element, a magnetic storage device, or the like. The power source 130 includes, for example, a secondary battery and supplies power to each unit of the head-mounted display device HM.

  The control unit 140 includes a CPU, a ROM, a RAM, and the like, and controls each unit of the head-mounted display device HM by executing a program stored in the ROM or the storage unit 120. The control unit 140 executes the above program, thereby causing the image processing unit 160, the training image display control unit 191 (display control means), the gaze direction detection unit 192, the image adjustment unit 193, the sound processing unit 170, and the display control unit. It also functions as 190.

  The image processing unit 160 generates a signal to be supplied to the image display unit 20 based on content input via the communication interface 185 and transmits the signal to the image display unit 20. When an analog signal is input via the communication interface 185, the image processing unit 160 performs A / D conversion processing to generate digital image data (Data), and generates a clock signal (PCLK) and a vertical synchronization signal. (VSync) and a horizontal synchronizing signal (HSync) are output. In addition, when digital image data is input to the communication interface 185, the image processing unit 160 performs various processes such as frame rate conversion and resolution conversion, and converts the processed digital image data into a clock signal, a vertical synchronization signal, and Output horizontal sync signal.

A signal output from the image processing unit 160 is input to the right display drive unit 22 of the image display unit 20 through the transmission unit 51 and input to the left display drive unit 24 through the transmission unit 52.
The display control unit 190 generates control signals 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 supplies the acquired audio signal to the right earphone 32 and the left earphone 34 of the image display unit 20 via the connection unit 40.
The interface 180 is an interface for connecting various external devices OA that are content supply sources to the control device 10. The interface 180 includes various connectors and interface circuits that are wired to the external device OA of the head-mounted display device HM, and / or a wireless communication unit and interface circuit that transmit and receive radio signals to and from the external device OA. Yes. The interface 180 can include, for example, an interface conforming to the USB standard, an interface for a memory card, a wireless communication interface conforming to a wireless LAN or Bluetooth (registered trademark) standard, another short-range wireless communication interface, or the like. Examples of the device OA include a personal computer PC, a mobile phone terminal, and a game terminal. In addition, a connector for inputting an analog signal may be provided in the interface 180.

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 camera 61. 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, a right LCD control unit 211 and a right LCD 241 that function as display elements, A projection optical system 251.
The reception unit 53 receives a signal input from the transmission unit 51. The right backlight control unit 201 drives the right backlight 221 based on the control signal input to the reception unit 53. The right LCD control unit 211 drives the right LCD 241 based on the clock signal, vertical synchronization signal, horizontal synchronization signal, and right-eye image data input to the reception unit 53. The right LCD 241 is a transmissive liquid crystal panel in which a plurality of pixels are arranged in a matrix, and is driven by the right LCD control unit 211 to draw various images.

Similarly, 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, a left LCD 242 and a left LCD 242 that function as display elements, A projection optical system 252.
The right backlight control unit 201, the right LCD control unit 211, the right backlight 221, and the right LCD 241 are collectively referred to as an “image light generation unit” on the right side, and the left backlight control unit 202 and the left LCD control unit 212. The left backlight 222 and the left LCD 242 are collectively referred to as the “image light generation unit” on the left side. Further, the right holding unit 21 and the left holding unit 23 are collectively referred to simply as “holding unit”, 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 image display unit. 26 and the left optical image display unit 28 are also simply referred to as “optical image display unit”.
The display drive unit and the image light generation unit constitute the display means of the present invention. The display means may include an optical image display unit or a light guide unit.

The reception unit 54 receives a signal input from the transmission unit 52. The left backlight control unit 202 drives the left backlight 222 based on the control signal input to the reception unit 54. The left LCD control unit 212 drives the left LCD 242 based on the clock signal, vertical synchronization signal, horizontal synchronization signal, and left-eye image data input to the reception unit 54. The left LCD 242 is a transmissive liquid crystal panel in which a plurality of pixels are arranged in a matrix, and is driven by the left LCD control unit 212 to draw various images.
In the following description, a virtual image visually recognized by the user with the head-mounted display device HM is referred to as an “image”. This image is recognized by forming an image formed on the right LCD 241 and the left LCD 242 on the retina of the user. Also, letting the user visually recognize a virtual image by the head-mounted display device HM is called “display”.

  The control unit 140 displays various content images input from the communication interface 185 on the image display unit 20, and outputs sound from the right earphones 32 and 34 together with the image display when displaying content images including sound. . Thereby, the user can view various video contents.

In the head-mounted display device HM of the present embodiment, it is possible to give a stimulus to the visual function by allowing the user to visually recognize an image for visual stimulation (visual function stimulation image).
The control unit 140 includes a training image display control unit 191. The training image display control unit 191 acquires the training image data 123 stored in the storage unit 120 and outputs the training image data 123 to the display control unit 190, thereby causing the right LCD 241 and the left LCD 242 to display the visual function stimulus image. As will be described later, the visual function stimulus image includes a still image and a moving image, and a stereoscopic image composed of a combination of a left-eye image (left image) and a right-eye image (right image) having parallax. Can be displayed. The training image display control unit 191 selects an image to be visually recognized by the user, switches the image as appropriate, and causes the right LCD 241 and the left LCD 242 to display the images.

  Although details will be described later, the visual function stimulation image is an image that prompts the wearer to move the point of sight in the perspective direction by making the left image and the right image different from each other. This is an image in which the user's eyes adjust in the perspective direction when the display is switched from the state in which the user is gazing at one image constituting the visual function stimulus image to another image of the visual function stimulus image. In other words, the visual function stimulus image may be composed of an image that changes over time or a plurality of images that are displayed by switching. The user only has to gaze at the images displayed by the right LCD 241 and the left LCD 242 each time the images are switched. As the user's eyes adjust in the perspective direction by switching the images, the user's visual function can be stimulated to improve the visual function and recover from fatigue.

The gaze direction detection unit 192 detects the user's gaze direction by controlling the gaze detection unit 189 connected to the control unit 140.
The line-of-sight detection unit 189 is hardware for detecting the direction of the line of sight of the user wearing the head-mounted display device HM, for example, an infrared camera that irradiates the user's eyes with infrared rays and images the eyeball with infrared rays, Alternatively, a measuring instrument that performs an electrical measurement of corneal-retinal potential or the like related to eye movement can be used. The line-of-sight detection unit 189 is provided inside the image display unit 20, that is, on the right eye RE and the left eye LE side, and performs imaging or measurement for detecting the direction of the line of sight for each of the right eye RE and the left eye LE. . The gaze direction detection unit 192 uses the gaze detection unit 189 to detect the gaze direction of the user. Specifically, when the line-of-sight detection unit 189 is configured with an infrared camera, the line-of-sight direction detection unit 192 analyzes the captured image data of the line-of-sight detection unit 189 and detects the pupil and the corneal reflection, thereby Is calculated. In addition, when the line-of-sight detection unit 189 is configured with a measuring instrument that performs electrical measurement such as corneal-retinal potential, the line-of-sight direction detection unit 192 performs processing for removing components other than line-of-sight movement from the measurement value, and the like. Calculate the direction.
Note that the image display unit 20 may be provided with an infrared camera or a measuring instrument constituting the line-of-sight detection unit 189 only at a position corresponding to either the right eye RE or the left eye LE. In this case, the line-of-sight direction The detection unit 192 calculates the viewing direction of either one of the right eye RE and the left eye LE. In addition, the line-of-sight direction detection unit 192 may calculate the line-of-sight direction of each of the user's right eye RE and left eye LE and output the line-of-sight direction of each eye, or the right eye RE and the left eye LE. Based on the calculated line-of-sight direction, for example, an intermediate direction of the line-of-sight direction of each eye may be obtained, and one line-of-sight direction may be obtained and output as the line-of-sight direction of both eyes. In the present embodiment, the case where the line-of-sight direction detection unit 192 outputs the line-of-sight directions of the right eye RE and the left eye LE will be described.

  The image adjustment unit 193 adjusts the image light L (the light amount of the image light L, the color tone of the image, etc.) when the training image display control unit 191 displays an image for training (visual function stimulus image). Adjust visibility. For example, the image adjustment unit 193 adjusts the light amount of the image light L and increases the light amount of the image light L to increase the visibility of the image light L and reduce the visibility of the outside scene, or the image light L Control is performed to increase the visibility of the outside scene by reducing the amount of light. The image adjusting unit 193 adjusts the light amount of the image light L by changing the light amount of the right backlight 221 and the left backlight 222 and by changing the color tone of the image drawn on the right LCD 241 and the left LCD 242. Any of these may be used.

In addition, the training image display control unit 191 can select and display a plurality of images based on the training image data 123, and the user can be more effectively selected by selecting images based on the user's past history. Can stimulate the visual sense of
The training image display control unit 191 selects an image to be displayed from images that can be displayed by the training image data 123 based on the training setting data 125 stored in the storage unit 120. The training setting data 125 is data in which the type of training that the head-mounted display device HM can provide to the user, the level of training, and the image displayed in each training are associated with each other. Based on the training setting data 125, the training image display control unit 191 can select an image corresponding to the type and level of training to be performed. Here, the level of training is an index corresponding to the intensity or difficulty level of the stimulus, and represents whether the user's visual function easily follows the change in the image.

The training image display control unit 191 acquires the gaze direction detected by the gaze direction detection unit 192 while displaying the training image, and the results stored in the storage unit 120 based on the gaze direction. Based on the determination data 127, the user's performance is determined. Specifically, the training image display control unit 191 displays an image intended to move the user's line of sight, the movement of the line of sight intended in this image, and the user's line-of-sight direction detected by the line-of-sight direction detection unit 192 The movement of the user's line of sight is compared to determine whether or not the movement of the user's line of sight is following the image, and the line of sight tracking result is determined. The training setting data 125 includes a determination reference value for determining a line-of-sight tracking result in association with the content of training (type of training, level of training, displayed image, etc.), and training image display control The unit 191 determines the line-of-sight tracking result based on the reference value of the training setting data 125 and the like.
Then, the training image display control unit 191 associates the information regarding the content of the executed training (the type of training, the level of training, the displayed image, etc.) with the line-of-sight tracking results, and stores the training unit 120 as the training history data 129. Remember me. That is, the training history data 129 is data indicating the content of training that the user has received in the past with the head-mounted display device HM and the gaze tracking result at that time. The training history data 129 may include information on training executed for each user and line-of-sight tracking results corresponding to a plurality of users.

  When the training image display control unit 191 starts displaying the training image for the user, the training image display control unit 191 refers to the training history data 129 and acquires the contents of the training performed in the past and the line-of-sight tracking result for the user. The training setting data 125 includes information for selecting an image based on the training content and the line-of-sight tracking result. In this way, the training image display control unit 191 can execute training corresponding to the past results of the user. Thereby, since the training of the level according to the state of a user's visual function can be performed, training with a high effect regarding the improvement of visual acuity and visual function fatigue recovery can be performed. In addition, since training with an appropriate degree of difficulty is performed, there is no worry of causing the user to feel burdened or tired, and the user is encouraged to continue training, and as a result, a high training effect can be expected.

Hereinafter, an example of an image for training displayed on the head-mounted display device HM will be described.
4 and 5 are explanatory diagrams illustrating examples of training using the head-mounted display device HM, and FIGS. 4A and 5A are schematic diagrams illustrating a user's line-of-sight direction. 4B to 4D and FIGS. 5B to 5C show examples of images for visual training, that is, visual function stimulation images. 5B and 5C are provided with auxiliary lines (dashed lines) indicating the vertical center and the horizontal center of the image, this auxiliary line is included in the actual image. Absent.

In the example illustrated in FIGS. 4A to 4C, an example in which an image that guides the user's gazing point in an infinite direction is displayed. In this case, as shown in FIG. 4A, the user's line of sight faces the infinity direction, so the line of sight direction R1 of the right eye RE and the line of sight direction L1 of the left eye LE are almost parallel and close to the front. It becomes. Also, the image that the right eye RE visually recognizes with the right light guide plate 261 and the image that the left eye LE visually recognizes with the left light guide plate 262 are the same. In other words, there is no left-right parallax and the convergence angle is 0. Degree.
As an image to be displayed to the user, a Landolt ring may be used, for example, as an image 351 shown in FIGS. Other figures, symbols, characters, photographs, etc. can also be used. When the image 351 is displayed, the user's line-of-sight directions R1 and L1 are directions in which the Landolt ring is watched. Based on the line-of-sight direction detected by the line-of-sight direction detection unit 192, the training image display control unit 191 determines whether the line-of-sight directions R1 and L1 are in the same direction, that is, whether the user is gazing at the Landolt ring at infinity. Is memorized and memorized as a line-of-sight tracking result.

  If it is determined that the user is not gazing at the Landolt ring while the image 351 is being displayed, it is possible that the Landolt ring is not clearly visible due to the deterioration or fatigue of the user's visual function. In such a case, the training image display control unit 191 may display an image 352 including a larger Landolt ring (FIG. 4C) according to the training setting data 125. In addition to the two images 351 and 352, a plurality of images having different sizes such as a Landolt ring can be used. In the training for guiding the line of sight toward the infinity direction, the difficulty level, that is, the level can be changed stepwise by changing the size of the gaze target (Landolt ring or the like) in the displayed image.

The head-mounted display device HM can also display an image that moves the user's line of sight in the horizontal and vertical directions. That is, the training image display control unit 191 can display a moving image 354 in which the Landolt ring moves, as schematically shown in FIG. The image 354 is an image that prompts the user to move his / her line of sight by moving the Landolt ring in the image, and includes an animation or a moving image including a plurality of still images. The training image display control unit 191 determines whether the line-of-sight directions R1 and L1 detected by the line-of-sight direction detection unit 192 during the display of the image 354 follow the movement of the Landolt ring in the image 354. In addition to the image 354, the training image display control unit 191 can use a plurality of images having different Landolt movement speeds and / or movement directions. In the training for moving the line of sight described with reference to FIG. 4D, the difficulty level, that is, the level is gradually increased by changing the moving speed and / or moving direction of the gaze target (Landolt ring or the like) in the displayed image. Can be changed. Further, the size of the gaze target may be changed depending on the level.
As indicated by the arrow in the image 354, when the Landolt ring moves around, the user's eyeball rotates as the Landolt ring moves. Depending on the content of the image 354, the speed and direction of the user's eye movement can be changed. In the image 354, the movement mode of the Landolt ring is not limited to rotation, and various movement modes such as reciprocating movement in the up and down, left and right, oblique directions, and random movement can be used. It is also possible to appropriately change the speed of movement of the Landolt ring. By following the Landolt ring of the image 354 with the eyes, the user moves the eyeball slowly, moves fast, or reciprocates in one direction. This improves the eye movement function by applying tension and relaxation to the user's extraocular muscles (upper oblique muscle, superior rectus muscle, inferior oblique muscle, inferior rectus muscle, internal rectus muscle, external rectus muscle). It is possible to recover from fatigue due to the stretch effect of the eye muscles.

  The head-mounted display device HM can also display an image that moves the user's point of interest in the perspective direction. In this case, as shown in FIG. 5A, the training image display control unit 191 alternately performs near vision that causes the user to gaze near and far vision that causes the user to gaze far away. The user's line-of-sight directions R1 and L1 move by repeating near vision and far vision, thereby stimulating the visual function.

In this training, different images are visually recognized by the user's right eye RE and left eye LE. For example, an image 355 shown in FIG. 5B is a stereoscopic image composed of an image 355A (right image) for the right eye RE and an image 355B (left image) for the left eye LE, and the left and right images 355A, 355A, There is parallax in the proximity direction between 355B. When the image 355 is displayed, it seems to the user that the gaze target (Landolt ring in this example) is at the far side position C1. The distance to the gaze target (the distance to the gaze point) is an apparent distance perceived by the user.
5C includes an image 356A (right image) for the right eye RE and an image 356B (left image) for the left eye LE, and is between the left and right images 356A and 356B. The parallax is larger than the parallax between the images 355A and 355B. When these images 355 and 356 are displayed, it appears to the user that the Landolt ring to be watched is at the position C2 on the near side, and the line-of-sight directions R1 and L1 are guided to the near position side. In addition, as the parallax of the image increases, the viewing directions R1 and L1 are guided closer to each other.
When the image 355 is watched, the convergence angle of the user's left eye LE is denoted by θ1, and the convergence angle of the right eye RE is denoted by θ3. Further, the convergence angle of the user's left eye LE when viewing the image 356 is denoted by θ2, and the convergence angle of the right eye RE is denoted by θ4. When the images 355 and 356 are switched and displayed, the gazing point changes in the perspective direction, the convergence angle of the left eye LE changes from θ1 to θ2, and the convergence angle of the right eye RE changes from θ3 to θ4. Thus, by changing the visual function stimulus image to be displayed, the convergence angle of the eye of the user gazing at the visual function stimulus image can be changed, and the visual function can be stimulated. The convergence angle also changes depending on the position of the gaze target. For example, if the display position of the Landolt ring to be watched is moved to the left without changing the parallax between the left and right images, the convergence angle of the left eye LE decreases and the convergence angle of the right eye RE increases. For this reason, the convergence angle can be changed in various ways by combining with the change of the convergence angle when changing the parallax (for example, the change from θ1 to θ2, and from θ3 to θ4), and the magnitude of the change is also arbitrary. Can be adjusted. Therefore, the user's visual function can be effectively stimulated.

  Further, as shown in FIGS. 5A to 5C, when the distance to the gazing point changes, the distance to the gazing point is controlled in the visual function stimulus image by the control of the training image display control unit 191. It may be displayed. The distance to the displayed gazing point can be a standard distance when viewing the visual function stimulus image being displayed. Further, the gaze direction detection unit 192 detects the convergence angle of the left eye LE and the right eye RE, estimates the distance from the detected convergence angle to the gaze point perceived by the user, and displays the estimated distance. Good. Further, the difference between the estimated distance and the standard distance when viewing the visual function stimulus image being displayed may be displayed. Based on this difference, it may be determined whether or not the user's visual function can cope with the content of the visual function stimulus image or the change of the visual function stimulus image, or the determination result may be displayed. In this case, the state of the user's visual function can be presented to the user. Further, these distances and determination results may be included in training history data 129 described later and stored as a history.

Although not shown here, it is of course possible to use an image in which the left and right parallax exist in opposite directions. That is, when a parallax is provided between the image for the right eye RE and the image for the left eye LE so that the gaze target is in a direction away from each other, the gaze target (Landolt ring in this example) appears far away to the user. Therefore, the line-of-sight directions R1 and L1 are guided far away.
Thus, the training image display control unit 191 can perform training for guiding the user's line of sight in the perspective direction by displaying a stereoscopic image. In addition, the position to move the gazing point can be changed stepwise between the near position and the far position, and if the gazing point is moved so as to reciprocate within a predetermined range, a higher effect can be expected. .
In this training, it is also possible to adjust the difficulty level by switching the stereoscopic image to be displayed and gradually changing the size of the gaze target that guides the user's gaze point. Further, the level may be changed by changing the size of the range in which the user's line of sight is moved, that is, the distance between the near position and the far position. In other words, the level may be changed depending on the magnitude of the parallax of the image to be displayed. The level may be changed according to the speed at which the user's line of sight is moved.

  Each of the images shown in FIGS. 4B to 4D and FIGS. 5B to 5C has an excessive stimulus to the visual function due to the moving speed and clarity when moving the display position. It may be adjusted so that there is no. That is, the user's eyes may not be fatigued by suppressing the moving speed to a relatively low speed. In addition, since a user tends to get tired when a user looks at a Landolt ring that can be clearly seen for a long time, a gaze target such as a Landolt ring included in the visual function stimulus image may not be clearly visible. For example, the entire gaze target or outline may be blurred and displayed. For these adjustments, the visual function stimulus image may be configured in advance as described above, or the image processing unit 160 performs image processing under the control of the training image display control unit 191 to realize the above adjustment. May be.

  The training image display control unit 191 may perform a display for guiding the contents and purpose of the training to the user before or during the display of the visual function stimulus image. For example, an image or text describing the content of the displayed visual function stimulus image may be displayed instead of the visual function stimulus image or together with the visual function stimulus image. In addition, before a series of exercises using a plurality of visual function stimulus images, guidance for the entire exercise and display of the contents of each visual function stimulus image may be performed together or sequentially. Moreover, you may perform the display including description of the usage method itself of the head mounted display apparatus HM. Moreover, you may perform the display which guides the effect by a visual function stimulus image, the matter which a user should be careful about, and the matter which should be known in order to raise an effect more.

The visibility of the outside scene may be adjusted by the image adjustment unit 193 in accordance with the image displayed by the training image display control unit 191.
FIG. 6 is an explanatory diagram of an operation for adjusting the visibility of the outside scene. FIG. 6A shows an example of increasing the visibility of the outside scene, and FIG. 6B shows an example of reducing the visibility of the outside scene. Reference sign VA in the figure indicates the field of view (view) of the user wearing the head-mounted display device HM, and DA indicates a displayable area by the image display unit 20. The displayable area DA indicates a range in which an image is visually recognized by the image light L, the displayable range of the right LCD 241 and the left LCD 242, the size of the right backlight 221 and the left backlight 222, the right projection optical system 251, and the left projection optical. It is determined by the optical characteristics of the system 252, the right light guide plate 261, and the left light guide plate 262. In the present embodiment, a rectangular displayable area DA exists in the approximate center of the visual field VA. The head-mounted display device HM can display an image in the displayable area DA.

As described with reference to FIGS. 5A to 5C, when the gazing point is guided in the perspective direction, the visibility of the image displayed in the displayable area DA changes depending on the gazing point. That is, when gazes at a distant place, the displayable area DA looks large as described above, so that the amount of the image light L is felt to be small, and the visibility is reduced compared to the outside scene. On the other hand, since the displayable area DA looks small when looking closely, the visibility of the image displayed in the displayable area DA becomes high.
Therefore, in order to keep the visibility of the image displayed in the displayable area DA constant, the training image display control unit 191 controls the image adjustment unit 193 according to the parallax of the image to be displayed, and increases or decreases the image light L. Let Specifically, in the case of displaying an image having parallax on the near position side, the training image display control unit 191 reduces the image light L by the image adjustment unit 193, and the outside scene as shown in FIG. Increase visibility. In the example of FIG. 6A, the image light L in the entire displayable area DA is lowered, and an outside scene can be seen in addition to the Landolt ring. Further, when displaying an image having a disparity on the far position side, the training image display control unit 191 increases the image light L by the image adjustment unit 193, thereby improving the visibility of the outside scene as shown in FIG. Reduce. Further, the training image display control unit 191 may change the adjustment amount of the image light L according to the parallax size of the image to be displayed.

  It is also possible to perform strabismus training using visual function stimulus images. In this case, the training image display control unit 191 displays a visual function stimulus image for strabismus training. The visual function stimulation image for strabismus training is an image that, for example, increases the convergence angle of the left eye LE and the right eye RE, and guides the user's eyes to a so-called crossed eye state or the like. Moreover, it is good also as a structure which displays the image where a convergence angle becomes large, and the image where a convergence angle becomes small alternately, or a structure which changes a convergence angle by an animation or a moving image. The training image display control unit 191 causes the gaze direction detection unit 192 to detect the gaze directions of the left eye LE and the right eye RE during the display of the visual function stimulus image. Then, a convergence angle is obtained from the detected line-of-sight direction, and it is determined for each of the left eye LE and the right eye RE based on the convergence angle whether the user's eyes are following the visual function stimulus image being displayed. May be. Further, the degree of follow-up may be digitized and displayed as an evaluation of the degree of achievement of training or an evaluation of the effectiveness of training, or may be included in the training history data 129 and stored as a history.

Further, the training image display control unit 191 controls the voice processing unit 170 to determine the right side based on the line-of-sight direction detected by the line-of-sight direction detection unit 192 and determines that the user is not clearly gazing at the gaze target. You may perform the process which outputs the audio | voice which calls attention from the earphone 32 and the left earphone 34, or the process which controls the display control part 190 and displays a message on an image.
In addition, the training image display control unit 191 detects a user's blink by the function of the line-of-sight direction detection unit 192 during execution of each of the above-described exercises, and alerts the user when the blink frequency falls below a predetermined level. Audio output or message display may be performed.

The training image display control unit 191 can also measure the visual function of the user. FIG. 7 is an explanatory diagram of an operation for measuring a visual function, (A) to (D) are examples of images for measurement, and (E) is an explanatory diagram of an operation mode of the control device.
Images 361 to 364 shown in FIGS. 7A to 7D are images having a Landolt ring as a gaze target, and have different sizes in which the Landolt ring is visually recognized. The user's visual function can be easily measured depending on which of the images 361 to 364 is clearly visible. The determination of whether or not the image is clearly visible is made based on the user's input operation. For example, as shown in FIG. 7E, up, down, left and right inputs are assigned to the cross key 16 provided in the control device 10 as shown by arrows in the figure. In this case, the training image display control unit 191 may display the image of the cross key 16 and guide the input method. When the training image display control unit 191 displays the images 361 to 361, the training image display control unit 191 detects the direction input by operating the cross key 16, and whether the input direction matches the opening direction of the displayed Landolt ring. Determine whether or not. If they match, it is determined that the user is clearly viewing the image, and the image is switched to an image in which the Landolt ring is viewed smaller.

FIG. 8 is a diagram schematically illustrating a configuration example of data stored in the storage unit 120. (A) illustrates a configuration example of the training setting data 125, and (B) illustrates a configuration example of the training history data 129. Show.
As illustrated in FIG. 8A, the training setting data 125 is associated with the type of training executed by the head-mounted display device HM, the level in each training, and the image displayed at each level. ing. For example, the level of training of type C that guides the user's line of sight up, down, left, and right is five levels of 1 to 5, and at level 1, a moving image is displayed that makes the gaze target turn once in the displayable area DA in 5 seconds. In level 2, a moving image that makes the gaze target make one round in 3 seconds is set to be displayed. In addition, the type of Landolt ring for each level is set for Type A training for infinite distance vision and training for guiding a gazing point in the perspective direction.

  Further, as illustrated in FIG. 8B, the training history data 129 includes the date on which the training was performed, the level and the line-of-sight tracking result for each type of training that was performed. The training history data 129 reveals the training implementation state, the training difficulty level, and the line-of-sight tracking results. The training history data 129 may include the measurement results described with reference to FIGS.

FIG. 9 is a flowchart showing the operation of the head-mounted display device HM.
When the start of training is instructed by an operation on the touch pad 14 or the cross key 16 of the control device 10 while the head-mounted display device HM is turned on (step S11), the training image display control unit 191 With reference to the training history data 129 and the training setting data 125, the content to be executed in the current training is determined (step S12).
The training image display control unit 191 reads the training image data 123 from the storage unit 120, acquires image data corresponding to the content determined in step S12 (step S13), and causes the display control unit 190 to start displaying (step S13). S14). In addition, the line-of-sight direction detection unit 192 starts detection of the user's line-of-sight direction in accordance with the start of display under the control of the training image display control unit 191, and the training image display control unit 191 detects the result of detection by the line-of-sight direction detection unit 192. Is started (step S15).

Each unit of the control unit 140 executes image display and gaze direction detection until the training is completed (step S16), and when all types of training are completed (step S16; Yes), the training image display control unit 191. Determines the line-of-sight tracking result based on the detection result of the line-of-sight direction detection unit 192 and the training setting data 125 (step S18).
Subsequently, the training image display control unit 191 determines whether or not it is necessary to change the level of training to be executed next time based on the results of the training executed in steps S14 to S16 (step S18). That is, it is determined whether or not the condition for changing the level has been achieved. In the example of FIG. 8B, for each type of training, when the line-of-sight tracking result is ◯ for two consecutive days at one level, the level of difficulty shifts to a higher level. In this way, the training image display control unit 191 determines whether or not the level has been changed in consideration of the level of training and the line-of-sight tracking performance that have been performed in the past. Information relating to the determination criteria and level change rules is included in the training setting data 125.

  When the level is changed (step S18; Yes), the training image display control unit 191 determines the content of the training to be executed next time (step S19), and the line-of-sight following for each determined content determined in step S17. The training history data 129 is updated to include the grade in the training history data 129 (step S20). When the level is not changed (step S18; No), the training image display control unit 191 updates the training history data 129 based on the various line-of-sight tracking results determined in step S17 (step S20).

  As described above, the head-mounted display device HM according to the embodiment to which the present invention is applied outputs image light to visually recognize the image, and is visually recognized by the wearer's left eye and the right eye. A display unit capable of displaying images independently, and a training image display control unit that displays a visual function stimulus image having a left image visually recognized by the wearer's left eye and a right image visually recognized by the right eye by the display unit 191 and the visual function stimulating image is an image that prompts the wearer to move the gazing point in the perspective direction by making the left image and the right image different from each other. By using the head-mounted head mounted display device HMHM that can be easily used, the visual function of the wearer can be effectively stimulated to improve the visual function and recover from fatigue. Moreover, since it is easy to change the image to be displayed, it is possible to give more effective stimulation without getting tired of the wearer.

In addition, the head-mounted display device HM includes a see-through type display unit that visually recognizes an outside scene and an image, and the image adjustment unit 193 can adjust the visibility of the outside scene. It is possible to improve visual function and recover from fatigue. Since the wearer can visually recognize the outside scene, the psychological resistance of the wearer can be further reduced, and the apparatus of the present invention can be used more easily. Furthermore, by utilizing the appearance of the outside scene, it is possible to stimulate the visual function without giving an unnatural impression to the wearer.
In addition, the training image display control unit 191 displays a stereoscopic image composed of a left image and a right image having parallax and a planar image composed of the same left image and right image as visual function stimulus images. It is possible to give a stimulus more effectively by performing various displays.
In addition, the training image display control unit 191 can display an image in which a display element to be watched such as a Landolt ring moves with time, and thus can give various stimuli to the wearer's visual function.
In addition, since it includes a gaze direction detection unit 192 that detects the gaze direction of the wearer, and a storage unit 120 that stores the gaze direction of the wearer detected when the visual function stimulus image is displayed, as training history data 129. Information about the effect on the wearer can be obtained and analyzed. Thus, for example, when the apparatus is continuously used, stimulation can be given more effectively, such as changing the content of the image based on the recording of the wearer's line of sight.

  The above-described embodiment shows an example to which the present invention is applied, and the configuration of the present invention and the scope of application of the present invention are not limited to the configuration of the above-described embodiment. For example, the specific mode of adjusting the image light L is not limited to the examples shown in FIGS. 4B, 5A, and 5B, and the image light L may be adjusted by other methods. Good. Further, the present invention is not limited to the case of displaying a normal image like the image 340 illustrated in FIGS. 4 to 5, and is generated by the head-mounted display device HM, for example, to assist the input operation of a virtual keyboard or the like. It is also possible to apply the present invention when displaying an input auxiliary image to be displayed. Further, a specific method for the gaze direction detection unit 192 and the gaze detection unit 189 to detect the user's gaze direction, a specific method for the distance detection unit 182 to detect the distance to the object located in the user's gaze direction, The method by which the image adjustment unit 193 detects the amount of external light OL is not limited to the above example, and any method can be employed.

  In the above-described embodiment, as an example of the head-mounted display device, the configuration including the image display unit 20 worn by the user like glasses is described as an example, but the present invention is limited to this. Instead of the image display unit 20, for example, an image display unit worn like a hat or an image display unit incorporated in a helmet or the like may be provided. Further, the earphones 32 and 34 may adopt an ear hook type or a headband type, or may be omitted.

  Furthermore, in the above embodiment, the image display unit 20 and the control device 10 are separated and connected by way of the connection unit 40, but the control device 10 and the image display unit 20 are integrated. It is also possible to adopt a configuration that is configured on the user's head. Further, the control device 10 and the image display unit 20 are connected by a longer cable or a wireless communication line. As the control device 10, a notebook computer, a tablet computer or a desktop computer display, a game machine, a portable phone, You may use the display etc. which a portable electronic device containing a smart phone and a portable media player, and another dedicated apparatus have.

  In the above embodiment, for example, the image light generation unit includes the left and right backlights 221, 222, the left and right backlight control units 201, 202, the left and right LCDs 241, 242 and the left and right LCD control units 211, 212. It was described as a configuration comprising The aspect of this embodiment is merely an example, and the image light generation unit may include a configuration unit for realizing another method together with the configuration unit described above or instead of the configuration unit. For example, the image light generation unit may include a self-luminous display such as an organic EL (Organic Electro-Luminescence) panel and a control unit that controls the light emission. In addition, for example, the image generation unit may use LCOS (registered trademark) (Liquid crystal on silicon), a digital micromirror device (DMD), or the like instead of the LCD. In this case, the image generation unit includes a light source such as an LED, and generates light by modulating light emitted from the light source with LCOS or DMD.

  Further, for example, the present invention can be applied to a laser retinal projection type head mounted display. In other words, the image generation unit includes a laser light source and an optical system that guides the laser light source to the user's eye, makes the laser light enter the user's eye, scans the retina, and forms an image on the retina. You may employ | adopt the structure which makes an image visually recognize. When a laser retina projection type head-mounted display is employed, the “image light emitting area in the image light generation unit” can be defined as an image area recognized by the user's eyes.

  The optical system that guides the image light generated by the image generation unit to the user's eye in the head-mounted display includes an optical member that transmits external light that is incident on the apparatus from the outside, and enters the user's eye together with the image light. Configuration can be adopted. Moreover, you may use the optical member which is located ahead of a user's eyes and overlaps a part or all of a user's visual field. Further, a scanning optical system that scans a laser beam or the like to obtain image light may be employed. Further, the optical member is not limited to guiding the image light inside the optical member, and may have only a function of guiding the image light by being refracted and / or reflected toward the user's eyes.

In addition, the present invention can be applied to a display device using MEMS display technology.
The head-mounted display device HM of the above embodiment includes left and right backlights 221, 222, left and right backlight control units 201, 202, left and right LCDs 241, 242 and left and right LCD control units 211, 212. The image light generation unit provided is used to guide the light generated by the image light generation unit to the eyes of the user by the right light guide plate 261 and the left light guide plate 262.
On the other hand, a scanning optical system using a MEMS mirror may be employed. That is, as an image display element, a signal light forming unit, a scanning optical system having a MEMS mirror that scans light emitted from the signal light forming unit, and an optical member on which a virtual image is formed by light scanned by the scanning optical system May be provided. In this configuration, the light emitted from the signal light forming unit is reflected by the MEMS mirror, enters the optical member, is guided through the optical member, and reaches the virtual image forming surface. When the MEMS mirror scans the light, a virtual image is formed on the virtual image forming surface, and the user recognizes the image when the virtual image is captured by the user's eyes. The optical component in this case may be one that guides light through a plurality of reflections, such as the right light guide plate 261 and the left light guide plate 262 of the above embodiment, and the virtual image forming surface is the surface 262A. It may be a half mirror surface.

  Furthermore, it is not limited to the structure which memorize | stores the program which the control part 140 performs in the memory | storage part 120, for example, the said program is a computer-readable portable recording medium, the memory | storage device externally connected to the control apparatus 10, or The program may be stored in a device connected to the control device 10 via a wired or wireless communication line, and the control device 10 may read and execute the program as necessary. Of course, the detailed configuration of the other head-mounted display device HM can be arbitrarily changed.

  DESCRIPTION OF SYMBOLS 10 ... Control apparatus, 14 ... Touch pad, 16 ... Cross key, 20 ... Image display part, 20A ... Light control board, 22 ... Right display drive part, 24 ... Left display drive part, 26 ... Right optical image display part, 28 ... Left optical image display unit, 61 ... Camera, 120 ... Storage unit, 140 ... Control unit, 160 ... Image processing unit, 180 ... Interface, 189 ... Gaze detection unit, 190 ... Display control unit, 191 ... Training image display control unit (Display control unit), 192 ... gaze direction detection unit (gaze detection means), 193 ... image adjustment unit, 221 ... right backlight, 222 ... left backlight, 241 ... right LCD, 242 ... left LCD, 251 ... right projection Optical system 252, left projection optical system, 261 ... right light guide plate, 262 ... left light guide plate, 262A ... surface, HM ... head-mounted display device (display device), L ... image light, OL ... external light.

Claims (9)

A head-mounted display device,
Display means for outputting image light to visually recognize an image, and capable of independently displaying an image visually recognized by the wearer's left eye and an image visually recognized by the right eye;
Display control means for displaying a visual function stimulus image having a left image visually recognized by the wearer's left eye and a right image visually recognized by the right eye by the display means,
The visual function stimulus image is an image that promotes movement of the wearer's gazing point in a perspective direction by making the left image and the right image different from each other;
A display device. The display device according to claim 1,
The display device is a see-through type display device for visually recognizing an outside scene and the image, and the visibility of the outside scene can be adjusted. The display device according to claim 1, wherein
The display control means causes the display means to display the visual function stimulation image having a convergence angle that is a convergence angle of the left eye and the right eye of the wearer. The display device according to claim 3,
The display control means causes the display means to display the visual function stimulus image that changes the convergence angle of the wearer's left eye and right eye over time. The display device according to any one of claims 1 to 4,
The display control means includes, as the visual function stimulus image, a stereoscopic image composed of the left image and the right image having parallax, and a planar image composed of the same left image and the right image. A display device, characterized by being displayed by the display means. A display device according to any one of claims 1 to 5,
The display control means is capable of displaying an image in which a display element to be watched moves as time passes, as the visual function stimulus image. The display device according to any one of claims 1 to 6,
Gaze detection means for detecting the gaze direction of the wearer;
A display device comprising: history storage means for storing the line-of-sight direction of the wearer detected by the line-of-sight detection means when the visual function stimulus image is displayed by the display means. A display system comprising a head-mounted display device and an image supply device for supplying an image to the display device,
The display device
Display means for outputting image light to visually recognize the image;
Display control means for causing the display means to display a visual function stimulus image that is supplied from the image supply device and that prompts the wearer to move the point of sight in the perspective direction;
A display system characterized by comprising: A method for controlling a head-mounted display device,
By a display means capable of independently displaying an image viewed by the wearer's left eye and an image viewed by the right eye,
The left image visually recognized by the wearer's left eye and the right image visually recognized by the right eye, and by making the left image and the right image different from each other, Display a visual stimulus image that encourages movement,
Detecting the visual line direction of the wearer when the visual function stimulus image is displayed by the display means;
Storing the detected gaze direction of the wearer;
A control method of a display device characterized by the above.

Images