JP2008165057A - Head mounted display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head mounted display whose design is not spoiled. <P>SOLUTION: The head mounted display 1 has a case 10 including a display, and a free curved surface prism 20 guiding light from the display to user's eyes and also enlarging an image displayed on the display. The case 10 is attached to spectacles 100 so as to be positioned behind the spectacles 100, whereby the head mounted display 1 is nearly hidden behind the lenses 102 of the spectacles as seen from the front when the case 10 is attached to be positioned behind the spectacles 100. By such a head mounted display 1, most of the head mounted display 1 is not seen from the front of the spectacles 100 when the case 10 is attached to the rear of the spectacles 100, so that the head mounted display 1 does not project from the spectacles, and its design is not spoiled. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a head mounted display used by being attached to a spectacle-shaped mounting member.

In recent years, a small-sized head-mounted display that is used by being attached to spectacles has been proposed and used in various fields including virtual reality.
Various structures of such a head mounted display have been proposed. Among them, there is a head mounted display using a free-form surface prism. The free-form surface prism has, for example, a substantially triangular cross-section surrounded by three surfaces of the first surface, the second surface, and the third surface, and has entered by reflecting light twice inside the prism. To change the direction of light and to magnify the original image of the incoming light by reflecting the light twice inside and refraction twice when putting it in and out. It is supposed to change the light. Simply put, a free-form surface prism has both the functions of a prism and a lens.
Such a head-mounted display is generally mounted and used so as to be positioned in front of the glasses (the one far from the user's body when the glasses are worn by the user). There are some that are used by being attached so as to be positioned close to the user's body when wearing the glasses.

Such a head-mounted display includes a display for displaying an image and at least a part of the display in front of at least one eye of the user when the head-mounted display is used. And a prism for enlarging an image displayed on the display.
The prism has, for example, three surfaces, a first surface, a second surface, and a third surface, and allows light from the display to pass through the first surface, and reflects the light that has passed through the first surface on the second surface, The light reflected by the second surface is reflected by the third surface, and the light reflected by the third surface is passed through the second surface, thereby changing the direction of the light guided to the inside and displaying on the display. It is a free-form surface prism for enlarging a captured image.
The display is arranged so as to be positioned above or below the free-form surface prism.
JP 2001-133724 A

  However, in the head-mounted display in which the display is positioned above or below the free-form surface prism as described above, when the user wears spectacles with the head-mounted display attached, the head-mounted display is separated from the spectacles. It sometimes protrudes and cannot be said to be excellent in design.

  This invention makes it the subject to provide the head mounted display which does not impair design property.

  The present inventor proposes the following invention in order to solve the above-mentioned problems.

The present invention provides the following head mounted display.
The head-mounted display of the present invention is a head-mounted display that is used by being attached to a spectacle-shaped mounting member having a spectacle lens.
The head mounted display has a main body including an image display means for displaying an image, and at least a part of the head mounted display is positioned in front of at least one eye of the user when the mounting member is mounted on the user. Light guide means for guiding the at least one eye of the user while enlarging the image from the image display means, and the main body is located behind the mounting member, on the mounting member. When viewed from the front, the head mounted display is attached to a position that is substantially hidden by the mounting member.
According to such a head mounted display, when the main body is mounted behind the glasses, most of the head mounted display is not visible from the front of the glasses, so the head mounted display may protrude from the glasses. There is no loss of design.

  The light guide means reflects the image emitted from the image display means one or more times and guides the image to the position of the user's eye when the mounting member is mounted; and the image Enlargement means for enlarging the image emitted from the display means to a predetermined size.

  For example, the light guiding means includes a first lens for enlarging the image from the image display means, a first reflecting means for reflecting the enlarged image from the first lens in a predetermined direction, and the first There may be provided a second reflecting means for reflecting the image reflected by the one reflecting means in another predetermined direction, and a second lens for enlarging the image reflected by the second reflecting means. .

  Specifically, for example, when the image emitted from the image display unit is input, the light guide unit reflects the image a predetermined number of times and expands the image to a predetermined size. It can be a free-form curved prism that leads to the user's eyes when the mounting member is mounted.

The free-form surface prism has four surfaces of a first surface, a second surface, a third surface, and a fourth surface, allows light from the image display means to pass through the first surface, and allows the first surface to pass through. The reflected light is reflected by the second surface, the light reflected by the second surface is reflected by the third surface, and the light reflected by the third surface is allowed to pass through the fourth surface. The direction of the light guided to the inside may be changed, and the image displayed on the image display means may be enlarged.
The first surface to the fourth surface may be non-continuous surfaces, but at least two of the first surface to the fourth surface (for example, the second surface and the fourth surface) are continuous. It may be a smoothly connected surface.

  The main body and the light guide means are arranged so that the light guide means is located behind the spectacle lens of the attachment member when the main body is attached to a substantially center in the width direction of the mounting member. It can be connected.

Specifically, the image display means is formed in a substantially rectangular shape, and the main body is attached so that the short side direction of the image display means is substantially parallel to the height direction of the spectacle lens of the mounting member. It may be done.
In the conventional head mounted display as described above, when the main body is mounted inside the spectacles, the display and the free-form surface prism are provided so as to be adjacent in the height direction of the spectacle lens. As a whole, it has a shape extending in the height direction of the eyeglass lens. On the other hand, the spectacle lens usually has a shape whose width is longer than its height, so when the main body is mounted inside the spectacles, the head-mounted display protrudes from the spectacles.
On the other hand, the main body of the head-mounted display of the present application can be attached to the approximate center in the width direction of the spectacle-shaped mounting member, and the main body is positioned behind the spectacle-shaped mounting member. Is attached to the spectacle-shaped mounting member, the light guide means is positioned behind the lens of the spectacle-shaped mounting member, and the shape of the entire head-mounted display extends in the width direction of the spectacle lens. Therefore, when the main body is mounted so as to be located behind the glasses, the head mounted display can be prevented from protruding from the glasses.
In addition, the head mounted display of the present application has a shape extending in the width direction of the eyeglass lens as the entire shape of the head mounted display, and does not block the entire visual field in the vertical direction (left and right direction) of the user. Even when the image displayed on the light means is viewed, the periphery of the light guide means is slightly blurred but visible. Therefore, a simple operation can be performed even when the line of sight is directed to the light guide means, which is convenient. In addition, it is safe to see the foot even when the line of sight is directed to the light guide means. Furthermore, if the line of sight is removed from the light guide means, the surroundings can be better seen.

  The main body may be attached such that the long side direction of the image display means is inclined with respect to the width direction of the spectacle lens of the mounting member. If mounted in this way, the thickness of the head mounted display in the front-rear direction when the head mounted display is mounted so as to be located behind the glasses can be reduced, and the design is more excellent. can do.

The image display unit may further include an image display moving unit for moving the image display unit back and forth in the image emission direction.
If such image display moving means is provided, the direction of light emission from the image display means to the light guide means is not changed (the direction of light from the image display means to the light guide means, that is, the optical axis is The image display means can be moved closer to or away from the light guiding means without shifting. That is, it can adjust so that the image suitable for a user's visual acuity can be displayed.

You may further have the light guide movement means for sliding the said light guide means in the predetermined range between the center of the width direction of the said mounting member, and the wisdom part of the said mounting member.
If such a light guide moving means is provided, the position of the image display means can be moved to a place suitable for the eye position for each user, and the position of the image display means can be adjusted as appropriate.

  Only one image display unit and one light guide unit may be provided, or two image display units and two light guide units may be provided. That is, it has two pairs of the image display means and the light guide means, and at least part of the light guide means of the pair is the user when the attachment member is attached to the user. The other pair of light guiding means is positioned in front of the left eye of the user when the mounting member is mounted on the user. Also good.

  ADVANTAGE OF THE INVENTION According to this invention, the head mounted display which does not impair design property can be provided.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the head mounted display 1 in this embodiment is used by being attached to eyeglasses 100 as an example of a mounting member.
The head mounted display 1 is attached to the back of the glasses 100.

  The spectacles 100 have the same configuration as normal spectacles in which a spectacle lens 102 is fitted in a spectacle frame 101. The spectacle frame 101 includes left and right temples 103, left and right rims 104, and a bridge 105 that connects the left and right rims 104. The left and right vines 103 are hinged to the left and right rims 104, respectively, so that the vine 103 can be folded in a direction parallel to the rim 104. The eyeglasses 100 are fixed to the user's head by locking the tip of the vine 103 to both ears of the user or by sandwiching the user's head with the two vines 103.

  In this embodiment, since the head mounted display 1 is located behind the spectacles 100, the length of the vine 103 is longer than that of a normal spectacle frame. Moreover, the tip of the vine 103 may be formed so as to be easily locked to the user's ear, but the linear shape does not change the user's feeling of use regardless of the presence of the head mounted display 1.

The head mounted display 1 includes a case 10 having a display inside, left and right free-form curved prisms 20 connected to the case 10 via a movable portion 16, and a nose pad 30 connected to the case 10. .
The case 10 is attached to the bridge 105 of the glasses 100 so as to be positioned behind the glasses 100. The free-form curved prism 20 is connected to the case 10 so as to be aligned in the width direction of the case 10 when viewed from the user when the user wears the glasses 100. The nose pad 30 is attached so as to be located further rearward of the case 10, and prevents the glasses 100 from being displaced at the time of wearing by being applied to the user's nose at the time of wearing. The image displayed on the display is magnified at a predetermined magnification by the free-form surface prism 20 and output backward from the free-form surface prism 20. The image output rearward enters the eyes of the user wearing the glasses 100.

  The head mounted display 1 is attached to the glasses 100 as shown in FIG. A first attachment member 40 is formed on the bridge 105 of the glasses 100. In this embodiment, the first mounting member 40 includes a first shaft portion 40a connected to the bridge 105 and a first ball portion 40b provided at the tip of the first shaft portion 40a. The first mounting member 40 may be formed integrally with the spectacles 100, but in order to be able to use a general-purpose spectacle frame as the spectacles 100, so that it can be attached to the spectacles 100 with an adhesive or the like, It is better to form the eyeglasses 100 as a separate member.

  The case 10 of the head mounted display 1 has a first fitting hole 10a formed on the surface of the glasses 100 side. At the time of attachment to the spectacles 100, a so-called ball joint is formed in which the first ball portion 40b of the first attachment member 40 is fitted into the first fitting hole 10a.

  A second mounting member 50 having the same configuration and size as the first mounting member 40 is formed on the surface of the case 10 opposite to the surface on which the first fitting hole 10a is provided. The second mounting member 50 includes a second shaft portion 50a connected to the case 10 and a second ball portion 50b provided at the tip of the second shaft portion 50a. The second attachment member 50 may be formed integrally with the case 10, but may be attached to the case 10 with an adhesive or the like.

  A second fitting hole 30 a is formed in a portion of the nose pad 30 connected to the case 10. The second fitting hole 30a is the same size as the first fitting hole 10a. At the time of attachment to the case 10, a so-called ball joint is formed in which the second ball portion 50b of the second attachment member 50 is fitted into the second fitting hole 30a.

  The first mounting member 40 and the second mounting member 50, and the first fitting hole 10a and the second fitting hole 30a are formed in the same shape and size, respectively. For this purpose, the first ball portion 40b of the first mounting member 40 can be fitted into the second fitting hole 30a. Thereby, except for the case 10, the movable part 16, and the free-form surface prism 20, only the nose pad 30 can be directly attached to the spectacles 100 and used as a normal spectacle frame.

Hereinafter, the configuration of each member of the head mounted display 1 will be described in detail.
The case 10 has a substantially rectangular hollow shape. The case 10 is not necessarily so, but is made of resin in the present embodiment. FIG. 3 shows a top view of the case 10.

  On the upper surface of the case 10, a diopter adjustment knob 12 for adjusting the diopter and a prism position adjustment knob 13 for adjusting the position of the free-form surface prism 20 are provided.

  The diopter adjustment knob 12 is operated to move the display inside the case 10 forward and backward in the image emission direction (optical axis direction). In the present embodiment, two are provided so that the diopter of each of the left and right eyes can be adjusted.

  The prism position adjustment knob 13 is operated to move the position of the free-form surface prism 20 with respect to the case 10 within a predetermined range. A scale is provided in the vicinity of the prism position adjustment knob 13 so that the amount of movement of the free-form surface prism 20 relative to the amount of operation of the prism position adjustment knob 13 can be intuitively understood.

FIG. 4 is a partial cross-sectional view of the inside of the case 10 when the case 10 is viewed from above.
The case 10 includes a diopter adjustment knob 12, a diopter adjustment plate 11, a display 14, a control board 15, a diopter adjustment knob 12, a diopter adjustment board 11, a display 14 and a control board 15. A movable part 16 connected to the free-form surface prism 20 and a pinion part 17 are provided.
In the present embodiment, two movable parts 16 and two free-form surface prisms 20 are described as being provided. However, this is not necessarily the case, and one may be provided. That is, in addition to those for both eyes, a configuration used only for one of the right eye and the left eye may be used.

  The display 14 displays an image. In this embodiment, the display 14 is a rectangular liquid crystal display. In this embodiment, in the present embodiment, when the case 10 is attached to the spectacles 100, the short side direction thereof is substantially parallel to the height direction of the spectacle lens 102 and is inclined with respect to the width direction of the spectacle lens 102. In addition, it is attached to the movable part 16.

  The control board 15 controls an image displayed on the display 14. The control board 15 sends data for displaying an image to the display 14 and causes the display 14 to display an appropriate image. The control board 15 receives image data from an external device (not shown) and displays it on the display 14. The control board 15 receives data about an image from an external device (not shown) by wire or wireless.

  As the external device, for example, a hard disk player, a DVD player, a television broadcast tuner, a personal computer, a mobile phone, a game device for executing a computer game, an MP3 player having an image processing function, or the like can be used. .

The movable unit 16 is disposed at an angle whose axial direction is substantially parallel to the optical axis direction of the image displayed on the display 14. When the display 14 displays an image, the light about the image is a free-form surface prism. The free-form surface prism 20 is supported so as to be sent to 20.
The movable portion 16 has a rack portion 16 a that extends substantially parallel to a surface facing the glasses 100 when the case 10 is attached to the glasses 100. Each rack portion 16 a has teeth formed on the surface facing the pinion portion 17.

The pinion unit 17 is connected to the prism position adjustment knob 13, and when the prism position adjustment knob 13 rotates, the pinion unit 17 also rotates. The pinion part 17 has a cylindrical shape, and teeth parallel to the axial direction of the cylinder are formed on the side surface. The teeth of the pinion portion 17 and the teeth of the rack portion 16a are engaged with each other, and the rack portion 16a moves in accordance with the rotation of the pinion portion 17.
That is, as shown in FIG. 5, when the prism position adjustment knob 13 is rotated to the left, the base end of the rack portion 16a is separated from the pinion portion 17 and slides in the direction in which the two movable portions 16 are separated. Conversely, when the prism position adjustment knob 13 is rotated to the right, the base end of the rack portion 16a approaches the pinion portion 17, and the two movable portions 16 slide in the approaching direction. Since the movable part 16 and the free curved surface prism 20 are connected, the free curved surface prism 20 slides in the same manner as the movable part 16 slides. In this way, by rotating the prism position adjustment knob 13, when the case 10 is attached to the spectacles 100, the free-form surface prism 20 attached to the movable portion 16 is moved in the width direction of the spectacles 100 (the bridge 105 and the spectacles 100. It can be slid (within a predetermined range). As the free-form surface prism 20 slides, the position of the image output from the free-form surface prism 20 also slides. Thereby, the position where the image is output can be matched with the position of the user's eyes.
The pinion unit 17 may be configured integrally with the prism position adjustment knob 13. The rack portion 16a and the pinion portion 17 constitute a moving mechanism that slides the free-form curved prism 20 between the bridge 105 and the wisdom.

  The diopter adjustment knob 12 and the diopter adjustment plate 11 included in the movable unit 16 are adjustments for changing the distance from the display 14 to the free-form surface prism 20 to provide an image that matches the diopter of the user. Configure the mechanism.

FIG. 6 is a diagram for explaining the adjustment mechanism in detail by enlarging the movable portion 16. FIG. 7 is a diagram for explaining the operation of the adjustment mechanism.
The diopter adjustment knob 12 has a groove formed in the head that protrudes to the outside of the case 10, and has a crank portion 12a that is bent in a crank shape in the middle. When a flat plate is inserted into the groove on the head and rotated, the crank portion 12a rotates around the center of rotation.
The diopter adjustment plate 11 has one side connected to the control board 15, and has a chamfered rectangular adjustment hole 11a provided with a long side in the direction in which the one side extends in the vicinity of the side facing the one side. Is provided. A crank portion 12a of the diopter adjustment knob 12 is provided through the adjustment hole 11a. The short side of the adjustment hole 11a is formed with a length corresponding to the size of the crank portion 12a.

When the diopter adjustment knob 12 is rotated in the state of FIG. 7, the crank portion 12a rotates around the rotation center. Since the crank hole 12a passes through the adjustment hole 11a, when the crank part 12a rotates, the adjustment hole 11a is biased toward the control board 15 according to the movement. For this purpose, the diopter adjustment plate 11 moves in a direction in which the control board 15 is urged. Since the control board 15 moves, the display 14 moves in the direction of the free-form curved prism 20. The diopter can be adjusted by making the distance between the display 14 and the free-form surface prism 20 variable.
Since the diopter adjustment knob 12 rotates, the diopter adjustment plate 11 moves like a piston. For this reason, the display 14 does not move too much and collides with the free-form surface prism 20 so that they are not damaged.
The user can adjust the position of the display 14 to the optimum position for the diopter of his / her eyes by rotating the diopter adjustment knob 12 during use.

  FIG. 8 is a diagram for explaining a light guide path formed by the free-form curved prism 20. The free-form surface prism 20 guides light from the display 14 to at least one eye of the user and enlarges an image displayed on the display 14.

  The free-form surface prism 20 is configured in a substantially triangular cross section having three surfaces, ie, a first surface S1, a second surface S2, and a third surface S3, each of which is a free-form surface.

  The first surface S <b> 1 faces the display 14, and passes light from the display 14 for the image displayed on the display 14 and guides it into the free-form surface prism 20. The light from the display 14 is refracted when passing through the first surface S1, and changes so that the image displayed on the display 14 is enlarged.

  The second surface S2 reflects the light that has passed through the first surface S1 (usually total reflection). The light that has passed through the first surface S1 changes its direction greatly by being reflected by the second surface S2, and changes so that the image displayed on the display 14 is enlarged. The second surface S2 also allows light reflected by the third surface S3 to pass through. This will be described later.

  The third surface S3 reflects the light reflected by the second surface S2. The light reflected by the second surface S2 changes its direction greatly by being reflected by the third surface S3, and changes so that the image displayed on the display 14 is enlarged. The reflection performed on the third surface S3 may be total reflection or metal reflection. When the reflection performed on the third surface S3 is total reflection, the third surface S3 is set so that the incident angle when the light reflected on the second surface S2 reaches the third surface S3 is equal to or less than the total reflection angle. The curved surface is designed. When the reflection performed on the third surface S3 is a reflection by a metal, the metal is attached to the outside of the third surface S3, for example, by vapor deposition. A dielectric multilayer film can be formed on the outside of the third surface S3 instead of depositing metal. In this case, reflection is performed by a dielectric multilayer film.

As described above, the light reflected by the third surface S3 goes again to the second surface S2 and passes through the second surface S2. The light passing through the second surface S2 is refracted when passing through the second surface S2, and changes so that the image displayed on the display 14 is enlarged. The image displayed on the display 14 is displayed on the dotted line portion of the free-form surface prism 20, as shown in FIG.
When the case 10 is attached to the glasses 100, at least a part of the free-form prism 20 as described above is positioned in front of at least one eye of the user when the head mounted display 1 is used. Is connected to the case 10 so as to emit light from the user's eyes.
Specifically, when the case 10 is attached to the glasses 100, the free-form surface prism 20 is not disposed adjacent to the case 10 in the height direction, but is disposed adjacent to the case 10 in the width direction. Is done. That is, the overall shape of the head mounted display 1 is a shape that extends in the width direction of the glasses 100.

FIGS. 10a and 10b are diagrams illustrating a state in which the eyeglasses 100 with the head mounted display 1 attached are viewed from the front (away from the user's body when the eyeglasses 100 are put on by the user).
As shown in these drawings, when the eyeglasses 100 with the head mounted display 1 attached are viewed from the front, the head mounted display 1 is substantially hidden behind the eyeglass lens 102.
Therefore, according to the head-mounted display 1 of the present embodiment, the entire shape of the head-mounted display 1 is a shape that extends in the width direction of the spectacle lens 102. Therefore, when the case 10 is attached to the back of the spectacles 100, Thus, most of the head mounted display 1 can be prevented from being seen from the front of the glasses 100. That is, the head mounted display 1 can be attached so as not to protrude from the glasses 100, and the design is not impaired.
Further, the head mounted display 1 of the present embodiment has a shape extending in the width direction of the spectacle lens 102 as the entire shape of the head mounted display 1 and does not block the entire visual field in the vertical direction (left and right direction) of the user. Therefore, even when the image displayed on the free-form surface prism 20 is viewed, the periphery of the free-form surface prism 20 is slightly blurred but is visible. Therefore, a simple operation can be performed even when the line of sight is directed to the free-form curved prism 20, which is convenient. Further, even when the line of sight is directed to the free-form surface prism 20, the feet can be seen, which is safe. Furthermore, if the line of sight is removed from the free-form surface prism 20, the surroundings can be seen better.

Next, a method for using the head mounted display 1 will be described.
In order to use the head-mounted display 1, the glasses 100 with the head-mounted display 1 attached are fixed to the user's head. The spectacles 100 with the head mounted display 1 attached thereto are fixed to the user's head as described above by locking the vine 103 of the spectacles 100 to the user's ear or by the vine 103 of the spectacles 100. This is done by pinching the user's head.

In this state, the user operates the external device to input data about the image to be displayed on the head mounted display 1 to the head mounted display 1.
The control board 15 displays an image on the display 14 according to data about the image.
The light of the image displayed on the display 14 exits the display 14 and is input to the first surface S1 of the free-form surface prism 20. In the free-form surface prism 20, light is emitted from the second surface S2 as shown in FIG.
The emitted light allows the user to see an image enlarged to an appropriate size with both eyes.
At this time, the user rotates the diopter adjustment knob 12 so as not to change the direction of light from the display 14 to the free-form surface prism 20 (without shifting the optical axis). The display 14 can be moved closer or away. That is, the display 14 can be moved back and forth in the image emission direction. Thereby, it can adjust so that the image suitable for a user's visual acuity can be displayed.
Further, the user can move the position of the display 14 to a place suitable for the position of the eye for each user by rotating the prism position adjustment knob 13, and can appropriately adjust the position of the display 14. .
Moreover, the user can listen to the sound combined with the image by wearing an earphone (not shown) on the ear.

  In this embodiment, the case 10 is described as being attached to the center of the bridge 105 of the spectacles 100. However, the case 10 may be attached to the spectacles 100 so as to be positioned behind the spectacles 100. The case 10 may be attached to other parts of the glasses 100. Further, a locking member that locks the case 10 to any part of the glasses 100 may be seen from the front.

Further, in the present embodiment, the light guide means of the present invention has been described using the free-form curved prism 20 having a substantially triangular cross section. However, at least a part of the prism is used by the user when the head mounted display 1 is used. What is supposed to be positioned in front of at least one eye, guides the light from the display 14 to at least one eye of the user, and enlarges the image displayed on the display 14 A thing may be used.
For example, there are four surfaces, a first surface, a second surface, a third surface, and a fourth surface. The light from the display 14 is allowed to pass through the first surface, and the light that has passed through the first surface is the second surface. The light reflected by the second surface and reflected by the second surface is reflected by the third surface, and the light reflected by the third surface is passed through the fourth surface, thereby changing the direction of the light guided to the inside. A free-form curved prism that enlarges the image displayed on the display 14 may be used.
The first to fourth surfaces may be non-continuous surfaces, but at least two of the first to fourth surfaces may be continuous and smoothly connected surfaces. In the present embodiment, the second surface and the fourth surface are continuous and smoothly connected surfaces.

  Specifically, as shown in FIG. 11, the light guide means reflects the light from the first lens 71 that enlarges the image from the display 14 and the first lens 71, and changes the direction of the light. The first reflecting mirror 72, the second reflecting mirror 73 that reflects the light reflected by the first reflecting mirror 72, changes the direction of the light, and transmits the light from the second reflecting mirror 73 and enlarges the image. The second lens 74 may be included. The number of reflections and how much the image is enlarged depends on the display 14 and the position of the user's eyes.

Further, as shown in FIG. 12, the light guide means may include the free curved surface prism 20 and at least one of the lens 75 or the lens 76. The lens 75 and the lens 76 are for enlarging the image displayed on the display 14. These lenses 75 and 76 will be described as being plate-like lenses, but are not limited thereto, and any lenses may be used as long as they function as lenses that partially change the refractive index. .
The lens 75 is attached to any position between the display 14 and the first surface S1 of the free-form surface prism 20, and light from the display 14 passes through the lens 75 and the first surface of the free-form surface prism 20. Input is made to the surface S1. The light passing through the lens 75 is refracted during the passage and changes so that the image displayed on the display 14 is enlarged. That is, such a lens 75 can enlarge an image displayed on the display 14 before entering the free-form surface prism 20.
The lens 76 is affixed to the outside of the second surface S2 of the free-form surface prism 20, and light from the display 14 emitted from the second surface S2 of the free-form surface prism 20 passes through the lens 76 to the user. The light is emitted to the eyes. The light passing through the lens 76 is refracted at the time of passing and changes so that the image displayed on the display 14 is enlarged. That is, by such a lens 76, the image displayed on the display 14 emitted from the free-form surface prism 20 can be enlarged to an appropriate size and emitted to the user's eyes.

  In the present embodiment, the case 10 is configured to include a diopter adjustment knob 12 that adjusts the diopter and a prism position adjustment knob 13 that adjusts the position of the free-form surface prism 20. Is not essential, and may be configured so as not to include them.

  Moreover, although the spectacles 100 to which the above head mounted display 1 is attached are described as being commercially available glasses in the present embodiment, they are not such commercially available glasses but are spectacles dedicated to the head mounted display 1. Also good. For example, the earphone may be a pair of glasses that are built into the vine of the glasses.

The figure which shows the state which attached the head mounted display of this embodiment to spectacles. The figure which shows the head mounted display of this embodiment, and spectacles. The top view of a case. The partial cross section figure which shows the structure of the case of this embodiment. Operation | movement explanatory drawing of a moving mechanism. The detailed block diagram of an adjustment mechanism. Operation | movement explanatory drawing of an adjustment mechanism. Explanatory drawing of the light guide in a free-form surface prism. The figure which looked at the head mounted display of this embodiment from back. The figure which looked at the spectacles of the state which attached the head mounted display of this embodiment from the front. The figure which looked at the spectacles of the state which attached the head mounted display of this embodiment from the front. The figure which shows the modification of the free curved surface prism of this invention. The figure which shows the modification of the free curved surface prism of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Head mounted display 10 Case 10a 1st fitting hole 11 Diopter adjustment board 11a Adjustment hole 12 Diopter adjustment knob 13 Prism position adjustment knob 14 Display 15 Control board 16 Movable part 16a Rack part 17 Pinion part 20 Free-form surface prism 30 Nose Pad 30a Second fitting hole 40 First mounting member 50 Second mounting member 75, 76 Lens

Claims (11)

A head-mounted display used by being attached to a spectacle-shaped mounting member having a spectacle lens,
A main body including image display means for displaying an image;
At least a part of the mounting member is positioned in front of at least one eye of the user when the mounting member is mounted on the user, and the image of the user is enlarged while the image of the user is enlarged. Light guide means for guiding to at least one eye,
The main body is behind the mounting member,
When viewed from the front of the mounting member, the head mounted display is attached to a position that is substantially hidden by the mounting member.
Head mounted display. The light guiding means includes
One or more reflecting means for reflecting the image emitted from the image display means one or more times to guide the position of the user's eyes when the mounting member is mounted;
Magnifying means for enlarging the image emitted from the image display means to a predetermined size,
The head mounted display according to claim 1. The light guiding means includes
A first lens for enlarging the image from the image display means;
First reflecting means for reflecting the magnified image from the first lens in a predetermined direction;
Second reflecting means for reflecting the image reflected by the first reflecting means in another predetermined direction;
A second lens for enlarging the image reflected by the second reflecting means.
The head mounted display according to claim 2. The light guiding means includes
When an image emitted from the image display means is input, the image is reflected within the image a predetermined number of times and enlarged to a predetermined size. A free-form curved prism to guide,
The head mounted display according to claim 2 or 3. The free-form surface prism is
The first surface, the second surface, the third surface, and the fourth surface have four surfaces, the light from the image display means is allowed to pass through the first surface, and the light that has passed through the first surface is The light reflected by the second surface, the light reflected by the second surface is reflected by the third surface, and the light reflected by the third surface is guided through the fourth surface by passing through the fourth surface. While changing the direction of the light, the image displayed on the image display means is enlarged.
The head mounted display according to claim 4. The main body and the light guide means are arranged so that the light guide means is located behind the spectacle lens of the attachment member when the main body is attached to a substantially center in the width direction of the mounting member. It is connected,
The head mounted display according to any one of claims 1 to 5. The image display means is formed in a substantially rectangular shape,
The main body is attached so that the short side direction of the image display means is substantially parallel to the height direction of the spectacle lens of the mounting member.
The head mounted display according to claim 6. The main body is attached such that the long side direction of the image display means is oblique to the width direction of the spectacle lens of the mounting member.
The head mounted display according to claim 6 or 7. The image display means further includes an image display moving means for moving the image display means forward and backward in the emission direction of the image.
The head mounted display according to any one of claims 1 to 8. A light guide moving means for sliding the light guide means within a predetermined range between a center in the width direction of the mounting member and a wisdom portion of the mounting member;
The head mounted display according to claim 6. It has two pairs of the image display means and the light guide means,
One pair of light guiding means is at least partly located in front of the right eye of the user when the mounting member is mounted on the user,
The other pair of light guiding means is at least partially positioned in front of the user's left eye when the mounting member is mounted on the user.
The head mounted display according to any one of claims 1 to 10.

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