JP7235146B2 - Head-mounted display and display system - Google Patents

Description

The present invention relates to head-mounted display devices and display systems.

In recent years, many glasses-type head-mounted display devices (head-mounted displays (HMD), VR (Virtual Reality) goggles, VR glasses, smart glasses, AR (Augmented Reality) glasses, glass displays, glass devices etc.) have been developed. By displaying a virtual image on the display in front of you or superimposing a virtual image on the real background, you can get an experience that is completely different from that of conventional desktop displays, smartphones, and tablet terminals. Head-mounted display devices are mainly classified into the following three types.

The first is a type in which the display is in front of the eyes and viewed directly or through a lens. This type is used in a head mount display for binocular non-transmissive VR display, a small monocular head mount display, or the like. For example, the first type is a binocular non-transmissive head that enables large-screen display with a viewing angle of 90 degrees or more by installing two units of image display elements on the left and right sides, a driving circuit, and an optical system in front of the eyes. A mount display has been disclosed (see Patent Document 1). In addition, a compact monocular type head-mounted display has been disclosed in which only one unit of a compact image display device, a drive circuit and an optical system are mounted in front of the eyes, and the weight can be reduced to about 30 g (see Patent Document 2). reference).

The second type is a type in which image light emitted from an image display device is projected and reflected by a semi-transmissive device such as a mirror or a half mirror in front of the eye. In this type, since the image display element and the semi-transmissive element such as a mirror or half mirror can be installed separately, the weight in front of the eye can be reduced by arranging the image display element behind the eyeball surface. You can reduce the burden on your nose. For example, as a second type, a display device has been disclosed in which image light is projected from the side of the face onto a semi-transmissive element such as a mirror or a half mirror in front of the user's eyes (see Patent Document 3).

The third type is a type in which image light emitted from an image display element is viewed through a light guide plate. This type is used, for example, in a head-mounted display for binocular transmissive AR display. In this type, image light emitted from an image display element is guided to a light guide plate by a collimating lens or mirror, and made incident on the eye through the light guide plate. Thus, by passing the image light through the light guide plate, it is possible to display an image with a viewing angle of 20 degrees or more, and depending on the structure of the light guide plate, it is possible to display a large image with a viewing angle of about 60 degrees. For example, as a third type, there is disclosed a display device having a structure in which an image display element, a collimating lens, a mirror, and a light guide plate are integrated, and the center of gravity of the structure is positioned in front of the surface of the eyeball. (See Patent Documents 4 to 6).

However, the first type has the following problems. For example, a binocular non-transmissive head-mounted display such as that described in Patent Document 1 is capable of displaying a large screen with a viewing angle of 90 degrees or more. are installed in front of the eyes, the total weight in front of the eyes is often 500 g or more. Therefore, it is difficult to keep wearing a heavy structure for a long time. In addition, it is difficult to fold or disassemble the structure of the binocular non-transmissive head-mounted display, and the structure is bulky when carried. In addition, the small monocular type head-mounted display as described in Patent Document 2 has a small image display element, a driving circuit and an optical system mounted in front of the eyes, so it weighs about 30 g, although it is light. Since the viewing angle is about 15 degrees, the display screen is small and the range of use is limited. In addition, since the above-mentioned compact monocular head-mounted display has a structure in which the image display device and the optical system are integrated, it cannot be folded compactly when carrying.

In addition, the second type has the following problems. For example, the display device described in Patent Document 3 projects from the side of the face onto a semi-transmissive element such as a mirror or a half mirror in front of the eye, so it is difficult to display a large screen. In addition, this type of display can only display a small screen with a viewing angle of 10 degrees or less, even if it is currently publicized.

In addition, the third type has the following problems. For example, the display devices described in Patent Documents 4 to 6 have a structure in which an image display element, a collimating lens, a mirror, and a light guide plate are integrated, so that the center of gravity of the structure is in front of the surface of the eyeball. Therefore, there are at least the following three problems.

The first problem is the load bearing on the nose. Specifically, the display devices as described in Patent Documents 4 to 6 have a structure in which an image display element, a collimating lens, a mirror, and a light guide plate are integrated, so the weight is about 40 g to 100 g. . Further, the weight ratio between the nose pad and the ear pad is 8:2 to 9:1 from the position of the center of gravity, and a load of about 30 g to 80 g is applied to the nose pad portion. Since the load on the nose pad of the glasses for correcting myopia is about 10 g, the load applied to the nose is 3 to 8 times that of normal glasses for correcting myopia. Therefore, if the structure is worn for a long time, the skin around the nose pad may become inflamed and cause pain.

The second problem is that of the field of view. The binocular transmissive head-mounted display is used by simultaneously viewing image display information while looking at the real world, or by AR superimposing images, so it is assumed that the user walks or works while wearing the display. However, the display devices described in Patent Documents 4 to 6 have a structure in which an image display element, a collimating lens, a mirror, and a light guide plate are integrated. It has a form that blocks the field of view. The general human field of vision is 180 degrees or more, but wearing this structure may reduce it to 100 degrees or less, so it is dangerous to move or work in a narrow field of view. Safety during installation may decrease.

The third problem is that of size. A head-mounted display is effective for large-screen display on the go, but it is also an important factor that the shape is compact so that it can be carried easily. For example, the head-mounted display may be folded for portability, or may be easily disassembled or assembled. However, the display devices described in Patent Documents 4 to 6 are not compact in shape because the image display device, collimator lens, mirror and light guide plate are integrated, and for example, they have a structure that cannot be folded or disassembled. It's becoming

The present invention has been made in view of the above, and enables a large screen display in front of the eyes, reduces the load on the nose when worn, and secures the left and right peripheral vision of the wearer. Another object of the present invention is to provide a head-mounted display device and a display system that can be compact in shape.

In order to solve the above-described problems and achieve the object, the present invention provides a temple, an optical system for propagating a light beam emitted from a light source along the temple , and an angle of the light beam propagated from the optical system. and a light guide plate that guides the luminous flux whose angle has been changed by the mirror to the wearer's pupil, wherein the reflecting surface of the mirror is different from the pupil-side surface of the light guide plate and is arranged to be inclined with respect to the pupil-side surface of the light guide plate. The light is incident on the light guide plate from the outside of the temple .

According to the present invention, it is possible to display a large screen in front of the eyes, reduce the load on the nose when worn, secure the left and right peripheral vision of the wearer, and make the shape compact. can be done.

FIG. 1 is a diagram showing an example of the configuration of a display system including a head-mounted display device according to the first embodiment. FIG. 2 is a diagram showing an example of the operation of the micromirror device of the head-mounted display device according to the second embodiment. FIG. 3 is a diagram showing an example of the operation of the micromirror device of the head-mounted display device according to the second embodiment. FIG. 4 is a diagram showing an example of the operation of the micromirror device of the head-mounted display device according to the second embodiment. FIG. 5 is a diagram showing an example of the configuration of a head-mounted display device according to the third embodiment. FIG. 6 is a diagram showing an example of the configuration of a head-mounted display device according to the fourth embodiment.

Embodiments of a head-mounted display device and a display system will be described in detail below with reference to the accompanying drawings. In addition, in each embodiment and drawing, the same code|symbol may be attached|subjected to the same component and the overlapping description may be abbreviate|omitted.

(First embodiment)
FIG. 1 is a diagram showing an example of the configuration of a display system 1 including a head-mounted display device 10 according to the first embodiment. Here, the head-mounted display device 10 shown in FIG. 1 has a form similar to general eyeglasses, but is not limited to this form.

As shown in FIG. 1 , the display system 1 includes a laser light source 20 and a head-mounted display device 10 . The head-mounted display device 10 is a device worn by a wearer. The laser light source 20 is a device that is not worn by the wearer, and emits laser light to the head-mounted display device 10 .

The head-mounted display device 10 includes light guide plates 100a and 100b, an optical fiber 200, micromirror devices 300a and 300b, a bridge 400, and temples 500a and 500b.

The temples 500a and 500b are members that touch the wearer's left and right ears, and are attached to one end portions 150a and 150b of the left and right light guide plates 100a and 100b, respectively. The temples 500a and 500b support the head-mounted display device 10 so that the head-mounted display device 10 does not fall from the wearer by hanging over the ears of the wearer.

The bridge 400 is a member that connects the other ends of the left and right light guide plates 100a and 100b and hangs over the wearer's nose. Pads (nose pads) are attached to the bridge 400 for supporting the head-mounted display device 10 with both sides of the wearer's nose sandwiched therebetween.

A portion of the optical fiber 200 is provided along each of the temples 500a and 500b. A portion of the optical fiber 200 is hereinafter referred to as optical fibers 200a and 200b. The optical fibers 200a and 200b are attached to one ends 150a and 150b of the left and right light guide plates 100a and 100b, respectively. The optical fibers 200 a and 200 b propagate laser light emitted from the laser light source 20 .

Micromirror devices 300a, 300b change the angle of laser light propagated from optical fibers 200a, 200b. The micromirror devices 300a, 300b respectively have micromirrors 310a, 310b and mirror controllers 320a, 320b. The mirror controllers 320a and 320b change the angles of the micromirrors 310a and 310b so that the incident angles of the laser beams to the light guide plates 100a and 100b are changed, respectively.

The light guide plates 100a and 100b respectively have light guide portions 110a and 110b and reflection portions 120a and 120b in their bodies. The light guide portions 110a and 110b are portions that guide the laser beams whose angles are changed by the micromirror devices 300a and 300b while totally reflecting the laser beams. The reflecting portions 120a and 120b are portions that reflect the laser beams guided by the light guiding portions 110a and 110b so as to guide them to the wearer's pupils 800a and 800b.

In the light guide plates 100a and 100b, one end portions 150a and 150b have, for example, a triangular shape when the head-mounted display device 10 is viewed from above, and have a first surface, a second surface, and a third surface. have. The first surfaces of the one end portions 150a and 150b are surfaces in contact with the bodies of the light guide plates 100a and 100b, respectively. The second surfaces of the one ends 150a and 150b are, for example, surfaces orthogonal to the first surfaces, and temples 500a and 500b and optical fibers 200a and 200b are attached thereto. A third surface of one end 150a, 150b is a surface that intersects the first surface and the second surface, respectively, and has micromirror devices 300a, 300b mounted thereon, facing micromirrors 310a, 310b.

Due to the shapes of the light guide plates 100a and 100b, the micromirror devices 300a and 300b are arranged on the sides opposite to the sides of the light guide plates 100a and 100b that guide the laser light to the pupils 800a and 800b, respectively.

Processing of the head-mounted display device 10 according to the first embodiment will be described. First, light emitted from the laser light source 20 is guided to the light guide plates 100a and 100b by the optical fibers 200a and 200b. Next, the micromirror devices 300a and 300b located on the surfaces (outer surfaces) of the light guide plates 100a and 100b opposite to the pupils 800a and 800b are irradiated with light. The laser beams reflected by the micromirror devices 300a and 300b are guided through the light guide plates 100a and 100b and enter the pupils 800a and 800b. Here, since the micromirror devices 300a and 300b are devices in which the angles of the mirrors change at high speed, by changing the angles of the mirrors according to the image signals, the apparatus can recognize images from the light guide plates 100a and 100b. can.

As described above, the head-mounted display device 10 according to the first embodiment has a structure including the micromirror devices 300a and 300b. The left and right peripheral vision can be secured, and the shape can be made compact.

For example, conventional head-mounted display devices (named as head-mounted displays (HMD), VR goggles, VR glasses, smart glasses, AR glasses, glass displays, glass devices, etc.) have image display elements such as light sources, displays, and lenses. is a one-piece, large, heavy structure. With the recent development of display technology, microdisplays with a screen size of 0.5 inches or less with 1280×720 pixels are being manufactured. , the weight is more than 20g.

On the other hand, since the head-mounted display device 10 according to the first embodiment does not have the laser light source 20, the laser light source 20 is not worn by the wearer. In addition, since the head-mounted display device 10 according to the first embodiment has a structure including the micromirror devices 300a and 300b without using a collimator lens or the like, angle changes of the micromirror devices 300a and 300b Image light can enter the light guide plates 100a and 100b only by The head-mounted display device 10 is 10 g or less including the control portion of the micromirror devices 300a and 300b, and is a small and lightweight head-mounted display device. As described above, the head-mounted display device 10 according to the first embodiment can reduce the weight burden on the nose and ears, and can be worn continuously for a long time. In addition, since the head-mounted display device 10 according to the first embodiment does not use a collimator lens or the like, it is possible to ensure the left and right peripheral vision of the wearer. Further, in the head-mounted display device 10 according to the first embodiment, the micromirror devices 300a and 300b are arranged on the sides of the light guide plates 100a and 100b opposite to the sides of the light guide plates 100a and 100b that guide the laser light to the pupils 800a and 800b. Therefore, the shape can be made compact.

Here, the parts for supplying power to the micromirror devices 300a and 300b and for transmitting image signals may be inside or outside the head-mounted display device 10. It is desirable that it is located outside the head-mounted display device 10 and connected by wire. For example, a power supply line and a signal line for transmitting an image signal run in parallel with the optical fibers 200a and 200b, and a power supply and an image control unit may be provided alongside the laser light source 20. FIG.

Moreover, since the head-mounted display device 10 according to the first embodiment has a structure including the light guide plates 100a and 100b, it is possible to display on a large screen.

For example, as a head-mounted display device using the laser light source 20 and the micromirror devices 300a and 300b, a retinal projection display device that directly forms an image of the laser light source on the user's retina is generally known. Retinal projection display devices are characterized by being able to focus regardless of the user's vision or vision correction conditions, but on the other hand, miniaturization is required, such as using a large reflecting mirror to focus the laser light on the retina. difficult. It is also difficult to display on a large screen. The head-mounted display device 10 according to the first embodiment is not of a retinal projection type but has a structure including the light guide plates 100a and 100b. enable display. The light guide plates 100a and 100b include various types such as a type using a half mirror, a type using a pologram element, and a type having a geometric structure such as multistage reflection, and any of them may be used.

Here, the laser light source 20 may be a general one, but since the laser light is directed into the eye, it is necessary to sufficiently manage the light intensity. It is desirable to have a stopper structure that prevents the light intensity from exceeding a certain level. The head-mounted display device 10 according to the first embodiment can display characters and symbols such as arrows even in a single color, so it is sufficiently valuable as an information assist function. can be used to display full color by switching at high speed. If full-color display is possible, many expressions such as images and moving images can be expressed, and the utility value can be greatly increased. Although there are three types of lasers, only one optical fiber 200 is required if a high-speed switching mechanism is provided on the light source side.

Either glass or plastic may be used for the optical fibers 200a and 200b. Glass is highly durable, and plastic is lightweight, so the selection may be made according to the application. Since the light emitted from the optical fibers 200a and 200b must surely irradiate the micromirror devices 300a and 300b, it is desirable to fix them to the temples 500a and 500b so that their positions and angles do not shift.

As described above, the head-mounted display device 10 according to the first embodiment enables large-screen display in front of the eyes, reduces the load on the nose when worn, , and the shape can be made compact.

In the first embodiment, the surfaces of the light guide plates 100a and 100b of the head-mounted display device 10 on the side opposite to the eyes are provided with a mechanism for switching between the non-transmissive state and the transmissive or semi-transmissive state. good too. As a switching mechanism, a light shielding plate like sunglasses may be attached to the front surfaces of the light guide plates 100a and 100b via a movable member such as a hinge. If a non-transmissive device is desired to display VR, a light blocking plate is placed in front of the light guide plates 100a and 100b. Further, if a transmissive device for AR display is desired, the light blocking plate should be moved vertically and horizontally so that it is not positioned in front of the light guide plates 100a and 100b.

Further, in the first embodiment, as a mechanism for switching between the transmissive state and the transmissive or semi-transmissive state, a light control element capable of electrically switching between the transmissive state and the non-transmissive state may be used. Light control elements include liquid crystal elements, electrochromic elements, and the like. In particular, the electrochromic element has a large contrast between the transmissive state and the non-transmissive state, and can be switched between a non-transmissive device with a sense of immersion and a transmissive device with high visibility in the real world.

In the first embodiment, the head-mounted display device 10 also includes a camera used for taking an image of the outside, detecting a position, checking an object, etc., as well as the user's posture, motion direction, orientation, and the like. A sensor may be included for detecting. When two cameras are installed at the positions of both ends of the head-mounted display device 10, the two captured images are misaligned. By obtaining the parallax from the obtained image, the distance between the head-mounted display device 10 and the object can be obtained.

Further, in the first embodiment, the head-mounted display device 10 may be provided with a 9-axis sensor (acceleration, angular velocity, geomagnetism). By adding a 9-axis sensor, the direction and tilt of the head of the person (wearer) wearing the head-mounted display device 10 can be grasped in real time, and an object can be displayed according to the direction and tilt of the head. It can be set or erased.

Also, in the first embodiment, the head-mounted display device 10 may be provided with a depth sensor. By adding a depth sensor, it is possible to grasp where in the real space the person (wearer) wearing the head-mounted display device 10 is. or fixed. Moreover, even when the person wearing the head-mounted display device 10 moves, the real space can be grasped, so the fixed object can be displayed without moving to a different position.

Also, in the first embodiment, the head-mounted display device 10 may be provided with an eye tracker. By adding an eye tracker, it is possible to know where the line of sight of the person (wearer) wearing the head-mounted display device 10 is directed, so that the characters and objects seen can be recognized, and appropriate additional information can be obtained. (popup) can be displayed.

Further, in the first embodiment, the head-mounted display device 10 may be provided with a bone conduction speaker. By providing the bone conduction speaker, the worker (wearer) wearing the head-mounted display device 10 can listen to guidance and instructions from a remote location without covering his/her ears, so work can be performed efficiently. You can move forward and hear the surrounding sounds at the same time, so you can work safely.

In the first embodiment, the head-mounted display device 10 shown in FIG. 1 is a binocular glasses-type head-mounted display, but is not limited to this. It may be a display. Moreover, the head-mounted display device 10 may be worn directly like glasses, but may also be attached to a helmet, cap, or the like, or may be used by putting it in goggles or the like.

(Second embodiment)
The head-mounted display device 10 according to the second embodiment will be described with a focus on the differences from the head-mounted display device 10 according to the first embodiment.

2 to 4 are diagrams showing an example of operations of the micromirror devices 300a and 300b of the head-mounted display device 10 according to the second embodiment. Here, FIGS. 2 to 4 omit illustration of the right side mechanism, that is, the right side light guide plate 100b, the optical fiber 200b, the micromirror device 300b, and the temple 500b.

In the head-mounted display device 10 according to the second embodiment, each of the micromirror devices 300a and 300b has one micromirror 310a and 310b that operates two-dimensionally. By using only one micromirror 310a, 310b in each micromirror device 300a, 300b, the size of the device is reduced and the control is simplified. Therefore, the control board on which the micromirrors 310a and 310b and the mirror controllers 320a and 320b are mounted can also be made smaller.

For example, as shown in FIGS. 2, 3, and 4, by changing the angles of the micromirrors 310a and 310b, the incident angles of the laser beams to the light guide plates 100a and 100b can be changed. The exit angle from is changed. By performing angular scanning of the micromirrors 310a and 310b at high speed, a two-dimensional image can be seen in the wearer's pupils 800a and 800b due to the afterimage effect. By using the micromirror devices 300a and 300b capable of controlling the swing angle of the mirror to ±15 degrees, light can be incident on the light guide plates 100a and 100b at an angle of ±30 degrees, which is twice the swing angle. It is possible (because the incident angle and reflection angle to the mirror are 15 degrees each). Therefore, the image light emitted from the light guide plates 100a and 100b has a wide viewing angle of 60 degrees, and can display an image with a larger area than the conventional head-mounted display device.

Also, although the number of pixels depends on the diameter of the laser and the flashing speed, it is sufficiently possible to draw full HD (1920×1080 pixels) at a frequency of 60 Hz. It is superior to existing micro displays such as liquid crystal and organic EL (Electro-Luminescence).

(Third Embodiment)
The head-mounted display device 10 according to the third embodiment will be described, focusing on the differences from the head-mounted display device 10 according to the second embodiment.

FIG. 5 is a diagram showing an example of the configuration of the head-mounted display device 10 according to the third embodiment. The head-mounted display device 10 according to the third embodiment has a mechanism for folding or removing the temples 500a and 500b. For example, as the mechanism, hinge portions 600a and 600b are provided at the contact portions between the light guide plates 100a and 100b and the temples 500a and 500b, respectively.

Here, the conventional head-mounted display device has a structure in which a microdisplay, a lens, and light guide plates 100a and 100b are integrated, and are fixed by a housing so that the optical axis does not deviate. Therefore, unlike general corrective spectacles, the lenses and the temples 500a and 500b cannot be bent and stored in a small size. Even if a folding mechanism is provided at the temples 500a and 500b behind the microdisplay, a width of about 50 mm is required and the storage case becomes large. The head-mounted display device 10 is expected to be used in places such as when going out, outdoors, or at a work site, rather than desk work in an office, and the convenience of portability is an important factor.

In the configuration of the head-mounted display device 10 according to the third embodiment, the micromirror devices 300a and 300b are attached to the outer surfaces of the light guide plates 100a and 100b, and the optical fibers 200a and 200b are arranged in parallel with the temples 500a and 500b. and power/signal cables, so if the optical fibers 200a and 200b and the power/signal cables are fixed to the temples 500a and 500b, the light guide plates 100a and 100b and the temples 500a and 500b can be separated. be able to. For example, if hinge parts 600a and 600b are attached and a folding mechanism is attached like general corrective eyeglasses, the thickness of the light guide plates 100a and 100b and the width of the temples 500a and 500b can be folded, resulting in a width of about 30 mm. can be done. Moreover, if a mechanism for removing the temples 500a and 500b is provided, they can be stored more compactly.

(Fourth embodiment)
The head-mounted display device 10 according to the fourth embodiment will be described, focusing on the differences from the head-mounted display device 10 according to the third embodiment.

FIG. 6 is a diagram showing an example of the configuration of the head-mounted display device 10 according to the fourth embodiment. The head-mounted display device 10 according to the fourth embodiment has a mechanism that does not emit laser light when the temples 500a and 500b are folded or removed. For example, as the mechanism, the above mechanism is provided at each of the contact portions between the light guide plates 100a and 100b and the temples 500a and 500b. Since the head-mounted display device 10 according to the fourth embodiment uses the laser light source 20, it must be handled more carefully. In particular, if the laser beam is emitted while the device is not in use, it is dangerous because there is a possibility that the laser beam may enter the eye directly by mistake. Therefore, when the temples 500a and 500b are folded when the head-mounted display device 10 is not in use, or when the temples 500a and 500b are removed, the mechanism for preventing the laser beam from being emitted is Useful.

Any mechanism may be used. For example, a sensor is provided at each contact portion between the light guide plates 100a and 100b and the temples 500a and 500b, and the light guide plates 100a and 100b and the temples 500a and 500b are brought closer than a certain amount. It is conceivable to send a control signal to the laser light source 20 to turn on the laser light source 20 or to prohibit the laser light from entering the light guide plates 100a and 100b only when the laser light source 20 is turned on. Alternatively, push-type switches 700a and 700b are provided at the contact portions between the light guide plates 100a and 100b and the temples 500a and 500b, respectively, and the push-type switches 700a and 700b are turned on when the temples 500a and 500b come into contact with the light guide plates 100a and 100b. It is conceivable to send a control signal to the laser light source 20 to turn on the laser light source 20 or to prohibit the laser light from entering the light guide plates 100a and 100b only when the laser light source 20 is turned on.

As described above, the display system 1 includes a laser light source 20 and a head-mounted display device 10. The head-mounted display device 10 includes light guide plates 100a and 100b, an optical fiber 200, a micromirror device 300a, 300b, a bridge 400, and temples 500a and 500b. An embodiment of the display system 1 including the head-mounted display device 10 will now be described.

(Example 1)
In Example 1, the laser light source 20, the micromirror devices 300a and 300b, the light guide plates 100a and 100b, and the optical fiber 200 are arranged as shown in FIG.
・Light guide plates 100a, 100b: Acrylic resin, thickness 5 mm, length 45 mm, height 25 mm, half mirror at an angle of 45 degrees ・Laser light source 20: Sumitomo Electric RGB CAN unit (SLM-RGB-T20-F)
・Optical fiber 200: Mitsubishi Cable Industries ST100E
・Micromirror device 300a, 300b: Hamamatsu Photonics S12237-03P

<Implementation content>
The micromirror devices 300a and 300b swing by ±15 degrees in the X and Y axis directions. By scanning the XY axes at 180 Hz, laser beams of RGB wavelengths were sequentially incident on the light guide plate. The laser lighted 1920 dots while scanning the X axis once, and lit 1080 dots while scanning the Y axis once. The laser intensity was adjusted in 256 steps from a maximum of 30 microwatts to 0 for gradation display.

<Implementation result>
The size of the micromirror devices 300a and 300b including the control board was about 14 mm×8 mm×4 mm, and when installed at the corners of the light guide plates 100a and 100b, they did not block the field of view. The weight was also about 5 g, which was light. When an image was displayed according to a desired image signal, the wearer could see a large screen equivalent to a viewing angle of 60 degrees through the light guide plate.

(Example 2)
In the second embodiment, the head-mounted display device 10 has hinge portions 600a and 600b provided at contact portions between the light guide plates 100a and 100b and the temples 500a and 500b, respectively, in contrast to the configuration of the first embodiment. there is In Example 2, the hinge portions 600a and 600b are arranged as shown in FIG.
・Hinges 600a, 600b: Sugatsune Industry HG-TS type

<Implementation result>
The temples 500a and 500b are folded at the hinge portions 600a and 600b, resulting in a compact size (width of 28 mm).

(Example 3)
In the third embodiment, the head-mounted display device 10 is provided with push-type switches 700a and 700b provided at contact portions between the light guide plates 100a and 100b and the temples 500a and 500b, respectively, in contrast to the configuration of the second embodiment. ing. In Example 3, push-type switches 700a and 700b are arranged as shown in FIG.
Push type switches 700a, 700b: Leye electronics

<Implementation content>
The push-type switches 700a and 700b and the switch of the laser light source 20 are interlocked so that the switch of the laser light source 20 is not turned on unless the push-type switches 700a and 700b are turned on.

<Implementation result>
When the temples 500a and 500b were folded at the hinge portions 600a and 600b, the push-type switches 700a and 700b were not turned on, and the laser light source 20 did not erroneously emit light.

1 Display System 10 Head Mounted Display Device 20 Laser Light Source 100a, 100b Light Guide Plate 110a, 110b Light Guide Section 120a, 120b Reflector 150a, 150b One End 200, 200a, 200b Optical Fiber 300a, 300b Micromirror Device 310a, 310b Micro Mirrors 320a, 320b Mirror control section 400 Bridge 500a, 500b Temples 600a, 600b Hinge sections 700a, 700b Push-type switches 800a, 800b Pupils

WO2015/137165 JP 2011-227379 A JP 2015-219405 A JP 2007-094175 A JP 2013-200553 A JP 2013-210633 A

Claims (9)

a temple;
an optical system that propagates a light beam emitted from a light source along the temple ;
a mirror that changes the angle of the light beam propagated from the optical system;
a light guide plate that guides the light flux whose angle has been changed by the mirror to the pupil of the wearer;
has
the reflecting surface of the mirror is a surface different from the pupil-side surface of the light guide plate, and is arranged to be inclined with respect to the pupil-side surface of the light guide plate;
The head-mounted display device according to claim 1, wherein the mirror is arranged outside the temple, and causes the light flux propagated from the optical system to enter the light guide plate from outside the temple. 2. The head-mounted display device according to claim 1, wherein one end of said light guide plate is triangular and has first and second surfaces orthogonal to each other and a third surface intersecting them. 3. A head-mounted display device according to claim 2, wherein said optical system and said temple are in contact with said second surface, and said mirror is arranged on said third surface side. 4. The head-mounted display device according to any one of claims 1 to 3 , wherein the mirror has one mirror that operates two-dimensionally. a mechanism for folding or unfolding the temple ;
5. The head-mounted display device according to any one of claims 1 to 4 , further comprising: a mechanism in which the light flux is not emitted when the temple is folded or removed;
6. The head mounted display of claim 5 , further comprising: Having a hinge portion that folds the temple inward,
The optical system deviates from the second surface at a position outside the temple on the side opposite to the direction in which the temple is folded, and is brought into contact with the second surface by returning to the position before the temple is folded. 4. The head-mounted display device according to claim 3. 8. The head-mounted display device according to claim 1, wherein said light guide plate has a plurality of reflecting portions. a head-mounted display device according to any one of claims 1 to 8, which is worn by a wearer;
a light source, which is a device that is not worn by the wearer and that emits a light beam to the head-mounted display device;
a power source for driving the mirror;
display system.

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