JP2019159286A - Head-mounted display device and display system - Google Patents

Abstract

To provide a head-mounted display device capable of performing large screen display in front of an eye, further reducing a load to a nose in attachment, securing the left and right peripheral visual fields of a wearer, and obtaining a compact shape.SOLUTION: The head-mounted display device includes an optical fiber for propagating laser light emitted from a laser light source, a micromirror device for changing the angle of the laser light propagated from the optical fiber, and a light guide plate for guiding the laser light whose angle is changed by the micromirror device to the pupil of the wearer. The micromirror device is arranged on the side opposite to the side where the laser light is guided to the pupil of the light guide plate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a head-mounted display device and a display system.

  In recent years, many glasses-type head-mounted display devices (head-mounted display (HMD), VR (Virtual Reality) goggles, VR glasses, smart glasses, AR (Augmented Reality) glasses, glass displays, glass devices depending on the shape) Etc.) have been developed. By displaying a virtual image on a display in front of the eyes or displaying a virtual image superimposed on a real background, it is possible to obtain a completely different experience from conventional desktop displays, smartphones, and tablet terminals. Head-mounted display devices are mainly divided into the following three types.

  The first is a type in which the display is in front of the eyes and is viewed directly or through a lens. This type is used in a head-mounted display for binocular non-transmissive VR display or a small monocular head-mounted display. For example, as a first type, a binocular non-transmissive head that can display a large screen with a viewing angle of 90 degrees or more by installing two units of left and right image display elements, a drive circuit, and an optical system in front of each eye. A mount display is disclosed (see Patent Document 1). In addition, a small monocular head-mounted display is disclosed in which only one unit of a small image display element, a drive circuit, and an optical system is 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 the image display element is projected and reflected by a transflective element such as a mirror or a half mirror in front of the eyes. This type can be installed separately from the image display element and a semi-transmission element such as a mirror or a half mirror, so that the weight in front of the eye is reduced by placing the image display element behind the eyeball surface, The burden on the nose can be reduced. For example, as a second type, a display device that projects image light from the side of a face to a semi-transmissive element such as a mirror in front of the eyes or a half mirror is disclosed (see Patent Document 3).

  The third type is a type in which image light emitted from the image display element is viewed through a light guide plate. This type is used in, for example, a head mounted display that performs binocular transmission 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 a mirror, and is incident on the eye through the light guide plate. Thus, by passing image light through the light guide plate, an image display with a viewing angle of 20 degrees or more is possible, and depending on the structure of the light guide plate, a large image display with a viewing angle of about 60 degrees is also possible. For example, as a third type, 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 located in front of the eyeball surface is disclosed. (See Patent Documents 4 to 6).

  However, the first type has the following problems. For example, a binocular non-transmissive head-mounted display as described in Patent Document 1 can display a large screen with a viewing angle of 90 degrees or more, but has two units of left and right image display elements, a drive circuit, and an optical system. Since each has a structure that is placed in front of the eyes, the total weight in front of the eyes is often 500 g or more. Therefore, it is difficult to continue wearing a heavy structure for a long time. The binocular non-transmissive head-mounted display is difficult to fold or disassemble the structure and is bulky when carried. In addition, a small monocular head-mounted display as described in Patent Document 2 has only one unit of a small image display element, a drive circuit, and an optical system mounted in front of the eyes, so the weight is as light as about 30 g. Since the viewing angle is about 15 degrees, the display screen is small and the range of use is limited. In addition, the small monocular head-mounted display has a structure in which the image display element and the optical system are integrated, and therefore cannot be compactly folded when being carried.

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

  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 eyeball surface. Therefore, there are at least the following three problems.

  The first problem is the load burden on the nose. Specifically, since 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, the weight is approximately 40 g to 100 g. . Furthermore, 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 is about 10 g in the myopia correction glasses, the load on the nose is 3 to 8 times that of the normal myopia correction glasses. For this reason, when the structure is worn for a long time, the skin near the nose pad may be inflamed and painful.

  The second problem is related to the field of view. The binocular transmissive head-mounted display is used on the premise of walking or working while wearing it in order to view image display information simultaneously while viewing the real world or to superimpose images on an AR. However, since the display devices described in Patent Documents 4 to 6 have a structure in which an image display element, a collimator lens, a mirror, and a light guide plate are integrated, the structure has a left and right periphery of the wearer. It has a form that closes the field of vision. The general human field of view is 180 degrees or more, but if the structure is mounted, it may drop to 100 degrees or less, so it is dangerous to move or work in a narrow field of view, Safety during installation may be reduced.

  The third problem is a size problem. The head mounted display is effective when displaying a large screen on the go, but it is also important to have a compact shape so that it can be easily carried. For example, the head-mounted display may be folded for carrying or easily disassembled or assembled. However, the display devices described in Patent Documents 4 to 6 are not compact in shape because the image display element, the collimating lens, the mirror, and the light guide plate are integrated. For example, the display device cannot be folded or disassembled. It has become.

  The present invention has been made in view of the above, 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 display system that can be compact in shape.

  In order to solve the above-described problems and achieve the object, the present invention provides an optical fiber that propagates laser light emitted from a laser light source, a micromirror device that changes the angle of the laser light propagated from the optical fiber, A light guide plate that guides the laser light whose angle has been changed by the mirror device to the pupil of the wearer, and that the micromirror device is disposed on the opposite side of the light guide plate from the side that guides the laser light to the pupil. Features.

  According to the present invention, it is possible to display a large screen in front of the eyes, reduce the load applied to the nose at the time of wearing, secure the left and right peripheral vision of the wearer, and make the shape compact. Can do.

FIG. 1 is a diagram illustrating an example of a configuration of a display system including a head-mounted display device according to the first embodiment. FIG. 2 is a diagram illustrating 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 illustrating 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 illustrating 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 illustrating an example of the configuration of the head-mounted display device according to the third embodiment. FIG. 6 is a diagram illustrating an example of the configuration of the 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. Note that, in each embodiment and drawing, the same components are denoted by the same reference numerals, and redundant description may be omitted.

(First embodiment)
FIG. 1 is a diagram illustrating an example of a 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 that of general glasses, 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 applied to the left and right ears of the wearer, 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 being applied to the ears of the wearer.

  The bridge 400 is a member that connects the other end portions of the left and right light guide plates 100a and 100b and is applied to the wearer's nose. The bridge 400 is attached with a pad (nose pad) for supporting the head-mounted display device 10 with the wearer's nose sandwiched from both sides.

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

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

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

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

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

  Processing of the head-mounted display device 10 according to the first embodiment will be described. First, the 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) opposite to the pupils 800a and 800b of the light guide plates 100a and 100b are irradiated with light. The laser light reflected by the micromirror devices 300a and 300b is guided through the light guide plates 100a and 100b and enters the pupils 800a and 800b. Here, since the micromirror devices 300a and 300b are devices that change the mirror angle at a high speed, the apparatus can be recognized as an image from the light guide plates 100a and 100b by changing the mirror angle according to the image signal. it 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. Therefore, the load applied to the nose at the time of wearing is reduced. Right and left peripheral vision can be secured and the shape can be made compact.

  For example, a conventional head-mounted display device (referred to as head-mounted display (HMD), VR goggles, VR glasses, smart glasses, AR glasses, glass displays, glass devices, etc.) has a light source, a display, and a lens as image display elements. Is a one-piece, large and heavy structure. Due to recent developments in display technology, microdisplays with a screen size of 1280 x 720 and a screen size of 0.5 inches or less have been manufactured. However, when the light source and lens are packaged together, it becomes a housing of 20 mm or more per side. The weight is also 20 g or more.

  On the other hand, since the head-mounted display device 10 according to the first embodiment has a structure that does not include 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, the angle change of the micromirror devices 300a and 300b. It is possible to put image light into the light guide plates 100a and 100b. The head-mounted display device 10 is 10 g or less including the control part of the micromirror devices 300a and 300b, and is a small and lightweight head-mounted display device. As described above, in the head-mounted display device 10 according to the first embodiment, it is possible to reduce the weight burden on the nose and the ear, and it can be worn 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, the left and right peripheral visual fields of the wearer can be secured. In the head-mounted display device 10 according to the first embodiment, the micromirror devices 300a and 300b are arranged on the opposite side to the side that guides the laser light of the light guide plates 100a and 100b to the pupils 800a and 800b, respectively. Therefore, the shape can be made compact.

  Here, the power supply to the micromirror devices 300a and 300b and the image signal transmission portion may be inside or outside the head-mounted display device 10, but considering the reduction in size and weight of the device, It is desirable to be outside the head-mounted display device 10 and connected by wire. For example, a power line and a signal line for transmitting an image signal may be provided in parallel with the optical fibers 200 a and 200 b, and a power source and an image control unit may be provided along with the laser light source 20.

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

  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 retina of the operator is generally known. The retinal projection type display device is characterized by focusing regardless of the eyesight of the device and the state of vision correction. On the other hand, the retinal projection display device is downsized by using a large reflecting mirror to focus the laser light on the retina. difficult. Large screen display is also difficult. Since the head-mounted display device 10 according to the first embodiment is not a retinal projection type but has a structure including light guide plates 100a and 100b, a large screen is obtained by using the light guide plates 100a and 100b while being thin and lightweight. Enable display. There are various types of light guide plates 100a and 100b, such as a type using a half mirror, a type using a polygram 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 it is necessary to sufficiently manage the light intensity in order to put laser light into the eye. It is desirable to have a stopper structure that does not give a light intensity above a certain level. The head-mounted display device 10 according to the first embodiment is capable of displaying symbols such as characters and arrows even in a single color, and thus has sufficient value as an information assist function, but three types of lasers of red, green, and blue By using the and switching at high speed, full color can be displayed. If full-color display is possible, many expressions such as images and videos can be made, and the value of use can be greatly increased. Although there are three types of lasers, if there is a mechanism for switching at high speed on the light source side, only one optical fiber 200 is required.

  The optical fibers 200a and 200b may be made of glass or plastic. Glass is highly durable and plastic is lightweight, so it can be selected according to the application. Since the light emitted from the optical fibers 200a and 200b needs to be reliably irradiated to the micromirror devices 300a and 300b, it is desirable to fix the light to the temples 500a and 500b so that the position and angle are not shifted.

  As described above, the head-mounted display device 10 according to the first embodiment enables a large-screen display in front of the eyes, reduces the load load on the nose at the time of wearing, and reduces the left and right of the wearer. The peripheral vision can be secured, and the shape can be made compact.

  In the first embodiment, a mechanism for switching between a non-transmissive state and a transmissive or semi-transmissive state is provided on the surface of the head-mounted display device 10 on the side opposite to the eyes of the light guide plates 100a and 100b. Also good. As a switching mechanism, a light shielding plate such as sunglasses may be attached to the front surface of the light guide plates 100a and 100b via a movable member such as a hinge. When a non-transmissive device is desired to display VR, a light shielding plate is placed on the front surface of the light guide plates 100a and 100b. Further, when it is desired to use a transmissive device that performs AR display, the light shielding plate may be moved in the vertical and horizontal directions so as not to be positioned in front of the light guide plates 100a and 100b.

  In the first embodiment, as the mechanism for switching between the transmissive state and the transmissive or semi-transmissive state, a light control element that can be electrically switched between the transmissive state and the non-transmissive state may be used. Examples of the light control element include a liquid crystal element and an electrochromic element. 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 an immersive feeling and a transmissive device with high visibility in the real world.

  In the first embodiment, the head-mounted display device 10 includes a camera used for capturing an external image, detecting a position, confirming an object, a posture of the user, an operation direction, an orientation, and the like. A sensor for detection may be included. When two cameras are installed at the positions of both ends of the head-mounted display device 10, the result of positional deviation is obtained between the two captured images. By obtaining the parallax from the obtained image, the distance between the head-mounted display device 10 and the object can be obtained.

  In the first embodiment, the head-mounted display device 10 may be provided with a nine-axis sensor (acceleration, angular velocity, geomagnetism). By attaching the 9-axis sensor, the head direction and inclination of the person (wearer) wearing the head-mounted display device 10 can be grasped in real time, and objects are displayed according to the head direction and inclination. It can be deleted or deleted.

  Further, in the first embodiment, a depth sensor may be provided to the head-mounted display device 10. By providing the depth sensor, it is possible to grasp where the person (wearer) wearing the head-mounted display device 10 is in real space, so that the objects displayed on the head-mounted display device 10 can be freely arranged. Or can be fixed. In addition, even if the person wearing the head-mounted display device 10 moves, the real space can be grasped, so that the fixed object can be displayed without moving to a different position.

  In the first embodiment, an eye tracker may be added to the head-mounted display device 10. By adding the eye tracker, it is possible to know where the line of sight of the person (wearer) wearing the head-mounted display device 10 is facing, so that the characters and objects seen can be recognized, and appropriate additional information (Pop-up) can be displayed.

  In the first embodiment, a bone conduction speaker may be provided to the head-mounted display device 10. By providing a bone conduction speaker, an operator (wearer) wearing the head-mounted display device 10 can listen to voices such as guidance and instructions from a remote place without closing his ears, so work efficiently You can work safely, and you can hear the surrounding sound 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 eyeglass-type head-mounted display, but is not limited thereto, and is a one-eye head mount. It may be a display. The head-mounted display device 10 may be directly worn like glasses, but may be attached to, for example, a helmet or a hat, or may be used in goggles.

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

  2-4 is a figure which shows an example of operation | movement of the micromirror devices 300a and 300b of the head mounted display apparatus 10 which concerns on 2nd Embodiment. Here, in FIG. 2 to FIG. 4, 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 is omitted.

  In the head-mounted display device 10 according to the second embodiment, the micromirror devices 300a and 300b each have one micromirror 310a and 310b that operate two-dimensionally. Since each of the micromirror devices 300a and 300b uses only one micromirror 310a and 310b, the size of the device is reduced and the control is simplified. For this reason, the control board which mounts micromirror 310a, 310b and mirror control part 320a, 320b, respectively can also be made small.

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

  In addition, although the number of pixels depends on the laser diameter and the blinking speed, it is sufficiently possible to draw full HD (1920 × 1080 pixels) at a frequency of 60 Hz. It is also superior to existing microdisplays 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 differences from the head-mounted display device 10 according to the second embodiment.

  FIG. 5 is a diagram illustrating 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 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 micro display, a lens, and light guide plates 100a and 100b are integrated, and is fixed by a housing so that the optical axis does not shift. Therefore, it cannot be stored in a small size by folding the lens and the temples 500a and 500b (vines) like ordinary correction glasses. Even if a folding mechanism is provided in the temples 500a and 500b behind the micro display, a width of about 50 mm is required, and the storage case becomes large. As a place where the head-mounted display device 10 is used, it is assumed that the head-mounted display device 10 is out of the office, outdoors, a work site, and the like, rather than office desk work, and the convenience of carrying 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 in parallel with the temples 500a and 500b. Therefore, if the optical fibers 200a and 200b and the power / signal cable are fixed to the temples 500a and 500b, the light guide plates 100a and 100b and the temples 500a and 500b are separated. be able to. For example, if a mechanism for folding by attaching hinge portions 600a and 600b, such as general correction glasses, the light guide plates 100a and 100b can be folded to the thickness of the temples 500a and 500b, and the width can be reduced to about 30 mm. Can do. Further, if a mechanism capable of removing the temples 500a and 500b is provided, it can be stored more compactly.

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

  FIG. 6 is a diagram illustrating 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-described mechanisms are respectively provided in 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 when the device is not used, there is a risk that the laser beam may enter the eye by mistake. Therefore, a mechanism for preventing laser light from being emitted when the temples 500a and 500b, which are in a state where the head-mounted display device 10 is not used, is folded or when the temples 500a and 500b are removed. Useful.

  Any mechanism may be used. For example, a sensor is provided in a 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 closer than a certain distance. Only when the control signal for turning on the laser light source 20 is transmitted to the laser light source 20 or the laser light is not allowed to enter the light guide plates 100a and 100b. Alternatively, push-type switches 700a and 700b are provided at contact portions between the light guide plates 100a and 100b and the temples 500a and 500b, respectively. The temples 500a and 500b are in contact with the light guide plates 100a and 100b, and the push-type switches 700a and 700b are turned on. Only when the control signal for turning on the laser light source 20 is transmitted to the laser light source 20 or the laser light is not allowed to enter the light guide plates 100a and 100b.

  As described above, the display system 1 includes the laser light source 20 and the head-mounted display device 10, and the head-mounted display device 10 includes the light guide plates 100a and 100b, the optical fiber 200, the micromirror device 300a, 300b, a bridge 400, and temples 500a and 500b. Hereinafter, an embodiment of the display system 1 including the head-mounted display device 10 will 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 5mm, length 45mm, height 25mm, half mirror at an angle of 45 degrees at the emission part-Laser light source 20: Sumitomo Electric RGB CAN unit (SLM-RGB-T20-F)
-Optical fiber 200: Mitsubishi Cable Industries ST100E
・ Micromirror devices 300a and 300b: Hamamatsu Photonics S12237-03P

<Content of Implementation>
The micromirror devices 300a and 300b are swung ± 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 1080 dots lighted while scanning the Y axis once. The laser intensity was adjusted in 256 steps from a maximum of 30 microwatts to 0 and displayed in gradation.

<Results>
The size of the micromirror devices 300a and 300b is about 14 mm × 8 mm × 4 mm including the control board, and when installed in the corners of the light guide plates 100a and 100b, the field of view was not blocked. The weight was about 5 g, and it was lightweight. When an image was displayed according to a desired image signal, the wearer was able to see a large screen corresponding to a viewing angle of 60 degrees over the light guide plate.

(Example 2)
In the second embodiment, the head-mounted display device 10 includes hinge portions 600a and 600b provided in contact portions between the light guide plates 100a and 100b and the temples 500a and 500b, respectively, with respect to the configuration of the first embodiment. Yes. In Example 2, the hinge portions 600a and 600b are arranged as shown in FIG.
-Hinge parts 600a, 600b: Sugatsune Industries HG-TS type

<Results>
The temples 500a and 500b were folded at the hinge portions 600a and 600b, so that the size was compact (28 mm width).

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

<Content of Implementation>
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 when the push type switches 700a and 700b are not ON.

<Results>
When the temples 500a and 500b are folded at the hinge portions 600a and 600b, the push-type switches 700a and 700b are not turned on, and the laser light source 20 is not erroneously fired.

DESCRIPTION OF SYMBOLS 1 Display system 10 Head-mounted display apparatus 20 Laser light source 100a, 100b Light guide plate 110a, 110b Light guide part 120a, 120b Reflection part 150a, 150b One end part 200, 200a, 200b Optical fiber 300a, 300b Micromirror device 310a, 310b Micro Mirror 320a, 320b Mirror control unit 400 Bridge 500a, 500b Temple 600a, 600b Hinge unit 700a, 700b Push type switch 800a, 800b Pupil

International Publication No. 2015/137165 JP 2011-227379 A JP2015-219405A JP 2007-094175 A JP 2013-200553 A JP 2013-210633 A

Claims (5)

An optical fiber that propagates the laser light emitted from the laser light source;
A micromirror device for changing the angle of the laser beam propagated from the optical fiber;
A light guide plate for guiding the laser light whose angle has been changed by the micromirror device to a pupil of a wearer;
Have
The head mounted display device, wherein the micromirror device is disposed on a side of the light guide plate opposite to a side that guides the laser light to the pupil.   The head-mounted display device according to claim 1, wherein the micromirror device has one micromirror that operates two-dimensionally. A temple that supports the head-mounted display device by being put on the ear of the wearer;
A mechanism for folding or removing the temple;
The head-mounted display device according to claim 1, further comprising: A mechanism in which the laser beam is not emitted in a state where the temple is folded or removed,
The head-mounted display device according to claim 3, further comprising: The head-mounted display device according to any one of claims 1 to 4, which is worn by a wearer,
A device that is not worn by the wearer, a laser light source that emits laser light to the head-mounted display device; and
Display system.

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