JP5543880B2 - Head-mounted display device - Google Patents

Description

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

  Conventionally, as a head-mounted display device mounted on a human head, a display element and an eyepiece optical system are provided, and an image displayed on the display element can be enlarged and observed as a virtual image by the eyepiece optical system. Various things have been proposed. Since such a head-mounted display device is worn by an individual, it is desired to perform a display suitable for the diopter of the wearer.

  In order to meet the demand, for example, a diopter adjustment knob is provided, and the diopter adjustment knob is rotated so that the display element can be moved in the optical axis direction with respect to the eyepiece lens. What enabled adjustment is known (for example, refer patent document 1). In addition, it is known that the mounting position of a display unit having a display element and an eyepiece optical system can be adjusted back and forth with respect to the wearer's head so that the position of a virtual image can be adjusted (for example, Patent Document 2).

JP 2004-29768 A JP-A-10-74051

  However, the head-mounted display device disclosed in Patent Document 1 is configured to move the position of the virtual image in a direction toward or away from the wearer by rotating the diopter adjustment knob. Therefore, it is difficult for the wearer to intuitively understand the rotation direction of the diopter adjustment knob and the moving direction of the virtual image. As a result, an erroneous operation of moving the virtual image in the reverse direction is likely to occur, and adjustment may take time. Moreover, since the diopter adjustment knob is relatively small, there is a concern that it is difficult to perform the rotation operation.

  On the other hand, the head-mounted display device disclosed in Patent Document 2 is configured so that the mounting position of the display unit with respect to the wearer's head can be adjusted back and forth, so the adjustment direction of the display unit and the movement of the virtual image There is an advantage that the direction matches and it is easy to adjust. However, since the head-mounted display device moves the entire display unit, the relative position of the display element and the eyepiece optical system in the display unit does not change, and the diopter of the display unit with respect to the amount of movement of the display unit is not changed. The adjustment effect is very small. For this reason, if an attempt is made to secure a normal diopter adjustment range, there is a concern that the movement adjustment range of the display unit becomes large and the entire apparatus becomes large and heavy.

  Accordingly, an object of the present invention made in view of such a viewpoint is to provide a head-mounted display device capable of easily adjusting diopter by a simple operation without causing an increase in size and weight of the device. .

The invention of the head-mounted display device according to the first aspect for achieving the above object is as follows:
A display element;
A housing for housing the display element;
Image light from the display element is incident, the image light is guided in front of the wearer's eyes, and emitted toward the eyeball, thereby having a positive refracting power that enables a virtual image by the image light to be observed. An eyepiece optical system;
A slide operation unit provided to be slidable in the front-rear direction of the head of the wearer with respect to the housing;
The housing has a first housing and a second housing,
The display element is fixed to the first housing;
At least some of the optical elements of the eyepiece optical system are fixed to the second housing,
The slide operation portion, when slid in the forward direction of the wearer, the so that the optical path length between the display element and the front Symbol light optical element becomes longer, coupled to at least the display element or the optical element ing,
It is characterized by this.

  According to this configuration, the optical path length between the display element and at least some of the optical elements of the eyepiece optical system is adjusted by the slide operation of the slide operation unit, and the position of the virtual image moves in the same direction as the direction of the slide operation. To do. In other words, when the slide operation unit is slid forward of the wearer's head, the observed virtual image is also moved forward, and conversely, when the slide operation unit is slid backward, the virtual image is also moved backward. Will do. Therefore, the wearer can easily adjust the diopter by an intuitive operation. In addition, since at least the display element or at least some of the optical elements of the eyepiece optical system are moved by sliding the slide operation unit, a large diopter adjustment effect can be obtained with a small change in optical path length, and diopter adjustment is efficient. Can be performed automatically. Thereby, the diopter adjustment can be easily performed by a simple operation without increasing the size and weight of the apparatus.

The invention according to a second aspect is the head-mounted display device according to the first aspect,
The slide operation unit is slidably provided on the first casing, is coupled to the second casing, and is coupled to the optical element via the second casing.
It is characterized by this.

According to such a configuration, the slide operation unit slides the second housing relative to the first housing, so that the position of the virtual image can be adjusted with a simple mechanism and an easy operation. In addition, since at least a part of the optical elements of the eyepiece optical system may be moved in the same direction with respect to the display element by the slide operation of the slide operation unit, an intuitive operation can be performed with a simpler mechanism. In addition, since the display element does not move, the slide operation of the slide operation unit. There is no adverse effect on the electrical system including the display element.

The invention according to a third aspect is the head-mounted display device according to the first or second aspect,
In the optical element, an incident surface on which the image light from the display element is incident and an exit surface on which the image light is emitted toward the eyeball of the wearer are positioned on the near side as viewed from the wearer. Including a light guide member,
It is characterized by this.

  According to such a configuration, when the slide operation unit is slid forward, the distance from the display element is increased, that is, the optical path length is increased, and the position of the virtual image is moved far away. Operation becomes possible.

The invention according to a fourth aspect is the head-mounted display device according to the second aspect,
The slide operation unit is provided so as to be slidable on the outer surface of the first housing.
It is characterized by this.

  According to such a configuration, since the slide operation unit is disposed on the outer surface of the first housing, it is possible to easily perform a slide operation when the apparatus is mounted.

The invention according to a fifth aspect is the head-mounted display device according to the second aspect ,
The slide operation unit is provided so as to be slidable with respect to the first housing so that a virtual image can be observed in a line-of-sight direction inclined downward in the field of view of the wearer.
It is characterized by this.

  With this configuration, it is possible to adjust the diopter while observing a virtual image without disturbing the front view.

  According to the present invention, diopter adjustment can be easily performed with a simple operation without increasing the size and weight of the apparatus.

It is a figure which shows the structure of the principal part of the head mounted display apparatus which concerns on 1st Embodiment of this invention. It is the top view and side view which show the structure of the principal part of the head mounted display apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows schematic structure of the principal part inside the 1st housing | casing shown in FIG. 2, and a 2nd housing | casing. It is a figure which shows the 1st housing | casing and 2nd housing | casing which were shown in FIG. 2 separately. It is the top view and side view for demonstrating the slide operation of the head mounted display apparatus shown in FIG. It is a side view which shows the structure of the principal part of the head mounted display apparatus which concerns on 3rd Embodiment of this invention. It is a figure which isolate | separates and shows the 1st housing | casing and 2nd housing | casing which were shown in FIG. It is a cross-sectional view which shows the structure of the principal part of the head mounted display apparatus which concerns on 4th Embodiment of this invention. It is a figure which isolate | separates and shows the 1st housing | casing and 2nd housing | casing which were shown in FIG. It is a perspective view which shows the state which mounted | wore the spectacles with the head mounted display apparatus shown in FIG. It is a figure which expands and shows the structure of the principal part of the head mounted display apparatus which concerns on 5th Embodiment of this invention. It is a figure for demonstrating the distance change of the virtual image by the head mounted display apparatus which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, for convenience of explanation, a head-mounted display device for the right eye will be described. However, the head-mounted display device according to the present invention is not limited to the right eye but for the left eye. Of course, it can be configured similarly.

(First embodiment)
FIGS. 1A and 1B are diagrams showing the configuration of the main part of the head-mounted display device according to the first embodiment of the present invention. The head-mounted display device 10 includes a housing 11 and a fixing portion 12 for attaching the housing 11 to a head support portion of a headset (not shown) or a temple of glasses on the side surface of the wearer's head. Prepare. The housing 11 is attached to the right side of the head of the wearer, and the first portion 11a extending in the front-rear direction of the head and the right side of the wearer from the tip of the first portion 11a. It forms an L-shape and a second portion 11b extending in the lateral direction to the eyeball E _R previous.

A display panel 13 such as a liquid crystal panel or an organic EL panel, which is a display element, is fixed to the first portion 11a of the housing 11, and an electrical system including a drive circuit for the display panel 13 is arranged (not shown). Has been. The second portion 11b of the housing 11 and enters the image light from the display panel 13, and guides the image light to the front right eye E _R of the wearer, toward the right eye E _R An eyepiece optical system 14 having a positive refracting power that can be emitted to observe a virtual image is disposed. In the second portion 11b, an eyepiece window 11c is formed at a position where image light is emitted from the eyepiece optical system 14.

Eyepiece optical system 14 condenses the right eye E light guide member 15 for guiding the front _R of the wearer to the incident image light, the image light emitted from the light guiding portion goods 15 from the display panel 13 right and a eyepiece 16 having a positive refractive power emitted toward the eye E _R. The light guide member 15 includes a first optical surface 17 having a relatively large area, a second optical surface 18 having a small area facing the first optical surface 17, and the first optical surface 17 and the second optical surface. It consists of a trapezoidal prism having an inclined third optical surface 19 and fourth optical surface 20 connecting the surfaces 18.

  The first optical surface 17 has an image light incident surface 17a at one end and an image light exit surface 17b at the other end. The light guide member 15 is arranged so that the first optical surface 17 is positioned on the near side when viewed from the wearer in a state where the housing 11 is worn on the wearer's head. The light guide member 15 converts the image light from the display panel 13 incident on the incident surface 17a of the first optical surface 17 into the third optical surface 19, the first optical surface 17, and the second optical surface. 18, after sequentially reflecting the first optical surface 17 and the fourth optical surface 5 five times, the light is emitted from the emission surface 17 b of the first optical surface 17.

Eyepiece 16 is arranged on the exit surface 17b of the first optical surface 17, it is emitted toward the right eye E _R condenses the image light emitted from the exit surface 17b. Thereby, the wearer can observe a virtual image by the image light. The eyepiece window 11c has such a size that the eyepiece 16 protrudes.

  In the head-mounted display device 10 according to the present embodiment, the extending direction of the first portion 11a, that is, the housing 11 is mounted on the head of the wearer in the first portion 11a of the housing 11. In this state, the slide member 21 is slidable in the front-rear direction of the head. The slide member 21 has a cross section orthogonal to the slide direction in order to avoid an electrical system including the display panel 13 disposed in the first portion 11a and to prevent image light from the display panel 13 from being emitted. For example, it is formed in a U-shape, and the light guide member 15 is connected to the tip portion thereof.

  Further, the slide member 21 is slid through the guide hole 11d formed in the outer surface of the first portion 11a of the housing 11, as shown in the partial detailed side view in FIG. The portion 22 is provided so as to be exposed to the outside. The guide hole 11d is formed to extend in the sliding direction of the slide member 21. The slide member 21 can hold an arbitrary slide position by the operation of the slide operation unit 22 by friction with the housing 11 or a known slide support mechanism (not shown).

  According to the head-mounted display device 10 according to the present embodiment, for example, when the wearer moves the slide operation unit 22 in the forward direction from the state illustrated in FIG. However, within the second portion 11b of the housing 11, it moves in the same direction as shown in FIG. Thereby, the optical path length between the display panel 13 and the eyepiece optical system 14, more specifically, the optical path length between the display panel 13 and the eyepiece lens 16 is increased, and the formation position of the virtual image by the image light is far away. Moving. Therefore, since the moving direction of the slide operation unit 22 and the moving direction of the virtual image coincide with each other, the wearer can perform diopter adjustment and image distance adjustment by an intuitive slide operation. Further, by changing the optical path length between the display panel 13 and the eyepiece optical system 14, a large diopter adjustment effect can be obtained with a small change in optical path length. Thereby, diopter adjustment can be performed efficiently without increasing the size and weight of the apparatus. In addition, since the display panel 13 is fixed and the eyepiece optical system 14 slides, the electrical system does not move due to the sliding operation, which is unlikely to cause a failure. Furthermore, since the slide operation unit 22 is slidably provided on the outer surface of the first portion 11a of the housing 11, the wearer can easily operate even when the wearer is still worn.

(Second Embodiment)
FIGS. 2A and 2B are a plan view and a side view showing the configuration of the main part of the head-mounted display device according to the second embodiment of the present invention. Note that the same reference numerals are assigned to components having the same functions as those shown in FIG. 1 and description thereof is omitted. The head-mounted display device 30 includes a first housing 31 and a second housing 32. The first casing 31 is provided with a fixing portion 33 for attaching to a head support portion of a headset, a temple of glasses, or the like. 2 (a) is a fixed portion 33 illustrates a case mounted on the right side of the temple T _R of the spectacle EG.

The first housing 31, the extending direction of the temple T _R, i.e. in a state in which the spectacle EG is mounted, extending in the longitudinal direction of the wearer's head. The second housing 32 extends in the left-right direction at an obtuse angle with respect to the extending direction of the first housing 31 from the distal end portion of the first housing 31 to the right eyeball of the wearer.

  As shown in FIGS. 3A and 3B, in addition to the display panel 13 and an electrical system (not shown), an optical path correcting prism 34 is fixed to the first casing 31. In addition, the eyepiece optical system 14 having the light guide member 15 and the eyepiece lens 16 is fixed to the second casing 32. The first casing 31 is formed in a box shape as a whole, and an emission window 31a is formed at a portion from which the image light is emitted. The second housing 32 has an image light incident window 32 a formed in a portion corresponding to the emission window 31 a of the first housing 31, that is, a portion corresponding to the incident surface 17 a of the light guide member 15. An eyepiece window 32 b through which image light is emitted is formed at a portion corresponding to the eyepiece lens 16.

  The second housing 32 is provided with a slide operation unit 35 slidable on the outer surface of the first housing 31 in the extending direction of the first housing 31. Therefore, as shown in FIG. 4 with the first housing 31 and the second housing 32 separated, the slide surface of the slide operation unit 35 is provided with guide pins 36 and 37 at two locations in the sliding direction. ing. Further, guide holes 31b and 31c with which the guide pins 36 and 37 are engaged are formed on the outer surface of the first casing 31 so as to extend in the sliding direction. In addition, flange portions 36a and 37a for preventing removal from the corresponding guide holes 31b and 31c are formed at the tops of the guide pins 36 and 37, respectively. Moreover, the opening parts 31d and 31e in which the flange parts 36a and 37a of the corresponding guide pins 36 and 37 can be inserted / removed are formed in the edge part of the guide holes 31b and 31c.

  Thereby, the second housing 32 can be inserted into and removed from the first housing 31 via the slide operation unit 35. Then, the second housing 32 is attached to the first housing 31, and the sliding operation of the slide operation unit 35 causes the first housing 31 to extend, that is, before and after the wearer's head. It can move in the direction. In order to prevent intrusion of external light from the incident window 32a of the second housing 32 over the slide operation range of the slide operation unit 35, as shown in FIG. On the surface, flanges 31f and 31g are formed so as to protrude forward so as to sandwich the second housing 32 from above and below. In addition, a collar 32c is formed on the second casing 32 so as to sandwich the tip of the first casing 31 from the left-right direction in cooperation with the slide operation unit 35.

  According to the head-mounted display device 30 according to the present embodiment, for example, the wearer slides the slide operation unit 35 provided on the outer surface of the first housing 11 forward from the state shown in FIG. When operated, the second housing 32 moves in the same direction as the slide operation unit 35 as shown in FIGS. Thereby, the distance between the display panel 13 accommodated in the first housing 31 and the eyepiece optical system 14 accommodated in the second housing 32 is changed from the state shown in FIG. By changing to the state shown in (b), the optical path length between the display panel 13 and the eyepiece lens 16 becomes longer, and the formation position of the virtual image by the image light moves far away. Therefore, the same effect as in the first embodiment can be obtained. In addition, since intrusion of external light due to the movement of the second housing 32 can be prevented, a virtual image can be observed with stable image quality regardless of the image distance.

(Third embodiment)
6 and 7 are views for explaining a head-mounted display device according to a third embodiment of the present invention, and FIGS. 6A and 6B are side views showing the configuration of the main part. FIG. 7 is a view showing the housing separately. The head-mounted display device 40 according to the present embodiment is the same as the head-mounted display device 30 according to the second embodiment, that is, the line-of-sight direction inclined downward in the field of view (field of view) of the wearer, that is, somewhat. A slide operation unit 35 that supports the second casing 32 is provided so as to be slidable with respect to the first casing 31 so that a virtual image can be observed in the downward line-of-sight direction.

  For this reason, the first casing 31 is formed such that the tip thereof is inclined in the sliding direction of the slide operation unit 35 and emits image light from the display panel 13 (see FIG. 3) in the inclined direction. Has been. Further, the slide operation unit 35 is formed such that a tip end portion supporting the second housing 32 is inclined in the slide direction. Similarly, the second casing 32 receives image light emitted from the first casing 31 so as to be inclined downward, guides the image light to the eyes of the wearer, and directs the image light toward the eyeball. Inclined so as to be ejected obliquely upward and supported by the slide operation unit 35. FIG. 6B shows a state where the slide operation unit 35 is slid obliquely downward from the state shown in FIG.

  According to the head-mounted display device 40 according to the present embodiment, the same effect as in the third embodiment can be obtained. In addition, since the slide operation unit 35 that supports the second housing 32 is slidable so that a virtual image can be observed in the direction of the line of sight slightly below the wearer's field of view (field of view), It is possible to adjust the distance of the virtual image while maintaining a slightly downward display position without blocking the front view.

(Fourth embodiment)
FIGS. 8 to 10 are views for explaining a head-mounted display device according to a fourth embodiment of the present invention. FIGS. 8A and 8B are cross-sectional views showing the configuration of the main part. FIG. 9 is a view showing the housing separately, and FIG. 10 is a perspective view showing a state where the housing is attached to the glasses. The head-mounted display device 50 according to the present embodiment differs from the head-mounted display device 30 according to the second embodiment mainly in the configuration of the eyepiece optical system. Therefore, the same reference numerals are given to components having the same actions as the components described in the second embodiment, and the description thereof is omitted.

In the present embodiment, the eyepiece optical system 51 has a first lens 52 having a positive refractive power, a second lens 53 having a negative refractive power, a light guide member 54 made of a prism, and a positive refractive power. Eyepiece 16. Then, the image light from the display panel 13 accommodated in the first casing 31 passes through the first lens 52, the second lens 53, the light guide member 54, and the eyepiece lens 16, and has a positive refractive power as a whole. the has is emitted toward the right eye E _R of the wearer.

  Here, the first lens 52 is held by the exit window 31 a of the first housing 31. The second lens 53, the light guide member 54, and the eyepiece lens 16 are joined to the incident surface of the light guide member 54 so that the second lens 53 is positioned at the incident window 32 a of the second housing 32. The eyepiece 16 is joined to the exit surface of the light guide member 54 so as to be positioned at the eyepiece window 32 b of the second housing 32, and is held by the second housing 32. The light guide member 54 is configured to reflect the image light incident through the second lens 53 twice and to emit the light through the eyepiece lens 16.

  Then, as shown in FIGS. 8A and 8B, the slide operation unit 35 connected to the second housing 32 is slid with respect to the first housing 31, whereby the first operation is performed. The display panel 13 held by the housing 31 and some optical elements of the eyepiece optical system 51 held by the second housing 32 (in this case, the second lens 53, the light guide member 54, and the eyepiece 16). ) Can be adjusted so as to increase as the second casing 32 moves forward. Thereby, the same effect as in the second embodiment can be obtained. FIG. 8B shows a state in which the slide operation unit 35 is slid forward from the state shown in FIG.

In this embodiment, the fixing portion 33 of the first housing 31 has a ball joint 33a, illustrates a case which is fixed to the right side of the temple T _R of the spectacle EG via the ball joint 33a ing. In FIGS. 8A and 8B, the first casing 31 has, as an electrical system, a circuit board 56 on which a drive circuit for the display panel 13 is mounted, a button battery 57, as well as the display panel 13. The case where the flexible wiring board 58 etc. which connect the display panel 13 and the circuit board 56 is accommodated is illustrated. Further, the case where the slide operation unit 35 connected to the second housing 32 is engaged with the guide groove 31 h formed on the outer surface of the first housing 31 and slides is illustrated.

(Fifth embodiment)
FIG. 11 is a diagram showing a configuration of a main part of a head-mounted display device according to the fifth embodiment of the present invention. The head-mounted display device 60 according to the present embodiment differs from the head-mounted display device 10 according to the first embodiment mainly in the configuration of the eyepiece optical system. Therefore, the same reference numerals are given to components having the same functions as the components described in the first embodiment, and description thereof is omitted.

In the present embodiment, the eyepiece optical system 61 includes an inner focus lens 62 having a positive refractive power, the light guide member 15, and the eyepiece lens 16. Then, image light from the display panel 13, an inner focus lens 62, via the light guide member 15 and the eyepiece 16, is emitted toward the right eye E _R of the wearer.

  Here, the display panel 13 is fixed to the first portion 11 a of the housing 11, and the light guide member 15 and the eyepiece lens 16 are fixed to the second portion 11 b of the housing 11. The inner focus lens 62 is held by the lens barrel 65.

  The lens barrel 65 is provided so as to be slidable in the extending direction of the first portion 11a within the first portion 11a. As shown in a partially enlarged side view in FIG. 11, the lens barrel 65 is connected through a guide hole 11d formed on the outer surface of the first portion 11a, and the slide operation portion 22 is exposed to the outside. ing. The lens barrel 65 can hold an arbitrary slide position by operating the slide operation unit 22 by friction with the housing 11 or a known slide support mechanism (not shown).

  Therefore, according to the head-mounted display device 60 according to the present embodiment, for example, when the wearer moves the slide operation unit 22 in the forward direction, the inner focus lens 62 moves in the same direction. Thereby, the optical path length between the display panel 13 and the inner focus lens 62 becomes long, and the formation position of the virtual image by the image light moves far away. Therefore, the same effect as in the above embodiment can be obtained.

FIG. 12 is a diagram for explaining a change in the distance of the virtual image by the head-mounted display device according to the present invention. Incidentally, FIG. 12 is a head-mounted display device 40 described in the third embodiment exemplifies a case in which mounted on the right side of the temple T _R of the spectacle EG. As described in each of the embodiments described above, according to the head-mounted display device according to the present invention, when the slide operation unit 35 is slid forward, the virtual image VI moves far and the slide operation unit 35 is moved backward. When it is slid, it moves in the direction in which the virtual image VI approaches. Here, the distance from the wearer H to the virtual image VI can be, for example, from about infinity to about 30 cm. However, considering the usage that is always worn and used in various environments, the city information is displayed while walking outdoors. When doing so, it is preferable to display the virtual image VI at a distance of about 2 m to 3 m. Further, when used for desk work or the like, it is preferable to display the virtual image VI at a short distance of about 50 cm to 1 m. Thereby, there is little change of diopter with the surrounding environment, and smooth visual recognition becomes possible.

  In addition, this invention is not limited only to the said embodiment, Many deformation | transformation or a change is possible. For example, in the first to third embodiments and the fifth embodiment, the light guide member 15 is not limited to the five-time reflection, but can be any number of times of reflection such as two-time reflection or three-time reflection. Similarly, the light guide member 54 of the fourth embodiment is not limited to the two-time reflection, but can be an arbitrary plural-time reflection such as a three-time reflection or a five-time reflection.

  In the second embodiment, the slide operation unit 35 is configured to be slidable by forming a guide groove in the first casing 31 and engaging the guide groove, as in the fourth embodiment. It is also possible to do. Further, in each of the above embodiments, the slide operation unit can be slidably provided not only on the outer surface side of the housing but also on the upper surface side and the lower surface side.

  In each of the above embodiments, the display panel is fixed, and at least a part of the optical elements of the eyepiece optical system is moved by the slide operation of the slide operation unit. However, only the display panel or the display panel and the eyepiece optical system are moved. It can also be configured to move both at least some of the optical elements. When the display panel is moved, if the slide operation unit is moved forward, the display panel is moved backward so that the optical path length with the eyepiece optical system is increased. In addition to the above-described display panel that emits two-dimensional image light, the present invention uses a display element that emits pixel-level image light and can observe an image by two-dimensional scanning with the image light. It is also possible to effectively apply to the case of displaying on the screen.

10, 30, 40, 50, 60 Head mounted display device 11 Housing 11a First part 11b Second part 11c Eyepiece window 11d Guide hole 12 Fixing part 13 Display panel 14 Eyepiece optical system 15 Light guide member 16 Eyepiece Lens 17a Incident surface 17b Ejection surface 21 Slide member 22 Slide operation unit 31 First housing 31a Ejection window 31b, 31c Guide hole 31f, 31g ３２ 32 Second housing 32a Incident window 32b Eyepiece window 32c ３３ 33 Fixing portion 33a ball joint 34 prism 35 slide operation portion 36, 37 the guide pins 51 the eyepiece optical system 52 first lens 53 second lens 54 the light guide member 61 eyepiece optical system 62 inner focus lens 65 barrel E _R right eye EG glasses T _R Temple VI Virtual Image H Wearer

Claims (5)

A display element;
A housing for housing the display element;
Image light from the display element is incident, the image light is guided in front of the wearer's eyes, and emitted toward the eyeball, thereby having a positive refracting power that enables a virtual image by the image light to be observed. An eyepiece optical system;
A slide operation unit provided to be slidable in the front-rear direction of the head of the wearer with respect to the housing;
The housing has a first housing and a second housing,
The display element is fixed to the first housing;
At least some of the optical elements of the eyepiece optical system are fixed to the second housing,
The slide operation portion, when slid in the forward direction of the wearer, the so that the optical path length between the display element and the front Symbol light optical element becomes longer, coupled to at least the display element or the optical element ing,
A head-mounted display device characterized by that. The slide operation unit is slidably provided on the first casing, is coupled to the second casing, and is coupled to the optical element via the second casing.
The head-mounted display device according to claim 1. In the optical element, an incident surface on which the image light from the display element is incident and an exit surface on which the image light is emitted toward the eyeball of the wearer are positioned on the near side as viewed from the wearer. Including a light guide member,
The head-mounted display device according to claim 1 or 2. The slide operation unit is provided so as to be slidable on the outer surface of the first housing.
The head-mounted display device according to claim 2 . The slide operation unit is provided so as to be slidable with respect to the first housing so that a virtual image can be observed in a line-of-sight direction inclined downward in the field of view of the wearer.
The head-mounted display device according to claim 2 .

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