JP2016063274A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device which can suppress dirt of a half mirror.SOLUTION: A head-mounted display includes: a housing; a half mirror 56 which is provided on the left side of an image unit that can emit image light leftward, has a plane on the back side, deflects the image light to the back side, and is held by the housing in the state in which an angle made by the plane and a back and forth direction is an angle θ1; and a transmission member 58 which has a transmission surface transmitting the image light and is held by the housing in the state in which an angle made by the transmission surface and the back and forth direction is an angle θ2 smaller than the angle θ1. The housing has: a first extension part 22A arranged above the half mirror 56; a second extension part 23A arranged below the half mirror 56; and a left end provided across respective rear ends of the first extension part 22A and the second extension part 23A. The first extension part 22A, the second extension part 23A, and the left end form an open part on the back side of the half mirror 56.SELECTED DRAWING: Figure 10

Description

  The present invention relates to an image display device mounted on a user's head.

  2. Description of the Related Art Conventionally, a head mounted display including a deflection member that deflects image light toward a user's eye is known. The head mounted display described in Patent Document 1 includes a main body portion and an emission port portion. The main body has an LCD and an eyepiece optical system inside. The main body portion is fixed to a glasses-type frame. The main body portion holds the exit portion at the end portion in the emission direction of the image light emitted from the eyepiece optical system. The exit port portion supports the half mirror at the end opposite to the portion held by the main body portion. The half mirror protrudes in a direction inclined toward the user with respect to the emission direction. The half mirror reflects image light toward the user's eyes.

JP 2013-44830 A

  When the user adjusts the position by holding the head-mounted display with his / her hand, the finger is likely to come in contact with the half mirror protruding from the exit port portion. For this reason, there exists a problem that a half mirror may get dirty.

  The objective of this invention is providing the image display apparatus which can suppress the stain | pollution | contamination of a half mirror.

  The image display device of the present invention includes a housing, a member covered by the housing, and an image light forming portion capable of emitting image light toward one side in the first direction, and the image light forming portion. The image is a member provided on the one side in the first direction with respect to the first direction and has a plane on one side in the second direction orthogonal to the first direction, and is emitted from the image light forming unit. A deflecting member that deflects light to the one side in the second direction and is held by the housing in a state where the acute angle formed by the normal direction of the plane and the first direction is the first angle. And a transmission surface that transmits the image light and is provided between the one end portion in the first direction of the image light forming portion and the other end portion in the first direction of the deflection member. And the second angle smaller than the first angle is an acute angle formed by the normal direction of the transmission surface and the first direction. A transparent member that is held by the casing in a state where the casing is disposed, and the casing is disposed on one side in a third direction orthogonal to the first direction and the second direction with respect to the deflection member. Each of the first extension part, the second extension part arranged on the other side in the third direction with respect to the deflection member, and the first extension part and the second extension part, The one side in the first direction is provided between the one end in the second direction, and the one end in the first direction in the first direction of the image light forming unit. And the first notch end portion is located on the other side in the first direction with respect to the deflecting member in the first direction. .

  In the image display device of the present invention, the image light emitted from the image light forming section is transmitted through the transparent member and deflected to one side in the second direction by the deflecting member. The deflected image light is guided to the user's eyes. Thus, the user can recognize the image indicated by the image light. Of the housing of the image display device, the first extending portion and the second extending portion support the deflecting member from above and below. The first notch end portion is disposed on the other side in the first direction with respect to the deflection member in order to allow the image light to pass therethrough. Here, the deflection member is held by the housing in a state where the acute angle formed by the normal line of the plane and the first direction becomes the first angle. The transparent member is held by the housing in a state where the acute angle formed by the normal line of the transmission surface and the first direction is a second angle smaller than the first angle. In this case, the distance between the deflection member and the transparent member is narrower than in the case where the normal line of the transparent surface of the transparent member is held parallel to the first direction. For this reason, it becomes difficult for a finger to enter between the deflection member and the transparent member from one side in the first direction with respect to the first notch end. For this reason, since it becomes difficult for a user's finger | toe to contact a deflection | deviation member, it is suppressed appropriately that a deflection | deviation member becomes dirty by finger contact.

  In the present invention, the second angle may be 10 degrees or more. In this case, the image display device can suppress the image light emitted from the image light forming unit from being reflected by the transmission surface of the transparent member and returning to the image light forming unit. Therefore, in the image display device, the image light emitted from the image light forming unit is reflected by the display surface included in the image light forming unit and the surface of the transparent member, and reciprocates between the image light forming unit and the transparent member. Occurrence of the phenomenon that occurs. In this case, the image display apparatus can make the user recognize a good image while preventing the deflecting member from becoming dirty.

  In the present invention, the image light forming unit may include a reflective liquid crystal display device. In this case, the problem that the image light reciprocates between the image light forming portion and the transparent member is more likely to occur. For this reason, by setting the second angle to 10 degrees or more, the occurrence of the problem that the image light reciprocates between the image light forming portion and the transparent member is effectively suppressed while preventing the deflection member from becoming dirty. it can.

  In the present invention, each of the first extending portion and the second extending portion is a portion between the one end portion in the first direction and the one end portion in the second direction. Further, it may be curved convexly toward the outside. In this case, the first extension part and the second extension part of the image display device prevent the finger from approaching the deflection member from one side in the first direction and one side in the second direction. Therefore, the image display apparatus can further appropriately prevent the user's finger from coming into contact with the deflection member.

  In the present invention, the one end in the first direction of each of the first extension portion and the second extension portion is the one in the first direction of the deflection member in the first direction. It may be arranged at the same position as the end portion on the side or on the one side in the first direction. In this case, the deflecting member does not protrude to one side in the first direction from the end portions on one side in the first direction of the first extending portion and the second extending portion. For this reason, the image display apparatus can protect a deflection | deviation member by the 1st extension part and the 2nd extension part.

  In this invention, the said housing | casing is provided ranging between the edge parts of the other side of the said 2nd direction of each of the said 1st extension part and the said 2nd extension part, and the said image light A second notch end portion disposed on the one side in the first direction rather than an end portion on the one side in the first direction of the forming portion is provided, and the second notch end portion is provided in the first direction. The first extension portion and the second extension portion are positioned on the other side of the first direction with respect to the deflection member, and the one end portion of the first direction and the first extension portion The portion between the other end in the two directions may be curved in a convex shape toward the outside. In this case, the image display apparatus can allow the light in front of the user's eyes to pass through one side in the first direction with respect to the second notch end portion and enter the deflecting member. In this case, the image display apparatus can make the user recognize the image indicated by the image light on the scenery in front of the eyes. In addition, the first extension portion and the second extension portion of the image display device prevent the finger from approaching the deflection member from one side in the first direction and the other side in the second direction. Therefore, the image display apparatus can further appropriately prevent the user's finger from coming into contact with the deflection member.

  In the present invention, the one end in the first direction of each of the first extending portion and the second extending portion is the one in the first direction of the deflecting member in the second direction. You may arrange | position in the same position as the edge part of the side. In this case, the image display device can reduce the length of the image display device in the first direction while protecting the deflection member by the first extension portion and the second extension portion. Therefore, the image display device can be miniaturized.

  In the present invention, a deflection unit having the transparent member and the deflection member may be provided, and the deflection unit may be detachably supported between the first extension portion and the second extension portion. In this case, the image display apparatus can exchange the transparent member and the deflecting member.

It is a perspective view of HMD1. 3 is a perspective view of a main body member 11. FIG. 3 is a perspective view of a housing 12. FIG. It is the figure which looked at the front case 13 from back. FIG. 3 is an exploded perspective view inside the main body member 11. 7 is a perspective view of a holder 5. FIG. 7 is a perspective view of a holder 5. FIG. It is a figure which shows the state from which the holder 5 and the half mirror 56 were removed from the housing | casing 12. FIG. It is a figure which shows the state in which the holder 5 and the half mirror 56 were mounted | worn with the housing | casing 12. FIG. 4 is an enlarged perspective view of a holder 5 and a half mirror 56. FIG. 3 is a perspective view of a lens unit 6, an image unit 7, an operation member 3, and an adjustment mechanism 4. FIG. It is a front view of the main body member 11 in a modification. It is a perspective view of the main body member 11 in a modification.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a head mounted display (hereinafter referred to as “HMD”) 1 is an optically transmissive see-through HMD. The light in the scene in front of the user's eyes is guided directly to the user's eyes by passing through the half mirror 56. The projection format of HMD1 is a virtual image projection type. The half mirror 56 reflects the light of the image displayed on the liquid crystal panel 72 </ b> B (see FIG. 5, described later) toward one eye of the user. The HMD 1 can allow the user to recognize an image superimposed on the scene in front of him. The HMD 1 includes a main body member 11, an attachment tool 8, and a connection tool 9. Hereinafter, in order to help understand the description of the figure, the upper side, lower side, left side, right side, front side, and rear side of the HMD 1 are defined. The upper side, lower side, left side, right side, front side, and rear side of the HMD 1 correspond to, for example, the upper side, lower side, left side, right side, lower left side, and upper right side of FIG. The upper side, the lower side, the left side, the right side, the front side, and the rear side of the HMD 1 correspond to the upper side, the lower side, the right side, the left side, the front side, and the rear side, respectively, for the user wearing the wearing tool 8. .

<Mounting tool 8, connecting tool 9, body member 11>
The mounting tool 8 is made of a flexible material such as resin or metal (for example, stainless steel). The mounting tool 8 includes a first portion 8A and second portions 8B and 8C. The first portion 8A and the second portions 8B and 8C are each a curved elongated plate-like member. The first portion 8A extends in the left-right direction and is curved in a convex shape on the front side. The second portion 8B extends from an end portion on one side (for example, the left side) of the first portion 8A. The second portion 8C extends from the end portion on the other side (for example, the right side) of the first portion 8A. The second portions 8B and 8C each extend in a direction in which end portions on the opposite side (for example, rear side) to the side connected to the first portion 8A approach each other. The wearing tool 8 is worn on the user's head with the first part 8A, the second part 8B, and 8C in contact with the frontal, right and left heads of the user, respectively. Is done. In this state, the first portion 8A extends in the left-right direction along the forehead of the user.

  The connection tool 9 is rod-shaped. The connection tool 9 is made of resin or metal. One end side (for example, the upper side) of the connection tool 9 is connected to the vicinity of a portion of the first portion 8A of the mounting tool 8 that is connected to the second portion 8C. The connection tool 9 and the mounting tool 8 are connected by a ball joint. A body member 11 to be described later is connected to the other end side (for example, the lower side) of the connection tool 9. The connection tool 9 and the main body member 11 are connected by a ball joint. The connection tool 9 holds the main body member 11 at a position separated from the mounting tool 8. The connection tool 9 can arrange | position the half mirror 56 of the main body member 11 ahead of a user's left eye in the state in which the mounting tool 8 was worn by the user's head.

  As shown in FIGS. 1, 2, and 3, the main body member 11 includes a housing 12, an operation member 3, an adjustment mechanism 4 (see FIG. 5), a deflection unit 59, a lens unit 6 (see FIG. 5), and an image unit. 7 (see FIG. 5). The deflection unit 59 includes a holder 5, a half mirror 56, and a transparent member 58 (see FIG. 6).

<Case 12>
As shown in FIGS. 1, 2, and 3, the housing 12 includes a main body portion 12 </ b> A and a protruding portion 12 </ b> B. The main body 12A has a substantially rectangular parallelepiped shape with curved corners. The protrusion 12B protrudes rearward from the right rear side of the main body 12A. The housing 12 has a hollow box shape. The front side, the upper side, the lower side, the rear side, and the right side of the main body 12A are respectively referred to as a third casing 21, a first casing 22, a second casing 23 (see FIG. 1), and a fourth casing 24 ( 3) and the fifth casing 25 (see FIG. 1). The left side of the housing 12 is opened, and the left side of a lens unit 6 (described later) inside the housing 12 is exposed. The left side of the lens unit 6 is not covered by the housing 12.

  Hereinafter, as shown in FIG. 3, from each of the third housing 21, the first housing 22, the second housing 23, and the fourth housing 24, a lens unit 6 (see FIG. 5) described later. The left portions are also referred to as a third extending portion 21A, a first extending portion 22A, a second extending portion 23A, and a fourth extending portion 24A, respectively. The third extending portion 21 </ b> A corresponds to a portion extending between the left end of the lens unit 6 and the left end 21 </ b> C of the third housing 21. The first extending portion 22 </ b> A corresponds to a portion that extends between the left end of the lens unit 6 and the left end 22 </ b> C of the first housing 22. The second extending portion 23 </ b> A corresponds to a portion extending between the left end of the lens unit 6 and the left end 23 </ b> C of the second housing 23. The fourth extending portion 24 </ b> A corresponds to a portion extending between the left end of the lens unit 6 and the left end 24 </ b> C of the fourth housing 24. The rear surface of the third extending portion 21A, the lower surface of the first extending portion 22A, and the upper surface of the second extending portion 23A are respectively a third back surface 21B, a first back surface 22B, This is referred to as a second back surface 23B. The first back surface 22B and the second back surface 23B face each other.

  As shown in FIG. 2, the left end 21C of the third housing 21 is provided between the front end 22F of the first extending portion 22A and the front end 23F of the second extending portion 23A. The left end 21C is recessed rightward from the both ends in the vertical direction toward the center in the vertical direction. The left end 21C forms a substantially arc. The rightmost position of the left end 21C is disposed on the right side of the leftmost positions of the left end 22C and the left end 23C. As shown in FIG. 3, the left end 24C of the fourth housing 24 is provided between the rear end 22R of the first extension portion 22A and the rear end 23R of the second extension portion 23A. The left end 24C extends substantially linearly in the vertical direction. The leftmost position of the left end 24C is arranged on the right side of the leftmost positions of the left ends 21C, 22C, and 23C.

  As shown in FIG. 2, the curved portion 222 is located between the front end 22F and the left end 22C of the first extension portion 22A. The curved portion 222 is curved in a convex shape toward the outside of the first extension portion 22A, specifically, toward the front left side. The curved portion 232 is located between the front end 23F and the left end 23C of the second extending portion 23A (see FIG. 3). The curved portion 232 is curved in a convex shape toward the outside of the second extending portion 23A, specifically, toward the front left side. The curved portion 223 is located between the rear end 22R and the left end 22C of the first extension portion 22A. The curved portion 223 is curved in a convex shape toward the outside of the first extending portion 22A, specifically, toward the rear left side. The curved portion 233 is located between the rear end 23R and the left end 23C of the second extending portion 23A (see FIG. 3). The curved portion 233 is curved in a convex shape toward the outside of the second extending portion 23A, specifically toward the rear left side.

  As shown in FIGS. 3 and 4, a front first regulating member 221A is provided on the front side of the first back surface 22B. The front first regulating member 221A is a plate-like member extending downward from the first back surface 22B. As shown in FIG. 4, a front first regulating member 231A is provided on the front side of the second back surface 23B. The front first regulating member 231A is a plate-like member extending upward from the second back surface 23B. Both surfaces of the front first regulating members 221A and 231A face in the left-right direction. The positions in the left-right direction of the first front regulating members 221A and 231A are equal.

  As shown in FIG. 3, a rear first regulating member 221B is provided on the rear side of the first back surface 22B. The rear first regulating member 221B is a plate-like member that extends downward along the rear end 22R of the first extending portion 22A. A rear first restriction member 231B is provided on the rear side of the second back surface 23B. The rear first regulating member 231B is a plate-like member that extends upward along the rear end 23R of the second extending portion 23A. Both surfaces of the rear first regulating members 221B and 231B face in the front-rear direction. The position in the left-right direction of the front first restriction members 221A and 231A is substantially equal to the position in the left-right direction of the right end of the rear first restriction members 221B and 231B. The right end of the rear first regulating member 221B, the upper end of the left end 24C of the fourth housing 24, and the first back surface 22B form a groove 221C that is recessed upward. The right end of the rear first regulating member 231B, the lower end of the left end 24C of the fourth housing 24, and the second back surface 23B form a groove 231C that is recessed downward.

  As shown in FIGS. 3 and 4, a hole 21 </ b> D penetrating in the front-rear direction is provided at the center in the vertical direction of the third housing 21 and on the left side of the center in the horizontal direction of the housing 12. An adjusting mechanism 4 (see FIG. 5), which will be described later, fits into the hole 21D from the rear side. Around the hole 21 </ b> D of the third housing 21, a recess 21 </ b> E that is recessed in a circular shape toward the rear is provided. An operation member 3 (see FIG. 5) to be described later fits into the recess 21E from the front side. In the third back surface 21B, the second regulating member 211 is provided on the left side of the recess 21E and in the vicinity of the left end 21C. The second restricting member 211 is a plate-like member extending rearward from a position including the vertical center of the third back surface 21B. Both surfaces of the second regulating member 211 face in the left-right direction. As shown in FIG. 4, the second restricting member 211 is disposed on the right side of the left and right positions of the front first restricting members 221 </ b> A and 231 </ b> A. As shown in FIG. 3, the second restricting member 211 is arranged on the right side of the position in the left-right direction of the right end of each of the rear first restricting members 221 </ b> B and 231 </ b> B. The length in the left-right direction between the right end of each of the front first regulating members 221A, 231A and the rear first regulating members 221B, 231B and the left end of the second regulating member 211 is a holder 5 (see FIG. 6) is equal to the length (thickness) in the left-right direction of the first end 51 (see FIG. 6).

  As shown in FIG. 3, a plurality of holes 24 </ b> D and a plurality of holes 24 </ b> E penetrating in the front-rear direction are provided in the fourth housing 24 on the right side of the center in the left-right direction of the housing 12. Each of the plurality of holes 24 </ b> D is a plurality of screw holes for attaching an image unit 7 described later to the housing 12. Each of the plurality of holes 24 </ b> E is a plurality of screw holes for attaching the connector 9 to the housing 12. A hole 25D penetrating in the front-rear direction is provided at the rear end of the protruding portion 12B. A communication line 28 (see FIG. 2) is connected to the hole 25D. The HMD 1 is connected to an external device (not shown) via the communication line 28. The external device outputs image data to the HMD 1.

  A housing engaging portion 241 is provided at the fourth extending portion 24 </ b> A of the fourth housing 24, more specifically, at the left end 24 </ b> C of the fourth housing 24. The housing engaging portion 241 is a plate-like member that extends leftward from a position including the center in the vertical direction of the left end 24 </ b> C of the fourth housing 24.

  As shown in FIG. 5, the housing 12 is formed by combining a front housing 13 and a rear housing 14. The front housing 13 includes a third housing 21, a front portion of each of the first housing 22 and the second housing 23, and a fifth housing 25. The rear housing 14 includes a rear portion of each of the first housing 22 and the second housing 23, and a fourth housing 24. The lens unit 6, the image unit 7, and the adjustment mechanism 4 are disposed in the housing 12. The holder 5 is held at the left end of the housing 12. The holder 5, the lens unit 6, and the image unit 7 are arranged in order from the left side to the right side. The adjustment mechanism 4 is disposed on the front side of the lens unit 6. A groove 242 that is recessed rearward is provided on the front surface of the rear side surface (fourth housing 24) of the rear housing 14. The groove part 242 extends in the left-right direction.

<Image unit 7>
The image unit 7 generates and emits image light of an image corresponding to image data received from an external device via the communication line 28 (see FIG. 2). As shown in FIG. 5, the image unit 7 includes a first holding member 71, a liquid crystal display device 72, and a second holding member 73.

  The first holding member 71 includes a cylindrical member 71A and side plate members 71B, 71C, 71D. The cylindrical member 71A is a cylindrical member extending in the left-right direction. The side plate members 71B, 71C, 71D are flat plate-like members that extend rightward from the front end, the rear end, and the lower side of the right end portion of the cylindrical member 71A, respectively. The lower end of the side plate member 71B is connected to the front end of the side plate member 71D, and the lower end of the side plate member 71C is connected to the rear end of the side plate member 71D. The first holding member 71 is held at a fixed position with respect to the housing 12 by screws inserted into the plurality of holes 24D (see FIG. 3).

  The liquid crystal display device 72 includes a glass substrate 72A and a liquid crystal panel 72B. The glass substrate 72A and the liquid crystal panel 72B are disposed in a portion of the first holding member 71 surrounded by the side plate members 71B, 71C, 71D. The liquid crystal panel 72B is a well-known rectangular reflection type liquid crystal panel. The liquid crystal panel 72B generates image light by displaying an image on the left side surface. The glass substrate 72A is provided on the left side surface of the liquid crystal panel 72B and protects the display surface of the liquid crystal panel 72B. Light from a light source (not shown) enters the liquid crystal panel 72B. The liquid crystal panel 72B reflects the incident light to generate image light. The image light generated by the liquid crystal panel 72B passes through the glass substrate 72A to the left.

  The second holding member 73 has a substrate holding portion 73A and a control substrate 73B. The substrate holding portion 73A is disposed on the right side of the liquid crystal panel 72B of the liquid crystal display device 72. The control board 73B is disposed on the right side of the board holding portion 73A. The control board 73B is connected to the liquid crystal panel 72B via a flexible printed board (not shown). The communication line 28 (see FIG. 2) is connected to the control board 73B. The control board 73 </ b> B receives the image data transmitted from the external device via the communication line 28. The control board 73B outputs a control signal to the liquid crystal panel 72B via the flexible printed board, thereby causing the liquid crystal panel 72B to display an image corresponding to the image data.

  In the present invention, a two-dimensional display device such as a digital mirror device (DMD) or an organic EL may be used instead of the liquid crystal panel 72B. Furthermore, a retinal scanning type projection device (Retinal Scanning Display) that projects light two-dimensionally scanned onto the retina of the user may be used.

<Lens unit 6>
The lens unit 6 is disposed on the left side of the image unit 7. The lens unit 6 guides the image light emitted from the image unit 7 to the half mirror 56 disposed on the left side of the lens unit 6. The lens unit 6 includes a holding member 61, a cylindrical member 62, and a plurality of lenses 63. The holding member 61 is a substantially square cylindrical member extending in the left-right direction. A plurality of lenses 63 are fixed inside the holding member 61. Each optical axis of the plurality of lenses 63 is disposed on an axis extending in the left-right direction at the center of the holding member 61. The cylindrical member 62 is a cylindrical member extending in the left-right direction. The cylindrical member 62 is provided on the right side of the holding member 61. The radius of the cylindrical member 62 is slightly smaller than the radius of the cylindrical member 71A of the image unit 7. At least a part of the cylindrical member 62 fits inside the cylindrical member 71A. The image light generated by the image unit 7 enters the inside of the cylindrical member 62 from the right side, passes through the holding member 61 and the inside of the cylindrical member 62, and exits from the left end of the holding member 61 toward the left side. The plurality of lenses 63 refracts image light incident from the right side and emits it to the left side. On the front surface 61 </ b> A of the holding member 61, a convex portion 64 that protrudes forward is provided. The convex part 64 is cylindrical. The convex portion 64 fits into a cam groove (not shown) provided on the rear surface of the adjustment mechanism 4. A convex portion (not shown) protruding rearward is provided on the rear surface 61B of the holding member. This convex part fits into the groove part 242 (see FIG. 5) of the fourth housing 24.

<Operation member 3, adjustment mechanism 4>
As shown in FIG. 5, the operation member 3 is a truncated cone-shaped member. The central axis of the operation member 3 extends in the front-rear direction. The operation member 3 can be rotated with the central axis as a fulcrum. On the rear end surface of the operation member 3, the protruding portion 4A of the adjusting mechanism 4 is fitted. As shown in FIG. 5, the adjusting mechanism 4 is a circular plate-like member. Both surfaces of the adjusting mechanism 4 face in the front-rear direction. The adjustment mechanism 4 has a protruding portion 4A that protrudes forward from the vicinity of the center of the circle. The protruding portion 4 </ b> A enters the hole 21 </ b> D of the third housing 21 from the rear side and protrudes to the front side of the third housing 21. A portion of the protrusion 4 </ b> A that protrudes to the front side of the third housing 21 is fitted to the rear end surface of the operation member 3. As a result, the operation member 3 and the adjustment mechanism 4 are held by the third housing 21. The adjustment mechanism 4 is rotatable integrally with the operation member 3 with an axis extending in the front-rear direction passing through the circular center as a fulcrum. The adjustment mechanism 4 may be formed integrally with the operation member 3.

<Deflection unit 59>
As shown in FIG. 5, the deflection unit 59 has a half mirror 56, a holder 5, and a transparent member 58 (see FIG. 6). The half mirror 56 is disposed on the left side of the lens unit 6. The half mirror 56 can reflect image light that has passed through the lens unit 6 and is incident from the right side to the rear side. The user's eyes can visually recognize the virtual image based on the image light reflected to the rear side by the half mirror 56. Moreover, the half mirror 56 can transmit the external light incident from the front side to the rear side.

  The half mirror 56 has a rectangular plate shape. The half mirror 56 is configured, for example, by vapor-depositing a metal such as aluminum or silver on a transparent resin or glass substrate so as to have a predetermined reflectance (for example, 50%). The half mirror 56 is held by a holder 5 described later. One surface 56B of both surfaces of the half mirror 56 held by the holder 5 faces right rearward, and the other surface 56C faces left front. The half mirror 56 can reflect a part (for example, 50%) of light incident on each of the surfaces 56B and 56C and transmit the other part.

  In the present invention, instead of the half mirror 56 described above, a reflective member that does not transmit the image light incident on the surface 56B to the left side may be used. In this case, the light from the outside that has entered the surface 56C does not pass through the reflecting member. Further, instead of the half mirror 56, an optical path deflecting member such as a prism or a diffraction grating may be used.

  The holder 5 is disposed on the left side of the lens unit 6 and holds the half mirror 56. As shown in FIGS. 6 and 7, the holder 5 includes a base member 50. The base member 50 has a plate-like first end 51, second end 52, third end 53, and fourth end 54. Of the three pairs of parallel planes of the first end 51, each of the pair of planes having the largest area faces in the left-right direction. The upper and lower corners of the front end of the first end 51 are curved. The second end 52 extends rearward from above the rear end of the first end 51. The third end portion 53 extends rearward from the lower side of the rear end portion of the first end portion 51. Of the three pairs of parallel planes of the second end portion 52 and the third end portion 53, each of the pair of planes having the largest area faces in the vertical direction. The fourth end portion 54 is constructed between the rear end portions of the second end portion 52 and the third end portion 53. Of the three pairs of parallel planes of the fourth end portion 54, each of the pair of planes having the largest area faces the front-rear direction. The length in the left-right direction of the fourth end portion 54 is shorter than the length in the left-right direction of each of the second end portion 52 and the third end portion 53. The positions of the right end surfaces of the first end portion 51, the second end portion 52, the third end portion 53, and the fourth end portion 54 in the left-right direction coincide with each other and form the same plane. A hole 51 </ b> B is formed in a portion surrounded by the first end portion 51 to the fourth end portion 54. Hereinafter, as shown in FIG. 7, the right end surfaces of the first end portion 51, the second end portion 52, the third end portion 53, and the fourth end portion 54 are respectively referred to as the first end surface 51A and the first end surface 51A. These are referred to as a second end surface 52A, a third end surface 53A, and a fourth end surface 54A.

  As shown in FIG. 6, a hole 52 </ b> C penetrating in the vertical direction is provided in the vicinity of the left front corner of the second end portion 52. A hole 53 </ b> C penetrating in the vertical direction is provided in the vicinity of the left front corner of the third end portion 53. As shown in FIG. 5, the upper protruding portion 56A protruding upward from the upper end portion of the half mirror 56 is fitted into the hole 52C from below. A lower protruding portion (not shown) protruding downward from the lower end portion of the half mirror 56 is fitted into the hole 53C from above. The holder 5 holds the half mirror 56 by supporting the upper protrusion 56A of the half mirror 56 through the hole 52C and supporting the lower protrusion (not shown) of the half mirror 56 through the hole 53C. The half mirror 56 is disposed on the left side with respect to a plane including each of the first end surface 51A to the fourth end surface 54A. With the half mirror 56 held by the holder 5, the acute angle formed by the surface 56B of the half mirror 56 and each of the first end surface 51A to the fourth end surface 54A (see FIG. 7) is 45 degrees. is there.

  As shown in FIG. 7, a protrusion 511 is provided at the rear end of the first end face 51 </ b> A of the first end 51. The protrusion 511 protrudes rearward from a position including the center in the vertical direction. A protrusion 521 that protrudes downward is provided at the front end of the lower surface of the second end 52. A protruding portion 531 that protrudes upward is provided at the front end of the upper surface of the third end portion 53. The length in the left-right direction between the left end of the protrusion 511 and the right end of the protrusions 521 and 531 is substantially equal to the thickness of the transparent member 58 described later. As shown in FIG. 6, a protrusion 543 is provided at the left end of the front surface of the fourth end 54, in other words, at the end opposite to the fourth end surface 54 </ b> A. The protruding portion 543 protrudes forward from a position including the vertical center. As illustrated in FIG. 7, protrusions 544A and 544B are provided on the right side of the front end surface of the fourth end portion 54 with respect to the left end. The protrusion 544A protrudes forward from a position above the vertical center of the fourth end face 54A. The protruding portion 544B protrudes forward from a position below the vertical center of the fourth end surface 54A. The length in the left-right direction between the right end of the protrusion 554 and the left end of the protrusions 544A, 544B is substantially equal to the thickness of the transparent member 58 described later.

  As shown in FIGS. 6 and 7, the transparent member 58 is held by the holder 5 by protrusions 511, 521, 531 (see FIG. 7), 543, 544 A (see FIG. 7), and 544 B (see FIG. 7). Yes. The transparent member 58 is a rectangular transparent plate. Hereinafter, each of the pair of planes having the largest area among the three pairs of parallel planes of the transparent member 58 is referred to as a transmission surface. The transparent member 58 is made of, for example, a transparent resin such as acrylic or polycarbonate, or glass. The protruding portion 511 contacts the right side surface of the front end of the transparent member 58. The protrusions 521 and 531 are in contact with the left side surface of the front end of the transparent member 58. The front end portion of the transparent member 58 is formed by the protruding portions 511, 521, and 531. The protrusion 543 contacts the left side surface of the rear end of the transparent member 58. The protrusions 544A and 544B are in contact with the right side surface of the rear end of the transparent member 58. The rear end of the transparent member 58 is sandwiched between the protrusions 543, 544A, and 544B from the left-right direction. The transparent member 58 covers the hole 51B.

  The direction from the front end to the rear end of the transparent member 58 is the left rear direction. Of the pair of parallel planes of the transparent member 58, the normal lines of the pair of planes having the largest area are slightly tilted in the front-rear direction with respect to the left-right direction. Specifically, it is as follows. In FIG. 6, a predetermined line segment S1 extending in the left-right direction through the transmission surface of the transparent member 58 is defined. An intersection point C1 where the line segment S1 and the transmission surface of the transparent member 58 intersect is defined. A predetermined line segment H1 extending along a normal line at the intersection C1 of the transparent surface of the transparent member 58 (hereinafter simply referred to as “the normal line of the transparent member 58”) is defined. In this case, the direction extending leftward from the intersection C1 in the line segment H1 is inclined forward with respect to the line segment S1, and the direction extending rightward from the intersection C1 in the line segment H1 is backward with respect to the line segment S1. Lean on. The acute angle formed by the line segment S1 and the line segment H1 is 10 degrees. The acute angle formed by the line segment S1 and the line segment H1 corresponds to the angle formed by the transmission surface of the transparent member 58 and each of the first end surface 51A to the fourth end surface 54A.

  As shown in FIGS. 6 and 7, a holder protrusion 52 </ b> B is provided on the upper surface of a portion of the second end 52 that is connected to the fourth end 54. The holder protrusion 52B includes extending portions 521B and 522B. The extending portion 521B is a plate-like portion that protrudes leftward with respect to the second end surface 52A (see FIG. 7). The length of the extending portion 521B in the left-right direction is the left-right direction between the upper end of the left end 24C (see FIG. 3) of the fourth extending portion 24A and the right end of the rear first regulating member 221B (see FIG. 3). (Hereinafter also referred to as “the length of the groove portion 221C (see FIG. 3) in the left-right direction”). The extending portion 522B is a plate-like portion that extends forward from the left end of the extending portion 521B. A holder protrusion 53 </ b> B is provided on the lower surface of the portion connected to the fourth end 54 in the third end 53. The holder protrusion 53B includes extending portions 531B and 532B. The extending portion 531B is a plate-like portion that protrudes leftward with respect to the third end surface 53A. The length in the left-right direction of the extending portion 531B is the length in the left-right direction between the lower end of the left end 24C of the fourth extending portion 24A and the right end of the rear first regulating member 231B (see FIG. 3) (hereinafter referred to as the left-side length). , Also referred to as “the length of the groove portion 231C (see FIG. 3) in the left-right direction”). The extending portion 532B is a plate-like portion extending forward from the left end of the extending portion 531B.

  As shown in FIG. 7, a first holder engagement portion 541A and second holder engagement portions 542A and 542B are provided on the fourth end surface 54A of the fourth end portion 54. The first holder engaging portion 541A protrudes to the right from the center of the fourth end surface 54A in the up-down direction and from the front side of the front-rear direction center. The second holder engaging portion 542A protrudes to the right from the upper side in the vertical direction of the fourth end face 54A and from the rear side in the front-rear direction. The second holder engagement portion 542B protrudes to the right from the lower side of the fourth end surface 54A and the rear side of the front and rear direction center.

  The deflection unit 59 is detachably supported on the housing 12. FIG. 8 shows a state before the deflection unit 59 is attached to the housing 12. The deflection unit 59 has the holder 5 from the rear side with respect to a region covered in the vertical direction by the first extending portion 22A of the first housing 22 and the second extending portion 23A of the second housing 23. By moving to the front side, it is attached to the housing 12. In the process in which the deflection unit 59 is attached to the housing 12, the holder protrusion 52B of the holder 5 enters the groove 221C of the first extension 22A from the rear side, and the holder protrusion 53B of the holder 5 extends to the second extension. It enters the groove portion 231C (see FIG. 3) of the exit portion 23A from the rear side. The second end 52 of the holder 5 moves in parallel below the first back surface 22B (see FIG. 3) of the first extending portion 22A of the housing 12 along the first back surface 22B. The third end portion 53 of the holder 5 moves in parallel along the second back surface 23B on the upper side of the second back surface 23B (see FIG. 3) of the second extending portion 23A of the housing 12.

  In the process in which the deflection unit 59 is attached to the housing 12, the first holder engaging portion 541A (see FIG. 7) is moved to the housing engaging portion 241 (see FIG. 3) provided at the left end 24C of the fourth housing 24. ) From the rear side. When further force is applied to the front side with respect to the holder 5, the fourth end portion 54 bends to the left side, so that the first holder engaging portion 541 A gets over the left side of the housing engaging portion 241 and moves to the housing. It moves to the front side of the body engaging portion 241.

  FIG. 9 shows a state where the deflection unit 59 is mounted on the housing 12. The front end of the first end portion 51 of the holder 5 comes into contact with the vicinity of the left end 21C of the third back surface 21B (see FIG. 8) of the third extending portion 21A of the third housing 21 from the rear side. Thereby, the forward movement of the holder 5 is restricted. The deflection unit 59 is disposed in a region covered in the vertical direction by the first extending portion 22A of the first housing 22 and the second extending portion 23A of the second housing 23.

  Of the first end surface 51A (see FIG. 7) of the first end portion 51 of the holder 5, the left side surface of the second restricting member 211 (see FIG. 8) is in contact with the position including the center in the vertical direction. The front first regulating member 221A (see FIG. 4) is in contact with the upper position of the left end surface of the first end portion 51 of the holder 5. The right side surface of the front first regulating member 231A (see FIG. 4) is in contact with the lower position of the left end surface of the first end portion 51 of the holder 5.

  The length between the right end of each of the front first restriction members 221 </ b> A and 231 </ b> A and the left end of the second restriction member 211 is the length (thickness) in the left-right direction of the first end 51 of the holder 5. equal. Therefore, in a state where the deflection unit 59 is mounted on the housing 12, the right end surfaces of the first front regulating members 221 </ b> A and 231 </ b> A and the left end surface of the second regulating member 211 are in the left-right direction on the front side of the holder 5. Restrict movement.

  The extension 521B of the holder protrusion 52B (see FIG. 6) fits into the groove 221C. The right end of the extending portion 521B, that is, the rear end portion of the second end surface 52A is in contact with the upper end portion of the left end 24C of the fourth extending portion 24A constituting the groove portion 221C. The left end of the extending portion 521B is in contact with the right end of the rear first restriction member 221B. The extending portion 531B of the holder protruding portion 53B (see FIG. 6) fits into the groove portion 231C. The right end of the extending portion 531B, that is, the rear end portion of the third end surface 53A is in contact with the lower end portion of the left end 24C of the fourth extending portion 24A constituting the groove portion 231C. The left end of the extending portion 531B is in contact with the right end of the rear first restriction member 231B.

  The upper surface of the second end portion 52 (see FIG. 6) of the holder 5 is below the first back surface 22B (see FIG. 3) of the first extending portion 22A of the housing 12, and the second end portion 52 is located below. The holder projecting portion 52B is disposed so as to be opposed to and separated from the upper projecting portion 52B. The lower surface of the third end portion 53 (see FIG. 6) of the holder 5 is located above the second back surface 23B (see FIG. 3) of the second extending portion 23A of the housing 12 and the third end portion 53. The holder projecting portion 53B is disposed so as to be opposed to each other while being separated by a downward projecting amount.

  Note that the length of the extending portion 521B in the left-right direction is equal to the length of the groove portion 221C in the left-right direction. Further, the length of the extending portion 531B in the left-right direction is equal to the length of the groove portion 231C in the left-right direction. Therefore, the right end of the rear first regulating member 221B and the upper end of the left end 24C of the fourth extending portion 24A in the state where the deflection unit 59 is attached to the housing 12 are the rear of the holder 5. Side to side movement is restricted. When the deflection unit 59 is mounted on the housing 12, the right end of the rear first restriction member 231 </ b> B constituting the groove 231 </ b> C and the lower end of the left end 24 </ b> C of the fourth extension 24 </ b> A are Regulate direction movement.

  In a state where the deflection unit 59 is mounted on the housing 12, the front side surface of the housing engaging portion 241 (see FIG. 3) is in contact with the rear side surface of the first holder engaging portion 541A (see FIG. 7). The rear side surface of the housing engaging portion 241 contacts the front side surface of each of the second holder engaging portions 542A and 542B. Thus, the first holder engaging portion 541A and the second holder engaging portions 542A and 542B engage with the housing engaging portion 241. Therefore, the movement of the holder 5 in the front-rear direction is restricted by the housing engaging portion 241 and the state where the deflection unit 59 is attached to the housing 12 is maintained. In a state where the deflection unit 59 is mounted on the housing 12, the transparent member 58 is disposed on the right side of the right end of the half mirror 56, in other words, on the right side of the front end of the half mirror 56 inclined toward the front right side. The holder 5 is held by the housing 12 in a state where the normal lines of the first end surface 51A to the fourth end surface 54A (see FIG. 7) extend in parallel with the left-right direction.

  As shown in FIG. 10, a predetermined line segment S <b> 2 extending in the left-right direction through the surfaces 56 </ b> B and 56 </ b> C of the half mirror 56 and the transmission surface of the transparent member 58 is defined. An intersection point C2 where the line segment S2 and the surfaces 56B and 56C intersect is defined. An intersection point C3 where the line segment S2 and the transmission surface intersect is defined. A predetermined line segment H2 extending along the normal line at the intersection C2 of the surface 56B (hereinafter simply referred to as “the normal line of the half mirror 56”) is defined. A predetermined line segment H3 extending along the normal line at the intersection C3 of the transparent member 58 is defined. In this case, the angle θ1, which is an acute angle among the angles formed by the line segment H2 and the line segment S2, is the surface 56B of the half mirror 56 and the surfaces of the first end surface 51A to the fourth end surface 54A (see FIG. 7). It is 45 degrees which is the same as the acute angle formed by. In addition, the angle θ2 that is an acute angle among the angles formed by the line segment H3 and the line segment S2 is an acute angle formed by the transmission surface of the transparent member 58 and each of the first end surface 51A to the fourth end surface 54A. The same 10 degrees.

  As shown in FIG. 9, the fourth end 54 (see FIG. 7) of the holder 5 is disposed on the left side of the left end 24 </ b> C of the fourth housing 24. The holder 5 holds the half mirror 56 on the left side of the fourth end surface 54 </ b> A of the fourth end portion 54. Accordingly, the surfaces 56B and 56C of the half mirror 56 are arranged on the left side of the left end 24C. Further, the front end of the first end portion 51 of the holder 5 is in contact with the vicinity of the left end 21 </ b> C of the third extending portion 21 </ b> A of the third housing 21. Accordingly, the surfaces 56B and 56C of the half mirror 56 are arranged on the left side of the left end 21C.

  As shown in FIG. 2, the left-right direction position of the left end 56D of the half mirror 56 is the leftmost portion 224 of the left end 22C of the first extension portion 22A and the left end 23C of the second extension portion 23A. It is arranged on the left side of each of the leftmost portions 234. For this reason, the left end 56D of the half mirror 56 slightly protrudes to the left from the first extending portion 22A and the second extending portion 23A. Further, the left end 56D of the half mirror 56 is disposed at the same position as the portion 224 of the left end 22C of the first extending portion 22A in the front-rear direction. Similarly, the left end 56D of the half mirror 56 is disposed at the same position as the portion 234 of the left end 23C of the second extending portion 23A in the front-rear direction.

<Overview of operation>
An outline of the operation of the HMD 1 will be described. First, the user wears the HMD 1 wearing tool 8 (see FIG. 1) on the head. The user has the main body member 11 (see FIG. 1) with the deflection unit 59 (see FIG. 1) mounted on the housing 12, and the half mirror 56 (see FIG. 1) is disposed in front of the left eye. Adjust the position so that.

  Output of image data is started from an external device (not shown). The control board 73B (see FIG. 5) receives the image data via the communication line 28 (see FIG. 2). The control board 73B displays an image corresponding to the received image data on the liquid crystal panel 72B. The image light of the image displayed on the liquid crystal panel 72B passes through the glass substrate 72A and the cylindrical member 71A to the left, and exits from the image unit 7 to the left. The image light emitted from the image unit 7 passes through the plurality of lenses 63 of the lens unit 6 to the left, and exits from the lens unit 6 to the left. The image light passes through the transmission surface of the transparent member 58 from the right side to the left side and enters the half mirror 56. The half mirror 56 reflects the image light transmitted through the transparent member 58 to the rear side. The image light passes through the left side of the left end 24C of the fourth extension 24A of the fourth housing 24 and enters the left eye of the user. Further, the half mirror 56 transmits outside light that has passed through the left side of the left end 21 </ b> C of the third extending portion 21 </ b> A of the third housing 21 and entered from the front side to the rear side. The external light transmitted through the half mirror 56 passes on the left side of the left end 24C of the fourth extension 24A of the fourth housing 24 and enters the left eye of the user. Accordingly, the user recognizes the main body member 11 of the HMD 1 by superimposing a virtual image on the front scene.

When the user rotates the operation member 3, the adjustment mechanism 4 rotates according to the rotation of the operation member 3. The convex portion 64 (see FIG. 5) moves along a cam groove (not shown) of the adjusting mechanism 4. The lens unit 6 moves in the left-right direction according to the rotation of the adjustment mechanism 4.
As shown in FIG. 11, when the operation member 3 rotates and the lens unit 6 moves to the leftmost side, the left end of the holding member 61 of the lens unit 6 is located to the right of the left end 24C of the fourth extending portion 24A. Close to. In the state where the lens unit 6 has moved to the left most, the left end of the holding member 61 is disposed on the right side of the left end 24C and does not protrude to the left side of the left end 24C.

<Effect>
As described above, in the HMD 1, the image light emitted from the image unit 7 passes through the lens unit 6 and the transparent member 58 and is deflected backward by the half mirror 56. The deflected image light passes through the left side of the left end 24C of the fourth extension 24A and is guided to the user's eyes. Thus, the user can recognize the image indicated by the image light. Of the housing 12 of the HMD 1, the first extending portion 22A and the second extending portion 23A cover the half mirror 56 from the vertical direction. Further, the half mirror 56 is in a state where an acute angle θ1 among the angles formed by the line segment H2 extending along the normal line of the half mirror 56 and the line segment S2 extending in the left-right direction is 45 degrees. It is held by the housing 12. The transparent member 58 is held by the housing 12 in a state where the acute angle of the angle θ2 formed by the line segment H3 extending along the normal line of the transparent member 58 and the line segment S2 is 10 degrees. In this case, the acute angle among the angles formed by the line segment H2 and the line segment H3 is 35 degrees obtained by subtracting the angle θ2 from the angle θ1. For this reason, the gap between the half mirror 56 and the transparent member 58 becomes narrower than when the normal line of the transparent member 58 extends in parallel with the left-right direction.

  In the HMD 1, the left end 24 </ b> C of the fourth extension portion 24 </ b> A is disposed on the right side of the half mirror 56 so that the image light emitted toward the rear side from the half mirror 56 is not shielded by the housing 12. Yes. For this reason, a large opening is formed on the rear side of the housing 12, and the user's finger can easily come into contact with the half mirror 56. On the other hand, by setting it as said structure, it becomes difficult for a finger to enter between the half mirror 56 and the transparent member 58, and a user's finger becomes difficult to contact the half mirror 56. FIG. Therefore, the HMD 1 can appropriately prevent the half mirror 56 from being soiled by finger contact.

  When image light emitted from the image unit 7 is reflected by the transmission surface of the transparent member 58 while the normal line of the transparent member 58 is held in a direction extending in the left-right direction, the image light is reflected in a direction along the normal line. The process returns to the image unit 7. In this case, a phenomenon in which image light reciprocates between the display surface of the liquid crystal panel 72B of the liquid crystal display device 72 included in the image unit 7 and the surface of the transparent member 58 may occur. In this case, the visibility of the image by the user may be deteriorated. On the other hand, when the angle θ2 that is the acute angle between the line segment H3 and the line segment S2 extending from the normal line of the transparent member 58 is 10 degrees as in the above embodiment, the transmission surface of the transparent member 58 The image light reflected by is emitted in the direction of the normal line of the transparent member 58, in other words, in a direction inclined 10 degrees to the right rear with respect to the image unit 7 side. For this reason, the HMD 1 can suppress the image light from being reflected by the transmission surface of the transparent member 58 and returning to the image unit 7. Therefore, the HMD 1 suppresses the occurrence of a phenomenon in which the image light emitted from the image unit 7 reciprocates between the display surface of the liquid crystal panel 72B of the liquid crystal display device 72 included in the image unit 7 and the surface of the transparent member 58. it can. In this case, the HMD 1 can make the user recognize a good image while preventing the half mirror 56 from being soiled by a finger.

  In the above, since the liquid crystal panel 72B is a reflective liquid crystal panel, the problem that image light reciprocates between the display surface of the liquid crystal panel 72B and the surface of the transparent member 58 is more likely to occur. For this reason, the HMD 1 sets the angle θ2 to 10 degrees to prevent the half mirror 56 from being soiled by the finger, and the image light reciprocates between the display surface of the liquid crystal panel 72B and the surface of the transparent member 58. The occurrence of problems can be effectively suppressed.

  The curved portion 223 between the rear end 22R and the left end 22C of the first extending portion 22A is curved in a convex shape toward the outside of the first extending portion 22A. The curved portion 233 between the rear end 23R and the left end 23C of the second extending portion 23A is curved in a convex shape toward the outside of the second extending portion 23A. The curved portions 223 and 233 can inhibit the finger from approaching the surface 56B of the half mirror 56 from the left rear. Therefore, the HMD 1 can appropriately suppress contamination of the surface 56B of the half mirror 56 by the user's finger.

  In the above embodiment, the left end 21 </ b> C of the third extending portion 21 </ b> A is disposed on the right side of the half mirror 56. In this case, the HMD 1 can allow the light in front of the user's eyes to pass through the left side of the left end 21 </ b> C of the third extending portion 21 </ b> A and enter the half mirror 56. In this case, the HMD 1 can cause the user to recognize the image indicated by the image light on the scenery in front of the eyes. Further, the curved portion 222 between the front end 22F and the left end 22C of the first extension portion 22A is curved in a convex shape toward the outside of the first extension portion 22A. A curved portion 232 between the front end 23F and the left end 23C of the second extending portion 23A is curved in a convex shape toward the outside of the second extending portion 23A. The curved portions 222 and 232 can prevent the finger from approaching the front surface 56C of the half mirror 56 from the left front. Therefore, the HMD 1 can appropriately suppress contamination of the surface 56C of the half mirror 56 by the user's finger.

  In the HMD 1, the deflection unit 59 is detachably supported between the first extension portion 22A and the second extension portion 23A of the housing 12. For this reason, the HMD 1 can easily replace the half mirror 56 and the transparent member 58 provided in the deflection unit 59.

The left-right direction, the front-rear direction, and the up-down direction in the above embodiment are examples of the “first direction”, “second direction”, and “third direction” of the present invention, respectively. The left side and the right side are examples of “one side in the first direction” and “the other side in the first direction” of the present invention, respectively. The rear side and the front side are examples of “one side in the second direction” and “the other side in the second direction” of the present invention, respectively. The upper side and the lower side are examples of “one side in the third direction” and “the other side in the third direction” of the present invention, respectively. The image unit 7 is an example of the “image light forming unit” in the present invention. The half mirror 56 is an example of the “deflecting member” in the present invention. The surface 56B of the half mirror 56 is an example of the “plane” in the present invention. The angle θ1 is an example of the “first angle” in the present invention. The angle θ2 is an example of the “second angle” in the present invention, and the left end 24C of the fourth extending portion 24A is an example of the “first notch end” in the present invention. The liquid crystal panel 72B is an example of the “reflective liquid crystal display device” in the present invention. The left end 21C of the third extending portion 21A is an example of the “second notched end” in the present invention.
<Modification>

  In addition, this invention is not limited to the said embodiment, A various change is possible. In the above-described embodiment, the left end 56D of the left end 56D of the half mirror 56 is positioned at the leftmost portion 224 of the left end 22C of the first extending portion 22A and the leftmost portion 23C of the left end 23C of the second extending portion 23A. The portion 234 is arranged on the left side of each of the portions 234. For this reason, the left end 56D of the half mirror 56 slightly protrudes to the left from the first extension portion 22A and the second extension portion 23A. On the other hand, as shown in FIG. 12, the left end 56D of the half mirror 56 is more than the portion 224 of the left end 22C of the first extending portion 22A and the portion 234 of the left end 23C of the second extending portion 23A. , May be arranged on the right side. In this case, the left end 56D of the half mirror 56 does not protrude to the left with respect to the first extending portion 22A and the second extending portion 23A. For this reason, the first extending portion 22 </ b> A and the second extending portion 23 </ b> A can appropriately protect up to the left end 56 </ b> D of the half mirror 56.

  As shown in FIG. 13, the left end 56D of the half mirror 56 may be disposed at the same position as the portion 224 of the left end 22C of the first extension portion 22A in the front-rear direction. Similarly, the left end 56D of the half mirror 56 may be disposed at the same position as the portion 234 of the left end 23C of the second extending portion 23A in the front-rear direction. In this case, the HMD 1 protects the half mirror 56 from the vertical direction by the first extending portion 22A and the second extending portion 23A, while the portion other than the portion 224 of the left end 22C of the first extending portion 22A, and The length in the left-right direction can be reduced at a portion other than the portion 234 in the left end 23C of the second extending portion 23A. Therefore, the HMD 1 can reduce the size of the main body member 11.

  In the above modification, the left end 56D of the half mirror 56, the left end 22C portion 224 of the first extending portion 22A, and the left end 23C portion 234 of the second extending portion 23A have the same position in the left-right direction. It may be.

  In the above embodiment, the transparent member 58 is inclined such that the acute angle formed by the line segment H3 extending along the normal line and the line segment S2 extending in the left-right direction is the angle θ2. In the present invention, the transparent member 58 may be further tilted so that the angle formed by the line segment H3 and the vertical direction is a predetermined angle.

  In the above embodiment, the angle θ1 is 45 degrees. In the present invention, the angle θ1 is not limited to 45 degrees, and may be any angle other than 45 degrees. In the above embodiment, the angle θ2 is 10 degrees. In the present invention, the angle θ2 is not limited to 10 degrees, and may be any angle smaller than θ1. The liquid crystal panel 72B of the image unit 7 in the above embodiment is a reflective liquid crystal panel. In the present invention, the liquid crystal panel 72B is not limited to a reflective liquid crystal panel, and may be a transmissive liquid crystal panel.

  In the above embodiment, the configuration on the housing 12 side for holding the deflection unit 59 in the housing 12 (front first regulating member 221A, 231A, rear first regulating member 221B, 231B, second regulating member 221, housing The body engagement portion 241) and the configuration of the deflection unit 59 (first holder engagement portion 541A and second holder engagement portions 542A and 542B) can hold the deflection unit 59 in the housing 12. Can be changed to another configuration.

  In the above-described embodiment, the curved portions 222 and 223 of the first extension portion 22A and the curved portions 232 and 233 of the second extension portion 23A are each curved outwardly. In the present invention, the front end 22F and the rear end 22R of the first extension portion 22A may extend in parallel with the left-right direction. The left end 22C of the first extension 22A may extend in parallel with the front-rear direction. The curved portions 222 and 223 of the first extension portion 22A may be angular. Similarly, the front end 23F and the rear end 23R of the second extending portion 23A may extend in parallel with the left-right direction. The left end 23C of the second extending portion 23A may extend in parallel with the front-rear direction. The curved portions 232 and 233 of the second extending portion 23A may be angular.

  In the above embodiment, the deflection unit 59 is detachably supported with respect to the housing 12. In the present invention, the deflection unit 59 may not be detachable from the housing 12. In the above-described embodiment, the HMD 1 may be configured only with the main body member 11 without including the mounting tool 8 and the connection tool 9. The body member 11 may be directly fixed to glasses or the like. Further, the HMD 1 may be configured by the connection tool 9 and the main body member 11 without including the mounting tool 8.

  In the above embodiment, the surfaces 56B and 56C of the half mirror 56 are more than the left end 21C of the third extending portion 21A of the third housing 21 and the left end 24C of the fourth extending portion 24A of the fourth housing 24. Arranged on the left side. On the other hand, in the surfaces 56B and 56C of the half mirror 56, it is only necessary that the part necessary for exhibiting the function as the deflecting member is arranged on the left side of the left ends 21C and 24C, and the other parts are , May be arranged on the right side of the left ends 21C, 24C. In addition, the site | part required in order to exhibit the function as a deflection | deviation member shows the site | part which can permeate | transmit or reflect image light among the surfaces 56B and 56C, for example.

1: HMD
5: Holder 6: Lens unit 7: Image unit 12: Housing 21: Third housing 21A: Third extending portion 21C: Left end 22: First housing 22A: First extending portion 22C: Left end 22F: Front end 22R: rear end 23: second housing 23A: second extension 23C: left end 23F: front end 23R: rear end 56: half mirror 56B: surface 56D: left end 58: transparent member 59: deflection unit 72: liquid crystal display device 72B: Liquid crystal panel 121: Opening part 122: Opening part 222: Curved part 223: Curved part 224: Part 232: Curved part 233: Curved part 234: Part

Claims (8)

A housing,
An image light forming section that is a member covered by the housing and capable of emitting image light toward one side in the first direction;
A member provided on the one side in the first direction with respect to the image light forming unit, having a flat surface on one side in a second direction orthogonal to the first direction, from the image light forming unit The emitted image light is deflected to the one side in the second direction, and the acute angle formed by the direction of the normal line of the plane and the first direction is set to the case with the first angle being the first angle. A deflecting member to be held;
Provided between the one end portion of the image light forming portion in the first direction and the other end portion of the deflection member in the first direction, and having a transmission surface that transmits the image light. And a transparent member held by the housing in a state where an acute angle formed by the normal direction of the transmission surface and the first direction is a second angle smaller than the first angle,
The housing is
A first extending portion disposed on one side of a third direction orthogonal to the first direction and the second direction with respect to the deflection member;
A second extending portion disposed on the other side in the third direction with respect to the deflection member;
Each of the first extension part and the second extension part is provided between the end portions on the one side in the second direction, and in the first direction of the image light forming part. A first notch end disposed on the one side in the first direction rather than the end on the one side;
The image display device according to claim 1, wherein the first notch end portion is located on the other side in the first direction with respect to the deflection member in the first direction.   The image display apparatus according to claim 1, wherein the second angle is 10 degrees or more.   The image display device according to claim 2, wherein the image light forming unit includes a reflective liquid crystal display device.   Each of the first extension part and the second extension part has a portion between the end on the one side in the first direction and the end on the one side in the second direction facing outward. The image display device according to claim 1, wherein the image display device is curved in a convex shape.   Each of the first extension part and the second extension part most protruded to the one side in the first direction is the one side in the first direction of the deflection member in the first direction. 5. The image display device according to claim 1, wherein the image display device is disposed at the same position as the end of the first side or at the one side in the first direction. The housing is
Each of the first extension part and the second extension part is provided between end portions on the other side in the second direction, and the image light forming part is provided in the first direction. A second notch end portion disposed on the one side in the first direction rather than an end portion on one side;
The second notch end portion is located on the other side of the first direction with respect to the deflecting member in the first direction, and each of the first extension portion and the second extension portion, The portion between the end portion on the one side in the first direction and the end portion on the other side in the second direction is curved in a convex shape toward the outside. An image display device according to claim 1.   Each of the first extension portion and the second extension portion most protruded toward the one side in the first direction is the one side in the first direction of the deflection member in the second direction. The image display device according to claim 5, wherein the image display device is disposed at the same position as the end of the image. A deflection unit having the transparent member and the deflection member;
The image display apparatus according to claim 1, wherein the deflection unit is detachably supported between the first extension part and the second extension part.

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