JP5423739B2 - Head mounted display - Google Patents

Description

  The present invention relates to a head mounted display.

  2. Description of the Related Art Conventionally, a head-mounted display (hereinafter referred to as “HMD”) that displays an image so as to be visually recognized as an image in front of a user's eye is known. The HMD includes an image light generator, an eyepiece optical system, and a deflection member. The image light generator generates image light based on the image information. The eyepiece optical system guides the image light generated by the image light generator in a certain direction. The deflecting member deflects (reflects, refracts, diffracts, etc.) the image light emitted from the eyepiece optical system and enters the user's eyes. When a reflecting member is used as the deflecting member, it is desirable to use a reflecting member obtained by performing vapor deposition on a transparent resin substrate from the viewpoint of safety and weight reduction. When the user observes the HMD image light superimposed on the actual outside world, a so-called see-through type HMD uses a half mirror (hereinafter referred to as HM) as a reflecting member. In this case, for example, an HMD is known that can open and close an opening of a housing of the HMD by pivotally supporting one end of the HM (see, for example, Patent Document 1).

JP 2010-175829 A

  However, if one end of the HM is pivotally supported, there is a problem that the HM rotates and is out of the field of view and the image cannot be seen. Accordingly, the applicant of the present application has studied an HMD that restricts the backlash of the HM. FIG. 10 shows a cross-sectional view of a half mirror holder 70 (hereinafter referred to as HM holder 70) used in such an HMD. The HM holder 70 is attached to one end of the HMD housing that opens. The HM holder 70 holds the HM 80. The HM holder 70 includes a pair of wall portions 71 (only one is shown in FIG. 10). The pair of wall portions 71 are erected with a space therebetween. The pair of wall portions 71 hold the HM 80 therebetween. Boss portions 85 and 88 are provided at a pair of opposite ends of the HM 80, respectively. The pair of wall portions 71 are pivotally supported around a pair of boss portions 85 of the HM 80 so as to be rotatable. The HM holder 70 includes a stopper portion 75 and a rotation prevention portion 72. The stopper portion 75 contacts the rear end portion of the HM 80 so that the HM 80 stops at a position where the image light can be introduced into the user's eyeball. The rotation preventing unit 72 contacts the boss portion 88 of the HM 80 so that the HM 80 does not rotate.

  However, stress (arrows A1 and A2 in FIG. 10) is applied to the portion that contacts the stopper portion 75 and the portion that contacts the rotation prevention portion 72. Since the HM80 is made of resin, the reflection surface of the HM80 is distorted in the area between them, and there is a problem that the image appears blurred and distorted.

  An object of the present invention is to solve the above-described problems, and is to provide a head-mounted display that can reduce distortion generated in a reflection plate while suppressing backlash of the resin reflection plate.

  The head-mounted display according to the first aspect of the present invention is attached to a mounting member that is mounted on a user's head, and image light is incident on the user's eyes based on image information to the user. In a head-mounted display that recognizes image light, an image light generation unit that generates image light, an eyepiece optical system that guides image light generated by the image light generation unit in a certain direction, the image light generation unit, and the eyepiece optical system A resin-made reflecting plate that reflects at least a part of the emitted light of the eyepiece optical system and enters the user's eye, and an opening through which the emitted light is emitted. And a holder that is sandwiched by applying a predetermined stress and formed of a material that is less rigid than the reflector.

  In the head mounted display according to the first aspect, the holder for holding the resin-made reflecting plate is made of a material having a rigidity lower than that of the reflecting plate, so that the stress for holding the reflecting plate can be released to the holder side. . Thereby, the distortion which arises in a reflecting plate can be reduced, suppressing the backlash of a reflecting plate. Image distortion can be prevented by reducing the distortion of the reflector.

  In the first aspect, the end portion of the reflecting plate is provided with a first boss portion extending in a direction away from the end portion, and the holder is provided with a receiving portion for receiving the first boss portion. It may be done. Since the receiving part provided in the holder receives the 1st boss part provided in the edge part of a reflecting plate, a reflecting plate can be positioned with respect to a holder.

  In the first aspect, the reflection plate includes a pair of end portions facing each other, the first boss portions are provided at the pair of end portions, respectively, and the holder includes the pair of first boss portions. A pair of the receiving portions for receiving each may be provided. Since the pair of first boss portions provided on the reflecting plate is sandwiched between the pair of receiving portions provided on the holder, the reflecting plate can be positioned with respect to the holder with an unreasonable force.

  In the first aspect, a first dimension that is a separation distance inside the pair of receiving portions may be smaller than a second dimension sandwiched between the pair of end portions of the reflecting plate. Therefore, the holder can be easily held by applying a predetermined stress to the pair of end portions of the reflecting plate by the pair of receiving portions.

  In the first aspect, the diameter of the first boss portion is larger than the thickness of the reflecting plate, and the first boss portion reflects the emitted light of the reflecting plate in the thickness direction of the end portion. It may be provided at a position shifted to the opposite side to the reflection surface so as not to protrude from the reflection surface. Since the diameter of the boss is larger than the thickness of the reflector, it is resistant to external impact. Therefore, the reflector can be securely held by the holder. Furthermore, since the boss portion is provided at a position shifted to the opposite side of the reflecting surface so as not to protrude from the reflecting surface of the reflecting plate, the influence of molding on the reflecting surface side can be reduced.

  Moreover, the 1st aspect WHEREIN: The said 1st boss | hub part may be provided in the said edge part in the position corresponding to the center of the area | region where the said emitted light reflects among the said reflective surfaces. Outgoing light incident on the reflecting surface has less aberration at the central portion near the optical axis, and becomes larger as the distance from the optical axis increases. Therefore, the central portion of the region where the outgoing light is reflected has a smaller aberration of the outgoing outgoing light than the corner portion. By providing the boss part at a position corresponding to the center of the area where the emitted light is reflected at the end of the reflector, the deformation of the reflecting surface due to the stress applied to the boss part is the center of the area where the emitted light close to the boss part is reflected. Compared to the above, it becomes smaller at the corner where the outgoing light is reflected. Therefore, image distortion due to the influence of the deformation of the reflecting surface caused by the stress applied to the boss portion can be minimized.

  In the first aspect, the end portion of the reflecting plate is provided with a second boss portion extending in a direction away from the end portion, and the reflecting plate includes the first boss portion on the holder. An abutting portion that abuts on the second boss portion when attempting to rotate about the center may be provided. Even if the reflection plate tries to rotate around the first boss portion, the second boss portion of the reflection plate contacts the contact portion of the holder. Therefore, it can prevent that a reflecting plate rotates.

  Further, in the first aspect, the housing is provided with an attachment portion for attachment to the frame, and the opening is disposed at a position close to the eyes of the user when the attachment portion is attached to the frame. The housing may be disposed in a direction away from the user's head. Therefore, since the reflector, the holder, and the housing are arranged in this order away from the user's eyes, the user's field of view can be widened.

It is a perspective view of the spectacles frame 91 which attached HMD1. It is a top view of HMD1. It is the II sectional view taken on the line in FIG. It is the perspective view seen from the upper part of HM holder 5. FIG. It is the perspective view seen from the lower part of the HM holder 5. FIG. 4 is a plan view of the HM holder 5. FIG. It is a top view of HM8. It is a left view of HM8. FIG. 7 is a cross-sectional view taken along the line II-II in FIG. 6. It is sectional drawing of the conventional HM holder.

  Hereinafter, a head mounted display 1 (hereinafter referred to as an HMD 1) according to an embodiment of the present invention will be described with reference to the drawings. HMD1 shown in FIG. 1 displays an image so that it may be visually recognized as an image ahead of a user's eyes.

  First, the configuration of the HMD 1 will be described with reference to FIGS. In the following description, the vertical direction, the diagonally downward right direction, the diagonally upward left direction, the diagonally upward right direction, and the diagonally downward left direction in FIG. 1 are respectively the vertical direction, forward direction, backward direction, rightward direction, and leftward direction of the HMD1. is there. The lower direction, the upper direction, the right direction, and the left direction in FIG. 2 are the front direction, the rear direction, the right direction, and the left direction of the HMD 1, respectively. The upward direction, downward direction, right direction, and left direction in FIG. 3 are the upward direction, downward direction, right direction, and left direction of the HMD 1, respectively.

  As shown in FIG. 1, the HMD 1 is detachably attached to the spectacle frame 91. The spectacle frame 91 is mounted on the user's head. As shown in FIGS. 1 and 2, the HMD 1 includes a housing 2. The casing 2 is a rectangular tube-shaped resin and is formed in an L shape in plan view (see FIG. 2). The housing 2 includes a projection unit 10 (see FIG. 3). As shown in FIG. 3, the projection unit 10 generates image light and emits it in the left direction through the opening 7 on the left end side of the housing 2. A half mirror holder 5 (hereinafter referred to as HM holder 5) is fixed to the opening 7 on the left side of the housing 2. The HM holder 5 is a resin. As shown in FIGS. 1 to 3, the HM holder 5 holds a half mirror 8 (hereinafter referred to as HM8). HM8 is a resin. The HM 8 reflects at least part of the light emitted from the projection unit 10 and enters the left eyeball (not shown) of the user. The user can visually recognize the image superimposed on the real image in his / her visual field. As shown in FIGS. 1 and 2, a slit 9 </ b> A is provided at the center in the left-right direction on the front surface of the housing 2. A part of the adjuster 16 is exposed in the slit 9A. The user can adjust the focus of an image that can be viewed with the HM 8 by rotating the adjuster 16 in the vertical direction with a finger.

Next, the spectacle frame 91 will be described. As shown in FIG. 1, the spectacle frame 91 includes a left frame portion 92, a right frame portion 93, a central frame portion 94, and an HMD support portion 96. The left frame portion 92 is a portion that is hung on the left ear of the user. The right frame portion 93 is a portion that is hung on the right ear of the user. The center frame portion 94 is provided between the front end portion of the left frame portion 92 and the front end portion of the right frame portion 93. The center frame portion 94 includes a pair of nose pads 95 (only one is shown in FIG. 1) at the center in the longitudinal direction. The HMD support portion 96 is provided on the upper left end side (upper right end in FIG. 1) of the central frame portion 94 as viewed from the user side.
The HMD support part 96 includes a downward extension part 98. The downward extending portion 98 extends in the vertical direction at the left front of the user's face. A tooth portion (not shown) having a saw-toothed unevenness is engraved in the longitudinal direction on the front surface of the downward extending portion 98.

  As shown in FIGS. 1 and 2, a mounting portion 49 is provided in a portion of the housing 2 of the HMD 1 that faces the spectacle frame 91. The mounting portion 49 includes a U-shaped groove 49A (see FIG. 2) along the vertical direction. A leaf spring 49B is provided at the bottom of the U-shaped groove 49A. A downwardly extending portion 98 provided in the HMD support portion 96 of the spectacle frame 91 is inserted into the U-shaped groove 49A. The leaf spring 49B is locked to any peak of the tooth portion provided in the downward extending portion 98. As a result, the HMD 1 can be positioned within a predetermined range in the vertical direction of the user's head.

  Next, the configuration of the projection unit 10 will be described. As shown in FIG. 3, the projection unit 10 is built in the housing 2. The projection unit 10 includes a lens holder 15, an adjuster 16, and a liquid crystal holder 17. The lens holder 15 holds the eyepiece optical system 120. The liquid crystal holder 17 holds the liquid crystal device 101. The liquid crystal device 101 emits image light. The eyepiece optical system 120 houses a plurality of lenses (not shown) and guides image light emitted from the liquid crystal device 101 to the opening 7 of the housing 2. The adjuster 16 has a ring shape. The adjuster 16 is attached to the liquid crystal holder 17 by being extrapolated. A spiral groove cam 17 </ b> A is provided on the outer peripheral surface of the liquid crystal holder 17. An engaging portion (not shown) is provided on the inner peripheral surface of the adjuster 16. The engaging portion engages with the groove cam 17A of the liquid crystal holder 17 and moves along the groove cam 17A. The adjuster 16 is positioned in the vertical and horizontal directions within the housing 2. Therefore, when the adjuster 16 is rotated, the liquid crystal holder 17 is moved in the left-right direction by the action of the groove cam 17A. As a result, the distance between the liquid crystal device 101 and the eyepiece optical system 120 changes, so that the focus adjustment of an image that can be visually recognized by the HM 8 can be performed.

  Next, the structure of the HM holder 5 will be described with reference to FIGS. For convenience of explanation, the direction of the HM holder 5 is defined again with the posture when the HM holder 5 is placed on a horizontal plane. That is, the vertical direction, the left direction, the right direction, the diagonally upward right direction, and the diagonally downward left direction in FIG. 4 are respectively the vertical direction, forward direction, backward direction, right direction, and left direction of the HM holder 5. The vertical direction, the left direction, the right direction, the right diagonally downward direction, and the diagonally left upward direction in FIG. The vertical direction, left direction, and right direction in FIG. 6 are the vertical direction, front direction, and rear direction of the HM holder 5, respectively.

  As shown in FIGS. 4 to 6, the HM holder 5 holds the HM 8 inside. The HM holder 5 includes a right side wall part 51, a left side wall part 52, a front side bottom part 53, and a rear side bottom part 54. The right side wall part 51 and the left side wall part 52 have a substantially triangular shape when viewed from the side, and are provided upright at predetermined intervals in the left-right direction. A holding hole 67 (see FIG. 6) is provided in the vicinity of the top vertex of the right side wall portion 51. The holding hole 67 penetrates the right side wall portion 51 in the plate thickness direction (left-right direction). The diameter of the holding hole 67 is adjusted to be substantially the same as the diameter of a positioning boss portion 35 described later provided in the right end portion 26 of the HM 8. A holding hole 68 is provided near the upper apex of the left side wall 52. The holding hole 68 penetrates in the plate thickness direction (left-right direction) of the left side wall portion 52. The diameter of the holding hole 68 is adjusted to be substantially the same as the diameter of a positioning boss portion 36 described later. The holding holes 67 and 68 are circular.

  As shown in FIGS. 4 and 6, a pressing portion 61 and a rotation suppressing portion 64 are provided on the inner surface of the right wall portion 51 that faces the left wall portion 52. The pressing portion 61 is a cylindrical body that protrudes leftward from the inner surface of the right side wall portion 51 and is positioned coaxially with the holding hole 67. The diameter of the central hole of the pressing portion 61 is the same as the diameter of the holding hole 67. As shown in FIG. 4, the rotation suppressing portion 64 is erected on the inner surface of the right side wall portion 51, and is an upper surface of the rear bottom portion 54 that is below the outer circumferential surface of the pressing portion 61 while drawing a substantially arc from the rear. It extends in a straight line up to 54A. A pressing portion 62 and a rotation suppressing portion 65 are also provided on the inner surface of the left side wall portion 52 that faces the right side wall portion 51. The pressing portion 62 is a cylindrical body that protrudes rightward from the inner surface of the left wall portion 52, and is positioned coaxially with the holding hole 68. The diameter of the central hole of the pressing portion 62 is the same as the diameter of the holding hole 68. As shown in FIGS. 4 and 6, the rotation suppressing portion 65 is erected on the inner surface of the left side wall portion 52, and is a rear bottom portion that draws a substantially circular arc from the outer peripheral surface of the pressing portion 62 to the rear and is below. It extends in a straight line to the upper surface 54A of 54.

  The front bottom part 53 and the rear bottom part 54 are provided between the bottom part of the right side wall part 51 and the bottom part of the left side wall part 52. The front bottom 53 is located on the front side of the HM holder 5. The rear bottom 54 is located behind the HM holder 5. A stopper portion 54B is provided at the center in the left-right direction of the upper surface 54A of the rear bottom portion 54. The stopper portion 54B is depressed in a concave shape. As shown in FIG. 5, an opening 56 is provided between the front bottom 53 and the rear bottom 54. The opening 56 allows the image light emitted from the opening 7 (see FIG. 3) of the projection unit 10 to pass toward the HM 8.

  Next, the structure of the HM8 will be described with reference to FIGS. The upper direction, the lower direction, the left direction, and the right direction in FIG. 7 are the right direction, left direction, front direction, and rear direction of the HM8, respectively. The vertical direction, left direction, and right direction in FIG. 8 are the vertical direction, front direction, and rear direction of the HM 8, respectively. The HM 8 includes a main body portion 21 and a stopper portion 22. The main body 21 is a rectangular plate having a predetermined thickness (for example, 1.5 mm) and having a length in one direction. The main body 21 includes a reflective surface 41 and a back surface 42 (see FIG. 8). The reflection surface 41 is a surface that reflects image light toward the left eyeball of the user. The main body portion 21 includes a front end portion 25, a right end portion 26, a left end portion 27, and a rear connection portion 29. The right end portion 26 is provided with a right side step portion 26A. The right side step portion 26A is located at a portion from the substantially longitudinal center of the right end portion 26 to the rear. The right side step portion 26 </ b> A is one step lower on the center side in the width direction of the main body portion 21.

  A pedestal 31 is provided at the front corner of the right step 26A. The pedestal 31 has a short cylindrical shape. The axial direction of the pedestal portion 31 is orthogonal to the front-rear direction of the main body portion 21. The outer peripheral surface of the pedestal 31 is raised in a semicircular shape from the back surface 42 (see FIG. 4). A positioning boss portion 35 is provided on the right end surface of the pedestal portion 31. The positioning boss portion 35 has a cylindrical shape and is positioned coaxially with the pedestal portion 31. The diameter of the positioning boss portion 35 is smaller than the diameter of the pedestal portion 31, but larger than the plate thickness of the HM 8. A rotation suppression boss portion 38 is provided behind the positioning boss portion 35. The rotation suppression boss portion 38 extends rightward from the right step portion 26A.

  A pedestal 32 is provided at the front corner of the left step 27A. The pedestal 32 has a short cylindrical shape. The axial direction of the pedestal portion 32 is orthogonal to the front-rear direction of the main body portion 21. The outer peripheral surface of the pedestal portion 32 protrudes from the back surface 42 in a semicircular shape. A positioning boss portion 36 is provided on the left end surface of the pedestal portion 32. The positioning boss portion 36 has a cylindrical shape and is positioned coaxially with the pedestal portion 32. Although the diameter of the positioning boss part 36 is also smaller than the diameter of the base part 32, it is larger than the plate | board thickness of HM8. A rotation suppression boss portion 39 is provided behind the positioning boss portion 36. The rotation suppression boss portion 39 extends leftward from the left step portion 27A.

  In the state where the HM holder 5 is attached to the housing 2, the positioning boss portion 36 is located below the HM 8. Therefore, the load of the weight of HM8 is applied to the positioning boss portion 36. Therefore, as shown in FIG. 7, the positioning boss portion 36 is thicker than the positioning boss portion 35. Thereby, since the rigidity of the positioning boss part 36 can be improved, breakage of the positioning boss part 36 of the HM 8 can be prevented.

  The stopper portion 22 is formed in a substantially triangular shape having one apex on the rear side. The stopper portion 22 is connected to the rear connecting portion 29 of the main body portion 21. The stopper portion 22 is bent and inclined toward the back surface 42 with respect to the main body portion 21 at the rear connection portion 29.

  Next, the material of the HM holder 5 and HM8 will be described. In the present embodiment, each material of the HM holder 5 and the HM8 is selected so that the rigidity of the HM holder 5 is lower than the rigidity of the HM8. For example, a transparent resin material (for example, polycarbonate) generally used in the field of the optical system can be selected as the material of HM8. Next, a material having a rigidity lower than that of polycarbonate is selected as the material of the HM holder 5. For example, ABS resin can be selected. The materials are not limited to these, and other materials may be used as long as the above-described conditions are satisfied.

  Next, dimension adjustment of the HM holder 5 and the HM 8 will be described. For example, as shown in FIG. 6, the horizontal dimension, which is the short direction of the HM 8, is X, and the sandwiching dimension of the HM holder 5 is Y. The dimension X is a distance between the right end of the pedestal 31 of the HM 80 and the left end of the pedestal 32. The dimension Y is a state where the HM 8 is not held, and the left end of the pressing portion 61 provided on the inner surface of the right wall 51 in the HM holder 5 and the right end of the pressing portion 62 provided on the inner surface of the left wall 52. It is the distance between the parts. In this embodiment, the dimension Y is prepared slightly narrower than the dimension X. For example, X is 15.1 mm and Y is 14.6 mm. The difference between X and Y is 0.5 mm. The HM 8 is assembled to the HM holder 5 with these X and Y dimensions. The X dimension is an example of the “second dimension” in the present invention, and the Y dimension is an example of the “first dimension” in the present invention.

  Next, a procedure for assembling the HM 8 to the HM holder 5 will be described. As shown in FIGS. 4 to 6, first, the HM 8 is arranged at the center while pushing the right wall 51 and the left wall 52 of the HM holder 5 outward. Next, the positioning boss portion 35 of the HM 8 is inserted into the hole of the pressing portion 61 of the right side wall portion 51 of the HM holder 5. The positioning boss portion 36 of the HM 8 is inserted into the hole of the pressing portion 62 of the left side wall portion 52 of the HM holder 5. Next, the HM holder 5 that has been pushed open is released. The right side wall 51 and the left side wall 52 return to the original state by the elastic restoring force of the resin. Thereby, a portion along the outer periphery of the right end surface of the base portion 31 of the HM 8 is pressed against the left end portion of the pressing portion 61 provided on the inner surface of the right wall portion 51. Further, a portion along the outer periphery of the left end surface of the base portion 32 of the HM 8 is pressed against the right end portion of the pressing portion 62 provided on the inner surface of the left wall portion 52. In this way, the HM 8 is sandwiched and held inside the HM holder 5.

  Next, the effect obtained by the holding structure of the HM 8 of the HM holder 5 will be described. As shown in FIG. 6, the dimension Y is slightly narrower than the dimension X in the HM holder 5 and the HM 8. Therefore, the HM 8 is stressed from the left and right directions by the right side wall 51 and the left side wall 52 of the HM holder 5 at the base portions of the boss portions 51 and 52. Since the HM 8 is sandwiched from the left and right directions, the HM 8 can be prevented from rotating freely around the boss portions 51 and 52. Further, the HM holder 5 is formed of a material having lower rigidity than the HM 8. As a result, it is possible to appropriately release a certain level of stress sandwiching the HM 8 to the HM holder 5 having low rigidity. Therefore, since excessive stress is not applied to the right end portion 26 and the left end portion 27 of the HM 8, the reflection surface of the HM 8 is not distorted. Therefore, in a state where the HM holder 5 is attached to the housing 2, it is possible to effectively prevent the image that the user can visually recognize with the HM 8 from being blurred and distorted.

  Further, as shown in FIG. 7, the diameters of the positioning boss portions 35 and 36 of the HM8 are larger than the plate thickness of the HM8. For example, when the plate thickness of HM8 is 1.5 mm, the positioning boss portion 35 is 2.6φ. Therefore, since the positioning boss portions 35 and 36 are resistant to external impact, the HM 8 can be stably held with respect to the HM holder 5.

  Further, as shown in FIGS. 8 and 9, the positioning boss portions 35 and 36 are provided at positions shifted to the opposite side of the reflective surface 41 so as not to protrude from the reflective surface 41 of the HM 8. Therefore, it is possible to reduce the influence of the molding on the reflecting surface side.

  As shown in FIGS. 7 and 8, the positioning boss portions 35 and 36 (the positioning boss portion 35 is not shown in FIG. 8) are emitted from the reflecting surface 41 at the right end portion 26 and the left end portion 27 of the HM 8. Is provided at a position corresponding to the center of the region where the light is reflected. The outgoing light incident on the reflecting surface 41 has less aberration at the central portion closer to the optical axis, and the aberration increases as the distance from the optical axis increases. Therefore, the central portion of the region where the outgoing light is reflected has a smaller aberration of the outgoing outgoing light than the corner of the HM80. Therefore, the positioning boss portions 35 and 36 are provided at positions corresponding to the center of the region where the emitted light is reflected at the right end portion 26 and the left end portion 27 of the HM 8. Thereby, the deformation of the reflection surface 41 due to the stress applied to the positioning boss portions 35 and 36 is smaller at the corners where the emitted light is reflected than in the center of the region where the emitted light near the positioning boss portion 36 is reflected. Therefore, in a state where the HM holder 5 is attached to the housing 2, image distortion due to the influence of the deformation of the reflecting surface 41 caused by the stress applied to the positioning boss portions 35 and 36 can be minimized.

  4, 6, and 9, when the HM holder 5 is attached to the housing 2, the stopper portion 22 can come into contact with the stopper portion 54 </ b> B of the rear bottom portion 54 of the HM holder 5. It is. Thus, even when the HM8 is rotated and displaced, the HM8 can be easily and quickly returned to the normal position by pressing the stopper portion 22 against the stopper portion 54B. The normal position is a position where image light can be introduced into the user's eyeball.

  Further, as shown in FIG. 7, the right end portion 26 and the left end portion 27 of the HM 8 are provided with rotation suppression boss portions 38 and 39 extending in a direction away from the end portions. As shown in FIGS. 4 and 9, the HM holder 5 is provided with rotation suppressing portions 64 and 65 (see FIG. 6). Therefore, even if the HM 8 tries to rotate around the positioning boss portions 35 and 36, the rotation suppression boss portions 38 and 39 of the HM 8 abut against the rotation suppression portions 64 and 65 of the HM holder 5. Therefore, it can be prevented that the HM8 rotates without permission and the HM8 is removed from the field of view.

  In the above description, the eyeglass frame 91 shown in FIG. 1 is an example of the “frame” of the present invention. The liquid crystal device 101 shown in FIG. 3 is an example of the “image light generator” in the present invention. The eyepiece optical system 120 is an example of the “eyepiece optical system” in the present invention. The HM holder 5 is an example of the “holder” in the present invention. HM8 is an example of the “reflector” in the present invention. The positioning boss portions 35 and 36 shown in FIG. 7 are an example of the “first boss portion” in the present invention. The rotation suppression boss portions 38 and 39 are an example of the “second boss portion” in the present invention. The right side wall 51, the pressing part 61, the left side wall 52, and the pressing part 62 of the HM holder 5 shown in FIG. 6 are examples of the “receiving part” of the present invention.

  As described above, in the HMD 1 of the present embodiment, the HM holder 5 that holds the resin-made HM 8 is formed of a material that is less rigid than the HM 8. Therefore, the stress that holds the HM 8 can be released to the HM holder 5 side. As a result, distortion generated in the HM 8 can be reduced while suppressing the backlash of the HM 8. By reducing the distortion of the HM8, it is possible to prevent distortion of the image that can be visually recognized by the user with the HM8.

  Further, in the present embodiment, as shown in FIG. 7, a pair of positioning boss portions 35 and 36 are provided on the right end portion 26 and the left end portion 27 of the HM 8, respectively. Further, in the HM holder 5, as shown in FIG. 6, pressing portions 61 and 62 are provided on the right side wall portion 51 and the left side wall portion 52. The positioning boss part 35 is inserted into the hole of the pressing part 61, and the positioning boss part 36 is inserted into the hole of the pressing part 62. Therefore, in this embodiment, the HM 8 can be easily positioned with respect to the HM holder 5.

  Further, in the present embodiment, as shown in FIG. 2, the HM holder 5 holds the HM 8 between the right side wall 51 and the left side wall 52 from both sides. Therefore, the HM holder 5 can be held with a reasonable force while positioning the HM 8.

  Further, in this embodiment, as shown in FIG. 5, the diameter of the positioning boss portions 35 and 36 is larger than the thickness of the HM 8, so that it is resistant to external impact. Further, the positioning boss portions 35 and 36 are provided at positions shifted to the opposite side of the reflection surface 41 so as not to protrude from the reflection surface 41 of the HM 8. The influence by the shaping | molding by the side of a reflective surface can be reduced.

  Further, in the present embodiment, as shown in FIG. 5, the positioning boss portions 35, 36 are positions corresponding to the center of the region of the reflective surface 41 where the emitted light is reflected, at the right end portion 26 and the left end portion 27 of the HM 8. Is provided. Thereby, the distortion of the image due to the influence of the deformation of the reflecting surface 41 caused by the stress applied to the positioning boss portions 35 and 36 can be minimized.

  In the present embodiment, the right end portion 26 and the left end portion 27 of the HM 8 are further provided with rotation suppression boss portions 38 and 39 extending in a direction away from the end portions. The HM holder 5 is provided with rotation suppressing portions 64 and 65. Therefore, even if the HM 8 tries to rotate around the positioning boss portions 35 and 36, the rotation suppression boss portions 38 and 39 of the HM 8 abut against the rotation suppression portions 64 and 65 of the HM holder 5. Therefore, it is possible to prevent the HM8 from rotating freely during use.

  Further, in the present embodiment, the housing 2 is further provided with an attachment portion 49 for attaching to the spectacle frame 91. In a state in which the attachment portion 49 is attached to the spectacle frame 91, the opening from which the image light is emitted from the housing 2 is disposed at a position close to the user's eyes, and the housing 2 is away from the user's head. Placed in. Therefore, as shown in FIGS. 1 and 2, the HM 8, the HM holder 5, and the housing 2 are arranged in this order so as to be away from the user's eyes, so that the user's field of view can be widened.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the HMD 1 of the above-described embodiment, the liquid crystal device 101 has been described as an example of the “image light generation unit” of the present invention. However, a device using a two-dimensional display element such as a DMD or an organic EL is also applicable. Furthermore, the present invention can also be applied to a retina scanning projection apparatus (Retinal Scanning Display).

  Moreover, in the said embodiment, as shown in FIG. 1, HM8 is arrange | positioned ahead of a user's left eye, and it arrange | positions in order of the HM holder 5 and the housing | casing 2 toward the right side, and a user's head. It is arranged to keep away from. For example, the HM holder may be disposed above the left eye of the user, and the HM may be disposed in front of the eye from above. In such a case, the housing is arranged so as to be away from the user's head from the HM holder. Even in the case of such a vertically placed type, the same effect as the above embodiment can be obtained.

  In the above embodiment, the type of HMD 1 in which the HM 8 is arranged in front of the user's left eye has been described. However, the present invention is also applicable to a type of HMD in which the HM is arranged in front of the right eye.

  Moreover, in the said embodiment, although HM8 is provided with the rotation suppression boss | hub parts 38 and 39, it is also omissible.

  In the above embodiment, the pressing portion 61 provided on the right side wall 51 and the pressing portion 62 provided on the left side wall 52 may be omitted. In this case, the positioning boss portions 35 and 36 of the HM 8 may be directly inserted into the holding holes 67 and 68 provided in the right side wall portion 51 and the left side wall portion 52.

  In the above-described embodiment, the HMD 1 is described as being attached to the eyeglass-type frame 91. However, for example, the HMD 1 can be attached to a mounting member attached to a head such as a headband, a headphone, or a helmet.

1 Head mounted display (HMD)
2 Housing 5 Half mirror holder (HM holder)
7 Opening 8 Half Mirror (HM)
26 Right end portion 27 Left end portion 35, 36 Positioning boss portion 38, 39 Rotation suppression boss portion 41 Reflecting surface 49 Mounting portion 51 Right side wall portion 52 Left side wall portion 54 Rear bottom portion 54B Stopper portion 64, 65 Anti-rotation portion 67, 68 Holding Hole 101 Liquid crystal device 120 Eyepiece optical system

Claims (8)

In a head-mounted display that is attached to a mounting member that is mounted on a user's head, and that causes the user to recognize an image by entering image light into the user's eye based on image information
An image light generator for generating image light;
An eyepiece optical system for guiding the image light generated by the image light generator in a certain direction;
A housing containing the image light generation unit and the eyepiece optical system;
A reflecting plate made of resin that reflects at least a part of the emitted light of the eyepiece optical system and enters the eye of the user;
A holder that is provided in an opening of the housing from which the emitted light is emitted, sandwiches the reflector by applying a predetermined stress, and is formed of a material that is less rigid than the reflector. Features a head-mounted display. The end portion of the reflector is provided with a first boss portion extending in a direction away from the end portion,
The head-mounted display according to claim 1, wherein the holder is provided with a receiving portion that receives the first boss portion. The reflector includes a pair of end portions facing each other,
The first boss portion is provided at each of the pair of end portions,
The head mounted display according to claim 2, wherein the holder is provided with a pair of receiving portions that respectively receive the pair of first boss portions.   4. The head mount according to claim 3, wherein a first dimension which is a separation distance inside the pair of receiving portions is smaller than a second dimension sandwiched between the pair of end portions of the reflecting plate. display. The diameter of the first boss portion is larger than the thickness of the reflecting plate,
The first boss portion is provided at a position shifted to the opposite side of the reflecting surface so as not to protrude from the reflecting surface of the reflecting plate where the emitted light is reflected in the thickness direction of the end portion. The head mounted display according to claim 2, wherein the head mounted display is provided.   The said 1st boss | hub part is provided in the position corresponding to the center of the area | region where the said emitted light reflects among the said reflective surfaces in the said edge part. Head mounted display. The end portion of the reflector is provided with a second boss portion extending in a direction away from the end portion,
7. The holder according to claim 2, wherein the holder is provided with an abutting portion that abuts on the second boss when the reflector is about to rotate about the first boss. The head mounted display in any one. The housing is provided with an attachment portion for attachment to the frame,
In a state where the attachment portion is attached to the frame,
The said opening part is arrange | positioned in the position close | similar to the said user's eyes, and the said housing | casing is arrange | positioned in the direction away from the said user's head, The one in any one of Claim 1 to 7 characterized by the above-mentioned. Head mounted display.

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