JP6146422B2 - Image display device and head mounted display - Google Patents

Description

  The present invention relates to an image display device used in a state of being mounted on a user's head, and a head mounted display.

  Conventionally, a head mounted display (hereinafter referred to as “HMD”) having a dial for performing various adjustments is known. Patent document 1 discloses HMD provided with the image output part. The image output unit is disposed in front of one of the user's eyes in a state where the HMD is attached to the user. The image output unit includes a case, a diopter adjustment knob, and an electro-optical converter. The diopter adjustment knob is rotatably provided on the surface of the case opposite to the facing surface facing the user. The electro-optical converter is provided inside the case, and forms image light according to an electric signal. The position of the electro-optical converter changes according to the rotation of the diopter adjustment knob. The user adjusts the diopter by rotating the diopter adjustment knob so that the image light formed by the electro-optical converter is in focus.

JP 2004-286833 A

  When the user wearing the HMD operates the diopter adjustment knob with one hand, it is considered that the case is held with a finger. For example, the user makes a thumb contact with the lower surface of the case of the image output unit, and makes a middle finger or an index finger contact with the upper surface. And it is possible that a user rotates a diopter adjustment knob with a middle finger or a ring finger. Since the user cannot see the diopter adjustment knob, the user seems to operate the diopter adjustment knob by groping.

  The positional relationship between the middle finger or ring finger that rotates the diopter adjustment knob and the diopter adjustment knob is the position of the finger that the user holds the case, more specifically, the position of the thumb that touches the case and the index or middle finger with respect to the case. It changes according to. Therefore, depending on the position of the thumb and index finger or middle finger relative to the case, the middle finger or ring finger may not reach the diopter adjustment knob, or the middle finger or ring finger may need to be bent excessively in order to rotate the diopter adjustment knob. is there. In these cases, it may be difficult for the user to perform a search for the diopter adjustment knob.

  An object of the present invention is to provide an image display device and a head-mounted display capable of assisting in holding a housing at an appropriate position so that a user can easily operate various adjustment operation members. It is to be.

An image display device according to a first aspect of the present invention includes an image unit that generates image light, a first optical part that collects the image light generated by the image unit, and light that is collected by the first optical part. An optical system having a second optical portion for deflecting the emitted image light and emitting it to one side in the first direction, and a housing for holding the image unit and the optical system, and orthogonal to the first direction A first surface extending in a second direction and facing one side of the first direction and a third direction orthogonal to the second direction, a second surface facing the other side of the third direction, and the first surface And a third surface that is connected to the second surface and faces the other side in the first direction, and holds the second optical portion of the optical system on one side of the center in the second direction. A housing and a virtual portion provided on the third surface of the housing and extending along the first direction An operation member that can rotate around the image unit, at least one of the image unit and the first optical portion, and the operation member, and the image unit and the first optical unit according to the rotation of the operation member. An adjustment mechanism for relatively moving the portion, wherein the first surface of the housing is in the third direction relative to the one end and the other end in the second direction of the first surface. the one projecting to the side of, in the second direction than the imaginary axis of the operating member have a first apex located on the other side of the second direction, wherein the said virtual axis with said first top first The distance in two directions is 7 mm or more and 15 mm or less .

  An example in which the image display device is held in front of the user's eyes and the user operates the operation member with one hand will be described as an example. In this case, it is conceivable that the user holds the housing by bringing the thumb into contact with the second surface of the housing and bringing the middle finger or index finger into contact with the first surface. And it is possible that a user rotates an operation member with a middle finger or a ring finger. The positional relationship between the middle finger or ring finger that rotates the operation member and the operation member depends on the position at which the user holds the housing, more specifically, the position of the thumb and index finger or middle finger in contact with the housing in the second direction. Change.

Here, the first surface has a first top. For this reason, the user can specify the first top without looking at the first surface when the middle finger or the index finger is brought into contact with the first surface in order to hold the housing. Furthermore, the first top portion is disposed on the other side in the second direction with respect to the virtual axis of the operation member. Accordingly, by adjusting the degree of separation between the first top and the virtual axis, the middle finger or ring finger must be bent excessively in order to rotate the operation member, or the middle finger or ring finger may not reach the operation member. This can be suppressed. As described above, the image display device allows the user to easily operate the operation member by holding the housing at an appropriate position.
In addition, the user must excessively bend the middle finger or ring finger in order to rotate the operation member while holding the housing with the thumb and middle finger or index finger, or the middle finger or ring finger may not reach the operation member. This can be suppressed appropriately.

  In the first aspect, the first top may be located on a line extending along the first direction. In this case, the position of the first top portion in the second direction is fixed at one point and does not spread in the second direction. For this reason, the user can specify in detail the position in the second direction when the middle finger or index finger is brought into contact with the first surface in order to hold the housing.

  1st aspect WHEREIN: The inclination between the said other end in the said 2nd direction of the said 1st top part and the said 1st surface is the said one side in the said 2nd direction of the said 1st top part and the said 1st surface. It may be configured to be steeper than the slope between the two ends. In addition, when a user makes a middle finger or an index finger contact the 1st top part, a middle finger or an index finger bends. The bent middle finger or index finger naturally follows the other side of the first surface in the second direction from the first top. For this reason, when the user holds the casing with the thumb and the middle finger or the index finger, the middle finger or the index finger can be brought along the first surface without a sense of incongruity, so that the casing can be stably held.

  In the first aspect, the second surface of the housing protrudes to the other side in the third direction from the one side end and the other side end in the second direction of the second surface, You may have the 2nd top part located in the said other side of the said 2nd direction rather than the said virtual axis | shaft of the said operation member in a 2nd direction. The user usually holds the casing by bringing the thumb into contact with the second surface of the casing. Here, the second surface has a second top. For this reason, the user can specify the second top portion without looking at the second surface when the thumb is brought into contact with the second surface to hold the housing. Furthermore, the second top portion is disposed on the other side in the second direction with respect to the virtual axis of the operation member. Therefore, by adjusting the degree of separation between the second top and the virtual axis, the middle finger or the ring finger must be bent excessively in order to rotate the operation member, or the middle finger or the ring finger cannot reach the operation member. This can be suppressed. As described above, the image display device allows the user to easily operate the operation member by holding the housing at an appropriate position.

  1st aspect WHEREIN: The position of the said 2nd direction of the said 1st top part and the said 2nd top part may be the same. In this case, the user can hold the casing in a natural state without excessive bending of the middle finger or the index finger to be brought into contact with the first surface and the thumb to be brought into contact with the second surface.

An image display device according to a second aspect of the present invention includes an image unit that generates image light, a first optical portion that condenses the image light generated by the image unit, and light that is collected by the first optical portion. An optical system having a second optical portion for deflecting the emitted image light and emitting it to one side in the first direction, and a housing for holding the image unit and the optical system, and orthogonal to the first direction The first surface on one side of the third direction extending in the second direction and orthogonal to the first direction and the second direction, the second surface on the other side of the third direction, and the first direction A housing that holds the second optical portion of the optical system on one side of the center in the second direction, and is provided on the third surface of the housing. An operation member rotatable about a virtual axis extending along the first direction, and the image unit. An adjustment mechanism that engages at least one of the base and the first optical part and the operation member, and relatively moves the image unit and the first optical part according to the rotation of the operation member; The first surface of the housing includes a first portion extending between the first position and the second position, and a first portion extending between the second position and the third position. At least two portions, the first position is located on the other side of the center in the second direction, the second position is on the one side in the second direction with respect to the first position, The second position between the second position and the virtual axis is located on the one side in the third direction with respect to the first position and on the other side in the second direction with respect to the virtual axis of the operating member. distance is is a 7mm 15mm or more or less, the third position, the second way than the second position A method at a virtual first moving point that is located on the one side of the first and moving on the first surface from the first position through the second position to the third position along the second direction. The direction of the line changes discontinuously when the first movement point passes through the second position.

  An example in which the image display device is held in front of the user's eyes and the user operates the operation member with one hand will be described as an example. In this case, it is conceivable that the user holds the housing by bringing the thumb into contact with the second surface of the housing and bringing the middle finger or index finger into contact with the first surface. And it is possible that a user rotates an operation member with a middle finger or a ring finger. The positional relationship between the middle finger or ring finger that rotates the operation member and the operation member depends on the position at which the user holds the housing, more specifically, the position of the thumb and index finger or middle finger in contact with the housing in the second direction. Change.

Here, the first surface has a first portion and a second portion connected at the second position. The normal on the first surface is discontinuous at the second position. Therefore, the user can specify the second position without looking at the first surface when the middle finger or the index finger is brought into contact with the first surface in order to hold the housing. Furthermore, the second position is disposed on the other side in the second direction with respect to the virtual axis of the operation member. Therefore, by adjusting the degree of separation between the second position and the virtual axis, the middle finger or ring finger must be bent excessively in order to rotate the operation member, or the middle finger or ring finger may not reach the operation member. This can be suppressed. As described above, the image display device allows the user to easily operate the operation member by holding the housing at an appropriate position.
In addition, the user must excessively bend the middle finger or ring finger in order to rotate the operation member while holding the housing with the thumb and middle finger or index finger, or the middle finger or ring finger may not reach the operation member. This can be suppressed appropriately.

  In the second aspect, the third position may be further located on the other side in the third direction than the second position. In this case, the user can easily specify the second position when the middle finger or the index finger is brought into contact with the first surface in order to hold the housing. For this reason, the image display apparatus can allow the user to easily hold the housing at an appropriate position.

  In the second aspect, the second position may be located on a line extending along the first direction. In this case, the position of the second position in the second direction is determined as a single point and does not spread in the second direction. For this reason, the user can specify in detail the position in the second direction when the middle finger or index finger is brought into contact with the first surface in order to hold the housing.

  2nd aspect WHEREIN: The 1st line segment which connected the 1st specific position and the 2nd position where the length in the 2nd direction between the said 2nd positions among the said 1st part and the said 2nd position are connected. The acute angle of the first angle, which is the angle formed with the second direction, is a second specific position in which the length in the second direction between the second portion and the second position is the position of the predetermined length. And the second line segment connecting the second position and the second direction may be larger than the acute angle of the second angle which is an angle formed by the second direction. In this case, the slope of the first part is steeper than the slope of the second part. Note that when the user brings the middle finger or index finger into contact with the second position, the middle finger or index finger bends. The bent middle finger or index finger naturally follows the first portion of the first surface. For this reason, when the user holds the casing with the thumb and the middle finger or the index finger, the middle finger or the index finger can be placed along the first portion without a sense of incongruity, so that the casing can be stably held.

  In the second aspect, the second surface of the casing extends between the fourth position and the fifth position, and a third portion extending between the fourth position and the fifth position. A fourth portion extending at least, wherein the fourth position is located on the other side from the center in the second direction, and the fifth position is the one in the second direction rather than the fourth position. Side, the other side in the third direction with respect to the fourth position, and the other side in the second direction with respect to the virtual axis of the operating member, and the sixth position is the fifth position. Is located on the one side in the second direction, and moves on the second surface from the fourth position through the fifth position to the sixth position along the second direction. The direction of the normal line at the second movement point may change discontinuously when the second movement point passes through the fifth position.The user usually holds the casing by bringing the thumb into contact with the second surface of the casing. Here, the second surface has a third portion and a fourth portion connected at the fifth position. Further, the normal line on the second surface is discontinuous at the fifth position. For this reason, the user can specify the fifth position without looking at the second surface when the thumb is brought into contact with the second surface in order to hold the housing. Furthermore, the fifth position is disposed on the other side in the second direction with respect to the virtual axis of the operation member. Accordingly, by adjusting the degree of separation between the fifth position and the virtual axis, the middle finger or ring finger must be bent excessively in order to rotate the operation member, or the middle finger or ring finger may not reach the operation member. This can be suppressed. As described above, the image display device allows the user to easily operate the operation member by holding the housing at an appropriate position.

  In the second aspect, the second position and the fifth position may be the same in the second direction. In this case, the user can hold the casing in a natural state without excessive bending of the middle finger or the index finger to be brought into contact with the first surface and the thumb to be brought into contact with the second surface.

  In the first aspect and the second aspect, the end portion on the one side in the third direction of the operation member may be disposed on the other side in the third direction with respect to the first surface. When the user holds the housing by bringing the middle finger or index finger into contact with the first surface, the middle finger or the ring finger naturally bends and extends to the other side in the third direction. Therefore, the user can easily operate the operation member by bringing the middle finger or the ring finger into contact with the operation member while holding the housing with the thumb and the middle finger or the index finger.

An image display device according to a third aspect of the present invention extends in a second direction orthogonal to the first direction, and has a first surface on one side of the third direction orthogonal to the first direction and the second direction, The second surface on the other side in the third direction and the third surface on the other side in the first direction, and the image light condensed by the optical system is on one side from the center in the second direction A housing that is ejected toward one side in the first direction, an operation member that is provided on the third surface of the housing and is rotatable about a virtual axis extending along the first direction; An adjustment unit that adjusts the image light according to the rotation of the operation member, wherein the first surface of the housing extends between a first position and a second position. And a second portion extending between the second position and the third position, wherein the first position is a center in the second direction. The second position includes the one side in the second direction relative to the first position, the one side in the third direction relative to the first position, and the operating member. Indicating the position on the other side of the second direction with respect to the virtual axis, a distance in the second direction between the second position and the virtual axis is 7 mm or more and 15 mm or less, and the third position is: The position on the one side in the second direction with respect to the second position is indicated, and the first position is passed along the second direction from the first position to the third position on the first surface. The direction of the normal line at the moving first virtual moving point changes discontinuously when the first moving point passes the second position. According to the 2nd aspect, there can exist an effect similar to Claim 1.

  A head-mounted display according to a fourth aspect of the present invention includes an image display device according to any one of the first to third aspects, a wearing tool configured to be wearable on a head, the wearing tool, and the image display. And a connection mechanism for connecting the apparatus. According to the 4th aspect, there can exist an effect similar to a 1st aspect-a 3rd aspect.

It is the perspective view which looked at HMD1 from the front left diagonal upper side. It is the perspective view which looked at HMD1 from back left slanting lower side. 3 is a right side view of the image display device 11. FIG. 3 is a top view of the image display device 11. FIG. 3 is a front view of the image display device 11. FIG. 3 is a front view of the image display device 11. FIG. 3 is a front view of the image display device 11. FIG. It is the perspective view which looked at the housing | casing 3 from back diagonally upward. 3 is an exploded perspective view of the image display device 11. FIG. It is a figure which shows the state with which the image display apparatus 11 was hold | maintained with the user's left hand 56. FIG.

  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 of the scenery in front of the user's eyes is directly guided to the user's eyes by passing through the half mirror 61A. The projection format of HMD1 is a virtual image projection type. The half mirror 61 </ b> A reflects the light of the image displayed on the liquid crystal panel 72 </ b> B (see FIG. 9, 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 mounting tool 8, a connection tool 9, and an image display device 11. 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 image display device 11 are defined. The upper side, the lower side, the left side, and the right side, the front side, and the rear side of the image display device 11 are, for example, the upper side, the lower side, the left diagonal lower side, the right diagonal upper side, the right diagonal lower side, and Corresponds to the upper left diagonal. The upper side, the lower side, the left side, the right side, the front side, and the rear side of the image display device 11 are 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. Corresponding to

<Mounting tool 8>
As shown in FIGS. 1 and 2, 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 81 and second portions 82 and 83. In the following, for ease of understanding, the mounting tool 8 will be described as being divided into a first part 81 and second parts 82 and 83. However, the mounting tool 8 includes the first part 81 and the second part 82. , 83 are not divided into individual members, but are integral members as a whole.

  The first portion 81 and the second portions 82 and 83 are each curved and elongated plate-like members. The first portion 81 is a portion of the wearing tool 8 that extends in the left-right direction between the position 8A and the position 8B. The first portion 81 is curved in a convex shape on the front side. The position 8A is disposed on the left side of the center 84 in the left-right direction and on the front side of the center 85 in the front-rear direction. The position 8 </ b> B is disposed on the right side of the horizontal center 84 of the wearing tool 8 and on the front side of the front / rear direction center 85. The second portion 82 is a portion of the wearing tool 8 that extends rearward from the position 8A. The second portion 83 is a portion of the wearing tool 8 that extends rearward from the position 8B. The second portions 82 and 83 each extend in a direction in which the rear ends approach each other. The wearing tool 8 is worn on the user's head with the first portion 81 and the second portions 82 and 83 in contact with the frontal, right and left heads of the user, respectively. Is done. In this state, the first portion 81 extends in the left-right direction along the user's forehead. Hereinafter, the side surrounded by the first portion 81 and the second portions 82 and 83 of the mounting tool 8 is referred to as “the inner side of the mounting tool 8”, and the side opposite to the inner side of the mounting tool 8 is referred to as “the mounting tool 8. It is called “outside”.

<Connector 9>
The connection tool 9 is substantially rod-shaped. The connection tool 9 is made of resin or metal. The connection tool 9 extends in the vertical direction as viewed from the front. More specifically, as shown in FIG. 2, the connector 9 extends in a direction in which the lower end portion is inclined forward with respect to the vertical direction. The upper end portion of the connection tool 9 is connected to the mounting tool 8 via the ball joint 21 and the connection member 26. The lower end portion of the connection tool 9 is connected to the image display device 11 via the ball joint 22 and the connection member 27. The image display device 11 is attached to the mounting tool 8 by the connecting tool 9. That is, the connection tool 9, the ball joint 21, the ball joint 22, the connection member 26, and the connection member 27 function as a connection mechanism that connects the mounting tool 8 and the image display device 11. The connection tool 9 holds the image display device 11 at a position separated from the mounting tool 8. The connection tool 9 can place the half mirror 61A of the image display device 11 in front of the left eye of the user in a state where the mounting tool 8 is worn on the user's head.

<Ball joints 21, 22 and connection members 26, 27>
As shown in FIG. 1, the connecting member 26 includes a connecting portion 26 </ b> A and a cylindrical portion 26 </ b> B. The connecting portion 26 </ b> A contacts the inside, the outside, and the upper side of the position 8 </ b> B of the wearing tool 8. 26 A of connection parts connect the connection member 26 with respect to the mounting tool 8 so that attachment or detachment is possible. The column part 26B is a columnar member. The cylindrical portion 26B protrudes to the outside of the mounting tool 8 from a portion of the connecting portion 26A that contacts the outside of the mounting tool 8. The ball joint 21 includes a socket 21A and a ball stud 21B. The socket 21A is connected to the tip of the cylindrical portion 26B. Ball stud 21B has a sphere part (not shown) and a rod-like part protruding from the sphere part. The spherical body portion of the ball stud 21B is rotatably held by the socket 21A. The rod-shaped part of the ball stud 21 </ b> B extends from the sphere part toward the outside of the mounting tool 8. The tip of the rod-shaped part of the ball stud 21 </ b> B is connected to the upper end part of the connection tool 9.

  As shown in FIGS. 1 and 2, the connecting member 27 is a substantially prismatic member extending in the front-rear direction. The front surface of the connection member 27 is connected to a fourth surface 34 (see FIG. 8) of the image display device 11 described later. The upper surface, the lower surface, and the rear surface of the connection member 27 are curved. The ball joint 22 has a socket 22A and a ball stud (not shown). The socket 22 </ b> A is connected to the right surface at the rear end of the connection member 27. A ball stud (not shown) has a sphere part (not shown) and a rod-like part (not shown) protruding from the sphere part. A spherical body portion of a ball stud (not shown) is rotatably held by the socket 22A. A rod-like portion of a ball stud (not shown) extends rightward from the sphere portion. The tip of the ball stud is connected to the lower end of the connection tool 9.

<Image display device 11>
The image display device 11 will be described. The image display device 11 includes a housing 3, an operation member 4, an adjustment mechanism 5 (see FIG. 9), an optical system 6 (see FIG. 9), and an image unit 7 (see FIG. 9).

<Case 3>
The housing 3 has a substantially rectangular parallelepiped shape with curved corners. The housing 3 has a hollow box shape. As shown in FIG. 3, the upper side, the lower side, the front side, the rear side, and the right side of the housing 3 are respectively shown as a first surface 31, a second surface 32, a third surface 33, a fourth surface 34, and a fifth surface. This is called surface 35. The left side of the housing 3 is opened. The first surface 31 and the third surface 33 are curved in the vicinity of the portion connected to each other. The first surface 31 and the third surface 33 are continuously connected without a step. The second surface 32 and the third surface 33 are curved in the vicinity of the portion connected to each other. The second surface 32 and the third surface 33 are continuously connected without a step. Hereinafter, the boundary line 331 between the first surface 31 and the third surface 33 and the boundary line 332 between the second surface 32 and the third surface 33 are defined as follows. A line connecting points corresponding to normals at an angle θ1 with respect to the horizontal plane of 45 degrees among normals at arbitrary points in a portion above the vertical center 3A and in front of the front-rear center 3B of the housing 3 Is defined as a boundary line 331. Of the normals at any point in the portion below the vertical center 3A and the front side of the front-rear center 3B, the point corresponding to the normal at which the angle θ2 with respect to the horizontal plane is 45 degrees is connected. The line is a boundary line 332.

<First surface 31>
As shown in FIG. 4, the first surface 31 has a plate shape that is long in the left-right direction. Both the right end and the left end of the first surface 31 extend from the diagonally left rear toward the diagonally right front. The right end and the left end of the first surface 31 are inclined with respect to the front-rear direction. Hereinafter, the right end position of the first surface 31 is referred to as a “first position 311”. The position of the left end of the first surface 31 is referred to as a “third position 313”. The first surface 31 has a first portion 31A and a second portion 31B. The first portion 31A extends from the first position 311 toward the left side. The second portion 31B extends from the third position 313 toward the right side. As shown in FIG. 5, the first portion 31A and the second portion 31B are each curved upward. The left end of the first portion 31A and the right end of the second portion 31B are connected at the second position 312. As shown in FIG. 4, the second position 312 is disposed on an imaginary line 312 </ b> A that extends along the front-rear direction. For this reason, as shown in FIG. 5, the first surface 31 has a second position 312 as a top portion protruding upward from the right end and the left end of the first surface 31. More specifically, the first surface 31 when viewed from the front side has a peak shape with the second position 312 as a vertex. The first position 311 and the second position 312 are arranged on the right side of the center 3 </ b> C in the left-right direction of the housing 3. The third position 313 is disposed on the left side of the center 3 </ b> C in the left-right direction of the housing 3.

  The first portion 31A and the second portion 31B will be described in detail. As shown in FIG. 6, an arbitrary comparison point P on the second position 312 is defined. Comparison points Q1 to Q5 arranged at equal intervals along the right direction with respect to the comparison point P in the first portion 31A are defined. Comparison points R1 to R8 arranged at equal intervals along the left direction with respect to the comparison point P in the second portion 31B are defined. In this case, the comparison point P is arranged above the comparison points Q1 to Q5 and the comparison points R1 to R8. In other words, the first surface 31 protrudes above the left and right positions at the second position 312.

  Further, the comparison points Q5, Q4, Q3, Q2, Q1, P, R1, R2, R3, R4, R5, R6, R7, R8 from the first position 311 to the third position 313 are passed. The order of normals at each comparison point is compared. In this case, when the position of the selected comparison point changes from the first part 31A to the second part 31B, in other words, when the position of the selected comparison point passes the second position 312, the direction of the normal line Changes from a direction inclined to the right with respect to the upward direction to a direction inclined to the left with respect to the upward direction. Here, the upward direction is, for example, a direction extending from the second surface 32 side toward the first surface 31 side along the left end of the half mirror 61A. That is, when the selected comparison points change in order from Q5 to Q1, the direction of the normal line continuously changes while being inclined to the right with respect to the upward direction. When the comparison points Q1, P, and R1 change in this order, the direction of the normal changes discontinuously from a state inclined to the right side with respect to the upward direction to a state inclined to the left side with respect to the upward direction. To do. Then, the direction of the normal line continuously changes while being tilted to the left with respect to the upward direction when the selected comparison points sequentially change from R1 to R8. In other words, when changing in the order of the comparison points Q1, P, R1, the direction of the normal is relative to the direction extending from the second surface 32 side toward the first surface 31 side along the left end of the half mirror 61A. From the state inclined to the right side, the state changes discontinuously from the second surface 32 side toward the first surface 31 side along the left end of the half mirror 61A.

  Further, as shown in FIG. 7, for the comparison points Q1, R1 having the same distance from the comparison point P, a line segment connecting to the comparison point P and a line segment 3U extending in the left-right direction through the comparison point P Are defined as a first angle θ11 and a second angle θ21, respectively. For the comparison points Q2 and R2 having the same distance from the comparison point P, the acute angles formed by the line segment connecting the comparison point P and the line segment 3U are the first angle θ12 and the second angle θ22, respectively. It is defined as For the comparison points Q3 and R3 having the same distance from the comparison point P, the acute angles formed by the line segment connecting to the comparison point P and the line segment 3U are the first angle θ13 and the second angle θ23, respectively. Define In this case, the first angle θ11 is larger than the second angle θ21. The first angle θ12 is larger than the second angle θ22. The first angle θ13 is larger than the second angle θ23. Although not shown in the drawing, the acute angle of the angle formed by the line segment connecting the comparison point P and the line segment 3U with respect to the comparison points Qn and Rn (n = 1 to 5) having the same distance from the comparison point P. Are defined as a first angle θ1n and a second angle θ2n, respectively, the first angle θ1n is larger than the second angle θ2n. Accordingly, the inclination of the first portion 31A with respect to the left-right direction is steeper than the inclination of the second portion 31B with respect to the left-right direction. The inclinations of the first portion 31A and the second portion 31B can also be understood as the vertical distance between the comparison point P and the predetermined position at a predetermined position that is equidistant from the comparison point P in the left-right direction.

<Second surface 32>
As shown in FIGS. 3 and 5, the shape of the second surface 32 is the first surface 31 and the vertical object. As shown in FIG. 5, the second surface 32 has a fourth position 321, a fifth position 322, a sixth position 323, a third portion 32A, and a fourth portion 32B. The fourth position 321, the fifth position 322, the sixth position 323, the third portion 32 </ b> A, and the fourth portion 32 </ b> B are respectively a first position 311, a second position 312, a third position 313, This corresponds to the first portion 31A and the second portion 31B. The fifth position 322 forms a top portion that projects downward from the right end and the left end of the second surface 32. As shown in FIG. 5, the left and right positions of the second position 312 and the fifth position 322 coincide with each other.

  The third portion 32A extends from the fourth position 321 toward the left side. The fourth portion 32B extends from the sixth position 323 toward the right side. The third portion 32A and the fourth portion 32B each curve downward. The left end of the third portion 32A and the right end of the fourth portion 32B are connected at a fifth position 322. The fifth position 322 is arranged on an imaginary line extending along the front-rear direction. The fourth position 321 and the fifth position 322 are disposed on the right side of the center 3C in the left-right direction of the housing 3. The sixth position 323 is disposed on the left side of the center 3C in the left-right direction of the housing 3.

  The third portion 32A and the fourth portion 32B will be described in detail. As shown in FIG. 6, an arbitrary comparison point S on the fifth position 322 is defined. Comparison points T1 to T5 arranged at equal intervals along the right direction with respect to the comparison point S in the third portion 32A are defined. Comparison points U1 to U8 arranged at equal intervals along the left direction with respect to the comparison point S in the fourth portion 32B are defined. In this case, the comparison point S is arranged below the comparison points T1 to T5 and the comparison points U1 to U8. In other words, the second surface 32 projects downward from any position in the left-right direction at the fifth position 322.

  Further, comparison points T5, T4, T3, T2, T1, S, U1, U2, U3, U4, U5, U6, U7, U8 from the fourth position 321 to the sixth position 323 are passed through. The order of normals at each comparison point is compared. In this case, when the position of the selected comparison point changes from the third portion 32A to the fourth portion 32B, in other words, when the position of the selected comparison point passes the fifth position 322, the direction of the normal line Changes from a direction inclined to the right with respect to the downward direction to a direction inclined to the left with respect to the downward direction. That is, when the selected comparison points change in order from T5 to T1, the direction of the normal line continuously changes while being inclined to the right with respect to the downward direction. When the comparison points T1, S, and U1 change in this order, the direction of the normal changes discontinuously from a state inclined to the right side with respect to the downward direction to a state inclined to the left side with respect to the downward direction. To do. Then, the direction of the normal line continuously changes while being tilted to the left with respect to the downward direction when the selected comparison points sequentially change from U1 to U8.

  Further, regarding the comparison points Tn and Un having the same distance from the comparison point S, acute angles of angles formed by the line segment connecting to the comparison point S and the line segment extending in the left-right direction through the comparison point S are respectively set. When defined as the third angle θ3n and the fourth angle θ4n, the third angle θ3n is larger than the fourth angle θ4n. Accordingly, the inclination of the third portion 32A with respect to the left-right direction is steeper than the inclination of the fourth portion 32B with respect to the left-right direction.

<Third surface 33>
As shown in FIG. 5, the third surface 33 has a plate shape that is long in the left-right direction. As shown in FIG. 3, the third surface 33 is curved forward. As shown in FIG. 5, the left end of the third surface 33 is recessed on the right side from both ends in the up-down direction toward the center 3 </ b> A in the up-down direction to form a substantially arc. A half mirror 61 </ b> A is disposed on the rear side of the portion surrounded by the arc at the left end of the third surface 33. A hole 33A (see FIGS. 8 and 9) penetrating in the front-rear direction is formed in the third surface 33, and a groove 33B (see FIG. 9) is formed around the hole 33A. The center of the hole 33A coincides with the vertical center 3A and is located on the left side of the horizontal center 3C. An operation member 4 to be described later fits into the groove 33B from the front side. The adjusting mechanism 5 (see FIG. 9), which will be described later, enters the hole 33A from the rear side and is connected to the rear surface of the operation member 4. The third surface 33 supports the operation member 4 to be rotatable.

<Fourth surface 34, fifth surface 35>
As shown in FIG. 8, the fourth surface 34 has a plate shape that is long in the left-right direction. The length of the fourth surface 34 in the left-right direction is shorter than the length of each of the first surface 31, the second surface 32, and the third surface 33 in the left-right direction. As shown in FIG. 3, the fourth surface 34 extends in the vertical direction between the rear ends of the first surface 31 and the second surface 32. As shown in FIG. 4, the left and right positions of the left end of the fourth surface 34 and the portion of the left end of the third surface 33 that is recessed to the rightmost side are substantially the same. As shown in FIG. 8, two holes 34 </ b> A are formed at the left end portion of the fourth surface 34. Three holes 34 </ b> B are formed at the right end of the fourth surface 34. The fifth surface 35 extends forward from the right end of the fourth surface 34. A plate-like portion 36 that extends to the right side is provided at the front end of the fifth surface 35. The plate-like portion 36 has two holes 36A arranged in the vertical direction. At the right end of the plate-like portion 36, a concave portion 36B recessed on the left side is formed.

  The housing 3 is formed by combining the first housing 30A and the second housing 30B. The first housing 30 </ b> A has a first surface 31, a second surface 32, and a third surface 33. The second housing 30 </ b> B has a fourth surface 34 and a fifth surface 35. Each of the two holes 34A of the fourth surface 34 passes a screw for attaching the second housing 30B to the first housing 30A. Each of the three holes 34 </ b> B of the fourth surface 34 passes a screw for attaching the connection member 27 (see FIG. 2) to the image display device 11. Each of the two holes 36A of the plate-like portion 36 passes a screw for attaching the second housing 30B to the first housing 30A. As shown in FIGS. 3 and 4, the communication line 37 is inserted into the recess 36 </ b> B of the plate-like portion 36. The communication line 37 passes through the right side of the fifth surface 35 and extends in the front-rear direction. The HMD 1 is connected to an external device (not shown) via a communication line 37. The external device outputs image data to the HMD 1.

<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 37 (see FIGS. 3 and 4). As shown in FIG. 9, 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 first member 71A and a second member 71B. The first member 71A is a hollow, substantially columnar member that extends in the left-right direction and is open on both the left and right sides. The second member 71B is a hollow, substantially quadrangular prism-shaped member that extends in the left-right direction and does not have an upper side surface and is open on both the left and right sides. The first holding member 71 is held at a fixed position with respect to the housing 3.

  The liquid crystal display device 72 includes a glass substrate 72A and a liquid crystal panel 72B. The glass substrate 72 </ b> A and the liquid crystal panel 72 </ b> B are disposed inside the second member 71 </ b> B of the first holding member 71. The liquid crystal panel 72B is a well-known rectangular liquid crystal panel. The liquid crystal panel 72B generates image light by displaying an image on the left surface. The glass substrate 72A is provided on the left side of the liquid crystal panel 72B and protects the display surface of the liquid crystal panel 72B. For example, when the liquid crystal panel 72B is a reflective liquid crystal, 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). A communication line 37 (see FIGS. 3 and 4) 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 37. 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.

<Optical system 6>
The optical system 6 includes a deflection unit 61 and a lens unit 62. The lens unit 62 guides the image light emitted from the image unit 7 to the half mirror 61 </ b> A of the deflection unit 61. The lens unit 62 includes a first member 62A and a second member 62B. The first member 62A is a hollow, substantially columnar member that extends in the left-right direction and has flat surfaces on the top and bottom and is open on both the left and right sides. A plurality of lenses are fixed inside the first member 62A. A first protrusion 621 that protrudes forward is provided on the front surface of the first member 62A. The 1st convex part 621 is cylindrical. The 1st convex part 621 fits in the cam groove of the adjustment mechanism 5 mentioned later. A second convex portion (not shown) that protrudes rearward is provided on the rear surface of the first member 62A. The second convex portion has a rod shape that is long in the left-right direction. The second convex portion fits into a groove 34 </ b> C provided on the front side of the fourth surface 34. The lens unit 62 can move in the left-right direction in accordance with the movement of the second convex portion along the groove 34C.

  The second member 62B is a hollow, substantially columnar member that extends in the left-right direction and has flat portions at the top and bottom and is open on both the left and right sides. The second member 62B is provided on the right side of the first member 62A. The radius of the second member 62B is slightly smaller than the radius of the first member 71A. At least a part of the second member 62B fits inside the first member 71A of the image unit 7. The image light generated by the image unit 7 enters the second member 62B from the right side, passes through the first member 62A and the second member 62B, and exits from the left end of the first member 62A toward the left side. . The plurality of lenses collects image light incident from the right side and emits it to the left side.

  The deflection unit 61 is disposed on the left side of the lens unit 62. The deflection unit 61 includes a half mirror 61A and a holder 61B. As shown in FIG. 1, the half mirror 61A has a rectangular plate shape. The half mirror 61A 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 61A can deflect the image light that passes through the lens unit 62 and enters from the right side to the rear side. The image light deflected by the half mirror 61A passes through the left side of the left end of the fourth surface 34. The image light is emitted from the left end of the housing 3 to the rear side. The user's eyes can visually recognize the virtual image based on the image light emitted backward from the housing 3. Further, the half mirror 61A can transmit light from the outside that is incident from the front side to the rear side. The holder 61B holds the half mirror 61A. The holder 61 </ b> B is sandwiched from above and below by the lower surface of the left end portion of the first surface 31 of the housing 3 and the upper surface of the left end portion of the second surface 32. As shown in FIG. 5, the deflection unit 61 is disposed on the left side of the center 3 </ b> C in the left-right direction of the housing 3.

  In the present invention, instead of the half mirror 61A, a reflecting member capable of totally reflecting image light to the rear side may be used. Further, instead of the half mirror 61A, an optical path deflecting member such as a prism or a diffraction grating may be used.

<Operation member 4>
As shown in FIG. 9, the operation member 4 has a circular plate shape. One surface of the operation member 4 faces the front direction, and the other surface faces the rear direction. A central axis 4A of the operation member 4 extends in the front-rear direction. The operation member 4 is rotatable about the central axis 4A. The side surface 4B of the operation member 4 is provided with a plurality of irregularities extending in the front-rear direction. The unevenness prevents the finger from slipping on the operation member 4 when the user applies a force by bringing the finger into contact with the side surface 4B. The operation member 4 fits into a groove 33 </ b> B provided on the third surface 33 of the housing 3. As shown in FIG. 5, the central axis 4 </ b> A of the operation member 4 is arranged on the left side of the lateral center 3 </ b> C of the housing 3. For this reason, the central axis 4 </ b> A is disposed on the left side of the second position 312 of the first surface 31 of the housing 3 and the fifth position 322 of the second surface 32. As shown in FIG. 6, the length D in the left-right direction between the second position 312 of the first surface 31 and the fifth position 322 of the second surface 32 of the housing 3 and the central axis 4A is 10 mm. The upper end of the operation member 4 is disposed below the boundary line 331 between the first surface 31 and the third surface 33. The lower end of the operation member 4 is disposed above the boundary line 332 between the second surface 32 and the third surface 33. The vertical length between the upper end of the operation member 4 and the boundary line 331 and the vertical length between the lower end of the operation member 4 and the boundary line 332 are set to 6 mm.

<Adjustment mechanism 5>
As shown in FIG. 9, the adjusting mechanism 5 has a circular plate shape. One surface of the adjusting mechanism 5 faces the front direction, and the other surface faces the rear direction. The adjustment mechanism 5 has a protruding portion 5A that protrudes forward from the vicinity of the center of the circle. The protruding portion 5 </ b> A enters the hole 33 </ b> A of the third surface 33 from the rear side and protrudes from the third surface 33 to the front side. The front end portion of the protruding portion 5 </ b> A is fitted in a fitting groove (not shown) on the rear surface of the operation member 4. Thereby, the operation member 4 and the adjusting mechanism 5 sandwich the third surface 33 from both the front and rear sides. The adjustment mechanism 5 can rotate integrally with the operation member 4. The operation member 4 and the adjustment mechanism 5 may be integrally formed.

  A cam groove (not shown) is provided on the rear surface of the adjusting mechanism 5. The cam groove is formed when a part of the rear surface of the adjusting mechanism 5 is recessed in the front side. The cam groove extends in a spiral shape around the circular center of the adjusting mechanism 5. The first convex portion 621 of the lens unit 62 is fitted into the cam groove from behind. When the adjusting mechanism 5 rotates according to the rotation of the operation member 4, the cam groove applies a force to the first convex portion 621 of the lens unit 62. When the operation member 4 rotates clockwise as viewed from the front side, the lens unit 62 moves to the right side. When the operation member 4 rotates counterclockwise when viewed from the front side, the lens unit 62 moves to the left side.

<Overview of operation (focus adjustment)>
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. As shown in FIG. 10, the user brings the thumb 57 of the left hand 56 into contact with the second surface 32 of the housing 3 of the image display device 11, and brings the index finger 58 of the left hand into contact with the first surface 31. More specifically, the user contacts the fifth node 322 of the second surface 32 with the end node portion (for example, the abdominal portion) ahead of the first joint of the thumb 57. The user contacts the second position 312 of the first surface 31 with the end node portion (for example, the abdominal portion) ahead of the first joint of the index finger 58. The user adjusts the position of the image display device 11 so that the half mirror 61A (see FIG. 1) is arranged in front of the left eye.

  Output of image data is started from an external device (not shown). The image data is input to the control board 73B via the communication line 37. Based on the image data, an image is displayed on the liquid crystal panel 72B. The image light of the displayed image passes through the glass substrate 72A and the first 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 a plurality of lenses of the lens unit 62 on the left side and is emitted from the lens unit 62 to the left side. The half mirror 61A reflects the image light emitted from the lens unit 62 to the rear side. The image light is incident on the left eye of the user. In addition, the half mirror 61A transmits external light incident from the front side to the rear side. Thus, the user recognizes the image display device 11 of the HMD 1 by superimposing a virtual image on the front scene.

  The user rotates the operation member 4 by bringing the middle finger 59 of the left hand 56 into contact with the operation member 4. The lens unit 62 moves in the left-right direction according to the rotation of the operation member 4. The distance between the plurality of lenses held by the first member 62 </ b> A of the lens unit 62 and the image unit 7 changes according to the rotation of the operation member 4. When the distance between the plurality of lenses and the image unit 7 changes, the spread angle of the image light that becomes a virtual image visually recognized by the user also changes. Therefore, the user can adjust the focus by rotating the operation member 4.

<Main functions and effects of this embodiment>
The case where the user operates the operation member 4 and performs focus adjustment in a state where the wearing tool 8 is worn by the user and the image display device 11 is held in front of the user's eyes will be described as an example. In this case, as shown in FIG. 10, the user brings the thumb 57 of the left hand 56 into contact with the second surface 32 of the housing 3, and brings the index finger 58 of the left hand 56 into contact with the first surface 31. It is conceivable to hold 3 from above and below. Then, it is conceivable that the user rotates the operation member 4 with the middle finger 59 of the left hand 56. The positional relationship between the middle finger 59 that rotates the operation member 4 and the operation member 4 depends on the position where the user holds the housing 3, more specifically, the positions of the thumb 57 and the index finger 58 that contact the housing 3. Change.

  Here, the first surface 31 includes a first portion 31A and a second portion 31B connected at the second position 312. Further, the normal line on the first surface 31 is discontinuous at the second position 312 (see FIG. 6). Therefore, the user can specify the second position 312 without looking at the first surface 31 when the index finger 58 is brought into contact with the first surface 31 in order to hold the housing 3. Further, the second position 312 is arranged on the right side of the central axis 4A of the operation member 4, and the length D between the second position 312 and the central axis 4A is set to 10 mm (see FIG. 6). In this case, it is possible to prevent the middle finger 59 from being excessively bent in order to rotate the operation member 4 or to prevent the middle finger 59 from reaching the operation member 4. As described above, the image display apparatus 11 allows the user to easily operate the operation member 4 by holding the housing 3 at an appropriate position.

  The reason for setting the length D to 10 mm is as follows. The average length difference between the index finger 58 and the middle finger 59 is about 7 mm. When the operation member 4 is operated with the middle finger 59 in a state where the tip of the index finger 58 is disposed at the second position 312, the tip of the middle finger 59 is likely to be positioned on the left side of the tip of the index finger 58. Therefore, the length D is preferably 7 mm or more in order to prevent the middle finger 59 from being bent excessively. In addition, the average length of the terminal segment ahead of the first joint of the middle finger 59 is about 25 mm. In addition, the user preferably rotates the operation member 4 by bringing the portion (for example, the abdominal portion) moved 10 mm toward the first joint from the tip of the middle finger 59 into contact with the operation member 4. For this reason, the length from the first joint of the middle finger 59 to a position preferable as a contact position with the operation member 4 is 25−10 = 15 mm. When it is assumed that the position of the first joint of the middle finger 59 is arranged on the right side of the second position 312 of the first surface 31, the length D is used to bring the appropriate position of the middle finger 59 into contact with the operation member 4. Is preferably 25−10 = 15 mm or less. In the present embodiment, the length D is set to 10 mm close to the median value among the values of 7 mm or more and 15 mm or less. By setting the length D within this range, the user must appropriately bend the middle finger 59 to rotate the operation member 4 or prevent the middle finger or ring finger from reaching the operation member. it can.

  In the first surface 31, the second position 312 is disposed above the first position 311 and the third position 313. In other words, the first surface 31 protrudes most up at the second position 312. For this reason, when the index finger 58 is brought into contact with the first surface 31 in order to hold the housing 3, the user can easily specify the position that protrudes upward as the second position 312. For this reason, the image display apparatus 11 can make the user easily hold the housing 3 at an appropriate position.

  The second position 312 of the first surface 31 is disposed on a line extending in the front-rear direction. That is, the first surface 31 has a peak shape at the second position 312. In this case, the position of the second position 312 in the left-right direction is fixed at one point and does not spread in the left-right direction. Therefore, the user can specify the position of the index finger 58 in the left-right direction in detail when the index finger 58 is brought into contact with the first surface 31 in order to hold the housing 3.

  When the user holds the casing 3 with the thumb 57 and the index finger 58 sandwiching the casing 3 from above and below, the distal end portion (for example, the abdomen) on the tip side of the first joint of the index finger 58 is moved to the second position 312. Contact. In addition, in the first surface 31 of the housing 3, the first angle θ1n (see FIG. 7) is larger than the second angle θ2n (see FIG. 7). The portion 31B is steeper than the inclination with respect to the left-right direction. In this case, the portion from the distal node portion (for example, the abdominal portion) on the distal end side of the index finger 58 to the first joint naturally follows the first portion 31A of the first surface 31. For this reason, when the user holds the casing 3 with the index finger 58, the index finger 58 can be placed along the first portion 31A without a sense of incongruity, so that the casing 3 can be stably held.

  The middle finger 59 naturally bends and extends to the lower side of the first surface 31 and the front side of the third surface 33 while the user holds the housing 3 with the index finger 58 in contact with the first surface 31. On the other hand, the upper end of the operation member 4 is disposed below the first surface 31. Therefore, the user can easily operate the operation member 4 by bringing the middle finger 59 into contact with the operation member 4 while holding the housing 3 with the thumb and the index finger 58.

  The second surface 32 of the housing 3 has a shape that is vertically symmetrical with the first surface. The fourth position 321, the fifth position 322, the sixth position 323, the third portion 32 </ b> A, and the fourth portion 32 </ b> B are respectively a first position 311, a second position 312, a third position 313, This corresponds to the first portion 31A and the second portion 31B. Therefore, the user can specify the fifth position 322 without looking at the second surface 32 when the thumb 57 is brought into contact with the second surface 32 in order to hold the housing 3. The length D between the fifth position 322 and the central axis 4A is set to 10 mm. For this reason, it is possible to prevent the middle finger 59 from being excessively bent in order to rotate the operation member 4 or the middle finger 59 from reaching the operation member. As described above, the image display device 11 allows the user to easily operate the operation member 4 by holding the housing 3 at appropriate positions on both the upper and lower sides.

  When the user holds the casing 3 between the thumb 57 and the index finger 58 from above and below, the positions of the tips of the thumb 57 and the index finger 58 in the left-right direction substantially coincide. In contrast, the second position 312 of the first surface 31 and the fifth position 322 of the second surface 32 coincide with each other in the left-right direction. Therefore, the user can hold the housing 3 in a natural state without excessively bending either the index finger 58 that makes contact with the first surface 31 or the thumb 57 that makes contact with the second surface 32. Further, the image display device 11 may be used by being horizontally reversed and disposed in front of the user's right eye. In this case, the user can specify the fifth position 322 without looking at the second surface 32 when the index finger 58 is brought into contact with the second surface 32 in order to hold the housing 3. For this reason, even when the image display device 11 is used by being reversed right and left, the user can appropriately operate the operation member 4.

<Modification>
The present invention is not limited to the above embodiment, and various modifications can be made. In the above embodiment, the image display device 11 is held in front of the user's eyes by the wearing tool 8 and the connecting tool 9. The image display device 11 may be held in front of the user's eyes by another mechanism. For example, the image display device 11 may be held in front of the user's eyes by being attached to the user's glasses, hat, headband, or the like. In the above-described embodiment, the housing 3 is held by being sandwiched between the thumb 57 and the index finger 58 from above and below. The operation member 4 was operated by the middle finger 59. On the other hand, the housing 3 may be held by being sandwiched between the thumb 57, the index finger 58, and the middle finger 59 from above and below. In this case, the operation member 4 may be operated with a ring finger. In the above embodiment, the deflection unit 61 is not limited to the case where the deflection unit 61 is held by a portion sandwiched between the first surface 31 and the second surface 32 of the housing 3. For example, the deflection unit 61 may be held on the left side with respect to the housing 3.

  In the above embodiment, the first convex portion 621 of the lens unit 62 is fitted in the cam groove of the adjusting mechanism 5. The adjustment mechanism 5 rotates according to the rotation of the operation member 4, so that the lens unit 62 moves in the left-right direction. On the other hand, the image unit 7 may be provided so as to be movable in the left-right direction. A convex portion protruding forward from the image unit 7 may be fitted in the cam groove of the adjustment mechanism 5. The image unit 7 may move in the left-right direction by rotating the adjusting mechanism 5 according to the rotation of the operation member 4. Further, the relative distance between the lens unit 62 and the image unit 7 may be changed by moving both the lens unit 62 and the image unit 7 in the left-right direction according to the rotation of the operation member 4.

  In the above embodiment, the operation member 4 moves the lens unit 62 in the left-right direction, thereby changing the relative position with the image unit 7 and adjusting the focus. On the other hand, the operation member 4 may be used for purposes other than adjusting the focus. For example, the operation member 4 may function as an operation member that performs various settings of the image display device 11. Specific examples of the various settings include setting of optical characteristics (brightness and contrast) of image light generated by the liquid crystal display device 72 of the image unit 7 and image display size.

  In the above embodiment, the third position 313 of the first surface 31 is disposed below the second position 312. On the other hand, the third position 313 of the first surface 31 may be disposed at the same position in the vertical direction as the second position 312, or may be disposed above the second position 312. The sixth position 323 of the second surface 32 is disposed above the fifth position 322. On the other hand, the sixth position 323 of the second surface 32 may be disposed at the same position as the fifth position 322 in the vertical direction, or may be disposed below the fifth position 322.

  In the said embodiment, the 2nd position 312 of the 1st surface 31 and the 5th position 322 of the 2nd surface 32 were located on the line extended along the front-back direction. The 2nd position 312 and the 5th position 322 may show the vertex of the projection part which protrudes from the circumference towards a specific point. Further, the second position 312 and the fifth position 322 may be positions on a plane having a specific size extending in a direction intersecting with the vertical direction.

  In the above-described embodiment, the inclination of the first surface 31A in the left-right direction of the first portion 31A is steeper than the inclination of the first surface of the second portion 31B in the left-right direction. On the other hand, the inclination with respect to the left-right direction of the 1st part 31A of the 1st surface 31 and the inclination with respect to the left-right direction of the 2nd part 31B of a 1st surface may be the same. Moreover, the inclination with respect to the left-right direction of 31 A of 1st parts of the 1st surface 31 may be gentler than the inclination with respect to the left-right direction of the 2nd part 31B of the 1st surface.

  In the above embodiment, the length D in the left-right direction between the second position 312 and the fifth position 322 and the central axis 4A is 10 mm. The length D is not limited to 10 mm and may be any value between 7 mm and 15 mm. However, 10 mm is more preferable.

  In the above embodiment, the upper end of the operation member 4 is disposed below the boundary line 331 between the first surface 31 and the third surface 33. On the other hand, the upper end of the operation member 4 may be disposed at the same position as the boundary line 331 in the vertical direction. Further, the upper end of the operation member 4 may be disposed above the boundary line 331. In the above embodiment, the lower end of the operation member 4 is disposed above the boundary line 332 between the second surface 32 and the third surface 33. On the other hand, the lower end of the operation member 4 may be disposed at the same position in the vertical direction as the boundary line 332. Further, the lower end of the operation member 4 may be disposed below the boundary line 332.

  In the above embodiment, the second position 312 of the first surface 31 and the fifth position 322 of the second surface 32 may be different in the left-right direction. For example, the horizontal position of the fifth position 322 may be the same as the horizontal center 3 </ b> C of the housing 3. For example, the position of the fifth position 322 in the left-right direction may be the same as the central axis 4 </ b> A of the operation member 4. The second surface 32 may be a plane extending in a direction intersecting the up-down direction. The third surface 32A, the fourth portion 32B, the fourth position 321, the fifth position 322, and the sixth position 323 may not be provided on the second surface 32.

<Others>
The front-rear direction is an example of the “first direction” in the present invention. The rear side is an example of “one side in the first direction” of the present invention. The front side is an example of the “other side in the first direction” of the present invention. The left-right direction is an example of the “second direction” in the present invention. The left side is an example of “one side in the second direction” of the present invention. The right side is an example of “the other side in the second direction” of the present invention. The vertical direction is an example of the “third direction” of the present invention, and the upper side is an example of “one side of the third direction” of the present invention. The lower side is an example of the “other side in the third direction” of the present invention. The lens unit 62 of the optical system 6 is an example of the “first optical portion” in the present invention. The deflection unit 61 of the optical system 6 is an example of the “second optical portion” in the present invention. The second position 312 is an example of the “first top” in the present invention. The fifth position 322 is an example of the “second top” in the present invention. The central axis 4A is an example of the “virtual axis” in the present invention. The comparison points P, Q1 to Q5, and R1 to R8 are examples of the “first movement point” in the present invention. The comparison points S, T1 to T5, and U1 to U8 are examples of the “second movement point” in the present invention.

1: HMD
3: Housing 4: Operation member 4A: Center axis 5: Adjustment mechanism 6: Optical system 7 5: Image unit 11: Image display device 31: First surface 31A: First portion 31B: Second portion 32: Second surface 32A: 3rd part 32B: 4th part 33: 3rd surface 311: 1st position 312: 2nd position 313: 3rd position 321: 4th position 322: 5th position 323: 6th position

Claims (14)

An image unit for generating image light;
A first optical part that condenses the image light generated by the image unit, and a second optical part that deflects the image light condensed by the first optical part and emits it to one side in the first direction. An optical system having
A housing for holding the image unit and the optical system,
A first surface extending in a second direction orthogonal to the first direction and facing one side of the third direction orthogonal to the first direction and the second direction;
A second surface facing the other side of the third direction;
A third surface connected to the first surface and the second surface and facing the other side of the first direction;
A housing that holds the second optical portion of the optical system on one side of the center in the second direction;
An operating member provided on the third surface of the housing and rotatable about a virtual axis extending along the first direction;
An adjusting mechanism that engages with the operation member and at least one of the image unit and the first optical portion, and relatively moves the image unit and the first optical portion according to the rotation of the operation member; ,
With
The first surface of the housing protrudes toward the one side in the third direction from the one end and the other end in the second direction of the first surface, and the operation in the second direction is performed in the second direction. than the imaginary axis of the member have a first apex located on the other side of the second direction,
The image display device , wherein a distance in the second direction between the first top and the virtual axis is 7 mm or more and 15 mm or less .   The image display device according to claim 1, wherein the first top is located on a line extending along the first direction.   The inclination between the first top and the other end of the first surface in the second direction is between the first top and the one end of the first surface in the second direction. The image display device according to claim 1, wherein the image display device is configured to be steeper than the inclination of the image. The second surface of the housing protrudes to the other side of the third direction from the one side end and the other side end in the second direction of the second surface, and in the second direction, A second apex located on the other side of the second direction with respect to the virtual axis of the operating member;
The image display apparatus according to any one of claims 1 to 3, characterized in that. The image display device according to claim 4 , wherein the first top portion and the second top portion have the same position in the second direction. An image unit for generating image light;
A first optical part that condenses the image light generated by the image unit, and a second optical part that deflects the image light condensed by the first optical part and emits it to one side in the first direction. An optical system having
A housing for holding the image unit and the optical system,
A first surface on one side of a third direction extending in a second direction orthogonal to the first direction and orthogonal to the first direction and the second direction;
A second surface on the other side in the third direction, and
A third surface on the other side of the first direction;
A housing that holds the second optical portion of the optical system on one side of the center in the second direction;
An operating member provided on the third surface of the housing and rotatable about a virtual axis extending along the first direction;
An adjusting mechanism that engages with the operation member and at least one of the image unit and the first optical portion, and relatively moves the image unit and the first optical portion according to the rotation of the operation member; ,
With
The first surface of the housing includes a first portion extending between the first position and the second position, and a second portion extending between the second position and the third position. Having at least
The first position is located on the other side of the center in the second direction,
The second position may be the one side in the second direction from the first position, the one side in the third direction from the first position, and the second axis from the virtual axis of the operating member. Located on the other side of the direction,
A distance in the second direction between the second position and the virtual axis is 7 mm or more and 15 mm or less;
The third position is located on the one side in the second direction with respect to the second position,
The direction of the normal line at the virtual first movement point that moves from the first position to the third position along the second direction on the first surface is the first direction. An image display device, wherein the moving point discontinuously changes when passing through the second position. The image display device according to claim 6 , wherein the third position is further located on the other side in the third direction than the second position. The image display device according to claim 7 , wherein the second position is located on a line extending along the first direction. A first line segment connecting the first position and the second position, the length of the first portion being a predetermined length in the second direction between the second position and the second position; The first angle that is an acute angle with the direction is a second specific position in which the length in the second direction between the second portion and the second position is the position of the predetermined length, and the first angle. a second line segment connecting the 2 position, an image display apparatus according to claim 6 to 8, wherein greater than the second angle is an acute angle of an angle between the second direction. The second surface of the housing includes a third portion extending between the fourth position and the fifth position, and a fourth portion extending between the fifth position and the sixth position. Having at least
The fourth position is located on the other side of the center in the second direction,
The fifth position includes the one side in the second direction relative to the fourth position, the other side in the third direction relative to the fourth position, and the second position relative to the virtual axis of the operation member. Located on the other side of the direction,
The sixth position is located on the one side in the second direction with respect to the fifth position,
The direction of the normal line at the virtual second movement point that moves from the fourth position to the sixth position through the fifth position along the second direction on the second surface is the second direction. the image display apparatus according to claim 6 in which the moving point is characterized discontinuously change to when passing through the fifth position 9. The image display apparatus according to claim 1 0, characterized in that the position of the second direction and the fifth position and the second position are the same. End of the third direction of the one side of the operating member, than said first surface, any one of claims 1 to 1 1, characterized in that arranged on the other side of the third direction The image display device described in 1. A first surface on one side of a third direction extending in a second direction orthogonal to the first direction and orthogonal to the first direction and the second direction, a second surface on the other side of the third direction, and The image light having the third surface on the other side in the first direction and condensed by the optical system is emitted from one side to the one side in the first direction from the center in the second direction. A housing to be
An operating member provided on the third surface of the housing and rotatable about a virtual axis extending along the first direction;
An adjustment unit for adjusting the image light according to the rotation of the operation member;
With
The first surface of the housing includes a first portion extending between the first position and the second position, and a second portion extending between the second position and the third position. Having at least
The first position indicates a position on the other side of the center in the second direction,
The second position may be the one side in the second direction from the first position, the one side in the third direction from the first position, and the second axis from the virtual axis of the operating member. Indicating the position of the other side of the direction,
A distance in the second direction between the second position and the virtual axis is 7 mm or more and 15 mm or less;
The third position indicates a position on the one side in the second direction with respect to the second position,
The direction of the normal line at the virtual first movement point that moves from the first position to the third position along the second direction on the first surface is the first direction. An image display device, wherein the moving point discontinuously changes when passing through the second position. And the image display device according to any one of claims 1 to 1 3,
A wearing tool configured to be worn on the head; and
A connection mechanism for connecting the wearing tool and the image display device;
A head-mounted display characterized by comprising:

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