JP2008134471A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attach a display unit where constitution for performing video display is integrated to a case member considering deformation relative to the case member or shock from the outside. <P>SOLUTION: An HMD 101 includes the display unit 301 where constitution for projecting an image to user's right and left eyes is integrated, and the case member 302 pivotally supporting the display unit 301 at the center part of the display unit 301 in a right-and-left direction. Furthermore, the HMD 101 is equipped with elastic members 308 provided between both ends of the display unit 301 in the right-and-left direction and the case member 302. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device.

  2. Description of the Related Art In recent years, a head-mounted image display device has been developed that enables a large screen image to be observed by enlarging an image displayed on an image display element such as a liquid crystal and displaying it in front of an observer.

  FIG. 5 is a diagram illustrating a configuration of a video display device disclosed in Patent Document 1. In FIG.

  A pair of left and right LCDs 3 that are two-dimensional image display elements for displaying images corresponding to the left and right eyes E of the observer M are arranged inside the exterior frame 2 of the apparatus body 1. A pair of backlights 4 that illuminate the LCD 3 are arranged behind the respective LCDs 3, and a pair of prisms 5 that guide the images from the LCD 3 to the both eyes E are arranged below the LCD 3. . The image displayed on the LCD 3 is guided through the respective observation optical axes L in front of the eyes M of the observer M, and is enlarged while passing through the prisms 5 so as to float in front of the eyes E. Respectively.

  Patent Document 2 discloses a method for fixing the main body of the video display device to the exterior. FIG. 6 is a diagram showing a mechanism for attaching the main body to the exterior in the video display device disclosed in Patent Document 2.

  A positioning portion 22b is arranged at a substantially central portion of the main body portion 22, positioning is performed with respect to the exterior portion 14a, and a screw is provided to the hole portion 14c on the exterior portion 14a side at one location 22c at a substantially central position of the main body portion 22. Fix with 42. Further, anti-rotation members 22f and 14f for preventing the main body portion 22 from rotating are provided at both left and right ends of the main body portion 22 and the exterior portion 14a. Fix by fitting.

With such a configuration, even when the exterior portion 14 a is deformed, the force is not transmitted to the main body portion 22, and it is possible to prevent problems such as optical axis misalignment.
Japanese Patent Laid-Open No. 11-174988 Japanese Patent Laid-Open No. 10-293265

  However, in the technique disclosed in Patent Document 2, the detents 14f at both ends of the exterior portion 14a prevent a force applied to the exterior portion 14a from being transmitted to the main body portion 22 in order to prevent a certain amount of clearance. Need to be set. That is, when the anti-rotation member 22f is fitted into the recess of the anti-rotation member 14f, an area of play with respect to the anti-rotation member 22f is required.

  Here, when there is no such play, that is, when the clearance of the detent 14f is narrow, the detent member 22f is fitted into the recess of the detent member 14f without a gap. In this case, it is conceivable that the external force applied to the exterior part 14a is transmitted to the main body part 22 via the anti-rotation member 22f and the main body part 22 is deformed. If the main body 22 is deformed, the left and right optical axes may be displaced. The left and right optical axes are strictly adjusted, and if the image is observed with the optical axis shifted, the observer feels burdensome to observe the image, and in the worst case, physical symptoms such as headaches and seasickness Effects will occur.

  On the other hand, if there is enough play, that is, if the clearance of the anti-rotation member 14f is too wide, a strong force is applied to the anti-rotation members 14f and 22f when an impact force such as vibration or dropping is applied. There is a possibility that problems such as deviation of the left and right optical axes may occur.

  From the above, there is a problem that it is difficult to set both ends to an appropriate clearance, and proper assembly is difficult.

  The present invention has been made in view of the above problems, and in consideration of deformation of the exterior member and impact from the outside, a display unit integrated with a configuration for performing video display is attached to the exterior member. With the goal.

  In order to achieve the object of the present invention, for example, a display device of the present invention comprises the following arrangement.

That is, a display device worn on the user's head,
A display unit integrated with a structure for projecting images to the left and right eyes of the user;
An exterior member of the display device that pivotally supports the display unit at a central portion of the display unit in the left-right direction;
And an elastic member provided between both ends of the display unit in the left and right direction and the exterior member.

  In order to achieve the object of the present invention, for example, a display device of the present invention comprises the following arrangement.

That is, a display device worn on the user's head,
A display unit having a right-eye unit for projecting an image to the right eye of the user, and a left-eye unit for projecting an image to the left eye;
An exterior member of the display device to which the display unit is attached,
In the display unit, a first hole portion is provided between the left-eye unit and the right-eye unit with respect to the attaching direction, and both ends of the display unit are provided with respect to the attaching direction. Each has a second hole,
The exterior member is provided with a first convex portion for loosely penetrating the first hole portion and a second convex portion for penetrating the respective second hole portion. ,
Furthermore, the display device comprises:
An elastic member provided at a root portion of the second convex portion is provided.

  According to the configuration of the present invention, a display unit in which a configuration for displaying an image is integrated can be attached to the exterior member in consideration of deformation of the exterior member and external impact.

  Hereinafter, the present invention will be described in detail according to preferred embodiments with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is a block diagram illustrating a functional configuration of a system for presenting a user with a space (mixed reality space) in which a real space and a virtual space are combined.

  As shown in the figure, the system according to the present embodiment includes an HMD (head mounted display) 101, a position / orientation sensor 107, a measuring unit 108, a computer 100, and a camera 103.

  First, the HMD 101 will be described. As is well known, the HMD 101 is an example of a head-mounted video display device, and is a display device that is mounted on the user's 199 head. Details of the HMD 101 will be described later.

  Next, the position / orientation sensor 107 and the measurement unit 108 will be described. The position / orientation sensor 107 sends a signal corresponding to its own position / orientation to the measurement unit 108 at the subsequent stage. The measuring unit 108 obtains the position and orientation of the position and orientation sensor 107 based on the received signal, and sends data indicating the obtained position and orientation to the computer 100 at the subsequent stage. The technique for obtaining the position / orientation of the position / orientation sensor 107 using the position / orientation sensor 107 and the measurement unit 108 is well-known, and a description thereof will be omitted.

  Next, the camera 103 will be described. The camera 103 captures a moving image in the real space, and the captured image of each frame (real space image) is sent to the computer 100 in the subsequent stage. In general, the camera 103 is provided in the HMD 101, and is attached in the vicinity of the position of the viewpoint (eyes) of the user 199 who wears the HMD 101 on the head. In addition, the camera 103 is attached to the HMD 101 so that its imaging direction substantially matches the line-of-sight direction of the user 199.

  Next, the computer 100 will be described. As shown in the figure, the computer 100 includes a CG generation unit 106, a synthesis unit 105, and a signal processing unit 104.

  The CG generation unit 106 configures the virtual space by arranging each virtual object that configures the virtual space. Then, the viewpoint having the position and orientation indicated by the data received from the measurement unit 108 is arranged in the virtual space, and an image (CG) of the virtual space that can be seen from the arranged viewpoint is generated. The generated image data of the virtual space is sent to the composition unit 105 at the subsequent stage.

  The signal processing unit 104 receives the real space image received from the camera 103, performs various known correction processes, and transmits the image to the subsequent synthesis unit 105.

  The synthesizing unit 105 generates a synthesized image by drawing the virtual space image received from the CG generating unit 106 on the real space image received from the signal processing unit 104. Note that there are various processes for generating a composite image in which a virtual space image is superimposed on a real space image, and the present embodiment is not limited to a specific method.

  The synthesizing unit 105 further converts the generated synthesized image into an appropriate image signal suitable for the HMD 101, and sends the converted image signal to the HMD 101. As a result, a composite image based on this image signal is displayed on the display screen of the HMD 101.

  FIG. 2 is a diagram in which a configuration (video display unit) for displaying an image mounted in the HMD 101 is cut along a cross section parallel to the optical axis.

  In the figure, reference numeral 202 denotes a reflective liquid crystal panel that displays a two-dimensional image by changing the polarization direction of incident linearly polarized light and reflecting it.

  Reference numeral 220 denotes a light source unit as a light source device that illuminates the reflective liquid crystal panel 202.

  The light beam emitted from the light source unit 220 is reflected by the half mirror 213 and enters the reflective liquid crystal panel 202. The reflective liquid crystal panel 202 changes the polarization direction of the incident light according to the displayed video information, and reflects the incident light. The reflected light beam is again transmitted through the half mirror 213 and transmitted through the polarizing plate 205, thereby forming an observable image. The light beam that has passed through the polarizing plate 205 is magnified by the lens 212 and the prism 211 and emitted to the eyeball EP of the observer.

  Next, a configuration for attaching the video display unit provided in the HMD 101 to the exterior member of the HMD 101 will be described.

  FIG. 3 is a diagram illustrating a configuration for attaching the video display unit (video display unit) to the exterior member.

  301, a right-eye unit 301b for projecting an image to the right eye of the user 199 wearing the HMD 101 on the head and a left-eye unit 301a for projecting an image to the left eye are integrated. This is a video display unit. Each of the right-eye unit 301b and the left-eye unit 301a has a configuration as shown in FIG. Of course, the configurations of the right-eye unit 301b and the left-eye unit 301a are not limited to such configurations.

  The essential point in this description is that the video display unit 301 is an integrated configuration for projecting video to both eyes of the user 199 wearing the HMD 101 on the head.

  Further, in the central portion of the video display unit 301 in the left-right direction of the video display unit 301 (the direction indicated by the arrow 399 in the figure), the video display unit 301 is attached to the exterior member 302 (the direction indicated by the arrow 398 in the figure). On the other hand, a hole 303 is provided. Here, the left-right direction of the video display unit 301 is, in other words, a direction along the direction passing through the positions of both eyes of the user 199 who wears the HMD 101 on the head. In this case, the “center portion” may be a position between the right eye unit 301b and the left eye unit 301a. However, when the video display unit 301 is composed of one unit, the video display unit 301 is the central portion in the left-right direction of the video display unit 301.

  Furthermore, the hole part 305 is provided in the both ends in the left-right direction of the video display unit 301 with respect to the mounting direction. The hole 305 is a hole through which a screw is passed in order to fix the video display unit 301 to the exterior member 302 with a screw.

  On the other hand, the exterior member 302 of the HMD 101 is provided with a convex portion (boss) 304 for penetrating the hole portion 303. By passing the convex portion 304 through the hole portion 303, the video display unit 301 is arranged. The projection 304 is pivotally supported. Further, the exterior member 302 is provided with convex portions (screwing bosses) 307 for passing through the respective hole portions 305. A screw groove is provided inside the convex portion 307, and the screw inserted into the hole 305 from the direction indicated by the arrow 398 is configured to close inside the convex portion 307. The convex part 306 is a fixed boss, and its diameter is larger than that of the convex part 307 and the hole part 305.

  In such a configuration, when the video display unit 301 is fixed (attached) to the exterior member 302, first, the projection 304 is passed through the hole 303, and then the video display unit 301 is rotated around the projection 304. Thus, the video display unit 301 is positioned.

  When the positioning is completed, the convex portion 307 is passed through the hole 305, but an elastic member 308 is provided at the base of the convex portion 307. In the drawing, a cylindrical elastic member 308 is passed through the convex portion 307, and then the convex portion 307 is passed through the hole portion 305. As a result, both end portions of the video display unit 301 are fixed to the exterior member 302 via the elastic member 308.

  Finally, a screw is inserted into the hole of the projection 307 through the hole 305 in the direction of the arrow 398 and tightened.

  Here, the elastic member 308 will be described. The elastic member 308 is, for example, a rubber bush, and it is desirable to use a rubber hardness of 30 to 40. If the hardness is less than this, the force applied to the exterior member 302 cannot be absorbed, and the external force may be transmitted to the video display unit 301 as it is. When the rubber hardness is 50 or more, the elastic member 308 can absorb the force applied shockingly, but transmits the force to the video display unit 301 as it is without absorbing the twisting force of the exterior member 302. Therefore, it is desirable that the elastic member 308 having a rubber hardness of about 30 to 40 be used to absorb the external force applied to the exterior member 302.

  As described above, according to the present embodiment, the image display unit 301 is positioned with respect to the exterior member 302 at a substantially central portion, and the both ends are attached to the exterior member 302 via the elastic member 308 having a rubber hardness of about 30 to 40. It was set as the structure fixed with respect to it. As a result, the force applied to the exterior member 302 is not applied to the video display unit 301, and it is possible to prevent problems such as optical axis misalignment.

  Although the position of the hole 303 is not limited to the position shown in FIG. 3, the vertical position is appropriately changed as long as it is the central portion of the video display unit 301 in the horizontal direction of the video display unit 301. You may do it.

  Further, as to how the elastic member 308 is used between the both end portions of the video display unit 301 and the exterior member 302, modified examples can be considered as appropriate.

[Second Embodiment]
In the present embodiment, the video display unit 301 is fixed to the exterior member 302 with a configuration different from that of the first embodiment.

  FIG. 4 is a diagram illustrating a configuration for attaching the video display unit 301 to the exterior member 302. In the figure, the same components as those shown in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.

  This embodiment is different from the first embodiment in the shape of the hole provided in the video display unit 301. As shown in FIG. 4, in the central portion of the video display unit 301 in the left-right direction of the video display unit 301, in the vertical direction (Y-axis direction in the figure) rather than in the left-right direction (X-axis direction in the figure) instead of the hole 303. A long hole 402 is provided in the bottom. The shape of the hole 402 restricts the horizontal shift of the video display unit 301 when the convex portion 304 is passed through the hole 402.

  Furthermore, holes 403 that are longer in the left-right direction than the up-down direction are provided at both ends in the left-right direction of the video display unit 301 instead of the holes 305. The shape of the hole portion 403 regulates the vertical displacement of the video display unit 301 when the convex portion 307 is passed through the hole portion 403.

  With the above configuration, the video display unit 301 can be fixed to the exterior member 302 without any deviation in the horizontal direction or vertical direction by inserting the convex portions 304 and 307 into the hole portions 402 and 403, respectively.

  When the video display unit 301 is fixed to the exterior member 302 with such a configuration, an external force is applied to the exterior member 302 and the exterior member 302 bends around the Y axis shown in FIG. . In such a situation, the shape of the hole 403 is longer in the left-right direction than in the up-down direction as described above, so that the convex portion 306 moves only in the left-right direction. Thereby, the external force of deformation is not transmitted to the video display unit 301. Further, the force that deforms the exterior member 302 is absorbed by the deformation of the elastic member 308.

  Further, when the video display unit 301 is fixed to the exterior member 302 with such a configuration, an external force is applied to the exterior member 302, and the exterior member 302 bends around the X axis shown in FIG. explain. In such a situation, the deformation is only within the range of the seating surface where the video display unit 301 is fixed to the exterior member 302, and the amount of deformation is negligible. For this reason, it is considered that there is no problem even if the deformation around the X axis is transmitted to the video display unit 301 without consideration.

  In addition, although the force around the Z axis in FIG. 4 is also conceivable, since such an HMD 101 has many thin and vertically long structures, the second moment around the Z axis is larger than the other axes, Almost no deformation. Therefore, it is not necessary to consider that the exterior member 302 is deformed around the Z axis, and the exterior member 302 and the video display unit 301 can be positioned by fitting in this direction.

  As described above, according to the present embodiment, horizontal positioning is performed at the approximate center of the video display unit 301, and vertical positioning is performed at both ends. Furthermore, since the vertical positioning of both ends is fixed via an elastic member 308 having a rubber hardness of about 30 to 40, the video display unit 301 can be accurately positioned with respect to the exterior member 302. Furthermore, since the deformation of the exterior member 302 is absorbed by the elastic member 308 and does not reach the video display unit 301, problems such as optical axis misalignment can be prevented.

It is a block diagram which shows the function structure of the system for showing the user the space (mixed reality space) with which the real space and the virtual space were synthesize | combined. It is the figure which cut | disconnected the structure (video display part) mounted in HMD101 for displaying an image | video by the cross section parallel to an optical axis. It is the figure described about the structure for attaching a video display part (video display unit) to an exterior member. FIG. 6 is a diagram illustrating a configuration for attaching a video display unit 301 to an exterior member 302. It is a figure which shows the structure of the video display apparatus currently disclosed by patent document 1. FIG. It is a figure which shows the mechanism in which the main-body part is attached to an exterior part in the video display apparatus currently disclosed by patent document 2. FIG.

Claims (6)

A display device worn on a user's head,
A display unit integrated with a structure for projecting images to the left and right eyes of the user;
An exterior member of the display device that pivotally supports the display unit at a central portion of the display unit in the left-right direction;
A display device comprising: an elastic member provided between both ends of the display unit in the left and right direction and the exterior member. The display unit is
A display unit that performs display based on an external image signal;
The display device according to claim 1, further comprising: an optical system that optically enlarges and projects the image displayed on the display unit. The central portion of the display unit is provided with a first hole in the direction in which the display unit is attached to the exterior member, and the attachment direction is provided at both ends of the display unit in the left and right directions. Are each provided with a second hole,
The exterior member is provided with a first convex portion for loosely penetrating the first hole portion and a second convex portion for penetrating the respective second hole portion. ,
The display device according to claim 1, wherein the elastic member is provided at a base portion of the second convex portion.   The first hole has a shape that is longer in the vertical direction than the left-right direction, and the second hole has a shape that is longer in the left-right direction than the vertical direction. The display device according to claim 3.   The display device according to claim 1, wherein the elastic member is formed of a rubber member having a rubber hardness of 30 to 40. A display device worn on a user's head,
A display unit having a right-eye unit for projecting an image to the right eye of the user, and a left-eye unit for projecting an image to the left eye;
An exterior member of the display device to which the display unit is attached,
In the display unit, a first hole portion is provided between the left-eye unit and the right-eye unit with respect to the attaching direction, and both ends of the display unit are provided with respect to the attaching direction. Each has a second hole,
The exterior member is provided with a first convex portion for loosely penetrating the first hole portion and a second convex portion for penetrating the respective second hole portion. ,
Furthermore, the display device comprises:
A display device comprising: an elastic member provided at a root portion of the second convex portion.

Images