JP4434192B2 - Video display device - Google Patents

Description

  The present invention relates to an image display device that is attached to a user's glasses and used in front of the eyes.

  An image display device that is attached to a user's glasses and provides an image in front of the eyes has been proposed. Such an image display device generally includes a display unit that displays an image, and an eyepiece optical system that guides light from the display unit to the eye and provides a virtual image of the image, and is enlarged by the eyepiece optical system. By providing a virtual image, a reduction in size and weight is achieved so that the virtual image is suitable for attachment to eyeglasses.

  There are several proposals for a configuration for mounting on spectacles. For example, Patent Document 1 discloses a configuration in which a drive unit that drives a display unit is attached to a spectacles vine, and the display unit and the eyepiece optical system are supported by a drive unit by an arm and positioned in front of the eye. Patent Document 2 discloses a configuration in which the display unit and the drive unit are attached to the eyeglass vine, and the eyepiece optical system is fixed to the display unit and positioned in front of the eye.

In Patent Document 3, the entire apparatus is attached from the eyeglass vine to the lens so that the display unit and the eyepiece optical system are positioned in front of the eye. Furthermore, Patent Document 4 shows a configuration in which the eyepiece optical system is located in front of the eyeglass with the lower part of the spectacle lens sandwiched from the front and back, and the display unit is located below the eyepiece.
US Pat. No. 4,753,514 US Pat. No. 6,023,372 JP-A-4-23580 JP 2000-112396 A

  In any video display device, if the optical pupil of the device and the position of the user's eye do not coincide with each other in the left-right direction and the up-down direction, the image observed by the user is missing.

  However, in the configurations of Patent Document 1, Patent Document 2, and Patent Document 3, the positions of the display unit and the eyepiece optical system cannot be moved in the horizontal direction or the vertical direction. Misalignment is likely to occur. In addition, there is a considerable distance from the vine of the glasses to which the apparatus is attached to the position immediately before the eye where the eyepiece optical system is to be placed, and it varies greatly for each user (glasses). For this reason, unless the optical pupil is made very large, it is impossible to make a device suitable for many users.

  However, if the optical pupil is increased, the eyepiece optical system is increased in size, and the entire apparatus is increased in size and weight. This is not preferable for the mode of use attached to the glasses.

  On the other hand, in the configuration of Patent Document 4, it is possible to adjust the position of the optical pupil of the apparatus with respect to the position of the observer's eye. However, the size of spectacle lenses varies, and it is difficult to adjust the eyepiece optical system so that the eyepiece optical system is positioned immediately in front of the eyes for both large and small lenses in the vertical direction. Therefore, it is necessary to enlarge the optical pupil, resulting in an increase in size and weight of the apparatus.

  Further, the conventional video display device does not particularly take into consideration the weight balance. For this reason, the balance of the glasses on which the apparatus is mounted is poor and cannot be used comfortably, and the relative position between the optical pupil and the user's eyes is likely to shift.

  The present invention has been made in view of such problems, and is an image display device attached to eyeglasses, and can easily adjust the position of the user with respect to the eyes. Therefore, it is necessary to make the optical pupil too large. It is an object to provide a device that is easily reduced in size and weight. It is another object of the present invention to provide an image display device that has a good weight balance and that is less likely to cause discomfort to the user even when used for a long time and that has little optical pupil displacement with respect to the user's eyes.

To achieve the above object, the present invention, an image display device attached to the eyeglasses, a display unit for displaying an image, and an ocular optical system to provide a virtual image of the image the display unit displays on a viewer, the A fixing member that fixes the eyepiece optical system, a mounting portion that is fixed to the fixing member and locked to the glasses, and a balancer that is attached to the fixing member and that positions the center of gravity of the entire apparatus behind the nosepiece of the glasses It is set as the structure provided.

  In general, the glasses have a heavy front portion having a lens, and thus are poorly balanced and easily move. If an image display device is attached to this, the eyepiece optical system is located in the vicinity of the front part, and thus the balance tends to be further deteriorated. However, it is possible to prevent the balance from deteriorating or to improve the balance by providing the balancer in the device and positioning the center of gravity of the entire device behind the nose pad.

In the present invention, the video display device attached to the glasses is provided only on one eye side of the user, and is provided only on the one eye side of the user. An eyepiece optical system that provides a virtual image of an image displayed by the unit to one eye of an observer, a fixing member that fixes the eyepiece optical system, a mounting unit that is fixed to the fixing member and locked to glasses, and A balancer is attached to the fixing member and positions the center of gravity in the left-right direction of the device at the approximate center of the device. According to the present invention, in the video display device having the above-described structure, the balancer positions the center of gravity of the entire device behind the nosepiece of the glasses. In the video display device having the above-described configuration, the present invention is characterized in that the balancer is attached to the fixing member via a hinge. In the video display device having the above-described configuration, the balancer is attached to both sides of the fixing member, and is arranged substantially parallel to each other on the left and right temporal portions of the user. According to the present invention, in the video display device having the above-described configuration, the balancer is in contact with the left and right temporal portions of the user and supports the device together with the mounting portion. According to the present invention, in the video display device having the above-described configuration, a cord connected to the display unit is attached to the balancer. According to the present invention, the video display device attached to the glasses includes a display unit that displays the video, an eyepiece optical system that provides a viewer with a virtual image of the video displayed by the display unit, and a mounting unit that is locked to the glasses. And an operation portion that releases a lock of the mounting portion by applying a pinching force from above and below.

  The video display device can be removed from the glasses simply by the user pinching the operation unit from above and below. On the contrary, it is possible to attach to the spectacles only by positioning the mounting portion at the locking portion of the glasses with the operation portion sandwiched therebetween and stopping the operation portion from being sandwiched. Therefore, it is very easy to attach and detach to / from the spectacles, and the user can remove and attach with one hand while wearing the spectacles.

  Still further, in the present invention, an image display device attached to the glasses includes a display unit that displays an image, an eyepiece optical system that includes a volume phase hologram that provides a viewer with a virtual image of the image displayed by the display unit, and a display unit A transparent light guide portion that reflects light from the inside and guides it to the eyepiece optical system, and a mounting portion that is locked to the glasses.

  The volume phase hologram has a function as an eyepiece optical system and can transmit light from the outside world. Therefore, this video display device converts a virtual image of the video displayed by the display unit to an image of the outside world. Can be provided on top of each other. In addition, since the light guide that guides light representing the image from the display unit to the eyepiece optical system is also transparent and can transmit light from the outside world, it is possible to provide an image of the outside world without any defects. Is possible. Furthermore, it is possible to make the eyepiece optical system and the light guide portion thin, and it is a device that is thin and lightweight in the front-rear direction and is suitable for use by being attached to spectacles.

  Each of the above video display devices is preferably configured to have a degree of freedom in the locking position of the mounting portion in the glasses in at least one of the left and right direction and the up and down direction. If it does in this way, it will become possible to adjust the position of the optical pupil with respect to a user's eyes by changing the position which locks a mounting part, and many users can use it without enlarging an optical pupil. It becomes a device.

  As in the present invention, the video display device attached to the glasses includes a display unit that displays the video, an eyepiece optical system that provides a viewer with a virtual image of the video displayed by the display unit, and a mounting unit that is locked to the glasses. And a balancer that positions the center of gravity of the entire apparatus behind the nosepiece of the glasses, the weight balance is improved and the apparatus and the glasses are stable and can be used comfortably. In addition, it is possible to provide an image that is always free from chipping because it is difficult for the observer's eyes to come off the optical pupil of the apparatus.

  Further, as in the present invention, the video display device attached to the glasses is locked to the glasses, a display unit that displays the video, an eyepiece optical system that provides the observer with a virtual image of the video displayed by the display unit, and the glasses. When the mounting portion and the operation portion for releasing the locking of the mounting portion by applying a force sandwiched in the vertical direction, the attachment to and detachment from the glasses becomes extremely easy.

  Furthermore, an image display device attached to the glasses includes, as in the present invention, a display unit that displays an image, and an eyepiece optical system that includes a volume phase hologram that provides a viewer with a virtual image of the image displayed by the display unit. Provided with a transparent light guide part that reflects light from the display part and guides it to the eyepiece optical system, and a mounting part that is locked to the glasses, and provides an image superimposed on the image of the outside world Moreover, it is possible to avoid the occurrence of chipping in the image of the outside world. Furthermore, the device is a thin and light device in the front-rear direction and is suitable for use by being attached to spectacles.

  When each video display device according to the present invention is configured to have a degree of freedom in the locking position of the mounting portion in the eyeglasses in at least one of the horizontal direction and the vertical direction, the user can be changed by changing the position at which the mounting portion is locked. It becomes possible to adjust the position of the optical pupil with respect to the eyes. Therefore, the device can be used by many users without enlarging the optical pupil.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. A video display device 1 according to the first embodiment is shown in FIG. In FIG. 1, (a) is a plan view seen from above, (b) is a front view seen from the front, and (c) is a side view seen from the right side, and is shown partially transparently.

  The video display device 1 includes a pair of left and right transparent plates 10L and 10R, a housing 20, a mounting portion 30, a pair of left and right balancers 40L and 40R, and a cable 50, and is used by being attached to a user's glasses. The FIG. 2 shows the video display device 1 attached to the glasses. When attached to the spectacles 80, the transparent plates 10L and 10R are positioned immediately before the left and right lenses 81L and 81R of the spectacles 80, respectively.

  The housing 20 accommodates an optical system related to the provision of images, and is fixed to the upper edge of the transparent plate 10R. The mounting portion 30 is fixed to the left and right transparent plates 10 </ b> L and 10 </ b> R to connect the two, and is used for attachment to the glasses 80. The video display device 1 is attached to the glasses 80 by locking the mounting portion 30 to the bridge 83.

  The balancers 40L and 40R are fixed to the transparent plates 10L and 10R, respectively, and the entire center of gravity of the video display device 1 is positioned behind the nose pad 86 of the glasses 80 by its weight. The balancers 40L and 40R have hinges 41 near the transparent plates 10L and 10R, and the image display device 1 is in an open state in which the balancers 40L and 40R are substantially perpendicular to the transparent plates 10L and 10R. It is possible to take a closed state that is substantially parallel. The video display device 1 is attached to the glasses 80 in an open state. In the video display device 1 attached to the spectacles 80, the balancers 40L and 40R are in contact with the left and right temporal regions of the user, and are supported by the bridge 83 of the spectacles 80 and the temporal region of the user.

  The cable 50 is connected to the housing 20 and supplies power, a video signal, and a control signal from a control unit (not shown) to the display unit in the housing 20. The cable 50 is attached to the balancer 40R by the holding member 51, and does not sag near the transparent plate 10R or the housing 20.

  FIG. 3 shows an optical system related to the provision of the image of the image display apparatus 1. FIG. 3 shows a cross section of the housing 20 and the transparent plate 10R. The housing 20 accommodates a light emitting diode 71, a convex lens 72, and a transmissive liquid crystal display 73 as a display unit. The light emitting diode 71 emits illumination light for illuminating the liquid crystal display 73. The liquid crystal display 73 displays video on the liquid crystal layer in accordance with a video signal given through a cable, and video light representing the video displayed by modulating the illumination light from the light emitting diode 71 on the liquid crystal layer. To do. The lens 72 guides the illumination light from the light emitting diode 71 to the liquid crystal display 73 as substantially parallel light.

  The upper edge of the transparent plate 10R has a wedge shape in cross section, and the image light from the liquid crystal display 73 passes through the end face and enters the transparent plate 10R. The light that has entered the transparent plate 10R is totally reflected by the two opposing surfaces and travels downward. At the center of the transparent plate 10R, a volume phase hologram 11 is provided as an eyepiece optical system. The hologram 11 is provided at a position facing the right eye of the user so as to be closer to the right eye toward the lower part.

  The light traveling in the transparent plate 10R is diffracted and reflected by the hologram 11, is emitted from the surface of the transparent plate 10R on the user side, passes through the lens 81R of the spectacles 80, and reaches the user's eyes. The hologram 11 is set so as to provide an enlarged virtual image several times the image displayed by the liquid crystal display 73 at a position of several tens of centimeters to several meters from the right eye of the user. The optical pupil P has a size of 6 mm on the left and right and 2 mm on the top and bottom. Thus, by making the optical pupil small in the vertical direction, the transparent plate 10R can be made thin and light.

  The hologram 11 is set so as to hardly affect light having a wavelength different from the wavelength of the image light, and almost all light from the outside world passes through the hologram 11 and reaches the right eye of the user. Therefore, the video display apparatus 1 provides the video displayed on the liquid crystal display 73 so as to overlap the image of the outside world. The transparent plate 10R also transmits light from the outside. Therefore, the image of the outside world provided to the user does not lack. Although light from the outside is refracted when passing through the tilted hologram 11, the refraction can be corrected by the transparent plate 10R that is in close contact with the hologram 11, so that the outside image is not distorted. .

  As the light emitting diode 71, three types that emit light having wavelengths of 630 nm, 520 nm, and 465 nm are used. The liquid crystal display 73 is controlled so as to repeatedly display a red component, a green component, and a blue component of an image in order, and the light emitting diode 71 supplies illumination light corresponding to the color component of the image displayed by the liquid crystal display 73. The light emission is controlled to do so. That is, the video display device 1 provides a color video by time division display.

  FIG. 4 shows the relationship between the wavelength of light and the transmittance and reflectance of the hologram 11. The hologram 11 is set so that the reflectance is maximum (about 100%) at the above three wavelengths, and the width of the wavelength corresponding to the half value of the maximum reflectance is about 20 nm. Therefore, the image light is efficiently diffracted and reflected to provide a bright image, and light from the outside world is transmitted except for light having wavelengths that are very close to the above three wavelengths, thereby providing an image of the outside world with natural colors. . It is also possible to provide a monochromatic image by providing only one light emitting diode 71 that emits light of a single wavelength. Also in that case, the half width of the reflectance of the hologram 11 is preferably about 20 nm.

  The transparent plate 10R for guiding the image light to the hologram 11 by total reflection can have a thickness of about 3 mm or less. Therefore, it is thin and lightweight.

  The size of the optical pupil P may be set to about 6 mm on the left and right and about 2 mm on the top and bottom as described above. If the optical pupil P is this size, the image can be clearly observed through the lens 81R of the normal glasses 80 for correcting myopia and hyperopia. Further, if the optical pupil P is set to such a size, it is possible to provide a variety of users with images that are not missing due to the characteristics of the mounting portion 30 described below.

  The mounting part 30 is shown in FIG. 5A is a front view seen from the front, and FIG. 5B is a side sectional view seen from the right. The mounting portion 30 includes a spring member 31 formed by bending an elastic metal into a coil shape, and a housing 32 that houses a part of the spring member 31 and connects the transparent plates 10L and 10R. Only the front portion 31 a of the spring member 31 is accommodated in the housing 32, and the upper portion 31 c that connects the rear portion 31 b and the front portion 31 a and the rear portion 31 b is located outside the housing 32.

  The surface of the rear portion 31b of the spring member 31 is covered with a resin or rubber 35 having flexibility and a high friction coefficient, and the outer surface of the rear wall 32a of the housing 32 facing the rear portion 31b of the spring member 31 is also made of the same resin or Covered with rubber 36. Further, the lower end of the front portion 31 a of the spring member 31 is fixed in the housing 32. However, the upper part 31c can be moved back and forth by the elasticity of the front part 31a, whereby the distance between the rear part 31b and the housing 32 is variable. The width (length in the left-right direction) of the rear portion 31 b of the spring member 31 is about several millimeters and is smaller than the width of the bridge 83 of the general spectacles 80. Moreover, the height (length in the vertical direction) of the spring member 31 and the housing 32 is about 1 to 2 cm, which is larger than the height of the bridge 83 of the general spectacles 80.

  An operation member 33 is fixed to the upper end of the rear portion 31 b of the spring member 31. The operation member 33 is formed in a plate shape with a rigid metal or resin, and is inclined so as to rise forward. When the casing 32 is fixed and the operating member 33 is pushed down from above, the rear portion 31b whose upper end is connected to the front portion 31a via the upper portion 31c is inclined in a direction in which the lower end is separated from the rear wall 32a of the casing 32. To do. The user uses this to attach the video display device 1 to the glasses 80.

  This is shown in FIG. As shown by arrows A and B, the user sandwiches the operation member 33 and the housing 32 from above and below, and the lower end of the rear portion 31b of the spring member 31 is largely separated from the rear wall 32a of the housing 32. Then, the bridge 83 of the spectacles 80 is positioned between the rear part 31b and the rear wall 32a to stop the operation member 33 and the casing 32 from being sandwiched. The rear wall 32a of the housing 32 and the rear portion 31b of the spring member 31 sandwich the bridge 83 from the front and rear, and are locked to the bridge 83 by frictional force. This state is shown in FIG. When the video display device 1 is removed from the glasses 80, the user may perform the reverse operation.

  As described above, the video display device 1 can be easily attached to and detached from the glasses 80 and can be performed with two fingers of one hand. Further, the user can attach or remove the video display device 1 while wearing the glasses 80. The video display device 1 can be attached to glasses 80 having different thicknesses (lengths in the front-rear direction) of the bridge 83. This is shown in FIG. In FIG. 8, the thick line represents the spring member 31 when attached to the thin (for example, 1.5 mm) bridge 83, and the thin line represents the spring member 31 when attached to the thick (for example, 4.5 mm) bridge 83.

  As described above, the width of the rear portion 31 b of the spring member 31 is smaller than the width of the bridge 83 of the normal spectacles 80, and the height of the rear portion 31 b is larger than the height of the bridge 83 of the spectacles 80. Accordingly, the locking position of the mounting portion 30 in the bridge 83 has a degree of freedom in both the left-right direction and the up-down direction, and the relative position of the video display device 1 with respect to the glasses 80 can be adjusted within the range of this degree of freedom. . Although the width of the left and right eyes varies depending on the user, the distance from the bridge 80 to the user's eyes is about half the width of the left and right eyes and does not vary greatly depending on the user. The optical pupil P of the video display device 1 can be positioned immediately before.

  Further, regardless of the thickness of the bridge 83 of the spectacles 80, the distance between the lens 81R of the spectacles 80 and the transparent plate 10R is substantially constant, and therefore the position of the optical pupil P in the front-rear direction is also substantially constant. In the video display device 1, the size of the optical pupil P can be set to 6 mm on the left and right and 2 mm on the top and bottom depending on these conditions, and the size of the eyepiece optical system that increases the size and weight of the device can be avoided. It is done.

  The weight balance of the video display device 1 will be described with reference to FIG. 9A is a plan view, and FIG. 9B is a side view. M is the weight of the video display device 1 excluding the cable 50, G is its center of gravity, Ma is the weight of all parts excluding the balancers 40L and 40R and the cable 50, Ga is its center of gravity, Mb is the weight of the balancers 40L and 40R only, Gb represents the center of gravity. Further, La is the distance in the front-rear direction between the center of gravity Ga and the center of gravity G, Lb is the distance in the front-rear direction between the center of gravity Gb and the center of gravity G, la is the distance in the left-right direction between the center of gravity Ga and the center of gravity G, and lb is the center of gravity Gb and the center of gravity. This represents the distance in the left-right direction from G.

Regarding the front-rear direction, Expressions 1 and 2 are established, and Expression 3 is obtained from Expression 2.
M = Ma + Mb Equation 1
Ma × La = Mb × Lb Equation 2
La = Lb × Mb / Ma Equation 3

  From Equation 3, it can be seen that if Lb is increased and Mb is increased, the entire center of gravity G moves backward. The balancers 40L and 40R perform this function. In the video display device 1, the entire center of gravity G is positioned behind the nose pad 86 for the glasses in the front-rear direction. This prevents the center of gravity when the image display device 1 is attached from moving forward than the center of gravity of the glasses 80 alone, thereby stabilizing the whole. Note that increasing the weight Mb of the balancers 40L and 40R increases the total weight M, so it is preferable to lengthen the balancers 40L and 40R to increase Lb.

In the left-right direction, Expression 4 and Expression 5 are established, and Expression 6 is obtained from Expression 5.
M = Ma + Mb Equation 4
Ma × la = Mb × lb (Formula 5)
la = lb × Mb / Ma (Formula 6)

  From Equation 6, it can be seen that if lb is increased and Mb is increased, the entire center of gravity G moves to the left. The balancers 40L and 40R also have this function. In the video display device 1, the entire center of gravity G is set near the center in the left-right direction, although the housing 20 is provided only on the right transparent plate 10R. is doing. This maintains a good balance in the left-right direction, further increasing the overall stability. In addition, it is possible to avoid the weight from being applied to one of the user's ears and the temporal region (right side in this case) and to use it comfortably. The left and right balancers 40L and 40R can have the same weight. However, if the left balancer 40L is heavier than the right balancer 40, the center of gravity Gb can be adjusted from the center of the left and right while keeping the sum of the weights of both the balancers 40L constant. It can be separated (increase lb), which is preferable.

  Here, since the cable 50 can be supported by the right ear, the weight of the cable 50 is not considered. However, when the cable 50 is heavy, the weight and length of the balancers 40L and 40R are also taken into consideration. It is good to set it. In addition, when video signals and control signals are supplied wirelessly, it is naturally unnecessary to consider the weight of the cable.

  A video display device 2 of the second embodiment is shown in FIG. 10A is a plan view seen from above, FIG. 10B is a front view seen from the front, and FIG. 10C is a side view seen from the right. The video display device 2 is the same as the video display device 1 except that the left transparent plate 10L and the balancers 40L and 40R are omitted. The transparent plate 10R has the second mounting portion 60 instead of the right balancer 40R. Is fixed. The configuration of the mounting portion 30 for attaching to the bridge of the spectacles 80 and the optical system for providing an image are as described above.

  The mounting portion 60 is locked to the armor 87R (see FIG. 2) of the glasses 80. The mounting part 60 is supported by the fixing member 61 fixed to the transparent plate 10R, and is supported in the left-right direction (x direction in FIG. 10A) and the front-rear direction (y direction in FIG. 10C). The movable member 62 is movable. The moving member 62 has a U-shaped cross section and is locked in such a manner that the armor 87R of the spectacles 80 is sandwiched from the front and rear.

  The fixed member 61 and the moving member 62 are engaged by a frictional force, and the relative position between them is not changed by a slight force. However, when a slightly large force is applied, the moving member 62 can be displaced in the left-right direction and the front-rear direction with respect to the fixed member 61. The size of the lenses 81L and 81R varies greatly depending on the spectacles 80, and the height (the length in the vertical direction) and the position in the front-rear direction of the yoloi 87L and 87R are different. Fits spectacles 80.

  In the video display device 2, although the balancers 40 </ b> L and 40 </ b> R that sandwich the user's head from both sides do not exist, the mounting portion 30 is locked to the bridge 83 and the mounting portion 60 is locked to the armor 87, thereby Can be attached stably. Moreover, since the mounting portion 60 can move in both the left and right directions and the mounting portion 30 can also move in the left and right directions and the vertical direction as described above, the position of the optical pupil P can be easily adjusted.

  A video display device 3 according to the third embodiment is shown in FIG. 11A is a plan view seen from above, FIG. 11B is a front view seen from the front, and FIG. 11C is a side view seen from the right. The video display device 3 includes one transparent plate 10 corresponding to the two transparent plates 10L and 10R of the video display device 1 of the first embodiment, and omits the balancers 40L and 40R. The transparent plate 10 is a curved surface. Further, the mounting portion 30 to be locked to the bridge 83 is fixed to the left and right center of the transparent plate 10.

  A video display device 4 of the fourth embodiment is shown in FIG. 12A is a plan view seen from above, FIG. 12B is a front view seen from the front, and FIG. 12C is a side view seen from the right. The video display device 4 is obtained by modifying the video display device 3 and fixing mounting portions 30 </ b> L and 30 </ b> R having the same configuration as the mounting portion 30 to the left and right ends of the transparent plate 10. The mounting portions 30L and 30R are locked to the left and right armatures 87L and 87R of the glasses 80.

  In the video display device 4, the position of the optical pupil P can be adjusted in the same manner as the video display device 1 of the first embodiment by the locking positions of the mounting portions 30L and 30R. Moreover, since it is attached to both ends of the spectacles 80, the stability is high and rotation or the like is reliably prevented.

  FIG. 13 shows a video display device 5 according to the fifth embodiment. 13A is a plan view seen from above, and FIG. 13B is a front view seen from the front. The video display device 5 is modified from the video display device 1 of the first embodiment, omits one transparent plate 10L, and is equipped with a balancer 40L by an arm 52 having a shape along the upper edge of the lens 81L of the spectacles 80. It is connected to the part 30.

  FIG. 14 shows a video display device 6 according to the sixth embodiment. 14A is a plan view seen from above, and FIG. 14B is a front view seen from the front. The video display device 6 modifies the video display device 1 of the first embodiment, and includes a configuration for providing video for each of the left and right transparent plates 10L and 10R, and provides video to both eyes. It is what I did. That is, the video display device 6 is provided at the center of each of the two casings 20L and 20R and the left and right transparent plates 10L and 10R that accommodate the light emitting diode 71, the lens 72, and the liquid crystal display 73, and an eyepiece optical system. The two holograms 11L and 11R and the two cables 50L and 50R are included.

  The configuration of the mounting portion 30 that is locked to the bridge 83 of the spectacles 80 is as described above. In the video display device 6, the position of the optical pupil P cannot be adjusted in the left-right direction. However, since the difference between users in the distance from the bridge 83 to the eyes is small, the optical display is more optical than the first video display device 1. By making the pupil P slightly larger in the left-right direction, the apparatus can be adapted to many users. Further, in the vertical direction, it is possible to adjust the position of the optical pupil P at the locking position of the mounting portions 30L and 30R. Therefore, it is not necessary to increase the optical pupil P. Since the volume phase holograms 11L and 11R are used as the eyepiece optical system, it is easy to make the optical pupil P non-circular.

The top view (a), front view (b), and side view (c) of the video display apparatus of 1st Embodiment. The top view which shows the state which attached the video display apparatus of 1st Embodiment to spectacles. The longitudinal cross-sectional view of the housing | casing and transparent plate of the video display apparatus of 1st Embodiment. The figure which shows typically the transmittance | permeability of the hologram which comprises the eyepiece optical system of 1st Embodiment, and the relationship between a reflectance, and a wavelength. The front view (a) of the mounting part of the video display apparatus of 1st Embodiment, and side sectional drawing (b). The longitudinal cross-sectional view of the mounting part at the time of attaching the video display apparatus of 1st Embodiment to spectacles. The longitudinal cross-sectional view of a mounting part when the video display apparatus of 1st Embodiment is attached to spectacles. The longitudinal cross-sectional view of a mounting part when attaching the video display apparatus of 1st Embodiment to the spectacles from which the thickness of a bridge differs. The top view (a) which shows the whole image display apparatus of 1st Embodiment, and a one part gravity center, and a side view (b). The top view (a), front view (b), and side view (c) of the video display apparatus of 2nd Embodiment. The top view (a), front view (b), and side view (c) of the video display apparatus of 3rd Embodiment. The top view (a), front view (b), and side view (c) of the video display apparatus of 4th Embodiment. The top view (a) of the video display apparatus of 5th Embodiment, and a front view (b). The top view (a) of the video display apparatus of 6th Embodiment, and a front view (b).

Explanation of symbols

1, 2, 3, 4, 5, 6 Video display device 10, 10L, 10R Transparent plate 11, 11L, 11R Volume phase hologram (eyepiece optical system)
20, 20L, 20R Housing 30, 30L, 30R Mounting portion 31 Spring member 31a Spring member front portion 31b Spring member rear portion 31c Spring member upper portion 32 Housing 32a Housing rear wall 33 Operating members 40L, 40R Balancers 50, 50L, 50R Cable 60 Mounting portion 61 Fixed member 62 Movable member 71 Light emitting diode 72 Convex lens 73 Transmission type liquid crystal display (display unit)
80 Glasses 81L, 81R Lens 83 Bridge 86 Nose pad 87L, 87R Yoroi

Claims (7)

An image display device attached to the glasses,
A display unit for displaying images;
An eyepiece optical system that provides a viewer with a virtual image of the image displayed by the display unit;
A fixing member for fixing the eyepiece optical system;
A mounting portion fixed to the fixing member and locked to the glasses;
A video display device, comprising: a balancer attached to the fixing member and positioned behind the nose pad of the glasses. An image display device attached to the glasses,
A display unit that is provided only on one eye side of the user and displays an image;
An eyepiece optical system that is provided only on one eye side of the user and provides a virtual image of the image displayed by the display unit to one eye of the observer;
A fixing member for fixing the eyepiece optical system;
A mounting portion fixed to the fixing member and locked to the glasses;
An image display device comprising: a balancer attached to the fixing member and positioning a center of gravity in the left-right direction of the device at a substantially center of the device. The image display apparatus according to claim 2, wherein the balancer positions the center of gravity of the entire apparatus behind the nose pad of the glasses. 4. The video display device according to claim 1, wherein the balancer is attached to the fixing member via a hinge. 5. 5. The image according to claim 1, wherein the balancer is attached to both sides of the fixing member and is arranged substantially parallel to the left and right side heads of the user. Display device. 6. The video display device according to claim 1, wherein the balancer is in contact with a left and right temporal region of a user and supports the device together with the mounting portion. The video display device according to any one of claims 1 to 6, wherein a cord connected to the display unit is attached to the balancer.

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