JP2008046562A - Head-mounted display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a small head-mounted display with good image visibility.
An image display unit including an image display element, a lens disposed in front of a user's eyes, a transparent substrate formed integrally with the lens and guiding a light beam from the image display unit to a user's pupil, and a transparent substrate And is arranged substantially perpendicular to the axis connecting the combiner element that overlaps the ambient light and the light beam from the image display unit, the center of the user's pupil, and the center of the combiner element that is placed opposite to the combiner element. A first area corresponding to the outline of the combiner element, provided on the outside of the combiner element, and a dimming unit for dimming the ambient light. The light reduction unit may have a light transmittance in the first region equal to or lower than a light transmittance in the second region of the lens excluding the first region.
[Selection] Figure 1

Description

  The present invention relates to a head-mounted display that includes an image display unit and can be mounted on a user's head.

In recent years, display devices such as a head-mounted display that can be mounted on a user's head have been considered due to the miniaturization of display elements. Among such display devices, a method for improving image visibility has been proposed for a head-mounted display that superimposes external light and a light beam from an image display unit. For example, in the invention of Patent Document 1, a cover that protects the display unit is formed of a material that reduces external light, and the cover is detachable from the display unit.
JP 2001-166703 A

However, in the invention of Patent Document 1, there is a problem that the head-mounted display itself is increased in size and weight due to the cover detachable from the display unit. There is also a problem that it is troublesome to attach and detach the cover at an appropriate timing.
An object of the present invention is to realize a small head-mounted display with good image visibility.

  The head-mounted display according to the present invention is formed integrally with an image display unit including an image display element, a lens arranged in front of the user's eyes, and the lens, and emits a light beam from the image display unit. A transparent substrate that leads to the pupil; a combiner element that is formed in the transparent substrate and superimposes external light and the light beam from the image display unit; and a center of the user's pupil and the combiner element that is placed opposite to the center A dimming portion that is disposed substantially perpendicular to an axis connecting the center, has at least a first region corresponding to the outline of the combiner element, is provided on the outside side of the combiner element, and dimmes the outside light. Prepare.

In addition, Preferably, the said light reduction part may be provided in the said lens or the surface of the said lens.
Preferably, the dimming part may be provided as a member different from the lens.
Preferably, the light reduction unit may have a light transmittance in the first region equal to or less than a light transmittance in a second region of the lens excluding the first region. .

Preferably, in the light reduction section, the light transmittance in the first region and the light transmittance in the second region may gradually change.
Preferably, the dimming unit satisfies T1 / T2 ≧ 0.2, where T1 is a light transmittance in the first region and T2 is a light transmittance in the second region. Also good.

Preferably, the dimming part is formed of a first layer formed by staining in the first region, an outer side of the first layer, and an optical thin film on the entire lens. It may consist of a second layer.
Preferably, the dimming part may be formed by at least one of dyeing and an optical thin film.

Preferably, a second dimming portion provided in a portion including at least a third region corresponding to the contour of the transparent substrate in the second region excluding the first region of the lens is provided. Also good.
Preferably, the second dimming portion may be formed by at least one of dyeing and an optical thin film.

Preferably, the lens may further include a third dimming unit provided on the user side with respect to the combiner element.
Preferably, the third dimming portion may be provided in a portion of the lens excluding at least the first region.
Preferably, the third dimming portion may be formed by at least one of dyeing and an optical thin film.

  According to the present invention, a small head-mounted display with high image visibility can be realized.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1A is an external view of the head-mounted display 1 of the present embodiment. As shown in FIG. 1, the head-mounted display 1 of this embodiment includes a left lens 11L and a right lens 11R in a frame having a structure similar to that of a spectacle frame. A transparent substrate 12 for image display is embedded in the lens portion of the left lens 11L, and the image display unit 13 is fixed to the frame portion (left temple) of the left lens 11L. The transparent substrate 12 is made of an optical material that is transparent to visible light, such as glass or plastic.

When the head-mounted display 1 is mounted on the user's head, the transparent substrate 12 is disposed in front of the observation eye E (the user's left eye), and the image display unit 13 obstructs the view of the observation eye E. Placed in no position.
1B is an internal schematic view of the left lens 11L and the image display unit 13 of the head-mounted display 1 as viewed from the direction of arrow a in FIG. 1A. FIG. It is the figure which looked at 11L and the image display part 13 from the direction of the arrow b of FIG. 1A.

As shown in FIG. 1B, the image display unit 13 includes an image display element 14, a magnifying lens 15, and a reflection mirror 16. Further, the transparent substrate 12 is provided with a combiner element 17 that is disposed in front of the observation eye E and superimposes the display light beam from the image display element 14 and the external light from the external environment.
The image display element 14 includes an illumination optical system that combines an LED and a diffusion plate, and a display element such as a transmissive LCD, a reflective LCD, or an organic EL display. The combiner element 17 is realized by a half mirror, a reflection hologram, a polarization beam splitter, or the like. In either case, the display light flux from the image display element 14 and the external light can be superimposed by semi-transparency, wavelength selective reflection transparency, and polarization selective reflection transparency.

  The display light beam from the image display element 14 is magnified by the magnifying lens 15 and enters the transparent substrate 12 via the reflection mirror 16. The transparent substrate 12 propagates this light beam and superimposes it with external light in the combiner element 17 and guides it to the observation eye E. In a state where the head-mounted display 1 is mounted on the head, the user displays a display image based on the display light beam from the image display element 14 superimposed by the combiner element 17 and an external field image based on external light from the external environment. Can be observed.

At this time, when the balance between the brightness of the external image and the brightness of the display image is poor, the visibility of the display image is deteriorated. Therefore, the head-mounted display 1 of the present embodiment includes a dimming unit on the outside side of the combiner element 17 in the left lens 11L.
2A is an internal schematic view of the left lens 11L and the image display unit 13 of the head-mounted display 1 as seen from the direction of arrow a in FIG. 1A. 2B is a front view of the left lens 11L and the image display unit 13 of the head-mounted display 1 as seen from the arrow b1 in FIG. 2A, and FIG. It is the internal schematic which looked at the lens 11L and the image display part 13 like the arrow b2 of FIG. 2A.

  As shown in FIGS. 2A and 2B, the head-mounted display 1 has a region obtained by projecting the combiner element 17 onto the surface of the left lens 11L on the surface of the left lens 11L (hereinafter referred to as “the combiner element 17”). A dimming unit 20 is provided for dimming the external light of all parts including the corresponding region). The dimming part 20 is formed by dyeing and an optical thin film. Alternatively, the light reduction unit 20 may be formed of a film having a light reduction function or a polarization function. Examples of the optical thin film include a dielectric multilayer film or a metal film (for example, an aluminum film). In addition, you may form the light reduction part 20 combining dyeing | staining and an optical thin film. Further, the light reduction unit 20 may be provided in the left lens 11 </ b> L as long as it is outside the combiner element 17. By providing the dimming unit 20 on the outside or the surface of the left lens 11L from the combiner element 17 in the left lens 11L, the head mounted display 1 can be efficiently downsized. Further, the strength can be improved by integrating the dimming part 20 with the left lens 11L.

  Further, as shown in FIG. 3A, a configuration may be adopted in which a light reducing portion 21 is provided as a member different from the left lens 11L, and the light reducing portion 21 is fixed to the outside of the left lens 11L by connection members 21a and 21b. . Moreover, it is good also as a structure which is equipped with the light reduction part 21 as a member different from the left lens 11L, and adhere | attaches on the external field side surface of the left lens 11L. By providing the dimming part 21 on the outside of the left lens 11L as a member different from the left lens 11L, the manufacturing cost of the dimming part 21 can be expected to be reduced.

The brightness of the external image can be lowered by the above-described dimming unit 20 and the dimming unit 21, and as a result, the visibility of the display image can be improved.
As described above, according to the first embodiment, the image display unit including the image display element, the lens disposed in front of the user's eyes, and the lens are formed integrally, and the light flux from the image display unit is transmitted to the user. A transparent substrate that leads to the eyes, a combiner element that is formed in the transparent substrate and superimposes external light and a light beam from the image display unit, a user's pupil center, and a center of the combiner element that is placed opposite to the center And a dimming unit that is disposed substantially perpendicular to the connecting axis, has at least a first region corresponding to the outline of the combiner element, is provided on the outside side of the combiner element, and dimmes outside light. Accordingly, it is possible to realize a small head-mounted display with high image visibility. In particular, a head-mounted display having a small size, light weight, and simple configuration can be realized as compared with a case where a light-reducing member that can be attached to and detached from the head-mounted display is provided. Moreover, the problem of losing or damaging the dimming member that can be attached to and detached from the head-mounted display as in the prior art can also be avoided.

In addition, the head-mounted display can be reduced in size, weight, and cost as compared with a case where a liquid crystal shutter or the like is incorporated in the head-mounted display to reduce external light. In addition, a small head-mounted display with high image visibility can be realized without consuming electric power unlike a liquid crystal shutter.
<Second Embodiment>
The second embodiment of the present invention will be described below with reference to the drawings.

In the second embodiment, a head-mounted display having an appearance substantially similar to that of the head-mounted display 1 of the first embodiment will be described as an example. Below, illustration and description of the basic part of the head-mounted display of the second embodiment will be omitted, and description will be made using the same reference numerals as those of the first embodiment. In the second embodiment, only parts different from the first embodiment will be described.
FIG. 4A is an internal schematic diagram similar to FIG. 2A of the first embodiment. 4B is a surface view similar to FIG. 2B of the first embodiment, and FIG. 4C is an internal schematic diagram similar to FIG. 2C of the first embodiment.

As shown in FIGS. 4A and 4B, the head-mounted display 1 according to the second embodiment includes a dimming unit 20 on the external surface side surface of the left lens 11L and the left lens 11L, as in the first embodiment. A dimming unit 22 is provided in a region corresponding to the combiner element 17. As shown in FIG. 4A, the dimming unit 22 is provided between the dimming unit 20 and the combiner element 17.
The dimming unit 22 may be provided in the left lens 11L, or may be provided on the surface of the left lens 11L, or may be provided between the dimming unit 20 and the combiner element 17. It may be provided as a member different from 11L.

Moreover, the light reduction part 22 is formed with dyeing | staining and an optical thin film. Alternatively, the light reduction unit 20 may be formed of a film having a light reduction function or a polarization function. Examples of the optical thin film include a dielectric multilayer film or a metal film (for example, an aluminum film). In addition, you may form the light reduction part 20 and the light reduction part 22 combining dyeing | staining and an optical thin film.
For example, when the dimming portion 22 is formed by staining and the dimming portion 20 is formed as a reflective film by an optical thin film, when the user who is using the head-mounted display 1 is viewed from the outside, the entire left lens 11L is It shines like a magic mirror and looks almost uniform in color. Therefore, only a part of the left lens 11L (the dimming portion 22) does not appear dark, so that an external person does not feel uncomfortable. When the combiner is composed of a polarizing beam splitter, the same dimming action can be provided by arranging a linearly polarizing element in the dimming unit 20 without providing the dimming unit 22 specially. By setting the relative rotation angle between the direction of the linearly polarizing element and the direction of the polarizing beam splitter, T1 / T2 described later can be set.

  Next, the light transmittance (hereinafter simply referred to as “transmittance”) of the light reduction unit 20 and the light reduction unit 22 will be described. Generally, when the brightness of the external image is high and the difference from the brightness of the display image is too large, the display image becomes dark and visibility is deteriorated. On the other hand, when the difference between the brightness of the external image and the brightness of the display image is too small, there is no contrast between the external image and the display image, and in this case, the visibility is deteriorated. Therefore, there is an optimum relationship between the transmittances of the light reducing unit 20 and the light reducing unit 22.

  In the left lens 11L, the minimum transmittance in the region corresponding to the combiner element 17 (first region) is T1, and the maximum transmittance in the region excluding the region corresponding to the combiner element 17 (second region) is Let T2. T1 indicates the transmittance when the left lens 11L is dimmed by both the light reducing portion 20 and the light reducing portion 22, and corresponds to the transmittance of the display image portion. T2 indicates the transmittance when the left lens 11L is dimmed only by the light reducing unit 20, and corresponds to the transmittance of the external image portion.

  FIG. 5A shows the ease of viewing an image according to changes in T1 and T2. The horizontal axis of FIG. 5A is T1 / T2. The vertical axis in FIG. 5A is a sensory test of the visibility of the external image and the display image, and is indicated by an evaluation value of 0 (when it is most difficult to see) to 1 (when it is most easy to see). In FIG. 5A, the change regarding the visibility of an external image is shown by a dotted line, and the change regarding the visibility of a display image is shown by a solid line. In FIG. 5A, T1 ≦ T2 and 0 <T1 / T2 ≦ 1.

As shown in FIG. 5A, when T1 / T2 is too small, that is, when the difference in transmittance between the display image portion and the external image portion is too large, the visibility of the external image is remarkably reduced. Therefore, in order to ensure the visibility of both the external image and the display image, it is desirable to satisfy the relationship of T1 / T2 ≧ 0.2.
For example, when used in an environment where outside light is not so strong, such as indoors, when T1 / T2 is about 0.5 and the transmittance of the outside image portion is T2 = 50%, the transmittance of the display image portion is Is preferably T1 = 25%. Further, for example, when used in an environment with strong external light, such as outdoors, when T1 / T2 = about 0.25 and the transmittance of the external image portion is T2 = 5%, the transmittance of the display image portion. Is preferably T1 = about 1%.

  In addition, as shown in FIG. 4, when the transmittance is different between the display image portion and the external image portion, only a part of the left lens 11L (the dimming portion 22) looks dark, and the external person feels uncomfortable. May make you feel. In addition, if the transmittance changes suddenly at the boundary between the display image portion and the external image portion, a blurred image at the boundary portion may occur during observation by the user, and the user may feel uncomfortable.

  Therefore, it is desirable that the transmittance in the display image portion and the transmittance in the external image portion gradually change. For example, as shown in FIG. 5B, it may be gradually changed from the center of the left lens 11L toward the outer periphery, or may be gradually changed in one direction as shown in FIG. 5C. As shown in 5D, it may be gradually changed in two directions. Further, as shown in FIG. 5B, it may be changed in the entire left lens 11L, or may be changed in a specific portion of the left lens 11L as shown in FIGS. 5C and 5D. It should be noted that this change is not stepwise and is preferably a smooth change.

Since the dimming unit 20 and the dimming unit 22 described above can reduce the relative luminance of the external image with respect to the display image, the visibility of the display image can be improved as a result.
As described above, according to the second embodiment, in the light reduction unit, the light transmittance in the first region is equal to or lower than the light transmittance in the second region excluding the first region. Therefore, the visibility of the display image can be improved by reducing the relative luminance of the display image with respect to the external image.

  Further, according to the second embodiment, the light reduction unit gradually changes the light transmittance in the first region and the light transmittance in the second region. Therefore, since only a part of the lens does not appear dark, it does not make an external person feel uncomfortable. In addition, when the transmittance changes suddenly at the boundary between the first region and the second region, a blurred image of the boundary portion may occur during observation by the user. However, according to the present embodiment, since the transmittance gradually changes between the first region and the second region, such a problem can be avoided.

Further, according to the second embodiment, the dimming unit satisfies T1 / T2 ≧ 0.2, where T1 is the light transmittance in the first region and T2 is the light transmittance in the second region. Fulfill. Therefore, the contrast between the external image and the display image can be in an optimum relationship.
In addition, according to the second embodiment, the dimming part is formed of the first layer formed by staining in the first region, the outer side of the first layer, and an optical thin film on the entire lens. Second layer. Therefore, since only a part of the lens does not appear dark, it does not make an external person feel uncomfortable.

In the present embodiment, the example in which the light is reduced by the two layers of the light reduction unit 20 and the light reduction unit 22 is shown. However, the same function as the light reduction unit 20 and the light reduction unit 22 is achieved by the single layer light reduction unit. It may be realized. In this case, what is necessary is just to change the transmittance | permeability locally in the light reduction part of one layer. At this time, as described in the present embodiment, the transmittance may be gradually changed.
<Third Embodiment>
The third embodiment of the present invention will be described below with reference to the drawings. The third embodiment is a modification of the second embodiment. Below, only the parts different from the second embodiment will be described using the same reference numerals as those of the second embodiment.

FIG. 6A is an internal schematic diagram similar to FIG. 4A of the second embodiment. 6B is a surface view similar to FIG. 4B of the second embodiment, and FIG. 6C is an internal schematic diagram similar to FIG. 4C of the second embodiment.
As shown in FIGS. 6A and 6B, the head-mounted display 1 of the third embodiment replaces the dimming unit 22 of the second embodiment with a region corresponding to the transparent substrate 12 including the combiner element 17. The light reduction part 23 which attenuates the external light of the part is provided. The dimming unit 23 is provided between the dimming unit 20 and the combiner element 17 as shown in FIG. 6A.

Note that the dimming unit 23 may be provided in the left lens 11L as long as it is between the dimming unit 20 and the combiner element 17, or may be provided on the surface of the left lens 11L, or the left lens. It may be provided as a member different from 11L.
Moreover, the light reduction part 23 is formed by dyeing | staining and an optical thin film. Alternatively, the light reduction unit 20 may be formed of a film having a light reduction function or a polarization function. Examples of the optical thin film include a dielectric multilayer film or a metal film (for example, an aluminum film). In addition, you may form the light reduction part 23 combining dyeing | staining and an optical thin film.

In addition to the function of the light reduction unit 22 of the second embodiment, the light reduction unit 23 reduces external light mixed into the transparent substrate 12. Therefore, stray light generated by external light mixed in the transparent substrate 12 can be suppressed.
Note that it is desirable that the transmittance of the portion corresponding to the dimming portion 20 and the transmittance of the portion corresponding to the dimming portion 23 change gradually as in the second embodiment. Further, the transmittance of the dimming unit 23 may be set so as to have an optimal relationship with the transmittance of other portions.

As described above, according to the third embodiment, the second dimming is applied to a portion including at least the third region corresponding to the contour of the transparent substrate in the second region excluding the first region of the lens. A part. Therefore, in addition to the effects of the second embodiment, it is possible to prevent external light from entering the transparent substrate in the lens and generating stray light.
<Fourth embodiment>
Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. The fourth embodiment is a modification of the third embodiment. Below, only the parts different from the third embodiment will be described using the same reference numerals as those in the third embodiment.

FIG. 7A is an internal schematic diagram similar to FIG. 6A of the third embodiment. 7B is a surface view similar to FIG. 6B of the third embodiment, and FIG. 7C is an internal schematic diagram similar to FIG. 6C of the third embodiment.
As shown in FIGS. 7A to 7C, the head-mounted display 1 of the fourth embodiment includes areas corresponding to the transparent substrate 12 in addition to the light reduction unit 20 and the light reduction unit 23 of the third embodiment. The dimming unit 24 is provided in a region excluding a portion corresponding to the combiner element 17. As shown in FIG. 7A, the light reduction unit 24 is provided on the user side with respect to the combiner element 17.

The dimming unit 24 may be provided in the left lens 11L as long as it is closer to the user than the combiner element 17, or may be provided on the surface of the left lens 11L, or separate from the left lens 11L. It may be provided as a member.
Moreover, the light reduction part 24 is formed by dyeing | staining and an optical thin film. Alternatively, the light reduction unit 20 may be formed of a film having a light reduction function or a polarization function. Examples of the optical thin film include a dielectric multilayer film or a metal film (for example, an aluminum film). In addition, you may form the light reduction part 24 combining dyeing | staining and an optical thin film.

The light reduction unit 24 reduces light mixed into the transparent substrate 12 from the user side. Therefore, the stray light generated by the light mixed in the transparent substrate 12 can be suppressed.
In addition, what is necessary is just to set the transmittance | permeability of the part corresponding to the light reduction part 24 so that it may have the optimal relationship with the transmittance | permeability of another part.
As described above, according to the fourth embodiment, the lens includes the third dimming unit provided on the user side from the combiner element. Therefore, in addition to the effects of the third embodiment, it is possible to prevent light from entering the transparent substrate in the lens from the user side and generating stray light.

According to the fourth embodiment, the third dimming part is provided in a portion of the lens excluding at least the first region. Therefore, it is possible to prevent stray light from being generated due to light entering the transparent substrate in the lens from the user side while ensuring the visibility of the display image.
In the fourth embodiment, the example corresponding to the transparent substrate 12 includes the dimming unit on both the outside and the user side. However, the dimming unit may be provided only on the user side. .

<Fifth Embodiment>
Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings. The fifth embodiment is a modification of the fourth embodiment. Below, only the parts different from the fourth embodiment will be described using the same reference numerals as in the fourth embodiment.
FIG. 8A is an internal schematic diagram similar to FIG. 7A of the fourth embodiment. 8B is a surface view similar to FIG. 7B of the fourth embodiment, and FIG. 8C is an internal schematic diagram similar to FIG. 7C of the fourth embodiment.

As shown in FIGS. 8A to 8C, the head-mounted display 1 of the fifth embodiment replaces the dimming unit 24 of the fourth embodiment with all regions except the portion corresponding to the combiner element 17. A dimming unit 25 is provided. As shown in FIG. 8A, the light reduction unit 25 is provided closer to the user than the combiner element 17.
The dimming unit 25 may be provided in the left lens 11L as long as it is closer to the user than the combiner element 17, or may be provided on the surface of the left lens 11L, or separate from the left lens 11L. It may be provided as a member.

Moreover, the light reduction part 25 is formed by dyeing | staining and an optical thin film. Alternatively, the light reduction unit 20 may be formed of a film having a light reduction function or a polarization function. Examples of the optical thin film include a dielectric multilayer film or a metal film (for example, an aluminum film). In addition, you may form the light reduction part 25 combining dyeing | staining and an optical thin film.
In addition to the function of the light reduction unit 24 of the fourth embodiment, the light reduction unit 25 reduces light mixed in the left lens 11L from the user side. Therefore, stray light generated by light mixed in the left lens 11L can be suppressed.

In addition, what is necessary is just to set the transmittance | permeability of the part corresponding to the light reduction part 25 so that it may have the optimal relationship with the transmittance | permeability of another part.
As described above, according to the fifth embodiment, the lens includes the third dimming unit provided on the user side from the combiner element. Therefore, in addition to the effects of the fourth embodiment, it is possible to prevent light from entering the lens from the user side and stray light from being generated.

According to the fifth embodiment, the third dimming part is provided in a portion of the lens excluding at least the first region. Therefore, it is possible to prevent stray light from being generated due to light entering the lens from the user side while ensuring the visibility of the display image.
In the first to fifth embodiments described above, the dimming unit (the dimming units 20 to 25) may realize dimming by absorbing light or dimming by reflecting light. You may do it.

  In the first to fifth embodiments described above, the dimming part (the dimming part 20 to 25) is shown as being formed by at least one of dyeing and an optical thin film. It is not limited to examples. For example, the dimming portion may be formed of a material having a dimming function such as a photochromic material. The material provided with the light control function can be used for the light reduction part provided on the outside side of the combiner element, and can also be used for the light reduction part provided on the user side of the combiner element. For example, when the dimming unit 20 and the dimming unit 22 described in the second embodiment are formed of a material having a dimming function, the dimming unit 20 (the entire left lens 11L) is transmitted by dimming. It is preferable to use a material having a small change in rate, and use a material having a large change in transmittance due to dimming for the dimming unit 22 (the part corresponding to the combiner element 17). Furthermore, you may form a light reduction part combining the dyeing | staining and optical thin film, and the raw material provided with the light control function. For example, the dimming part 20 (the entire left lens 11L) described in the second embodiment is formed by at least one of dyeing and an optical thin film, and the dimming part 22 (part corresponding to the combiner element 17) has a dimming function. The effect similar to 2nd Embodiment can be acquired by forming by the provided raw material.

In the first to fifth embodiments described above, the right lens 11R is not particularly described. However, the right lens 11R may be configured to include a dimming unit similarly to the left lens 11L.
In the first to fifth embodiments described above, the head-mounted display 1 having the image display unit 13 only on the left lens 11L has been described as an example. The present invention can be similarly applied to a head-mounted display capable of displaying an image on both eyes.

Further, the techniques described in the first to fifth embodiments may be combined and realized.
In the first to fifth embodiments described above, the description has been given using a glasses-type display as an example of the head-mounted display, but the configuration of the head-mounted display is limited to this configuration example. Not.

It is a figure explaining 1st Embodiment of this invention. It is another figure explaining 1st Embodiment of this invention. It is a figure explaining the modification of 1st Embodiment of this invention. It is a figure explaining 2nd Embodiment of this invention. It is another figure explaining 2nd Embodiment of this invention. It is a figure explaining 3rd Embodiment of this invention. It is a figure explaining 4th Embodiment of this invention. It is a figure explaining 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Head mounted display, 11L ... Left lens, 12 ... Transparent substrate, 13 ... Image display part, 14 ... Image display element, 17 ... Combiner element, 20-25 ... Dimming part

Claims (13)

An image display unit comprising an image display element;
A lens placed in front of the user's eyes;
A transparent substrate that is formed integrally with the lens and guides a light beam from the image display unit to the pupil of the user;
A combiner element that is formed in the transparent substrate and superimposes external light and light flux from the image display unit;
It is arranged substantially perpendicular to an axis connecting the center of the user's pupil and the center of the combiner element placed opposite thereto, and has at least a first region corresponding to the outline of the combiner element, and is more external than the combiner element. And a dimming part for dimming the external light. A head-mounted display comprising: The head-mounted display according to claim 1,
The dimming unit is provided in the lens or on the surface of the lens. The head-mounted display according to claim 1,
The head-mounted display, wherein the dimming unit is provided as a member different from the lens. The head-mounted display according to claim 1,
The dimming unit has a light transmittance in the first region that is less than or equal to a light transmittance in a second region of the lens excluding the first region. Type display. The head-mounted display according to claim 4,
The head-mounted display, wherein the dimming unit gradually changes the light transmittance in the first region and the light transmittance in the second region. The head-mounted display according to claim 4,
The dimming section satisfies T1 / T2 ≧ 0.2, where T1 is a light transmittance in the first region and T2 is a light transmittance in the second region. Part-mounted display. The head-mounted display according to claim 4,
The dimming portion includes a first layer formed by staining in the first region, a second layer formed by an optical thin film on the outside of the first layer, and the entire lens. A head-mounted display characterized by comprising: The head-mounted display according to claim 1,
The head mounted display, wherein the dimming part is formed by at least one of dyeing and an optical thin film. The head-mounted display according to claim 1,
A head having a second dimming portion provided in a portion including at least a third region corresponding to an outline of the transparent substrate in the second region excluding the first region of the lens. Part-mounted display. The head mounted display according to claim 9,
The head-mounted display, wherein the second dimming part is formed by at least one of dyeing and an optical thin film. The head-mounted display according to claim 1,
The head-mounted display, wherein the lens includes a third dimming unit provided on a user side with respect to the combiner element. The head mounted display according to claim 11,
The head-mounted display, wherein the third dimming part is provided in a portion of the lens excluding at least the first region. The head mounted display according to claim 11,
The head-mounted display, wherein the third dimming portion is formed by at least one of dyeing and an optical thin film.

Images