JP2000249967A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a monocular vision type head mounted display made comparatively small in size and light in weight and realizing the adjustment of an eye point with simple constitution by easy operation. SOLUTION: This device is provided with a housing 154 including a white LED 12 being a point light source emitting white light, a condenser lens 14, a scattering plate 17, a liquid crystal display 16 and an image-formation lens 18, and a fixing part 172 movably fixing the housing 154 on spectacles by holding a lens 163 by the elastic force of a spring 167 through elastic members 165 and 169. Thus, the housing is movably fixed on the spectacles by the fixing part 172, so that structure is not complicated and the optical axis of the light emitted from the housing is adjusted to the eye point by the easy operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle-mounted display device generally provided with a light modulation means such as a liquid crystal display, which is generally called a head mounted display.

[0002]

2. Description of the Related Art A goggle type (binocular) head mounted display using a liquid crystal display is disclosed in Japanese Patent Application Laid-Open No. Hei 4-23582. A head-mounted (binocular) head-mounted display using a liquid crystal display is disclosed in Japanese Patent Application Laid-Open No. Hei 5-91582. In addition, a glasses-type (monocular) head-mounted display using a liquid crystal display,
It is disclosed in JP-A-6-102467.

By mounting these head mounted displays, a user can observe a desired image at an arbitrary place such as outdoors.

[0004]

However, the technology described in the above publication has the following problems. First,
The head mounted displays described in the above publications, especially headphone type and goggle type, are all large and heavy, so they are unsuitable for long-time use and inconvenient to carry. Also, in headphone or goggle type head mounted displays, the mechanism for aligning the user's eye point with the emission optical axis of the head mounted display is complicated, and the operation for adjusting the eye point is complicated. It is. Further, in the eyeglass type head mounted display, the liquid crystal display is simply supported by the vine of the eyeglasses, and the eye point adjustment is almost impossible.

Furthermore, in the monocular head mounted display disclosed in the above publication, the left eye and the right eye are separated, and one head mounted display cannot be used for both, which is very inconvenient.

Accordingly, it is a main object of the present invention to provide a display device which is a relatively small and lightweight single-eye type head mounted display.

It is a further object of the present invention to provide a display device which is a monocular type head mounted display capable of adjusting an eye point with a simple configuration and operation.

It is still another object of the present invention to provide a display device which is a monocular head-mounted display which can be used for both the left eye and the right eye.

[0009]

In order to achieve the above object, a display device according to a first aspect of the present invention comprises a light source, a light modulating means for modulating light from the light source, and a light modulating means for connecting the light modulated by the light modulating means. Including an imaging optical system for imaging, comprising a housing configured to guide light modulated to one of the left and right eyeballs of the user, and a fixing portion capable of movably fixing the housing to eyeglasses ing.

According to the first aspect, the housing can be movably fixed to the spectacles by the fixing portion, so that the structure is not complicated, and the optical axis of the light emitted from the housing by a simple operation. It is possible to match the eye point.

[0011] Further, the casing for single-eye observation configured to guide the imaged light to the left or right eyeball of the user can be made relatively small and lightweight.

Further, according to the display device of the second aspect, the fixing portion is configured to sandwich the lens of the glasses from both sides.

According to the second aspect, since the fixing portion is configured to sandwich the lens of the spectacles from both sides, the fixing portion can cope with spectacles without a frame and is fixed for each frame having various shapes. There is no need to change the shape of the part. In addition, the housing can be moved by a simple operation of relaxing fixing by pinching.

Further, in the display device according to the third aspect, the fixing portion includes an elastic member at a portion that comes into contact with the lens.

According to the third aspect, since the portion of the fixed portion that contacts the lens is made of an elastic member, the lens is not damaged by being pinched.

Further, in the display device according to the fourth aspect, the fixing portion is configured such that the housing can be fixed to the glasses with a vine portion of the glasses interposed therebetween.

According to the fourth aspect, the housing is configured to be fixed to the spectacles with the fixing portion sandwiching the vine portion of the glasses therebetween, so that the fixing portion is supported by the vine portion. The case is stabilized, and it is possible to prevent a situation in which the case is displaced from a predetermined position or falls off from the glasses.

Further, the display device according to a fifth aspect of the present invention further comprises an image upside-down inversion control unit for inverting an image by the light modulated by the light modulation unit, and the fixing unit moves the housing up and down. By being turned over, the eyeglasses can be fixed on both left and right sides.

According to the fifth aspect, since the housing has a fixed portion that turns the housing upside down when the left and right fixing positions of the glasses are changed, and an image upside down control means for turning the image upside down, Even if the body is fixed to the left or right side of the glasses, a normal image which is not always inverted upside down can be observed by the image upside down control means. Therefore, the display device can be used for both left and right, and it is not necessary to separately prepare two types of display devices for the left eye and the right eye.

Further, in the display device according to the sixth aspect, the light source includes a point light source that emits white light, and a condensing optical system that condenses light from the point light source.

According to the sixth aspect, since the light source is composed of a point light source that emits white light and a condensing optical system that condenses the light from the point light source, most of the light emitted from the condensing optical system is The light can be given to the imaging optical system via the light modulation means, and the light can be used efficiently.

Further, since the light condensed by the light condensing optical system from the point light source is given to the light modulating means, the emission angle of the light emitted from the light modulating means is relatively small. Therefore, when this light enters the eyeball, the angle of focusing in the eyeball is small, and the depth of focus is deep. Therefore, when the focus deviates from the retina, almost no image blur occurs.

Further, since the point light source emits white light, a full-color image can be displayed by the spatial light modulator.

Further, in the display device according to the present invention, in the image forming optical system, the point light source and the first point located at an arbitrary distance behind the image forming optical system are substantially in a conjugate relationship. And the light modulating means and a second point substantially behind the first point by a distance between the pupil and the retina are disposed so as to have a substantially conjugate relationship. I have.

According to the seventh aspect, since the point light source and the first point (pupil) have a substantially conjugate relationship, most of the light passing through the light modulating means can be guided into the pupil. Therefore, the light emission power of the point light source required to cause a constant light power to enter the pupil may be small, and the power consumed by the point light source can be reduced. Further, since the light modulating means and the second point (retina) have a substantially conjugate relationship, an image by the light modulated by the light modulating means can be observed.

The display device according to claim 8 further includes a scattering plate disposed between the point light source and the light modulation means.

According to the eighth aspect, since the scattering plate is disposed between the point light source and the light modulating means, the spread of the light beam from the light modulating means is larger than that without the scattering plate,
A light beam from an arbitrary point on the light modulating means spreads to a relatively large area near the pupil, for example. Therefore, even when the eyeball deviates from the predetermined position to some extent, the light beam from the light modulating means can be surely guided into the pupil, and luminance unevenness hardly occurs.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of a display device according to a first reference example for explaining the principle of the present invention.
FIG. 2 is a schematic diagram for explaining an optical conjugate relationship in the display device shown in FIG. The display device 1 shown in FIG. 1 includes a white LED 1 that is a point light source that emits white light.
2, a condenser lens 14 having a positive power for condensing light from the white LED 12, a color liquid crystal display (spatial light modulation means) 16 for modulating the light condensed by the condenser lens 14 and selectively transmitting the same. A positive power imaging lens 18 for imaging the light modulated by the liquid crystal display 16 on the retina 24 in the user's eyeball 22; It should be noted that a reflective liquid crystal, a deformable mirror device (DMD), or the like can be used as the spatial light modulator.

In the display device 1, the liquid crystal display 1
The light emitted from the white LED 12 via the virtual stop 20 for explanation enters at one point on 6 at a relatively small stop-down angle θ11. Therefore, the liquid crystal display 16
The emission angle θ12 of the light emitted from the above one point is the aperture angle θ
The angle is relatively small, about the same as 11. Most of the light spread at the emission angle θ12 enters the imaging lens 18, and most of the light passing through the imaging lens 18 enters the pupil surrounded by the iris 26, and passes through the crystalline lens 28 to the retina 24. Reach.

As described above, the white LED 12 emitting white light
And the use of the condenser lens 14, the emission angle θ of the light emitted from one point of the liquid crystal display 16
Not only is 12 relatively small, but also the focus 2 on the retina 24
The focusing angle θ13 of the light focused at 9 is also a relatively small angle corresponding to a partial area of the crystalline lens 28. In other words, in the display device of the present embodiment, the image formed at the focal point 29 on the retina 24 has a large depth of focus, and the image hardly appears blurred even if defocus occurs in the optical axis direction. Therefore, it is possible to allow the user to always observe a clear image even without performing focus adjustment.

Further, according to this embodiment, since the emission angle θ12 of the light emitted from one point on the liquid crystal display 16 is relatively small, the emitted light almost never reaches a user other than the user at a predetermined location. Absent. Therefore, when the liquid crystal display 16 is exposed to the outside,
The image displayed in 6 is hardly seen by anyone other than the user in the optical axis direction, and the confidentiality of the displayed image is high.

Next, referring to FIG. 2, in the display device 1 of the present embodiment, light (represented by the optical path 1) emitted from the white LED 12 is applied to the eyeball 22 of the user at a predetermined position. Imaged at the pupil of the front surface. That is,
The white LED 12 and the pupil have a conjugate relationship, and the imaging lens 18 is mounted on the display device 1 so that the conjugate relationship holds.
White LED1 determined for each specific device in which
2 is arranged at a position corresponding to the position of the pupil of the user. Therefore, from the white LED 12 to the condenser lens 14
Most of the light passing through the iris 26 reaches the retina 24 via the lens 28 without being blocked by the iris 26. Therefore, as compared with the case where the light incident on the eyeball is blocked by the iris as shown in FIG. 28, the light emission power of the white LED 12 required to cause a constant light power to enter the pupil may be smaller. That is, the power consumed by the white LED 12 can be reduced. Here, white LE
Although the example in which the light emitted from D12 forms an image in the pupil on the front surface of the user's eyeball, if the condition that this light enters the pupil almost without being blocked by the iris 26 is satisfied, May slightly fluctuate in the optical axis direction.

Further, in the display device 1 of the present embodiment, the light (represented by the optical path 2) modulated and emitted from the liquid crystal display 16 forms an image on the retina 24 of the user at a predetermined position. ing. That is, the liquid crystal display 16 and the retina 24 have a conjugate relationship.
This allows the user to observe an image using the light modulated by the liquid crystal display 16. Here, the light in the optical path 2 passes through the lens 28 of the user. However, since the adjustment range of the lens 28 is relatively narrow, the above conjugate relationship is achieved by adjusting the position of the imaging lens 18. It has become possible.

In the present embodiment, the white LE which is a point light source is used.
Since D12 emits white light, a full-color image can be displayed on the liquid crystal display 16.
As a light source of the display device 1 as in the present embodiment, in addition to using a fluorescent lamp that emits white light as described in the section of the related art, a laser light source that emits monochromatic light may be used. By using a point light source that emits white light, a full-color image can be observed in addition to the above benefits. In this regard, the display device 1 of the present embodiment is extremely practical.

In this embodiment, a white LED 1 emitting white light is used.
As No. 2, a blue light emitting diode with a fluorescent substance applied to the outside thereof (emission range of about 300 μm square) is used. The fluorescent material receives blue light from the diode and emits light of various wavelengths in the visible light region, so that the white LED 12 emits white light as a whole. in this way,
By using the white LED 12 using a blue light emitting diode, a light source can be formed compactly and a light source having a very small light emitting area can be realized at low cost. Further, since a light emitting diode which can be driven with low power is used, power consumption can be reduced.
Note that an ultraviolet light emitting diode can be used instead of the blue light emitting diode.

A point light source that emits white light is, for example, R
It may be one using three LEDs of GB, or one provided with a light-shielding member having a pinhole in front of a white light source such as a halogen lamp or a miniature light bulb. The white LED 12 using a light emitting diode or an ultraviolet light emitting diode is preferable.

In this embodiment, the light emission area of the point light source is preferably 1 mm ² or less. This is because the spread of the luminous flux is suppressed by setting the light emitting area of the point light source to 1 mm ² or less, and the effect (deep depth of focus, high confidentiality) of the above-described display device 1 of the present reference example can be further enhanced. Because you can.

Next, a second embodiment of the present invention will be described. FIG. 3 is a schematic diagram showing a configuration of a hand-held portable display according to a second reference example of the present invention. FIG. 4 is a diagram showing a use state of the handheld portable display shown in FIG. As shown in FIG. 3, the hand-held portable display 30 of the present reference example
Incorporates the display device 1 described with reference to FIGS. The housing 32 of the hand-held portable display 30 is provided with two AA
It comprises a lower part 32a containing a battery 34 and an upper part 32b containing a display device 1.

As shown in FIG. 4, the lower portion 32a of the housing 32 has such a size and shape that the user can easily hold it with one hand. In addition, the user 41 moves the lower part 32a.
The power switch 35 of the hand-held portable display 30 is provided at a position corresponding to the index finger of the user 41 on the surface of the lower portion 32a when the user grips the. A video signal input connector 36 is provided on the bottom surface of the lower portion 32a, and the video signal input connector 36 is connected to the DVD player 42 via a video cable 43 as shown in FIG.
And the like. A video signal input from the video signal input connector 36 is supplied to a substrate 38 including a drive circuit (not shown) for the liquid crystal display 16 and the like.
It is sent to the liquid crystal display 16 via the LCD connector 31 and the LCD harness 33.

An image observation window 39 is provided at a position on the upper portion 32b of the housing 32 facing the imaging lens 18. As described above, the light emitted from the white LED 12 passes through the condenser lens 14, the liquid crystal display 16, the imaging lens 18, and the window 39, and forms an image on the optical axis 44 near the pupil of the user's eyeball 22. You. The window 39 may be a simple opening, or a transparent plate may be fitted into the opening. The user can observe a display image on the display device 1 from the window 39, and the user holds the hand-held portable display 30 with one hand, and holds a desired image at an arbitrary place such as outdoors. Can be seen. The upper portion 32b protrudes from the lower portion 32a on the side where the window 39 is provided.
Thereby, as can be seen from FIG.
When the face is brought close to the face 9, the face can be comfortably observed without contact with the lower part 32a.

The hand-held portable display 30 of this embodiment is a one-eye observation type having only one display device 1. Therefore, when using the hand-held portable display 30, the display image of the liquid crystal display 16 appears on one eye of the user, and the outside world image appears on the other eye. However, the human eye cannot adjust the focus independently of the left and right, and can focus only on one of the conscious faces even when the images observed by the left and right eyes are different. The hand-held portable display 30 of the present reference example has a characteristic that the display device 1 incorporated therein has a deep depth of focus as described above.
Since the displayed image on the liquid crystal display 16 can be observed with almost no defocus, a clear image without blurring can be seen with both eyes.

In this embodiment, the white LED 12, which is a point light source that can be made small, is used, so that the size of the hand-held portable display 30 can be reduced as a whole. Furthermore, since the white LED 12 has low power consumption, it is sufficient to use a relatively small and lightweight AA battery 34 as a power source.
Can be made smaller and lighter and have excellent portability.

In this embodiment, only one display device 1 is provided.
Although the hand-held portable display of the type that observes an image with one eye has been described, the hand-held portable display of the two-eye observation type having two display devices 1 is also described.
A similar configuration is possible.

In the case of the binocular observation type handheld portable display, the display device 1 incorporated therein has the characteristic that the depth of focus is deep as described above. There is an advantage that even if the display image on the liquid crystal display 16 is viewed by looking into the display 39, the display image can be observed with almost no blur. In this embodiment, a DVD as an image reproducing means is used.
Although the case where the playback device is provided outside the handheld portable display 30 has been described, an image playback unit may be provided inside the handheld portable display 30.

Next, a third embodiment of the present invention will be described. FIG. 5 is a schematic diagram showing a configuration of a personal projector according to a third reference example of the present invention. FIG.
As shown in FIG.
Incorporates the display device 1 described with reference to FIGS. The housing 52 of the personal projector 50 is
The bottom surface is designed flat so that it can be stably installed on the desk 57 having a flat top surface. The housing 5
2 is not limited to a flat bottom, and may be designed so that it can be stably installed on a table.

In the housing 52 of the personal projector 50, a white LED 12, a condenser lens 14, a control device 53 for the liquid crystal display 16, and a video signal input connector 54 are arranged. A DVD playback device 56 is connected to the video signal input connector 54 via a video cable 55.

The liquid crystal display 16 is supported by the housing 52 such that its surface is exposed to the outside. As described above, the light emitted from the white LED 12 is transmitted to the condenser lens 14, the liquid crystal display 16, and the imaging lens 1.
8, an image is formed on the optical axis 58 near the pupil of the user's eyeball 22. The optical axis 58 is inclined upward by an appropriate angle that makes it easy for the user to observe the display image. for that reason,
For example, the user can view a desired image in a comfortable posture while sitting on a chair.

According to this embodiment, there is an advantage that the size of the personal projector 50 can be reduced by using the white LED 12, which is a point light source that can be configured to be small. Further, since the white LED 12 has low power consumption, power consumption can be reduced, and for example, it can be operated with a small battery. Further, by incorporating the display device 1 described in the first reference example, the depth of focus is so large that blurring of the display image is unlikely to occur, and the display device 1 must be located at a predetermined distance from the display device 1 in a predetermined direction. An effect similar to that of the first reference example in which the confidentiality of the display image is high is achieved in that the display image cannot be viewed. For example, the display image on the liquid crystal display 16 cannot be seen from the directions indicated by the outline arrows A and B in FIG.

Next, a fourth embodiment of the present invention will be described. FIG. 6 is a schematic diagram showing a configuration of a head mounted display 60 according to a fourth reference example of the present invention. As shown in FIG. 6, a display device 2 similar to the display device 1 described with reference to FIGS. 1 and 2 is incorporated in the head mounted display 60 of the present embodiment. The display device 2 includes a white LED 12, a condenser lens 1
4. In addition to the liquid crystal display 16, the display device 1 has a concave mirror 19 as an imaging optical system. The difference between the display device 1 and the display device 2 is that the display device 1 has an imaging lens 18. On the other hand, the display device 2 has a concave mirror 19 having a positive power. The concave mirror 19 has the same function as the imaging lens 18 in the display device 1, and is arranged so that the white LED 12 and the user's pupil have a substantially conjugate relationship. Are arranged in a substantially conjugate relationship with the retina.

Head Mounted Display 6 of Reference Example 6
Reference numeral 0 denotes an attachment portion 61 for detachably attaching the concave mirror 19, a head fixing frame 62 for fixing the head mounted display 60 to the user's head, and a support bar 63 for supporting the attachment portion 61. Have. The mounting portion 61 is provided with a concave portion 61a, and the concave mirror 19 is detachably supported by the mounting portion 61 by being inserted into the concave portion 61a. The head fixing frame 62 curved along the shape of the user's head supports the white LED 12, the condenser lens 14, the liquid crystal display 16, the drive circuit 64 of the liquid crystal display 16, the battery 65, and the video signal input connector 66. Have been. An image reproducing device such as a DVD reproducing device (not shown) is connected to the video signal input connector 66, and the video signal input to the video signal input connector 66 is supplied to the drive circuit 64 and the liquid crystal display 16 via the cable 69. Is done.

The liquid crystal display 16 is supported by a head fixing frame 62 such that the surface thereof is exposed to the outside. The light emitted from the white LED 12 travels within the luminous flux range F shown in the drawing, passes through the condenser lens 14, the liquid crystal display 16, and the concave mirror 19, and passes on the optical axis 67 to the eye of the user's left or right eye. An image is formed near a point (the position of the pupil when facing the front) 68. By using the head mounted display 60 configured as described above, a user can observe a desired image in an arbitrary place such as outdoors, with both hands free.

According to the present embodiment, there is an advantage that the head mounted display 60 can be reduced in size because the white LED 12 which is a point light source which can be configured in a small size is used. Further, the white LED 12 has low power consumption, so that power consumption can be reduced, and the white LED 12 can be operated by the battery 65 having a small capacity and voltage. Therefore,
The head-mounted display 60 can be small, lightweight, and excellent in portability.

Further, since the display device 2 having the same function as that described in the first reference example is incorporated, the depth of focus is large, the display image is hardly blurred, and the display device 2 is provided with a predetermined distance. An effect similar to that of the first reference example in which the confidentiality of the display image is high is obtained in that the display image cannot be seen unless the user is away from a place separated by a predetermined distance in the direction. For example, the display image on the liquid crystal display 16 cannot be seen from the directions indicated by the outline arrows A and B in FIG.

Next, a fifth embodiment of the present invention will be described. FIG. 7 is a schematic diagram of a display device according to a fifth reference example of the present invention. The display device 3 illustrated in FIG. 7 includes a white LED 12 that is a point light source that emits white light, and a white LED 1.
Positive power condenser lens 14 for condensing light from 2
A scattering plate 17 for scattering the light condensed by the condenser lens 14, a liquid crystal display (spatial light modulating means) 16 for modulating the light passing through the scattering plate 17 and selectively transmitting the light, and a liquid crystal display 16. A positive power imaging lens 18 for imaging the modulated light on the retina 24 in the user's eyeball 22; In this embodiment, the scattering plate 17 can be arranged at an arbitrary position between the white LED 12 and the liquid crystal display 16.

In this embodiment, as in the first embodiment, the imaging lens 18 is arranged so that the white LED 12 and the pupil of the user's eyeball 22 have a conjugate relationship. Therefore, as described in the first reference example, the power consumed by the white LED 12 can be reduced. Further, an imaging lens 18 is arranged so that light modulated and emitted from the liquid crystal display 16 is imaged on a retina 24 of a user at a predetermined position. That is, the liquid crystal display 16 and the retina 24 have a conjugate relationship. Thereby, the user can use the liquid crystal display 16.
It is possible to observe an image by the light modulated by.

The scattering plate 17 is made of glass having irregularities formed on the surface on the liquid crystal display 16 side at a pitch larger than the wavelength of visible light, here about 0.5 to 10 μm.
This is a plate made of a transparent material such as PMMA (polymethyl methacrylate) and PC (polycarbonate). The scattering characteristics of the scattering plate 17 can be adjusted by changing the shape of the surface such as the uneven pitch. Here, the luminous intensity distribution by the scattering plate 17 is represented by a characteristic expression I (θ) = c described later.
It is assumed that n = 3 in os ⁿ θ is used.

Light emitted from one point of the white LED 12 aiming at one point on the liquid crystal display 16 (indicated by a path 71)
Are condensed by the condenser lens 14, become parallel to the optical axis 72, and enter one point on the scattering plate 17. And
This light is scattered by irregularities on the surface of the scattering plate 17,
The luminous flux is spread at the angle θ21.

Of the light beam that has passed through the scattering plate 17, the light modulated at one point of the liquid crystal display 16 is emitted from the liquid crystal display 16 at an emission angle θ22 through a virtual stop 73 for explanation. The emission angle θ22 is relatively larger than the emission angle θ12 in a case where the scattering plate 17 is not provided, that is, in a case similar to that described with reference to FIG.

Therefore, the light passes through the scattering plate 17 and exits at the angle θ.
The light emitted from the liquid crystal display 16 at 22 is a light beam having a width L1 wider than the pupil width of the user and approximately equal to that of the iris 28 (10 mm) at the front surface position of the user's eyeball 22. . On the other hand, the light emitted from the liquid crystal display 16 at the emission angle θ12 is a light beam having a width L2 smaller than the pupil width of the user at the front position of the user's eyeball 22.

Therefore, according to the present embodiment, the user's eyeball 22 slightly moves in the direction indicated by the white arrow C in the figure (±
Even if the distance is 5 mm, as long as the pupil is within the range indicated by the width L1, light modulated at one point of the liquid crystal display 16 enters the eyeball and forms an image on the retina 24 via the crystalline lens 28. In other words, it is relatively unlikely that the brightness of the display image becomes uneven due to the movement of the eyeball. On the other hand, the scattering plate 1
When there is no 7, since the width L2 itself is smaller than the pupil width, the user's eyeball 22 moves in the direction indicated by the arrow C, for example, ±±.
The light beam having the width L2 does not enter the pupil just by moving about 0.5 mm. For this reason, a large luminance unevenness occurs in the display image. As described above, in the present reference example, by disposing the scattering plate 17 between the condenser lens 14 and the liquid crystal display 16, it is possible to suppress luminance unevenness of a display image accompanying movement of the eyeball 22. .

Here, a preferable scattering characteristic of the scattering plate 17 will be described. First, as shown in FIG.
Is assumed to be approximately represented by I (θ) = cos ⁿ θ by the declination θ from the normal to the scattering plate 17. Here, I is a luminous intensity expressed in unit candela, and n is a coefficient depending on the surface shape of the scattering plate 17.
That is, as shown in FIG. 8, when the parallel light 81 is incident on one point on the scattering plate 17, the luminous intensity in a direction away from the normal 82 of the scattering plate 17 by an angle θ is represented by cos ⁿ θ. I do. At this time, the illumination efficiency and the luminous flux width L1 at the position corresponding to the pupil in accordance with the change of the coefficient n are shown in FIGS. Here, the illumination efficiency indicates the ratio of the light guided into the pupil of the light emitted from the white LED 12. The light beam width L1 is, as described above, the scattering plate 17.
Of the light emitted from one point of the liquid crystal display 16 after passing through at the front surface position of the user's eyeball (m
m).

As shown in FIG. 9, the illumination efficiency increases with an increase in the coefficient n, but the rate of increase decreases with an increase in the coefficient n. When the coefficient n exceeds 3, the degree of increase is very gentle. Become. From the viewpoint of illumination efficiency, the larger the coefficient n is, the more preferable it is. However, practically, it is preferable to be 3 or more. Further, as shown in FIG. 10, the luminous flux width decreases as the coefficient n increases, but the rate of decrease decreases as the coefficient n increases. When the coefficient n reaches 100, the luminous flux width approaches 1 mm. Here, 1 mm is an approximate minimum diameter of a human pupil, and when the light flux width becomes smaller than this, the above-described effect by using the scattering plate 17 cannot be substantially obtained. Therefore, the coefficient n is preferably 100 or less. Therefore, the coefficient n is preferably 3 or more and 100 or less in consideration of both the illumination efficiency and the light beam width. This makes it possible to maintain the overall width of the observation area where luminance unevenness does not occur at a minimum level or more while maintaining the illumination efficiency at a certain level or higher.

According to the present embodiment, since the same white LED 12 and condenser lens 14 as those in the first embodiment are used, although it depends on the coefficient n of the scattering plate 17 described above, the liquid crystal display 16 The emission angle θ22 of the light emitted from one point can be made relatively small, and the focusing angle of the light imaged at the focal point on the retina 24 is also a relatively small angle corresponding to a partial area of the crystalline lens 28. Can be That is, in the display device 3 of the present embodiment, the light focused on the retina 24 has a large depth of focus, and the image hardly appears blurred even if defocus occurs in the optical axis direction. Therefore, it is possible to allow the user to always observe a clear image even without performing focus adjustment.

Further, according to this embodiment, although depending on the coefficient n of the scattering plate 17, since the emission angle θ22 of the light emitted from one point of the liquid crystal display 16 is relatively small, the emitted light is Hardly reach anyone other than the user in Therefore, when the liquid crystal display 16 is exposed to the outside, the image displayed on the liquid crystal display 16 is hardly seen by anyone other than the user.
The confidentiality of the displayed image is high. These effects (deep depth of focus, high confidentiality of the image) increase as the coefficient n increases.

Next, a sixth embodiment of the present invention will be described. FIG. 11 is a schematic diagram of a display device according to a sixth reference example of the present invention. Display device 4 shown in FIG.
Is the same as the display device 3 except that the imaging lens 18 disposed at a position different from that of the display device 3 is used. Therefore, also in the present embodiment, the scattering plate 17
Thus, the same effects as in the fifth reference example can be obtained, such as suppressing uneven luminance and blurring of a display image due to.

However, in this embodiment, the imaging lens 1
Since the position of No. 8 is different from that of the fifth reference example, the white L
The ED 12 and the pupil of the user's eyeball 22 do not have a conjugate relationship, and the white LED 12 and the point 112 behind the retina 24 of the eyeball 22 have a conjugate relationship. For this reason, in this embodiment, a part of the light passing through the liquid crystal display 16 is blocked by the iris 26 and the like, so that a part of the liquid crystal display 16 cannot be observed. The light emission power required for the LED increases. However, also in the present reference example, since the conjugate relationship between the liquid crystal display 16 and the retina 24 is maintained, it is possible to observe at least a part of the image of the liquid crystal display 16. In addition,
In the present reference example, the white LED 12 and the pupil of the user's eyeball 22 lose the conjugate relationship by changing the position of the imaging lens 18, but the same applies to the white LED 12, the condenser lens 14, and the liquid crystal display 16. Can be realized alone or by moving a plurality of elements including the imaging lens 18, or by moving the user.

Next, a seventh embodiment of the present invention will be described. FIG. 12 is a schematic diagram showing a configuration of a hand-held portable display according to a seventh reference example of the present invention. As shown in FIG. 12, the hand-held portable display 120 of the second embodiment described in FIG. 3 except that the display device 3 described in FIG. 7 is incorporated in the hand-held portable display 120 of the present embodiment. It has the same configuration as 30.

Therefore, the hand-held portable display 120 of the present embodiment has the same effects as the hand-held portable display 30 of the second embodiment, and also has the effects of the display device 3 described in the fifth embodiment. Also play. In particular, the hand-held portable display 120 of the present embodiment guides the luminous flux from the liquid crystal display 16 into the pupil even when the position of the user's eyeball 22 is moved by providing the display device 3 with the scattering plate 17. It is possible to suppress luminance unevenness.

Next, an eighth embodiment of the present invention will be described. FIG. 13 is a schematic diagram showing a configuration of a personal projector according to an eighth embodiment of the present invention. As shown in FIG. 13, the personal projector 130 of the present embodiment is the same as the personal projector 50 of the third embodiment described in FIG. 5, except that the display device 3 described in FIG. 7 is incorporated. It is configured.

Accordingly, the personal projector 130 of the present embodiment is different from the personal projector 5 of the third embodiment.
0 has the same effect, and also has the effect of the display device 3 described in the fifth reference example. That is, the personal projector 130 of the present reference example is
Is provided with the scattering plate 17 so that the user's eyeball 2
Even if the position of No. 2 moves, the light flux from the liquid crystal display 16 can be guided into the pupil, and an effect of suppressing uneven brightness can be obtained.

In the case of the personal projector as in the present embodiment, the observer rarely observes the display image from the same position as compared with the above-mentioned hand-held portable display or head-mounted display. By increasing the range in which uneven brightness does not occur, the observer can easily find a position where the displayed image can be observed without uneven brightness. At the same time,
By appropriately setting and changing the value of the above-described coefficient n, there is an advantage that the display image can be prevented from being viewed from an unnecessarily wide range, and the confidentiality of the display image can be enhanced.

Next, a ninth embodiment of the present invention will be described. FIG. 14 is a schematic diagram showing a configuration of a head mounted display according to a ninth embodiment of the present invention. As shown in FIG. 14, a display device 5 similar to the display device 3 described with reference to FIG. 7 is incorporated in the head mounted display 140 of the present embodiment. The display device 5
It has a white LED 12, a scattering plate 17, a condenser lens 14, a liquid crystal display 16, and a concave mirror 19. The difference between the display device 5 and the display device 3 is that the display device 3 has an imaging lens 18 while the display device 5 has a concave mirror 19 having a positive power. The concave mirror 19 has a function equivalent to that of the imaging lens 18 in the display device 3, so that the white LED 12 and the user's pupil have a substantially conjugate relationship, and the concave mirror 19 is in contact with the LCD 16 and the user's retina. Are arranged in a substantially conjugate relationship. Except for this, the head mounted display 140 of the present embodiment has the same configuration as the head mounted display 60 of the fourth embodiment described with reference to FIG.

Therefore, the head-mounted display 140 of the present embodiment has the same effects as the head-mounted display 60 of the fourth embodiment, and the fifth embodiment.
The effect of the display device 3 described in the reference example is also achieved. That is, the head mounted display 140 of the present reference example
Is provided with the scattering plate 17 in the display device 5,
Even if the position of the user's eyeball 22 is slightly moved, the light flux from the liquid crystal display 16 can be reliably guided into the pupil, and an effect that luminance unevenness can be suppressed can be obtained.

Next, a first embodiment of the present invention will be described. FIG. 15 is a schematic diagram illustrating, from above, a configuration of the eyeglass-mounted head-mounted display according to the first embodiment of the present invention and a state in which the head-mounted display is mounted on the left eye side. FIG. 16 is a diagram illustrating a state in which the eyeglass-mounted head-mounted display according to the present embodiment is mounted on the right eye side from the front of the user. That is, the spectacle-mounted head-mounted display according to the present embodiment can be mounted on either the left or right side of the spectacles.

As shown in FIG. 15, the housing 154 of the head mounted display 150 of the present embodiment has
A display device 6 similar to the display device 3 described in (1) is incorporated. The display device 6 includes a white LED 12, a condenser lens 14, a scattering plate 17, a liquid crystal display (light modulation unit) 16, a mirror 152, and an imaging lens 18. In the display device 6, the conjugate relationship described in the first reference example is established. Mirror 152
Sets the optical axis 153 of the condenser lens 14 to the imaging lens 1
The light is bent at a right angle to the direction of the emission optical axis 176 defined by 8, and the light showing the display image is guided to one of the right and left eyes of the user through the opening 151.

In the housing 154, in addition to the display device 6,
When moving the head mounted display 150, the user moves his / her finger when moving the substrate 157 on which the CD drive circuit 155, the image inversion circuit 156, and the video signal input connector 158 are mounted, the substrate 160 on which the inversion switch 159 and the white LED 12 are mounted. Fixing protrusion 161 for attaching
And is incorporated. In addition, the spectacle frame 162 and the spectacle lens (the left eye lens 1 in FIG.
An elastic member, specifically, a rubber member 165 is attached to a portion in contact with (63).

Further, the housing 154 side and the fixed protrusion 161
When the head mounted display 150 is moved in a pair with the operation unit 166 for the user to attach his / her finger, the operation unit 166 is connected with an elastic member such as a spring 167. Further, the vicinity of the distal end of the holding portion 168 provided at the end opposite to the operation portion 166 is covered with an elastic member, specifically, a rubber member 169. The spring portion 167 always urges the holding portion 168 toward the rubber member 165 of the housing 154.

As shown in FIG. 15 or FIG. 16, when the head mounted display 150 is attached to the spectacles, the head mount display 150 is placed below the vine portion (the left vine portion 170 in FIG. 15 and the right vine portion 171 in FIG. 16). The holding portion 168 inserted into the glasses faces the housing 154 via the glasses lens 163 or 164. Therefore, the spring part 1
The two rubber members 165 and 169 sandwich the lens 163 or 164 by the elastic force of 67, and the head mounted display 150 is fixed to the glasses. As described above, in the present embodiment, the fixed protrusion 161, the operation part 166, the holding part 168, and the spring member 1
67 and the rubber members 165 and 169,
2 are configured.

In the head-mounted display 150 of the present embodiment, in order to align the optical axis 153 with the position of the user's pupil, that is, the eye point, the finger is used to press the fixed protrusion 161 and the operation unit 166 from both sides, and the spring is used. The rubber member 169 is attached to the lens 163 against the elastic force of the portion 167
Or housing 1 along the lens surface away from 164
Move 54. By such a simple operation, for example, as shown in FIG.
Can be smoothly moved to the position indicated by the broken line, and accordingly, the outgoing optical axis at the black circle (●) position 176a can be moved to the white circle (○) position 176b.
Then, when the user releases his / her finger from the fixed protruding portion 161 and the operation portion 166 when the user confirms that the emission optical axis coincides with the eye point 68, the two rubber members 165, 1
69 sandwiches the lens 163 or 164, so that the output optical axis 176 can be fixed to the eye point 68. With the simple configuration and operation as described above, the head mounted display 150 according to the present embodiment is provided.
In this case, since the user can perform the eye point adjustment two-dimensionally, the degree of freedom of the eye point adjustment is high, and the eye point 68 and the emission optical axis 176 can be matched over a wide range.

The head-mounted display 150 of the present embodiment is for one-eye observation configured to guide the imaged light to the left or right eyeball of the user. It can be configured to be compact and lightweight. Also, the fixing part 172 is used for the lenses 163 and 164 of the glasses.
, So that the head-mounted display 1 can be used even with glasses without frames.
It is possible to fix 50. Also, the frame 16
Since there are various shapes of the two vines 170 and 171, the head mounted display 15
In order to fix 0, it is necessary to change the shape and structure of the fixing portion 172 for each eyeglass to be attached. In the present embodiment, by adopting a configuration in which the lenses 163 and 164 are sandwiched from both sides to fix the head mounted display 150, such inconvenience is prevented. Furthermore, since the portion of the fixing portion 172 that contacts the lens is made of the rubber members 165 and 169, the lenses 163 and 164 are not damaged by being sandwiched.

As described above, the head mounted display 150 of the present embodiment is designed to be mounted on either the left or right side of the glasses. However, if the left and right mounting positions are changed, the housing 154 will be turned upside down, so that if no measures are taken, the user will see the image turned upside down. Therefore, the head mounted display 150 of the present embodiment includes the above-described image inversion circuit 156 and the inversion switch 159,
Even if the left and right attachment positions are changed, the user can always observe a normal image.

That is, as shown in FIG. 18, the case 1 is attached to the right eye and the case 1 is attached to the left eye.
When the head mount display 150 is attached to the right eye side, the reversing switch 159 is set in a protruding state because the 54 is turned upside down (a white arrow is drawn as a vertical mark of the housing in FIG. 18). When mounting on the left eye side, the reversing switch 159 is set in the retracted state. Then, either the projecting state or the retracting state of the inversion switch 159 is supplied to the scanning line vertical inversion means 191 and the scanning line left / right inversion means 192 (both shown in FIG. 19) of the image inversion circuit 156.

When the scanning line up / down reversing means 191 and the scanning line left / right reversing means 192 of the image reversing circuit 156 receive, for example, a signal indicating that the reversing switch 159 is in the protruding state, the video signal from the outside is directly transmitted to the LCD driving circuit. 155. When a signal indicating that the inversion switch 159 is in the retracted state is received, a video signal from the outside is inverted up and down by the scanning line up / down inversion means 191, and further, a signal inverted by the scanning line left / right inversion means 192 is displayed on the LCD. It is supplied to the drive circuit 155.

As described above, the head mounted display 150 of the present embodiment has the scanning line up / down reversing means 191 of the image inversion circuit 156 and the scanning line irrespective of whether the housing 154 is fixed to the left or right side of the glasses. Left and right reversing means 1
92 allows the user to always observe a normal image that is not upside down. Therefore, the head mounted display 150 can be used for both left and right, and there is an advantage that it is not necessary to separately prepare two types of display devices for left eye and right eye.

The head mounted display 150 according to the present embodiment has the same configuration as the display device 3 described with reference to FIG.
Since the display device 6 has the same configuration as that of the fifth embodiment, it has the same advantages as the display device 3 of the fifth reference example. That is, since the depth of focus is deep, the displayed image is hardly blurred, and the white LED 12 and the condenser lens 14 which are point light sources are used.
Since the white LED 12 and the pupil have a substantially conjugate relationship, the power consumption of the white LED 12 can be reduced. Further, since the white LED 12 is used, a color image can be observed.

Further, since the scattering plate 17 is used, it is possible to obtain an effect that even if the position of the eyeball is slightly shifted, there is no luminance unevenness. Also, at this time, as described in the first embodiment, the light intensity distribution when the scattering plate 17 is used is I (θ) = cos ⁿ θ, and the coefficient n is 3 or more and 100 or less (3 ≦ n ≦ 100). ) Is preferable. Further, in the present embodiment, instead of the liquid crystal display 16, a device that scans while modulating a laser beam to display an image may be used as the light modulating unit.

FIG. 20 is a diagram showing a head mounted display according to the second embodiment of the present invention, and is a diagram drawn from the back side (user side) of the glasses. As shown in FIG. 20, the head mounted display 2 of the present embodiment
The reference numeral 00 denotes that the fixing portion 201 is composed of an operating portion 202, two holding portions 206a and 206b connected to the operating portion 202, and a holding portion 20.
Rubber member 208 covering the vicinity of the tip of 6a, 206b
A spring portion 204 for urging the holding portions 206a and 206b toward the housing 154; and a rubber member 165 on the housing 154 side.
(See FIG. 15). The operation unit 202 and the two holding units 206a and 206b are configured by bending one long member into a substantially U-shape.

When the head-mounted display 200 of this embodiment is mounted on spectacles, the two holding portions 2
The vine 170 of the glasses is sandwiched between 06a and 206b. Thus, in the present embodiment, the fixing portion 2
Since the housing 154 can be fixed to the spectacles with the nose portion 170 of the eyeglass sandwiched therebetween, the fixing portion 201 is supported by the vine portion 170 so that the housing 154 becomes stable. In addition, it is possible to prevent the case in which the housing 154 is displaced from the predetermined position or falls off the glasses as much as possible. In the present embodiment, the holding portion is 2
Although a book is used, three or more holding portions may be provided, and a vine portion may be held between any two of them.

Although the display device 6 incorporated in the head mounted display according to the above-described embodiment has only one mirror, it may have, for example, two mirrors. Such an embodiment will be described with reference to FIG. The display device 7 incorporated in the head mounted display 210 according to the third embodiment of the present invention shown in FIG. 21 includes a white LED 12, a condenser lens 14, a scattering plate 17, a liquid crystal display 16, a mirror 212, and an imaging lens 18. , A mirror 214. Then, in the display device 7, the conjugate relationship described in the first reference example is established. The optical axis 216 of the display device 7 is bent at right angles at two positions of the mirrors 212 and 214, and the light showing the display image is guided to the left or right eyeball of the user via the opening 151. Here, the fixing part 21
8 is not a lens holding type as described in FIG.
The housing 219 is configured to be attached to one of the temples 170 or 171 by a screw mechanism or the like so that the housing 219 can be moved and the eye point can be adjusted. In FIG. 21, detailed illustrations other than the display device 7 are omitted.

Next, a tenth embodiment of the present invention will be described. FIG. 22 is a schematic diagram illustrating, from above, the configuration of the eyeglass-mounted head-mounted display according to the reference example of the present invention and a state in which this is mounted on the right eye side. FIG. 23 is a diagram illustrating a state in which the eyeglass-mounted head-mounted display of the present reference example is mounted on the right eye side from the front of the user. Similarly to the first embodiment, the eyeglass-mounted head-mounted display of the present reference example can also be mounted on either the left or right side of the eyeglasses.

As shown in FIG. 22, the head-mounted display 220 of the present reference example has a fixed housing 222 fixed to the vine 171 or 170 of the spectacles by a fixing clip 226 or 228, and a fixed housing 222. And two rotatable housings 224 that are rotatably mounted.

In the fixed housing 222, in addition to the white LED 12, the condenser lens 14, the scattering plate 17, the liquid crystal display (light modulating means) 16, and a video signal connected to an external image reproducing device via a video cable 43. Input connector 230, board 23 provided with a control circuit (not shown)
2 is included. In addition, a white L
A mirror 234 for reflecting light from the ED 12 and guiding the light to the left or right eyeball 22 (here, the right eye) of the user;
235 and an imaging lens 18 for imaging light modulated by the liquid crystal display 16.

The head mounted display 2 of the present reference example
A display device 8 similar to the display device 3 described in the fifth reference example is incorporated in 20. The display device 8 is white L
It has an ED 12, a condenser lens 14, a scattering plate 17, a liquid crystal display 16, a mirror 234, an imaging lens 18, and a mirror 235. In the display device 8, the conjugate relationship described in the first reference example is established.

Here, fixed housing 222 and rotating housing 224
24 will be described in detail with reference to FIG. FIG. 24 is an enlarged exploded perspective view of a connection portion 237 between the fixed housing 222 and the rotating housing 224. A circular opening 238 centered on the optical axis 236 of the condenser lens 14 is provided at the tip of the fixed housing 222. Then, a protruding portion 239 protruding in the direction of the optical axis 236
Are provided along the opening 238, and a fringe 240 that defines a recess 239 a is provided outside the protrusion 239 at the tip.

On the other hand, the rotating housing 224 has a concave portion 239a.
A circular opening 242 having a diameter equal to the outer diameter of the protrusion 239 is provided. When the concave portion 239 a engages with the opening 242, the rotating housing 224 is rotatable 360 ° around the optical axis 236.
2 and the rotating housing 224 can be stopped at an arbitrary position by friction between the two.

That is, as shown in FIG. 23, in the head mounted display 220 according to the present embodiment, the head is displayed by the simple structure described above and the simple operation of rotating the rotating housing 224 around the optical axis 236. Beam axis 24
4 can be adjusted to the eye point 68. This point will be further described with reference to FIG. FIG. 25 is a partially enlarged view of FIG. In the head mounted display 220 of the present reference example, the output optical axis 244 is set to the position of the user's pupil, that is, the eye point 6.
In order to adjust the number to 8, the rotating housing 224 is rotated by holding the rotating housing 224 with a finger. By such a simple operation, the rotary housing 224 at the solid line position can be smoothly moved to the broken line position, and the optical axis at the black circle (●) position 244a is indicated by the broken line. 2
It can be moved to a white circle (○) position 244b along 46. Therefore, when performing fine adjustment or the like of the user's eye point due to individual differences, if the rotating housing 224 is stopped at the stage where the user confirms that the optical axis 244 coincides with the eye point 68, the optical axis 244 is obtained. Eye point 68
Can be fixed.

The fixing clip 226 made of a flexible material is substantially L-shaped, and has a shape whose tip is slightly curved outward. Therefore, the fixed housing 22
By sandwiching the right vine part 171 between
The fixed housing 222 can be fixed to the glasses. Moreover, since the fixing clip 226 has flexibility, various vine portions 171 having different widths can be stably sandwiched. Also, the fixing clip 228 is configured similarly to the fixing clip 226,
The fixed casing 222 can be fixed to the eyeglasses by sandwiching the left side vine 170 between itself and the eyeglasses 22.

The fixing clips 226, 228 as described above
Therefore, the head mounted display 220 of the present embodiment can be easily attached to the glasses by retrofitting. In addition, these fixing clips 226, 2
28, the fixed casing 222 is attached to either the left or right vine portion 170 or 171 without turning the fixed casing 222 upside down.
22 can be fixed. Therefore, in the present embodiment, a mechanism for inverting the image, which is necessary for the head mounted display 150 of the first embodiment, is not required in the present embodiment. There is no need to separately prepare two types of head-mounted displays for the right eye and the right eye.

That is, as shown in FIG. 26, the rotating housing 224 needs to be turned upside down when mounted on the right eye side and when mounted on the left eye side, but the fixed housing 222 does not need to be turned upside down ( In FIG. 26, black arrows and white arrows are drawn as vertical marks of the fixed casing 222 and the rotating casing 224, respectively).

The head mounted display 220 of the present embodiment has a mirror 2 for guiding the light modulated by the liquid crystal display 1 to one of the right and left eyes of the user.
Since the rotating housing 224 has the rotation housings 34 and 235, the fixed housing 222 can be fixedly arranged on the side of the glasses,
The fixed housing 222 has the advantage that the field of view of the user is not obstructed and the head mounted display 220 is not bulky as a whole. In this embodiment, the imaging lens 18 is a rotating housing 22.
4, the imaging lens may be arranged in the fixed housing 222.

In the head mounted display 220 of the present embodiment, the rotating housing 224 is for single-eye observation and does not include the white LED 12, the condenser lens 14, the liquid crystal display 16, and the like, so that it is relatively small and lightweight. Since the rotating casing 224 is rotatably attached to the fixed casing 222, the rotating casing 224 can be easily applied only by applying a slight force when not observing a display image or in an emergency. Can be retracted out of sight.

In the head mounted display 220 of the present embodiment, the optical axis 243 of the imaging lens 18 coincides with the optical axis 236 of the condenser lens 14.
The imaging lens 18 and the mirror 234 are arranged.
Therefore, when adjusting the eye point, the rotating housing 224 is required.
Is rotated, the imaging lens 18 and the condenser lens 14 are rotated.
Are not deviated from each other, and the imaging performance is not deteriorated.

The head mounted display 220 of this embodiment has a display device 8 similar to the display device 3 described with reference to FIG. 7, except that the head mounted display 220 has mirrors 234 and 235 used for simply bending the optical axis. Therefore, it has the same advantages as the display device 3 of the fifth reference example. In other words, the displayed image is hardly blurred due to the large depth of focus, and the white LED 12 and the condenser lens 14 which are point light sources are used, and the white LED 12 and the pupil have a substantially conjugate relationship. Therefore, the power consumption of the white LED 12 can be reduced. Further, since the white LED 12 is used, a color image can be observed.

Further, since the display device 8 is provided with the scattering plate 17, it is possible to obtain an effect that even if the position of the eyeball is slightly shifted, there is no uneven brightness. Also, at this time, as described in the first embodiment, the light intensity distribution when the scattering plate 17 is used is I (θ) = cos ⁿ θ, and the coefficient n is 3 or more and 100 or less (3 ≦ n ≦ 100). ) Is preferable.

FIGS. 27 (a) and 27 (b) are views showing a modification of the fixing portion in the present reference example. FIG. 27 (a) is a view from the side of the glasses, and FIG. It is sectional drawing in the -A line. In this modification, a fixing clip 273 having substantially the same configuration as the fixing clip 226 has an opening 27.
6 is provided, and a screw receiving portion 277 is provided at a portion facing the opening 276 of the fixed housing 271. Then, by fixing the mounting screw 275 to the screw receiving portion 277 through the opening 276, the fixed housing 271 can be fixed to the right vine 170 of the glasses. In this modification, since the fixed housing 271 is attached to the glasses by the screw mechanism, the fixed housing 271 can be more reliably fixed to the glasses, and an unexpected situation such as the head mounted display falling off can be prevented. Can be prevented.

[0107]

As described above, according to the first aspect, the housing can be movably fixed to the eyeglasses by the fixing portion, so that the structure is not complicated, and the housing can be removed from the housing by a simple operation. The optical axis of the emitted light can be aligned with the eye point. Further, the casing for single-eye observation configured to guide the formed light to the left or right eyeball of the user can be configured to be relatively small and lightweight.

According to the second aspect, the fixing portion is configured to sandwich the lens of the spectacles from both sides, so that the fixing portion can correspond to spectacles without a frame and is fixed for each frame having various shapes. There is no need to change the shape of the part. In addition, the housing can be moved by a simple operation of relaxing fixing by pinching.

According to the third aspect, since the portion of the fixed portion that contacts the lens is made of an elastic member, the lens is not damaged by being pinched.

According to the fourth aspect, the housing is configured to be fixed to the spectacles with the fixing portion sandwiching the vine portion of the glasses therebetween, so that the fixing portion is supported by the hang portion. The case is stabilized, and it is possible to prevent a situation in which the case is displaced from a predetermined position or falls off from the glasses.

According to the fifth aspect, since the case has a fixed portion that turns the housing upside down when the left and right fixing positions of the glasses are changed, and an image upside down control means for turning the image upside down, Even if the body is fixed to the left or right side of the glasses, a normal image which is not always inverted upside down can be observed by the image upside down control means. Therefore, the display device can be used for both left and right, and it is not necessary to separately prepare two types of display devices for the left eye and the right eye.

According to the sixth aspect, since the light source is composed of a point light source emitting white light and a condensing optical system for condensing light from the point light source, most of the light emitted from the condensing optical system is The light can be given to the imaging optical system via the light modulation means, and the light can be used efficiently. Also,
Since the light condensed by the condensing optical system from the point light source is given to the light modulating means, the emission angle of the light emitted from the light modulating means is relatively small. Therefore, when this light enters the eyeball, the angle of focusing in the eyeball is small, and the depth of focus is deep. Therefore, when the focus deviates from the retina, almost no image blur occurs. Further, since the point light source emits white light, it is possible to display a full-color image by the spatial light modulator.

According to the seventh aspect, since the point light source and the first point (pupil) have a substantially conjugate relationship, most of the light passing through the light modulating means can be guided into the pupil. Therefore, the light emission power of the point light source required to cause a constant light power to enter the pupil may be small, and the power consumed by the point light source can be reduced. Further, since the light modulating means and the second point (retina) have a substantially conjugate relationship, an image by the light modulated by the light modulating means can be observed.

According to the eighth aspect, since the scattering plate is disposed between the point light source and the light modulating means, the spread of the light beam from the light modulating means is larger than when no scattering plate is provided.
A light beam from an arbitrary point on the light modulating means spreads to a relatively large area near the pupil, for example. Therefore, even when the eyeball deviates from the predetermined position to some extent, the light beam from the light modulating means can be surely guided into the pupil, and luminance unevenness hardly occurs.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a display device according to a first reference example of the present invention.

FIG. 2 is a schematic diagram for explaining an optical conjugate relationship in the display device shown in FIG.

FIG. 3 is a schematic diagram showing a configuration of a hand-held portable display according to a second reference example of the present invention.

FIG. 4 is a view showing a use state of the handheld portable display shown in FIG. 3;

FIG. 5 is a schematic diagram showing a configuration of a personal projector according to a third reference example of the present invention.

FIG. 6 is a schematic diagram showing a configuration of a head mounted display according to a fourth reference example of the present invention.

FIG. 7 is a schematic diagram of a display device according to a fifth reference example of the present invention.

FIG. 8 is a view for explaining preferable scattering characteristics of a scattering plate used in the display device shown in FIG. 7;

FIG. 9 is a graph showing a relationship between a coefficient n in an expression representing a luminous intensity distribution and illumination efficiency.

FIG. 10 is a graph showing a relationship between a coefficient n in an expression representing a light intensity distribution and a light beam width at a position corresponding to a pupil.

FIG. 11 is a schematic diagram of a display device according to a sixth reference example of the present invention.

FIG. 12 is a schematic diagram showing a configuration of a hand-held portable display according to a seventh reference example of the present invention.

FIG. 13 is a schematic diagram showing a configuration of a personal projector according to an eighth embodiment of the invention.

FIG. 14 is a schematic diagram showing a configuration of a head mounted display according to a ninth embodiment of the present invention.

FIG. 15 is a schematic diagram illustrating, from above, a configuration of the eyeglass-mounted head-mounted display according to the first embodiment of the present invention and a state where the head-mounted display is mounted on the left eye side.

FIG. 16 is a front view of the user, showing a state in which the eyeglass-mounted head-mounted display according to the first embodiment of the present invention is mounted on the right eye side.

FIG. 17 is a view for explaining movement of an emission optical axis accompanying movement of a housing in the first embodiment of the present invention.

FIG. 18 is a diagram showing a state in which the housing is turned upside down between the case where it is attached to the right eye side and the case where it is attached to the left eye side in the first embodiment of the present invention.

FIG. 19 is a block diagram showing an image upside down control unit in the first embodiment of the present invention.

FIG. 20 is a diagram illustrating a main part of a glasses-mounted head mounted display according to a second embodiment of the present invention.

FIG. 21 is a schematic diagram showing a schematic configuration of a glasses-mounted head mounted display according to a third embodiment of the present invention.

FIG. 22 is a schematic diagram illustrating, from above, a configuration of a glasses-mounted head-mounted display according to a tenth reference example of the present invention and a state in which this is mounted on the right eye side.

FIG. 23 is a diagram showing a state in which the eyeglass-mounted head-mounted display according to the tenth reference example of the present invention is mounted on the right eye side from the front of the user.

FIG. 24 is an enlarged exploded perspective view of a connection portion between a fixed housing and a rotating housing in a tenth reference example of the present invention.

FIG. 25 is a view for explaining a state of movement of an emission optical axis accompanying rotation of a rotary housing and a state of fixation by a fixing clip in a tenth reference example of the present invention.

FIG. 26 is a view showing a state in which only the rotating housing is turned upside down in the case of attaching to the right eye side and the case of attaching to the left eye side in the tenth reference example of the present invention.

FIG. 27 is a view showing a modification of the fixing portion in the tenth reference example of the present invention.

[Explanation of symbols]

 Reference Signs List 6 display device 12 white LED 14 condenser lens 16 liquid crystal display 17 scattering plate 18 imaging lens 24 retina 26 iris 29 focal point 150 head mounted display 154 housing 172 fixing portion

Claims (8)

[Claims] 1. A light source comprising: a light source; a light modulating means for modulating light from the light source; and an image forming optical system for forming an image of the light modulated by the light modulating means. A display device, comprising: a housing configured to guide the reflected light; and a fixing portion capable of movably fixing the housing to spectacles. 2. The display device according to claim 1, wherein the fixing unit is configured to sandwich the lens of the glasses from both sides. 3. The display device according to claim 1, wherein the fixing portion includes an elastic member at a portion in contact with the lens. 4. The display according to claim 2, wherein the fixing portion is configured to be able to fix the housing to the eyeglasses with a vine portion of the eyeglasses interposed therebetween. apparatus. 5. An image vertically inverting control means for inverting an image by light modulated by the light modulating means, wherein the fixing unit inverts the housing so as to invert the right and left sides of the glasses. The display device according to claim 1, wherein the display device is configured to be fixable. 6. The point light source, wherein the light source emits white light;
The display device according to claim 1, further comprising: a light-collecting optical system that collects light from the point light source. 7. The imaging optical system is arranged such that the point light source and a first point behind the imaging optical system by an arbitrary distance are substantially in a conjugate relationship, and 7. The optical modulator according to claim 6, wherein the light modulating means and a second point substantially behind the first point by a distance between the pupil and the retina are substantially in a conjugate relationship. The display device according to claim 1. 8. The display device according to claim 6, further comprising a scattering plate disposed between the point light source and the light modulation unit.