JP2010256657A - Transmission type display device and display unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission type display device and a display unit, in which a hologram virtual image is sufficiently viewed, and external daylight transmitted through sunglasses lenses around hologram elements is not suppressed more than required. <P>SOLUTION: The transmission type display device is provided with: sunglasses lenses 14 for diopter scale correction disposed just in front of each eyeball of a user; and transparent substrates 22 arranged in front of the sunglasses lenses 14 (on the object side) and serving as a video image projection monitor. Half mirror layers are arranged on the surfaces of the hologram elements inside the transparent substrates 22. The sunglasses lenses 14 are set specifically low in the transmittance of blue visible light, and are set specifically high in the transmittance of visible light in wavelength areas other than the blue. On the other hand, the half mirror layers are set in the opposite transmission characteristics of the sunglasses lenses 14. Accordingly, the user can view the hologram virtual image having relatively low luminance, projected on the hologram element, without causing difficulty to view the hologram virtual image due to the external light. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a transmissive display device and a display unit including a transmissive display device in which an image captured by a camera or an image based on external data, a video image, or the like is developed.

2. Description of the Related Art Conventionally, techniques for directly projecting images taken with a camera or the like, images based on external data such as movies, and the like near the user's eyeball or the retina have been developed.
Patent documents 1 and 2 are shown as an example of a display device using hologram technology. Further, as an example of application of these display devices, it can be considered to be used for visually impaired persons with low vision. That is, the surroundings (especially the front) of the visually impaired person who becomes a user is imaged with a camera, and is developed as a virtual image of a hologram in front of the user by a display device to provide visual assistance. In general, visually impaired people with low vision who have residual vision are not good at retina because large light energy is not good for the retina. Is restricted from entering the eye.
For example, a configuration as shown in FIG. 12 is assumed as a visual assistance display unit using the display device.
FIG. 12 shows an example using a transmissive display device. The transmissive display apparatus 101 includes a transparent substrate 102 and a video projection unit 103 disposed on the transparent substrate 102. In the transmissive display apparatus 101, both the real image and the virtual image of the hologram that have passed through the transparent substrate 102 can be visually observed in an overlapping state, so that the transmissive display apparatus 101 is referred to as “transmissive type”.
The image light beam incident on the transparent substrate 102 is guided to the hologram element 104 in the transparent substrate 102, is diffracted and reflected, and enters the pupil.

JP 2006-85011 A JP 2006-9827 A

However, since the brightness of the image projected onto the hologram element 104 is not so high, the intensity of the projection light projected onto the hologram element 104 is higher in the daytime when there is a large amount of light, even in an environment where the amount of light is low at night. However, the intensity of the external light is increased, and a situation in which the virtual image of the hologram cannot be sufficiently observed occurs. Therefore, for example, as shown in FIG. 13, a sunglasses lens 105 is disposed on the transparent substrate 102 of the transmissive display device 101 so that the transmittance is limited so that a virtual image of the hologram can be visually observed (in front of the transparent substrate 102). It is assumed that As a result, the image of the hologram element 104 can be seen even when the amount of light during the day is large.
However, the sunglasses lens 105 is set to have a much lower visible light transmittance than the sunglasses lens normally used by visually impaired persons with normal amblyopia as shown in FIG. 14 (a), and as shown in FIG. 14 (b). Although the three primary colors that make up the virtual image of the hologram can be seen, there is a problem that the visually impaired person with low vision sees only the portion indicated by the oblique line through the outside scene around the hologram element 104 and becomes very difficult to see. For this reason, there has been a demand for a technique that allows a virtual image of a hologram to be sufficiently visually observed when a sunglasses lens and a transmissive display device are used in combination, and that daytime external light passing through a sunglasses lens around the hologram element is not suppressed more than necessary. The above is an example for a visually handicapped person when a sunglasses lens and a display device are used together. However, the problem arises similarly when a sunglasses lens and a display device are used together for a person with a visual disability.
The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a transmissive display device and a display unit in which a virtual image of a hologram can be sufficiently observed and daytime external light transmitted through a sunglasses lens around the hologram element is not suppressed more than necessary.

  In the invention of claim 1 for solving the above-mentioned problem, a sunglasses lens having at least a predetermined transmission characteristic, and the sunglasses lens are directly or indirectly disposed, and the user's nose back and ear ring base are set as support portions. A first eyeglass comprising a frame body, a lens that is not at least a sunglasses lens, and a frame body in which the lens is directly or indirectly disposed and set with the user's nose back and ear ring base as support parts A transmissive display device mounted on any one of the second glasses, the video data output from the video data output means in a state of being mounted on the frame body, The reflection lens comprising the transparent lens disposed in an overlapping manner in the front-rear direction of the sunglasses lens or the lens leading to an internal reflection optical element, and the reflection While the wavelength separation filter is disposed on the surface of the optical element or in the region of the transparent substrate facing the reflective optical element, the transmission characteristic of the sunglasses lens has a particularly low visible light transmittance in a predetermined first wavelength range. And setting the transmittance of visible light in a predetermined second wavelength range different from that specifically high, and transmitting the visible light in the first wavelength range of the sunglasses lens as a transmission characteristic of the wavelength separation filter The position of the sunglasses lens and the reflective optical element for visible light in a state of being mounted on the first spectacles by setting the rate specifically high and setting the transmittance of visible light in the second wavelength range specifically low Transmission of the first wave in a state in which the visible light in the second wavelength region other than the position of the reflective optical element is allowed to pass through the sunglasses lens and mounted on the second glasses. That it has to permit the transmission of said reflective optical elements located in the visible light range as its gist.

In the configuration as in claim 1, in the transmissive display device, an image visualized based on the image data output from the image data output means is projected onto the reflective optical element to be a virtual image (image light by hologram). To recognize. The sunglass lens has a transmission characteristic in which the visible light transmittance in a predetermined first wavelength range is set specifically low, and the visible light transmittance in a predetermined second wavelength range different from that is set specifically high. Has been. Here, the reflective optical element is an element having a surface that intersects the gaze direction line of the user's eyes in the transparent substrate, and projects image light that is transmitted through the external light and reflected and guided in the transparent substrate. For example, a hologram element or a half mirror can be used.
For this reason, the transmissive display device is mounted on the first glasses in a state where there is mainly daylight outside, such as wearing a sunglasses lens. In this case, the visible light in the first wavelength range and the visible light in the second wavelength range cannot be transmitted in the visible light at the position of the reflective optical element, and external light passing through the sunglasses lens and the reflective optical element position is extremely limited. Therefore, it is possible to view a virtual image without being disturbed by outside light. In addition, the portion of the sunglasses lens other than the position of the reflective optical element transmits visible light in the second wavelength range, so that the scenery can be viewed.
On the other hand, the transmission type display device is mounted on the second glasses when the external light is low. In that case, visible light in the first wavelength region of the external light is transmitted and viewed at the position of the reflective optical element.
Here, the visible light in the predetermined first wavelength range set specifically low as the transmission characteristic of the sunglasses lens and the visible light in the predetermined second wavelength range set specifically high are in a certain continuous range. It is possible to change the transmittance and the wavelength range as appropriate. “Specific” means that the characteristics are extremely prominent compared to adjacent regions. The low setting includes not only the transmittance of 0% but also the case where the transmittance is significantly low with respect to visible light before and after that. Similarly, the high setting includes a case where the transmittance is not necessarily 100% but the transmittance is significantly higher than the visible light before and after the transmittance. The characteristic curve may have a plurality of peaks, and the first wavelength region and the second wavelength region are not necessarily characteristic curves that are connected in a sharp cut. Further, the visible light in the first wavelength range and the visible light in the second wavelength range are not limited to one each.
In order to give a predetermined transmission characteristic to a sunglasses lens, for example, it is common to use a colored glass containing a pigment showing absorption and transmission characteristics for a predetermined wavelength range, but it reflects a specific wavelength. In some cases, for example, an interference filter can be used. An interference filter is a filter that selects and transmits only light of a specific wavelength from the light spectrum, and is configured by laminating any dielectric thin film or metal thin film in any order to give the desired transmission characteristics. A multilayer structure.
The wavelength separation filter has a function of transmitting visible light in a part of wavelength range and reflecting part of visible light without transmitting. For example, a half mirror or colored glass can be considered as a kind of wavelength separation filter. The transmission and reflection characteristics of the wavelength separation filter can be changed as appropriate. The wavelength separation filter can be formed by depositing an arbitrary dielectric thin film or metal thin film by a known means such as a vapor deposition method or a sputtering method. The lens need not have a power for correcting myopia or astigmatism.

  According to a second aspect of the present invention, there is provided a video data output means, a video data output means, a transparent substrate for visualizing the video data output from the video data output means, and guiding the video light to an internal reflective optical element. And a frame on which the transmissive display device is mounted and the user's nasal back and ear ring base are set as support portions in a state where the transparent substrate is disposed in front of the eyeball of the user's face And a detachable sunglasses lens having a predetermined transmission characteristic disposed in a detachable manner directly or indirectly on the frame body and arranged in a front-rear direction of the transparent substrate. A wavelength separation filter is disposed on the element surface or a region of the transparent substrate facing the reflective optical element, while the transmission characteristics of the sunglasses lens are predetermined. The visible light transmittance in the first wavelength range is set specifically low, the visible light transmittance in a predetermined second wavelength range different from that is set specifically high, and the transmission of the wavelength separation filter As a characteristic, the sunglasses lens wearing state is set by specifically setting the visible light transmittance of the first wavelength range of the sunglasses lens to be specifically high and specifically setting the visible light transmittance of the second wavelength range to be low. The visible light at the position of the reflective optical element is suppressed, the visible light in the second wavelength region other than the position of the reflective optical element is allowed to pass through the sunglasses lens, and the first in the detached state of the sunglasses lens. The gist of the invention is to allow the transmission of visible light in the wavelength range of the reflective optical element position.

In the transmissive display device, the image formed on the basis of the image data output from the image data output means is projected onto the reflective optical element to produce a virtual image (image light from the hologram). To recognize. The sunglass lens has a transmission characteristic in which the visible light transmittance in a predetermined first wavelength range is set specifically low, and the visible light transmittance in a predetermined second wavelength range different from that is set specifically high. Has been. For this reason, when there is a large amount of external light during the day, such as when wearing a sunglasses lens, visible light in a predetermined first wavelength range and visible light in the second wavelength range cannot be transmitted through visible light at the reflective optical element position. Since the external light transmitted through the position of the sunglasses lens and the reflective optical element can be extremely limited, the virtual image can be viewed without being disturbed by the external light. In addition, the portion of the sunglasses lens other than the position of the reflective optical element transmits visible light in the second wavelength range, so that the scenery can be viewed.
On the other hand, the sunglasses lens is not necessary when there is little external light, so it will be removed. In that case, visible light in the first wavelength region of the external light is transmitted and viewed at the reflective optical element position. It will be. The transmission characteristics and configurations of the sunglasses lens and the wavelength separation filter are the same as described above.

Further, in the invention of claim 3, in addition to the configuration of the invention of claim 2, visible light in the predetermined first wavelength range set to be specifically low of the sunglasses lens is changed to visible light in the second wavelength range. On the other hand, the gist is that it is on the short wavelength side. This is because the sunglasses lens generally has a characteristic that cuts the short wavelength side with large energy.
According to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect, the video data output means is a photographing means. In other words, the superordinate concept is intended to include a case where the image data other than the actually captured video data is viewed. It is preferable that the photographing means is attached to the frame body.
Further, the gist of the invention of claim 5 is that, in addition to the configuration of the invention of any one of claims 2 to 4, the transparent substrate is arranged closer to the eyeball side than the sunglasses lens.
As a result, outside light is also limited around the reflective optical element, so that the reflective optical element portion can be more easily seen.

Further, the gist of the invention of claim 6 is that, in addition to the configuration of the invention of any one of claims 2 to 4, the sunglasses lens is arranged closer to the eyeball side than the transparent substrate.
According to a seventh aspect of the invention, in addition to the configuration of the sixth aspect of the invention, the color of the image light imaged by the transmissive display device is different from the transmission characteristic of the transmitted visible light of the sunglasses lens. The gist is that the image light has a different hue with respect to a real image by external light.
These claims are techniques for preventing the color of the hologram from being particularly difficult to see when the color at the position of the reflective optical element is partially transmitted through the sunglasses lens and the wavelength is partially cut to be the same color as the sunglasses lens. It is. At this time, the image light is transmitted through the sunglasses lens and has a different hue from the real image consisting of outside light reaching the eyeball, that is, the color is different, so the difference between the image and the real image becomes clear, so the user confuses the image with the real image It can be recognized as another image without. For example, when only blue light is cut out of visible light in a lens (that is, a sunglasses lens), the external light transmitted through the lens by the remaining light in the wavelength band becomes yellow. In this case, it is possible to use a color other than yellow as the image light.

According to an eighth aspect of the invention, in addition to the configuration of the seventh aspect of the invention, the hue of the image light is any one of blue, green, and red different from the hue of the visible light transmitted through the sunglasses lens. The gist.
A color image is synthesized from the three primary colors of RGB. By using only one of these colors, a hue that can be easily distinguished from a real image can be obtained. In particular, since the maximum sensitivity wavelength of humans is around 560 nm in photopic vision and around 500 nm in dark vision, it is just a wavelength range corresponding to green. Therefore, using green as the color of the video makes it easier to recognize the video.
According to a ninth aspect of the invention, in addition to the configuration of the eighth aspect of the invention, the image light is obtained by projecting an image photographed by photographing means with light of any of the three primary colors RGB. The gist.
In addition to the configuration of the invention according to any one of claims 7 to 9, the gist of the invention of claim 10 is that the sunglasses lens also serves as a diopter correction lens.

  In the invention of each of the above claims, when the sunglasses lens and the transparent substrate of the transmissive display device are in an overlapped state, it is possible to restrict external light from passing through the position of the reflective optical element on the transparent substrate, and a sufficient virtual image of the hologram can be obtained. As a result, the sunglasses lens that is out of the position of the reflecting optical element can partially transmit external light with a desired transmittance. On the other hand, the position of the reflective optical element on the transparent substrate that is visible without a sunglasses lens allows part of the external light to pass through the external light with a desired transmittance. Will not occur.

The perspective view of the display unit for visual assistance of Example 1 of this invention. The top view of the display unit for the same visual assistance. The block diagram explaining the optical system and electrical structure of a camera. Explanatory drawing explaining the optical structure of a video projection part. The graph which overlaps and shows the transmission characteristic of the transmission characteristic lens of a half mirror layer. The graph which shows the permeation | transmission characteristic of a lens superimposed with G light of a hologram element. Explanatory drawing which modeled an example of the scenery which a user looks visually. The perspective view of the display unit for visual assistance of Example 2 of this invention. The graph which overlaps and shows the transmission characteristic of the transmission characteristic lens of a half mirror layer. The graph which shows the transmission characteristic of a sunglasses lens. Explanatory drawing explaining selectively mounting in both 1st spectacles and 2nd spectacles in the transmission type display apparatus of another Example. The schematic diagram explaining the relationship between a transmissive display apparatus and eyes. The schematic diagram which arranged the sunglasses lens in FIG. (A) is a graph which shows the transmittance | permeability of a sunglasses lens, (b) is a graph explaining the relationship between the transmittance | permeability of a sunglasses lens, and the light of the image of a hologram.

Hereinafter, embodiments of a display unit for visual assistance according to the present invention will be described with reference to the drawings.
Example 1
As shown in FIGS. 1 and 2, a visual assistance display unit (hereinafter referred to as a display unit) 11 is a pair of left and right diopter corrections that doubles as a transmissive display device 13 mounted on a frame body 12 and a sunglasses lens. It consists of a lens 14. The frame body 12 includes a main frame 15 and a pair of temples 17 connected to both ends of the main frame by hinges 16. A bracket 18 is attached to the center inner surface of the main frame 15. The lens 14 is fixed to the bracket 18 by a lever 19 and can be removed by operating the lever 19.
The transmissive display device 13 includes a camera 20 as an imaging unit, a video projection unit 21, and a transparent substrate 22. In the present embodiment, the camera 20 is detachably mounted near the end of the left main frame 15. The image projection unit 21 is attached to the upper end of the right transparent substrate 22 in this embodiment, but may be attached to the left transparent substrate 22 or both sides. The camera 20 and the video projection unit 21 are connected by a cable 23. In this embodiment, the power supply to the camera 20 and the video projection unit 21 is not shown.

As shown in FIG. 3, the optical system of the camera 20 of the present embodiment corresponds to an RGB splitting optical circuit 25 composed of a beam splitter and a prism, and RGB light arranged behind the RGB splitting optical circuit 25. Three condensing lenses 26 and an imaging rod 27 are provided. The imaging rod 27 is connected to an amplifier 28 and a control circuit 29. The photographed image is divided into RGB three primary colors by the RGB division optical circuit 25 and led to the image pickup rod 27 to be converted into signals. Then, the RGB images converted into signals by the imaging rods 27 are processed by the amplifier 28 and the control circuit 29, respectively, and are output to the image projection unit 21 by taking over a predetermined signal system.
However, in this embodiment, the R light and the B light are modulated in the control circuit 29 so that the peak of the wavelength light is 560 nm, which is the peak of the G light. That is, only the hue of the R light and the B light is modulated to green without changing the information as an image. The peak position can be changed as appropriate.

As shown in FIG. 4, the video projection unit 21 of the present embodiment includes a light emitting diode (LED) 31, a condenser lens 32, and a liquid crystal display element (LCD) 33 housed in a housing 30. In this embodiment, the LEDs 31 are all green light emitting diodes that emit green light. Therefore, the video data divided into the three primary colors of RGB is projected in green. Image data output from the camera 20 via the cable 23 is projected from the LED 31 toward the condenser lens 32 in the video projection unit 21, and modulated by the LCD 33 to become a video light beam from the correction prism 22 a above the transparent substrate 22. Is incident on. The transparent substrate 22 becomes a total reflection prism and totally reflects the image light beam. The image light beam is guided to the hologram element 34 in the transparent substrate 22 while being reflected inside, and enters the pupil that is diffracted and reflected. As a result, the user views the virtual image of the image developed on the LCD 33.
A half mirror layer 35 as a wavelength separation filter is formed on the upper surface (the surface facing the pupil side) of the hologram element 34. In this embodiment, the transmission and reflection characteristics of the half mirror layer 35 are as shown by the solid line in FIG. Here, the characteristic curve of the half mirror layer 35 is a moderately decreasing portion on the short wavelength side with a high transmittance (a portion where the inclination gradually changes) and a slowly adjusting portion on the long wavelength side with a transmittance of approximately 0%. And a sharply-harmonic portion that connects these in a very short wavelength range. The sharp adjustment portion exists in the vicinity of 520 nm in Example 1. In the state where the lens 14 is not present, visible light is transmitted from the short wavelength side from 520 nm as shown in FIG.

FIG. 6 is a graph showing the transmission characteristics of the lens 14 according to the present embodiment, with the peak of the hologram element 34 overlapped with G light near 560 nm. In this embodiment, the wavelength region of 520 nm or less is cut and the sunglasses lens is also used. For this reason, the lens 14 is cut out of the blue light out of visible light, so that the real image that is viewed through the lens 14 has a yellowish hue (color tone). Here, if a color virtual image is projected on the hologram element 34 in the three colors of RGB, the B light is cut from the transmission characteristics of the lens 14, so that a yellowish virtual image by the G light and the R light In this embodiment, however, a virtual image is displayed only by the G light, although it is difficult to distinguish from the real image of the yellowish lens 14. Therefore, for example, as shown in FIG. 7, the green virtual image V is visually observed in a region smaller than the yellowish real image RL transmitted through the lens 14 in the visual field of the user.
Here, looking again at the state where the characteristics of the solid half mirror layer 35 in FIG. 5 and the transmission characteristics of the broken lens 14 are overlapped, both the lens 14 (sunglass lens) and the half mirror layer 35 (hologram element 34) are eventually seen. It can be understood that the visible light that is transmitted is a very small portion indicated by diagonal lines, and most of the visible light is not transmitted.

By adopting such a configuration, the embodiment has the following effects.
(1) The transmission characteristics of the lens 14 and the transmission characteristics of the half mirror layer 35 are almost opposite to each other. Almost no external light is transmitted through the overlapping portion. Therefore, the virtual image of the hologram with relatively low brightness projected onto the hologram element 34 is not difficult to see due to external light, and is visible to the user. For the portion of the lens 14 that does not overlap with the hologram element 34, visible light on the substantially long wavelength side excluding blue is visible as external light based on the transmission performance of the lens 14.
On the other hand, when the lens 14 is removed, the transparent substrate 22 basically transmits the external light as it is, and only the hologram element 34 portion is cut off on the long wavelength side of the visible light by the half mirror layer 35 and is visually bluish. The Rukoto.
(2) When the lens 14 also serving as a sunglasses lens is arranged on the eyeball side of the transparent substrate 22 of the transmissive display device 13, the real image RL visually viewed through the lens 14 and the hologram of the transparent substrate 22 due to the transmission characteristics of the sunglasses lens Although there was a possibility that the virtual image V displayed on the element 34 may have the same hue as the virtual image V, in this embodiment, the virtual image V displayed on the hologram element 34 is displayed in green and passed through the lens 14 serving as the background. Since the contrast is different from the yellowish real image RL that is visually observed, the difference between the two can be easily determined. In particular, green is easy to distinguish because it is a wavelength band that is easily recognized by human eyes.
(3) Since the virtual image V displayed on the hologram element 34 is projected with the G light instead of cutting the R light and the B light from the captured image data, the information as a video deteriorates. There is no.

(Example 2)
In Embodiment 2, as shown in FIG. 8, a sunglasses lens 41 is detachably disposed on the object side (outside) of the main frame 15 instead of the lens 14 in Embodiment 1. Detailed description of the same configuration as that of the first embodiment is omitted. The sunglasses lens 41 can be attached to and detached from the main frame 15 by a hook 42, and is used by being removed in a state where there is little outside light at night.
The half mirror layer 35 of Example 2 exhibits transmission characteristics as indicated by the solid line in FIG. Here, the characteristic curve of the half mirror layer 35 is composed of a moderately tuned part with a transmittance of 0%, a gradually modulated part with a transmittance of 100%, and a sharply tuned part that is almost perpendicular to connect these in a very short wavelength region. In the second embodiment, the sharp adjustment portion exists in the vicinity of 530 nm. Further, the sunglasses lens 41 of Example 2 exhibits transmission characteristics as indicated by the broken lines in FIGS.
Here, looking again at the state in which the characteristics of the solid half mirror layer 35 in FIG. 9 and the transmission characteristics of the broken sunglasses lens 41 are overlapped, both the sunglasses lens 41 and the half mirror layer 35 (hologram element 34) are eventually transmitted. Visible light is a very small portion indicated by oblique lines, and it can be understood that most visible light is not transmitted as in the first embodiment. In the state without the sunglasses lens 41, visible light is transmitted from the short wavelength side from 530 nm as shown in FIG.

With this configuration, the second embodiment has the following effects.
The transmission characteristics of the sunglasses lens 41 and the transmission characteristics of the half mirror layer 35 are almost opposite to each other, and external light hardly transmits through the portion where both overlap. Therefore, the virtual image of the hologram with relatively low brightness projected onto the hologram element 34 is not difficult to see due to external light, and is visible to the user. Further, in the portion of the sunglasses lens 41 that does not overlap with the hologram element 34, visible light on the substantially long wavelength side excluding blue is visible as external light based on the transmission performance of the sunglasses lens 41.
On the other hand, when the sunglasses lens 41 is removed, the transparent substrate 22 basically transmits the external light as it is, and only the hologram element 34 part is cut off by the half mirror layer 35 on the long wavelength side of the visible light and is visually bluish. Will be.

It should be noted that the present invention can be modified and embodied as follows.
In the above embodiment, the half mirror layer 35 is formed on the hologram element 34. However, the half mirror layer 35 may be formed on either (or both) surfaces of the transparent substrate 22 in the region where the hologram element 34 exists. Good.
-In the said Example 1 and Example 2, although the transmission type display apparatus 13 was mounted in the frame body 12, and the lens 14 or the sunglasses lens 41 was detachable, in short, a half mirror layer and a sunglasses lens are overlapped, It is only necessary to be able to use in a situation where there is no sunglasses lens depending on the usage situation. Therefore, as shown in FIG. 11, the transmissive display device 45 is detachably mounted on the first spectacles 44 having the sunglasses lens 43 as a lens, and the second spectacles 47 of the transparent lens 46 that is not the sunglasses lens are attached to the second spectacles 47 at night. It is also possible to install it.
The virtual image V may be displayed with R light instead of G light. Further, if the transmission characteristic of the lens 14 is changed, the virtual image V may be displayed with B light. Of course, the lens may have transmission characteristics other than those shown in FIG.
In the above embodiment, R light and B light are projected with G light, but R light and B light or G light and B light may be cut. Further, the peak of the wavelength light of the R light and the B light may be modulated into the G light in the control circuit 29.
The configuration of the video projection unit 21 is an example, and it is possible to set an optical system other than the above. The configuration of the camera 20 is also an example, and a virtual image using only G light may be displayed by means other than the above.
The camera 20 is not necessarily attached to the frame body 12, but may be set at a place other than the frame body 12.
In the above description, the display unit 11 for visual assistance is specifically described. However, the display unit 11 can be freely used for purposes other than visual assistance.
In addition, it is free to implement in a mode that does not depart from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 11 ... Display unit for visual assistance, 12 ... Frame body, 14 ... Lens (sunglass lens), 20 ... Camera as imaging means, 21 ... Transmission type display apparatus, 22 ... Transparent substrate, 34 ... Hologram element, 35 ... Wavelength Half mirror layer as a separation filter, 41 ... Sunglass lens.

Claims (10)

At least first glasses comprising: a sunglasses lens having at least a predetermined transmission characteristic; and a frame body in which the sunglasses lens is directly or indirectly arranged and set with a user's back of the nose and an ear ring base as a support portion; Mounted on any one of the second spectacles comprising a lens that is not a sunglasses lens and a frame body in which the lens is directly or indirectly disposed and the user's nose back and ear ring base are set as support parts A transmissive display device,
Transparently arranged in the front-and-rear direction of the sunglasses lens or the lens for visualizing the video data output from the video data output means in the state of being mounted on the frame body and guiding the video light to the internal reflective optical element Equipped with a substrate,
While a wavelength separation filter is disposed on the surface of the reflective optical element or in the region of the transparent substrate facing the reflective optical element, the transmission characteristic of the sunglasses lens has a specific visible light transmittance in a predetermined first wavelength range. The transmittance of visible light in a predetermined second wavelength range different from that is set to be specifically high, and the visible light in the first wavelength range of the sunglasses lens is set as the transmission characteristic of the wavelength separation filter. The sunglass lens and the reflection optics for visible light in a state of being mounted on the first spectacles by specifically setting the transmittance of the first eyeglasses and setting the transmittance of the visible light in the second wavelength range specifically low. While suppressing transmission of the element position, allowing transmission of visible light in the second wavelength region other than the position of the reflective optical element through the sunglasses lens, and mounted on the second spectacles Transmissive display device being characterized in that so as to allow transmission of said reflective optical elements located in the visible light of a wavelength range. Video data output means;
A transmissive display device having a transparent substrate that visualizes video data output from the video data output means and guides the video light to an internal reflective optical element;
A frame body that is mounted with the transmissive display device and is set with the nose back of the user and the base of the ear ring as support portions in a state in which the transparent substrate is disposed at a position in front of the eyeball of the user's face;
A detachable sunglasses lens having a predetermined transmission characteristic that is arranged to be detachable directly or indirectly on the frame body and is arranged in the front-rear direction of the transparent substrate,
While a wavelength separation filter is disposed on the surface of the reflective optical element or in the region of the transparent substrate facing the reflective optical element, the transmission characteristic of the sunglasses lens has a specific visible light transmittance in a predetermined first wavelength range. The transmittance of visible light in a predetermined second wavelength range different from that is set to be specifically high, and the visible light in the first wavelength range of the sunglasses lens is set as the transmission characteristic of the wavelength separation filter. The transmittance of visible light in the second wavelength range is set specifically low to suppress the transmission of visible light at the position of the reflective optical element in the wearing state of the sunglasses lens. And allowing the visible light in the second wavelength range other than the position of the reflective optical element to pass through the sunglasses lens, Display unit, characterized in that so as to allow transmission of said reflective optical elements located in the visible light wavelength range.   3. The display unit according to claim 2, wherein visible light of a predetermined first wavelength range set to be specifically low of the sunglasses lens is on a short wavelength side with respect to visible light of the second wavelength range. .   4. The display unit according to claim 2, wherein the video data output means is a photographing means.   The display unit according to claim 2, wherein the transparent substrate is disposed closer to the eyeball than the sunglasses lens.   The display unit according to claim 2, wherein the sunglasses lens is disposed on the eyeball side of the transparent substrate.   By forming the color of the image light imaged by the transmissive display device from light having a wavelength different from the transmission characteristic of the transmitted visible light of the sunglasses lens, the image light has a different hue with respect to a real image by external light. The display unit according to claim 6, wherein the display unit is a display unit.   The display unit according to claim 7, wherein the hue of the image light is any one of blue, green, and red different from the hue of the visible light transmitted through the sunglasses lens.   9. The display unit according to claim 8, wherein the image light is obtained by projecting an image photographed by photographing means with light of any of the three primary colors RGB.   The display unit according to claim 7, wherein the sunglasses lens also serves as a diopter correction lens.

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