JP2007271643A - Electronic spectacle device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and stably match the converging point of the Maxwell vision with a range of the eye pupils by using a simple configuration. <P>SOLUTION: The electronic spectacle device includes: an electronic spectacle main body 2 where image light of high directivity using the Maxwell vision is emitted; an eye cup 3 for fixing the position of a display screen formation unit (ocular lens 105) by the Maxwell vision for around the eyes; and a grip 4 fixed to the lower surface of the electronic spectacle main body 2 for holding the electronic spectacle main body 2 by user's hand and matching the conversing point of the image light from the electronic spectacle body 2 with the pupils. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic eyeglass device using a display device for projecting an image on a retina by Maxwell's view.

  Conventionally, magnified readers have been used by people with low vision. The magnified reading device captures images such as newspaper letters with a CCD camera and enlarges the captured images and displays them on a display screen such as a liquid crystal display screen. The reason for enlarging the image is that if the function of the lens of the eyeball is reduced and the retina is not focused, the display image on the liquid crystal display screen appears blurred, but the image is enlarged even if the display image is slightly blurred and blurred. This is because characters can be recognized as such.

  In addition, with the aging of the population, the number of people whose central part of the retina is damaged or whose function of the lens is extremely lowered is increasing. For those people, it's hard to use the conventional magnifier. The reason is that characters such as newspapers are photographed with a CCD camera, the photographed image is enlarged and displayed on a display screen such as a liquid crystal display screen, and the image on the display screen is viewed with one's own eyes. It is. In other words, the image on the display screen is viewed by using the retina of his / her eye whose central part is damaged or the lens of his / her eye whose function is extremely reduced.

  On the other hand, in Maxwell vision, image light with relatively high directivity is emitted instead of diffused light, and when the image light is put into the pupil of the eye, the depth of focus is deep. Even a low vision person whose cornea function is extremely deteriorated and cannot be clearly seen even when wearing glasses, the retina is in focus, and the image does not blur and does not blur and looks clear. In this way, in Maxwell's view, by projecting only parallel rays, a clear image is displayed no matter where the retina (screen) is in the projection direction, and the image looks clear regardless of the focus adjustment function of the crystalline lens. For this reason, focusing is not necessary, and there is no need to enlarge the display image as in a conventional enlarged reader. Moreover, in Maxwell vision, the eyes are not very tired because they are projected directly onto the retina without using the focus adjustment function of the crystalline lens.

  This Maxwell view will be further described. Maxwell's view is the principle of a pinhole camera, as shown in FIG. 7 (a). The liquid crystal display screen 100 displays an image based on a video signal by applying parallel rays from behind, a pinhole plate 101, A lens 102 for condensing image light from the liquid crystal screen 100 in the pinhole 101a of the pinhole plate 101, a lens 103 for filtering only parallel light by returning the image light from the pinhole 101a to parallel light, This can be realized by a combination of an optical system and an eyepiece lens 105 that converges parallel rays from the lens 103 in the pupil 104. Further, as shown in FIG. 7B, the image light A that has not exited from the pinhole 101a of the pinhole plate 101 is cut as diffused light at the periphery of the pinhole 101a, so that the image light exiting from the pinhole 101a. B is only image light with high directivity.

  Thus, in Maxwell's view, the image displayed on the liquid crystal screen 100 is not viewed using the focusing function of the crystalline lens 106 of the eye like a conventional magnifier reader, but the retina is not focused. An image can be projected directly on 107. Using this Maxwell vision, it is also possible to selectively project an image at an arbitrary retinal position where the retina 107 is not damaged. That is, in the case of a person whose retina is partially damaged, the light path can be set so that the image light is projected onto the normal retina portion.

  Further, in Maxwell's view, as described above, it appears even if the imaging ability of the crystalline lens 106 and the cornea is poor, but there is also a drawback because of Maxwell's view. That is, the convergence point X where Maxwellian vision converges must be located in the pupil 104. If the Maxwellian convergence point X and the pupil 104 do not match, the image cannot be seen. The pupil 104 has a diameter of about 4 mm, and the convergence point X in Maxwell's view must fall within this range.

  Non-patent document 1 discloses a paper in which this was used for mobile and experimented with low vision. In this Non-Patent Document 1, a display (retinal projection display device) that scans with a laser and projects image light onto the retina 107 is fixed to the head according to the position of the eye pupil 104 with a headband on the head. is doing.

Further, an image providing apparatus capable of giving a clear image to an eye disease person using the Maxwell vision is disclosed as Patent Document 1 by the inventor of the present invention.
Journal of Visual Imperial and Blindness March 2004; “A Comparable With a Head-mounted Laser Display and Conventional Low Vision 9” 48-48. JP 2002-282299 A

  However, when the conventional retinal projection display device using Maxwell's vision is mounted on the head with a headband, when the image is observed from the retinal projection display device, the convergence point of the image is first guided to the pupil. It was difficult to fix to the user, and it took too much time for the user to find the video. In addition, even if the pupil position is constant, a predetermined position along the face shape (which is easy to change), the hairstyle, etc., which is a user's own living body, so that the image portion is positioned within the pupil range for mobile use It was very difficult to fix the headband stably. Further, this retinal projection display device is configured so as to be attached to the head integrally with the headset, and is a mechanism having a certain degree of freedom of three-dimensional position. At the same time, it is necessary to fix the image convergence point and the pupil at a predetermined position, and this has become a complicated mechanism and a large-scale mechanism.

  The present invention solves the above-described conventional problems, and provides an electronic eyeglass device that can easily and stably adjust the convergence point of Maxwellian vision within the range of the pupil of the eye with a simpler configuration. With the goal.

  The electronic eyeglass device of the present invention is an electronic eyewear device using a display device for projecting an image on the retina through the pupil of the eye by Maxwell's view, and has a high directivity image using the Maxwell view. An electronic glasses main body in which light is emitted from the display screen of the display device, the display screen is provided by covering the periphery of the display screen in a cup shape, and the cup-shaped outer peripheral edge is applied to the periphery of the eye. Eyecup means that can fix the positional relationship between the screen and the pupil is provided, thereby achieving the above object.

  The electronic eyeglass device of the present invention further includes gripping means for supporting the electronic eyeglass body attached to the electronic eyeglass body.

  Further, the display device in the electronic eyeglass device of the present invention includes a signal processing unit that performs signal processing on the image signal from the image capturing unit, and a display image based on the image signal that has been subjected to predetermined signal processing by the signal processing unit. A display image forming unit to be formed; and an image light emitting unit that emits image light with high directivity using Maxwell's view from the display screen, using display image light from the display image forming unit.

  Further, the electronic eyeglass device of the present invention further includes attachment means for attaching or detaching the grip means and the electronic eyeglass main body, and the signal processing unit switches the horizontal and vertical inversion of the image on the display screen. An image reversal switching unit is provided.

  Furthermore, the eye cup means in the electronic eyeglass device of the present invention has one or a plurality of flow holes communicating with the inside and outside of the cup.

  Furthermore, a coating film for preventing fogging is provided on the surface of the display screen in the electronic eyeglass device of the present invention.

  With the above configuration, the operation of the present invention will be described below.

  In the present invention, a highly directional image light (parallel rays) using Maxwell's view is emitted from the display screen of the display device, and the display screen is provided so as to cover the periphery of the display screen in a cup shape. The eye-cup means that can fix the positional relationship between the display screen and the pupil by applying the cup-shaped outer peripheral edge to the periphery of the eye. Further, grip means for instructing the main body of the electronic glasses is attached to the main body of the electronic glasses.

  This makes it easy to attach a cup-shaped eye cup means to the tip of the display screen (eyepiece), quickly fix the convergence point of the image and the position of the pupil, and keep the fixation stable. Furthermore, extraneous light from the outside can be blocked, and the original image can be clearly observed. Moreover, since the grip means is attached to the electronic glasses main body that realizes Maxwell's view, and the user can freely move the electronic spectacle main body by grasping the grip means, it is possible to easily capture the image even at the beginning. . As a result, it is possible to easily capture an image even at the beginning, and to continue watching the image easily, and with a simpler configuration, the convergence point of Maxwell's vision can be easily and stably within the range of the pupil of the eye. It becomes possible to match.

  For example, a female screw for fastening means is provided on the upper and lower sides of the electronic eyeglass body, and a male screw is provided on one end face side of the grip means for supporting the electronic eyeglass body. It is possible to change the left eye. At this time, the image on the display screen based on the video signal (television signal) needs to be switched between the vertical and horizontal scanning directions by the image inversion switching unit.

  As described above, even a low vision person who can easily apply like normal glasses and does not need focusing and cannot obtain sufficient vision even with glasses, can clearly and clearly see the image. A small liquid crystal display screen (for example, 7 mm long × 9 mm wide; approximately 200,000 pixels) is displayed in front of the eyes, and images of television devices and personal computers are displayed, and the surroundings captured by a micro camera (subject ).

  As described above, according to the present invention, the electronic glasses main body from which image light with high directivity using Maxwell vision is emitted, and the eye cup means for fixing the position of the display screen by Maxwell vision with respect to the periphery of the eye Therefore, the convergence point of Maxwell's vision can be easily and stably adjusted within the range of the pupil of the eye with a simple configuration.

Hereinafter, a case where Embodiments 1 and 2 of the electronic eyeglass device of the present invention are applied to a hand-held electronic eyeglass will be described with reference to the drawings.
(Embodiment 1)
1 is a perspective view showing a configuration of a main part of a hand-held electronic eyeglass according to Embodiment 1 of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG. 5 is a rear view of FIG.

  1 to 5, a hand-held electronic eyeglass 1 according to the first embodiment includes an electronic eyeglass main body 2 that emits image light with high directivity using Maxwell's view, and an image light emitting unit (display device). A display screen; an eye cup 3 as an eye cup means for covering the eyepiece 105) in a cup shape, and fixed to the lower surface of the electronic glasses main body 2 by screws (attachment means), and holding the electronic glasses main body 2 by hand. And a grip 4 as a grip means for supporting the electronic eyeglass body for aligning the convergence point of the image light from the electronic eyeglass body 2 with the pupil.

  The electronic eyeglass main body 2 has an approximately U-shape in a bottom view and a rectangular cross section (the vertical cross section may be a circle or an ellipse in addition to this) on one end side as an image capturing means. Display image captured by a CCD camera (not shown) and subjected to predetermined signal processing by a signal processing unit, and a video signal line of image data and a power line cable 22 are inserted and connected to the power line and the video signal line A forming portion and a screen light emitting portion by Maxwell's view are incorporated in the housing 21 so that highly directional image light (parallel rays) is focused and emitted from the display image 23 on the other end side of the housing 21. It has become.

  Although the display image forming unit is not particularly illustrated here, as an example, a lamp light source connected to a power supply line and a light source from the lamp light source are R (red), G (green), and B (blue). Spectral optical system that divides into each color, and each color spectrum (parallel rays) dispersed by this spectroscopic optical system is irradiated as backlight, and power line and video signal line are connected to display liquid crystal for each color. R (red), G (green), and B (blue) transmissive liquid crystal display devices, and image light of each color from the transmissive liquid crystal display devices of the respective colors are combined and emitted as color display images. And a synthetic optical system. Alternatively, R (red), G (green), and B (blue) filters are periodically provided on a lamp light source connected to a power supply line (power supply unit) and a single transmission type liquid crystal display panel irradiated with the lamp light source. It comprises a coated display board and has a system for emitting a color display image from this display board.

  The screen light emitting portion in Maxwell's view is not particularly shown here, but is similar to the configuration of the optical system in FIG. 7A, and image light emitted from the surface of the combined optical system of the display image forming portion. Is condensed on the pinhole 101a of the pinhole plate 101 by the condensing lens 102, and image light with high directivity emitted from the pinhole 101a is converted back to parallel rays by the lens 103 and filtered, and then the eyepiece A parallel light beam is emitted so that the parallel light beam is focused at 105 and converged in the pupil 104 of the user.

  The eye cup 3 is made of a resin material such as silicon rubber or a metal material, and is attached to the other end side of the housing 21 to emit image light with high directivity using Maxwell's view. The outer shape covers the periphery of the image light exit surface (display screen) of the eyepiece 105 in a cup shape so that the optical axis of the (display screen) is positioned at the center position of the pupil. The outer peripheral shape of the eye cup 3 is a shape that fits (matches) the biological shape around the human eye. Thus, the positional relationship between the eyepiece lens 105 (display screen) and the pupil, that is, the up / down / left / right direction of the eye with respect to the image light exit surface of the eyepiece lens 105 is obtained by placing the cup-shaped outer peripheral edge of the eyecup 3 around the eye. And positioning in the depth direction can be easily performed. If this eye cup 3 is used, it becomes easy to find the image emitted from the image light exit surface of the eyepiece 105 first.

  The eye cup 3 is shaped like a cup so as to cover the user's eyes, but a plurality of flow holes 31 are provided around the eye cup 3 so as to withstand long-time use. The surface of the eyepiece lens 105 is coated with a special film (antifogging filter 105a) for preventing fogging. This prevents the lens surface from becoming clouded even when used for a long time. Considering the case where there is no such eyecup 3, the user gets tired of keeping the eye pupil and the convergence point of Maxwell's vision aligned or fixed. Further, the eye cup 3 can shield the light so that an image can be clearly seen even in a bright place.

  The grip 4 has a female threaded portion of a cylindrical projection 24 provided at the center of the bottom surface of the housing 21 of the electronic glasses main body 2 so that the male threaded portion at one end thereof can be balanced in terms of size and weight. It is fastened to be fixed. The female thread portion is also formed on the upper surface of the columnar protrusion 24 provided at the center of the upper surface of the housing 21 of the electronic glasses main body 2. 1 to 5, the grip 4 is attached to the center of the bottom surface of the housing 21 for the right eye. However, when the grip 4 is replaced with the center of the top surface of the housing 21, the grip 4 can be used from the right eye to the left eye. . In this case, since the image needs to be turned upside down, left and right, an image inversion processing circuit is provided in the signal processing unit, and switching to invert the image is switched to an image inversion processing circuit having a function of turning up and down the image data. A switch may be provided. These image inversion processing circuits and changeover switches constitute image inversion switching means that can switch inversion in the horizontal direction and the vertical direction with respect to the image on the display screen. As described above, the image light emitted from the image light emitting surface is obtained by holding the grip 4 in the hand and feedback adjusting the position of the image light emitting surface (display screen) at the other end of the housing 21 of the electronic glasses main body 2. The convergence point can be easily adjusted to the position of the pupil.

With the above configuration, the cup-shaped outer peripheral edge is pressed around the eye, and the position of the display screen (the eyepiece lens 105) of the screen light emitting unit in the Maxwell view is aligned and fixed with respect to the pupil of the eye. By providing the eye cup 3 and the grip 4 for holding the electronic glasses main body 2 by hand, the convergence point and pupil of the image light emitted from the image light exit surface using Maxwell's view with a simple configuration Can be adjusted easily and stably from the beginning.
(Embodiment 2)
In the first embodiment, the display image forming unit including the light source lamp and the screen light emitting unit by Maxwell's view are built in the housing 21 of the electronic glasses main body 2. However, in the second embodiment, the case of the first embodiment is described. This is a case where the grip 4 is not provided, and the display image forming unit including the light source lamp is not built in the housing of the electronic glasses main body, and only the screen light emitting unit by Maxwell's view is built.

  FIG. 6 is a perspective view showing a main configuration of the hand-held electronic glasses according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the member which show | plays the effect similar to the member of FIG.

  In FIG. 6, the hand-held electronic glasses 1A according to the second embodiment include an electronic glasses main body 2A that emits image light with high directivity using Maxwell's view, and an eye cup that covers the image light emitting portion in a cup shape. 3.

  The electronic glasses main body 2A is an optical fiber through which display image light based on image data captured by a CCD camera (not shown) and subjected to predetermined signal processing is propagated on one end side of the housing 21A. The cable 22A is inserted into the housing 21A, and only the display screen forming portion for forming the display screen in the Maxwell view is built in the image light emitted from the end face of the optical fiber, and the other end side of the housing 21A. The display image emitting unit 23 emits image light with high directivity. In the second embodiment, since there is no grip 4 as in the first embodiment, the electronic glasses main body 2A is held by hand.

  With the above configuration, by providing the eye cup 3 that fixes the position of the display screen forming unit (the eyepiece lens 105) in the Maxwell view with respect to the periphery of the eye, the eye light is emitted from the image light emission surface using the Maxwell view. The convergence point of image light and the pupil can be easily and stably matched from the beginning. In this case, the electronic glasses main body itself can be made small. Further, when used from the right eye to the left eye, the hand-held electronic glasses 1A are turned upside down. However, since the image data needs to be turned upside down, as in the case of the first embodiment, An image inversion processing circuit and a changeover switch may be provided in the signal processing unit so that the image data can be switched so as to be turned upside down.

  In the first and second embodiments, the hand-held electronic glasses are described for one eye. However, the present invention is not limited to this, and the left and right parts can be connected to be used for both eyes. For example, by providing two hand-held electronic glasses 1 or 1A according to Embodiments 1 and 2 in series for both eyes, not only healthy subjects but also low vision people can separately display images with the left and right eyes. It can be applied to stereoscopic (3D) images that give a sense of depth.

  As mentioned above, although this invention was illustrated using preferable Embodiment 1, 2 of this invention, this invention should not be limited and limited to this Embodiment 1,2. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range based on the description of the present invention and the common general technical knowledge from the description of the specific preferred embodiments 1 and 2 of the present invention. Patents, patent applications, and documents cited herein should be incorporated by reference in their entirety, as if the contents themselves were specifically described herein. Understood.

  In the field of electronic eyeglass devices using a display device for projecting an image on the retina by Maxwell's view, the present invention makes it possible to easily set the convergence point of Maxwell's view within the range of the pupil of the eye with a simpler configuration. Can be adjusted stably.

It is a perspective view which shows the principal part structure of the handheld electronic glasses which concern on Embodiment 1 of this invention. It is a front view of FIG. It is a top view of FIG. It is a bottom view of FIG. It is a rear view of FIG. It is a perspective view which shows the principal part structure of the handheld electronic glasses which concern on Embodiment 2 of this invention. (A) is a schematic side view of an optical system for explaining a main part configuration of a display screen forming unit by Maxwell view, and (b) is a schematic side view of an optical system for explaining the principle of Maxwell view. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Handheld electronic glasses 2,2A Electronic glasses main body 21,21A Housing 22,22A Cable 23 Display image emitting part 24 Columnar projection part 3 Eye cup 31 Distribution hole 4 Grip 101 Pinhole plate 101a Pinhole 102 Condensing Lens 103 Lens 105 Eyepiece 105a Anti-fogging filter

Claims (6)

An electronic spectacle device using a display device for projecting an image on the retina through the pupil of the eye by Maxwell's vision,
An electronic eyeglass main body in which image light with high directivity using the Maxwell view is emitted from the display screen of the display device and a periphery of the display screen are provided in a cup shape, and the cup-shaped outer peripheral end An electronic eyeglass device comprising eyecup means capable of fixing the positional relationship between the display screen and the pupil by placing an edge portion around the eye.   2. The electronic eyeglass device according to claim 1, further comprising grip means for supporting the electronic eyeglass body attached to the electronic eyeglass body.   The display device includes a signal processing unit that processes an image signal from an image capturing unit, a display image forming unit that forms a display image based on an image signal subjected to predetermined signal processing by the signal processing unit, 3. The electronic glasses according to claim 1, further comprising: an image light emitting unit that emits image light with high directivity using Maxwell's view from the display screen using display image light from the display image forming unit. apparatus. An attachment means for attaching or detaching the grip means and the electronic glasses main body;
The electronic eyeglass device according to claim 3, wherein the signal processing unit includes an image reversal switching unit that can switch the reversal of the image on the display screen in the horizontal direction and the vertical direction.   The electronic eyeglass device according to claim 1, wherein the eye cup means has one or a plurality of flow holes communicating between the inside and outside of the cup.   6. The electronic eyeglass device according to claim 1, wherein a coating film for preventing fogging is provided on a surface of the display screen.

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