JP2013207665A - Spectacles for stereoscopic vision and adjusting method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily view a stereoscopic image displayed on a stereoscopic image display device in the middle of a remote place and a near place such as a television screen and a screen.SOLUTION: When a viewer wears spectacles for stereoscopic vision 1, a right eye lens 1R is arranged in a front face of a right eye of the viewer and a left eye lens 1L is arranged in a front face of a left eye of the viewer. The right eye lens 1R and the left eye lens 1L are base-in prisms where light is refracted in a horizontal direction. Strength of the prism in the right eye lens 1R is a refraction rate where a sight line turns to a center of a right eye image displayed on a stereoscopic display device, and strength of the prism in the left eye lens 1L is a refraction rate where a sight line turns to a center of a left eye image displayed on the stereoscopic display device. The sight lines are bent to an inner side by a prism operation of the right eye lens 1R and the left eye lens 1L, and the viewer can view a point on the stereoscopic display device in a state where the eyes face almost the front.

Description

  The present invention relates to stereoscopic glasses used for assisting stereoscopic vision and a method for adjusting stereoscopic glasses.

  In recent years, a technique for providing a stereoscopic image (a still image or a moving image) that allows a viewer to perceive a stereoscopic effect or a sense of depth has become widespread. Two horizontal images with left and right parallax (left-eye image and right-eye image) are displayed on the screen, and the viewer visually recognizes the left-eye image with the left eye and the right-eye image with the right eye. By doing so, the viewer is made to perceive a stereoscopic image. When viewing a stereoscopic image displayed in this way, it is necessary to adjust the convergence angle while keeping the focus on the screen. The convergence angle is an angle formed by the eyes of both eyes.

  However, there are a certain number of people who have inherently weak convergence angle adjustment power (hereinafter referred to as convergence power). Even if the convergence force is not weak in nature, the convergence force becomes weaker with aging. In addition, there are a certain number of people with exotropia and exotropia with one eyeball facing outward. People with external strabismus and external oblique positions need stronger convergence power than those with normal eyes.

  Cited Document 1 discloses glasses in which prisms having different refractive powers are used for a main body lens used for far vision and an auxiliary lens used for near vision. For example, if the main body lens does not have a prism, and the auxiliary lens used for near vision is a spectacle having a prism with a basal direction on the nose side, the convergence power is assisted and the convergence power is weak. Even so, when the line of sight is moved from a distant place to a near place, it is naturally converged.

JP 2011-107298 A

  However, the invention described in the cited document 1 is an invention related to glasses used in a normal life by a person having an abnormality in convergence or spread, or a person with strabismus or an oblique position, and is an invention corresponding to viewing a stereoscopic image. is not.

  Such glasses are usually prescribed for a distance (for example, 5 m). Therefore, when watching a television indoors (the distance to the television is generally about 2.5 m), especially when viewing a stereoscopic image, the viewer needs to be congested, causing eye strain.

  Even for a person who has no abnormality in congestion and spread, continuing the congestion while viewing the stereoscopic image leads to eye strain. This also occurs when a monitor that displays a stereoscopic image is not at a short distance.

  Currently, 3D movies and televisions capable of displaying stereoscopic images are becoming widespread, and there is a demand for glasses that can reduce eye strain even if viewing of stereoscopic images is continued.

  The present invention has been made in view of such circumstances, and for stereoscopic viewing that can facilitate viewing of a stereoscopic image displayed on a stereoscopic image display device installed in the middle between a distant place and a near place such as a television. An object of the present invention is to provide a method for adjusting glasses and stereoscopic glasses.

  The present invention has been made to achieve the above object, and the stereoscopic glasses according to the present invention are, for example, stereoscopic glasses including a right-eye lens and a left-eye lens, and the right-eye lens is provided. And the left-eye lens is an arbitrary point in the vicinity of the approximate center of the stereoscopic image display means installed at an intermediate distance that is an intermediate distance between the distant and the near, the line of sight of the wearer wearing the stereoscopic glasses. It has a prism having a refractive power (hereinafter referred to as an appropriate refractive power).

  The right-eye lens and the left-eye lens are lenses formed so that the refractive power of the prism can be adjusted, and based on the first acquisition means for acquiring the intermediate distance and the acquired intermediate distance, Adjusting means for adjusting the refractive power of the right-eye lens and the left-eye lens so as to have the appropriate refractive power. Note that the intermediate distance may be acquired based on the measured result, or a value stored in a storage unit or the like may be acquired.

  The right-eye lens and the left-eye lens include two prisms provided so that the bases are opposite to each other, and the adjustment unit includes a mechanism that rotates the two prisms in the reverse direction. Good.

  The mechanism for rotating the two prisms in the reverse direction includes a bevel gear provided on each of the two prisms, a connecting gear for connecting the bevel gear, and a rotating means for rotating the connecting gear, May be provided.

  The right-eye lens and the left-eye lens are substantially cylindrical lenses in which a polymer gel is enclosed in an outer wall formed of a transparent elastic material, and a conductive layer is formed on both end faces. Control means for controlling a voltage applied to the conductive layer may be provided.

  A second acquisition unit configured to acquire an interval between the right eye and the left eye of the wearer; and the adjustment unit configured to adjust the refractive power of the right eye lens and the left eye lens based on the acquired interval between the right eye and the left eye. May be adjusted.

  The appropriate refractive power may be corrected by the wearer's ability regarding stereoscopic vision.

  The method for adjusting stereoscopic glasses according to the present invention is, for example, an adjustment method for stereoscopic glasses including a right-eye lens and a left-eye lens having a variable refractive index. The step of calculating the refractive power required to direct the wearer's line of sight to an arbitrary point in the vicinity of the approximate center of the stereoscopic image display means installed at an intermediate distance that is an intermediate distance, and the calculated refractive power. Adjusting the right-eye lens and the left-eye lens as described above.

  The stereoscopic image display means displays a stereoscopic image consisting of a right-eye image and a left-eye image, and the step of calculating the refractive power includes, for the right-eye lens, the right-eye displayed on the stereoscopic image display means. The center of the image for the left eye may be set as the arbitrary point, and the refractive index of the lens for the left eye may be calculated with the center of the image for the left eye displayed on the stereoscopic image display means as the arbitrary point.

  The step of calculating the refractive power may include a step of measuring the position of the wearer's black eye and a step of calculating a distance between the wearer's right eye and left eye based on the measurement result.

  The step of calculating the refractive power may include a step of measuring a distance to the stereoscopic image display unit and a step of calculating the intermediate distance based on the measurement result.

  The present invention has been made in view of such circumstances, and can facilitate viewing of a stereoscopic image displayed on a stereoscopic image display device installed between a distant place and a near place such as a television.

It is a schematic block diagram for demonstrating the use condition of the stereoscopic spectacles 1 which concern on the 1st Embodiment of this invention. 1 is a schematic diagram of a stereoscopic display device 100. FIG. 4 is a diagram for explaining the principle of stereoscopic display of the stereoscopic display device 100. FIG. It is a schematic explanatory drawing for demonstrating the principle of a stereo image. It is a schematic explanatory drawing for demonstrating the principle of a stereoscopic vision. 1 is a perspective view of stereoscopic glasses 1. FIG. It is a schematic block diagram for demonstrating the spectacles 1 for stereoscopic vision. It is a figure for demonstrating the mode of the stereoscopic vision assistance at the time of wearing the glasses 1 for stereoscopic vision. It is a perspective view of the spectacles 2 for stereoscopic vision which concerns on the 2nd Embodiment of this invention. It is a schematic block diagram for demonstrating the spectacles 2 for stereoscopic vision. It is a schematic block diagram of the right-eye lens and the left-eye lens of the stereoscopic glasses 2. It is a figure for demonstrating the mode of the stereoscopic vision assistance at the time of wearing the glasses 2 for stereoscopic vision. It is a figure for demonstrating the mode of the stereoscopic vision assistance at the time of wearing the glasses 2 for stereoscopic vision. It is a figure for demonstrating the mode of the stereoscopic vision assistance at the time of wearing the glasses 2 for stereoscopic vision. It is a perspective view of the spectacles 3 for stereoscopic vision which concerns on the 3rd Embodiment of this invention. It is a schematic block diagram of the right-eye lens and the left-eye lens of the stereoscopic glasses 3. 3 is a schematic configuration diagram of stereoscopic glasses 3. FIG. 3 is a schematic configuration diagram of a hardware configuration of stereoscopic glasses 3. FIG. It is a flowchart which shows the flow of a process of the control part of the spectacles 3 for stereoscopic vision. It is a figure explaining the process of the control part of the spectacles 3 for stereoscopic vision.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a diagram illustrating a state where a stereoscopic image displayed on the stereoscopic display device 100 is viewed using the stereoscopic glasses 1. The viewer 10 of the stereoscopic image wears the stereoscopic glasses 1 and stereoscopically displays the stereoscopic image displayed on the stereoscopic display device 100.

  The stereoscopic display device 100 is a parallax barrier type stereoscopic display device. The stereoscopic display device 100 is, for example, a television, and is installed at a distance (hereinafter referred to as an intermediate distance) between a distance (for example, 5 m or more) and a distance (for example, less than 30 cm). Here, the near means a distance such as reading or watching a monitor of a portable device. Further, the intermediate distance means a distance that is farther from near and closer than far, for example, 30 cm to 5 m.

  As shown in FIG. 2, the stereoscopic display device 100 includes a barrier 102 having strip-shaped slits arranged at equal intervals in the horizontal direction in front of the flat display device 101 such as a liquid crystal or an organic EL, so that the parallax can be obtained. The stereoscopic image which has is displayed. As shown in FIG. 2, the flat display device 101 has right eye strip image display areas 101 </ b> R and left eye strip image display areas 101 </ b> L arranged alternately. The number of the eye strip image display areas 101R and the left eye strip image display areas 101L shown in FIG. 2 is not limited to this, and the number of slits of the barrier 102 is not limited to this.

  As shown in FIG. 3A, the stereoscopic image is composed of a right-eye image and a left-eye image having parallax. An image obtained by cutting the right-eye image into a strip shape is displayed in the right-eye strip image display region 101R, and an image obtained by cutting the left-eye image into a strip shape is displayed in the left-eye strip image display region 101L. As shown in 3 (b), a stereoscopic display image in which right-eye images and left-eye images are alternately arranged is displayed on the flat display device 101.

  FIG. 4 is a diagram illustrating how the stereoscopic display image displayed on the flat display device 101 is visually recognized as a stereoscopic image. The image displayed in the strip image display area 101R for the right eye reaches the right eye, but does not reach the left eye because it is blocked by the barrier 102. Also, the image displayed in the left-eye strip image display area 101 </ b> L reaches the left eye, but does not reach the right eye because it is blocked by the barrier 102. As a result, with the right eye, only the image displayed in the strip image display area 101R for the right eye, that is, the image for the right eye can be seen, and with the left eye, only the image displayed in the strip image display area 101L for the left eye, that is, the image for the left eye. Can be seen. Since the right-eye image and the left-eye image have parallax, the viewer who sees the stereoscopic image recognizes the stereoscopic effect based on the parallax.

  FIG. 5 is a diagram illustrating how the stereoscopic effect is recognized when the viewer views the right-eye image and the left-eye image having parallax, and (a) recognizes the stereoscopic effect in the depth direction. In this case, (b) is a case where a feeling of depth and a feeling of popping out are not felt, and (c) is a case where a three-dimensional feeling in the protruding direction is recognized.

  As shown in FIG. 5B, when there is no parallax between the right-eye image and the left-eye image, the visually recognized subject A is recognized as being on the display surface of the display means. In this case, the convergence angle αb is an angle formed by the left and right lines of sight that intersect on the display surface.

  On the other hand, in FIG. 5A, the image for the right eye and the image for the left eye intersect the line connecting the right eye and the image for the right eye and the line connecting the image for the left eye and the left eye on the back side from the display surface. This is a case of having such parallax. In this case, the subject A forms an image behind the display surface, and the viewer recognizes the stereoscopic effect in the depth direction. In this case, the convergence angle αa is an angle formed by the left and right lines of sight that intersect at a virtual point located behind the display surface.

  FIG. 5C shows that the right-eye image and the left-eye image intersect the line connecting the right eye and the right-eye image and the line connecting the left eye and the left-eye image before the display surface. This is a case of having parallax. In this case, the subject A forms an image in front of the display surface, and the viewer recognizes the stereoscopic effect in the pop-out direction. The convergence angle αc in this case is an angle formed by the left and right lines of sight that intersect at a virtual point in front of the display surface.

  FIG. 6 is a perspective view of the stereoscopic glasses 1 that assist the viewer 10 when the viewer 10 views a stereoscopic image having such parallax. The stereoscopic glasses 1 mainly include a frame F and a right-eye lens 1R and a left-eye lens 1L attached to the frame F. In addition, since the frame F is the same as general spectacles, description is abbreviate | omitted.

  FIG. 7 is a cross-sectional view taken along the line AA of FIG. When the viewer 10 wears the stereoscopic glasses 1, the right eye lens 1 </ b> R is disposed in front of the viewer 10 right eye, and the left eye lens 1 </ b> L is disposed in front of the viewer 10 left eye.

  The right-eye lens 1R and the left-eye lens 1L are prism-shaped lenses that refract light in the horizontal direction. As shown in FIG. 7, the right-eye lens 1R and the left-eye lens 1L are prisms (base-in prisms) each having a base direction on the nose side.

  The strength of the prism is such that the refractive index is such that the line of sight is directed to the center of the right-eye image displayed on the stereoscopic display device 100 for the right-eye lens 1R, and is displayed on the stereoscopic display device 100 for the left-eye lens 3L. The refractive index is such that the line of sight is directed to the center of the left-eye image.

  As shown in FIG. 8 (a), when the viewer 10 does not wear the stereoscopic glasses 1, the wearer turns his eyes inward toward a point on the stereoscopic display device 100, and the convergence angle is α. It is necessary to perform congestion so that On the other hand, as shown in FIG. 8B, when the viewer 10 wears the stereoscopic eyeglasses 1, the prism action of the right eye lens 1R and the left eye lens 1L causes an inward refraction action. The line of sight is bent inward, and the viewer can see a point on the stereoscopic display device 100 with his eyes facing almost front.

  The refractive indexes of the right-eye lens 1R and the left-eye lens 3L are determined by performing an inspection at a store such as a spectacle store. In the inspection, a stereoscopic display device for inspection is installed at an intermediate distance (for example, a distance to the television that the viewer 10 normally views) according to the viewer, and the interval between the right eye and the left eye of the viewer 10 is set. This is done by measuring.

  The intensity of the prism is expressed by a prism diopter, and the intensity of the prism when the light passing through the prism lens is shifted by 1 cm on a vertical screen 1 m ahead is defined as one prism diopter. For example, when the distance between the viewer's eyes is 55 mm and the distance between the viewer's eyes and the stereoscopic display device 100 is 2.5 m, the center of the right-eye image and the center of the left-eye image are shifted by 5 mm. The right-eye lens 1R and the left-eye lens 1L use a prism of 1 prism diopter.

  In the above example, it is assumed that the viewer does not have a perspective or oblique position, but when the viewer has a perspective or oblique position, the strength of the prism is different from that when the viewer does not. In the case of the inner perspective and the inner oblique position, the strength of the prism is reduced, and in the case of the outer perspective and the outer oblique position, the prism strength is increased.

  According to the present embodiment, the right-eye lens and the left-eye lens are displayed on a television screen or a screen with almost no congestion by making the refractive indexes appropriate for stereoscopic viewing at an intermediate distance. It is possible to appreciate the stereoscopic image. Therefore, by assisting stereoscopic vision in this manner, stereoscopic vision becomes easy, and even when viewing a stereoscopic image continuously for a long time, eyestrain, eye fatigue, heavy eyes, double eyes Discomfort such as visibility can be reduced.

  In the present embodiment, the right-eye lens 1R and the left-eye lens 1L are prism lenses, but spherical surfaces may be formed in the right-eye lens 1R and the left-eye lens 1L according to the visual acuity of the viewer. For example, a lens having a prism shape and a shape such as a meniscus lens having a convex surface on the front surface and a concave surface on the back surface or a cylindrical lens may be used. As prescription data, in addition to the base directions of the right and left prisms and prism diopters, the left and right spherical power (S, unit: D), the left and right astigmatism power (C, unit: D), and the left and right astigmatic axis angles ( Ax, unit: °) and the like can be added.

  In the present embodiment, the right-eye lens 1R and the left-eye lens 1L have one prism, but the right-eye lens 1R and the left-eye lens 1L may have a plurality of prisms. For example, the center of the right-eye lens 1R and the left-eye lens 1L is a prism having a refractive index suitable for viewing a stereoscopic image displayed on a stereoscopic display device installed at an intermediate distance, and the right-eye lens 1R and the left-eye lens. Below 1L, a prism having a refractive index that matches the viewing of a stereoscopic image displayed on a stereoscopic display device installed nearby may be used.

  In the present embodiment, the parallax barrier type stereoscopic display device 100 is used. However, the stereoscopic display device 100 is not limited to the parallax barrier type. For example, a lenticular type monitor in which a lenticular lens having a semi-cylindrical lens group is arranged on the front surface can be used. Since the lenticular monitor is already known, the description thereof is omitted.

  In this embodiment, the lenses have the same prism strength when there is no perspective or oblique position, but the prism strength may be varied according to the viewer's ability for stereoscopic vision. For example, when the ability of the viewer for stereoscopic vision is measured when creating the stereoscopic glasses, and the ability for stereoscopic vision is high, the prism strength is set as the distance between the viewer's eyes and the distance to the stereoscopic display device. The refractive index is corrected so as to be weaker than the refractive index obtained based on the above. When the ability for stereoscopic vision is high, the prism strength is corrected to be stronger than the refractive index determined based on the distance between the viewer's eyes and the distance to the stereoscopic display device.

  As a measurement of the ability concerning stereoscopic vision, a method of performing a stereo test using a plurality of target images having different parallax angles (for example, 40 ″ to 3600 ″), or a target image having parallax is dedicated. A method is conceivable in which the time taken for stereoscopic vision is measured by separately displaying on polarized glasses or a monitor.

<Second Embodiment>
In the second embodiment, the refractive power of the prisms of the right-eye lens and the left-eye lens can be varied. Hereinafter, the stereoscopic glasses 2 according to the second embodiment will be described. The same parts as those of the stereoscopic vision glasses 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The stereoscopic glasses 2 mainly include a frame F1, and a right-eye lens 2R and a left-eye lens 2L attached to the frame F1. When the viewer 10 wears the stereoscopic glasses 2, the right-eye lens 2R is disposed in front of the viewer's 10 right eye, and the left-eye lens 2L is disposed in front of the viewer's 10 left eye.

  The frame F1 is provided with holes (not shown) through which adjustment knobs 25R and 25L projecting from the right-eye lens 2R and the left-eye lens 2L pass. Note that. Since the other structure of the frame F1 is substantially the same as that of the frame F, description thereof is omitted.

  As shown in FIG. 10, the right-eye lens 2R mainly includes prisms 21R and 22R, a holding member 23R to which the prism 21R is attached, a holding member 24R to which the prism 22R is attached, an adjustment knob 25R, and a connecting member. 26R. Since the left-eye lens 2L has the same configuration as the right-eye lens 2R, the right-eye lens 2R will be described below as an example.

  The prisms 21R and 22R constituting the right-eye lens 2R have substantially the same shape, and as shown in FIG. 11, a surface configured to be orthogonal to the surrounding cylindrical shape (hereinafter, this surface is referred to as a horizontal plane). ) Is a prism formed so that the other surface is inclined with respect to the horizontal plane when placed horizontally. Hereinafter, a surface formed to be inclined with respect to a horizontal plane is referred to as an inclined surface.

  The prisms 21R and 22R are provided such that the inclined surface of the prism 21R and the inclined surface of the prism 22R face each other and the horizontal surfaces of the prisms 21R and 22R face outward. The prisms 21R and 22R are provided so that the base of the prism 21R and the base of the prism 22R are opposite to each other.

  The holding members 23R and 24R are rotatably provided on the frame F1 via a shaft (not shown). The holding members 23R, 24R are attached to the outer peripheral surfaces of the prisms 21R, 22R or the vicinity of the horizontal surfaces of the prisms 21R, 22R. Bevel gears are formed on the holding members 23R and 24R.

  The connecting member 26R is rotatably provided on the frame F1. The connecting member 26R forms a bevel gear that meshes with the bevel gear of the holding member 23R and the bevel gear of the holding member 24R. Since the adjustment knob 25R is mounted on the shaft of the connecting member 26R, the connecting member 26R is rotated by rotating the adjustment knob 25R.

  When the connecting member 26R is rotated, the holding members 23R and 24R, that is, the prisms 21R and 22R are rotated in the reverse direction.

  With such a configuration, the stereoscopic glasses 2 can continuously change the refractive power of the right-eye lens 2R and the left-eye lens 3L. 12 to 14 are diagrams illustrating how the line of sight changes due to the rotation of the prisms 21R and 22R.

  As shown in FIG. 12, when one prism (for example, prism 21R) is located above the base and the other prism (eg, prism 22R) is located below the base, the apparent declination is ± 0. Therefore, even when the stereoscopic glasses 2 are worn, the direction of the line of sight does not change from when the stereoscopic glasses 2 are not worn.

  When the connecting members 26R and 26L are rotated via the adjustment knobs 25R and 25L so that the base of one prism (for example, the prism 21R) faces inward (inward of the base), the other prism (for example, the prism 22R) is rotated. The base of is also rotated inward. FIG. 13 illustrates the case where the bases of the prisms 21R and 22R are the most inward (that is, the deflection angle is maximum on the inward side). When the base is inward, an inward refraction action occurs, so the line of sight is bent inward, and when the viewer views the front in parallel, the line of sight of the right eye and the line of sight of the left eye intersect at a certain position.

  Conversely, when the connecting members 26R and 26L are rotated via the adjustment knobs 25R and 25L so that the base of one prism (for example, the prism 21R) faces outward (outside the base), the other prism (for example, The base of the prism 22R) is also rotated outward. FIG. 14 illustrates a case where the bases of the prisms 21R and 22R are most outward (that is, the deflection angle is maximum on the outward side). When the base is on the outside, a refraction action to the outside occurs, so that the line of sight is bent outward, and when the viewer views the front in parallel, the viewer cannot perform stereoscopic viewing.

  The adjustment knobs 25R and 25L are provided with a plurality of memories in the circumferential direction. The memory has a distance of 1 m, 2 m, etc., for example. The memory indicates the distance to the stereoscopic display device 100. For example, when the memory described as 1 m is in a standard position (for example, directly above), the prisms 21R, 22R, 21L, and 22L have the right eye and left eye distances from the line of sight of the right eye of a standard viewer. It is rotated to a position where the refractive index is such that the line of sight of the left eye intersects 1 m ahead. Similarly, when the memory described as 2.5 m is in the standard position, the prisms 21R, 22R, 21L, and 22L have the right eye and the left eye that have a standard interval between the right eye and the left eye. Is rotated to a position where the refractive index becomes such that it intersects 2.5 m ahead.

  Crossing here means that the lines of sight intersect when it is assumed that the center of the right-eye image and the center of the left-eye image coincide with each other for ease of explanation. Actually, the refractive index is calculated so that the right-eye lens 2R has a line of sight toward the center of the right-eye image, and the left-eye lens 3R has a refractive index so that the line of sight faces the center of the left-eye image. Only the center of the left-eye image is shifted.

  The viewer rotates the adjustment knobs 25R and 25L according to the distance of the stereoscopic display device to view. When the viewer visually recognizes the stereoscopic display device 100 at a distance of 2.5 m, the viewer rotates the adjustment knobs 25R and 25L so that the memory described as 2.5 m is at the standard position. The stereoscopic glasses 2 are worn.

  As a result, the line of sight is bent inward by the right-eye lens 2R and the left-eye lens 2L, and the viewer can see a point on the stereoscopic display device 100 that is 2.5 m away with the eyes almost facing the front. .

  According to the present embodiment, the refractive index of the right-eye lens and the left-eye lens is set to an appropriate refractive index simply by rotating the adjustment knob according to the distance of the stereoscopic display device to be viewed. The stereoscopic image displayed on the TV screen or the screen can be viewed without any problem. Therefore, by assisting stereoscopic vision in this manner, stereoscopic vision becomes easy, and even when viewing a stereoscopic image continuously for a long time, eyestrain, eye fatigue, heavy eyes, double eyes Discomfort such as visibility can be reduced.

  In the present embodiment, the right-eye lens 2R and the left-eye lens 2L use prisms having only horizontal refraction. However, if there is an oblique position such as an up-down oblique position, both the oblique positions are used. What is necessary is just to add the prism pair used as the direction which cancels (cancels). In addition, as in the first embodiment, a lens or a lens shape that corrects myopia, hyperopia, astigmatism, and the like can be added. Furthermore, as in the first embodiment, the prism strength may be corrected according to the viewer's ability regarding stereoscopic viewing.

<Third Embodiment>
In the third embodiment, the refractive powers of the prisms of the right-eye lens and the left-eye lens are automatically changed. Hereinafter, the stereoscopic glasses 3 according to the third embodiment will be described. In addition, about the part same as the stereoscopic spectacles 1 of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 15, the stereoscopic glasses 3 mainly include a frame F2, a right-eye lens 3R and a left-eye lens 3L attached to the frame F2, a distance measuring sensor 35, and a sensor 36. . When the viewer 10 wears the stereoscopic glasses 3, the right eye lens 3R is disposed in front of the viewer's 10 right eye, and the left eye lens 3L is disposed in front of the viewer's 10 left eye.

  A distance measuring sensor 35 is provided substantially at the center of the front surface of the frame F2. A sensor 36 (see FIG. 17) is provided on the back surface of the frame F2. Further, a power source 37 (see FIG. 17) such as a button battery can be attached to the frame F2. Since the other configuration of the frame F2 is the same as that of the frame F, description thereof is omitted.

  The distance measuring sensor 35 is an infrared sensor, for example, and measures the distance to the stereoscopic display device 100. The sensor 36 is an infrared sensor, for example, and applies a weak infrared light to the viewer's 10 eye, and detects the position of the black eye based on the difference in reflectance between the white eye and the black eye. As the infrared sensor used for the distance measuring sensor 35 and the sensor 36, a known device can be used.

  The right-eye lens 3 </ b> R and the left-eye lens 3 </ b> L are substantially cylindrical and have a variable refractive index (hereinafter referred to as an active lens). In the active lens, a polymer gel 32 is enclosed in an outer wall 31 formed of a transparent elastic material. Since the right-eye lens 3R and the left-eye lens 3L have the same configuration, the right-eye lens 3R will be described below as an example.

  16A is a plan view of the right-eye lens 3R, and FIG. 16B is a cross-sectional view taken along a plane that passes through the axis of the right-eye lens 3R and is parallel to the axis. Conductive layers 33 made of a transparent and elastic conductive material are formed on both end faces of the right-eye lens 3R. The conductive layer 33 is divided into a plurality of sections. Each of the divided conductive layers 33 is connected to a power source (not shown). When a voltage is supplied to the conductive layer 33, the refractive index is changed according to the voltage.

  FIG. 17 is a schematic diagram illustrating an electrical configuration of the stereoscopic glasses 3. The stereoscopic glasses 3 are mainly added to an eyeball position calculation unit 38a that calculates the eye interval of the viewer 10, a refractive index calculation unit 38b that calculates the refractive indexes of the right-eye lens 3R and the left-eye lens 3L, and an active lens. A control unit 38 including an active lens control unit 38c for controlling the voltage is provided. The control unit 38 is electrically connected to the distance measuring sensor 35, sensor 36, and power source 37. As a result, power is supplied to each unit, and data is exchanged between the units. The function of the control unit 38 will be described in detail later.

  FIG. 18 is a block diagram illustrating a hardware configuration of the stereoscopic glasses 3. The stereoscopic glasses 3 include a CPU (Central Processing Unit) 40 that centrally controls each unit, a memory 41 that stores various data in a rewritable manner, various programs, and nonvolatile data that stores data generated by the programs. A memory 42, a distance measuring sensor 35, a sensor 36, a power source 37, and a bus 43 for connecting them are provided. The control unit 38 can be realized by loading a predetermined program stored in the nonvolatile memory 42 into the memory 41 and executing it by the CPU 40.

  Each configuration is classified according to main processing contents in order to facilitate understanding of the configuration of the stereoscopic glasses 3. The present invention is not limited by the method of classifying the processing steps and the names thereof. Further, the processing of each functional unit may be executed by a single piece of hardware (such as an ASIC) or a plurality of pieces of hardware.

  The operation of the stereoscopic glasses 3 configured as described above will be described with reference to the flowchart shown in FIG.

  The eyeball position calculation unit 38a outputs an instruction to the sensor 36 to detect the position of the black eye, and acquires the detection result. The eyeball position calculation unit 38a obtains the center of the acquired black eye position for each of the right eye and the left eye, and calculates the distance between the centers as the viewer's eye interval L1 (step S10).

  The refractive index calculation unit 38 b issues an instruction to the distance measuring sensor 35 and acquires the distance to the stereoscopic display device 100 measured by the distance measuring sensor 35. Further, the refractive index calculation unit 38b issues an instruction to the sensor 36 and acquires the distance between the frame F2 and the black eye. And the refractive index calculation part 38b calculates the distance L2 of eyes and the stereoscopic display apparatus 100 by adding these. (Step S12). Note that the thickness of the frame F2 is much smaller than the distance L2, and thus can be ignored as an error.

  The refractive index calculation unit 38b acquires the eye interval L1 obtained in step S10 and the distance L2 between the eyes and the stereoscopic display device 100 acquired in step S12, and calculates the convergence angle α based on these. . Then, the refractive index calculation unit 38b calculates an angle α / 2 that is half of the convergence angle α as the refractive index of the right-eye lens 3R and the left-eye lens 3L (step S14).

  L1, L2, and α are in the relationship shown in FIG.

  In step S14, for the right-eye lens 3R, the center of the right-eye image displayed on the stereoscopic display device 100 is used as a reference point for calculating the convergence angle α, and for the left-eye lens 3L, the stereoscopic display device is used. The center of the left-eye image displayed at 100 is set as a reference point for calculating the convergence angle α. In FIG. 20, the center of the right-eye image and the center of the left-eye image are both displayed with the same black circle for the sake of simplicity.

  The active lens control unit 38c calculates a voltage to be supplied to the conductive layer 33 so that the refractive index calculated in step S14 is α / 2. As shown in FIG. 16, the conductive layer 33 is divided into a plurality of parts, and a voltage is calculated for each of the divided conductive layers 33. For example, the relationship between the refractive indexes of the right-eye lens 3R and the left-eye lens 3L and the voltage of each conductive layer 33 to be supplied is stored in the nonvolatile memory 42, and each conductive layer 33 is referred to by referring to this relationship. The voltage supplied to can be obtained.

  Then, the active lens control unit 38c converts the voltage of the power source 37 into the calculated voltage and supplies it to the conductive layer 33 in each room (step S16).

  According to the present embodiment, the refractive index of the right-eye lens and the left-eye lens is automatically set to an appropriate refractive index according to the distance of the stereoscopic display device to be viewed and the eye interval of the viewer. A person can view a stereoscopic image displayed on a television screen or a screen with little congestion by simply wearing stereoscopic glasses. Therefore, by assisting stereoscopic vision in this manner, stereoscopic vision becomes easy, and even when viewing a stereoscopic image continuously for a long time, eyestrain, eye fatigue, heavy eyes, double eyes Discomfort such as visibility can be reduced. In addition, in order to measure the distance of the stereoscopic display device to be viewed and the distance between viewers' eyes, we provide stereoscopic glasses with the optimal convergence angle depending on the scene (whether watching TV or watching movies) and the viewer can do.

  In the present embodiment, the right-eye lens 3R and the left-eye lens 3L have a refractive power in the direction of changing the convergence angle, but in addition to the change of the convergence angle, correction of myopia, hyperopia, astigmatism, and the like. Can also be done. Furthermore, as in the first embodiment, the prism strength may be corrected according to the viewer's ability regarding stereoscopic viewing.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included. .

  In addition to the stereoscopic glasses, the refractive index of the stereoscopic glasses including the right-eye lens and the left-eye lens having a variable refractive index is adjusted using the method described in the above embodiment. The method of doing is also included. Note that the stereoscopic glasses used when performing this adjustment method are not limited to the glasses described above, as long as they include a right-eye lens and a left-eye lens having a variable refractive index. For example, spectacles whose lenses can be exchanged with respect to the frame may be used, or a plurality of spectacles may be prepared in advance, and spectacles suitable for the viewer may be selected from among them.

  Furthermore, a plurality of embodiments can be combined. For example, in the second embodiment, the refractive index is adjusted by the viewer turning the adjustment knob by hand. However, the hardware configuration of the third embodiment is added to the second embodiment, and automatic operation is performed. The refractive index may be adjusted by turning the adjustment knob.

1, 2, 3: Stereoscopic glasses 1L, 2L, 3L: Left eye lens, 1R, 2R, 3R: Right eye lens, 21R, 22R: Prism, 23R, 24R: Holding member, 25R: Adjustment knob, 26R : Connecting member, 31: outer shell, 32: polymer gel, 33: conductive layer, 35: distance measuring sensor, 36: sensor, 37: power supply, 38: control unit, 38a: eye position calculation unit, 38b: refractive index Calculation unit, 38c: active lens control unit, 41: memory, 42: nonvolatile memory, 43: bus, 100: stereoscopic display device, 101: flat display device, 102: barrier

Claims (11)

Stereoscopic glasses equipped with a right-eye lens and a left-eye lens,
The right-eye lens and the left-eye lens are substantially near the center of a stereoscopic image display unit installed at an intermediate distance that is an intermediate distance between a distant place and a near place with respect to the wearer wearing the stereoscopic glasses. Stereoscopic eyeglasses characterized by having a prism having a refractive power (hereinafter referred to as an appropriate refractive power) so as to be directed to any point. The stereoscopic glasses according to claim 1,
The right-eye lens and the left-eye lens are lenses formed so that the refractive power of the prism can be adjusted,
First acquisition means for acquiring the intermediate distance;
Adjusting means for adjusting the refractive power of the right-eye lens and the left-eye lens based on the acquired intermediate distance so as to be the appropriate refractive power;
Stereoscopic glasses characterized by comprising: The stereoscopic glasses according to claim 2,
The right-eye lens and the left-eye lens include two prisms provided so that the bases are opposite to each other.
Stereoscopic eyeglasses characterized in that the adjusting means includes a mechanism for rotating the two prisms in opposite directions. The stereoscopic glasses according to claim 3,
The mechanism for rotating the two prisms in opposite directions is as follows:
A bevel gear provided on each of the two prisms;
A connecting gear for connecting the bevel gear;
A rotating means for rotating the connecting gear;
Stereoscopic glasses characterized by comprising: The stereoscopic glasses according to claim 2,
The right-eye lens and the left-eye lens are substantially cylindrical lenses in which a polymer gel is enclosed in an outer wall formed of a transparent elastic material, and conductive layers are formed on both end faces,
Stereoscopic eyeglasses characterized in that the adjusting means includes control means for controlling a voltage applied to the conductive layer. The stereoscopic glasses according to claim 5,
Second acquisition means for acquiring an interval between the right eye and the left eye of the wearer;
The stereoscopic glasses, wherein the adjusting means adjusts the refractive power of the right-eye lens and the left-eye lens based on the acquired distance between the right eye and the left eye. The stereoscopic glasses according to any one of claims 1 to 6,
The appropriate refractive power is corrected by the ability of the wearer regarding stereoscopic vision. A method for adjusting stereoscopic glasses comprising a right-eye lens and a left-eye lens having a variable refractive index,
Calculating a refractive power necessary for directing the wearer's line of sight to an arbitrary point in the vicinity of the approximate center of the stereoscopic image display means installed at an intermediate distance that is an intermediate distance between the far and near; and
Adjusting the right-eye lens and the left-eye lens to have the calculated refractive power;
A method for adjusting stereoscopic glasses, characterized by comprising: A method for adjusting stereoscopic glasses according to claim 8,
The stereoscopic image display means displays a stereoscopic image composed of a right-eye image and a left-eye image,
In the step of calculating the refractive power, for the right-eye lens, the center of the right-eye image displayed on the stereoscopic image display means is the arbitrary point, and for the left-eye lens, the stereoscopic image display means A method for adjusting stereoscopic glasses, characterized in that a refractive index is calculated with the center of the left-eye image displayed on the screen as the arbitrary point. A method for adjusting stereoscopic glasses according to claim 8 or 9,
The step of calculating the refractive power includes:
Measuring the position of the eye of the wearer;
Calculating the wearer's right eye and left eye based on the measurement result; and
A method for adjusting stereoscopic eyeglasses, comprising: The method for adjusting stereoscopic glasses according to any one of claims 8 to 10,
The step of calculating the refractive power includes:
Measuring the distance to the stereoscopic image display means;
Calculating the intermediate distance based on the measurement result;
A method for adjusting stereoscopic eyeglasses, comprising:

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