JP4399789B2 - 3D image viewing glasses - Google Patents

Description

  The present invention relates to viewing glasses in a three-dimensional image viewing system in which a left-eye image and a right-eye image are displayed side by side and a stereoscopic image is viewed by viewing images corresponding to both eyes.

  Many three-dimensional image appreciation systems for viewing a planar image in three dimensions using the parallax between the left eye and the right eye have been put into practical use so far. For example, a method of viewing a left-eye photograph and a right-eye photograph side by side and viewing them directly or through an optical system (parallel viewing method) is the oldest three-dimensional image viewing method. In recent years, a three-dimensional image viewing system for moving images in which a left-eye image and a right-eye image are displayed side by side on a single TV screen instead of this photograph has been studied. There is literature 1.

  In this patent document, the display screen is divided into left and right halves, the left eye (or right eye) image is displayed on the left side, and the right eye (or left eye) image is displayed on the right side. The stereoscopic image display device is provided with left and right image separation means such as a polarizing filter, and the left eye has only an image for the left eye. However, it is described that a stereoscopic image can be easily obtained by a configuration in which only the right-eye image is visible to the right eye.

Also, the appreciation of a three-dimensional image by the above parallel vision method requires eye adaptability such as adjustment of the viewing distance and some habituation until it looks three-dimensional. Patent Document 2 below proposes a stereo viewer that facilitates viewing of a three-dimensional image by using a progressive focus lens and a lens that bends the line of sight as an eyepiece.
JP-A-7-75136 Japanese Patent No. 2971958

However, the stereoscopic video display device of Patent Document 1 has a problem that the brightness of the screen is reduced to half or less because of the use of a polarizing filter.
Further, the eyepiece lens of the stereo viewer according to Patent Document 2 is always good for viewing a photograph that is always the same size and placed at a certain distance, but the size of the display screen is different from that for displaying an image on a television screen. Cannot be used for various viewing distances.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to easily realize stereoscopic viewing even if the display screen has various sizes and viewing distances without reducing the brightness of the image. 3D image viewing glasses that can be used.

In order to solve the above problems, the present invention provides 3D image viewing glasses having the configurations described in the following (1) to (3). That is,
(1) 3D image viewing glasses used for viewing a left eye image and a right eye image displayed side by side;
A convex lens whose optical axis is offset to the outside of both eyes of the viewer is combined with a concave lens whose optical axis is offset to the inside of both eyes of the viewer, and each optical axis of the convex lens and the concave lens is A lens for the left eye and a lens for the right eye , each movable independently within a range offset from both eyes ; and
3D image viewing glasses, characterized in that it comprises a light shielding plate which is fixed to the left eye side of the right eye and the right eye lens of the left eye lens.
(2) 3D image viewing glasses used for viewing a left eye image and a right eye image displayed side by side;
A convex lens in which the optical axis is offset to the outside of both eyes of the viewer and a concave lens in which the absolute value of the power is equal to or substantially equal to that of the convex lens and the optical axis is offset to the inner side of the viewer's eyes are combined. A left-eye lens and a right-eye lens whose positions can be adjusted left and right with the relative position of the concave lens and the fixed lens fixed.
3D image viewing glasses, comprising: light shielding plates fixed to the right eye side of the left eye lens and the left eye side of the right eye lens, respectively.
(3) The three-dimensional image viewing glasses according to claim 1 or 2, wherein the light shielding plate is provided with a boundary where a light shielding amount gradually changes in a light shielding region on a lens side.

  When viewing 3D images on a TV screen, anyone can easily make a bright and high-quality 3D image by simply adjusting the glasses used for viewing, regardless of the size of the TV. .

Hereinafter, three-dimensional image viewing glasses according to each embodiment of the present invention will be described with reference to the drawings.
FIGS. 1A and 1B are plan views showing the relationship between the lens position and screen of the viewing glasses according to the first embodiment of the present invention. FIG. 1A shows a case where the display screen is small, and FIG. When it is equal to the width, (c) is a case where the display screen is large. FIG. 2 is an explanatory diagram showing the lens position and the direction of the line of sight, where (a) is a convex lens, (b) is a concave lens, and (c) is a combination of a convex lens and a concave lens. FIG. 3 is a plan view for explaining the viewing distance. 4A and 4B are plan views for explaining viewing glasses having a configuration in which a convex lens and a concave lens are combined. FIG. 4A shows an example in which the concave lens is fixed and the convex lens can be adjusted, and FIG. 4B shows an example in which both lenses can be adjusted. FIG. 5 is a front view showing the lens and the light shielding plate, FIG. 6 is a front view of the light shielding plate in which the light shielding amount gradually changes, and FIG. 7 is a plan view for explaining the characteristics of the lens according to the second embodiment of the present invention. FIG. 8 is a plan view for explaining a structure in which a lens and a light shielding plate according to a second embodiment of the present invention are integrated.

First, a first embodiment of the present invention will be described with reference to FIGS.
The three-dimensional image viewing glasses in the first embodiment of the present invention are three-dimensional image viewing glasses used for viewing a left-eye image and a right-eye image displayed side by side, and each optical axis. A left-eye lens and a right-eye lens whose positions are adjustable, and a light-shielding plate that is installed in parallel in the vicinity of the left-eye lens and the right-eye lens and whose light-shielding width is adjustable left and right. is there.

In FIG. 1, (a), (b), and (c) each show a state in which the relationship between the screen size and the viewer's eye width is different.
FIG. 1A shows a case where the image interval between the displayed left and right images 10 is small with respect to the distance (eye width) between the left eye 13a and the right eye 13b of the viewer. In this case, the left and right lens positions are adjusted so that the optical axes (lens centers) of the lenses 11a and 11b are inside the eye width, as shown in the figure. By doing this, the visible image opens to the outside, so that the left and right images can be viewed as if they were looking away, not close. Moreover, since the lens to be used is a convex lens, there is also an enlargement effect like a loupe. If you want to see a larger image, you can increase the lens power.

  FIG. 1B shows a case where the image intervals of the left and right images 14 displayed with respect to the viewer's eye width are substantially equal. In this case, as shown in the figure, the distance between the optical axes of the lenses 11a and 11b is adjusted to be the same as the eye width, and the viewer views the left and right images with the respective eyes using the center of the lens.

FIG. 1C shows a case where the image interval between the left and right images 15 displayed with respect to the viewer's eye width is large. In this case, as shown in the figure, the position is adjusted so that the distance between the optical axes of the lenses 11a and 11b is outside the eye width.
Since the lens has a finite size, it will come off the eye if it is too wide. If the left and right images are not visible at the same time, even if they are opened to the extent that they deviate, they can be seen by increasing the distance from the screen. This countermeasure will be described with reference to FIG.
The light shielding plate 12 described between the left and right lenses in FIGS. 1A, 1B, and 1C will be described later.

As shown in FIG. 2A, when the optical axis of the convex lens 21 is shifted to the right with respect to the viewer's eye 23, the visible image 20 can be seen on the right side in front. That is, the image shifts to the left. Further, as shown in FIG. 2B, when the optical axis of the concave lens 22 is shifted to the right with respect to the viewer's eye 23, the left side of the convex lens can be seen in front. That is, the image shifts to the right.
In this way, the image that is visible when both lenses shift the optical axis with respect to the eye 23 is shifted.

Furthermore, as shown in FIG. 2C, if the two concave and convex lenses 22 and 21 are combined and shifted in the opposite directions, the overall lens power is not increased and a large shift amount can be obtained.
By applying this effect to the left and right lenses of the viewing glasses, it is possible to bring the left and right images at a distance considerably wider than the eye width without moving the focus position toward the inside of the eye width.

  Next, the relationship between the viewing distance and the lens shift effect will be described. As shown in FIG. 3, the angle α at which the center between the left and right images of the display image 30 is viewed varies depending on the distance from the screen. Therefore, if the shift amount by the lens is constant, the viewer 31 must change the distance between himself and the screen according to the size of the display screen 30, and move to the position of the viewer 31 'in FIG. No longer. Even in such a case, it is advantageous to provide a viewing lens with a lens adjustment mechanism so that stereoscopic viewing can be performed at a position desired by the viewer.

FIG. 4 shows an example of viewing glasses combined with concave and convex lenses suitable for viewing left and right images that are wider than the eye width. FIG. 4A shows the positions of the convex lenses 41a and 41b that can be varied, and concave lenses 42a and 42b. Is fixed. In this case, the concave lens has a role of canceling out the power of the convex lens and reducing aberration.
(B) is a configuration in which the convex lenses 41a and 41b and the concave lenses 42a and 42b can be varied independently. In this case, the shift amount becomes larger as both lenses move in the opposite directions. In the case of viewing left and right images that are wider than the distance between the eyes, the image shift direction by the lens is only inward, so it is not necessary to use the entire surface of the lens as shown in FIG. It is also possible to cut and use each as a left and right lens. At this time, if the optical axis of the convex lens is on the outside and the optical axis of the concave lens is on the inside, a large shift can be obtained.

  In the lens configuration of FIG. 4B, as an example, on a 36-inch wide television, when the viewing distance is about 1 m, the lens power is +3 to +3.5 for the convex lens and −3 to −3.5 for the concave lens. When a 65 mm diameter lens was used, the offset amount of the optical axis of both lenses was optimally about 30 mm.

Next, the light shielding plate 43 shown in FIGS. 4A and 4B will be described.
If the viewer is not accustomed to 3D image viewing, the adjacent image can be seen from the gap between the two lenses of the glasses or through the lens, and overlaps with the regular 3D image viewed through the lens. The light shielding plate 43 reduces this interference.
As shown in the drawing, the light shielding plate 43 is configured by arranging a light shielding plate having a structure that expands and contracts to the left and right between the concave lenses 42a and 42b.
When the viewer finishes adjusting the position of the lens, the viewer next moves the light shielding plate 43 left and right so that the adjacent screen cannot be seen. Since the optimum state differs depending on the eye width of each viewer and the wearing state of the glasses, it is desirable to adjust each time.

FIG. 5 is a view of the lens and the light shielding plate when viewed from the front.
In the figure, the light shielding plate is divided into two parts 43a and 43b, and each has a structure that can slide left and right separately from the lenses 42a and 42b, and the width d can be adjusted.
The light shielding plates 43a and 43b may be any member that does not transmit light, but a black member or the like that absorbs light is suitable so that the presence of the light shielding plates 43a and 43b does not matter.

Further, as shown in FIG. 6, the light shielding state on the lens side of the light shielding plates 43a and 43b is preferably provided on the light shielding plate 60 with a boundary where the light shielding state gradually changes with a width A. In this way, by gradually changing the amount of light shielding, it is possible to reduce the sudden appearance of the light shielding portion in the field of view.
The width A is slightly different depending on the size of the display screen and the viewing distance, but has an optimum value in the range of 2 to 10 mm.

By using such a light shielding plate, even an inexperienced viewer can appreciate a good three-dimensional image without being disturbed by adjacent images.
In this embodiment, the light shielding plate 43 is installed between the viewer and the lens. However, the present invention is not limited to this and may be arranged on the display screen side of the lens.

By the way, in the description of the shift amount in FIG. 2C, when the absolute values of the powers of the concave lenses 42a and 42b and the convex lenses 41a and 41b are equal or almost equal (the difference is up to about 0.5), the shift of both lenses is performed. Since the moving direction with respect to is opposite, the shift amount remains constant when both lenses are moved together, and the feature is that the image being viewed does not move.
FIG. 7 shows this state. When the viewer's eye 23 is moved to 23 ', the visible image 20 only moves in parallel to 20', so the viewpoint does not move relatively.
This characteristic means that it is not necessary to adjust the width of both lenses each time according to the eye width of the viewer. Therefore, it can be seen that when the display screen size and viewing distance are limited to some extent and it is not necessary to change the shift amount, it is easy to use as a pair of viewing glasses by using such a combination of lenses. In this case, it is possible to provide viewing glasses having a structure in which the width of the light shielding plate is adjusted with priority.

  Therefore, the 3D image viewing glasses according to the second embodiment of the present invention are 3D image viewing glasses used for viewing a left eye image and a right eye image displayed side by side on the left and right sides. Are combined with a convex lens that is offset to the outside of the viewer's eyes and a concave lens whose absolute power is equal to or substantially equal to that of the convex lens and whose optical axis is offset to the inside of the viewer's eyes. The left-eye lens and right-eye lens whose positions can be adjusted to the left and right with the relative position fixed are fixed to the right-eye side of the left-eye lens and the left-eye side of the right-eye lens, respectively. A light shielding plate.

  In FIG. 8, the left-eye lens is a combination of a convex lens 81a and a concave lens 82a, and the right-eye lens is a combination of a convex lens 81b and a concave lens 82b as shown in the figure. The concave and convex lenses are integrated, and the light shielding plates 83a and 83b are fixed to the concave and convex lenses, respectively.

When using glasses with such a structure, the viewer simply adjusts the left and right shading plate-integrated lenses to the left and right so that adjacent images are not visible. As a result, the shift amount in the line-of-sight direction does not change, so that readjustment of the lens position is unnecessary.
In addition, it is effective to provide the light shielding plates 83a and 83b used here with a boundary where the light shielding state gradually changes.

FIG. 4 is a plan view showing the relationship between the lens position of the viewing glasses according to the first embodiment of the present invention and the screen, where (a) is a small display screen, and (b) is the distance between the left and right screens equal to the eye width. In the case (c), the display screen is large. It is explanatory drawing which showed the lens position and the direction of a line of sight, (a) is a convex lens, (b) is a concave lens, (c) is a case where a convex lens and a concave lens are combined. It is a top view explaining a viewing distance. It is a top view explaining the spectacles of a structure which combined the convex lens and the concave lens, (a) is an example in which a concave lens is fixed and a convex lens can be adjusted, (b) is an example in which both lenses can be adjusted. It is the front view which showed the lens and the light-shielding plate. It is a front view of the light-shielding plate from which the light-shielding amount changes gradually. It is a top view explaining the characteristic of the lens which concerns on the 2nd Example of this invention. It is a top view explaining the structure which integrated the lens and light-shielding plate which concern on the 2nd Example of this invention.

Explanation of symbols

10. Left and right image (small), 11a ... Lens (for left eye), 11b ... Lens (for right eye), 12 .... Light-shielding plate, 13a ... Left eye, 13b ... Right eye, 14 .... Left / right image (middle), 15. Right / left image (large), 20 .... Visible image, 21 ... Convex lens, 22 .... Concave lens, 23 ... Viewer's eye, 30 ... Display image, 31 ... Viewer 40a, 40b, visible image, 41a, 41b, convex lens, 42a, 42b, concave lens, 43, 43a, 43b, shading plate, 44, viewer 60, shading plate, 80a, 80b Visible image, 81a, 81b, convex lens, 82a, 82b, concave lens, 83, shading plate, 84, viewer

Claims (3)

3D image viewing glasses used for viewing a left eye image and a right eye image displayed side by side;
A convex lens whose optical axis is offset to the outside of both eyes of the viewer and a concave lens whose optical axis is offset to the inside of both eyes of the viewer are combined, and each optical axis of the convex lens and the concave lens is A lens for the left eye and a lens for the right eye , each movable independently within a range offset from both eyes ; and
3D image viewing glasses, characterized in that it comprises a light shielding plate which is fixed to the left eye side of the right eye and the right eye lens of the left eye lens. 3D image viewing glasses used for viewing a left eye image and a right eye image displayed side by side;
A convex lens in which the optical axis is offset to the outside of both eyes of the viewer, and a concave lens in which the absolute value of the power is equal to or substantially equal to that of the convex lens and the optical axis is offset to the inside of the viewer's eyes, are combined. A left-eye lens and a right-eye lens whose positions can be adjusted left and right with the relative position of the concave lens and the fixed lens fixed.
3D image viewing glasses, comprising: light shielding plates fixed to the right eye side of the left eye lens and the left eye side of the right eye lens, respectively.   The three-dimensional image viewing glasses according to claim 1, wherein the light shielding plate has a boundary where a light shielding amount gradually changes in a light shielding region on a lens side.

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