JPH01284091A - Stereoscopic television reproducing device and its variable focus shutter spectacles - Google Patents

Abstract

PURPOSE:To reduce the fatigue of eyes of an observer and to make the size of device small by varying relatively a distance between a display face and the observer through a position correction means and using a display means so as to adjust and display the size and display position of a video image on the display face in response to the fluctuation of the distance. CONSTITUTION:A display base 15 is run on rails 17, 17 by the drive of its drive motor based on a display moving signal D from a stereoscopic video image source 11. Thus, the mechanical distance l is fluctuated and the video image is made coincident at the stereoscopic position. Thus, right/left video images R, L of a house and right/left video images R, L of a mountain are reduced by a display correction means and the right/left video images R, L of the house are made coincident by approaching them and the right/left video images R, L of the mountain are parted. Then the size and display position of the right/left video images R, L of the house and mountain are adjusted. Then at the reproduction of a stereoscopic image, the observer can focus its eyes by a simple means.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stereoscopic television playback device and variable focus shutter glasses for the same, and specifically relates to a stereoscopic television playback device and variable focus shutter glasses for the same.
High-Density Disk 5yste+a
) is used in recording and reproducing devices, etc., and is used in playback devices and playback devices that display images captured from multiple viewpoints on the display surface of a 3D display device to give an observer a 3D view, and the display surface of a 3D display device. This invention relates to variable focus shutter glasses that vary the optical distance between the camera and the viewer.

[Conventional technology]

A 3D television playback device used in a VHD recording/playback device, etc. plays back the insurance signals individually with two cameras corresponding to the left and right eyes, and the image from the left camera is shown only to the left eye, while the right camera If you observe the image with your right eye only, you can obtain a three-dimensional image.

For example, a specific example of a conventional stereoscopic television playback device is shown and explained in FIGS. 11 and 12. The stereoscopic television playback device (1) is a display device ( 2), shutter glasses (3) worn by an observer, and a stereoscopic video source (3) that sends a stereoscopic video signal (A) and a shutter glasses control signal (B) to the display device (2) and the shutter glasses (3). 4). When playing back this stereoscopic image, the display surface (2a) of the display device (2) as shown in FIG.
), a left-eye image (L) and a right-eye image (R) are displayed alternately with their positions shifted by a stereoscopic image signal (A) from a stereoscopic image source (4). On the other hand, on the observer's (H) side, the shutter glasses (CB) from the stereoscopic image source (4) are used to control the shutter glasses (CB) according to the left and right eye images (L) and (R) on the display surface (2a). 3) and display the left eye image (L) [right eye image (R)] on the display surface (2a).
is displayed, the left eye (HL) of the observer (H)
[I can see it with my right eye (H,)). For the observer (H), the image appears at a position (Po) in front of the display surface (2a) based on the convergence and parallax of the left and right eyes (HL) (H,''), resulting in a sense of perspective. It is possible to visualize stereoscopically by
11533), in the above example, the observer (H)
This is a type of stereoscopic television playback device (1) that uses lenticular lenses (3), but there are also types that use lenticular lenses (e.g.,
Publication No. 8451).

There is also a type of stereoscopic television reproduction device (5) that uses a variable focus mirror without using shutter glasses. This consists of a display device (6) fixedly arranged as shown in FIG. 13, the display device (6) and an observer (
A varifocal mirror (7) is arranged to face H) in a predetermined positional relationship, and a stereoscopic video signal (A) and a focus movement signal (C) are sent to the display device (6) and the varifocal mirror (7). and a stereoscopic video source (8) that sends out images. When playing back the stereoscopic video, the stereoscopic video signal (A) from the stereoscopic video source (8) displays the video on the display surface (6a) of the display device (6), while the stereoscopic video source (8) displays the video on the display surface (6a) of the display device (6).
) is used to mechanically drive the variable focus mirror (7) in synchronization with the image display on the display surface (6a), thereby moving the display surface (6a) and the viewer (
By varying the optical distance between the monitor and the display surface (6a) according to the image displayed on the display surface (6a), the viewer (H) can view the image stereoscopically (for example, Japanese Patent Publication No. 48-38432).

[Problems to be Solved by the Invention] By the way, the type using shutter glasses (3) as disclosed in Japanese Patent Publication No. 52-11533 and the lenticular lens as disclosed in Japanese Patent Publication No. 61-38451 In the stereoscopic television playback device (1) of the type that uses In addition, the image is viewed stereoscopically by shifting the distance in the left and right direction of the image. Therefore, the position where the observer (H) focuses both left and right eyes (HL) (Hll), that is, the display device (2)
Since the display surface (2a) of the display screen (2a) and the display surface (Po) where the image is viewed stereoscopically for the observer (H) are different,
There is a problem in that the observer (H)'s eyes become easily fatigued due to the situation being unnatural.

On the other hand, in a type of stereoscopic television playback device (5) using a variable focus mirror (7) as disclosed in Japanese Patent Publication No. 48-38432, an observer (H) has both left and right eyes (HL).
(HR) focus position and the above observer (
Since the position at which the image is viewed stereoscopically matches H), the observer's (H) eyes will not become easily fatigued. However, if the observer (H)
In order to view the image in a) stereoscopically, it is necessary to drive the variable focus mirror (7) at high speed and display the image at high speed on the display surface (6a) in synchronization with this, which requires the structure of the device. The problem was that it became complicated and large.

The present invention was proposed in view of the above-mentioned problems.The purpose of the present invention is to provide a simple structure in which images are viewed stereoscopically at the position where the observer focuses his or her eyes. An object of the present invention is to provide a stereoscopic television playback device and variable focus shutter glasses for the stereoscopic television playback device that can match the positions of the three-dimensional television.

[Means to solve the problem]

In order to achieve the above object, the stereoscopic television playback device of the present invention displays images captured from a plurality of viewpoints on the display surface of the stereoscopic display device, and allows the viewer to see the stereoscopic images using the binocular convergence and binocular disparity. The playback device comprises a position correction means for relatively changing the distance between the display surface of the stereoscopic display device and the viewer, and a size and display position of the image on the display surface according to the change in the distance. and display correction means for adjustment.

Further, the variable focus shutter glasses used in the stereoscopic television playback device are worn by the viewer to change the optical distance from the display surface of the stereoscopic display device. A pair of left and right liquid crystal shutters that are placed in front of the camera and that alternately switch between the two eyes, a pair of left and right liquid crystal lenses that are placed in front of the liquid crystal shutters and whose refractive index changes depending on the applied voltage, and a pair of left and right liquid crystal lenses that are placed in front of the liquid crystal lenses. It consists of a pair of left and right correction lenses that adjust the convergence angle of both the left and right eyes.

[Effect]

In the stereoscopic television playback device according to the present invention, when playing back a stereoscopic image, the distance between the display surface and the viewer is relatively changed by the position correction means, and the distance between the display surface and the viewer is adjusted relative to the position where the viewer's eyes are focused. The image is matched with the position where the image is viewed stereoscopically, and accordingly, the image on the display surface is enlarged or reduced by the display correction means, and the image is moved left and right to adjust the size and display position of the image.

In addition, in the variable focus shutter glasses of the present invention, a liquid crystal shutter alternately switches the left and right eyes of the observer according to the image on the display, and a liquid crystal lens changes the focus by changing the refractive index based on the applied voltage, Further, a correction lens is used to adjust the convergence angle of the observer's left and right eyes.

〔Example〕

Embodiments of a stereoscopic television playback device and variable focus shutter glasses thereof according to the present invention will be described with reference to FIGS. 1 to 10.

FIG. 1 shows a first embodiment in which the present invention is applied to a two-lens three-dimensional display device using shutter glasses. The position correction means in the stereoscopic television reproducing apparatus in this first embodiment is a specific example of changing the mechanical distance between the display surface of the stereoscopic display apparatus and the viewer.

The 3D television playback device (10) shown in Fig. 1 shows the 3D image source (11) and the 3D image source (12).
11) is an electrically connected two-lens stereoscopic display device, and (13) is shutter glasses that are electrically connected to the stereoscopic image source (11) and worn by the viewer (H).
(14) is the mechanical distance (1) between the display surface (12a) of the display device (12) and the observer (H)
This position correcting means (14)
), (15) is a stereoscopic display device (12)
is placed on a display stand with its display surface (12a) facing the viewer (I()), and a drive motor (not shown) rotates wheels (16) (16)... provided at the bottom of the display stand. ).The drive motor is electrically connected to the stereoscopic image source (11).(17)
) (17) is a display moving rail laid along the front and back direction with respect to the observer (H), on which the display stand (15) is mounted so as to be freely movable. Furthermore, (18
) is a display correction means to be described later.

When playing the 3D video, first the 3D display device (
12) and the observer (H) are set in an optimal initial positional relationship. That is, either the observer (H) is fixedly located at an optimal initial position with respect to the stereoscopic display device (12), or the observer (H) is not connected to the stereoscopic display device! (1
2), contrary to the above, the stereoscopic display device (12) is moved to the optimal initial position (P, ) with respect to the observer (H) by remote control operation etc. and place it in a fixed position. From this state, the 3D display device is activated by the 3D video signal (A) from the 3D video fi (11)! (12) A left eye image (L) and a right eye image (R) are alternately displayed on the display surface (12a) with their positions shifted. on the other hand,
On the observer (H) side, a shutter glasses control signal (B) is synchronized with the stereoscopic video signal (A) from the stereoscopic video source (11).
) to switch the shutter glasses (13) according to the images (L) and (R) for the left and right glasses on the display surface (12a),
The observer (H) views the left eye image (L) (right eye image (R)) on the display surface (12a) with the left eye (HL) (right eye (
By viewing with the left and right eyes (HL)
Based on the convergence and parallax of (H*), for example, the image on the display surface (12a) is
) than the observer (H) who appears to be in a forward position (Po)
views the above image stereoscopically. At this time, the stereoscopic image source (1
Based on the display movement signal (D) from 1), the display stand (15) is moved on the rail (17) by the operation of its drive motor, and the display surface (12a) of the three-dimensional display device (12) is moved. is moved from the initial position (PI) to the forward position (Po).

This allows the display surface (12a) and the viewer (H
) changes, and the observer ()f) is +11 on both the left and right sides! The position of the display surface (12a) to focus on (HL) (He) and the observer (H)
The position at which the image is viewed stereoscopically matches the position where the image is viewed stereoscopically.

In the above case, the position where the image is viewed stereoscopically is the front position (Po) of the display surface (12a), but the position where the image is viewed stereoscopically is the front position (Po) of the display surface (12a).
2a), and in this case, the display surface (
12a) to the above-mentioned rear position.

The display surface (
12a) and the observer (H), it is necessary to adjust the size and display position of the image on the display surface (12a). This display correction on the display surface (12a) will be explained below based on FIGS. 2(a) and 2(b). In addition, FIG. 2(a) shows the display surface (12a) at the initial position (Pl), and FIG. 2(b) shows the display surface (12a) at the front position (Po).
12a), and the dashed line in each figure is the left eye image (L).
(hereinafter simply referred to as the left image), the solid line part is the right eye image (R)
(hereinafter simply referred to as a stone statue). First, on the display surface (12a) at the initial position (P,), the display surface (12a) shown in Fig. 2 (
As shown in a), for example, the left image of the house (L) is on the right,
By placing the stone statue of a house (R) shifted to the left, the house appears to be in front of the display surface (12a), and conversely, the left statue of a mountain (L) is placed on the left, By disposing the mountain stone statue (R) shifted to the right, the mountain appears to be located behind the display surface (12a). When the display surface (12a) is moved from this state from the initial position (P+) to the forward position (Po) as described above, as shown in FIG.
), the left and right images of the house (L) and (R) and the left and right images of the mountain (
While reducing L)(R), the left and right images of the house (L)(R)
) are brought closer to match, and the left and right images (L) and (R) of the mountain are moved away, thereby adjusting the size and display position of the left and right images (L) and (R) of the house and the mountain. In the above case, correction was made so that the image of the house was in focus, but this was corrected so that the image of the house was in focus.
It is automatically set based on the output from the stereoscopic image source (11) according to the image in a). As mentioned above, the position where the image is viewed stereoscopically is the rear position of the display surface (12a), and when the display surface (12a) is moved from the initial position (Pl) to the rear position, the display surface ( The image in step 12a) is enlarged and the display position is adjusted based on the image to be focused.

The concrete two sides of the display correction means (18) during the above-mentioned three-dimensional image reproduction are shown in FIGS.
It is shown and explained in a) and (b).

First, one display correction means (18) is shown in FIG.
a) A stereoscopic display device (12) as shown in (b)
There is a means for modulating the scanning signal supplied to the. Specifically, as shown in FIG. 3(a), a stereoscopic display device (1
2) display surface (12a) is at the initial position (P
+), the vertical and horizontal scanning signals (S, )(
S, ) has the same amplitude (dυ (d8)) on the positive and negative sides centering on the voltage line (0) (0), and as mentioned above, the display surface (12a) is moved from the initial position (P+). When the position is corrected by moving to the front position (P, ), the vertical scanning signal (S+'') is centered around the zero volt line (0) as shown in FIG. 3(a), as shown in FIG. 3(b). The display surface (12a) is modulated to a smaller amplitude (d+°) than the vertical scanning signal (S,).
The left and right images (L) and (R) at are reduced. In addition, the horizontal scanning signal (SZo) is converted to the third signal as well as the vertical scanning signal (Sl').
The amplitude (d
x') and further apply bias voltages to the plus side and minus side in the left and right image portions, respectively, to shift the left and right images to reduce the left and right images on the display surface (12a) and adjust the position in the horizontal direction.

Next, as another display correction means (18), there is a means using a display memory as shown in FIGS. 4 and 5(a) and (b). Specifically, as shown in FIG. 4, a display memory (19) that is a digital or analog memory, and write and read address generation circuits (20) (21) that specify addresses to this display memory (19) are used. Become. In this display correction means (18), when playing a stereoscopic image,
Using the stereoscopic video signal (A) from the stereoscopic video source (11), video data on the display surface (12a) shown in FIG. 2(a) is stored pixel by pixel in the display memory (19).

At this time, the write address signal (E) shown in FIG. 5(a) is input to the display memory (19) based on the stereoscopic video signal (A) by the write address generation circuit (20), and the video data is written. Specify the address. Then, when the position of the display surface (12a) is corrected, display data is transferred from the display memory (19) to the stereoscopic display device! Output to (12). At this time, the readout address signal (G) shown in FIG. 1(b) is input to the display memory (19) based on the display position detection signal CF) by the readout address generation circuit (21), and thereby the display Specify the read address of the video data in the memory (19) and display the left and right images of the video (reduced and adjusted in position) on the display surface (12a).

In the above example, the position where the image is viewed stereoscopically is the front position (PO2) of the display surface (12a), but the position where the image is viewed stereoscopically is the rear position of the display surface (12a). In this case, by reversely operating the display correction means (18), the image on the display surface (12a) is enlarged and the image is
Adjust the position.

In the first embodiment described above, the present invention is applied to a two-lens stereoscopic display device using shutter glasses, but the present invention is not limited to this, and the following embodiments are applicable to the present invention. is also applicable.

First, as in the first embodiment, the position corrector 11ffi
(18) is the display surface (12a) and the observer (H)
There is a stereoscopic television playback device (22) shown in FIG. 6 as a device that changes the mechanical distance between Multi-view stereoscopic display device (2
4) to which the present invention is applied, the stereoscopic display device (24) electrically connected to the stereoscopic image source (11) and the display correction means (18) is connected to its display surface (24a).
Place it on the display stand (15) facing the observer (H), and place it on the rail (17) (17).
) so as to be movable in the front-back direction. Note that the position correction and display correction in this second embodiment are the same as those in the first embodiment.
This is similar to the embodiment.

Next, unlike the first and second embodiments, the three-dimensional television reproducing apparatus shown in FIGS. 7 and 8 assumes that the position correction means changes the optical distance between the display surface and the viewer. There are (25) and (26).

First, the third embodiment shown in FIG. 7 is an example in which the present invention is applied to a three-dimensional display device (28) using a variable focus mirror (27) that utilizes light reflection. (1
1) and a stereoscopic display device (28) electrically connected to the display correction means (18) is fixedly arranged, and a variable focus mirror (27) electrically connected to the stereoscopic image source (11).
are arranged to face the display surface (28a) of the stereoscopic display device (28) and the viewer (H) in a predetermined positional relationship. When reproducing stereoscopic images, the variable focus mirror (27) is driven to display the display surface (28a).
While changing the optical distance between the camera and the observer (H), the display correction means (18) corrects the display of the image on the display surface (28a) in the same manner as in the first and second embodiments. At this time, the variable focus mirror (27) is connected to the stereoscopic display device (28).
Since it is used in combination with the optical distance to vary the optical distance, it is not necessary to drive at high speed. Further, the stereoscopic display device (28) can be of a two-lens type or a multi-lens type, and in the case of two eyes, shutter glasses are used.

Next, in the fourth embodiment shown in FIG. 8, the present invention is applied to a two-lens stereoscopic display device (30) using variable focus shutter glasses that utilize light refraction. 11) and display correction means (18) is fixedly arranged with its display surface (30a) facing the observer (H), and the stereoscopic image source ( An observer (H) wears variable focus shutter glasses (29) that are electrically connected to 11). When playing stereoscopic images, the variable focus shutter glasses (29)
The optical distance between the display surface (30a) and the viewer (H) is varied by the focus variable function of Correct the display of the image.

Two specific sides of the variable focus shutter glasses (29) used in the fourth embodiment are shown and explained in FIGS. 9 and 10.

Variable focus shutter eye 11 shown in FIGS. 9 and 10 (
29) C. It is placed in front of the observer's left and right eyes (HL) (HR), and the stereoscopic image source (H,) is placed in front of the observer's left and right eyes (HL) (HR).
A pair of left and right liquid crystal shutters (31) which are alternately switched by the variable focus shutter glasses control signal (I) from 11).
(31) and a liquid crystal shutter (31) disposed in front of (31), the variable focus shutter glasses control signal (I)
A pair of left and right liquid crystal lenses (32) (32) whose refractive index varies and the focal point is variable, and the liquid crystal lens (32)
) (32), and both left and right eyes (HL) (
A pair of left and right correction lenses (3
3) Consists of (33). The above LCD shutter (
31) (31) is the first polarizing plate (34) (3
4), first glass plate with transparent electrode (35) (35)
, shutter liquid crystal layer (36) (36), second glass plate with transparent electrode (37) (37), and second
The polarizing plates (38) (38) are sequentially laminated.

In addition, liquid crystal lenses (32) (32) are
Publication No. 2-129813 and JP-A-62-129816
As stated in the publication, the first and second glass plates with transparent electrodes (
39) (39), (40) (40) have a structure in which a lens liquid crystal layer (41) (41) is sandwiched between them.

The difference between the variable focus shutter glasses (29) in FIG. 9 and the variable focus shutter glasses (29) in FIG. 10 is that the liquid crystal lens (32) (32) and the correction lens (33)
It has the shape (33). In the variable focus shutter glasses (29) shown in Fig. 9, the front surfaces of the liquid crystal lenses (32) (32) and the rear surfaces of the correction lenses (33) (33) are formed with a curvature having two center points on each side. In contrast, in the variable focus shutter glasses (29) shown in Fig. 10, the front surface of the liquid crystal lens (32) (32) and the rear surface of the correction lens (33) (33) are common to the left and right sides. It is a curved surface formed by curvature with one center point. Therefore, the variable focus shutter glasses (29) shown in FIG. 10 can reduce the parallax between the left and right eyes (HL) (HR) of the observer (H) as much as possible, and are easier to use. This is preferable because it approximates the natural state.

〔Effect of the invention〕

According to the present invention, when playing back a stereoscopic image, the position where the viewer's eyes focus and the position where the image is viewed stereoscopically can be matched by a simple means, thereby reducing eye fatigue of the viewer. Therefore, it is possible to provide a 3D television playback device with a simple structure and high safety.

Further, when the variable focus shutter glasses of the present invention are used in the stereoscopic television reproduction apparatus, a natural and good stereoscopic image can be obtained for the viewer.

[Brief explanation of the drawing]

1 to 10 are for explaining embodiments of a stereoscopic television playback device and its variable focus shutter glasses according to the present invention, and FIG. 1 shows a first embodiment of the stereoscopic television playback device. Figures 2(a) and 2(b) are front views showing images at the initial position and front position on the display surface, and Figures 3(a) and (b) are three-dimensional views at the initial position and front position. A characteristic diagram showing a scanning signal supplied to a display device, FIG. 4 is a block diagram showing a display correction means using a display memory, and FIG. 5(a)
(b) is a characteristic diagram showing the write and read timing signals in FIG. 4; FIGS. 6 to 8 are perspective views showing second, third, and fourth embodiments of the stereoscopic television playback device; 9th
This figure and FIG. 10 are sectional views showing two sides of the variable focus shutter glasses used in the stereoscopic television viewing apparatus shown in FIG. 8. 11 to 13 are for explaining conventional examples of 3D television playback devices. FIG. 11 is a perspective view showing a type using shutter glasses, and FIG. 12 is a 3D image reproduction device shown in FIG. 11. FIG. 13 is a perspective view showing a type using a variable focus mirror. (10)--Stereoscopic television reproduction device, (12)--
- Stereoscopic display device, (12a)--display surface, (14)--position correction means, (18)--display correction means, (29)--variable focus shutter glasses, (31)--liquid crystal Shutter, (32) --- Liquid crystal lens, (33) --- Correction lens, (H) --- Observer,
(HL) (HR)'-・Both left and right eyes. Patent applicant: NEC Home Electronics Co., Ltd. Agent: Gangwon Province
I0-mi

Claims (2)

[Claims] (1) A playback device that displays images captured from a plurality of viewpoints on a display surface of a stereoscopic display device and allows an observer to view stereoscopically using binocular convergence and binocular parallax, the display surface of the stereoscopic display device and a display correction means for adjusting the size and display position of the image on the display surface according to the change in the distance. 3D television playback device. (2) Variable focus shutter glasses worn by an observer to vary the optical distance from the display surface of a 3D display device, which are placed in front of the observer's left and right eyes and alternately A pair of left and right liquid crystal shutters that can be switched, a pair of left and right liquid crystal lenses that are placed in front of the liquid crystal shutters and whose refractive index changes depending on the applied voltage, and a pair of left and right liquid crystal lenses that are placed in front of the liquid crystal lenses.
Variable focus shutter glasses characterized by comprising a pair of left and right correction lenses that adjust the convergence angle of both the left and right eyes.