JP3423457B2 - Display device and display method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying a two-dimensional image or a three-dimensional image using a display means such as a CRT or a liquid crystal panel.

[0002]

2. Description of the Related Art In recent years, video screens have become larger and three-dimensional, but in response to this, devices for viewing video images are desired to be smaller and lighter. Display devices have been developed.

These devices project an image displayed on a two-dimensional image display device such as a small CRT or a liquid crystal display corresponding to the left and right eyes onto the retinas of the left and right eyes via an optical system. It is attached to the head or face, and is superior in space saving and portability to stationary displays.

Further, since the two display devices for the left and right eyes are provided, it is possible to display a three-dimensional image.

[0005]

However, in the above conventional example, the size of the angle of view of the displayed image is determined by the size of the display device such as a CRT or liquid crystal display used in the device and the magnification of the optical system. However, in order to get a sense of reality, it is better to have a large angle of view, but it is not just that the angle of view is large, but the optimum angle of view depends on the type of video to be viewed. Is determined, and if it is not so much, there is a problem that the observer feels fatigue. That is, when an image with a large amount of movement is viewed on a screen that is too large, the movement of the image becomes large and the observer needs to move his eyes or face greatly, which increases fatigue.

Further, in order to improve such a problem, it is considered that the angle of view can be changed by using an optical system in which the magnification of the optical system can be changed. However, this makes the optical system large. As a result, the size of the entire device also increases, which causes a problem that the superiority of a head-mounted display such as a small size and a light weight to a stationary display is impaired.

In view of the above, the present invention provides a display device arranged in a position where only the left and right eyes can see the display device, in which the angle of view of a display image can be changed without enlarging the optical system. The purpose of 1.

A second object of the present invention is to provide a display device capable of automatically displaying an optimum angle of view in accordance with an image input to the display device.

A third object of the present invention is to provide a display device in which an observer can easily fuse the left and right images by changing the positions of the images displayed on the left and right display devices. And

Further, according to the present invention, the image is automatically displayed at the optimum position according to the image input to the display device, so that the observer observes the image under the optimum conditions regarding the angle of view and the angle of convergence. Fourthly, to provide a display device capable of
The purpose of.

[0011]

In order to achieve the above object, a display device according to claim 1 of the present invention displays an image of an input video signal at a display position where the left eye observes it. Display means, second display means for displaying an image of the input video signal at a display position for observation with the right eye, image size changing means for enlarging or reducing the image, and enlarging or reducing the image. A display position in which the first and second display means have a relatively equal positional relationship for an image enlarged or reduced according to the set image magnification. To display.

According to a second aspect of the present invention, there is provided a display device for displaying an image of an input video signal at a display position where the left eye observes the image, and an image of the input video signal for the right eye. Second display means for displaying at the display position for observation, image size changing means for enlarging or reducing the image, and angle of view for detecting optimum angle-of-view information when displaying the image of the input video signal. An information detection means, and an image enlarged or reduced according to a magnification determined from the detected angle-of-view information is displayed at a display position where the first and second display means have a relatively equal positional relationship. indicate.

A display device according to claim 3 is a display position setting means for setting a display position of the enlarged or reduced image in the display device according to claim 1 or 2.
Display position control means for displaying the image at the set display position.

A display device according to a fourth aspect is a display position for detecting information of an optimum display position when displaying an image of the input video signal in the display device according to any one of the first to third aspects. It is characterized by including a detection means, and displaying the enlarged or reduced image based on the information of the detected optimum display position.

According to a fifth aspect of the present invention, there is provided a method of displaying an image of an input video signal at a display position where the left eye observes it and displaying an image of the input video signal at a display position where the right eye observes it. , The image is enlarged or reduced, the magnification of the image to be enlarged or reduced is set, and the image enlarged or reduced according to the set image magnification is displayed at a display position having a relatively equal positional relationship. To display.

[0016]

In the display device according to the first aspect of the present invention, the image of the input video signal is displayed on the display position where the left eye observes the image of the input video signal, and the image of the input video signal is displayed in the second position. Displayed at the display position to be observed with the right eye by the display means of
The image size changing means enlarges or reduces the image, the magnification setting means sets a magnification of the image to be enlarged or reduced, and the image enlarged or reduced according to the set magnification of the image is the first image. And the second display means displays at a display position having a relatively equal positional relationship.

In the display device according to the second aspect, the image of the input video signal is displayed on the display position where the left eye observes the image of the input video signal, and the image of the input video signal is displayed by the second display means. To display the image at the display position to be observed by the right eye, to enlarge or reduce the image by the image size changing means, and to display the optimum view angle information when displaying the image of the input video signal by the view angle information detecting means. The first and second display means detect and display the image enlarged or reduced in accordance with the magnification determined from the detected angle-of-view information at display positions having a relatively equal positional relationship.

In the display device according to the third aspect, the display position of the enlarged or reduced image is set by the display position setting means, and the image is displayed at the set display position by the display position control means.

In the display device according to the fourth aspect, the display position detecting means detects the information of the optimum display position when displaying the image of the inputted video signal, and the information of the detected optimum display position. And displaying the enlarged or reduced image based on.

[0020]

EXAMPLE An example of the display device of the present invention will be described.

[First Embodiment] FIG. 1 is a block diagram showing the arrangement of a display device according to the first embodiment. In the figure, 1R,
1L is a video signal input terminal, 2R and 2L are Y / that separates a video signal into a luminance signal (Y signal) and a color signal (C signal).
The C separation circuits 3R and 3L use the Y signal and the C signal for R,
Decoder for producing three primary color signals of G and B, 4R and 4L are R,
A signal processing circuit for performing processing necessary for displaying G and B signals on a display device, 5R and 5L are thinning-out interpolation processing circuits for performing image enlargement or reduction processing, and 6R and 6L are C.
A display device including an RT and a liquid crystal display (LCD),
7R and 7L are sync separation circuits for separating a sync signal from a video signal, 8R and 8L are PLL circuits, and 9R and 9L are drive circuits for driving the display devices 6R and 6L and each circuit.
Is a magnification control circuit for controlling the enlargement or reduction magnification of the thinning interpolation processing circuits 5L, 5R, and 11 is a magnification control circuit 10
It is a magnification setting means for setting the magnification of.

Next, the operation of the display device will be described. The video signal input from the video signal input terminal 1R is input to the Y / C separation circuit 2R and the sync separation circuit 7R,
The Y / C separation circuit 2R separates the video signal into a Y signal and a C signal. The Y signal and the C signal are separated into three primary color signals of R, G, B by the decoder 3R, and the display device 6 is separated by the signal processing circuit 4R.
The necessary processing for displaying on R is performed, and the thinning interpolation processing circuit 5R enlarges or reduces the image, and then is supplied to the display device 6R.

The magnification control circuit 10 controls the thinning interpolation processing circuit 5R so as to enlarge or reduce the image according to the magnification set by the magnification setting means 11.
The detailed configuration and operation of the thinning interpolation processing circuit 5R will be described later.

The sync separation circuit 7R separates the sync signal from the input video signal, and the separated sync signal is PL.
It is input to the L circuit 8R to form a phase locked loop, and controls the drive frequency of the drive circuit 9R. The drive circuit 9R outputs a drive pulse for each signal processing circuit and a pulse for driving the display device 6R.

The same operation as described above is also performed in the system of subscript L. The display device 6R is arranged in a position where only the right eye can see it, and the display device 6L is arranged in a position where only the left eye can see it. The video signal input from the video input terminal 1R is displayed on the display device 6R, and the video signal input from the video input terminal 1L is displayed on the display device 6L.

FIG. 2 is a block diagram showing the configuration of the thinning-out interpolation processing circuits 5R and 5L. In the figure, 21 is a video signal input terminal, 22 is a drive pulse input terminal for driving each internal circuit, and 23 is an output from the magnification control circuit 10 for controlling an image magnification (enlargement ratio, reduction ratio). Input terminal for a magnification control signal, 24 is an A / D conversion circuit for converting an analog signal into a digital signal, 25 is a buffer memory A, 26 is a horizontal thinning interpolation processing circuit for performing horizontal thinning or interpolation processing, and 27 is a buffer. Memory B, 2
Reference numeral 8 is a vertical thinning interpolation processing circuit for performing vertical thinning or interpolation processing, 29 is a display memory, 30 is an address control circuit for controlling writing and reading of the display memory 29, and 31 is a digital signal converted into an analog signal. The D / A conversion circuit 32 is an output terminal for a video signal.

The operation of the thinning interpolation processing circuits 5R and 5L will be described. The video signal input from the video signal input terminal 21 is converted from an analog signal to a digital signal by the A / D conversion circuit 24 and input to the buffer memory A25. The buffer memory A25 is capable of storing at least several consecutive pieces of digital data so that horizontal interpolation processing can be performed. The image data read from the buffer memory A25 is a horizontal thinning interpolation processing circuit 26.
To perform horizontal enlargement or reduction processing. That is, interpolation processing is performed between the input data when expanding in the horizontal direction, and data thinning is performed when reducing.

The enlargement ratio (interpolation ratio) and reduction ratio (decimation ratio) at this time are controlled by a control signal input from the magnification control signal input terminal 23. Horizontal thinning interpolation processing circuit 2
The output of 6 is input to the buffer memory B27. The buffer memory B27 enables vertical interpolation processing.
It is capable of storing digital data of at least several continuous lines. The data read from the buffer memory B27 is vertically expanded or reduced by the vertical thinning interpolation processing circuit 28. Here, enlargement is performed by interpolation processing of data between lines, and reduction is performed by thinning processing.
It is controlled by a control signal input from.

The output of the vertical thinning processing circuit 28 is input to the display memory 29. The display memory 29 is capable of storing at least one field of data, and is predetermined according to a control signal from the address control circuit 30 so that the enlarged or reduced data can be displayed at a predetermined position of the display device 6R. Store the data at the address of.

FIG. 3 is an explanatory view showing the enlargement processing and the reduction processing. The same figure (A) shows the original image and the same figure (B) shows the enlarged image. In the same figure (B), in the enlarged image, the data that is out of the display area due to the enlargement is not stored in the display memory 29, but only the data of the displayable size of the central portion of the image is stored in the display memory 29. To be done.

When the image is reduced, the reduced image data is stored in the central portion of the display memory 29 as shown in FIG. At this time, the left and right image data are stored at the same address in the display memory 29 so that the enlarged or reduced image is displayed at the same position on the left and right display devices 6R and 6L.

Further, the address control circuit 30 can be expanded or reduced to various magnifications by controlling the write address of the display memory 29 according to the magnification set by the magnification control signal, and the display devices 6R and 6L can be enlarged or reduced. It can be displayed at a predetermined position. The data read from the display memory 29 is converted from a digital signal to an analog signal by the D / A conversion circuit 31, and is output from the output terminal 32.

The observer can display the image of the video signal input from the input terminals 1R and 1L on the display devices 6R and 6L for observation. At this time, both input terminals 1R,
When the same signal is input to 1L, a two-dimensional image can be observed, and when the right eye image and the left eye image of different objects are input to the input terminals 1R and 1L by an amount corresponding to the binocular parallax, Can observe a three-dimensional image. further,
An observer can operate the magnification setting means 11 to set a desired magnification to observe an image enlarged or reduced at the magnification set on each of the left and right display devices 6R and 6L, thus enlarging the optical system. It is possible to freely change the angle of view of the displayed image without any need.

[Second Embodiment] Next, a display device according to a second embodiment will be described. FIG. 4 is a block diagram showing the configuration of the display device of the second embodiment. The same components as those in the first embodiment are designated by the same reference numerals. In the figure, reference numeral 12 is a view angle information detection circuit for detecting the optimum view angle information added to the video signal.

The operation of the display device of the second embodiment will be described, but the description of the same operation part as that of the first embodiment will be omitted. The video signal input from the input terminal 1R is input to the thinning interpolation processing circuit 5R via the Y / C separation circuit 2R, the decoder 3R, and the signal processing circuit 4R, and also to the angle-of-view information detection circuit 12.

To the video signal input from the input terminal 1R, information relating to the optimum angle of view for displaying the video is added in advance to a predetermined portion of the video signal, for example, a blanking period of the video signal.

Here, the information added to the video signal has a large angle of view, for example, when the motion of the image is not so intense and a larger field of view is more realistic.
In addition, the information is such that when the observer feels tired when the image moves sharply and the angle of view is too large, the angle of view is set to be slightly smaller.

The angle-of-view information detection circuit 12 detects this angle-of-view information from the video signal, and based on this, the thinning-out interpolation processing circuits 5R and 5L determine the magnification for enlarging or reducing the image, and the magnification control circuit. A control signal is sent to 10, and the thinning interpolation processing circuit 5R performs enlargement or reduction processing according to the control signal from the magnification control circuit 10, and the output is displayed on the display device 6R. The system with the subscript L performs the same operation. The configurations of the thinning-out interpolation processing circuits 5R and 5L are the same as those in the first embodiment.

In this way, the optimum angle of view information is added to the video signal to be displayed in advance when the video is displayed,
By enlarging and reducing the display image based on the view angle information, it is possible to provide a display device capable of automatically displaying an optimum view angle according to the display image. Also, the angle of view information added to the video signal does not have to be constant depending on the type of image, and by adding different information for each scene of the video, it is possible to realize the optimum angle of view for each scene. Is also possible.

In this embodiment, the method of adding the angle-of-view information to the video signal has been described, but the optimum angle-of-view information regarding the video signal input from the input terminal different from the video signal can be input. Not to mention good things. Further, although it is automatically displayed at the view angle set by the detected view angle information, it is also possible to change the view angle desired by the observer by further operating the magnification setting means 11.

[Third Embodiment] The display device of the third embodiment will be described below. FIG. 5 is an explanatory diagram showing the structure of the display device of the third embodiment. The same components as those in the first and second embodiments are designated by the same reference numerals.
In the figure, 13R and 13L are image display position control circuits, and 14R and 14L are display position setting means.

FIG. 6 is a block diagram showing the configuration of the thinning-out interpolation processing circuit. In the figure, reference numeral 33 is an input terminal of a display position control signal for controlling the display position of the image.

The operation of the display device of the third embodiment will be described. The thinning interpolation processing circuit 5 from the input terminals 1R and 1L
The parts up to R and 5L are the same as those in the first and second embodiments. The video signal supplied to the thinning-out interpolation processing circuits 5R and 5L is input from the input terminal 21. Input terminal 21
To the vertical thinning-out interpolation processing circuit 28
And the same as the second embodiment.

The image data read out after being enlarged or reduced by the thinning interpolation processing circuit 28 is written in the display memory 29. The address control circuit 30 is based on the display position control signal input from the input terminal 33, that is, the control signal via the display position control circuits 13R and 13L in accordance with the display position information set by the display position setting means 14R and 14L. , And controls the write address of the display memory 29. For example, when the observer wants to shift the position of the image for the right eye to the left, if the display position setting means 14R is set to shift the display position to the left, the address control circuit 30 displays the output of the thinning interpolation processing circuit 28. When writing into the memory 29 for writing, control is performed so as to write to an address that is displayed to the left of the normal.

When the image data written in the display memory 29 in this way is displayed on the display devices 6R and 6L,
The image for the left eye is displayed at the normal position, and the image for the right eye is displayed at the position displaced to the left from the normal position. Similarly, the display image can be moved vertically and horizontally, and the display position setting means 14 can be used.
The image for the left eye can also be moved by operating L.

When the observer is observing the image for the right eye and the image for the left eye, if it is difficult to fuse the left and right images, the display position of either the left or right image is set to the position where the observer easily fuses. It is possible to easily fuse the images by moving to.

In this embodiment, the method of individually operating the display positions of the left and right images by the two operating means has been described.
It goes without saying that a configuration may be used in which the left and right images are moved in conjunction with one operating means.

[Fourth Embodiment] Next, a display device of a fourth embodiment will be described. FIG. 7 is a block diagram showing the configuration of the display device of the fourth embodiment. The same components as those in the first, second and third embodiments are designated by the same reference numerals. In the figure, 15R and 15L are display position information detection circuits for detecting the optimum display position information added to the video signal.

The operation of the display device of the fourth embodiment will be described. Unlike the third embodiment, the display device of the present embodiment detects the information of the optimum display position of the image added to the video signal, and enlarges or reduces the thinning interpolation processing circuits 5R and 5L according to the detection result. The display positions of the left and right display devices 6R and 6L for the processed image are controlled.

That is, to the video signal input from the input terminal 1R, information relating to the optimum display position for displaying the video is added in advance to a predetermined portion of the video signal, for example, a blanking period of the video signal. deep. This is detected by the display position information detection circuits 15R and 15L, and based on this, the thinning interpolation processing circuits 5R and 5L are controlled via the display position control circuits 13R and 13L to display the same as in the case of the third embodiment. The write address of the memory 29 is controlled. This controls the display positions of the display devices 6R and 6L on which the left and right images are displayed.

At this time, the angle of convergence can be changed by moving the display positions of the images displayed on the left and right display devices 6R and 6L to the left and right. Therefore, information that provides the optimum angle of convergence at the time of display is displayed. By adding it to the video signal, the observer can automatically observe the image under the optimal congestion condition. Further, as another example, when it is desired to make the display image feel closer, the left and right display images are displayed on the display device 6.
It is displayed at the bottom of R and 6L, and at the top when you want to feel it at a distance. By doing so, it is possible to give a sense of perspective to the display image due to the psychological effect of the perspective method, and it is possible to make a further sense of reality.

As described above, by adding information on the optimum display position when the video is displayed in advance to the video signal to be displayed and setting the display position based on the information, the display image is displayed. It is possible to provide a display device capable of automatically displaying at an optimum display position according to the above.

In this embodiment, the method of adding the information on the display position to the video signal is shown. However, it is possible to input the information on the optimum display position on the video signal from an input terminal different from the video signal. Needless to say, it is also good. Also,
Although it is automatically displayed at the display position set by the information of the detected display position, it can be moved to a position desired by the observer by further operating the display position setting means 14.

[0054]

According to the display device of the first aspect of the present invention, the image of the input video signal is displayed on the display position where the left eye observes the image of the input video signal, and the image of the input video signal is displayed. The image is displayed on the display position where the image is viewed with the right eye by the second display means, the image is enlarged or reduced by the image size changing means, and the magnification of the image to be enlarged or reduced is set by the magnification setting means. Since the image enlarged or reduced according to the set image magnification is displayed at the display positions where the first and second display means have a relatively equal positional relationship, the display image does not have to be enlarged in the optical system. The angle of view of can be freely changed.

According to the display device of the second aspect, the image of the input video signal is displayed on the display position where the left eye observes the image of the input video signal, and the image of the input video signal is displayed in the second position. Displayed at the display position to be observed by the right eye by the display means,
The image size changing unit enlarges or reduces the image, and the angle-of-view information detecting unit detects optimum angle-of-view information when displaying the image of the input video signal, and determines from the detected angle-of-view information. The first and second display means display the image enlarged or reduced in accordance with the specified magnification at the display positions having a relatively equal positional relationship, so that the optimum image is automatically obtained according to the input image. It can be displayed in the angle of view.

According to the display device of the third aspect, the display position setting means sets the display position of the enlarged or reduced image, and the display position control means displays the image at the set display position. Therefore, the observer can easily fuse the left and right images.

According to the display device of the fourth aspect, the display position detecting means detects the information of the optimum display position when displaying the image of the input video signal, and the detected optimum display position. Since the enlarged or reduced image is displayed based on the above information, the observer can observe the angle of view, the angle of convergence, and the like under optimum conditions.

According to the display method of the fifth aspect, the image of the input video signal is displayed at the display position where the left eye observes it, and the image of the input video signal is displayed at the display position where the right eye observes it. When the image is enlarged, the image is enlarged or reduced, the magnification of the image to be enlarged or reduced is set, and the image enlarged or reduced according to the set magnification of the image,
Since the images are displayed at the display positions having the same relative positional relationship, the angle of view of the display image can be freely changed without enlarging the optical system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a display device according to a first embodiment.

FIG. 2 is a block diagram showing a configuration of thinning interpolation processing circuits 5R and 5L.

FIG. 3 is an explanatory diagram showing enlargement processing and reduction processing.

FIG. 4 is a block diagram showing a configuration of a display device of a second embodiment.

FIG. 5 is an explanatory diagram showing a configuration of a display device according to a third embodiment.

FIG. 6 is a block diagram showing a configuration of a thinning-out interpolation processing circuit.

FIG. 7 is a block diagram showing a configuration of a display device of a fourth embodiment.

[Explanation of symbols]

4L, 4R ... Signal processing circuit 5L, 5R ... Thinning out interpolation processing circuit 6L, 6R ... Display device 10 Magnification control circuit 11 ... Magnification setting means

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI // G02B 27/22 G02B 27/22

Claims (5)

(57) [Claims] 1. A first display means for displaying an image of an input video signal at a display position for observation with the left eye, and an image of the input video signal for display at a display position for observation with the right eye. A second display means, an image size changing means for enlarging or reducing the image, and a magnification setting means for setting a magnification of the image to be enlarged or reduced, and enlarging or scaling according to the set magnification of the image. A display device, wherein the reduced image is displayed at a display position where the first and second display means have a relatively equal positional relationship. 2. A first display means for displaying an image of an input video signal at a display position for observation with the left eye, and an image of the input video signal for display at a display position for observation with the right eye. A second display means, an image size changing means for enlarging or reducing the image, and an angle-of-view information detecting means for detecting optimum angle-of-view information when displaying the image of the input video signal, It is characterized in that the image enlarged or reduced according to the magnification determined from the detected angle-of-view information is displayed at the display positions where the first and second display means have a relatively equal positional relationship. Display device. 3. A display position setting means for setting a display position of the enlarged or reduced image, and a display position control means for displaying the image at the set display position. The display device according to claim 1 or 2. 4. A display position detection means for detecting information on an optimum display position when displaying an image of the input video signal is provided, and the enlargement is performed based on the detected information on the optimum display position. 4. The display device according to claim 1, which displays a reduced image. 5. When the image of the input video signal is displayed at a display position where the left eye is observed and the image of the input video signal is displayed at a display position where the right eye is observed, the image is enlarged or Reducing, setting a magnification of the image to be enlarged or reduced, and displaying the images enlarged or reduced according to the set magnification of the images at display positions having a relatively equal positional relationship. How to display.