JP2002101430A - Three-dimensional color display unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional color display unit that displays a natural stereoscopic color image according to the human engineering and is not a stereoscopic display device employing eyeglasses and a special lenticular stereoscopic display device. SOLUTION: This invention provides the three-dimensional color display unit that integrally stacks screens consisting of RGB display pixels, which are arranged in XY directions, in the Z direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional (3D) color display unit for displaying a natural three-dimensional color image (video).

[0002]

2. Description of the Related Art Most of three-dimensional video software used in a three-dimensional video (image) display system, which has recently become a topic, is specially created for a three-dimensional video display system. Generally, such three-dimensional video software is obtained by capturing and recording a left-eye video and a right-eye video using two cameras. The left and right images recorded in the three-dimensional image software are superimposed and displayed almost simultaneously on the display device. Then, the left-eye image and the right-eye image, which are superimposed and displayed, are separately incident on the left and right eyes of the observer, whereby the observer recognizes the three-dimensional image.

[0003] By the way, there are a number of 2D video softwares at present, and if 3D video can be generated from these 2D video software, 3D video software having the same contents as existing 2D video software will be first used. Various methods have been proposed for converting a two-dimensional image into a three-dimensional image in order to save the trouble of re-creating the image from the image. That is, in the case of a two-dimensional video in which an object moving from left to right is shown, the original two-dimensional video is used as the left-eye video, and the video several frames before this left-eye video is used as the right-eye video. Is the way. In this case, a parallax is generated between the left-eye image and the right-eye image. By displaying these images almost simultaneously on the screen, the moving object is raised forward with respect to the background.

There is also a method of reducing the delay amount of one of the left-eye image and the right-eye image as the movement of the moving object becomes faster in order to obtain a stable three-dimensional effect. In this method, a relatively new field is presented as a delayed image for a fast moving image, and a relatively old field is presented as a delayed image for a slow moving image. As described above, when changing the other delay amount for one of the left-eye image and the right-eye image, a field memory corresponding to the number of the other maximum delay amount for one of the left-eye image and the right-eye image is required. Become.

For this reason, when the movement of the input image is fast, the input image is written to the field memory for each field, and when the movement of the input image is slow, the input image is written to the field memory at intervals of one field. Thus, a method of converting a two-dimensional video into a three-dimensional video, which can reduce the number of fields, has been proposed.

As a method of reducing the field memory capacity, a main image and a sub-image delayed with respect to the main image using the field memory are generated from a two-dimensional image in which the same frame appears continuously. Accordingly, there is a method of converting a two-dimensional image into a three-dimensional image (Japanese Patent Laid-Open No. 8-2
No. 89331), and for each field group in which the same frame appears continuously, only the video of one field among a plurality of fields in each field group is written to the field memory. In the selection of the sub-image, a delay amount of the sub-image frame with respect to the main image frame is calculated based on the speed of movement of the main image, and the sub-image is selected based on the calculated delay amount. In this case, the delay amount of the sub-picture frame with respect to the main video frame is determined such that the delay of the sub-picture frame with respect to the main video frame increases as the movement of the main video becomes slower.

On the other hand, even if various display technologies for a three-dimensional display such as a three-dimensional television receiver have been developed, three-dimensional (3D) software for viewing the technology can be photographed.
Since the recording technique is the same as the conventional technique for 2D, the display expression is limited, and a better method is required.

Referring to FIG. 8, this method will be described. In the photographing and displaying apparatus A ', two video cameras 100 and 100 are usually used for photographing a three-dimensional stereoscopic image. (Approximately 65 mm) apart, fixed to the stay 102 of the tripod 101, and moved synchronously. Two video signals corresponding to the images viewed by the right and left eyes are output from the two video cameras 100, 100, but cannot be recorded on a normal VTR (video tape recorder) 103 as they are. Using a converter 104, the signal is converted into a so-called field-sequential stereoscopic video signal S in which video signals corresponding to images viewed by the right eye and the left eye are alternately input for each field, and then recorded on the VTR 103.

In order to stereoscopically view the field-sequential stereoscopic video signal, the stereoscopic video signal is projected on a screen 105a of the stereoscopic television receiver 105 as shown in FIG. With the shutter glasses 106 configured as above. In this way, the right eye sees the right-eye image, and the left eye sees the left-eye image. As a result, a stereoscopic image is seen.

However, when the user wears the shutter glasses 106, the number of screens viewed on the screen 105a of the television receiver 105 is reduced to half of the normal number. That is, NTSC
In the case of a signal, the field frequency is 60 Hz, which is half of 30 Hz, and the field frequency is 50 Hz.
If it is less, flicker becomes noticeable. Therefore, in a three-dimensional stereoscopic vision device such as a so-called stereoscopic television receiver,
The field frequency is doubled as usual. In other words, in the case of the NTSC signal, the field frequency is projected on the screen at a double frequency of 120 Hz.
Even when wearing shutter glasses, half of the frequency is 60 Hz, and flicker is not noticeable.

However, when the conventional field-sequential three-dimensional video signal S is converted into a double scan and projected, the field-sequential three-dimensional video signal S is originally used for the right eye as shown in FIG. Since the left-eye video has only 30 Hz, which is half of the normal video, the same video is used twice. For this reason, although the flicker could be reduced by performing the double scan, the disadvantage of being able to express only one half of 60 moving images per second, which is half of 60 images per second, which is the original performance due to signal recording. was there.

In order to solve this problem, for example, Japanese Patent Application Laid-Open No. 9-322198 discloses a so-called “stereoscopic device” in which an image for one eye is positioned on the right half of the screen and an image for the other eye is positioned on the left half of the screen. The right and left screens of the three-dimensional stereoscopic video signal of a three-dimensional stereoscopic video signal taken as in "Photo (stereo pair)" are cut out, and then enlarged to fill the entire screen. The field frequency is doubled, and a video signal is output so that an enlarged screen for the right eye and an enlarged screen for the left eye come for each field doubled.

With this configuration, a field-sequential stereoscopic video signal can be recorded and played back by a normal video tape recorder, but when a double scan is performed on the screen of a television receiver to display it, When a video that could only be expressed with half the original video expression capability is recorded and played back with a normal video tape recorder using a stereoscopic video signal, converted, and displayed by double scanning on the screen of the TV receiver It is possible to make full use of the animation expression ability.

[0014] At present, two tapes are used like W-VHS.
Since a device that can record two video signals at the same time is commercially available, the video signal may be used for recording and playback. This 2
In order to stereoscopically view two video signals, for example, a method is used in which two video projectors are used to project the light onto a screen as projection light whose polarization directions are orthogonal to each other, and view the images using polarized glasses equipped with corresponding polarization filters. It has been known.
As a method of simplifying recording and reproduction, two video signals for the left eye and the right eye are converted into one video signal in which the video for the left eye and the video for the right eye come alternately for each field. Techniques for doing so are known. This signal is projected on a television screen, and it can be stereoscopically viewed by wearing glasses with shutters that alternately cover one eye in synchronization.

As a still simpler photographing method, there is used a method of photographing a video in a form like a three-dimensional photograph in which images for the right eye and the left eye are projected on the right half and the left half of the screen by an optical method. It is. Further, an adapter and a viewer for taking a slide of a stereoscopic photograph with a camera are commercially available. When shooting with this adapter, the right eye is projected on the right half of the screen and the left eye is projected on the left half, so if the difference between the centers of the two screens on the small TV screen is less than the interpupillary distance, autostereoscopic viewing is possible. Become. In the case of a larger screen, a wedge-type special lens may be attached (see Japanese Patent Application Laid-Open No. 59-3970).
No. 0390). In particular, the method of easily taking a three-dimensional image disclosed in Japanese Patent Application Laid-Open No. 59-30390 is to apply a wedge-type filter in front of an imaging lens of a video camera and take an image like a three-dimensional photograph. . Then, this was projected on a television screen as a stereoscopic photograph, and stereoscopically viewed with wedge-shaped special glasses.

[0016] However, in order to stereoscopically view an image taken by the stereoscopic photography, the position to be viewed is limited, such as placing the face in the center of the television screen. In addition, there is an inconvenience that only a vertically long image obtained by dividing the screen into two right and left parts can be viewed.

In order to solve this problem, there is a technique of converting a stereoscopic video signal into a field-sequential stereoscopic signal (for example, Japanese Patent Application No. 7-334423). When converting into a three-dimensional signal, it is necessary to enlarge the image at least twice in length and width and four times in area. For this reason, the resolution of the converted video is reduced to half of the original resolution both vertically and horizontally, and there is a demand for the development of a technology that does not reduce the resolution as much as possible.

[0018]

Considering that two-dimensional (2D) and three-dimensional (3D) software are to be played back together, it is necessary to set them individually in the case of 3D, and a 3D video signal is input. In such a case, there is a demand for an automation technology that automatically operates and processes the circuit. Further, in the three-dimensional photograph type, an image becomes two small screens on the left and right of the screen, and a field-sequential image appears as a double image if viewed without shutter glasses. In other words, there is a need for a technology that allows a normal 2D video to be viewed on a television screen even when a stereoscopic or field-sequential 3D signal is input.

The present invention has been made in view of the above circumstances, and an object of the present invention is not to provide a stereoscopic display device using spectacles or a special lenticular killer stereoscopic display as in the prior art, but to provide an ergonomic natural display. An object of the present invention is to provide a three-dimensional color display unit for displaying a three-dimensional color image.

[0020]

SUMMARY OF THE INVENTION The present invention relates to a three-dimensional color display unit.
This is achieved by integrally forming a plurality of screens composed of RGB display pixels aligned in the direction in layers in the Z direction.

It is another object of the present invention to provide a first screen in which RGB display pixels corresponding to a short distance are aligned, a second screen in which RGB display pixels corresponding to a medium distance are aligned, and a second screen in which RGB display pixels corresponding to a medium distance are aligned. This is achieved by layering the RGB display pixels to be aligned with a third screen arranged.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the conventional stereoscopic display technology, left and right video signals are temporally displayed in a field, and the left and right video signals are distinguished by glasses or a wrench killer to express a stereoscopic video signal. 1A and 1B show physiological factors of stereoscopic vision. FIG. 1A shows a case due to binocular parallax based on a difference between left and right images, and FIG. 1B shows a case due to convergence based on rotation of an eyeball. ing. FIG. 1C shows a case based on focus adjustment based on a change in the lens of the eye, and FIG. 1D shows a case based on motion parallax based on a difference in image due to movement.
The present invention is not a left and right video signal expression but a hierarchical focus combining method based on a Z-axis expression of a technology close to FIG. 1C. By doing so, an appropriate three-dimensional color image can be displayed.

Hereinafter, a three-dimensional color display unit according to the present invention will be described with reference to the drawings.

FIG. 2 shows the principle configuration of the present invention. The display screen 10 has a three-layer structure in the Z direction,
A screen 11 corresponding to a short distance image in which the RGB display pixels 110 are arranged as shown in FIG. 3, and a screen 12 corresponding to a medium distance image in which a number of RGB display pixels 120 are arranged as shown in FIG. Many RGB display pixels 13
As shown in FIG. 5, a screen 13 corresponding to a long-distance image is arranged integrally. By providing the screens 11 to 13 in layers, the RGB display pixels 110, 120, and 130 as shown in FIG.
Are arranged uniformly in the XY directions. The RGB display pixels 110, 120, and 130 have light emitting units 111, 121, and 131, respectively.
The light from 11, 121, 131 is
After passing through the RGB fluorescent units 113,12 through 2,122,132
3,133. Light emitting units 111, 121, 131
Is controlled by the backlight control 20, and R
RGB fluorescent section 1 of GB display pixels 110, 120, and 130
Reference numerals 13, 123, and 133 denote a drive control unit 11 including a CPU or the like.
4, 124, 134. Drive control unit 114,
Video signals from the camera 30 are input to 124 and 134, and the drive control units 114, 124 and 134 control the
The light is distributed to the B fluorescent portions 113, 123, and 133. The camera 30 is a long-range left and right camera, a medium-range left and right camera,
Although shown as a short-range left and right camera, it is actually one
There are two cameras.

When the camera 30 picks up an image of an object at a distance from near and far and inputs the image to the drive control units 114, 124 and 134, the image pick-up signals are converted to screens 11 to 13 corresponding to the distance between the near and far points.
The light is displayed by the fluorescent portions 113 to 133 of the RGB display pixels on each of the screens 11 to 13. The display screen 10 is composed of screens 11 to 13 having a three-layer structure.
Since it is supplied to the 13 RGB pixels, it will be seen as a three-dimensional image when viewed from the front of the display screen.

FIG. 7 shows an image of an object a placed at a long distance by a camera, an image of an object b at a medium distance taken by a camera, and an image of a c object placed at a short distance taken by a camera. Each is controlled by a controller such as a CPU and distributed to the drive circuits, and the backlight is controlled by the backlight control. Also in this case, the video signals corresponding to the near, middle, and far distances are supplied to the RGB pixels of the screens 11 to 13, so that when viewed from the front of the display screen, they appear as three-dimensional images.

[0027]

As described above, according to the three-dimensional display unit according to the present invention, an ergonomic natural three-dimensional color image can be displayed instead of a three-dimensional display device using glasses or a special lenticular killer three-dimensional display. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining the principle of a three-dimensional display.

FIG. 2 is a schematic view illustrating the principle of the present invention.

FIG. 3 is a plan view showing an arrangement example of RGB pixel display on a short-distance screen.

FIG. 4 is a plan view showing an example of arrangement of RGB pixel display on a middle distance screen.

FIG. 5 is a plan view showing an arrangement example of RGB pixel display on a long distance screen.

FIG. 6 is a plan view showing an arrangement example of RGB pixel display on the entire screen.

FIG. 7 is a schematic view illustrating the principle of the present invention.

FIG. 8 is a connection diagram illustrating an example of a conventional three-dimensional display device.

FIG. 9 is a diagram for explaining the operation of the conventional device.

[Explanation of symbols]

 Reference Signs List 10 display screen 11, 12, 13 screen 20 backlight control 30 camera 110, 120, 130 RGB display pixel 111, 121, 131 light emitting section 112, 122, 132 lens 113, 123, 133 RGB fluorescent section 114, 124, 134 drive Control unit

Claims (9)

[Claims] 1. A three-dimensional color display unit comprising a plurality of screens each composed of RGB display pixels arranged in the X and Y directions and layered in the Z direction to be integrated. 2. The whole of the RGB display pixels are uniformly arranged in the XY directions as viewed from the Z direction.
3. The three-dimensional color display unit according to 1. 3. The three-dimensional color display unit according to claim 2, wherein said RGB display pixels comprise a light emitting part, a lens and a fluorescent part. 4. The three-dimensional color display unit according to claim 3, wherein said light emitting section can be controlled by a backlight. 5. A first screen in which RGB display pixels corresponding to a short distance are arranged, a second screen in which RGB display pixels corresponding to a medium distance are arranged, and an R screen corresponding to a long distance.
A three-dimensional color display unit, wherein a third screen in which GB display pixels are arranged is layered and integrated. 6. The device according to claim 6, wherein the first screen is on the front side and the third screen is
The three-dimensional color display unit according to claim 5, wherein a screen is arranged at a deepest part, and the second screen is arranged between the first screen and the third screen. 7. The three-dimensional color display unit according to claim 5, wherein the entirety of the RGB display pixels are uniformly arranged in a plane when viewed from the layering direction of the first screen to the third screen. 8. The three-dimensional color display unit according to claim 6, wherein said RGB display pixels comprise a light emitting portion, a lens and a fluorescent portion. 9. The three-dimensional color display unit according to claim 8, wherein the light emitting section can be controlled by a backlight.