JP3273678B2 - 3D image display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image display device used for industrial, home or medical use.

[0002]

2. Description of the Related Art As a conventional stereoscopic image display device, a viewer wears spectacles having a function of distributing right and left, so that stereo images for the right eye and the left eye displayed in a time-division manner on an image display surface can be displayed. A stereoscopic image for the right eye and the left eye by an image distribution function of the lenticular plate, or a lenticular plate attached to the image display surface, or a lenticular plate attached to the image display surface, respectively. Is generally observed only by the right and left eyes of the observer.

FIG. 11 shows an example of the configuration of the conventional stereoscopic image display device. Reference numeral 60 denotes glasses having a function of sorting left and right, 61a and 61b denote liquid crystal shutters, 62
Is a synchronous circuit, and 63 is a color CRT as an image display device.

[0004] The operation of the stereoscopic image display apparatus according to the first conventional example configured as described above will be described. Color CR
At T63, stereo images for the right and left eyes are alternately displayed in a time-division manner. Liquid crystal shutter 61a of glasses 60
Are opened and in a transparent state only when the right-eye stereo image is output, and the liquid crystal shutter 61b is opened and in a transparent state only when the left-eye stereo image is output. By controlling the open / close state by 62, the observer wearing the spectacles 60 observes only the right-eye stereo image with the right eye, and observes only the left-eye stereo image with the left eye to achieve stereoscopic vision. I do.

FIG. 12 shows the structure of a second conventional three-dimensional image display device. Reference numeral 71 denotes a lenticular plate having a large number of cylindrical lenses formed in stripes, and reference numeral 72 denotes a color CRT as an image display device.

[0006] The operation of the second conventional stereoscopic image display device configured as described above will be described. On the color CRT 72, stereo images for the right eye and the left eye are alternately and simultaneously displayed in a slit shape having a width approximately half the stripe width of the lenticular plate 71. The observer's right eye observes only the right-eye stereo image displayed in the slit shape through the respective cylindrical lenses of the lenticular plate 71, and the left eye similarly displays the slit-shaped left image displayed in the slit shape. Stereoscopic viewing is performed by observing only stereo images for the eyes.

[0007]

However, according to the study of the present inventors, in the stereoscopic image display apparatus of the first conventional example as described above, the stereo image is independent of the right and left eyes of the observer. The observer feels annoying because glasses having a function of distributing the right and left are indispensable to make observation by viewing, and it is necessary to switch the displayed stereo image between the right eye image and the left eye image by time division Therefore, there is a problem that the image flickers and becomes an obstacle in observing the stereoscopic image.

In the stereoscopic image display device according to the second conventional example, since a stereoscopic image is observed through a stripe-shaped lens, the positional tolerance of the observer who can perform stereoscopic vision is narrow, and the observer moves. In this case, the image is deteriorated, and it is difficult for many people to observe the image at the same time. In addition, image processing for displaying the image in a stripe is required, and the apparatus becomes expensive. There was a problem that.

[0009] In the field of medical treatment, when an operation under an endoscope is performed, the operation is usually performed by an operator observing a planar image in the abdominal cavity of the patient, which is projected by the endoscope, on a monitor. However, the monitor image in the abdominal cavity has few features because the entire abdominal cavity is a single color, and it is difficult to confirm the perspective of the affected part. Was also big. On the other hand, when the conventional first and second stereoscopic image display devices are used, the right and left sorting glasses, the flickering of the image and the inconvenience associated with the restriction of the movement of the observer, etc. hinder practical application. That is the current situation.

The present invention provides a stereoscopic image display device which does not require spectacles having a function of distributing left and right, allows a large number of people to perform stereoscopic viewing simultaneously without depending on the position of an observer, and has a screen free from flicker. The purpose is to:

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to provide a stereoscopic image display device comprising a pair of spatially modulating elements having a light transmitting property for displaying a stereoscopic image; A pair of observer image display devices for illuminating from the back surface respectively, and having directivity for enlarging a display portion of the observer image display device located between the spatial modulation element and the observer image display device. A pair of lenses, a half mirror for combining the images displayed on the pair of spatial modulation elements into one, and a photographing device for photographing an observer; Each displays a figure for illuminating the spatial light modulator from the back at a position corresponding to the right face and a position corresponding to the left face of the observer photographed by the photographing device. It is accomplished by the body image display device.

Further, the stereoscopic image display device includes an infrared illuminating device for illuminating a right face or a left face of an observer, and the photographing device can selectively capture an image with respect to an infrared wavelength of the illuminating device. Is preferred.

Further, the three-dimensional image display device includes a pair of illumination devices for illuminating the right face and the left face of the observer with two different wavelengths, and the photographing device has an infrared wavelength of the pair of illumination devices. It is preferable to use a pair of photographing devices provided with wavelength filters that can selectively transmit each of them.

In the stereoscopic image display device, it is preferable that an image other than the face of the observer is removed by comparing two observer images photographed by a pair of photographing devices.

[0015] The stereoscopic image display device photographs either the right face or the left face of the observer with the photographing device,
One half of the pair of observer image display devices may display a half face image captured by the imaging device, and the other may display a negative / positive inverted image of the half face image.

Further, in the stereoscopic image display device,
It is preferable that an image output surface of the observer image display device is installed outside a focal length of the lens.

Further, in the three-dimensional image display device,
It is preferable to use a transmissive liquid crystal display or a light transmissive film as the spatial modulation element.

Further, in the three-dimensional image display device, it is preferable to use a lamp unit that emits infrared light or an LED that emits light in the infrared region as an illuminating device.

Further, in the stereoscopic image display device,
It comprises a pair of lens barrels for taking images from two directions for guiding a subject image to be stereoscopically viewed, and an endoscope provided with a pair of image sensors for converting the obtained pair of subject images into electric signals. The image obtained by the imaging device may be displayed on the stereoscopic image display device.

Still another object of the present invention is to provide a stereoscopic image display device comprising: a pair of spatially modulating elements having a light transmitting property for displaying a stereoscopic image; A pair of observer image display devices for illuminating, and a pair of lenses positioned between the spatial modulation element and the observer image display device and having directivity for enlarging a display portion of the observer image display device A half mirror for combining the images displayed on the pair of spatial modulation elements into one, and a detecting device for detecting the position of the observer, each of the pair of observer image display devices Displaying a figure for illuminating the spatial modulation element at a position corresponding to the right face of the observer and a position corresponding to the left face of the observer detected by the detection device. It is achieved by shown device.

In the three-dimensional image display device, the detecting device for detecting the position of the observer detects the position of the observer using one or two or more ultrasonic waves having different frequencies, The pair of observer image display devices may display figures to be illuminated by the spatial modulation element at positions corresponding to the left and right faces of the observer, respectively.

Further, in the stereoscopic image display device,
It is preferable that an image output surface of the observer image display device is installed outside a focal length of the lens.

Further, in the three-dimensional image display device,
It is preferable to use a transmissive liquid crystal display or a light transmissive film as the spatial modulation element.

Further, in the three-dimensional image display device, it is preferable to use a lamp unit that emits infrared light or an LED that emits light in the infrared region as an illuminating device.

Further, in the three-dimensional image display device,
It comprises a pair of lens barrels for taking images from two directions for guiding a subject image to be stereoscopically viewed, and an endoscope provided with a pair of image sensors for converting the obtained pair of subject images into electric signals. The image obtained by the imaging device may be displayed on the stereoscopic image display device.

[0026]

According to the present invention, the right-eye image displayed on one of the spatial light modulators coincides with the observer's right face image displayed on the observer image display device (right) from the back side. Is illuminated as illumination and enters only around the right eye of the observer through a directional lens,
The observer's right eye sees a figure corresponding to the observer's right face image as a virtual image. At this time, the left face of the observer image displayed on the observer image display device (right) by the lens having directivity enters the left eye of the observer. Since the portion corresponding to the left face of the apparatus (right) does not emit light, the image for the right eye cannot be seen by the left eye of the observer.

Similarly, for the left-eye image, the left-eye image displayed on the other side of the spatial light modulator illuminates a figure corresponding to the observer's left face image displayed on the observer image display device from the back side. Is illuminated as, and is incident only around the left eye of the observer by the directional lens, the left eye of the observer sees a figure matching the left face image of the observer as a virtual image, The right eye cannot observe the left eye image.

Here, the lens having directivity may be any as long as it has a function of selecting left and right, and is preferably a convex lens or a Fresnel lens. Further, the figure displayed on the observer image display device may be the face half-face image of the observer as it is, but it is more preferable to use a figure obtained by processing the obtained face half-face image and deleting peripheral extra information. . The right-eye image and the left-eye image are combined into one by a half mirror, but only the right-eye image and the left-eye image are left-eye and right-eye images, respectively, due to the directional lens selecting action. Since it is proved from the back side and recognized as an image, the observer can observe a stereoscopic image without flicker. In addition, when the observer moves, the observer's own half-plane image displayed on the observer image display device also follows,
The above-described stereoscopic viewing condition is maintained. For the same reason, even when the number of observers is large, each observer can perform stereoscopic vision.

The present invention further comprises an illuminating device for illuminating the right face or the left face of the observer, wherein the illumination of the illuminating device is infrared illumination that is not recognized by the observer, and the photographing device is an infrared ray of the illuminating device. By making it possible to selectively capture an image with respect to the wavelength, it is possible to eliminate the influence of disturbance light and easily obtain a half-face image of the observer's face without causing discomfort to the observer.

Further, the stereoscopic image display device of the present invention includes a pair of illumination devices for illuminating the right face and the left face of the observer with infrared rays having two different wavelengths, and the photographing device includes the pair of illumination devices. By using a pair of imaging devices provided with a wavelength filter that can selectively transmit each of the infrared wavelengths, the effects of light and disturbance light on the other side can be eliminated, and the viewer can easily feel uncomfortable. A right face image and a left face image of the observer can be obtained.

The three-dimensional image display apparatus of the present invention removes an image other than the face of the observer by subtracting two observer images photographed by a pair of photographing devices, thereby displaying the observer image. The influence of disturbance light when the device illuminates the spatial modulation element can be eliminated.

Further, in the stereoscopic image display device of the present invention, either the right face or the left face of the observer is photographed by the photographing device and the illuminating device, and the photographing image is displayed on one of the pair of observer image display devices. By displaying a half-face image captured by the device and displaying a negative / positive inverted image of the half-face image on the other side, it is possible to substitute the functions of two units with one imaging device. .

Further, the above-mentioned infrared illumination can easily illuminate the observer's half face by fixing it to the observer's head with a headband or the like so as to illuminate the observer's left and / or right face. Can be.

Also, instead of using infrared illumination, an observer wears a mask or hat that has been subjected to a process of emitting fluorescent light, and is illuminated with a light source that emits fluorescent light. Can emit light.

In the stereoscopic image display device of the present invention, a detecting device for detecting the position of the observer can be used instead of using the photographing device. Here, what is displayed on the pair of observer image display devices does not need to be the left and right face half-face images of the observer, and may be any figure that becomes the illumination of the pair of spatial modulation elements. What is necessary is just to display a preset lighting figure at a position corresponding to the detected left and right faces of the observer.

As the detection device, a device using ultrasonic waves, a device that attaches a transmitter such as a radio wave or a magnet to the observer's head, and detects them can be considered.

[0037]

【Example】

(Embodiment 1) FIG. 1 shows a configuration of a stereoscopic image display apparatus according to an embodiment of the present invention. In FIG.
10a and 10b are transmissive liquid crystal displays as spatial modulation elements, and 11a and 11b are spatial modulation elements 10a and 10b.
focal length 15 as lenses located on the back side of b
It is a 0 mm Fresnel lens. Reference numerals 12a and 12b denote black and white CRTs as observer image display devices having a light emitting function, which are located on opposite sides of the spatial modulation elements 10a and 10b with the lenses 11a and 11b interposed therebetween, respectively.
It is installed at a position farther than the focal length 1b and 160 mm away from the lenses 11a and 11b. 13a and 13b are LED devices having wavelengths of 850 nm and 950 nm, respectively, as illumination devices, and 14a and 14b are black and white C as image capturing devices.
A CD camera 15 is a half mirror for combining images displayed on the spatial modulation elements 10a and 10b into one,
Reference numerals 6 and 17 denote observers who observe a stereoscopic image.

FIG. 2 shows a state in which the observers 16 and 17 are illuminated from the front by the LEDs 13a and 13b. Reference numerals 20a and 20b denote the areas where the lights of the LEDs 13a and 13b are respectively irradiated.

FIG. 3 shows the emission wavelength characteristics of the LEDs 13a and 13b.
5b shows the wavelength distribution of the LED 13b,
Reference numeral 6b denotes an area selectively transmitted by the wavelength filters mounted on the monochrome CCD cameras 14a and 14b, respectively.

FIG. 4 shows a monochrome CCD camera 14a, 14b.
30 is an imaging lens, 31a and 31b are interference filters as wavelength filters, and 32 is a CCD.
An image sensor containing a chip, 33 is a driving circuit of the image sensor,
Reference numeral 34 denotes a subject.

FIG. 5 shows how the observer observes his or her own face image as a virtual image in the embodiment shown in FIG. 1.
RT) and only one lens are shown, and a half mirror, a liquid crystal display, another lens, and an observer image display device are omitted. 11a is a lens, 12a
Is a black and white CRT, 16 and 17 are two observers observing a stereoscopic image, and 40, 41, 42 and 43 are black and white CRTs 1
2A shows an area of the observer image displayed on the screen of 2a which the observer actually looks at.

The operation of the stereoscopic image display device configured as described above will be described with reference to FIGS. The stereo images observed by the observers 16 and 17 in FIG. 1 are the right-eye image on the liquid crystal display 10a, and the left-eye image on the liquid crystal display 10b
, And the two stereo images are combined into one screen by the half mirror 15. In addition, L arranged on both sides in front of the observers 16 and 17
The EDs 13a and 13b are, as shown in FIG.
3a positions the right half area 20a on the faces of the observers 16 and 17 so that the LED 13b illuminates the left half area 20b on the faces of the observers 16 and 17. The emission wavelengths of the LEDs 13a and 13b have distributions 25a and 25b centered at 850 nm and 950 nm, respectively, as shown in FIG. It can be used as a wavelength light source. On the other hand, as shown in FIG.
2 and the imaging lens 30 each have a wavelength of 850 ± 20.
Since the interference filters 31a and 31b having transmission characteristics of 950 ± 20 nm and 950 ± 20 nm are inserted, when the subject 34 forms an image on the image sensor 32, the wavelength region 26 in FIG.
Only the portions illuminated by a and 26b remain as images. Therefore, according to the above configuration, the CCD camera 14a
Shows a monochrome CRT by photographing only the area 20a in FIG.
12a, the CCD camera 14b can photograph only the area 20b in FIG. 2 and display it on the monochrome CRT 12b. On the black and white CRTs 12a and 12b, an observer 1 photographed by CCD cameras 14a and 14b, respectively.
The images 6 and 17 are displayed upside down. At this time, the brightness and contrast of the black and white CRTs 12a and 12b and the lens apertures of the CCD cameras 14a and 14b are adjusted so that the face areas 20a and 20b are displayed with white and high brightness. Keep it.

Next, the operation of the Fresnel lenses 11a and 11b will be described with reference to FIG. Fresnel lens 11
a, the observer image displayed upside down on the monochrome CRT 12a is installed so that the observers 16 and 17 can observe it as a virtual image, but the distance from the monochrome CRT 12a is set outside the focal length of the Fresnel lens 11a. Observer 1
The right eye and left eye 6 respectively include only the regions 40 and 41 on the screen of the monochrome CRT 12a, and the right eye of the observer 17;
For the left eye, only the areas 42 and 43 on the screen of the black and white CRT 12a are independently provided and the Fresnel lens 11a
Can be observed with the effective diameter as a limit. For this reason, when the regions 40 and 42 are light emitting surfaces, the regions 40 and 42 can serve as illumination for the viewers 16 and 17 with selectivity to the right eye having a size equivalent to the effective diameter of the Fresnel lens 11a. 40 acts on the right eye of the observer 16, and the area 42 acts on the right eye of the observer 17. At this time,
Since the regions 41 and 43 do not emit light, a black and white CR
Light from T12a does not enter. The operation of the Fresnel lens 11a described above is the same for the Fresnel lens 11b, and the light from the monochrome CRT 12b enters only the left eye.

Therefore, the black-and-white CRT described above is used.
Observers 16 and 17 in FIG. 2 displayed on 12a
The right half surface area 20a of the face of FIG.
The observers 16 and 17 observe a bright virtual image only to the right eye, and the left half surface region 20b in FIG. 2 displayed on the monochrome CRT 12b corresponds to the regions 41 and 43 in FIG. Thus, the observers 16 and 17 observe a bright virtual image only to the left eye.
However, since the image displayed on the monochrome CRT 12b is observed through the half mirror 15 as shown in FIG.

By the operation of the present apparatus described above, the stereo image for the right eye displayed on the liquid crystal display 10a in FIG. 1 can be observed only by the right eyes of the observers 16 and 17 by being illuminated from the back side and can be observed. The stereo image for the left eye displayed on the display 10b is
Since only the left eyes 6 and 17 are illuminated from the back and can be observed, the observers 16 and 17 can observe a pair of stereo images at the same time, and both can view stereoscopically. Further, even if the observers 16 and 17 move, the LE shown in FIG.
As long as the illumination condition by D is maintained, stereoscopic vision can be achieved.

In the above embodiment, a transmissive liquid crystal display is used as the spatial modulation element. However, the spatial modulation element may be any as long as it has optical transparency and can display a stereo image. It may be a recorded film. The LED used as the light only needs to be capable of emitting two different wavelengths in the infrared wavelength region. For example, a LED having a wavelength filter attached to a halogen lamp to limit the emission wavelength band may be used.

(Embodiment 2) FIG. 6 shows the configuration of a stereoscopic image display apparatus according to a second embodiment of the present invention.
a and 10b are transmissive liquid crystal displays as spatial modulation elements, and 11a and 11b are focal lengths of 150 m as lenses located on the back surfaces of the spatial modulation elements 10a and 10b, respectively.
m Fresnel lens. Reference numerals 12a and 12b denote black and white CRTs as observer image display devices having a light emitting function.
It is located on the opposite side to a and 10b, and is installed at a distance of 160 mm from the lenses 11a and 11b. 13a and 13b are LEs with wavelengths of 850 nm and 950 nm as illumination devices, respectively.
D-light, 14a, 14b are monochrome CCD as photographing device
A camera 15 is a half mirror for combining images displayed on the spatial modulation elements 10a and 10b into one, 16, 1
Reference numeral 7 denotes an observer who observes a stereoscopic image, and reference numeral 18 denotes a difference processing device.

The operation of the three-dimensional image display device constructed as described above is basically the same as that of the first embodiment of the present invention shown in FIG. The description will be omitted, and only different points will be described. Camera 14
The video signals of the face images of the observers 16 and 17 captured separately at a and 14b are input to the difference processing device 18 and differentiated from each other.
b. Since the common part between the two images is canceled by the above-described difference processing, the observer 1
Unnecessary images due to the configuration of the present three-dimensional image display device such as the backgrounds 6 and 17 can be removed.

(Embodiment 3) FIG. 7 shows a configuration of a stereoscopic image display apparatus according to a third embodiment of the present invention.
a and 10b are transmissive liquid crystal displays as spatial modulation elements, and 11a and 11b are focal lengths of 150 m as lenses located on the back surfaces of the spatial modulation elements 10a and 10b, respectively.
m Fresnel lens. Reference numerals 12a and 12b denote black and white CRTs as observer image display devices having a light emitting function.
It is located on the opposite side to a and 10b and is installed at a distance of 160 mm from the lenses 11a and 11b. 13 is an LED light having a wavelength of 850 nm as an illumination device, 14 is a monochrome CCD camera as an imaging device, 15 is a half mirror for combining images displayed on the spatial modulation elements 10a and 10b into one,
16 and 17 are observers observing a stereoscopic image, 19
Indicates an image processing apparatus. 44a, 44b are monochrome CRT1
It is a right face image of the observers 16 and 17 displayed on 2a,
This is the light emitting portion of the monochrome CRT 12a.

The operation of the three-dimensional image display device configured as described above is basically the same as that of the first embodiment of the present invention shown in FIG. The description will be omitted, and only different points will be described. The video signals of the right facial images of the observers 16 and 17 captured by the camera 14 are as follows:
The image is input to the image processing device 19, and the images 44a and 44b are displayed as they are on the monochrome CRT 12a.
2b is a mirror image of a figure in which the portion other than 44a and 44b corresponds to a light emitting portion, that is, a negative image
A mirror image of the right face image that has been inverted is displayed. In this case, only one light and one camera are required.

(Embodiment 4) FIG. 8 shows the configuration of a stereoscopic image display apparatus according to a fourth embodiment of the present invention.
a and 10b are transmissive liquid crystal displays as spatial modulation elements, and 11a and 11b are focal lengths of 150 m as lenses located on the back surfaces of the spatial modulation elements 10a and 10b, respectively.
m Fresnel lens. Reference numerals 12a and 12b denote black and white CRTs as observer image display devices having a light emitting function.
It is located on the opposite side to a and 10b and is installed at a distance of 160 mm from the lenses 11a and 11b. 27a, 27b are ultrasonic irradiation device, each frequency 100KH _Z, 120
Ultrasonic waves of KH _Z are irradiated to observers 16 and 17.
Reference numerals 28a and 28b denote ultrasonic detecting devices for detecting the ultrasonic waves emitted by the ultrasonic irradiating device, and selectively detect only the frequencies irradiated by the ultrasonic irradiating devices 27a and 27b, respectively. Reference numeral 15 denotes a half mirror for combining images displayed on the spatial modulation elements 10a and 10b into one,
Reference numeral 29 denotes an ultrasonic image output device. Reference numerals 45a and 45b denote figures displayed on the portions corresponding to the right faces of the observers 16 and 17 displayed on the monochrome CRT 12a.
It is a light emitting portion of a.

The operation of the three-dimensional image display device constructed as described above is basically the same as that of the first embodiment of the present invention shown in FIG. Therefore, the description will be omitted, and only different points will be described. The ultrasonic waves of two wavelengths emitted from the ultrasonic irradiation devices 27a and 27b are reflected by the observers 16 and 17, and detected by the ultrasonic detection devices 28a and 28b, respectively. From the detected signal, the ultrasonic image output device 29 converts the monochrome CRT 12
The positions corresponding to the left and right faces of the observer in a and 12b are calculated, and predetermined right and left figures are output and displayed on the black and white CRTs 12a and 12b, respectively. In this case, since it is possible to easily perform processing so as not to emit any light except for the portion corresponding to the observer's face, the right (left) image can be slightly recognized by the left (right) eye due to the influence of disturbance light. Such cross toe of left and right images can be eliminated.

(Embodiment 5) FIG. 9 shows the configuration of a stereoscopic image display apparatus according to a fifth embodiment of the present invention.
a and 10b are transmissive liquid crystal displays as spatial modulation elements, and 11a and 11b are focal lengths of 150 m as lenses located on the back surfaces of the spatial modulation elements 10a and 10b, respectively.
m Fresnel lens. Reference numerals 12a and 12b denote black and white CRTs as observer image display devices having a light emitting function.
It is located on the opposite side to a and 10b, and is installed at a distance of 160 mm from the lenses 11a and 11b. Reference numerals 35a and 35b denote LED lights having wavelengths of 850 nm and 950 nm as illumination devices, which are attached to the observer's head by a headband, and each of them is provided with a light-shielding cover 36. Reference numerals 14a and 14b denote black and white CCD cameras as photographing devices, 15 denotes a half mirror for synthesizing images displayed on the spatial modulation elements 10a and 10b into one, and 16 and 17 denote observers who observe a stereoscopic image.

The operation of the stereoscopic image display apparatus constructed as described above is basically the same as that of the first embodiment of the present invention shown in FIG. Therefore, the description will be omitted, and only different points will be described. LED light 3
Since 5a and 35b are provided on the heads of the observers 16 and 17, respectively, the respective lights illuminate the right and left faces of the observer reliably, and effective lighting conditions are more effective than in the first embodiment. Is wide, so that the movable area of the observer can be widened. The light-shielding cover 36 is provided to prevent the light of an adjacent observer from irradiating another observer.

(Embodiment 6) FIG. 10 shows an application configuration of a stereoscopic image display apparatus to an endoscope according to a sixth embodiment of the present invention. Reference numerals 50a and 50b denote objects for photographing a subject. The lenses 51a and 51b are lens barrels having a built-in optical system for guiding the photographed image, and are installed at an angle corresponding to the angle of convergence of the observer's eyes. 5
Reference numerals 2a and 52b denote CCD cameras, and 53 denotes a stereoscopic image display device described in the first embodiment of the present invention and described with reference to FIG.

The operation of the endoscope apparatus configured as described above will be described. The images of the two subjects captured by the objective lenses 50a and 50b are formed on the CCD cameras 52a and 52b as images for the right and left eyes, respectively, by the lens barrels 51a and 51b having a convergence angle for stereoscopic viewing. And function as a stereoscopic endoscope. The two formed images are respectively displayed on the liquid crystal display 10 of the stereoscopic image display device 53.
a and 10b, are displayed as a pair of stereo images, and are displayed by the function of the stereoscopic image display device 53 described in the first embodiment of the present invention. Stereoscopic vision becomes possible.

[0057]

As described above, according to the structure of the present invention, in a stereoscopic image display device using a pair of stereo images, there is no need for glasses having a function of distributing right and left, and
Even if a large number of observers move at the same time and the observer moves, stereoscopic vision is possible under the same conditions, and a provided image can be realized without flicker because continuous images are provided. This greatly contributes to the practical application of stereoscopic endoscope devices and the expansion of applications.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a stereoscopic image display device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating an operation of the stereoscopic image display device according to the first embodiment of the present invention.

FIG. 3 is a characteristic diagram showing a light emission wavelength distribution of a light used in the stereoscopic image display device according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a photographing device used in the stereoscopic image display device according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating an operation of the stereoscopic image display device according to the first embodiment of the present invention.

FIG. 6 is a configuration diagram of a stereoscopic image display device according to a second embodiment of the present invention.

FIG. 7 is a configuration diagram of a stereoscopic image display device according to a third embodiment of the present invention.

FIG. 8 is a configuration diagram of a stereoscopic image display device according to a fourth embodiment of the present invention.

FIG. 9 is a configuration diagram of a stereoscopic image display device according to a fifth embodiment of the present invention.

FIG. 10 is a configuration diagram of a stereoscopic image display device according to a sixth embodiment of the present invention.

FIG. 11 is a configuration diagram of a first conventional stereoscopic image display device.

FIG. 12 is a configuration diagram of a second conventional stereoscopic image display device.

[Explanation of symbols]

 10a, 10b Transmission liquid crystal display 11a, 11b Lens 12a, 12b Monochrome CRT 13a, 13b LED 14a, 14b Monochrome CCD camera 15 Half mirror 16, 17 Observer 18 Difference processing device 19 Image processing device 27a, 27b Ultrasonic irradiation device 28a , 28b Ultrasonic detection device 29 Ultrasonic image output device 30 Imaging lens 31a, 31b Interference filter 32 Imaging device 33 Drive circuit 35a, 35b LED 36 Light shielding cover 50a, 50b Objective lens 51a, 51b Lens barrel 52a, 52b CCD camera 53 Stereo Image display device

────────────────────────────────────────────────── ─── Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G02B 27/22 H04N 13/04 JICST file (JOIS)

Claims (1)

(57) [Claims] 1. A pair of spatial modulation elements having a light transmitting property for displaying a stereo image, a pair of observer image display devices for illuminating each of the spatial modulation elements from a back surface, and the spatial modulation element. A pair of lenses having directivity positioned between the observer image display devices, a half mirror for combining images displayed on the pair of spatial modulation elements into one, a right face and a left face of the observer Two different infrared faces
A pair of illumination devices for illuminating at a line wavelength,
Selective imaging for each of the infrared wavelengths of the illuminator
And a pair of imaging devices for photographing a viewer that can, each of the pair of the observer image display device, the one
A three-dimensional image display device for displaying a figure for illuminating the spatial modulation element at a position corresponding to the right face and a position corresponding to the left face of the observer photographed by the pair of photographing devices.