JPH07159725A - Stereoscopic picture display device - Google Patents

Abstract

PURPOSE:To provide a stereoscopic picture display device by which spectacles for distributing pictures to right and left eyes are not required and plural observers can move including forward and backward moving, and which imposes little restriction in terms of a place where the observer stands. CONSTITUTION:The picture for a right eye and the picture for a left eye are respectively displayed on spatial modulation element 10a and 10b; and the pictures of the right and left halves of an observer's face photographed by right and left photographing devices 14a, 14b, 14c and 14d are respectively displayed on observer picture display devices 12a and 12b; then lenses 11a and 11b having directivity are used so that the picture for a right eye and the picture for a left eye which are synthesized to one by a half mirror 15 can be observed only with the observer's right eye and left eye by illuminating the pictures of the right and left halves of the observer's face. The pictures are displayed in accordance with the place where the observer stands.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display device used for industrial, household or medical purposes.

[0002]

2. Description of the Related Art As a conventional stereoscopic image display device, an observer wears spectacles having a function of distributing left and right to display stereo images for the right eye and the left eye which are time-divisionally displayed on an image display surface. Those that can be observed only by the right and left eyes of the observer, respectively, or a lenticular plate is attached to the image display surface, the image distribution function of the lenticular plate, a stereo image for the right eye and the left eye It is general that the above can be observed only by the right and left eyes of the observer.

FIG. 12 shows an example of the configuration of the conventional stereoscopic image display device. Reference numeral 60 is spectacles having a left / right distribution function, 61a and 61b are liquid crystal shutters, and 62 is a liquid crystal shutter.
Is a synchronizing circuit, and 63 is a color CRT as an image display device. The operation of the stereoscopic image display device according to the first example of the related art configured as described above will be described. Color CRT 63
, The stereo images for the right eye and the left eye are alternately displayed in a time division manner. The liquid crystal shutter 61a of the spectacles 60 is opened and becomes transparent only when the right-eye stereo image is displayed, and the liquid crystal shutter 61b is opened and transmitted only when the left-eye stereo image is displayed. By controlling the open / closed state by the synchronizing circuit 62 so that the state becomes the state, the observer wearing the spectacles 60 observes only the stereo image for the right eye with the right eye and only the stereo image for the left eye with the left eye. Stereoscopic vision is performed by observing.

FIG. 13 shows a structure of a stereoscopic image display device in a second conventional example. Reference numeral 71 is a lenticular plate in which a large number of cylindrical lenses are formed in stripes, and 72 is a color CRT as an image display device. is there. 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 simultaneously displayed alternately in a slit shape having a width that is approximately half the stripe width of the lenticular plate 71. The right eye of the observer is the lenticular plate 7.
Only the stereo image for the right eye displayed in the slit shape is observed through each of the cylindrical lenses 1 and the left eye similarly observes only the stereo image for the left eye displayed in the slit shape. This allows stereoscopic viewing.

[0005]

However, according to the study by the present inventors, in the stereoscopic image display device in the first conventional example as described above, the stereo image is independent of the right and left eyes of the observer. Since eyeglasses having a left / right distribution function are indispensable for observing images, the observer feels annoyance, and the stereo image to be displayed needs to be switched between the right eye image and the left eye image in time division. Therefore, there is a problem that flicker occurs in an image, which becomes an obstacle in observing a stereoscopic image.

Further, in the stereoscopic image display device of the second conventional example, since the stereoscopic image is observed through the stripe-shaped lens, the spatial tolerance of the stereoscopically visible observer is narrow and the observer moves. In this case, the image is deteriorated, and it is difficult for a large number of people to observe the image at the same time. Further, the image processing is required to display the image in a stripe shape, which makes the apparatus expensive. Had a problem.

Further, in the medical field, when an endoscopic operation is performed, the operation is usually performed by an operator observing a plane image of the patient's abdominal cavity projected by the endoscope on a monitor. However, the monitor image in the abdominal cavity has few features because the entire abdominal cavity has a single color, and it becomes difficult to confirm the perspective of the affected area, which tends to lengthen the operation time and burden the patient and the operator. Was also great. On the other hand, when the stereoscopic image display devices of the above-described first and second conventional examples are used, left and right spectacles, flickering of images, and annoyance due to restriction of movement of an observer impede practical application. This is the current situation. Further, in the case where there are a plurality of observers and the observation positions of the observers are forward and backward, it has been a hindrance to further practical use in the past.

The present invention does not require spectacles having a left / right distribution function, allows a large number of people to stereoscopically view at the same time without depending on positions including front and rear of a plurality of observers, and has a flicker-free stereoscopic image. An object is to provide a display device.

[0009]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide, in the configuration of a stereoscopic image display device, a pair of spatial light modulators having light transmissivity for displaying a stereo image, and the spatial light modulator. A pair of observer image display devices for respectively illuminating from the back surface, a pair of lenses having directivity located between the spatial modulator and the observer image display device, and displayed on the pair of spatial modulators. A pair of a half mirror for synthesizing one image into one image, a photographing device having a plurality of sensitive characteristics for photographing an observer, and a light source having a characteristic corresponding to the sensitive characteristic of each photographing device. The position corresponding to the right and left faces corresponding to the front and back positions of the observer photographed by the photographing device is provided in each of the pair of observer image display devices. The is achieved by the three-dimensional image display apparatus characterized by displaying a graphic for illuminating the spatial modulation element.

Further, a light modulating spatial modulator for displaying a stereo image in a time division manner, an observer image display device for certifying the spatial element from the back side, the spatial modulator and the observer image. A pair of a directional lens positioned between the display devices, a photographing device having a plurality of sensitive characteristics for photographing the observer, and a light source having a characteristic corresponding to the sensitive characteristic of the photographing device are provided to the observer. The spatial light modulator is provided at the position corresponding to the right and left faces corresponding to the front and back positions of the observer photographed by the photographing device in the observer image display device. This is achieved by a stereoscopic image display device characterized in that a figure for illuminating is displayed in synchronism with time-divisional display of the spatial modulation element.

Further, the stereoscopic image display device includes an infrared illuminating device for illuminating the right or left face of an observer, and the photographing device is capable of selectively picking up an image with respect to the infrared wavelength of the illuminating device. Preferably. Also,
In the stereoscopic image display device, it is preferable that the image output surface of the observer image display device is installed outside the focal length of the lens.

Further, in the stereoscopic image display device, it is preferable to use a transmissive liquid crystal display or a light transmissive film as the spatial modulation element. Furthermore, in the three-dimensional image display device, it is preferable to use a lamp unit that emits infrared rays or an LED having an emission wavelength in the infrared region as an illumination device.

[0013]

The present invention provides a three-dimensional image display device according to the present invention,
Since a pair of lighting devices for illuminating the right and left faces of the observer with different wavelengths and a plurality of pairs of photographing devices in the front and rear (depth direction) are provided, the observer moving forward and backward and a plurality of observations gathered with depth It is possible to display an image without being affected by the position of the person.

Further, in the three-dimensional image display device of the present invention, the illumination devices are arranged in the depth direction in accordance with the expected position of the observer, so that the image corresponding to a plurality of observers gathered with a depth instead of one line. Display can be taken. In this stereoscopic image display device, the figure that matches the right facial image of the observer displayed on the observer image display device (right) is incident on only the periphery of the right eye of the observer through the lens having directivity, The right eye of the person sees a figure corresponding to the right facial image of the observer as a virtual image, and the image for the right eye displayed on one side of the spatial light modulator is illuminated from the back side. At this time, the left face portion of the observer image displayed on the observer image display device (right) by the lens having the directivity enters the left eye of the observer,
Since this part does not emit light, the right-eye image cannot be seen by the left eye of the observer.

Similarly, for the image for the left eye, the image for the left eye displayed on the other side of the spatial modulation element is displayed on the observer image display device (left) from the back side by the lens having directivity. Only the figure corresponding to the left facial image of is illuminated as illumination, and the observer's left eye observes only the image for the left eye, and the observer's right eye cannot observe it.

Here, the lens having directivity may be any lens that causes a selection action to the left and right, and is preferably a convex lens or a Fresnel lens. The figure displayed on the observer image display device may be the half-face image of the face of the observer as it is, but it is more preferable to process the obtained half-face image of the observer and use a figure in which extra information around the face is deleted. . There are various possible methods for synthesizing the image for the right eye and the image for the left eye obtained in this manner, but two observer image display means, two lenses and two spatial modulation elements are provided,
Each of them is independently used for the right eye and the left eye, and is combined using a half mirror, or alternately displayed in time division while synchronizing the display of the observer image display device and the display of the spatial modulation element. The method is preferred. The former is more preferable in that there is no image flicker, and the latter is more preferable in that the number of parts is small and the device can be downsized. Further, when the observer moves, the observer's own half-plane image displayed on the observer image display device also follows, so that the above-mentioned stereoscopic viewing condition is maintained. For the same reason, even when there are a large number of observers, each observer can perform stereoscopic viewing.

Further, the present invention comprises an illuminating device for illuminating the right or left face of the observer, wherein the illumination of the illuminating device is an infrared illumination which is not recognized by the observer, and the photographing device is an infrared ray of the illuminating device. By making it possible to pick up an image selectively with respect to the wavelength, it is possible to eliminate the influence of ambient light and easily obtain a half-face image of each face of the observer without causing discomfort to the observer.

Further, the stereoscopic image display device of the present invention removes the image other than the face of the observer by subtracting the two observer images photographed by the pair of left and right photographing devices.
The influence of ambient light when the observer image display device illuminates the spatial modulation element can be eliminated. Further, the stereoscopic image display device of the present invention photographs either the right face or the left face of the observer by the photographing device and the lighting device,
One of the pair of observer image display devices displays a half-face image of the face photographed by the photographing device, and the other one displays a negative / positive inverted image of the half-face image of the face, thereby forming one photographing device. With this, it is possible to substitute the functions of two units.

[0019]

EXAMPLES Examples of the present invention will be described below, but prior to the description, some examples included in prior applications of the same applicant will be described as reference examples. Reference Example 1 In the reference example of FIG. 1, 10a and 10b are transmissive liquid crystal displays as spatial modulators, and 11
Reference numerals a and 11b are Fresnel lenses having a focal length of 150 mm as lenses located on the back surfaces of the spatial modulation elements 10a and 10b, respectively. Reference numerals 12a and 12b are black and white CRTs as observer image display devices having a light emitting function, and the lens 11
a and 11b are sandwiched between the spatial modulation elements 10a and 10a, respectively.
It is located on the side opposite to b, is farther than the focal lengths of the lenses 11a and 11b, and is located 160 mm away from the lenses 11a and 11b. 13a and 13b are lighting devices,
LED lights with wavelengths of 850 nm and 950 nm,
14a and 14b are black and white CCD cameras as photographing devices,
Reference numeral 5 denotes a half mirror for synthesizing the images displayed on the spatial modulation elements 10a and 10b into one, and 16 and 17 denote observers for observing stereoscopic images.

FIG. 2 shows a state in which the observers 16 and 17 are illuminated from the front by the LEDs 13a and 13b, and 20a and 20b indicate areas where the lights of the LEDs 13a and 13b are applied, respectively. FIG. 3 shows the LEDs 13a,
13b shows the emission wavelength characteristic of 13b, and the characteristic 25a is L
Reference numeral 25b of the ED 13a indicates the wavelength distribution of the LED 13b, and reference numerals 26a and 26b indicate regions selectively transmitted by the wavelength filters mounted on the black and white CCD cameras 14a and 14b, respectively.

FIG. 4 shows the black and white CCD cameras 14a and 14b.
3 is a cross-sectional view of the image pickup device, 30 is an imaging lens, 31a and 31b are interference filters as wavelength filters, and 32 is a CCD.
An image pickup device containing a chip, 33 is a drive circuit of the image pickup device,
Reference numeral 34 indicates a subject. FIG. 5 shows a state in which the observer observes his / her own face image as a virtual image in the reference example shown in FIG. 1. For the sake of clarity, an observer image display device (black and white CRT) and one lens are provided. Only a half mirror, a liquid crystal display, and another lens and an observer image display device are omitted. Reference numeral 11a is a lens, 12a is a black and white CRT, 16 and 17 are two observers for observing a stereoscopic image, and 40, 41, 42 and 43 are observation images among the observer images displayed on the screen of the monochrome CRT 12a. The area actually viewed by a person is shown.

The operation of the stereoscopic image display device configured as described above will be described with reference to FIGS. 1 to 5. The stereo images observed by the observers 16 and 17 in FIG. 1 are the liquid crystal display 10b in which the right-eye image is displayed on the liquid crystal display 10a and the left-eye image is a left-right inverted mirror image.
, And the two stereo images are combined into one screen by the half mirror 15.
More specifically, in FIG. 1, for example, CR
The image on the right side of T12a (actually the right face) corresponds to the right face of the observer 17, and the liquid crystal display 10a is driven by the image when viewed by the right eye. Similarly, the left face image viewed by the left eye of the observer 17 is also displayed on the CRT 12b as a backlight, and the liquid crystal display 10b is driven by the image when viewed to the left. Since these two images are combined by the half mirror, they appear as a stereoscopic image to the observer.
Further, the image on the left side of the CRT 12a (actually the right face) corresponds to the right face of the observer 16, and the liquid crystal display 10a
Is driven by the image seen by the right eye. Similarly CRT
The image of the left face seen by the left eye of the observer 16 is also displayed on 12b as a backlight.
Is driven by the image viewed by the left eye, and the two images are combined by the half mirror, so that the viewers 16 and 17 can observe a stereoscopic image.

As shown in FIG. 2, the LEDs 13a and 13b arranged on both sides of the front of the observers 16 and 17 are, as shown in FIG. 2, the LED 13a in the right half surface region 20a of the observers 16 and 17 and the LED 13b in the face. Observer 16
And 17 so as to illuminate the left half area 20b of the face. The emission wavelengths of the LEDs 13a and 13b are 850 nm and 951 n, respectively, as shown in FIG.
Since it has distributions 25a and 25b centered on m, and the light intensities in the overlapping regions are both half values or less, they can be used as two different wavelength light sources.
On the other hand, in the CCD cameras 14a and 14b, as shown in FIG. 4, interference filters 31a and 31b having transmission characteristics of wavelengths 850 ± 20 nm and 950 ± 20 nm are inserted between the image pickup device 32 and the image pickup lens 30, respectively. Therefore, when the subject 34 forms an image on the image sensor 32, only the portions illuminated by the wavelength regions 26a and 26b in FIG. 3 remain as an image. Therefore, according to the configuration described above, CC
The D camera 14a photographs only the area 20a in FIG. 2 and displays it on the monochrome CRT 12a, and the CCD camera 14b.
Is a black and white CRT by shooting only the area 20b in FIG.
12b can be displayed. Black and white CRT 12a,
The images of the observers 16 and 17 taken by the CCD cameras 14a and 14b are vertically inverted and displayed on the screen 12b. At this time, the face areas 20a and 20b are displayed in white and high brightness so that the black and white CRTs 12a and 12b are displayed. The brightness and contrast, and the lens diaphragms of the CCD cameras 14a and 14b are adjusted.

Next, the operation of the Fresnel lenses 11a and 11b will be described with reference to FIG. Fresnel lens 11
a is installed so that the observer images displayed on the black and white CRT 12a can be observed by the observers 16 and 17 as virtual images.
By setting the distance from the black-and-white CRT 12a outside the focal length of the Fresnel lens 11a, the right and left eyes of the observer 16 are provided with the areas 4 on the screen of the black-and-white CRT 12a.
0 and 41 only, and black and white C for the right and left eyes of the observer 17
Only the regions 42 and 43 on the screen of the RT 12a can be independently observed and can be enlarged and observed with the effective diameter of the Fresnel lens 11a as a limit. Therefore, when the regions 40 and 42 are light emitting surfaces, the observer 16,
It is possible for 17 to act as an illumination having selectivity to the right eye of a size corresponding to the effective diameter of the Fresnel lens 11a. At this time, since the regions 41 and 43 do not emit light,
The light from the monochrome CRT 12a does not enter the left eye. 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 monochrome CRT as described above
The observers 16 and 17 in FIG.
The right half surface region 20a of the face of the
By making it correspond to the region of FIG. 5, the observers 16 and 17 observe a bright virtual image only in the right eye, and make the left half surface region 20b in FIG. 2 displayed on the monochrome CRT 12b correspond to the regions 41 and 43 in FIG. As a result, the observers 16 and 17 will observe a bright virtual image only in 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 by being illuminated from the back surface only for the right eyes of the observers 16 and 17, and the liquid crystal can be observed. The stereo image for the left eye displayed on the display 10b is the observer 1
Since only the left eyes of 6 and 17 are illuminated from the back side for observation, the observers 16 and 17 can observe a pair of stereo images at the same time, and stereoscopic vision is possible. Even if the observers 16 and 17 move, the LE shown in FIG.
As long as the illumination condition of D is maintained, stereoscopic viewing is possible.

In the reference example, a transmissive liquid crystal display was used as the spatial modulation element, but the spatial modulation element may be any one that has optical transparency and can display a stereo image. It may be a recorded film. Further, the LED used as the light may be one that can emit two different wavelengths in the infrared wavelength region, and may be, for example, a halogen lamp equipped with a wavelength filter to limit the emission wavelength band.

Reference Example 2 FIG. 6 shows the configuration of a stereoscopic image display device according to Reference Example 2 of the present invention.
a and 10b are transmissive type influence displays as spatial modulation elements, and 11a and 11b are focal lengths of 150 m as lenses located on the back surface of the spatial modulation elements 10a and 10b, respectively.
m Fresnel lens. Reference numerals 12a and 12b are black and white CRTs as observer image display devices having a light emitting function, and the spatial modulation element 10 is sandwiched between the lenses 11a and 11b.
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 illuminators having LEs with wavelengths of 850 nm and 950 nm, respectively.
D light, 14a, 14b are black and white CCD as a photographing device
The camera, 15 is a half mirror for combining the images displayed on the spatial modulation elements 10a, 10b into one, 16, 1
Reference numeral 7 denotes an observer who observes a stereoscopic image, and 18 denotes a difference processing device.

Since the operation of the stereoscopic image display device configured as described above is basically the same as that of the reference example 1 shown in FIG. 1, the same parts are designated by the same reference numerals and the description thereof will be omitted. Only different points will be described. The video signals of the facial images of the observers 16 and 17 which are separately captured by the cameras 14a and 14b are input to the difference processing device 18 and are subtracted from each other, and then output to the black and white CRTs 12a and 12b, respectively. Since the common part in the two images is canceled by the difference processing described above, it is possible to remove the image necessary for the configuration of the stereoscopic image display device such as the background of the observers 16 and 17.

Reference Example 3 FIG. 7 shows the configuration of a stereoscopic image display device according to Reference Example 3 of the present invention.
a and 10b are transmissive type influence displays as spatial modulation elements, and 11a and 11b are focal lengths of 150 m as lenses located on the back surface of the spatial modulation elements 10a and 10b, respectively.
m Fresnel lens. Reference numerals 12a and 12b are black and white CRTs as observer image display devices having a light emitting function, and the spatial modulation element 10 is sandwiched between the lenses 11a and 11b.
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 illuminating device, 14 is a black and white CCD camera as a photographing device, 15 is a half mirror for combining the images displayed on the spatial modulation elements 10a and 10b into one,
16 and 17 are observers for observing stereoscopic images, and 19
Indicates an image processing apparatus. 44a and 44b are monochrome CRT1
2a is a right facial image of the observers 16 and 17 displayed on 2a,
It is a light emitting portion of the black and white CRT 12a.

Since the operation of the stereoscopic image display device constructed as described above is basically the same as that of the reference example shown in FIG. 1, the same parts are designated by the same reference numerals and the description thereof will be omitted.
Only different points will be described. The video signals of the right facial images of the observers 16 and 17 picked up by the camera 14 are input to the image processing device 19, and the images 44a and 44b as they are are displayed on the monochrome CRT 12a and 44 on the monochrome CRT 12b.
The mirror image of the figure corresponding to the light emitting portion except the portions a and 44b, that is, the mirror image of the right facial image which has been negative / positive inverted by the image processing device 19 is displayed. In this case, the LED
One light and one CCD camera are enough.

(Embodiment 1) FIG. 8 shows the structure of a stereoscopic image display apparatus according to Embodiment 1 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 surface of the spatial modulation elements 10a and 10b, respectively.
m Fresnel lens. Reference numerals 12a and 12b are black-and-white CRTs as observer image display devices having a light emitting function, and the spatial modulation element 10 is formed by narrowing the lenses 11a and 11b.
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, 13b, 13
c and 13d have wavelengths of 900 nm as illumination devices,
850nm, 950nm, 800nm LED lights,
Reference numerals 14a, 14b, 14c and 14d are black and white CCD cameras as image capturing devices, 15 is a half mirror for combining images displayed on the spatial modulation elements 10a and 10b into one,
Reference numerals 1, 2, and 3 are observers who observe stereoscopic images, respectively.
Reference numerals a and 80b denote signal processing circuits.

Here, the LED 13a and the LED 13b mainly collate the observers 1 and 2 located in the front,
3c and the LED 13d are mainly located in the rear of the observer 3
It is installed so that it illuminates. Black and white CCD cameras 14a, 14
b, 14c and 14d have transmission wavelengths of 900 ± 1
0 nm, 850 ± 10 nm, 950 ± 10 nm, 800
Equipped with a wavelength filter of ± 10 nm, each LED1
Only the face image of the observer illuminated from 3a, 13b, 13c, 13d is captured. Observer 1, 2 or 3 imaged
The video signal of the facial image of the
Enter b. The signal processing circuit 80a (or 80b) is
An observer image (here, 1 and 2) taken by the black and white CCD camera 14a (or 14b) and the black and white CCD camera 14a
(Or 14b) and the observer image (here, 3) photographed are superimposed or divided on the monochrome CRT 12a (or 12b) screen to be displayed. Here, the classification method corresponds to the irradiation area of the LED necessary for selectively illuminating only the right (or left) face according to the front-back position (depth, direction) of the observer.

That is, the right face of the viewers 1 and 2 illuminated by the LED light 13a is photographed by the CCD camera 14a. The left face of the viewers 1 and 2 illuminated by the LED light 13b is photographed by the CCD camera 14b. In addition, the right side of the irradiation observer 3 is CCed by the LED light 13c.
The image is taken by the D camera 14c. Similarly, the left face of the observer 3 illuminated by the LED light 13d is photographed by the CCD camera 14d. Therefore, the photographed image of the right face of the observer is given to the signal processing circuit 80a, and the photographed image of the left face of the observer is given to the signal processing circuit 80b.

Since the operation of the stereoscopic image display device configured as described above is basically the same as that of the reference example shown in FIG. 1, the same parts are designated by the same reference numerals and the description thereof will be omitted.
Only different points will be described. In this example, among the observers 1-3, the observers 1 and 2 on the front side have the LED 13a and the LED 1
Illuminated by 3b. The observer on the back side is the LED 13
It is illuminated by the LED 13d. As shown in this example, the LEDs are installed with a depth so that they can illuminate a wide area according to the depth of the observer's depth. , Many observers can participate.

In this embodiment, an LED having four characteristics
I used four cameras and provided four image capturing devices to deal with these characteristics. However, if a camera that can decompose multiple frequency bands with a single camera can be used, there is only one image capturing device. . In contrast to the present embodiment, one for performing difference processing of the left and right half-face images displayed on the observer image display device as shown in Reference Example 2 and one CCD camera as shown in Reference Example 3 are used. It is needless to say that it is possible to apply an image in which only the half face of the observer is photographed, and the half face image is displayed on one side and the Ega-positive inverted image is displayed on the other side.

(Second Embodiment) FIG. 9 shows a stereoscopic image display apparatus according to a second embodiment of the present invention. The feature of this embodiment is that the observer photographing unit 200 of FIG. 8 photographs the observer. Images of the right and left faces of the observers 1 to 3 are alternately displayed on the black and white CRT 12, and the spatial modulation element 10 is driven by the right eye image and the left eye image in time division in synchronization with this, and a stereo image is presented to the observer. Is to be observed.
Next, the configuration and operation of this embodiment will be described focusing on the differences from the above-described first embodiment.

In FIG. 9, 10 is a transmissive liquid crystal display as a spatial modulation element, and in this embodiment,
Only one spatial modulator is used. Reference numeral 11 denotes a lens located on the back surface of the spatial light modulator 10 and has a focal length of 150 m.
m Fresnel lens. Reference numeral 12 denotes one black and white CRT as an observer image display device having a light emitting function, which is located on the opposite side of the spatial modulation element 10 with the lens 11 narrowed and is installed at a distance of 160 mm from the lens 11. 21
Reference numeral 0 is a synchronization and image processing circuit, and 220 is a stereo image output device.

In FIG. 10, which is a functional block diagram of the synchronization and image processing circuit 210, the right facial images 14a and 14c and the left facial images 14b and 14 output from the photographing unit 200 are shown.
From d, observer images are obtained from the signal processing circuits 80a and 80b. In addition, the right-eye image 2 from the stereo image output device 220
22 and the left-eye image 224 are given to the time division circuit 212. The outputs of the signal processing circuits 80a and 80b are also given to the time division circuit 212. The time division circuit 212 uses the right facial image 8
Select the 0a side and use this as a backlight for monochrome CR
Display at T12. At this time, the right-eye image 222 is selected and output to the spatial modulation element 10. On the other hand, the left facial image 80b
Select the side and use this as a backlight for monochrome CRT1
2, the left eye image 224 is selected and the spatial modulation element 1 is displayed.
Output to 0. Therefore, a stereoscopic image is provided to each observer.

(Embodiment 4) FIG. 11 shows an application configuration of the stereoscopic image display device to an endoscope in the first embodiment of the present invention shown in FIG. Objective lenses 51a and 51b are lens barrels having a built-in optical system for guiding the photographed image,
It is installed at an angle corresponding to the vergence angle of the observer's eyes. Reference numerals 52a and 52b are CCD cameras, and 53 is the stereoscopic image display device described as the first embodiment of the present invention and described with reference to FIG.

The operation of the endoscope device 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 eye and the left eye by the lens barrels 51a and 51b having a convergence angle for stereoscopic vision, respectively. Functions as a stereoscopic endoscope. The two formed images are the liquid crystal display 10a of the stereoscopic image display device 53,
10b is input and displayed as a pair of stereo images, and by the function of the stereoscopic image display device 53 described in the first embodiment of the present invention, stereoscopic viewing of images captured by the stereoscopic endoscope by a large number of observers. Is possible.

[0042]

As described above, according to the configuration of the present invention, a pair of illuminating devices for illuminating the right and left faces of an observer with infrared rays of two different wavelengths are used before and after using different wavelengths. The imaging device having a plurality of pairs and corresponding to each illumination is provided with a wavelength filter that selectively transmits each of the infrared wavelengths of each of the illumination measures, thereby eliminating the influence of light or disturbance light on the other side, and observing. The right facial image and the left facial image of the observer can be easily obtained without giving discomfort to the observer, and the image display means corresponding to the plurality of observers positioned in front and behind can be provided.

Therefore, it is possible to perform stereoscopic viewing under the same conditions for a large number of observers at the same time and even if the observers move, without the need for eyeglasses having the function of sorting left and right. Therefore, an apparatus without flicker can be realized, which greatly contributes to the practical application and expansion of applications of the stereoscopic image display apparatus and the stereoscopic endoscope apparatus.

[Brief description of drawings]

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

FIG. 2 is an operation explanatory diagram of the stereoscopic image display device in Reference Example 1 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 in Reference Example 1 of the present invention.

FIG. 4 is a cross-sectional view of a photographing device used for a stereoscopic image display device in Reference Example 1 of the present invention.

FIG. 5 is an operation explanatory diagram of the stereoscopic image display device in Reference Example 1 of the present invention.

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

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

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

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

FIG. 10 is a functional block diagram of a synchronization and image processing circuit.

FIG. 11 is a configuration diagram of a stereoscopic image display device according to a third embodiment of the present invention.

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

FIG. 13 is a configuration diagram of a stereoscopic image display device of a second conventional example.

[Explanation of symbols]

 1, 2, 3, 16, 17 Observers 10a, 10b Transmissive liquid crystal displays 11a, 11b Lenses 12a, 12b Monochrome CRT 13a, 13b, 13c, 13d, LEDs 14a, 14b, 14c, 14d, Monochrome CCD camera 15 Half mirror 18 Difference Processing Device 19 Image Processing Device 30 Imaging Lens 31a, 31b Interference Filter 32 Imaging Device 33 Drive Circuit 80a, 80b Signal Processing Circuit

Claims (2)

[Claims] 1. A pair of light-transmitting spatial modulators for displaying a stereo image, a pair of observer image display devices for illuminating the spatial modulators from their respective back surfaces, and the spatial modulators. A pair of lenses having directivity positioned between the observer image display devices, a half mirror for combining the images displayed on the pair of spatial modulation elements into one, and a photographer for photographing the observer. A pair of photographing devices having a plurality of sensitive characteristics and a light source having a characteristic corresponding to the sensitive characteristics of each of the photographing devices is provided according to the front-back position of the observer,
In order to illuminate the spatial modulator on each of the pair of observer image display devices, a position corresponding to the right face and a position corresponding to the left face corresponding to the front-back position of the observer photographed by the photographing device. A stereoscopic image display device characterized by displaying the figure. 2. A spatial modulation element having a light-transmitting property for displaying a stereo image in a time division manner, an observer image display device for certifying the spatial element from the back side, the spatial modulation element and the observer image. A pair of a directional lens positioned between the display devices, a photographing device having a plurality of sensitive characteristics for photographing the observer, and a light source having a characteristic corresponding to the sensitive characteristic of the photographing device are provided to the observer. The spatial light modulator is provided at the position corresponding to the right and left faces corresponding to the front and back positions of the observer photographed by the photographing device in the observer image display device. A stereoscopic image display device, wherein a figure for illuminating is displayed in synchronization with time-divisional display of the spatial modulation element.