JPH0898215A - Stereoscopic picture display device - Google Patents

Abstract

PURPOSE: To simplify a photographing device and to eliminate a need of the device which recognizes an observer image by moving the observer image on the display screen of an observer image display device to the right and the left from the normal display position. CONSTITUTION: Before display of a stereoscopic picture, cameras 82a and 82b of the photographing device are moved to the right and the left in parallel by about a half of observer's face. Thus, images corresponding to right and left half images of observer's face on the display screens of observer image display devices 12a and 12b are moved in directions of arrows X and Y in parallel by about a half of observer's face when the observer exists in the front. By this constitution the stereoscopic picture display device is obtained which simplifies the photographing device consisting of an infrared lamp 81, cameras 82a and 82b, etc., and doesn't require the device, which recognizes the observer image, to have a simple constitution, and the device is miniaturized.

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 is in a transmissive state only when a right-eye stereo image is displayed, and the liquid crystal shutter 61b is opened and is in a transmissive state only when a left-eye stereo image is displayed. By controlling the open / closed state by the synchronization circuit 62, the observer wearing the eyeglasses 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. This allows stereoscopic viewing.

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 conventional second example 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 it at an arbitrary position, and it is necessary to perform image processing for displaying the image in stripes. It had a problem of becoming expensive.

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 first and second stereoscopic image display devices of the related art are used, the left and right spectacles, the flickering of the image, the annoyance due to the limitation of the movement of the observer, and the like prevent the practical use. is the current situation.

In view of the above-mentioned drawbacks of the prior art, the present inventors photographed an observer with a photographing device, and illuminate the display on a display device corresponding to the photographed observer from the backside with a spatial modulation element. Therefore, we proposed a stereoscopic image display device that does not require glasses having a function of sorting left and right, allows a large number of people to stereoscopically view at the same time without depending on the position of an observer, and has a flicker-free screen.

However, in order to display on a display device corresponding to the above-mentioned observer, usually, two infrared lamps having different wavelengths and two cameras are required, and one infrared camera and one camera are required. In order to realize it, a device for recognizing an observer image is required between the camera and the display device, which makes the device complicated. INDUSTRIAL APPLICABILITY The present invention does not require glasses having a function of distributing left and right, allows a large number of people to stereoscopically view at the same time without depending on the position of an observer, and has a flicker-free screen, and an infrared lamp, a camera, or the like. An object of the present invention is to provide a stereoscopic image display device having a simple structure that does not require a device for recognizing an observer image while simplifying the device.

[0010]

In order to solve this problem, a stereoscopic image display apparatus of the present invention has a light modulating spatial modulator for displaying a stereo image and the spatial modulator from the back surface. An observer image display device for illuminating, an optical element having directivity for enlarging a display portion of the observer image display device, and a photographing device for photographing the observer, and the observer image The display device displays the observer image photographed by the photographing device by moving it to the left by about half of the face of the observer, and uses it as a light source corresponding to the right face of the observer, It is characterized in that it is moved to the right by about half and displayed, and the spatial modulation element is illuminated from the back surface as a light source corresponding to the left face of the observer.

Further, the stereoscopic image display device of the present invention includes a spatial light modulator having a light transmitting property for displaying a stereo image, an observer image display device for illuminating the spatial light modulator from the rear surface, An observer image display device is provided with an optical element having directivity for enlarging the display portion and a photographing device for photographing the observer, and the photographing device, when photographing the observer image, the observer. By illuminating the face image of the observer from the back side by deciding the photographing direction so that the position of the observer image displayed on the image display device is moved by about half of the observer's face and displayed. It is characterized in that it is used as a light source for

The stereoscopic image display device of the present invention includes a spatial light modulator having a light transmissive property for displaying a stereo image, an observer image display device for illuminating the spatial light modulator from the back side, An observer image display device is provided with an optical element having directivity for enlarging the display portion, and a photographing device for photographing the observer, and the photographing device is used to set the center of gravity from the photographed face image of the observer. By detecting and displaying the face image of the observer on the observer image display device such that the side end portions are aligned with the position of the center of gravity, thereby providing a light source for illuminating the spatial modulation element. Is characterized by.

[0013]

With such a structure, the observer image on the display screen of the observer image display device is displayed by moving it to the left and right by about half of the face from the normal display position. A simple structure that does not require a device for recognizing an observer image can be realized while simplifying the photographing device.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below, but prior to this 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.
Reference numerals a and 11b are Fresnel lenses having a focal length of 150 mm as optical elements 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. Figure 2
The situation where the observers 16 and 17 are illuminated from the front by the LEDs 13a and 13b is shown. Reference numerals 20a and 20b indicate areas illuminated by the lights of the LEDs 13a and 13b, respectively.

FIG. 3 shows the emission wavelength characteristics of the LEDs 13a and 13b.
5b shows the wavelength distribution of the LED 13b, and 26a, 2
Reference numeral 6b indicates a region selectively transmitted by the wavelength filters mounted on the black and white CCD cameras 14a and 14b, respectively. FIG. 4 is a sectional view of the black and white CCD cameras 14a and 14b, 30 is an image pickup lens, 31a and 31b are interference filters as wavelength filters, 32 is an image pickup device containing a CCD chip, and 33 is a drive circuit for the image pickup device. , 34 denote subjects.

FIG. 5 shows a manner in which the observer observes his or her own facial image as a virtual image in the reference example shown in FIG. 1. For the sake of clarity, the observer image display device (black and white C
RT) and a lens are shown one by one, 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 stereoscopic images, and 40, 41, 42 and 43 are black and white CRTs 1.
The area actually observed by the observer in the observer image displayed on the screen 2a is shown.

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 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 an image for viewing with the right eye. Similarly, the image of the left face 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 for the left eye to see. Since these two images are combined by the half mirror, they appear as a stereoscopic image to the observer 17. 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 an image for viewing with the right eye. Similarly CRT
The image of the left face of the observer 16 is also displayed on 12b as a backlight, and the liquid crystal display 10b is driven by the image to be seen by the left eye, and the two images are combined by the half mirror. Can be observed.

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. 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 950 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, if the regions 41 and 43 are not made to 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 as that of the Fresnel lens 11b.
The light coming from only enters the left eye.

Therefore, the above-mentioned black and white CRT
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 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 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 first embodiment 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.

(Embodiment 1) FIGS. 7 and 8 are views showing an example of the arrangement of a photographing apparatus and an observer image display apparatus in this embodiment. 7 shows a light source for the right eye, and FIG. 8 shows a light source for the left eye. In the figure, 12a and 12b are the observer image display devices shown in the above reference example. The observer image display device 12a is illuminated by the infrared lamp 81 so that the camera 82
The observer imaged at a and 82b is displayed.

First, the right eye of FIG. 7 will be described. Before the stereoscopic image is displayed on the stereoscopic image display device, the camera 82 is used.
Around a half of the face of the observer is translated in the left direction toward a. With this arrangement, the observer image display device 12a can be used when the observer is positioned in front as shown in FIG.
The image on the display screen is translated from the image represented by the broken line to the image represented by the solid line in the direction of arrow X by about half of the face of the observer. The position of the solid line image corresponds to the right half image of the observer's face, and thus corresponds to the right facial image of the above reference example.

On the other hand, to explain the case for the left eye of FIG. 8, the camera 82 is provided prior to the stereoscopic image display on the stereoscopic image display device.
Parallel to the rightward direction b, about half of the observer's face. By doing so, for example, as shown in FIG. 8, when the observer is positioned in front, the observer image display device 12b
The image on the display screen is translated from the image represented by the broken line to the image represented by the solid line in the direction of arrow Y by about half of the face of the observer. The image of this solid line corresponds to the image of the left face of the observer's face, and thus corresponds to the image of the left face of the above reference example.

The mechanism for moving the cameras 82a and 82b in parallel is easy for those skilled in the art, and will not be described in detail here. still,
It is sufficient that the distance of the parallel movement is constant, but it is preferable to change the distance corresponding to the face of the observer. Further, the movement of the cameras 82a and 82b is performed by the observer image display device 1
2a and 12b are for moving the observer's face image in parallel with about half of the face.
2b may be moved by swinging.

Thus, even if only one infrared lamp is used,
The operation of the stereoscopic image display device can be performed without requiring an extra recognition device.

(Embodiment 2) In the above-mentioned Embodiment 1, the case where only one infrared lamp is used has been described, but as shown in FIG.
If the display control device 100 that moves the display position to the left and right is added, stereoscopic image display can be performed by preparing only one camera 81. In this case as well, the display control device 100 can move the display image to the left and right simply by changing the raster signal, so that it is not necessary to add a complicated device, and the camera moving mechanism as in the first embodiment is used. do not need.

In the case of the present embodiment, the display control device 100
Alternately move the observer image left and right to the light source positions for the right and left eyes, and change the image displayed on the transmissive liquid crystal display as a spatial modulation element for the right and left eyes in synchronization with this movement. For example, time-divisional stereoscopic image display by one observer image display device and one spatial modulation element becomes possible. (Embodiment 3) FIG. 10 shows the configuration of a stereoscopic image display apparatus according to Embodiment 3. In FIG. 10, 10
Is a transmissive liquid crystal display as a spatial modulator, 11
Is a Fresnel lens having a focal length of 150 mm as a lens located on the back surface of the spatial light modulator 10. Reference numeral 12 denotes a monochrome CRT as an observer image display device having a light emitting function,
The lens 11 is located on the opposite side of the spatial modulation element 10 with the lens 11 in between, and is installed at a position farther than the focal length of the lens 11 and 160 mm away from the lens 11. Reference numeral 113 is an image processing device, 14 is a CCD camera as an image capturing device, and 115 is a stereo image for the right and left eyes from a stereo image output device and a figure similar to the right and left faces from the image processing device 13 is synchronized. Synchronous circuits 16 and 17 respectively represent observers who observe stereoscopic images.

The operation of the stereoscopic image display device configured as described above will be described with reference to FIG. In the stereo images observed by the viewers 16 and 17 in FIG. 10, the right-eye image and the left-eye image are signals from a stereo image output device such as a video tape recorder, a laser disc player, or a pair of television cameras. Are generated by being alternately displayed on the liquid crystal display 10 in a time division manner. Here, the time division display is 10-2 per second.
It is preferable to display images of 5 frames alternately. 1 division
If it is less than 0 frames, the image flickers too much and is not suitable for observation. If it is more than 25 frames, the liquid crystal display 10
However, there is a possibility that crosstalk may occur between the left and right images such that the image for the right (left) can be recognized by the left (right) eye because the response of is not in time.

The CCD camera 14 photographs the observer from the front, the obtained image signal is input to the image processing device 113, the contour of the face of the observer is extracted, and the center of gravity in the area surrounded by this contour is determined. To be detected. Further, the image processing device 113 divides the face contour into left and right with the center of gravity as the center of interest, creates a face half-face figure, and inverts the right-face figure and the left-face figure upside down to alternately display the black-and-white CRT 12 at high brightness. Split display.

Thus, the liquid crystal display 10 and the black and white C
Each of the RTs 12 alternately displays a right-eye image and a left-eye image in a time division manner, and these are synchronized by a synchronizing circuit 115. (Embodiment 4) FIG. 12 shows the structure of a stereoscopic image display device according to Embodiment 4, 10a and 10b being transmissive type influence displays as spatial modulators, and 11a and 11b.
Is a Fresnel lens having a focal length of 150 mm as a lens located on the back surface of each of the spatial modulation elements 10a and 10b. Reference numerals 12a and 12b denote black and white CRTs as observer image display devices having a light emitting function, which are located on the opposite sides of the spatial modulation elements 10a and 10b, respectively, with the lenses 11a and 11b interposed therebetween, and are installed at a distance of 160 mm from the lenses 11a and 11b. . 13 is an LED having a wavelength of 850 nm as a lighting device
Light, 14 is a monochrome CCD camera as a photographing device, 15
Is a half mirror for combining the images displayed on the spatial light modulators 10a and 10b into one, 16 is an observer who observes a stereoscopic image, 19 is an image processing device, and the CCD camera 14
Move the obtained facial image to the left by X and move to black and white CRT1
2a, and the face image moved to the left by X is inverted from negative to positive, and is sent to the monochrome CRT 12b. 44a is a face image of the observer 16 displayed on the monochrome CRT 12a, which is a light emitting portion of the monochrome CRT 12a, and 44b is an observer 16 displayed on the monochrome CRT 12b.
Negative / positive inverted face image of a black and white CRT 12b
Is the part that does not emit light.

The characteristic part of the operation of the stereoscopic image display device configured as described above will be described. The video signal of the face image of the observer 16 captured by the camera 14 is input to the image processing device 19 and is black and white. The image 44a moved to the left is displayed on the CRT 12a, and the black and white CRT 12b is moved to the left and the part other than the negative / positive inverted 44b is a figure corresponding to the light emitting part, that is, moved to the left. An inverted image is displayed in which only the facial image does not emit light.
In this case, one light and one camera are enough.

[0036]

As described above, according to the present invention,
It does not require glasses that have a function to sort left and right, and a large number of people can stereoscopically view at the same time without depending on the position of the observer,
Moreover, while providing a flicker-free screen and simplifying the photographing device such as an infrared lamp and a camera, a stereoscopic image display device having a simple structure that does not require a device for recognizing an observer image is provided, and the device is downsized. Therefore, it greatly contributes to the practical application and expansion of applications of the stereoscopic image display device and the stereoscopic endoscope device.

[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 diagram illustrating a configuration example for the right eye of the image capturing apparatus and the observer image display apparatus according to the first embodiment.

FIG. 8 is a diagram illustrating a configuration example for the left eye of the image capturing apparatus and the observer image display apparatus according to the first embodiment.

FIG. 9 is a diagram illustrating a configuration example for the right eye of the image capturing apparatus and the observer image display apparatus according to the second embodiment.

FIG. 10 is a configuration diagram of a stereoscopic image display device according to a third embodiment.

FIG. 11 is a configuration diagram of a stereoscopic image display device according to a fourth embodiment.

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

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

[Explanation of symbols]

 10a, 10b Transmissive liquid crystal display 11a, 11b Lens 12a, 12b Monochrome CRT 13a, 13b LED 14, 14a, 14b Monochrome CCD mirror 15 Half mirror 16, 17 Observer 18 Difference processing device 19 Image processing device 30 Imaging lens 31a, 31b Interference filter 32 Image sensor 33 Drive circuit 81 Infrared lamp 82, 82a, 82b Camera 100 Display control device

Claims (3)

[Claims] 1. A spatial modulation element having a light-transmitting property for displaying a stereo image, an observer image display device for illuminating the spatial modulation element from the back surface, and a display portion of the observer image display device. A directional optical element for enlarging, and a photographing device for photographing the observer, the observer image display device, the observer image photographed by the photographing device of the observer's face A light source corresponding to the right face of the observer is displayed by moving to the left about half, and a light source corresponding to the left face of the observer is displayed by moving to the right about half of the face of the observer. The stereoscopic image display device is characterized in that the spatial modulation element is illuminated from the back side. 2. A light modulating spatial modulator for displaying a stereo image, an observer image display device for illuminating the spatial modulator from the back surface, and a display portion of the observer image display device. An optical element having directivity for enlarging and a photographing device for photographing an observer, and the photographing device is an observer displayed on the observer image display device when photographing the observer image. A feature is that the face image of the observer is used as a light source for illuminating the spatial modulation element from the back side by determining the shooting direction so that the position of the image is displayed by moving about half of the observer's face. 3D image display device. 3. A light-transmitting spatial modulation element for displaying a stereo image, an observer image display device for illuminating the spatial modulation element from the back surface, and a display portion of the observer image display device. An optical element having directivity for enlarging and an image capturing device for capturing an image of an observer, the image capturing device detects the center of gravity from the captured face image of the observer, and the face image of the observer. Is used as a light source for illuminating the spatial modulation element by displaying on the observer image display device so that the side end is aligned with the position of the center of gravity.