JPH07159726A - Stereoscopic picture display device - Google Patents

Abstract

PURPOSE:To provide a stereoscopic picture display device which does not require spectacles having action for distributing pictures to right and left eyes in order to display the stereoscopic picture, where flickering does not occur because time-division display is not performed and only one photographing device is used, and by which a burden imposed on the observer is lightened. CONSTITUTION:The faces of observers 16 and 17 irradiated are photographed by using one photographing device 14 and one illuminating device 13. The positions of the photographed face pictures of the observers 16 and 17 are detected by a light spot coordinate detector 82 and transmitted to a picture output device 81. According to signals transmitted from the device 81, a backlight having a right and left selecting function for the observers 16 and 17 and graphics are displayed in order to illuminate spatial modulation elements 10a and 10b on the face of the observer detected by the detector 82 on an illuminating graphic display device.

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. 10 shows an example of the configuration of the conventional stereoscopic image display device. Reference numeral 60 denotes spectacles having a left / right distribution function, 61a and 61b liquid crystal shutters, and 62.
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. 11 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 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 above-mentioned conventional first and second stereoscopic image display devices are used, left and right spectacles, flickering of images, annoyance due to the limitation of movement of the observer, and the like hinder practical application. Is the current situation.

The present invention provides a stereoscopic image display device which 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. The purpose is to

[0009]

The problem to be solved by the present invention is to provide a pair of light-transmitting spatial modulators for displaying a stereo image, and a pair for illuminating the spatial modulators from the back side, respectively. Illumination graphic display device, a pair of lenses positioned between the spatial modulation element and the illumination graphic display device and having directivity for enlarging the display portion of the illumination graphic display device, and the pair of lenses. A half mirror for combining images displayed on the spatial light modulator into one, a position detecting means for detecting an observation position, and a control means for controlling a lighting position of the illumination graphic display device according to the detected position. And a position corresponding to the observer's right face and left face in the pair of illumination graphic display devices by controlling the lighting position of the illumination graphic display device by this control means. The is achieved by the three-dimensional image display apparatus characterized by displaying a graphic for illuminating the spatial modulation element.

Another object is to provide a spatial light modulator having a light-transmitting property for time-divisionally displaying a stereo image, an illumination graphic display device for illuminating the spatial light modulator from the back surface, and the spatial modulation. A lens having a directivity for enlarging the display portion of the illumination graphic display device, which is located between the element and the illumination graphic display device, a position detector for detecting the position of the face of the observer, and the position Based on the position of the observer detected by the detector, for the left eye, comprising a control means for driving the illumination graphic display device so as to display the illumination graphic for the right eye in time division, the drive by the control means The present invention is achieved by a stereoscopic image display device characterized by synchronizing with time-divisional display of the spatial light modulator.

Here, the position detecting means includes a display for displaying an observer image photographed by the photographing device,
It is preferable to detect the position coordinates by using the face image of the observer displayed on the display as a light spot. Further, the stereoscopic image display device may include an infrared illumination device for illuminating the right face or the left face of an observer, and the imaging device may be capable of selectively capturing an infrared wavelength of the illumination device. preferable.

Further, the stereoscopic image display device is provided with a pair of illuminating devices for illuminating the right face and the left face of an observer with two different wavelengths, and the photographing device has an infrared wavelength of the pair of illuminating devices. It is preferable to use a pair of image pickup devices provided with wavelength filters that can selectively pass through each. In the stereoscopic image display device, it is preferable that the image output surface of the illumination graphic 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.

In the stereoscopic image display device,
A pair of lens barrels for photographing a subject image to be stereoscopically viewed from two directions, and an endoscope including a pair of image pickup devices for converting the obtained pair of subject images into electric signals, respectively. The image obtained by the image pickup device can be displayed on the stereoscopic image display device. Also,
In the three-dimensional image display device, the detection device for detecting the position of the observer detects the position of the observer using ultrasonic waves having one or two or more different frequencies, and detects the position of the observer. The graphic display device may display a graphic to illuminate the spatial modulator at positions corresponding to the left and right faces of the observer.

[0015]

According to the present invention, with the above structure, the face position information of the face is detected by photographing the face image of the observer illuminated by the one photographing device and the one illuminating device, and from this position information. It is possible to provide a stereoscopic image display device capable of creating a backlight that illuminates the spatial modulation element.

Still further, by using the time division technique, images for the left eye and the right eye are alternately displayed on the spatial modulation element, and the left and right of the backlight are selected in synchronism with the display on the left and right. It is possible to provide a stereoscopic image display device in which the number of element lenses and the illumination graphic display device can be one. In this stereoscopic image display device, the figure displayed on the illumination graphic display device (right) is incident only on the periphery of the observer's right eye through the lens having directivity, so that the observer's right eye sees the figure as a virtual image. As a result, 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 side of the graphic displayed on the illumination graphic display device (right) by the lens having the directivity is incident on the left eye of the observer, but this part emits light. Since it does not exist, 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 modulation element illuminates only the figure displayed on the illumination graphic display device (left) from the back side by the lens having directivity as illumination. The left eye of the observer observes only the image for the left eye, which cannot be observed by the right eye.

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. As a method of synthesizing the image for the right eye and the image for the left eye obtained in this way,
Various methods are conceivable, but a method in which two lighting graphic display devices, two lenses, and two spatial modulation elements are provided, and each is independently used for the right eye and the left eye, and is combined using a half mirror, or A method of alternately displaying in time division while synchronizing the display of the illumination graphic display device and the display of the spatial modulation element is preferable. The former is more preferable in that there is no flicker in the image, and the number of parts is small,
The latter is more preferable in that the device can be downsized.
Further, when the observer moves, the graphic displayed on the lighting graphic display device also follows, so that the stereoscopic condition described above is maintained. For the same reason, even when there are a large number of observers, each observer can perform stereoscopic viewing.

The present invention further comprises an illuminating device for illuminating the face of the observer, the illumination of the illuminating device is infrared illumination that is not recognized by the observer, and the photographing device selects the infrared wavelength of the illuminating device. The effect of ambient light can be eliminated by making it possible to obtain an image of the face of the observer easily without giving discomfort to the observer.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. Prior to the description, some examples included in the prior application of the same applicant will be cited and described as reference examples. Reference Example 1 FIG. 1 included in the prior application of the same applicant will be described as a reference example with reference to FIG.

In the reference example of FIG. 1, 10a and 10b are transmissive liquid crystal displays as spatial modulation elements, 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 illumination graphic 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 how 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, an illumination graphic display device (black and white CRT) and lens are shown. Are shown one by one, and a half mirror, a liquid crystal display, and another lens and an illumination graphic display device are omitted. 11a is a lens, 1
2a is a black and white CRT, 16 and 17 are two observers who observe stereoscopic images, and 40, 41, 42 and 43 are black and white CRs.
The region actually observed by the observer in the observer image displayed on the screen of T12a is shown.

The operation of the above stereoscopic image display device will be described with reference to FIGS. The stereoscopic images observed by the viewers 16 and 17 in FIG. 1 are displayed continuously on the liquid crystal display 10b with the right-eye image on the liquid crystal display 10a and the left-eye image on the liquid crystal display 10b in a mirror image with left and right reversed. , The two stereo images are half mirror 1
5 are combined into one screen. More specifically, in FIG. 1, for example, the image on the right side of the CRT 12a (actually the right face) and the right face of the observer 17 correspond,
The liquid crystal display 10a is driven by an image for the right eye to see. Similarly, an 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 an 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.

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 the right eye to see. Similarly, an image of the left face of the observer 16 is displayed on the CRT 12b as a backlight, and the liquid crystal display 10
Since b is driven by the image for viewing with the left eye and the two images are combined by the half mirror, the observers 16 and 17 can observe a stereoscopic image. Further, 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 is the area 20a on the right half face of the observers 16 and 17 and the LED 13b is the observer 1.
Position 6 and 17 to illuminate the left half area 20b of the face. The emission wavelengths of the LEDs 13a and 13b are 850 nm and 951 respectively, as shown in FIG.
Since it has distributions 25a and 25b centered at nm 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. For this reason,
If the regions 40 and 42 are light emitting surfaces, the observer 1
6 and 17, it is possible to act as illumination having selectivity to the right eye having 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 left eye does not receive light from the monochrome CRT 12a.
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 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.

Although a transmissive liquid crystal display is used as the spatial modulation element in the above-mentioned reference example, the spatial modulation element may be any one having optical transparency and capable of displaying 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.

(Embodiment 1) FIG. 6 shows the structure of a stereoscopic image display apparatus according to Embodiment 4 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 illumination graphic display devices having a light emitting function.
Spatial modulation element 1 sandwiching lenses 11a and 11b, respectively
Located on the opposite side of 0a and 10b, the lenses 11a and 11b
Install at a distance of 160 mm. 13 is an LED light having a wavelength of 850 nm as an illuminating device, 14 is a black and white CCD camera as an imaging device, and 15 is spatial modulation elements 10a and 10b.
Half mirrors for synthesizing the images displayed in 1), 16 and 17 are observers for observing stereoscopic images,
Reference numeral 81 represents an image output device. Reference numeral 82 denotes a light spot coordinate detector, which detects the position coordinates of the face image captured by the monochrome CCD camera 14 from the image displayed on the monochrome liquid crystal display 83 using the image as a light spot, and outputs the image output device 81. Send to. Figure 44 displayed on the black and white CRT 12a
Reference numerals a and 44b are backlights for the right eye of the observers 16 and 17, and are light emitting portions 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 1 of the present invention shown in FIG. 1, the same parts are designated by the same reference numerals. Will be omitted and only different points will be described. The images of the faces of the observers 16 and 17 captured by the camera 14 are displayed on the monochrome liquid crystal display 83 as described above. The position coordinates and the number of this face image are detected by the light spot coordinate detector 82 as a light spot, and the face image is input to the image output device 81 and the black and white CRT 1
On the screen 2a, figures 44a and 44b corresponding to the backlights of the right eyes of the observers 16 and 17 are displayed according to the position coordinates. The black and white CRT 12b has observers 16 and 17
A mirror image of the figure corresponding to the backlight of the left eye of is displayed. That is, a graphic to be used as a backlight for the right eye and a backlight for the left eye is created by the image output device 81, and the black and white CR is displayed.
These figures are displayed on the T12a and 12b as the light spot coordinate detector 82.
It is displayed in accordance with the position coordinates of the faces of the observers 16 and 17 detected in. In this case, one light and one camera are enough.

(Embodiment 2) FIG. 7 shows the structure of a stereoscopic image display apparatus according to Embodiment 2 of the present invention. 10 is a transmissive liquid crystal display as a spatial modulation element, and 11 is a spatial modulation element 10. It is a Fresnel lens having a focal length of 150 mm as a lens located on the back surface. Reference numeral 12 denotes a monochrome CRT as a lighting graphic display device having a light emitting function,
Located on the opposite side of the spatial modulator 10 with the lens 11 in between,
It is installed at a distance of 160 mm from the lens 11. Reference numeral 13 denotes an LED light having a wavelength of 850 nm as an illuminating device, 14 a black and white CCD camera as an image capturing device, 16 and 17 observers for observing stereoscopic images respectively, and 81 an image output device.
Reference numeral 82 denotes a light spot coordinate detector, which is the black and white CCD camera 1
The facial images of the observers 16 and 17 photographed by 4 are detected from the image displayed on the black-and-white liquid crystal display 83 using the image as a light spot, and the position coordinates thereof are detected and sent to the image output device 81. According to this position coordinate, the black and white CRT 12 has 44a,
44b, 45a, 45b are displayed, and the observers 16, 17 are made to act as a backlight corresponding to the right eye, and the graphics shown by 45a, 45b are displayed, 44a,
By issuing 44b, it is possible for the viewers 16 and 17 to act as a backlight corresponding to the left eye.

Since the operation of the stereoscopic image display device constructed 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 images of the facial images of the observers 16 and 17 captured by the camera 14 are displayed on the black and white liquid crystal display 83 as described above, and the position coordinates of the face are detected by the light point coordinate detector 82 from this image. Then, it is input to the image output device 81 and displayed on the monochrome CRT 12 as figures 44a and 44b corresponding to the backlights of the right eyes of the observers 16 and 17. Further, the parts corresponding to the backlights of the left eyes of the observers 16 and 17 are emitted, and the mirror images of the figures, that is, the positions of the right eyes and the left eyes are determined by the image output device 81, and displayed on the monochrome CRT 12 as the backlights 45a45b. However, black and white CRT12
The synchronization circuit 84 synchronizes the display (backlight) of the left-eye and right-eye figures with the stereo image displayed on the spatial modulator. In this case, one light and one camera are enough.

Further, as compared with the first embodiment, only one black-and-white CRT, Fresnel lens, and one spatial modulator are required, and a half mirror for synthesizing images is not required. That is, the entire face is illuminated from the front of the observer by the infrared LED 13 and L
An image is taken by the black and white CCD camera 14 equipped with a wavelength filter corresponding to the wavelength of the ED 13, and the output of the black and white CCD camera 14 is connected to the black and white liquid crystal display 83, where the face image of the observer is displayed as a light spot.

On the front surface of the panel of the monochrome liquid crystal display 83, a two-dimensional position sensor capable of detecting the coordinates of the light spot.
A (light spot coordinate detector 82) is attached, and the position coordinates of the observer's face screen imaged on the black and white liquid crystal display 83 are detected in real time and sent to the image output device 81. The image output device 81 outputs a specific figure for the backlight light source to the black and white CT 12 according to the number and coordinates of the face images detected by the two-dimensional position sensor (light spot coordinate detector 82).

The shape and size of the specific figure are optimized so that the observers 16 and 17 can act as a backlight having a left / right selection function. The monochrome liquid crystal display 83 may be a CRT or a plasma display,
Alternatively, the LEDs may be arranged in a matrix. (Embodiment 3) FIG. 8 shows the configuration of a stereoscopic image display apparatus according to the third embodiment of the present invention. The feature of this embodiment is that the position of the observer is detected using ultrasonic waves. Less than,
A third embodiment will be described with reference to FIG.

Reference numeral 10 is a transmissive liquid crystal display as a spatial modulation element, and 11 is a Fresnel lens having a focal length of 150 mm as a lens located on the back surface of the spatial modulation element 10. Reference numeral 12 denotes a black and white CRT as an illumination graphic display device having a light emitting function, which is located on the opposite side of the spatial modulation element 10 with the lens 11 in between, and a distance 16 from the lens 11.
Set to 0 mm. Reference numerals 27a and 27b denote ultrasonic wave irradiation devices, which irradiate the observers 16 and 17 with ultrasonic waves having frequencies of 100 KHz and 120 KHz, respectively. 28a, 2
Reference numeral 8b is an ultrasonic wave detection device for detecting the ultrasonic waves emitted by the ultrasonic wave irradiation device, and selectively detects only the frequencies emitted by the ultrasonic wave irradiation devices 27a and 27b, respectively. Reference numeral 29 denotes an ultrasonic image output device. 44a, 44
Reference numerals b, 45a, and 45b are figures displayed on the portions corresponding to the right and left faces of the observers 16 and 17 displayed on the black and white CRT 12, and are light emitting portions of the black and white CRT 12.

Reference numeral 84 is a synchronizing circuit, which is used for a monochrome CRT,
When the figures 44a and 44b for the right face are displayed, the spatial modulator 10 is driven by the video signal of the right face. That is, when the backlight of the monochrome CRT is the right face, the synchronizing circuit displays the right eye image on the spatial modulation element 10, and when the backlight is switched to the left face figure (45a, 45b), the space is displayed. To display the left-eye image on the modulator 10,
Switch over.

In this embodiment, the ultrasonic wave irradiation devices 27a, 2a and 2b are used.
The ultrasonic waves of two wavelengths emitted from 7b are reflected by two observers and are detected by the ultrasonic detecting devices 28a and 28b. The ultrasonic image output device 29 calculates the positions corresponding to the left and right screens of the observer on the black and white CRT 12 from the detected signals, so that predetermined right face graphics 44a, 44b and left face graphics 45a, 45b are obtained. ,
Output and display on the black and white CRT 12. In this case, it is easy to perform processing so that light is emitted only in the part corresponding to the observer's face, so the right (left) side may be affected by ambient light.
It is possible to eliminate the crosstalk between the left and right images in which the target image is slightly recognized by the left (right) eye.

(Embodiment 4) FIG. 9 shows an application configuration of the stereoscopic image display apparatus to an endoscope in the first embodiment of the present invention shown in FIG. 6, in which 50a and 50b photograph a subject. The objective lenses 51a and 51b for performing the operation are lens barrels having a built-in optical system for guiding the captured image, and are installed at an angle corresponding to the vergence angle of the eyes of the observer. 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.

[0041]

As described above, according to the configuration of the present invention, the stereoscopic image device of the present invention photographs the face screen of an observer illuminated by one of the photographing device and one illumination device. By detecting the position information of the left and right faces,
Since a backlight for illuminating the spatial modulation element can be created from this position information, only one camera is required and the brightness of the backlight does not vary.

Furthermore, by using the time division technique, the spatial modulation elements are alternately driven by the left and right images, and the left and right of the backlight are selected in accordance with the selection of the left and right images. The number of graphic display devices can also be one each. Therefore, it is not necessary to use glasses having a function of distributing left and right, and a large number of observers can simultaneously perform stereoscopic viewing under the same conditions even when the observers move, and the images provided are continuous. Since a device without flicker can be realized, 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 the first embodiment of the present invention.

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

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

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

FIG. 10 is a configuration diagram of a first example of a conventional stereoscopic image display device.

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

[Explanation of symbols]

 16, 17 Observer 10, 10a, 10b Transmissive liquid crystal display 11, 11a, 11b Lens 12, 12a, 12b Monochrome CRT 13 LED 14 Monochrome CCD camera 15 Half mirror 36 Objective lens 50a, 50b Lens barrel 53 Stereoscopic image display device 81 Image output device 82 Light spot coordinate detector 83 Black-and-white liquid crystal display 84 Synchronous circuit

Claims (2)

[Claims] 1. A pair of light-transmitting spatial modulators for displaying a stereo image, a pair of illumination graphic display devices for respectively illuminating the spatial modulators from the back side, and the spatial modulators. A pair of lenses having directivity for enlarging the display portion of the illumination graphic display device and positioned between the illumination graphic display devices and an image displayed on the pair of spatial modulation elements are combined into one. A half mirror for moving, a position detecting means for detecting the position of the observer,
Observing the pair of illumination graphic display devices by controlling the lighting position of the illumination graphic display device according to the detected position, and controlling the lighting position of the illumination graphic display device by this control means. A stereoscopic image display device, which displays 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 a person. 2. A spatial modulation element having a light-transmitting property for time-divisionally displaying a stereo image, an illumination graphic display device for illuminating the spatial modulation element from the back side, the spatial modulation element and the illumination. A lens having directivity for enlarging the display portion of the illumination graphic display device, which is located between the graphic display devices, a position detector for detecting the position of the face of the observer, and detected by the position detector. And a control means for driving the illumination graphic display device so as to time-divisionally display illumination graphics for the left eye and the right eye based on the position of the observer, and the drive by the control means is the spatial modulation element. A stereoscopic image display device characterized by being synchronized with the time-divisional display.