JP3950102B2 - 3D display device - Google Patents

Description

  The present invention relates to a three-dimensional display device including a plurality of display devices arranged at different depth positions as viewed from an observer, and more particularly to a technique for preventing the occurrence of moire (interference fringes).

A three-dimensional display device that displays a three-dimensional stereoscopic image to an observer by arranging a plurality of transmission type display devices (for example, liquid crystal display devices) at different depth positions as viewed from the observer is known ( (See Patent Document 1 and Patent Document 2 below).
In the transmissive display device used for these three-dimensional display devices, as shown in FIG. 12, the plurality of pixels 10 are arranged so that the positions of the centers of gravity of the plurality of pixels 10 are periodic.
For this reason, the three-dimensional display device described in each of the above-mentioned patent documents has a problem in that moire (interference fringes) is generated due to interference between pixel patterns of each transmissive display device.
In order to prevent the occurrence of moire, Patent Document 2 described above describes disposing a diffusion plate between a plurality of transmissive display devices.

As prior art documents related to the invention of the present application, there are the following.
JP 2001-54144 A Japanese Patent No. 3335998 Specification

However, the method of preventing the occurrence of moire using the diffusion plate described in Patent Document 2 described above has a problem that the brightness of the front face becomes dark because light diffuses.
The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a three-dimensional display device including a plurality of display devices arranged at different depth positions as viewed from the observer. Therefore, it is an object of the present invention to provide a technique capable of preventing the occurrence of moire without lowering the front luminance.
The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
That is, the present invention includes a plurality of display devices arranged at different depth positions as viewed from the observer, and a display device other than the display device farthest from the observer is a transmissive display device. A device comprising means for vibrating two or more display devices of the plurality of display devices, wherein the vibrations of the two or more display devices are asynchronous.
The present invention also includes a plurality of display devices arranged at different depth positions as viewed from the observer, and the display devices other than the display device farthest from the observer are three-dimensional displays that are transmissive display devices A device comprising means for vibrating two or more display devices of the plurality of display devices, wherein the vibration directions of the two or more display devices include ones having a reverse vibration direction. .
In the present invention, the means is a motor or a vibrator such as a piezoelectric element, or a piezoelectric element or an actuator such as a solenoid.
In the present invention, the vibration direction by the means is a direction orthogonal to the overlapping direction of the display devices, and the amplitude width of the vibration is an integral multiple of 1/2 of the period of the pixels of the display device. It is characterized by that.
In the present invention, the direction vibration by said means, said a overlapping direction of the display device, you characterized in that to realize a speaker function by the vibration.
Also, in the preferred embodiment of the present invention, the three-dimensional display apparatus is a three-dimensional display device has been being DFD (Depth Fused 3-D) method described in Patent Document 1 described above.

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to prevent generation | occurrence | production of a moire in a three-dimensional display apparatus provided with the some display apparatus arrange | positioned in a different depth position seeing from an observer.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In all the drawings for explaining the embodiments, parts having the same functions are given the same reference numerals, and repeated explanation thereof is omitted.
[Example 1]
FIG. 1 is a schematic diagram illustrating a schematic configuration of a three-dimensional display device according to a first embodiment of the present invention.
In this embodiment, as shown in FIG. 1, a transmissive display device (101, 102) (the transmissive display device 101 is closer to the viewer 100 than the transmissive display device 102) is arranged on the front surface of the viewer 100. .
In this embodiment, for example, a moving image of a vehicle or the like is displayed on the transmissive display device 101, and a background image is displayed on the transmissive display device 102, thereby presenting a deep image to the observer 100. Is possible.
Here, as the transmissive display devices (101, 102), liquid crystal display devices (for example, twisted nematic liquid crystal display, in-plane liquid crystal display, homogeneous liquid crystal display, ferroelectric liquid crystal display, guest-host liquid crystal display) , Polymer dispersion type liquid crystal display, holographic polymer dispersion type liquid crystal display, or a combination thereof) or EL display device.
In the present embodiment, when the transmissive display device (101, 102) is a liquid crystal display device or the like, as shown in FIG. When the transmissive display device 102 is a self-luminous display device such as an EL display device, the light source 110 is not necessary.

In the present embodiment, a vibrator 120 is attached to the transmissive display device 102, and the transmissive display device 102 is vibrated at a cycle of 60 Hz, for example.
In this case, the vibration direction of the transmissive display device 102 by the vibrator 120 is the overlapping direction (direction A shown in FIG. 1) of the transmissive display devices (101, 102) or the transmissive display devices (101). , 102) may be perpendicular to the overlapping direction.
When the vibration direction of the transmissive display device 102 by the vibrator 120 is a direction orthogonal to the overlapping direction of the transmissive display devices (101, 102), the amplitude width of the vibration by the vibrator 120 is the transmissive display device. If it is an integral multiple of ½ of the period of 102 pixels, moire (interference fringes) caused by interference of the pixel patterns of the transmissive display devices (101, 102) is completely eliminated.
However, even if the amplitude width of vibration by the vibrator 120 is not an integral multiple of 1/2 of the pixel period of the transmissive display device 102, the pixel pattern of the transmissive display device (101, 102) is also synchronized with the vibration. Therefore, the moiré contrast generated by the interference of the pixel patterns of the transmissive display devices (101, 102) can be reduced, and the occurrence of moiré can be substantially reduced.
Further, even if the vibration direction of the transmissive display device 102 by the vibrator 120 is the overlapping direction of the transmissive display devices (101, 102) (direction A shown in FIG. 1), the transmissive display device (101, 101). 102) also changes in synchronism with the vibration, so that the contrast of moire caused by the interference of the pixel patterns of the respective transmissive display devices (101, 102) can be reduced, and the occurrence of moire substantially occurs. Can be reduced.
In this case, a speaker function can be realized by vibration of the transmissive display device 102.

Here, as the vibrator 120, a vibrator motor or a piezoelectric element can be used.
In this embodiment, the vibrator 120 is attached to the transmissive display device 102, but may be attached to the transmissive display device 101 and the transmissive display device 102.
Furthermore, in this embodiment, the number of transmissive display devices is not limited to two, and two or more transmissive display devices can be used.
In this case, when two or more transmissive display devices are vibrated by the vibrator 120, if the vibration cycle of each transmissive display device is made asynchronous, the pixel pattern of each transmissive display device (101, 102). It is possible to further reduce the moire contrast caused by the interference.
Further, when two or more transmissive display devices are vibrated by the vibrator 120, if the vibration directions of the transmissive display devices include vibrations in opposite directions, the transmissive display devices (101, 102) are used. The contrast of moiré caused by the interference of the pixel pattern of) can be further reduced.

[Example 2]
FIG. 2 is a schematic diagram illustrating a schematic configuration of the three-dimensional display device according to the second embodiment of the present invention.
The three-dimensional display device of this embodiment is different from the three-dimensional display device of the above-described embodiment in that an actuator 130 is used instead of the vibrator 120.
Hereinafter, the present embodiment will be described focusing on differences from the above-described embodiments.
Also in this embodiment, as the transmissive display device (101, 102), a liquid crystal display device (for example, a twisted nematic liquid crystal display, an in-plane liquid crystal display, a homogeneous liquid crystal display, a ferroelectric liquid crystal display, a guest liquid crystal display) -A host type liquid crystal display, a polymer dispersion type liquid crystal display, a holographic polymer dispersion type liquid crystal display, or a combination thereof, or an EL display device is used.
However, in the present embodiment, when the transmissive display device (101, 102) is a liquid crystal display device or the like, as shown in FIG. However, when the transmissive display device 102 is a self-luminous display device such as an EL display device, the light source 110 is not necessary.

In the present embodiment, an actuator 130 is attached to the transmissive display apparatus 102, and the transmissive display apparatus 102 is vibrated at a period of 60 Hz, for example, by the actuator 130.
In this case, the vibration direction of the transmissive display device 102 by the actuator 130 is the overlapping direction of the transmissive display devices (101, 102) (direction A shown in FIG. 2) or the transmissive display devices (101, 102). 102) may be orthogonal to the overlapping direction.
When the vibration direction of the transmissive display device 102 by the actuator 130 is a direction orthogonal to the overlapping direction of the transmissive display devices (101, 102), the amplitude width of the vibration by the actuator 130 is that of the transmissive display device 102. Moire (interference fringes) caused by interference of the pixel patterns of the transmissive display devices (101, 102) is completely erased when the number is an integral multiple of 1/2 of the pixel period.
However, even if the amplitude width of the vibration by the actuator 130 is not an integral multiple of 1/2 of the pixel period of the transmissive display device 102, the pixel pattern of the transmissive display device (101, 102) is also synchronized with the vibration. Since the shift is made, the contrast of moire caused by the interference of the pixel patterns of the transmissive display devices (101, 102) can be reduced, and the occurrence of moire can be substantially reduced.
Further, even if the vibration direction of the transmissive display device 102 by the vibrator 120 is the overlapping direction of the transmissive display devices (101, 102) (direction A shown in FIG. 1), the transmissive display device (101, 101). 102) also changes in synchronism with the vibration, so that the contrast of moire caused by the interference of the pixel patterns of the respective transmissive display devices (101, 102) can be reduced, and the occurrence of moire substantially occurs. Can be reduced.
In this case, a speaker function can be realized by vibration of the transmissive display device 102.

Here, as the actuator 130, a piezoelectric element or a solenoid can be used. Moreover, the actuator 130 can be used.
In this embodiment, the actuator 130 is attached to the transmissive display device 102, but it may be attached to the transmissive display device 101 and the transmissive display device 102.
Furthermore, in this embodiment, the number of transmissive display devices is not limited to two, and two or more transmissive display devices can be used.
In this case, when two or more transmissive display devices are vibrated by the actuator 130, if the vibration cycle of each transmissive display device is made asynchronous, the pixel pattern of each transmissive display device (101, 102) is changed. The contrast of moire caused by interference can be further reduced.
In addition, when two or more transmissive display devices are vibrated by the actuator 130, if the vibration directions of the transmissive display devices include vibrations in the opposite directions, the transmissive display devices (101, 102). It is possible to further reduce the moire contrast caused by the interference of the pixel patterns.

[Example 3]
FIG. 3 is a schematic diagram illustrating a schematic configuration of the three-dimensional display device according to the third embodiment of the present invention.
Also in this embodiment, as shown in FIG. 3, a transmissive display device (101, 102) (the transmissive display device 101 is closer to the viewer 100 than the transmissive display device 102) is arranged on the front surface of the viewer 100. .
Also in this embodiment, as the transmissive display device (101, 102), a liquid crystal display device (for example, a twisted nematic liquid crystal display, an in-plane liquid crystal display, a homogeneous liquid crystal display, a ferroelectric liquid crystal display, a guest liquid crystal display) -A host type liquid crystal display, a polymer dispersion type liquid crystal display, a holographic polymer dispersion type liquid crystal display, or a combination thereof, or an EL display device is used.
However, in the present embodiment, when the transmissive display device (101, 102) is a liquid crystal display device or the like, as shown in FIG. However, when the transmissive display device 102 is a self-luminous display device such as an EL display device, the light source 110 is not necessary.

In this embodiment, the transmissive display devices (101, 102) are attached to a device that includes, for example, a prime mover and vibrates during operation.
That is, as shown in FIG. 3, each transmissive display device (101, 102) is attached to a housing 150 of the device that vibrates during operation.
For each transmissive display device (101, 102), the fixing strength of the transmissive display device with respect to a device that vibrates during operation is varied. Note that FIG. 3 illustrates a case where the transmissive display device 101 is firmly attached to the housing 150 and the transmissive display device 102 is loosely attached to the housing 150 with a spring or the like.
As a result, each transmissive display device vibrates during operation of the device including the prime mover, but as described above, the fixing strength of the transmissive display device with respect to the device including the prime mover is different. Therefore, the vibration period of each transmissive display device is different.
Therefore, like the above-described embodiments, the contrast of moire can be reduced, and the occurrence of moire can be substantially reduced.
In this embodiment, the number of transmissive display devices is not limited to two, and two or more transmissive display devices may be used.

[Example 4]
FIG. 4 is a schematic diagram illustrating a schematic configuration of a three-dimensional display device according to Embodiment 4 of the present invention.
In this embodiment, as shown in FIG. 4, a plurality of transmissive display devices such as transmissive display devices (101, 102) (the transmissive display device 101 is provided by the transmissive display device 102 on the front surface of the observer 100. The optical system 103 is constructed using various optical elements and the light source 110.
As the transmissive display devices (101, 102), liquid crystal display devices (for example, twisted nematic liquid crystal display, in-plane liquid crystal display, homogeneous liquid crystal display, ferroelectric liquid crystal display, guest-host liquid crystal display, polymer) A dispersion type liquid crystal display, a holographic polymer dispersion type liquid crystal display, or a combination thereof, or an EL display device is used.
Further, as the optical element, for example, a lens, a total reflection mirror, a partial reflection mirror, a curved mirror, a prism, a polarization element, a wave plate, or the like is used.
The three-dimensional display device shown in FIG. 4 uses a liquid crystal display device as the transmissive display device (101, 102), and therefore, the case where the light source 110 is arranged at the rearmost position when viewed from the observer 100 is shown. Show.

The three-dimensional display device of the present embodiment is a DFD (Depth Fused 3-D) type three-dimensional display device described in Patent Document 1 described above.
Hereinafter, the principle of the DFD type three-dimensional display device will be described with reference to FIGS.
First, as shown in FIG. 5, an image (hereinafter referred to as a “2D image”) obtained by projecting a three-dimensional object 104 desired to be presented to the viewer 100 onto the transmissive display device (101, 102) as viewed from the viewer 100. 2D image (105, 106) is generated.
As a method for generating the 2D image, for example, a method using a two-dimensional image obtained by photographing the three-dimensional object 104 with a camera from the viewing direction of the observer 100 or a combination of a plurality of two-dimensional images taken from different directions. There are various methods such as a method, a computer graphic synthesis technique, and a method using modeling.
As shown in FIG. 4, the 2D image (105, 106) is seen from one point on the line connecting the right eye and the left eye of the observer 100 on both the transmissive display device 101 and the transmissive display device 102. Are displayed as 2D images (107, 108).
This can be achieved, for example, by controlling the arrangement of the center position and the center of gravity position of each 2D image (105, 106) and the enlargement / reduction ratio of each image.
On the apparatus having the above-described configuration, an image viewed by the observer 100 is generated by light that has passed through the 2D image 108 and has further passed through the 2D image 107.

An important point in the present embodiment is that the 2D image 107 and the 2D image 108 are maintained while the luminance of the image viewed by the observer 100 is kept constant to be the same as the luminance of the three-dimensional object 104 to be displayed. The depth position of the image felt by the observer 100 is changed by changing the distribution of the transmittance.
An example of how to change is described below.
Here, since it is a black and white drawing, the lower transmittance is shown darker in the drawing for easy understanding.
For example, when the three-dimensional object 104 is on the transmissive display device 101, as shown in FIG. 6, the transmittance on the transmissive display device 101 is set so that the luminance of the 2D image 107 is the luminance of the three-dimensional object 104. And the transparency of the portion of the 2D image 108 on the transmissive display device 102 is set to the maximum value of the transmissive display device 102, for example.
Next, for example, when the three-dimensional object 104 is slightly away from the observer 100 and is slightly closer to the transmissive display device 102 than the transmissive display device 101, as shown in FIG. The transmittance of the portion of the 2D image 107 on the display device 101 is slightly increased, and the transmittance of the portion of the 2D image 108 on the transmission display device 102 is slightly decreased.

For example, when the three-dimensional object 104 is further away from the observer 100 and is closer to the transmissive display device 102 than the transmissive display device 101, as shown in FIG. The transmittance of the portion of the 2D image 107 on the device 101 is further increased, and the transmittance of the portion of the 2D image 108 on the transmissive display device 102 is further decreased.
Further, for example, when the three-dimensional object 104 is on the transmissive display device 102, as shown in FIG. And the transparency of the portion of the 2D image 107 on the transmissive display device 101 is set to the maximum value of the transmissive display device 101, for example.
By displaying in this way, even if it is a 2D image (107, 108) that is displayed due to a human physiological or psychological factor or illusion, it is as if the viewer 100 is a transmissive display device ( 101, 102), it is felt that the three-dimensional object 104 is located in the middle.
That is, for example, when the transparency of the 2D image (107, 108) of the transmissive display device (101, 102) is set to be substantially the same, the depth position of the transmissive display device (101, 102) is set. It feels like the three-dimensional object 104 is near the middle.
In FIG. 4, the light source 110 is arranged at the rearmost position when viewed from the observer 100, but the light source 110 is not necessary when the transmissive display device 102 is a self-luminous display device such as an EL display device.
In the DFD (Depth Fused 3-D) type three-dimensional display device as described above, at least one of the transmissive display device 101 and the transmissive display device 102 is vibrated by the method described in each of the embodiments described above. The moire generated by the interference of the pixel patterns of the transmissive display devices (101, 102) can be eliminated or the contrast can be reduced, and the occurrence of moire can be substantially reduced.

FIG. 10 is a schematic diagram showing a schematic configuration of an example of the transmissive display device (101, 102) shown in FIG.
As shown in FIG. 10, the transmissive display device 101 includes a liquid crystal display panel 201 that functions as a polarization variable device and polarizing plates (203, 2031), and the transmissive display device 102 functions as a polarization variable device. Liquid crystal display panel 202 and polarizing plates (213, 2131).
A color filter (not shown) is also provided inside the liquid crystal display panel (201, 202). A light source (backlight) 110 is disposed behind the polarizing plate 213 (on the side opposite to the transmissive display device 101 of the polarizing plate 213).
Since the liquid crystal display panel (201, 202) can change the direction of polarization for each pixel, the intensity of the emitted light can be changed depending on the polarization direction of the emitted light and the polarization direction of the polarizing plate on the exit side. As described above, the light transmittance can be changed.
Therefore, the transmittance can be changed independently for each of the liquid crystal display panel 201 and the liquid crystal display panel 202 by controlling the polarization direction of the light passing through each pixel unit of the liquid crystal display panel (201, 202). .
Here, the 2D image (107, 108) displayed on the transmissive display device (101, 102) is a two-dimensional image of a color image.
Note that the transmissive display device shown in FIG. 10 can also be applied to the transmissive display devices of Examples 1 to 3 described above.

[Modification of Example 4]
FIG. 11 is a schematic diagram illustrating a schematic configuration of a modified example of the three-dimensional display device according to the fourth embodiment of the present invention.
In the three-dimensional display device illustrated in FIG. 11, the transmissive display device 101 includes a liquid crystal display panel 201 that functions as a polarization variable device and a polarizing plate 203, and the transmissive display device 102 functions as a polarization variable device. A display panel 202 and a polarizing plate 2131 are provided.
That is, in the three-dimensional display device illustrated in FIG. 11, the liquid crystal display panel 201 and the liquid crystal display panel 202 are disposed between the polarizing plate 203 and the polarizing plate 2131.
A light source (backlight) 110 is disposed behind the polarizing plate 2131 (on the side opposite to the transmissive display device 101 of the polarizing plate 2131).
A liquid crystal display panel (201, 202) is a device in which a polarizing plate is removed from a twisted nematic liquid crystal display, an in-plane liquid crystal display device, a homogeneous liquid crystal display device, a ferroelectric liquid crystal display device, an antiferroelectric liquid crystal display device, or the like. It is.
In addition, a color filter (not shown) is also provided in the liquid crystal display panel (201, 202).
Also in the three-dimensional display device shown in FIG. 11, the luminance of the image viewed from the observer 100 in the 2D image (107, 108) displayed on each transmissive display device (101, 102) is shown in FIGS. As described above, a three-dimensional stereoscopic image is displayed on the transmissive display device (101, 102) or at an arbitrary position between the transmissive display device 101 and the transmissive display device 102. It is possible.

However, in the three-dimensional display device shown in FIG. 11, the polarization direction of each liquid crystal display panel (201, 202) is considered in consideration that the polarization direction changes while passing through the liquid crystal display panel 201 and the liquid crystal display panel 202. It is necessary to control the direction.
As shown in FIG. 10 described above, as the transmissive display device 101, the liquid crystal display panel 201 provided with polarizing plates (203, 2031) on both sides, and the transmissive display device 102 as polarizing plates (213, 2131) on both sides. ), The four polarizing plates (203, 2031, 213, 2131) are inserted in the optical path of the irradiation light from the light source 110. There is a disadvantage that the transmittance of the display becomes low and the display becomes dark.
On the other hand, in the three-dimensional display device shown in FIG. 11, the liquid crystal display panel (201, 202) is sandwiched between two polarizing plates (203, 2131), thereby preventing the display from becoming dark. be able to.
Further, the three-dimensional display device shown in FIG. 11 has an advantage that the luminance in the liquid crystal display panel (201, 202) can be controlled with a substantially large degree of freedom.
That is, in the case of the transmissive display device (101, 102) shown in FIG. 10, the irradiation light from the light source 110 does not change or decreases while passing through each transmissive display device (101, 102). In addition, the luminance in each of the transmissive display devices (101, 102) does not change or decreases.

On the other hand, in the three-dimensional display device shown in FIG. 11, the amount of light does not substantially change up to the polarizing plate 203 on the emission side, and only the polarization direction changes in each liquid crystal display panel (201, 202). is doing.
In addition, the polarization direction is substantially added and rotated in each liquid crystal display panel (201, 202), but when viewed from outside the output side polarizing plate 203, the transmission polarization direction of the output side polarizing plate 203 is changed. As a reference, the brightness of each liquid crystal display panel (201, 202) decreases from 0 to 90 degrees, the brightness increases from 90 to 180 degrees, the brightness decreases from 180 to 270 degrees, and from 270 to 360 degrees. Can increase and decrease in brightness as the brightness increases.
Therefore, the luminance of each liquid crystal display panel (201, 202) can be increased, not changed, or decreased as compared with the luminance of the polarization variable device immediately before that.
However, in practice, for example, in a twisted nematic liquid crystal display device or the like, the maximum angle change is often 90 degrees, so it is necessary to design in consideration of this.
In the above description, only the two transmissive display devices are mainly described among the transmissive display devices that display the 2D image, and the three-dimensional object presented to the observer 100 is the two transmissive display devices. However, even if the number of transmissive display devices that display 2D images is larger than this, or the positions of three-dimensional objects to be presented are different, the same configuration is possible. It is clear that there is.
Further, the display surface of the two-dimensional image in the present embodiment is not necessarily a flat surface in view of the gist of the present invention, and the same may be applied to a spherical surface, an elliptical surface, a quadric surface, and other complicated curved surfaces. It is clear that an effect can be obtained.

In the above description, for example, the case where the depth position of the entire three-dimensional object is expressed using a 2D image displayed on each transmissive display device (101, 102) has been mainly described. The three-dimensional display apparatus can be used as a method and apparatus for expressing the depth of a three-dimensional object itself as described in Patent Document 1 described above.
Similarly, the three-dimensional display device of the present embodiment can be used when the three-dimensional object itself moves as described in the aforementioned patent document.
When the 2D image moves three-dimensionally, the moving image in each transmissive display device (101, 102) is the same as in the case of a normal two-dimensional display device regarding the movement of the 2D image in the horizontal and vertical directions. Regarding the movement in the depth direction, as described in the above-mentioned Patent Document 1, the transmissivity of the 2D image (107, 108) displayed on each transmissive display device (101, 102) is possible. It is possible to express a moving image of a three-dimensional image by temporally changing (that is, luminance viewed from the viewer 100).
As mentioned above, the invention made by the present inventor has been specifically described based on the above embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Of course.

It is a schematic diagram which shows schematic structure of the three-dimensional display apparatus of Example 1 of this invention. It is a schematic diagram which shows schematic structure of the three-dimensional display apparatus of Example 2 of this invention. It is a schematic diagram which shows schematic structure of the three-dimensional display apparatus of Example 3 of this invention. It is a schematic diagram which shows schematic structure of the three-dimensional display apparatus of Example 4 of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus of Example 4 of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus of Example 4 of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus of Example 4 of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus of Example 4 of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus of Example 4 of this invention. It is a schematic diagram which shows schematic structure of the transmissive display apparatus shown in FIG. It is a schematic diagram which shows schematic structure of the modification of the three-dimensional display apparatus of Example 4 of this invention. It is a figure which shows the arrangement | positioning state of each pixel of the conventional flat display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 pixel 100 observer 101,102 transmissive display apparatus 103 optical system 104 three-dimensional object 105,106,107,108 2D image 110 light source 120 vibrator 130 actuator 150 casing 201 of apparatus which vibrates during operation 201, 202 liquid crystal Display panel 203, 213, 2031, 2131 Polarizing plate

Claims (8)

A plurality of display devices arranged at different depth positions as viewed from the observer,
The display device other than the display device farthest from the observer is a three-dimensional display device that is a transmissive display device,
Means for vibrating two or more display devices of the plurality of display devices;
The three-dimensional display device characterized in that vibrations of the two or more display devices are asynchronous. A plurality of display devices arranged at different depth positions as viewed from the observer,
The display device other than the display device farthest from the observer is a three-dimensional display device that is a transmissive display device,
Means for vibrating two or more display devices of the plurality of display devices;
The three-dimensional display device characterized in that the vibration directions of the two or more display devices include those having opposite vibration directions.   The three-dimensional display device according to claim 1, wherein the means is a vibrator or an actuator.   The three-dimensional display device according to claim 3, wherein the vibrator is a motor or a piezoelectric element. The accession Chue chromatography data is three-dimensional display device according to claim 3, characterized in that the piezoelectric element or a solenoid. The vibration direction by the means is a direction orthogonal to the overlapping direction of the display devices,
6. The three-dimensional display device according to claim 1, wherein an amplitude width of the vibration is an integral multiple of ½ of a pixel period of the display device. The vibration direction by the means is an overlapping direction of the display devices,
The three-dimensional display device according to claim 1, wherein a speaker function is realized by the vibration. The two-dimensional image displayed on each display device is a two-dimensional image obtained by projecting the display target object from the line-of-sight direction of the observer with respect to the respective display devices arranged at different depth positions as seen from the observer. The brightness viewed from the observer in the two-dimensional image displayed on each display device is changed independently according to the depth position of the display target object. The three-dimensional display device according to any one of claims 1 to 7 .

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