JP3539717B2 - Display shooting device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a display / photographing device, and is useful when applied to, for example, a remote interactive device.
[0002]
[Prior art]
FIG. 10 is a configuration diagram of a conventional display photographing apparatus. In the display / photographing apparatus shown in the figure, when performing image display and photographing of a subject at the same time, the image is projected and displayed on the screen 2 by the liquid crystal projector 1, while the person 4 as the subject is placed in a place other than the screen 2, for example, as shown in the figure. As described above, an image is taken by the video camera 3 from above the screen 2.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional display / photographing apparatus, when the person 4 watching the image displayed on the screen 2 is photographed by the video camera 3, it can be photographed only from a place other than the screen 2 (such as above the screen 2). The human 4 cannot be photographed directly in front. For this reason, when a remote interactive device is configured using the above-described conventional display / photographing device, it is not possible to realize a remote interactive device in which the eyes of the interlocutors match.
[0004]
Therefore, the present applicant has previously proposed a display / photographing device capable of solving the above problem (Japanese Patent Application No. 10-241221). Although not shown, this display photographing device is composed of a display device including a liquid crystal projector and a polarizing scattering plate which is a screen for projecting and displaying an image by the liquid crystal projector, and a subject (human being) provided near the liquid crystal projector and passing through the screen. ) And a polarizing plate installed on the front of the camera, thereby realizing a remote interactive device in which the eyes of the interlocutors coincide.
[0005]
However, since this display photographing apparatus uses a liquid crystal projector, a distance for arranging the liquid crystal projector in front of or behind the screen is required. Therefore, the thickness of the device cannot be reduced.
[0006]
Accordingly, the present invention has been made in view of the above-described problems and the like, and can realize a remote dialogue device in which a subject such as a human can be photographed directly in front of each other, and a line of sight of interlocutors coincides. It is an object of the present invention to provide a display / photographing device that can be made thinner without requiring any device.
[0007]
[Means for Solving the Problems]
The present invention is realized by dispersing a low-molecular liquid crystal in a high-molecular liquid crystal so that scattering and transmission can be controlled by an electric field for a specific polarization component and the other polarization components are always in a transmission state. A display device that displays an image by using a reverse mode polymer-dispersed liquid crystal and driving the liquid crystal with a plurality of electrodes has the following configuration.
[0008]
That is, the display / photographing device of the first invention that solves the above-mentioned problem,Scattering / transmission or diffraction / transmission can be controlled by an electric field for specific polarization components, while other polarization components are always in a transmission state.A display device that displays an image by driving the reverse mode polymer dispersed liquid crystal with a plurality of electrodes,
SaidAnd a photographing apparatus including a polarizing plate that transmits only a polarized component that is always transmitted by the reverse mode polymer-dispersed liquid crystal.
Further, the display / photographing device of the second invention can control the scattering / transmission or the diffraction / transmission of a specific polarization component by an electric field, and can always control the transmission of the other polarization components. A display device that displays an image by driving a reverse mode polymer dispersed liquid crystal realized by dispersing a birefringent low molecular liquid crystal in a birefringent medium with a plurality of electrodes,
And a photographing apparatus having a polarizing plate that transmits only the polarized component that is always transmitted by the reverse mode polymer dispersed liquid crystal.
[0009]
Also,3The display / photographing apparatus of the present invention has a firstOr 2In the display photographing device of the invention,SaidDisplay deviceSaidA light guide plate is provided in close contact with the reverse mode polymer-dispersed liquid crystal panel, and a light source is provided on the side of the light guide plate.SaidIt is characterized in that it is configured to guide to a reverse mode polymer dispersed liquid crystal.
[0010]
Also,4The display device of the present invention3In the display photographing device of the invention,
SaidDisplay deviceSaidReverse mode polymer dispersed liquid crystal panel on both sidesSaidA light guide plate is provided.
[0011]
Also,5The display / photographing device of the invention includes first and second, Third or fourthIn the display photographing device of the invention,
SaidA wave plate is provided on the surface of the display device on the subject side.
[0012]
Also,6The display / photographing device of the invention includes first, second, third, Fourth or fifthIn the display photographing device of the invention,
SaidA mirror is provided on one side of the display device,SaidThe subject on the other side of the display deviceSaidA photographing device is provided.
[0013]
Also,7The display / photographing device of the invention6In the display photographing device of the invention,
SaidA hologram mirror is provided as a mirror.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
[Embodiment 1]
FIG. 1 is a configuration diagram of a display and imaging device according to Embodiment 1 of the present invention, FIG. 2 is a configuration diagram of a remote interaction device using the display and imaging device, and FIG. 3 is a configuration of a display device provided in the display and imaging device. FIGS. 4A and 4B are diagrams illustrating the case where the reverse mode polymer-dispersed liquid crystal of the display device is driven by the TFT method, and FIGS. 5A and 5B are diagrams illustrating the operation of the reverse mode polymer-dispersed liquid crystal.
[0016]
<Structure>
As shown in FIG. 1, the display / photographing apparatus 10 includes a camera 12 such as a video camera, which is a photographing apparatus, provided on one side of a display apparatus 11 (detailed later) that emits a specific polarization component 15 as display light. The configuration is such that a person 13 looks at an image displayed on the display device 11 from the other side of the display device 11.
[0017]
A polarizing plate 14 is provided on the front surface of the camera 12. The polarizing plate 14 transmits only the polarization component 16 which is always transmitted by the reverse mode polymer dispersed liquid crystal 25 (see FIG. 3) of the display device 11. The polarization component 15 emitted from the display device 11 is parallel to the plane of FIG. 1, and the polarizing plate 14 provided in the camera 12 is provided in a direction to absorb the polarization component 15 emitted from the display device 11. Accordingly, the camera 12 captures only the polarized component 16 perpendicular to the plane of FIG. 1 out of the light emitted by the person 13 as the subject through the polarizing plate 15 to photograph the person 13.
[0018]
In the first embodiment, the polarization direction of the display device 11 is set parallel to the plane of FIG. 1. However, the present invention is not limited to this, and the absorption direction of the polarizing plate 14 may be the same as the polarization direction of the display light of the display device 11. In this case, the absolute polarization direction of the display device 11 is arbitrary. Although the polarizing plate 14 is provided immediately before the camera 12 in FIG. 1, the present invention is not limited to this, and the polarizing plate 14 may be provided on the surface of the display device 11 on the camera 12 side.
[0019]
The configuration of a remote interactive device using the display / photographing device 10 having the above configuration is as shown in FIG. 2, for example. In the remote interactive device shown in FIG. 2, the two display photographing devices 10A and 10B having the above configuration are arranged at two remote locations, respectively, and the camera 12A of the display photographing device 10A and the display device 11B of the display photographing device 10B are coded. 17 and the camera 12B of the display / photographing device 10B and the display device 11A of the display / photographing device 10A are electrically connected with the cord 17 so that the human 13A and the human 13B can display each other with the display devices 11A and 11B. The dialogue is made while looking at the image of the other party displayed in.
[0020]
Here, the display device 11 will be described in detail with reference to FIGS. As shown in FIG. 3, the display device 11 has a structure in which a reverse mode polymer dispersed liquid crystal 25 is sandwiched between a transparent substrate 23 having a transparent electrode 21 and a transparent substrate 24 having a transparent electrode 22. . Then, one of the transparent substrates 23 is used as a light guide plate, and a cold cathode tube 28 surrounded by a cover 32 is provided on a side portion of the light guide plate 23 as a light source for illuminating the reverse mode polymer dispersed liquid crystal 25. (Illumination light) 28 emitted from the light guide plate 23 is guided to the reverse mode polymer dispersed liquid crystal 25 by the light guide plate 23.
[0021]
As shown by the solid arrows in FIG. 3, the light beam 29 emitted from the cold cathode tube 28 propagates while being totally reflected inside the light guide plate 23. A light ray 29 happens to occur at a place (A in the illustrated example) of the reverse mode polymer-dispersed liquid crystal 25 where an electric field is applied by a power supply 30 electrically connected to the transparent electrodes 21 and 22 to cause a scattering state. If so, the light beam 29 is scattered, and an emission light (display light) 31 as shown by a dotted arrow in FIG. 3 is obtained.
[0022]
This display device 11 can be easily manufactured as follows. That is, as in the case of a normal liquid crystal panel, transparent electrodes 21 and 22 are formed on transparent substrates 23 and 24 such that they can be driven by a matrix such as a TFT method, and alignment films 26 and 27 are applied thereon. An alignment process such as rabbling is performed. Next, these substrates 23 and 24 are arranged so that the alignment films 26 and 27 face each other, and a photopolymerizable liquid crystal such as UCL-002 (Dainippon Ink and Chemicals) is provided between the alignment films 26 and 27. And a mixture of a non-polymerizable liquid crystal such as E-7 (Merck Japan), and irradiating the mixture with ultraviolet rays to produce a reverse mode polymer-dispersed liquid crystal 25. Then, a cold cathode tube 28 is attached as a light source to a side portion of the substrate 23 which is a light guide plate. Thus, the display device 11 can be manufactured.
[0023]
Note that the orientation direction may be antiparallel. The anti-parallel alignment is an alignment state realized by sandwiching between rubbing directions of anti-parallel (anti-parallel) substrates, and the tilt angle between liquid crystal molecules and the substrate surface is uniform regardless of location. It is known that a defect-free orientation is easily obtained.
[0024]
The transparent electrodes 21 and 22 are processed so that the reverse mode polymer dispersed liquid crystal 25 can be driven by a matrix such as a TFT method as described above. This will be specifically described based on No. 4. Note that FIG. 4 shows only the configuration on the pixel electrode side, and the illustration is omitted because the opposing electrodes are uniform.
[0025]
As shown in FIG. 4, the TFT method means a first substrate 45 provided with a switching element 42 formed of a thin film transistor (TFT) for each pixel electrode 41 and a second substrate provided with a uniform electrode over the entire surface (not shown). By sandwiching the polymer-dispersed liquid crystal with the substrate, selecting the pixel electrode 41 for each row by the address line 43, and storing the potential of the data line 44, the image information is written line-sequentially as the potential of the pixel electrode 41, In this method, display is performed by using a potential difference between the pixel electrode 41 on the first substrate 45 and a uniform electrode on the second substrate.
[0026]
In FIG. 3, the transparent electrode 22 corresponds to the pixel electrode 41, the substrate 24 corresponds to the first substrate 45, the transparent electrode 21 corresponds to the uniform electrode, and the light guide plate 23 corresponds to the second substrate. .
[0027]
In addition, since the reverse mode polymer dispersed liquid crystal 25 is in a scattering state with respect to one polarization component when an electric field is applied, only the region to which the electric field is applied by matrix driving is in a state where the polarization component is scattered and emits light. When the light source illuminating the reverse mode polymer-dispersed liquid crystal 25 is of a single color, monochrome display is performed in a scattering state (white) and a transparent state (black). Further, by switching the light source to three primary colors in synchronization with the display image, full-color display can be performed.
[0028]
The scattering characteristics of a film in which birefringent particles are dispersed in a birefringent medium such as the reverse mode polymer-dispersed liquid crystal 25 can be explained as follows. The operation of the reverse mode polymer dispersed liquid crystal 25 will be described below with reference to FIG. Further, for the sake of simplicity, the description will be made on the assumption that the dispersed particles are birefringent particles and the number thereof is one.
[0029]
When no electric field is applied, the reverse mode polymer-dispersed liquid crystal 25 is transparent without scattering because it is a uniform birefringent thin film having an optical axis aligned in one direction. On the other hand, when the electric field is applied, the birefringent particles 52 having different optical axis directions are present in the birefringent thin film uniformly oriented as shown in FIG.
[0030]
As shown in FIG. 5, when light generally enters a birefringent medium 51 that is a transparent object, an electric field induces a vibrating dipole 53, but in a uniform birefringent medium 51, the vibrating dipole 53 Since it is induced uniformly, scattering by the individual vibration dipoles 53 does not occur.
[0031]
Next, as shown in FIG. 5, when there is one birefringent particle 52, for example, when the ordinary refractive index of the birefringent medium 51 is equal to the ordinary refractive index of the birefringent particle 52, The index difference occurs between the birefringent medium 51 and the birefringent particles 52 in the direction in the plane of FIG. 5 and does not occur in the direction perpendicular to the plane of FIG.
[0032]
Here, considering the vibration dipole 53 induced similarly, only the portion of the birefringent particle 52 has a vibration dipole 53a (arrow in thin line) induced therein which is different in size from the periphery as shown in the drawing. . That is, when viewed relatively, this is equivalent to the presence of the vibrating dipole 54 (dashed thick arrow) corresponding to the refractive index difference at the position where the particle exists. The scattering cross section of the relatively induced vibration dipole 54 exists only for the polarized light in the in-plane direction of FIG. 5, and the scattered light is mainly generated in the in-plane direction between the optical axis and the electric field. Therefore, a scattering member that can selectively scatter polarized light in the direction of the paper of FIG. 5 can be realized. Further, the polarization of the scattered light becomes parallel to the in-plane direction of FIG. 5, and no component perpendicular to the paper surface is generated.
[0033]
As the reverse mode polymer dispersed liquid crystal, a reverse mode holographic polymer dispersed liquid crystal in which low molecular liquid crystals are periodically distributed may be used. In this case, the display device 11 has a configuration in which a reverse mode holographic polymer dispersed liquid crystal is provided instead of the reverse mode polymer dispersed liquid crystal 25 in FIG. The reverse mode holographic polymer-dispersed liquid crystal is generally disclosed in the form of a paper or the like as follows.
[0034]
"K.Kato, T.Hisaki, M.Date," Alignment-Controlled Holographic Polymer
Dispersed Liquid Crystal for Reflective Diplay Devices ", Jpn.J. of Appl.
Phys., 38, pp. 805-808 (1999) 』
"Kato, Hisagi, Date," Holographic Polymer Dispersion Liquid Crystal with Controlled Orientation (HPDLC) ", IEICE Technical Committee on Electronic Display (EID), January 22, 1999 (IEICE EID98-139, IEICE Tech. pp.171-176)]
In this document, it is called "Alignment-Controlled HPDLC".
[0035]
<Action / Effect>
According to the display / photographing device 10 according to the first embodiment, the display device 11 that displays an image by driving the reverse mode polymer dispersed liquid crystal 25 with a plurality of electrodes and the reverse mode polymer dispersed liquid crystal 25 are always transmitted. And the camera 24 having the polarizing plate 14 that transmits only the polarized light component, the image display and the photographing of the subject can be performed at the same time, and the subject such as the human 13 can be photographed from the front. it can.
[0036]
That is, since there is no particular obstruction between the display device 11 and the person 13, the image display on the display device 11 reaches the person 13 as usual and is observed by the person 13. On the other hand, on the camera 12 side, the human 13 and the display device 11 enter the field of view, but the display light is blocked by the polarizing plate 14, and only the polarized light component that always passes through the display device 11 passes through the polarizing plate 14 and the camera Since the light is received by the display device 12, the person 13 can be photographed through the display device 11 as if the display device 11 were not provided. For this reason, the human 13 can be photographed from directly in front.
[0037]
Therefore, if a remote dialogue device as illustrated in FIG. 2 is configured by using the display / photographing device 10, a remote dialogue device in which the eyes of the interlocutors coincide with each other can be realized.
[0038]
Moreover, since a liquid crystal projector is not required, the device can be made thinner as compared with a display photographing device using a liquid crystal projector. In particular, in the present display / photographing device 10, the display device 11 has a configuration in which the light guide plate 23 is provided in close contact with the reverse mode polymer dispersed liquid crystal panel, and a cold cathode tube 28 as a light source is provided on a side portion of the light guide plate 23. Is provided to guide the light beam 29 emitted from the cold-cathode tube 28 to the reverse mode polymer-dispersed liquid crystal 25 by the light guide plate 23, so that it is significantly thinner than a case where a light source is provided in front of the display device 11 or the like. And efficiency can be improved.
[0039]
In the present display / photographing apparatus 10, the camera 12 is disposed behind the display apparatus 11, but the distance between the display apparatus 11 and the camera 12 is arbitrary. The depth of the device 10 can be reduced. Therefore, even when the camera 12 is arranged behind the display device 11, it does not hinder the thinning of the device.
[0040]
Further, the display device 11 is prevented from deteriorating the display image by preventing a person behind the display device 11 such as the camera 12 from seeing from the side of the person 13 who is the observer of the display image. It is desirable to make the back side darker than the human 13 side of the display device 11 and to paint objects such as the camera 13 black. In this case, instead of providing the polarizing plate 14 in the vicinity of the camera 12 as shown in FIG. 1, a polarizing plate having a large area corresponding to the entire display area of the display device 11 is provided in the vicinity of the back surface of the display device 11. Accordingly, the back side of the display device 11 can be easily darkened.
[0041]
The operation and effect when the reverse mode holographic polymer dispersed liquid crystal is used as the reverse mode polymer dispersed liquid crystal of the display device 11 are as follows.
The reverse mode holographic polymer-dispersed liquid crystal (R-HPDLC) is transparent in the absence of an electric field, and becomes a diffracted state with respect to one polarization component when an electric field is applied. One polarized light component of light propagating through the light plate 23 can be emitted, and image display can be realized by matrix driving. Since the display device 11 formed of the R-HPDLC does not hinder the polarization orthogonal to the display light, the person 13 can be photographed through the display device 11 and the person 13 can be photographed from the front.
[0043]
Since R-HPDLC has wavelength selectivity because diffraction is used, color display can be realized even when a white light source is used. When the R-HPDLC is used, the scattering state becomes a light emitting state. Therefore, when the display device 11 is illuminated from the human 13 side, the display device 11 emits light due to the illuminating light and the color purity is reduced. Has an angle, so that even when illuminated from the human 13 side, a display with high color purity can be realized without affecting the display.
[0044]
[Embodiment 2]
FIG. 6 is a configuration diagram of a display device of the display / photographing device according to Embodiment 2 of the present invention.
[0045]
<Structure>
The display device 11 of the first embodiment has a configuration in which the light guide plate 23 is adhered to only one surface of the reverse mode polymer dispersed liquid crystal panel (a panel including the alignment films 26 and 27 and the reverse mode polymer dispersed liquid crystal 25). However, the present invention is not limited to this, and light guide plates may be provided on both sides of the reverse mode polymer dispersed liquid crystal panel.
[0046]
That is, as shown in FIG. 6, in the display device 111 of the display / photographing device according to the second embodiment, both transparent substrates 23 and 24 are used as light guide plates to be in close contact with both surfaces of the reverse mode polymer dispersed liquid crystal panel. The light guide plates 23 and 24 are provided with a cold cathode tube 28 as a light source on the side thereof.
[0047]
Note that the other configuration of the display device 111 and the overall configuration of the display photographing device are the same as those in the first embodiment, and thus description and illustration thereof are omitted here (the above description and FIGS. 5).
[0048]
<Action / Effect>
According to the display / photographing apparatus of the second embodiment, the display device 111 has a configuration in which the light guide plates 23 and 24 are provided on both sides of the reverse mode polymer dispersed liquid crystal panel. Since the light emitted from the cathode tube 28 can be guided to the reverse mode polymer dispersed liquid crystal 25, the amount of light emitted from the reverse mode polymer dispersed liquid crystal 25 increases, and the displayed image becomes clearer.
[0049]
[Embodiment 3]
FIG. 7 is a configuration diagram of a display device of a display / photographing device according to Embodiment 3 of the present invention.
[0050]
<Structure>
The display device 11 according to the first embodiment has a configuration in which a cold cathode tube 28 as a light source is provided on a side portion of the light guide plate 23 in order to greatly reduce the thickness and increase the efficiency (see FIG. 3). Alternatively, the reverse mode polymer dispersed liquid crystal may be illuminated by ambient light from the front or the like.
[0051]
That is, as shown in FIG. 7, the display device 211 of the display / photographing device according to Embodiment 3 does not use a light guide plate, and has a configuration in which transparent substrates 23 and 24 are simply provided on both sides. The light source 212 is provided around the display device 211 (in the illustrated example, diagonally forward of the display device 211). However, even if such a dedicated light source is not provided, the dedicated light source does not necessarily have to be provided when there is sufficient ambient light (natural light or the like) around the display device 211.
[0052]
Note that the other configuration of the display / photographing device 211 and the overall configuration of the display / photographing device are the same as those in the first embodiment, and thus description and illustration thereof are omitted here (the above description and FIGS. (See FIG. 5).
[0053]
<Action / Effect>
Therefore, similarly to the first embodiment, the display and photographing apparatus of the third embodiment can simultaneously perform the image display and the photographing of the subject, and can also photograph the subject such as a human from the front. it can. That is, even when a remote interactive device is configured using this display / photographing device, it is possible to realize a remote interactive device in which the eyes of the interlocutors match. Moreover, since a liquid crystal projector is not required, the device can be made thinner as compared with a display photographing device using a liquid crystal projector.
[0054]
In particular, by illuminating the display surface of the reverse mode polymer-dispersed liquid crystal 25 with the light source 212, it is possible to increase the contrast.
[0055]
[Embodiment 4]
FIG. 8 is a configuration diagram of a display / photographing device according to Embodiment 4 of the present invention.
[0056]
<Structure>
In the display / photographing apparatus 10 according to the first embodiment, since the camera 12 photographs only a specific linearly polarized light component (see FIG. 1), the reflection on the glass surface differs from the reflection directly seen by the naked eye. There was a disadvantage.
[0057]
Therefore, as shown in FIG. 8, in the display / photographing device 310 of the fourth embodiment, a wavelength plate 311 is provided on the surface of the display device 11 on the subject side such as the human 13, and the human 13 And the like are photographed by the camera 12.
[0058]
A quarter-wave plate is used as the wave plate 311, and the display image is converted from linearly polarized light to circularly polarized light by setting the axis of the wave plate 311 to a direction different from the polarization direction of the display device 45 by 45 degrees. I have to. That is, the camera 12 captures one circularly polarized light component. Further, a higher-order wave plate may be used as the wave plate 311.
[0059]
The other configuration of the display / photographing device 310 is the same as that of the first embodiment, and thus the description and illustration thereof are omitted here (see the above description and FIGS. 1 to 5).
[0060]
<Action / Effect>
According to the display / photographing device 310 of the fourth embodiment, the wavelength plate 311 is provided on the surface of the display device 11 on the subject side, so that the camera 12 can photograph all polarization components. That is, a more natural image can be taken. As for the display image, since the wavelength plate 311 only converts the display image from linearly polarized light to circularly polarized light, the wave plate 311 has no effect on the viewing of the person 13.
[0061]
In addition, by using a higher-order wave plate as the wave plate 311, the camera 12 shoots different polarization components depending on the wavelength, so that a special object that emits circularly polarized light, such as a liquid crystal thermometer, can be shot without discomfort. can do.
[0062]
[Embodiment 5]
FIG. 9 is a configuration diagram of a display photographing apparatus according to Embodiment 5 of the present invention.
[0063]
<Structure>
In the display photographing apparatus 10 of the first embodiment, the camera 12 and the subject such as the human 13 are arranged on both sides of the display apparatus 11, respectively. However, if a mirror is provided on one surface of the display apparatus, The camera and the subject can be arranged on the other surface of the display device.
[0064]
That is, as shown in FIG. 9, in the display photographing apparatus 410 of the fifth embodiment, a hologram mirror 411 is provided as a mirror on one surface of the display device 11, and a subject such as a human 13 is provided on the other side of the display device 11. And the camera 12 are arranged. That is, a predetermined polarization component (for example, a polarization component perpendicular to the paper surface of FIG. 9) of the light emitted from the subject such as the human 13 passes through the display / photographing device 11 and is reflected by the hologram mirror 411 again. By transmitting through the display / photographing device 11, the camera 12 arranged on the subject side receives light (photographs).
[0065]
The hologram mirror 411 is also known as a hologram screen, and is a general technology used in “Fsas Glass Vision” manufactured by Fuji Support & Service Co., Ltd. The hologram mirror 411 is a kind of hologram, and is produced by recording a mirror image as a hologram. The hologram mirror 411 operates as a general mirror and forms a mirror in which the bisector of the angle between the incident light and the reflected light is inclined with respect to the perpendicular of the hologram mirror 411 by recording the image of the inclined mirror. be able to.
[0066]
The human 13 as an observer can see the image display by directly viewing the display device 11. From the position of the camera 12, a display image of the display device 11 and an image of an observer (subject) reflected on the hologram mirror 411 can be seen. However, the image caused by the display device 11 is polarized in one direction. Therefore, by providing the polarizing plate 14 for blocking the polarized light on the front surface of the camera 12, only the image of the observer (subject) can be photographed. Further, by providing a polarizing plate 14 between the display device 11 and the hologram mirror 411 to absorb the polarized light emitted by the display device 11, the contrast can be improved.
[0067]
The other configuration of the display / photographing device 410 is the same as that of the first embodiment, and thus the description and illustration thereof are omitted here (see the above description and FIGS. 1 to 5).
[0068]
<Action / Effect>
According to the display / photographing device 410 of the fifth embodiment, the hologram mirror 411 is provided as a mirror on one surface of the display device 11, and the subject such as the human 13 and the photographing device 11 are arranged on the other side of the display device 11. With this configuration, the depth can be further reduced by the thickness of the camera 12 as compared with the configuration of the first embodiment (see FIG. 1).
[0069]
Moreover, since the hologram mirror 411 is used as a mirror, the installation position of the camera 12 can be freely changed by changing the structure of the hologram.
[0070]
In the case of the fifth embodiment, an image of the camera 12 can be seen from a human 13 as an observer in an environment where the camera 12 is strongly illuminated. However, there is no technical difficulty in illuminating the subject such as the person 13 in a limited manner. Therefore, although the lighting environment at the time of use is limited, the technical feasibility of the present invention is not improved. It doesn't hurt.
[0071]
【The invention's effect】
As described above, the first embodiment has been described in detail with the embodiment.Or the secondAccording to the display / photographing device of the invention,Scattering / transmission or diffraction / transmission can be controlled by an electric field for specific polarization components, while other polarization components are always in a transmission state.A display device that displays an image by driving the reverse mode polymer dispersed liquid crystal with a plurality of electrodes,SaidBecause the reverse mode polymer-dispersed liquid crystal is configured with an imaging device having a polarizing plate that transmits only the polarized component that is always transmitted, orBirefringent small molecules in a polymer birefringent medium such that scattering / transmission or diffraction / transmission can be controlled by an electric field for a specific polarization component, and the other polarization components are always in a transmission state. A display device that displays an image by driving a reverse mode polymer dispersed liquid crystal realized by dispersing a liquid crystal with a plurality of electrodes, and a polarized light that transmits only a polarized component that is always transmitted by the reverse mode polymer dispersed liquid crystal. Because it was configured with an imaging device equipped with a plate,Not only can image display and photographing of a subject be performed simultaneously, but also a subject such as a human can be photographed from the front. Therefore, if a remote interaction device is configured using this display / photographing device, it is possible to realize a remote interaction device in which the eyes of the interlocutors match.
[0072]
Moreover, since a liquid crystal projector is not required, the device can be made thinner as compared with a display photographing device using a liquid crystal projector.
[0073]
Also,3According to the display / photographing device of the invention, the firstOr 2In the display photographing device of the invention,SaidDisplay deviceSaidA light guide plate is provided in close contact with the reverse mode polymer-dispersed liquid crystal panel, and a light source is provided on the side of the light guide plate.SaidSince the configuration is such that the liquid crystal is led to the reverse mode polymer-dispersed liquid crystal, the thickness can be significantly reduced as compared with the case where a light source is provided in front of the display device, and the efficiency can be increased.
[0074]
Also,4According to the display / photographing device of the invention,3In the display photographing device of the invention,SaidDisplay deviceSaidReverse mode polymer dispersed liquid crystal panel on both sidesSaidSince the light guide plate is provided, the light emitted from the light source can be guided to the reverse mode polymer dispersed liquid crystal by both light guide plates, so that the amount of light emitted from the reverse mode polymer dispersed liquid crystal increases. Thus, the displayed image becomes clearer.
[0075]
Also,5According to the display / photographing device of the invention, the first and second, Third or fourthIn the display photographing device of the invention,SaidWith a configuration in which the wavelength plate is provided on the surface of the display device on the subject side, the image capturing device can capture all polarized components, and can capture a more natural image.
[0076]
Also,6The display / photographing device of the invention includes first, second, third, Fourth or fifthIn the display photographing device of the invention,SaidA mirror is provided on one side of the display device,SaidThe subject on the other side of the display deviceSaidSince the imaging device is provided, the depth can be further reduced by the thickness of the imaging device as compared with the configuration in which the subject and the imaging device are provided on both sides of the display device.
[0077]
Also,7The display / photographing device of the invention6In the display photographing device of the invention,SaidSince the hologram mirror is used as the mirror, the installation position of the imaging device can be freely changed by changing the structure of the hologram.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a display photographing apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a configuration diagram of a remote interaction device using the display / photographing device.
FIG. 3 is a diagram illustrating a case where a reverse mode polymer dispersed liquid crystal of the display device is driven by a TFT method.
FIG. 4 is a diagram illustrating a case where a reverse mode polymer dispersed liquid crystal of the display device is driven by a TFT method.
FIG. 5 is an explanatory view showing the operation of the reverse mode polymer dispersed liquid crystal.
FIG. 6 is a configuration diagram of a display device of a display / photographing device according to Embodiment 2 of the present invention.
FIG. 7 is a configuration diagram of a display device of a display / photographing device according to Embodiment 3 of the present invention.
FIG. 8 is a configuration diagram of a display photographing apparatus according to Embodiment 4 of the present invention.
FIG. 9 is a configuration diagram of a display photographing apparatus according to Embodiment 5 of the present invention.
FIG. 10 is a configuration diagram of a conventional display photographing apparatus.
[Explanation of symbols]
10, 10A, 10B, 310, 410 Display photographing device
11, 11A, 11B, 111, 211 Display device
12,12A, 12B camera
13,13A, 13B human
14, 14A, 14B Polarizing plate
17 code
21,22 transparent electrode
23, 24 Transparent substrate (light guide plate)
25 Reverse mode polymer dispersed liquid crystal
26,27 alignment film
28 cold cathode tube
30 power supply
32 cover
212 light source
311 Wave plate
411 Hologram mirror

Claims (7)

Driving reverse mode polymer-dispersed liquid crystal with multiple electrodes so that scattering / transmission or diffraction / transmission can be controlled by an electric field for specific polarization components, and the other polarization components are always in a transmission state. A display device for displaying an image by
Display imaging apparatus characterized by being configured with an imaging device and provided with the polarizing plate which transmits only polarization components in which the reverse mode PDLC is always transmitted. Birefringent small molecules in a polymer birefringent medium such that scattering / transmission or diffraction / transmission can be controlled by an electric field for a specific polarization component, and the other polarization components are always in a transmission state. A display device that displays an image by driving a reverse mode polymer dispersed liquid crystal realized by dispersing the liquid crystal with a plurality of electrodes,
A display device including a polarizing plate that transmits only a polarization component that is always transmitted by the reverse mode polymer-dispersed liquid crystal. In the display imaging device according to claim 1 or 2,
Wherein with the display device is a structure provided with the reverse mode PDLC panel in close contact with the light guide plate, a light source is provided on the side of the light guide plate, the reverse mode light rays emitted from the light source by a light guide plate A display / photographing device configured to guide to a polymer-dispersed liquid crystal. The display / photographing device according to claim 3 ,
The display device display imaging device being characterized in that the structure provided with the light guide plate on both sides of the reverse mode PDLC panel. According to claim 1, in the display imaging apparatus according to 3 or 4, display imaging apparatus characterized in that a wave plate on the surface of the object side of the display device. The display / photographing device according to claim 1, 2 , 3 , 4, or 5 ,
The display one side surface of the mirror is provided on the device, the display imaging device, characterized in that arranged between the object and the imaging device on the other side surface of the display device. The display / photographing device according to claim 6 ,
A display photographing apparatus, wherein a hologram mirror is provided as the mirror.

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