WO2012147643A1 - Dispositif d'affichage d'image - Google Patents

Dispositif d'affichage d'image Download PDF

Info

Publication number
WO2012147643A1
WO2012147643A1 PCT/JP2012/060687 JP2012060687W WO2012147643A1 WO 2012147643 A1 WO2012147643 A1 WO 2012147643A1 JP 2012060687 W JP2012060687 W JP 2012060687W WO 2012147643 A1 WO2012147643 A1 WO 2012147643A1
Authority
WO
WIPO (PCT)
Prior art keywords
polarizing plate
display unit
liquid crystal
light
display device
Prior art date
Application number
PCT/JP2012/060687
Other languages
English (en)
Japanese (ja)
Inventor
山本　圭一
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012147643A1 publication Critical patent/WO2012147643A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to a video display device for displaying video in the air.
  • a mirror that generates a real image in this way is described in, for example, International Publication WO2009 / 136578A1 (Patent Document 1).
  • a mirror that generates a real image of an object on one side in this way on the other side is referred to as a “transmission imaging mirror”.
  • An image projected as a real image in the air on the near side of the transmission imaging mirror is referred to as an “aerial image”.
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2008-256883
  • Patent Document 1 describes a video display device using a transmission imaging mirror.
  • the apparatus shown in FIG. 10 of Patent Document 1 is for displaying a plurality of aerial images. More specifically, in this apparatus, as shown in FIG. 18, the images displayed separately by the two display units 903 and 904 are collected on one optical path using the half mirror 905, and the transmission imaging mirror 902 is obtained. Are simultaneously projected onto one space. As a result, aerial images 906 and 907 are formed. The observer 100 can visually recognize these two aerial images 906 and 907 together.
  • the half mirror 905 since the half mirror 905 is used, the amount of light is greatly lost before reaching the observer 100.
  • the light amount of the video output from the display unit 903 is 1 ⁇ 2 or less when transmitted through the half mirror 905.
  • the light amount of the image output from the display unit 904 is 1 ⁇ 2 or less when passing through the half mirror 905.
  • the light use efficiency must be deteriorated in this way, so if you want to achieve a certain brightness in the finally obtained image, in any of the multiple display units, It is necessary to display with a luminance more than twice the target luminance.
  • an object of the present invention is to provide an image display device that can display a plurality of aerial images and has high light utilization efficiency.
  • an image display device includes a reflective polarizing plate having a property of transmitting on the first polarization axis and reflecting on the second polarizing axis, and the first polarization of the reflective polarizing plate.
  • a first display unit that emits an image toward the reflective polarizing plate with light having a polarization axis in the same direction as the axis; and light having a polarization axis in the same direction as the second polarizing axis of the reflective polarizing plate.
  • a second display unit that emits an image toward the reflective polarizing plate; a first main surface and a second main surface facing each other; and the first display unit based on light incident from the first main surface side.
  • a transmission imaging mirror capable of generating an aerial image visible from the second main surface side outside the second main surface side, the first display unit, the second display unit, and the transmission connection
  • the image mirror is an image emitted from the first display unit and transmitted through the reflective polarizing plate.
  • the light to be used for video display is made incident on the transmission imaging mirror after determining whether the light reaching from the display unit is transmitted or reflected by the polarization state of the light.
  • a plurality of aerial images can be displayed, and an image display device with high light utilization efficiency can be realized.
  • Embodiment 3 It is a conceptual diagram of the video display apparatus in Embodiment 3 based on this invention, and is explanatory drawing in case both a 1st display part and a 2nd display part are a dark display state. It is a conceptual diagram of the video display apparatus based on a prior art.
  • the video display device 101 has a reflective polarizing plate 1 having a property of transmitting on the first polarizing axis and reflecting on the second polarizing axis, and a polarizing axis in the same direction as the first polarizing axis of the reflective polarizing plate 1.
  • the first display unit 3 that emits an image toward the reflective polarizing plate 1 with light, and the image with the light having the polarization axis in the same direction as the second polarizing axis of the reflective polarizing plate 1 are reflected on the reflective polarizing plate 1.
  • the second display unit 4 that emits light toward the screen and the transmission imaging mirror 2 are provided.
  • the transmission imaging mirror 2 has a first main surface 2a and a second main surface 2b facing each other.
  • the transmission imaging mirror 2 can generate an aerial image visible from the second main surface 2b side outside the second main surface 2b side based on light incident from the first main surface 2a side.
  • the first display unit 3, the second display unit 4, and the transmission imaging mirror 2 are emitted from the first display unit 3 and the optical axis of the image transmitted through the reflective polarizing plate 1 and from the second display unit 4.
  • the optical axes of the images reflected by the reflective polarizing plate 1 are arranged in a positional relationship such that they are incident on the first main surface 2a of the transmissive imaging mirror 2 in a state where they coincide with the optical axis of the image.
  • the light of the video emitted from the first display unit 3 has a polarization axis in the same direction as the first polarization axis.
  • the light passes through the mold polarizing plate 1 and enters the first main surface 2 a of the transmission imaging mirror 2.
  • the incident angle with respect to the first main surface 2a is defined as ⁇ 1.
  • the image light emitted from the second display unit 4 has a polarization axis in the same direction as the second polarization axis, it is reflected by the reflective polarizing plate 1. At this time, the incident angle and the reflection angle at the reflective polarizing plate 1 are ⁇ 2.
  • the light emitted from the second display unit 4 and reflected by the reflective polarizing plate 1 is transmitted through the imaging mirror in a state where the optical axis coincides with the light emitted from the first display unit 3 and transmitted through the reflective polarizing plate 1.
  • 2 is incident on the first main surface 2a. That is, any image light is incident on the first main surface 2a at an incident angle ⁇ 1.
  • the transmission imaging mirror 2 generates an aerial image outside the second main surface 2b due to its characteristics.
  • An aerial video 6 corresponding to the display content given from the first display unit 3 and an aerial video 7 corresponding to the display content given from the second display unit 4 are respectively generated.
  • the observer 100 can observe both the aerial images 6 and 7.
  • the transmission imaging mirror 2 does not lose the light amount significantly unlike the conventional half mirror, and much of the incident light amount can be used for imaging an aerial image after emission. Therefore, the image observed by the observer has a brightness comparable to the amount of light emitted from the first display unit 3 and the second display unit 4.
  • whether light transmitted from the display unit is transmitted or reflected is determined by the polarization state of the light, so that transmission and reflection are performed using a half mirror as in the past. Compared to the above, the light utilization efficiency can be increased.
  • the transmission imaging mirror 2 has a property of forming an aerial image at a position that is emitted at an equal distance to the length of the optical path of incident light from the entity.
  • L1 to L5 the distances of the respective optical paths
  • L4 L1 + L3
  • L4 + L5 L2 + L3 due to the characteristics of the transmission imaging mirror 2.
  • the transmission imaging mirror 2 has the property of forming an aerial image at a position that is emitted at an equal distance to the length of the optical path of the incident light from the entity, but the present invention is applied. In the above, the transmission imaging mirror is not limited to such characteristics.
  • the reflective polarizing plate 1 used in the present embodiment may be a multilayer laminated type, a circularly polarized light separating type, or a wire grid type. Each of these types is described in Patent Document 2. Since the optical path length changes depending on the incident angle of light in the multilayer laminated type, there is a drawback that the polarization characteristic changes depending on the incident angle. However, in this embodiment, the angle incident on the reflective polarizing plate is not vertical. Care must be taken when adopting the multilayer stack type. When adopting a circularly polarized light separation type, it should be considered that manufacturing is difficult. In this embodiment, it is particularly preferable to use a wire grid type reflective polarizing plate. Moreover, you may employ
  • Embodiment 2 With reference to FIG. 2 and FIG. 3, the video display apparatus 102 in Embodiment 2 based on this invention is demonstrated.
  • the video display device 102 in the present embodiment has basically the same configuration as the video display device 101 described in the first embodiment, but the video display device 102 has a first display unit as compared with the video display device 101. 3. The contents of the second display unit 4 are more specified.
  • the first display unit 3 is a liquid crystal display device 13 having a liquid crystal layer 3d. More preferably, the second display unit 4 is a liquid crystal display device 14 having a liquid crystal layer 4d.
  • both the first display unit 3 and the second display unit 4 are liquid crystal display devices, but only one of them may be a liquid crystal display device. More preferably, both are liquid crystal display devices. Here, an example in which both are liquid crystal display devices will be described.
  • the liquid crystal display device 13 as the first display unit 3 includes a backlight 3a, a back polarizing plate 3b, a glass substrate 3c, a liquid crystal layer 3d, a glass substrate 3e, and a front polarizing plate 3f. Includes combinations with.
  • An electrode (not shown) for applying a voltage to the liquid crystal layer 3d is formed on the glass substrate 3c and the glass substrate 3e, and a power source 3g is connected thereto.
  • a liquid crystal cell is configured to include a glass substrate 3c, a liquid crystal layer 3d, and a glass substrate 3e.
  • the liquid crystal display device 14 as the second display unit 4 includes a backlight 4a, a back polarizing plate 4b, a glass substrate 4c, a liquid crystal layer 4d, a glass substrate 4e, and a front polarizing plate 4f. Includes combinations with.
  • An electrode (not shown) for applying a voltage to the liquid crystal layer 4d is formed on the glass substrate 4c and the glass substrate 4e, and a power source 4g is connected thereto.
  • a liquid crystal cell is configured to include a glass substrate 4c, a liquid crystal layer 4d, and a glass substrate 4e.
  • the polarization axis of the transmitted light is rotated when no voltage is applied to the liquid crystal layer, whereas the transmission is performed when a voltage is applied to the liquid crystal layer. It has the property that the polarization axis of light does not change. Using this property, the direction of the polarization axis of the emitted light can be selected according to the presence or absence of voltage application in each liquid crystal cell.
  • the first display unit 3 is the liquid crystal display device 13 and the second display unit 4 is the liquid crystal display device 14, both have the property of emitting polarized light. Since the light emitted from these devices is already polarized without any additional processing, it is suitable for use as the first and second display portions in the present invention.
  • FIGS. 2 and 3 Two polarization axes orthogonal to each other are assumed. These two types of polarization axes are not necessarily perpendicular to or parallel to the plane of the paper. However, for the sake of easy understanding, the two polarization axes are the polarization axis in the direction perpendicular to the plane of the paper and the plane of the paper. And the polarization axis in the direction parallel to the. In FIG. 2 and FIG. 3, these two polarization axes are indicated by two types of symbols.
  • a symbol with a dot in a circle means that the polarization axis is in a direction perpendicular to the paper surface, and a short double-headed arrow symbol means that the polarization axis is in a direction parallel to the paper surface.
  • the polarization axes expressed by these two types of symbols are polarization axes in directions orthogonal to each other. These two types of symbols are hereinafter referred to as “polarization axis symbols”.
  • the transmission polarization axis and the absorption polarization axis of each polarizing plate included in the liquid crystal display devices 13 and 14 are indicated by polarization axis symbols in the vicinity of each polarizing plate.
  • the transmission polarization axis and the reflection polarization axis of the reflective polarizing plate 1 are indicated by polarization axis symbols in the vicinity of the reflective polarizing plate 1. 2 and 3, it is understood that the transmission polarization axis of the reflective polarizing plate 1, that is, the first polarization axis is in a direction perpendicular to the paper surface, and the reflection polarization axis, that is, the second polarization axis is in a direction parallel to the paper surface. .
  • the polarization axis of the light traveling further is indicated by the polarization axis symbol in the middle of the arrow indicating the optical path.
  • FIG. 2 shows an example in which both the first display unit 3 and the second display unit 4 are in a bright display state in the present embodiment.
  • FIG. 3 shows an example in which both the first display unit 3 and the second display unit 4 are in the dark display state in the present embodiment.
  • the bright display state and the dark display state of the liquid crystal display device 13 which is the first display unit 3 will be described.
  • the light In the bright display state of the liquid crystal display device 13, as shown in FIG. 2, when the light exits the glass substrate 3e of the liquid crystal display device 13, the light has a polarization axis in a direction perpendicular to the paper surface. Since this light coincides with the transmission polarization axis of the front polarizing plate 3 f, the light passes through the front polarizing plate 3 f and is emitted from the liquid crystal display device 13. This light enters the reflective polarizing plate 1 while maintaining the polarization axis. Since the polarization axis of the light coincides with the transmission polarization axis of the reflective polarizing plate 1, the light passes through the reflective polarizing plate 1 as it is and proceeds to the transmissive imaging mirror 2.
  • the light In the dark display state of the liquid crystal display device 13, as shown in FIG. 3, when the light exits the glass substrate 3e of the liquid crystal display device 13, the light has a polarization axis parallel to the paper surface. Since this light coincides with the absorption polarization axis of the front polarizing plate 3f, it is absorbed by the front polarizing plate 3f. This light is not emitted from the liquid crystal display device 13. Therefore, this light does not enter the reflective polarizing plate 1 and does not enter the transmission imaging mirror 2. Therefore, when the liquid crystal display device 13 is in the dark display state, the light of the backlight 3a of the liquid crystal display device 13 does not affect the display of the final aerial image.
  • the bright display state and the dark display state of the liquid crystal display device 14 which is the second display unit 4 will be described.
  • the light In the bright display state of the liquid crystal display device 14, as shown in FIG. 2, when the light exits the glass substrate 4e of the liquid crystal display device 14, the light has a polarization axis parallel to the paper surface. Since this light coincides with the transmission polarization axis of the front polarizing plate 4f, the light passes through the front polarizing plate 4f and is emitted from the liquid crystal display device 14. This light enters the reflective polarizing plate 1 while maintaining the polarization axis. Since the polarization axis of the light coincides with the reflection polarization axis of the reflective polarizing plate 1, the light is reflected as it is by the reflective polarizing plate 1 and proceeds to the transmission imaging mirror 2.
  • the light has a polarization axis in a direction perpendicular to the paper surface when it exits the glass substrate 4 e of the liquid crystal display device 14. Since this light coincides with the absorption polarization axis of the front polarizing plate 4f, it is absorbed by the front polarizing plate 4f. This light is not emitted from the liquid crystal display device 14. Therefore, this light does not enter the reflective polarizing plate 1 and does not enter the transmission imaging mirror 2. Therefore, when the liquid crystal display device 14 is in the dark display state, the light of the backlight 4a of the liquid crystal display device 14 does not affect the display of the final aerial image.
  • the transmission imaging mirror 2 When both of the liquid crystal display devices 13 and 14 are in a bright display state, the light emitted from each of the liquid crystal display devices 13 and 14 is not substantially absorbed, and the optical axes are made to coincide with each other to the transmission imaging mirror 2. It will progress towards. Based on these two types of light, the transmission imaging mirror 2 generates two aerial images 6 and 7 as shown in the first embodiment.
  • FIGS. 2 and 3 show the case where both the liquid crystal display devices 13 and 14 are in the bright display state and the case where both the liquid crystal display devices 13 and 14 are in the dark display state. Not necessarily. It is possible that one of the liquid crystal display devices 13 and 14 is in a bright display state and the other is in a dark display state. In that case, the corresponding portions can be extracted from FIGS. 2 and 3 and combined. Therefore, it is considered that two aerial images 6 and 7 generated by the transmission imaging mirror 2 are basically displayed at the same time, but one aerial image can be obtained by completely darkening one of the display units. It is also possible to display only.
  • FIG. 1 shows an example in which the generation positions of the aerial videos 6 and 7 are different.
  • the positions of the two aerial videos are not necessarily different, and two aerial videos may be generated at the same position.
  • the images are generated at different positions, it is preferable for the observer because the images can be viewed at different distance positions in the field of view, so that images with a sense of perspective can be obtained.
  • the distance L1 between the reflective polarizing plate 1 and the first display unit 3, the reflective polarizing plate 1 and the second display unit. 4 is preferably different from the distance L2. If the distances L1 and L2 are made different from each other in this way, L5 ⁇ 0, and the aerial images 6 and 7 are generated at different positions. As a result, it is possible to provide a viewer with a perspective image. It is.
  • the background 32 is displayed on the first display unit 3 as shown in FIG. 4, and the person 31 is displayed on the second display unit 4 as shown in FIG. At this time, the viewer 100 sees an image in which the person 31 and the background 32 are combined as shown in FIG.
  • the person 31 appears to be in front of the background 32, and a three-dimensional image can be obtained.
  • the area 35 overlapping the person 31 is not displayed and is in a dark state.
  • the first display unit 3 is switched to the complete dark display state as shown in FIG. 12, and at the same time, the alert information 34 is displayed on the second display unit 4 as shown in FIG. To do. By doing so, only the alert information 34 is visible to the observer as shown in FIGS. 14 and 15. Moreover, as is clear from a comparison between FIG. 11 and FIG. 15, the alert information 34 appears before the position where the normal information 33 has been displayed so far. You can give a feeling as if you were jumping out. Therefore, it is possible to attract the viewer's attention more reliably than the conventional display device.
  • the example in which the first display unit 3 and the second display unit 4 are the liquid crystal display devices 13 and 14 has been described.
  • the liquid crystal display devices 13 and 14 are capable of observing images even when taken out independently. That is, these liquid crystal display devices 13 and 14 have a structure in which polarizing plates are provided on both surfaces of a glass substrate.
  • the first display unit 3 and the second display unit 4 cause light to enter the reflective polarizing plate 1, if the light polarization axes are appropriately combined, It is possible to make the reflection type polarizing plate 1 play the role that the polarizing plate stacked on the exit side surface should play, and the polarizing plate stacked on the exit side surface of the glass substrate can be omitted. .
  • the video display apparatus 103 in Embodiment 3 based on this invention is demonstrated.
  • the first display unit 3 and the second display unit 4 are the liquid crystal display devices 23 and 24, respectively.
  • the light emitted from the liquid crystal layer 3d of the first display unit 3 is emitted from the first display unit 3 without passing through the polarizing plate.
  • the liquid crystal display device 23 that is the first display unit 3 includes a combination of a backlight 3a, a back polarizing plate 3b, a glass substrate 3c, a liquid crystal layer 3d, and a glass substrate 3e. Yes.
  • the point that the power source 3g is connected to apply a voltage to the liquid crystal layer 3d in the liquid crystal cell is the same as that described in the second embodiment, but a polarizing plate is arranged on the emission side of the glass substrate 3e. It has not been.
  • the light emitted from the liquid crystal layer 4d of the second display unit 4 is emitted from the second display unit 4 without passing through the polarizing plate.
  • the liquid crystal display device 24 that is the second display unit 4 includes a combination of a backlight 4a, a back polarizing plate 4b, a glass substrate 4c, a liquid crystal layer 4d, and a glass substrate 4e. Yes.
  • the point that the power source 4g is connected to apply a voltage to the liquid crystal layer 4d in the liquid crystal cell is the same as that described in the second embodiment, but a polarizing plate is arranged on the emission side of the glass substrate 4e. It has not been.
  • a polarizing plate overlaid on the exit side surface of a glass substrate of a conventional liquid crystal display device is transmitted and transmitted by a combination of the polarizing axis of the polarizing plate itself and the polarizing axis of the light transmitted through the liquid crystal layer.
  • the reflection type polarizing plate 1 has a function of selecting either transmission or reflection according to the polarization axis, so that the emission side of the glass substrate is used.
  • the reflective polarizing plate 1 can be made to play the role of the polarizing plate superimposed on the surface.
  • both the first display unit 3 and the second display unit 4 are liquid crystal display devices each having no polarizing plate on the exit side surface, but only one of them is such a liquid crystal display device. It may be a liquid crystal display device. It is more preferable that both the first display unit 3 and the second display unit 4 are liquid crystal display devices having no polarizing plate on the emission side surface. This is because the number of parts of the liquid crystal display device can be reduced if the polarizing plate is not necessary.
  • FIG. 16 shows an example in which the display contents of both the first display unit 3 and the second display unit 4 are to be displayed brightly in the present embodiment.
  • FIG. 17 shows an example in which the display contents of both the first display unit 3 and the second display unit 4 are to be darkly displayed in the present embodiment.
  • the liquid crystal display device 23 since the liquid crystal display device 23 is not provided with an output-side polarizing plate, the polarization axis of the emitted light is only switched in both cases of finally displaying brightly and darkly displaying, From the liquid crystal display device 23, the light of any one of the two polarization axes is emitted.
  • the liquid crystal display device 23 in operation Since the difference between the polarization axes cannot be distinguished at first glance by the human naked eye, if the liquid crystal display device 23 in operation is directly observed, light appears to be emitted in either case. Therefore, even when the display content of the liquid crystal display device 23 is finally intended for the final dark display, the liquid crystal display device 23 alone does not appear to be a dark display. Therefore, here, the state of the liquid crystal display device when the display content should finally be brightly displayed is the “bright display” of the liquid crystal display device regardless of whether or not light is actually emitted from the liquid crystal display device. It shall be called “state”. Similarly, the state of the liquid crystal display device when the display content is to be finally dark displayed is referred to as the “dark display state” of the liquid crystal display device regardless of whether light is actually emitted. .
  • the bright display state and the dark display state of the display content of the liquid crystal display device 23 which is the first display unit 3 will be described.
  • the back polarizing plate 3b In the bright display state of the liquid crystal display device 23, as shown in the left half of FIG. 16, light emitted from the backlight 3a first enters the back polarizing plate 3b.
  • the incident light includes various components, but only the component having a polarization axis parallel to the paper surface is transmitted through the back polarizing plate 3b.
  • a TN (Twisted Nematic) liquid crystal is used for the liquid crystal layer 3d and the voltage is in an off state.
  • the light transmitted through the back polarizing plate 3b transmits through the liquid crystal layer 3d, the light changes to a state having a polarization axis in a direction perpendicular to the paper surface.
  • the transmission polarization axis of the reflection type polarizing plate 1 that is, the first polarization axis is a direction perpendicular to the paper surface
  • the light that has arrived from the first display unit 3 passes through the reflection type polarization plate 1 as it is, and the transmission imaging mirror 2. Head for.
  • the final bright display is realized with respect to the first display unit 3.
  • the dark display state of the liquid crystal display device 23 it is as shown in the left half of FIG.
  • the light emitted from the backlight 3a passes through the back polarizing plate 3b and becomes light having a polarization axis parallel to the paper surface, and is incident on the liquid crystal layer 3d as in FIG. It is assumed that the voltage of the liquid crystal layer 3d is on.
  • the light transmitted through the back polarizing plate 3b does not change the polarization axis when transmitted through the liquid crystal layer 3d. This light exits from the first display unit 3 while maintaining a state having a polarization axis parallel to the paper surface, and travels toward the reflective polarizing plate 1.
  • the reflection polarization axis of the reflection type polarizing plate 1 that is, the second polarization axis is a direction parallel to the paper surface
  • the light reaching from the first display unit 3 is reflected by the reflection type polarizing plate 1. Since this light does not go to the transmissive imaging mirror 2, the first display unit 3 is finally darkly displayed. Since the light reflected by the reflective polarizing plate 1 does not go to the transmissive imaging mirror 2, it does not affect the final aerial image display.
  • the back polarizing plate 4b In the bright display state of the liquid crystal display device 24, as shown in the right half of FIG. 16, light emitted from the backlight 4a first enters the back polarizing plate 4b.
  • the incident light includes various components, but only the component having a polarization axis perpendicular to the paper surface is transmitted through the back polarizing plate 4b.
  • TN liquid crystal is used for the liquid crystal layer 4d as well as the liquid crystal layer 3d, and that the voltage is off in the bright display state.
  • the light transmitted through the back polarizing plate 4b is transmitted through the liquid crystal layer 4d, the light changes to a state having a polarization axis in a direction parallel to the paper surface.
  • the dark display state of the liquid crystal display device 24 As shown in the right half of FIG.
  • the light emitted from the backlight 4a is transmitted through the back polarizing plate 4b and becomes light having a polarization axis perpendicular to the paper surface, and is incident on the liquid crystal layer 4d, as shown in FIG.
  • the voltage of the liquid crystal layer 4d is assumed to be on.
  • the light transmitted through the back polarizing plate 4b does not change the polarization axis when transmitted through the liquid crystal layer 4d. This light exits from the first display unit 4 while maintaining a state having a polarization axis perpendicular to the paper surface, and travels toward the reflective polarizing plate 1.
  • the transmission polarization axis of the reflection type polarizing plate 1 that is, the first polarization axis is a direction perpendicular to the paper surface
  • the light reaching from the second display unit 4 is transmitted through the reflection type polarizing plate 1. Since this light does not go to the transmission imaging mirror 2, the second display unit 4 is finally darkly displayed. Since the light transmitted through the reflective polarizing plate 1 does not go to the transmissive imaging mirror 2, it does not affect the final display of the aerial image.
  • light is not emitted from the dark display state display unit.
  • light is also emitted from the dark display state display unit, and this light is reflected. Since the light is only propagated to a different side from the transmissive imaging mirror 2 by reflection or transmission at the polarizing plate 1, the light is not reflected by any member and directed to the transmissive imaging mirror 2. It is desirable to consider when designing the structure.
  • the brightness and darkness of the entire image of each liquid crystal display device as the first display unit and the second display unit has been described.
  • the brightness of the pixel in the liquid crystal display device as the first display unit and the liquid crystal as the second display unit It can be considered as a combination between brightness and darkness of the pixel in the display device.
  • the first polarization axis of the reflective polarizing plate is a direction perpendicular to the paper surface
  • the second polarization axis is the paper surface.
  • the direction of the polarization axis is not limited to this.
  • the polarization axes of light emitted from the first display unit and the second display unit may be adjusted as appropriate.
  • the present invention can be used for an image display device for displaying an image in the air.
  • SYMBOLS 1 Reflective polarizing plate, 2,902 Transmission imaging mirror, 2a 1st main surface, 2b 2nd main surface, 3rd display part, 3a, 4a backlight, 3b, 4b back polarizing plate, 3c, 4c, 3e , 4e glass substrate, 3d, 4d liquid crystal layer, 3f, 4f front polarizing plate, 3g, 4g power supply, 4 second display unit, 6, 7 aerial video, 13, 14, 23, 24 liquid crystal display device, 31 person, 32 Background, 33 normal information, 34 alerting information, 100 observers, 101, 102, 103 video display device, 903, 904 display unit, 905 half mirror, 906, 907 aerial video.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

Un dispositif d'affichage d'image (101) comprend : un polariseur réfléchissant (1) ; une première partie d'affichage (3) conçue pour émettre une image vers le polariseur réfléchissant (1) grâce à de la lumière ayant un axe de polarisation dont la direction est la même que celle de l'axe de polarisation de transmission du polariseur réfléchissant (1) ; une seconde partie d'affichage (4) destinée à émettre une image vers le polariseur réfléchissant (1) grâce à de la lumière ayant un axe de polarisation dont la direction est la même que celle de l'axe de polarisation de réflexion dudit polariseur réfléchissant (1) ; et un miroir de formation d'image de transmission (2) pouvant, sur la base de la lumière provenant du côté d'une première surface principale (2a), produire, en dehors du côté d'une seconde surface principale (2b), une image aérienne visible depuis le côté de la seconde surface principale (2b). Grâce à la relation de position de la première partie d'affichage (3), de la seconde partie d'affichage (4) et du miroir de formation d'image de transmission (2), les images atteignent la première surface principale (2a) lorsque l'axe optique de l'image émise par la première partie d'affichage (3) et transmise par l'intermédiaire du polariseur réfléchissant (1) coïncide avec l'axe optique de l'image émise par la seconde partie d'affichage (4) et réfléchie sur le polariseur réfléchissant (1).
PCT/JP2012/060687 2011-04-27 2012-04-20 Dispositif d'affichage d'image WO2012147643A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-099581 2011-04-27
JP2011099581 2011-04-27

Publications (1)

Publication Number Publication Date
WO2012147643A1 true WO2012147643A1 (fr) 2012-11-01

Family

ID=47072163

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/060687 WO2012147643A1 (fr) 2011-04-27 2012-04-20 Dispositif d'affichage d'image

Country Status (1)

Country Link
WO (1) WO2012147643A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018123686A1 (fr) * 2016-12-26 2018-07-05 ソニー株式会社 Dispositif d'affichage d'image
WO2019087676A1 (fr) * 2017-11-01 2019-05-09 株式会社村上開明堂 Système d'affichage d'image
JP2019128726A (ja) * 2018-01-23 2019-08-01 富士ゼロックス株式会社 情報処理装置、情報処理システム及びプログラム
JP2019128724A (ja) * 2018-01-23 2019-08-01 富士ゼロックス株式会社 情報処理装置、情報処理システム及びプログラム

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003005130A (ja) * 2001-06-21 2003-01-08 Casio Comput Co Ltd 立体画像表示装置
JP2007264448A (ja) * 2006-03-29 2007-10-11 Casio Comput Co Ltd 表示装置
WO2009136578A1 (fr) * 2008-05-09 2009-11-12 パイオニア株式会社 Appareil d'affichage d'image spatiale

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003005130A (ja) * 2001-06-21 2003-01-08 Casio Comput Co Ltd 立体画像表示装置
JP2007264448A (ja) * 2006-03-29 2007-10-11 Casio Comput Co Ltd 表示装置
WO2009136578A1 (fr) * 2008-05-09 2009-11-12 パイオニア株式会社 Appareil d'affichage d'image spatiale

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018123686A1 (fr) * 2016-12-26 2018-07-05 ソニー株式会社 Dispositif d'affichage d'image
WO2019087676A1 (fr) * 2017-11-01 2019-05-09 株式会社村上開明堂 Système d'affichage d'image
CN111295615A (zh) * 2017-11-01 2020-06-16 株式会社村上开明堂 图像显示系统
JPWO2019087676A1 (ja) * 2017-11-01 2020-12-10 株式会社村上開明堂 画像表示システム
JP7134181B2 (ja) 2017-11-01 2022-09-09 株式会社村上開明堂 画像表示システム
JP2019128726A (ja) * 2018-01-23 2019-08-01 富士ゼロックス株式会社 情報処理装置、情報処理システム及びプログラム
JP2019128724A (ja) * 2018-01-23 2019-08-01 富士ゼロックス株式会社 情報処理装置、情報処理システム及びプログラム
JP7040041B2 (ja) 2018-01-23 2022-03-23 富士フイルムビジネスイノベーション株式会社 情報処理装置、情報処理システム及びプログラム

Similar Documents

Publication Publication Date Title
JP2009015128A (ja) 立体画像表示装置
JP4717778B2 (ja) 多重奥行き表示装置および多重奥行き表示方法
US8917269B2 (en) Two dimensional displays, transparent displays, and three dimensional displays
US20080204874A1 (en) Highly efficient 2d/3d switchable stereoscopic display apparatus
JP4386040B2 (ja) 電気光学装置及び電子機器
US20140118825A1 (en) Stereoscopic image display apparatus and stereoscopic image display method
US9191660B2 (en) Stereoscopic projection device and display method thereof
JP2007004179A (ja) ２次元兼用の立体映像表示装置
JP2011519052A (ja) フレネルレンズ要素を有する自動立体ディスプレイ
JP6340867B2 (ja) 電気光学装置
WO2014208420A1 (fr) Dispositif de projection d'images, système de projection d'images, procédé de projection d'images, et dispositif d'affichage
JP4608947B2 (ja) 液晶表示装置
WO2012147643A1 (fr) Dispositif d'affichage d'image
JP4703477B2 (ja) ３次元表示装置
JP2011128633A (ja) ３次元表示装置
JP2008281605A (ja) 液晶表示パネル、立体画像表示装置及び液晶タッチパネル装置
EP3570095A1 (fr) Afficheur à cristaux liquides pour un affichage proche de l'oeil, un affichage de réalité virtuelle ou un affichage à réalité augmentée
US20150323801A1 (en) Display device and display system
JP6507575B2 (ja) 光学装置および表示装置
JP4946211B2 (ja) 被観察体への補助情報付加装置
JP2012220774A (ja) 頭部装着型表示装置
JP5031909B2 (ja) ３次元表示装置
JP2009063914A (ja) 表示装置
KR20160080229A (ko) 입체 영상 표시 장치
JP4627334B1 (ja) 立体画像表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12776602

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12776602

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP