WO2010146943A1 - 液晶シャッターめがね - Google Patents
液晶シャッターめがね Download PDFInfo
- Publication number
- WO2010146943A1 WO2010146943A1 PCT/JP2010/057565 JP2010057565W WO2010146943A1 WO 2010146943 A1 WO2010146943 A1 WO 2010146943A1 JP 2010057565 W JP2010057565 W JP 2010057565W WO 2010146943 A1 WO2010146943 A1 WO 2010146943A1
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- WIPO (PCT)
- Prior art keywords
- liquid crystal
- crystal shutter
- shutter glasses
- electrode
- electrodes
- Prior art date
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
- G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2213/00—Details of stereoscopic systems
- H04N2213/008—Aspects relating to glasses for viewing stereoscopic images
Definitions
- the present invention relates to liquid crystal shutter glasses, and more particularly, to liquid crystal shutter glasses for observing a time division display that displays a plurality of images in a time division manner.
- a time-division display system having a time-division display that displays a plurality of images in a time-division manner and liquid crystal shutter glasses has been proposed or developed.
- a time-division display system for example, there is a stereoscopic display system for allowing an observer to perceive a stereoscopic image.
- FIG. 1 is a schematic diagram showing an example of a stereoscopic display system.
- the stereoscopic display system includes a liquid crystal display device 100 that is a time-division display, and liquid crystal shutter glasses 101.
- the liquid crystal shutter glasses 101 include a right eye liquid crystal shutter 101a and a left eye liquid crystal shutter 101b.
- the liquid crystal display device 100 alternately displays right-eye images and left-eye images.
- Each of the right-eye liquid crystal shutter 101a and the left-eye liquid crystal shutter 101b has a transmission state that transmits light and a shielding state that blocks light in synchronization with the display of each of the right-eye image and the left-eye image. Switch.
- the right eye image is incident on the right of the observer 102 and the left eye image is incident on the left of the observer 102.
- the observer can perceive a stereoscopic image.
- time division display system there is a multi-view display system for allowing a plurality of observers to perceive different images.
- a multi-view display system is described in Patent Document 1.
- the configuration of the multi-view display system is the same as that of the stereoscopic display system shown in FIG.
- the liquid crystal display device 100 sequentially displays images directed to each of a plurality of observers.
- the liquid crystal shutter glasses 101 used by each of the plurality of observers are switched between a transmission state and a blocking state in synchronization with display of an image directed to the own observer. This makes it possible for each of a plurality of observers to perceive different images.
- FIG. 2 is an explanatory diagram for explaining an example of the operation of the multi-view display system.
- each of three observers 102a to 102c uses the liquid crystal shutter glasses 101.
- the liquid crystal display device 100 displays images in the order of image A1, image B1, image C1, and image A2.
- the liquid crystal shutter glasses 101 of the observer 102a are in a transmissive state when images A1 and A2 are displayed, and are in a shielded state when other images are displayed. Thereby, the observer 102a perceives the images A1 and A2 continuously.
- the liquid crystal shutter glasses 101 of the observer 102b are in a transmissive state when the image B1 is displayed, and are in a shielded state when other images are displayed. Further, the liquid crystal shutter glasses 101 of the observer 102c are in a transmissive state when the image C1 is displayed, and are in a shielding state when other images are displayed. As a result, the observer 102b perceives the image B1, and the observer 102c perceives the image C1.
- each of the observers 102a to 102c perceives a different image.
- time-division display system there is a secure display system that allows only a user of liquid crystal shutter glasses to perceive a display image.
- a secure display system by using a display of a portable information terminal such as a notebook personal computer as the time-division display, a highly confidential portable information terminal can be realized.
- FIG. 3 is a schematic diagram showing an example of a secure display system.
- the time-division display 104 of the information portable terminal 103 displays an image and its inverted image, such as an image A, an inverted image A ′ of the image A, an image B, and an inverted image B ′ of the image B. Display alternately.
- the image A and B cannot be perceived by an observer who is not wearing the liquid crystal shutter glasses 101 because the image and the inverted image are integrated and an achromatic image is perceived.
- liquid crystal shutter glasses 101 are in a transmissive state in synchronization with the display of the images A and B, and are in a shielded state in synchronization with the display of the reversed images A ′ and B ′, the liquid crystal shutter glasses 101 are attached.
- the observer 102 can perceive images A and B.
- the liquid crystal shutter glasses switch between transmission and shielding not only for display light from the time-division display but also for ambient light other than display light. Therefore, there is a problem that the observer feels flickering due to ambient light.
- the ambient light contains light emitted from a light source that flashes momentarily, such as a fluorescent lamp
- the liquid crystal shutter glasses are switched between the transmission state and the shielding state, and the lighting cycle of the light source The flicker that the observer feels increases.
- Patent Document 2 As a technique capable of reducing flicker due to ambient light, there are a stereoscopic image recognition device described in Patent Document 2 and a stereoscopic image display device described in Patent Document 3.
- the stereoscopic image recognition apparatus described in Patent Document 2 includes a CRT and liquid crystal shutter glasses.
- a linear polarization filter is provided on the display screen of the CRT.
- the liquid crystal shutter glasses a liquid crystal encapsulated glass plate in which liquid crystal is encapsulated and a linear polarizing filter are laminated, and the liquid crystal encapsulated glass plate is disposed on the CRT side.
- the display light from the CRT becomes polarized light
- the direction of polarization of the light transmitted through the liquid crystal in the liquid crystal encapsulated glass plate is switched to switch between transmission and shielding of the display light. It becomes possible.
- the ambient light is not polarized light, the ambient light is not shielded even when the display light is shielded by the liquid crystal shutter glasses. For this reason, ambient light is always transmitted through the liquid crystal shutter glasses, and flicker due to ambient light can be reduced.
- the stereoscopic image display device described in Patent Document 3 includes a color picture tube and polarized glasses.
- a liquid crystal layer is provided on the display screen of the color picture tube.
- the direction of polarization of the display light from the color picture tube is switched by the liquid crystal layer, so that it is possible to switch between transmission and shielding of the display light using polarized glasses.
- the ambient light is not shielded by the liquid crystal shutter glasses, it is possible to reduce the flicker caused by the ambient light.
- FIG. 4A is a side view showing liquid crystal shutter glasses in which a part of the lens portion is a liquid crystal shutter
- FIG. 4B is an observer observing a time-division display using the liquid crystal shutter glasses shown in FIG. 4A. It is explanatory drawing which showed the mode.
- the lens portion 200 of the liquid crystal shutter glasses is supported by a frame 201.
- the lens portion 200 is formed with a liquid crystal shutter 202 having a diameter smaller than the lens diameter.
- the liquid crystal shutter 202 includes a liquid crystal cell 203 and a pair of polarizing layers 204 sandwiching the liquid crystal cell 203.
- the observer 210 observes the time division display 212 in the visual field range 211A. At this time, if the display light from the time-division display 212 is incident on the liquid crystal shutter 202, the transmission state and the shielding state of the liquid crystal shutter 202 are switched, so that the transmission and the shielding of the display light 221 are switched.
- the ambient light 222 emitted from the fluorescent lamp 213 or the like is incident on the eyes of the observer 210 without passing through the liquid crystal shutter 202 of the lens part 200 from the visual field range 211B around the observer's visual field range 211A. To do. In this case, since transmission and shielding of the ambient light 222 are not switched, flickering felt by the observer 210 can be reduced.
- liquid crystal shutter glasses using a part of the lens portion as a liquid crystal shutter or technologies related thereto are described in Patent Documents 4 to 11.
- Patent Documents 2 and 3 have the following problems.
- the polarization plane of the polarization filter provided on the liquid crystal shutter glasses and the polarization plane of the polarization filter provided on the display screen of the display device are formed.
- the face-to-face angle must be maintained at a predetermined angle.
- the liquid crystal shutter glasses cannot sufficiently transmit and shield the light. For example, a part of the display light is transmitted even though the liquid crystal shutter glasses are shielded, and the observer Such as being incident on the eyes. In this case, even the light that should not be incident is incident on the eyes of the observer, and the observer cannot perceive a good image.
- the face-to-face angle changes according to the positional relationship between the observer and the display device, the inclination of the observer's body and the liquid crystal shutter glasses, and it is difficult to maintain the face-to-face angle at a predetermined angle. is there.
- the display light from the CRT or color picture tube must be polarized light. For this reason, when a display device that outputs light that is not polarized light, such as a CRT, plasma display, or organic EL display, is used as a time-division display, it is necessary to provide a polarizing filter on the display screen of the display device.
- a display device that outputs light that is not polarized light such as a CRT, plasma display, or organic EL display
- the display device when used as a normal display that does not perform time-division display of an image, the display light from the display device is attenuated by the polarizing filter, which causes a problem that the display image becomes dark.
- the technology for reducing flicker by using a liquid crystal shutter as a part of the lens portion of the liquid crystal shutter glasses has the following problems.
- FIG. 5 is an explanatory diagram for explaining a problem of the technology in which a part of the lens portion of the liquid crystal shutter glasses is a liquid crystal shutter.
- FIG. 5 shows a state in which the observer 300 observes the time-division display displays 302 and 303 using the liquid crystal shutter glasses 301. Note that a part of the lens portion of the liquid crystal shutter glasses 301 is the liquid crystal shutter 301A.
- the display screen of the time division display 303 is smaller than the display screen of the time division display 302.
- the display light 304A from the time-division display display 302 is incident on the liquid crystal shutter 301A, and the ambient light 305A other than the display light 304A is not incident on the liquid crystal shutter 301. .
- the ambient light 305A is not incident on the liquid crystal shutter 301.
- transmission and shielding of the ambient light 305A are not switched, a good image can be provided to the viewer 300.
- the display screen of the time-division display 303 is smaller than the display screen of the time-division display 302, so that instead of the display light 304A, time-division is performed.
- the display light 304B of the display 303 and the ambient light 305B other than the display light 304B are incident on the liquid crystal shutter 301A. For this reason, transmission and shielding of the ambient light 305B are switched, and the observer feels flicker.
- ambient light may enter the liquid crystal shutter 301A as in the case where the viewer 300 observes the time-division display 303 from the same position. is there.
- Patent Documents 4 to 11 there is no description about reducing flicker, and this problem cannot be solved.
- An object of the present invention is to provide liquid crystal shutter glasses that solve the above-described problem that when the observer's situation changes, it is impossible to maintain the provision of a good image.
- the liquid crystal shutter glasses according to the present invention include a liquid crystal shutter having a transmission shielding region capable of switching between a transmission state transmitting light and a shielding state blocking light, and at least a part of the transmission shielding region.
- Liquid crystal shutter glasses including drive means for switching between the transmission state and the shielding state of a certain drive area, and control means for adjusting at least one of the size and position of the drive area.
- FIG. 6 is a front view showing the appearance of the liquid crystal shutter glasses according to the first embodiment of the present invention.
- the liquid crystal shutter glasses 1 have a liquid crystal shutter 2, a glasses frame 3, and a control device 4.
- the liquid crystal shutter 2 is provided in the lens portion of the liquid crystal shutter glasses 1.
- the liquid crystal shutter 2 is a liquid crystal element having a transmission shielding region capable of switching between a transmission state that transmits light and a shielding state that blocks light. More specifically, the liquid crystal shutter 2 includes a liquid crystal shutter 2A for the right eye and a liquid crystal shutter 2B for the left eye, and each of the liquid crystal shutters 2A and 2B has a transmission shielding region. Note that the entire area of the liquid crystal shutter 2 may be a transmission shielding area, or a part of the liquid crystal shutter 2 may be a transmission shielding area.
- the control device 4 is connected to the liquid crystal shutter 2 via the wiring 4A.
- the control device 4 may be built in the eyeglass frame 3.
- the control device 4 switches between the transmission state and the shielding state of the driving area which is at least a part of the transmission shielding area of each of the liquid crystal shutters 2A and 2B.
- FIG. 7 is a block diagram showing a configuration example of the control device 4.
- the control device 4 includes a drive unit 51 and a control unit 52.
- the driving unit 51 switches between the transmission state and the shielding state of the driving area which is at least a part of the transmission shielding area.
- the control unit 52 adjusts at least one of the size and the position of the drive region where the drive unit 51 switches the state. Further, for example, the liquid crystal shutter glasses 1 have an operation unit (not shown) for adjusting the drive region, and the control unit 52 determines the size and position of the drive region according to the operation of the operation unit by the observer. Adjust at least one of
- FIG. 8A to 8C are explanatory diagrams showing an example of the transmission shielding area and the driving area.
- the transmission shielding region 21 and the drive region 22 of the liquid crystal shutter 2B are shown.
- a transmission shielding region 21 and a drive region 23 of the liquid crystal shutter 2B are shown.
- the transmission shielding area 21 and the drive area 24 of the liquid crystal shutter 2B are shown.
- the drive regions 22 to 24 are three elliptical regions having the same center and different sizes.
- the drive area 24 is the same area as the transmission shielding area 21.
- control unit 52 adjusts the drive region in which the drive unit 51 switches the state to any one of the drive regions 22 to 24.
- the liquid crystal shutter 2 has a transmission shielding region that can be switched between a transmission state that transmits light and a shielding state that blocks light.
- the drive unit 51 switches between a transmission state and a shielding state of a driving region that is at least a part of the transmission shielding region.
- the control unit 52 adjusts at least one of the size and the position of the drive region where the drive unit 51 switches the state.
- FIG. 9A and FIG. 9B are explanatory diagrams for explaining that the flickering feeling can be suppressed even when the observer's situation changes.
- FIG. 9A shows a state where the observer 60 observes the time-division display displays 61 and 62 using the liquid crystal shutter glasses 1. It is assumed that the display screen of the time division display 62 is smaller than the display screen of the time division display 61.
- the display light 61A from the time division display 61 is incident on the driving area 63 of the liquid crystal shutter glasses 1, but the ambient light 64A other than the display light 61A is not in the driving area. It is assumed that the light is not incident on 63. In this case, since the transmission and shielding of the ambient light 64A are not switched, the observer does not feel flicker.
- the display screen of the time-division display 62 is smaller than the display screen of the time-division display 61. Therefore, instead of the display light 61A, the time-division display 62 is displayed.
- the transmission and shielding of the ambient light 64B are switched according to the switching of the transmission state and the shielding state of the driving area 63, and the observer 60 feels flicker.
- the drive region 63 is adjusted such that the display light 62A is incident and the ambient light 64B is not incident, the ambient light 64B is transmitted and shielded even if the transmission state and the shield state of the drive region 63 are switched. Since it cannot be switched, the observer 60 does not feel flicker.
- FIG. 9B shows a state in which the viewer 60 observes the time-division display 61 from different distances using the liquid crystal shutter glasses 1.
- the drive region 63 into which the display light 61A from the entire display screen of the time division display 61 is incident may be small. At this time, if the size of the drive region 63 does not change, the ambient light 64A other than the display light 61A is incident on the drive region 63, and the observer feels flicker.
- the driving region 63 is observed if the driving region 63 is reduced such that the display light 62A is incident and the ambient light 64A is not incident. Person 60 does not feel flicker.
- the drive area is adjusted. Even when the situation of the observer changes, it becomes possible to maintain the provision of a good image.
- FIG. 10 is a cross-sectional view of the liquid crystal shutter 2. More specifically, FIG. 10 is a cross-sectional view taken along the line AA of the liquid crystal shutter 2A shown in FIG.
- the liquid crystal shutter 2A has a pair of polarizing layers 5A and 5B and a liquid crystal cell 10 sandwiched between the polarizing layers 5A and 5B.
- Each of the polarizing layers 5A and 5B transmits linearly polarized light in a predetermined light transmission axis direction of incident light.
- the light transmission axis directions of the polarizing layers 5A and 5B are different from each other. It is assumed that the polarizing layer 5A is formed on the front surface of the liquid crystal shutter glasses 1.
- the liquid crystal cell 10 has a pair of transparent substrates 11A and 11B, a pair of electrodes 12A and 12B, a liquid crystal layer 13, and a pair of alignment films 14A and 14B.
- the transparent substrates 11A and 11B are arranged to face each other.
- the polarizing layers 5A and 5B are formed on the surfaces of the transparent substrates 11A and 11B opposite to the surfaces facing each other.
- the polarizing layer 5A is formed on the transparent substrate 11A
- the polarizing layer 5B is formed on the transparent substrate 11B.
- the electrode 12A is formed on the surface of the transparent substrate 11A facing the transparent substrate 11B, and the electrode 12B is formed on the surface of the transparent substrate 11B facing the transparent substrate 11A.
- the liquid crystal layer 13 is sealed between the electrodes 12A and 12B.
- the peripheral portions of the transparent substrates 11A and 11B are bonded together using the sealing material 15, and the liquid crystal layer 13 is sealed in the space surrounded by the sealing material 15.
- the liquid crystal layer 13 may be formed of, for example, a nematic liquid crystal material such as a TN type or a VA type, or may be formed of a smectic liquid crystal material such as an SSFLC type.
- the alignment film 14A is formed between the electrode 12A and the liquid crystal layer 13
- the alignment film 14B is formed between the electrode 12B and the liquid crystal layer 13.
- the alignment films 14A and 14B change the orientation of the liquid crystal molecules in the liquid crystal layer 13 and transmit the liquid crystal shutter 2A (more specifically, the liquid crystal layer 13).
- the orientation process is performed so that the state and the shielding state are switched.
- the alignment process is, for example, a rubbing process.
- the light transmission axis directions of the polarizing layers 5A and 5B are orthogonal to each other, and the liquid crystal layer 13 is formed of a TN type nematic liquid crystal material.
- the liquid crystal alignment direction on the polarizing layer 5A side of the liquid crystal layer 13 is parallel to the light transmission axis direction of the polarizing layer 5A
- the liquid crystal alignment direction on the polarizing layer 5B side of the liquid crystal layer 13 is the light transmission axis of the polarizing layer 5B.
- the alignment films 14A and 14B are aligned so as to be parallel to the direction. As a result, the twist angle of the liquid crystal layer 13 becomes 90 °.
- the liquid crystal shutter 2A is in a transmissive state.
- the liquid crystal shutter 2A is in a shielding state.
- the orientation of the liquid crystal molecules in the liquid crystal layer 13 does not change unless a voltage equal to or higher than a threshold value determined according to the liquid crystal layer 13 is applied. For this reason, it is assumed that a voltage equal to or higher than the threshold is applied between the electrodes 12A and 12B during voltage application.
- the liquid crystal shutter 2A may be formed so as to be in a shielding state when no voltage is applied and to be in a transmitting state when a voltage is applied. However, as described above, the liquid crystal shutter 2A is in a transmitting state when no voltage is applied and shields when a voltage is applied. It is desirable to be formed so as to be in a state. That is, the liquid crystal shutter 2A is preferably a normally white liquid crystal shutter. In the following, it is assumed that the liquid crystal shutter 2A is a normally white liquid crystal shutter. This is to ensure the observer's field of view when there is no need to switch the state of the transmission shielding area.
- At least one of the electrodes 12A and 12B is a divided electrode divided into a plurality of individual electrodes.
- the divided electrode has, for example, a center electrode and an outer peripheral electrode surrounding the center electrode as individual electrodes.
- the outer peripheral electrode should just be 1 or more.
- the electrode 12B is a divided electrode, and has a center electrode 16 and outer peripheral electrodes 17A and 17B surrounding the center electrode 16.
- the electrode 12A is a uniform electrode that is not divided into a plurality of individual electrodes.
- FIG. 11 shows the center electrode 16 and the outer peripheral electrodes 17A and 17B. As shown in FIG. 11, the outer peripheral electrode 17A surrounds the center electrode 16, and the outer peripheral electrode 17B surrounds the center electrode 16 and the outer peripheral electrode 17A.
- the region of the liquid crystal layer 13 corresponding to the electrode to which the voltage is applied becomes the drive region. That is, a drive region is a region sandwiched between the electrode to which the voltage is applied and the electrode 12A facing the electrode.
- the region sandwiched between the center electrode 16 and the electrode 12A in the liquid crystal layer 13 is in a shielding state, and in other regions, The transmission state is maintained.
- the region sandwiched between the center electrode 16 and the electrode 12A returns to the transmission state. Therefore, a region sandwiched between the center electrode 16 and the electrode 12A is a drive region.
- Each electrode in the divided electrode is formed by patterning, for example, on the same layer on the transparent substrate.
- 12 and 13 are plan views showing the center electrode 16 and the outer peripheral electrodes 17A and 17B formed in the same layer on the transparent substrate 11B.
- each of the center electrode 16 and the outer peripheral electrodes 17A and 17B is formed in the same layer of the transparent substrate 11B.
- the electrode extraction portions 18 of the center electrode 16 and the outer peripheral electrodes 17A and 17B are provided in the same direction.
- the electrode extraction portions 18A of the center electrode 16 and the outer peripheral electrode 17B are provided in the same direction, and the electrode extraction portions 18B of the outer peripheral electrode 17A are provided in the opposite direction.
- non-transparent shielding region between the central electrode 16 and the outer peripheral electrode 17A and between the outer peripheral electrodes 17A and 17B where the transmission state and the shielding state are not switched.
- the non-transparent shielding area can be made very small, it is possible to prevent the observer from perceiving light leakage from the non-transparent shielding area.
- light leakage from the non-transparent shielding region may be suppressed by providing a black matrix layer that shields light in this non-transparent shielding region.
- each electrode in the divided electrode may be disposed through an insulating layer, for example.
- FIG. 14 is a cross-sectional view showing the center electrode 16 and the outer peripheral electrodes 17A and 17B formed through the insulating layer.
- the center electrode 16 is provided on the transparent substrate 11B.
- An insulating layer 19A is provided on the center electrode 16, and an outer peripheral electrode 17A is provided on the insulating layer 19A.
- an insulating layer 19B is provided on the outer peripheral electrode 17A, and an outer peripheral electrode 17B is provided on the insulating layer 19B.
- An insulating layer 19C is provided on the outer peripheral electrode 17B.
- the electrodes 12A and 12B may both be divided electrodes. However, when one of the electrodes is a uniform electrode, the divided electrode is disposed so that the extraction portion of the divided electrode does not overlap the uniform electrode. It becomes possible to make the take-out portion inconspicuous.
- the electrode take-out portions 18A and 18B can be made inconspicuous by arranging the electrode take-out portions 18A and 18B so as not to overlap the electrode 12A that is a uniform electrode. Become.
- the center electrode 16 has an elliptical shape in which the long axis direction is parallel to the left-right direction of the liquid crystal shutter glasses 1 as shown in FIG. 11, or the longitudinal direction is the liquid crystal shutter glasses 1 as shown in FIG. It is desirable that the rectangular shape is parallel to the horizontal direction. In this case, it is preferable that the shapes of the inner periphery and the outer periphery of the outer peripheral electrode are similar to the shapes of the inner periphery and the outer periphery of the center electrode.
- the center point 16A of the center electrode 16 is disposed inside the center lines 16B of the liquid crystal shutters 2A and 2B in the left-right direction (BB direction) of the liquid crystal shutter glasses 1. It is preferred that That is, the center point 16A of the center electrode 16 included in each of the liquid crystal shutters 2A and 2B is preferably located between the center line 16B of the liquid crystal shutter and another liquid crystal shutter.
- the driving unit 51 switches the transmission state and the shielding state of the driving region according to the divided electrodes by applying a voltage to the individual electrodes, and the control unit 52 By selecting an individual electrode to which the drive unit 51 applies a voltage, at least one of the size and position of the drive region can be adjusted.
- the liquid crystal shutter 2 includes a pair of transparent substrates 11A and 11B, electrodes 12A and 12B formed on the transparent substrates 11A and 11B, respectively, and a liquid crystal layer 13 sealed between the electrodes 12A and 12B. And a pair of polarizing layers 5A and 5B sandwiching the transparent substrates 11A and 11B. At least one of the electrodes 12A and 12B is a divided electrode divided into a plurality of individual electrodes.
- the drive unit 51 applies a voltage to the individual electrode to switch the state of the drive region.
- the control unit 52 adjusts at least one of the size and position of the drive region by selecting the individual electrode to which the drive unit applies the voltage.
- the liquid crystal shutter 2 has both the polarizing layers 5A and 5B, the angles formed by the respective polarization planes of the polarizing layers 5A and 5B can always be maintained at a predetermined angle. Accordingly, it is possible to appropriately transmit and shield light by the liquid crystal shutter 2, and it is possible to provide a better image to the observer.
- the display light of the time division display does not have to be polarized light. Therefore, even if a display device that outputs light that is not polarized light is used in a time-division display, it is not necessary to provide a polarizing filter in the time-division display. Therefore, when used as a normal display that displays a normal image that does not require time-division display, the normal image can be prevented from becoming dark.
- the ambient light 20A that has passed through other than the drive region 20 passes through the polarizing layers 5A and 5B.
- the ambient light 20A incident on the eyes of the observer becomes dark. This enlarges the pupil of the observer's eyes. Therefore, it is possible to make the viewer feel the display image on the time-division display bright, and to provide a better image.
- the divided electrode has a center electrode 16 and outer peripheral electrodes 17A and 17B surrounding the center electrode as individual electrodes.
- the center electrode 16 has an elliptical shape whose major axis direction is parallel to the left-right direction of the liquid crystal shutter glasses 1 or a rectangular shape whose longitudinal direction is parallel to the left-right direction of the liquid crystal shutter glasses 1.
- the center point 16A of the center electrode 16 of each of the liquid crystal shutters 2A and 2B is preferably located between the center line 16B of the liquid crystal shutter and another liquid crystal shutter.
- the center of the driving area can be arranged between the front direction of the face and the center direction of the face, which makes it easy for the observer's line of sight to face, so that the time-division display that is incident on the observer's eyes It is possible to appropriately transmit and shield the display light from the display.
- FIG. 19 is a plan view showing another example of the electrodes 12A and 12B.
- both electrodes 12A and 12B are divided electrodes.
- the electrode 12A has a plurality of line electrodes 30A as individual electrodes, and the electrode 12B has a plurality of line electrodes 30B as individual electrodes.
- the line electrode is a rectangular electrode.
- Each of the line electrodes 30A is juxtaposed in a certain direction, and each of the line electrodes 30B is juxtaposed in a direction different from the line electrode 30A.
- Each of the line electrodes 30A intersects with each of the line electrodes 30B. Accordingly, the electrodes 12A and 12B form a matrix electrode pair.
- each of the line electrodes 30A and each of the line electrodes 30B are orthogonal to each other.
- the controller 52 selects the line electrodes 31A and 31B to which the voltage is applied from the line electrodes 30A and 30B.
- the drive unit 51 applies a voltage to the line electrodes 31A and 31B determined by the control unit 52.
- the potential difference between the line electrodes 31A and 31B is equal to or greater than the threshold value at which the liquid crystal molecules in the liquid crystal layer 13 change, and the potential difference between each of the line electrodes 31A and 31B and the line electrode 30A or 30B to which no voltage is applied.
- the drive unit 51 applies a voltage to the line electrodes 31A and 31B so as to be less than the threshold value.
- the region sandwiched between the line electrodes 31A and 31B becomes the drive region 32. Therefore, at least one of the size and position of the drive region 32 can be adjusted by selecting the line electrodes 30A and 30B to which the control unit 52 applies a voltage.
- the drive region 32 also shifts to the right, and if the number of line electrodes 31A and 31B decreases, the drive region 32 becomes smaller.
- FIG. 21 is a plan view showing the electrode 12B divided in a lattice shape.
- the individual electrodes 35 included in the electrode 12B are arranged in a grid pattern.
- the electrode 12A has a plurality of line electrodes 31A
- the electrode 12B has a plurality of line electrodes 31B.
- Each of the line electrodes 31A intersects with each of the line electrodes 31B.
- at least one of the electrodes 12A and 12B may be divided in a lattice shape.
- FIG. 22 is a block diagram showing a configuration of the liquid crystal shutter glasses 1 of the present embodiment.
- the liquid crystal shutter glasses 1 include a liquid crystal shutter 2, a control device 4 having a drive unit 51 and a control unit 52, a signal receiver 53, and a sensor 54.
- the signal receiver 53 receives the synchronization signal from the time division display 55.
- the synchronization signal indicates the timing for switching the transmission state and the shielding state of the liquid crystal shutter 2.
- infrared wireless communication Bluetooth (registered trademark) wireless communication, or the like can be used.
- the sensor 54 is an example of a detection means.
- the sensor 54 detects the line of sight of an observer of liquid crystal glasses.
- the control unit 52 adjusts at least one of the size and position of the drive region according to the line of sight detected by the sensor 54.
- the sensor 54 detects the direction of the observer's line of sight.
- the control unit 52 specifies the position and size of the drive region such that the line-of-sight direction detected by the sensor 54 is within the drive region, and selects an electrode corresponding to the drive region.
- the driving unit 51 switches the transmission state and shielding state of the driving region by applying a voltage to the electrode selected by the control unit 52 in synchronization with the timing indicated by the synchronization signal received by the signal receiver 53.
- FIG. 23 is a front view showing the appearance of the liquid crystal shutter glasses 1 of the present embodiment.
- FIG. 23 shows the liquid crystal shutter 2, the spectacle frame 3, the control device 4, the signal receiver 53, and the sensor 54 in the liquid crystal shutter glasses 1.
- the signal receiver 53 is provided at the bridge of the glasses frame 3.
- the sensor 54 includes a right-eye sensor 54A that detects the line of sight of the right eye and a sensor 54B for the left eye that detects the line of sight of the left eye.
- the sensors 54A and 54B are provided on the rim of the eyeglass frame 3.
- the place where the signal receiver 53 and the sensor 54 are provided is not limited to the example shown in FIG.
- FIG. 24 is a flowchart for explaining an operation example of the liquid crystal shutter glasses 1.
- the senor 54 detects the direction of the observer's line of sight (step S101), and outputs a detection signal indicating the detected line of sight to the control unit 52 (step S102).
- control unit 52 determines an individual electrode to which the drive unit 51 applies a voltage based on the detection signal (step S103).
- control unit 52 determines a drive region according to the direction of the line of sight indicated by the detection signal (step S103A).
- control unit 52 determines an elliptical or rectangular area centered on the direction of the line of sight as the driving area.
- the size of the drive region may be constant or may be determined according to the direction of the line of sight.
- the control unit 52 decreases the driving area as the direction of the line of sight is farther from the center direction of the face (liquid crystal shutter glasses 1). This indicates that the distance from the observer to the time-division display is larger as the direction of the line of sight is farther from the center direction of the face, and the larger the distance is, the smaller the driving area is, and thus the better image is presented to the observer. This is because it can be provided.
- control unit 52 selects an individual electrode corresponding to the drive region as an individual electrode to which a voltage is applied (step S103B).
- control unit 52 holds in advance correspondence information in which a drive region and an individual electrode are associated with each drive region. In the correspondence information, the control unit 52 determines the individual electrode associated with the selected drive region as the individual electrode to which the voltage is applied.
- control unit 52 determines an individual electrode
- the control unit 52 outputs a control signal indicating the individual electrode to the drive unit 51 (step S104).
- the driving unit 51 When the driving unit 51 receives the control signal, the driving unit 51 sets the individual electrode indicated by the control signal as an individual electrode to which a voltage is applied (step S105). Thereafter, when receiving the synchronization signal, the signal receiver 53 outputs the synchronization signal to the driving unit 51 via the control unit 52. When receiving the synchronization signal, the drive unit 51 switches between applying and stopping application of the voltage to the set individual electrode in synchronization with the timing indicated by the synchronization signal (step S106). Thereby, the transmission state and shielding state of the drive region are switched.
- the sensor 54 detects the observer's line of sight.
- the control unit 52 adjusts at least one of the size and position of the drive region according to the line of sight detected by the sensor 54.
- the time division display 55 measures the relative position between the liquid crystal shutter glasses 1 and the time division display 55.
- the time division display 55 is used as an example of a display device.
- FIG. 25 is an explanatory diagram for explaining the measurement of the relative position by the time-division display 55.
- FIG. 25 shows a state in which the observer 60 observes the time-division display 55 using the liquid crystal shutter glasses 1.
- the time division display 55 has a position sensor 55A.
- the position sensors 55A are provided on both sides of the display screen 55B of the time division display 55, and detect the distance from the provided position to the liquid crystal shutter glasses 1.
- the time division display 55 measures the relative position between the liquid crystal shutter glasses 1 and the time division display 55 based on the detected distance.
- the relative position includes the distance from the time-division display 55 to the liquid crystal shutter glasses 1.
- the relative position may include an angle between the time-division display 55 and the liquid crystal shutter glasses 1.
- the distance from the time-division display 55 to the liquid crystal shutter glasses 1 is specifically the distance from the display screen 55B of the time-division display 55 to the liquid crystal shutter glasses 1.
- the angle between the time division display 55 and the liquid crystal shutter glasses 1 specifically includes a line perpendicular to the display screen 55B of the time division display 55 and the center point 55C of the display screen 55B of the time division display 55. And an angle ⁇ formed by a line connecting the liquid crystal shutter glasses 1.
- the time division display 55 when measuring the relative position, transmits position information indicating the measurement position to the signal receiver 53 of the liquid crystal shutter glasses 1.
- the signal receiver 53 receives position information from the time division display 55 in addition to the synchronization signal.
- the signal receiver 53 serves as both receiving means and receiving means.
- the control unit 52 adjusts at least one of the size and position of the drive region based on the position information received by the signal receiver 53 and the line of sight detected by the sensor 54.
- FIG. 26 is a flowchart for explaining the operation of the liquid crystal shutter glasses 1 of this embodiment.
- the senor 54 detects the direction of the line of sight of the observer, and outputs a detection signal indicating the detected direction of the line of sight to the control unit 52 (step S201).
- the time division display 55 measures the relative position between the time division display 55 and the liquid crystal shutter glasses 1 using the position sensor 55A, and outputs position information indicating the relative position (step S202).
- control unit 52 Upon receiving the position information, the signal receiver 53 outputs the position information to the control unit 52 (step S203).
- control unit 52 determines the drive region based on the detection signal and the position information.
- control unit 52 determines an elliptical or rectangular area centered on the direction of the line of sight as the driving area. Moreover, the control part 52 makes a drive area
- control unit 52 specifies whether the observer exists in the left-right direction of the display screen 55B of the time-division display 55 based on the angle indicated by the position information.
- the control unit 52 shifts the stop of the drive region in the direction opposite to the direction in which the observer exists.
- control part 52 makes a drive area
- control unit 52 determines an individual electrode to which a voltage is applied according to the drive region, and outputs a control signal indicating the individual electrode (step S204).
- control unit 52 outputs a control signal, steps S105 and S106 are thereafter executed.
- the signal receiver 53 receives position information indicating a relative position between the liquid crystal shutter glasses 1 and the time-division display 55.
- the control unit 52 adjusts at least one of the size and the position of the drive region according to the position information received by the signal receiver 53.
- liquid crystal shutter 2 is detachable from the eyeglass frame 3.
- FIG. 27 is a side view showing the detachable liquid crystal shutter 2.
- a vision correction lens 71 is attached to the lens portion of the eyeglass frame 3, and the eyeglass frame 3 and the vision correction lens 71 constitute a vision correction eyeglass 72.
- the liquid crystal shutter 2 is attached in front of the vision correction lens 71.
- a stopper 73 for detachably fixing the liquid crystal shutter 2 is used, and the liquid crystal shutter 2 is attached in front of the vision correction lens 71.
- the liquid crystal shutter eyeglass 1 can be used also for glasses for other purposes such as eyeglasses for visual correction.
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Abstract
Description
上記の立体画像表示装置では、液晶層によってカラー受像管からの表示光の偏光の向きが切り替えられることによって、偏光めがねによる表示光の透過と遮蔽とを切り替えることが可能になる。この立体画像表示装置でも、特許文献2に記載の立体画像認識装置と同様に、周囲光が液晶シャッターめがねで遮蔽されないので、周囲光によるちらつきを低減することが可能になる。
制御部52は、検知信号および位置情報を受け付けると、その検知信号および位置情報に基づいて、駆動領域を決定する。
Claims (13)
- 光を透過する透過状態と、光を遮蔽する遮蔽状態と、を切り替えることが可能な透過遮蔽領域を有する液晶シャッターと、
前記透過遮蔽領域の少なくとも一部の領域である駆動領域の前記透過状態と前記遮蔽状態とを切り替える駆動手段と、
前記駆動領域の大きさおよび位置の少なくとも一方を調整する制御手段と、を含む液晶シャッターめがね。 - 請求項1に記載の液晶シャッターめがねにおいて、
前記透過状態と前記遮蔽状態とを切り替えるタイミングを示す同期信号を受信する受信手段をさらに含み、
前記駆動手段は、前記受信手段が受信した同期信号に応じて、前記透過状態と前記遮蔽状態とを切り替える、液晶シャッターめがね。 - 請求項1または2に記載の液晶シャッターめがねにおいて、
前記液晶シャッターは、
一対の透明基板と、
各透明基板上に形成された一対の電極と、
前記電極間に封入された液晶層と、
前記透明基板を挟む一対の偏光層と、を有し、
前記一対の電極の少なくとも一方は、複数の個別電極に分割された分割電極であり、
前記駆動手段は、前記個別電極に電圧を印加して、前記駆動領域の前記透過状態と前記遮蔽状態とを切り替え、
前記制御手段は、前記駆動手段が電圧を印加する個別電極を選択することで、前記駆動領域の大きさおよび位置の少なくとも一方を調整する、液晶シャッターめがね。 - 請求項3に記載の液晶シャッターめがねにおいて、
前記分割電極は、前記個別電極として、中心電極と、前記中心電極を囲む外周電極とを有する、液晶シャッターめがね。 - 請求項4に記載の液晶シャッターめがねにおいて、
前記中心電極は、長軸方向が前記液晶シャッターめがねの左右方向と平行な楕円形状である、液晶シャッターめがね。 - 請求項4に記載の液晶シャッターめがねにおいて、
前記中心電極は、長手方向が前記液晶シャッターめがねの左右方向と平行な長方形状である、液晶シャッターめがね。 - 請求項4ないし6のいずれか1項に記載の液晶シャッターめがねにおいて、
前記液晶シャッターは、2つあり、各液晶シャッターは、前記液晶シャッターめがねの左右方向に並設され、
各液晶シャッターが有する中心電極の中心点は、前記左右方向における当該液晶シャッターの中心線と、他の液晶シャッターとの間にある、液晶シャッターめがね。 - 請求項4に記載の液晶シャッターめがねにおいて、
前記一対の電極の両方が前記分割電極であり、各電極が前記個別電極として複数のライン電極を有し、
前記一対の電極の一方に含まれるライン電極のそれぞれと、前記電極の他方に含まれるライン電極のそれぞれとが互いに交差している、液晶シャッターめがね。 - 請求項4に記載の液晶シャッターめがねにおいて、
前記個別電極は、格子状に配置されている、液晶シャッターめがね。 - 請求項1ないし9のいずれか1項に記載の液晶シャッターめがねにおいて、
観察者の視線を検知する検知手段をさらに有し、
前記制御手段は、前記検知手段にて検知された視線に応じて、前記駆動領域の大きさおよび位置の少なくも一方を調整する、液晶シャッターめがね。 - 請求項1ないし9のいずれか1項に記載の液晶シャッターめがねにおいて、
前記液晶シャッターめがねと予め定められた表示装置との相対位置を示す位置情報を受信する受付手段をさらに有し、
前記制御手段は、前記受付手段が受信した位置情報に応じて、前記駆動領域の大きさおよび位置の少なくとも一方を調整する、液晶シャッターめがね。 - 請求項10に記載の液晶シャッターめがねにおいて、
前記液晶シャッターめがねと予め定められた表示装置との相対位置を示す位置情報を受信する受付手段をさらに有し、
前記制御手段は、前記受付手段が受信した位置情報および前記視線に応じて、前記駆動領域の大きさおよび位置の少なくとも一方を調整する、液晶シャッターめがね。 - 請求項1ないし12のいずれか1項に記載の液晶シャッターめがねにおいて、
前記液晶シャッターは、めがねフレームと着脱可能である、液晶シャッターめがね。
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US13/378,884 US9436016B2 (en) | 2009-06-19 | 2010-04-28 | Liquid crystal shutter eyeglass |
JP2011519678A JP5418591B2 (ja) | 2009-06-19 | 2010-04-28 | 液晶シャッターめがね |
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EP2381291A1 (en) * | 2010-04-22 | 2011-10-26 | Korea O.G.K CO. LTD. | Vision correction lens assembly for viewing three-dimensional (3D) images |
JP2012212954A (ja) * | 2011-03-30 | 2012-11-01 | Casio Comput Co Ltd | 映像提示システムおよび映像提示方法 |
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US9436016B2 (en) | 2016-09-06 |
JPWO2010146943A1 (ja) | 2012-12-06 |
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US20120092572A1 (en) | 2012-04-19 |
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