WO2012128581A2 - Dispositif d'affichage d'image stéréoscopique - Google Patents

Dispositif d'affichage d'image stéréoscopique Download PDF

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Publication number
WO2012128581A2
WO2012128581A2 PCT/KR2012/002095 KR2012002095W WO2012128581A2 WO 2012128581 A2 WO2012128581 A2 WO 2012128581A2 KR 2012002095 W KR2012002095 W KR 2012002095W WO 2012128581 A2 WO2012128581 A2 WO 2012128581A2
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Prior art keywords
layer
phase difference
retardation layer
region
wavelength dispersion
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PCT/KR2012/002095
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English (en)
Korean (ko)
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WO2012128581A3 (fr
Inventor
전병건
박문수
김신영
유수영
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LG Chem Ltd
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LG Chem Ltd
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Priority claimed from KR1020120028928A external-priority patent/KR101556817B1/ko
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to JP2014501010A priority Critical patent/JP5765604B2/ja
Priority to CN201280014764.5A priority patent/CN103518155B/zh
Publication of WO2012128581A2 publication Critical patent/WO2012128581A2/fr
Publication of WO2012128581A3 publication Critical patent/WO2012128581A3/fr
Priority to US14/031,727 priority patent/US9279994B2/en
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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
    • G02B30/25—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 using polarisation techniques

Definitions

  • the present application relates to a stereoscopic image display device and polarizing glasses.
  • a stereoscopic image display device is a display device capable of delivering three-dimensional information to an observer.
  • the method of displaying a stereoscopic image can be largely divided into a glasses method and a glasses-free method.
  • the glasses may be classified into polarized glasses and LC shutter glasses.
  • the glasses may be classified into a binocular / multi-view binocular parallax, a volumetric method, or a holographic method. .
  • the present application provides a stereoscopic image display device and polarizing glasses.
  • An exemplary stereoscopic image display device (hereinafter, referred to as “3D device”) of the present application may be a device that wears polarized glasses and observes a stereoscopic image.
  • the 3D device may include the polarizing glasses together with a display unit and a filter unit to be described later.
  • the polarizing glasses may include a right eye region (hereinafter referred to as "GR region”) and a left eye region (hereinafter referred to as "GL region”).
  • the right eye area may mean an area located on the observer's right eye when the observer wears polarized glasses
  • the left eye area may mean an area located on the observer's left eye when the observer wears polarized glasses.
  • the 3D device may include a display unit and a filter unit.
  • the 3D device may further include a polarizing plate present between the display portion and the filter portion.
  • the 3D device includes the display unit, the polarizing plate, and the filter such that an image signal generated in the display unit in the driving state is transmitted to the filter unit through the polarizing plate and then transmitted through the filter unit to an observer wearing polarizing glasses. We can include wealth sequentially.
  • driving state means a state in which a 3D apparatus displays a stereoscopic image to an observer unless otherwise specified.
  • FIG. 1 is a view showing a state of observing an exemplary 3D device from above.
  • an arrow may mean a direction in which an image signal travels in a driving state, and the observer 106 may wear a polarized glasses and observe a stereoscopic image, for example.
  • the apparatus 10 of FIG. 1 includes a display portion 103 and a filter portion 105, and a polarizing plate 104 is positioned between the display portion 103 and the filter portion 104.
  • the 3D device 10 may further include a polarizing plate 102 and a light source 101 sequentially disposed on the opposite side to the polarizing plate 104 of the display unit 103.
  • the polarizing plate 104 positioned between the display unit 103 and the filter unit 105 is referred to as a first polarizing plate
  • the polarizing plate 102 positioned on the opposite side of the first polarizing plate is It is called a 2nd polarizing plate.
  • the 1st and 2nd polarizing plates 102 and 104 contained in the 3D apparatus 10 are optical elements in which the transmission axis and the absorption axis orthogonal to the said transmission axis are formed.
  • the polarizer may transmit only light having a polarization axis parallel to the transmission axis direction of the incident light.
  • the absorption axis of the first polarizing plate 104 and the absorption axis of the second polarizing plate 102 included in the 3D device 10 may be perpendicular to each other.
  • the transmission axes of the first and second polarizing plates 102 and 104 may also be perpendicular to each other.
  • angles such as “vertical”, “horizontal”, “orthogonal”, or “parallel” mean substantially vertical, horizontal, orthogonal, or parallel within a range that does not impair the desired effect, respectively. Accordingly, the above terms are, for example, taking into account a manufacturing error or variation, for example, an error within about ⁇ 15 degrees, an error within about ⁇ 10 degrees or about ⁇ 5 degrees I can include the error within
  • the light source 101 for example, a direct type or edge type backlight unit (BLU) back light unit (BLU) commonly used in liquid crystal displays (LCDs) may be used.
  • BLU edge type backlight unit
  • LCDs liquid crystal displays
  • various kinds of light sources 101 may be used without limitation.
  • the display unit of the 3D device may generate a video signal including a video signal, for example, a right eye signal (hereinafter referred to as an "R signal”) and a left eye signal (hereinafter referred to as an "L signal”) in a driving state.
  • the display unit includes a right eye signal generation region capable of generating an R signal in a driving state (hereinafter referred to as an "RS region”) and a left eye signal generation region capable of generating an L signal (hereinafter referred to as an "LS region"). ) May be included.
  • the display unit may be, for example, an area including a transmissive liquid crystal panel or an area formed by a liquid crystal layer of the liquid crystal panel.
  • the transmissive liquid crystal panel may include, for example, a first substrate, a pixel electrode, a first alignment layer, a liquid crystal layer, a second alignment layer, a common electrode, and a second substrate sequentially from the light source 101 side.
  • an active driving circuit including a TFT (Thin Film Transistor), wiring, or the like may be formed as a driving element electrically connected to the transparent pixel electrode.
  • the pixel electrode may include, for example, indium tin oxide (ITO) or the like, and may function as an electrode for each pixel.
  • a 1st or 2nd alignment film can contain materials, such as a polyimide, for example.
  • the liquid crystal layer may include, for example, liquid crystal in a vertical alignment (VA), twisted nematic (TN), super twisted nematic (STN), or in LCane switching (IPS) mode.
  • VA vertical alignment
  • TN twisted nematic
  • STN super twisted nematic
  • IPS LCane switching
  • the liquid crystal layer may have a function of transmitting or blocking light from the light source 101 for each pixel by a voltage applied from the driving circuit.
  • the common electrode includes, for example, ITO and can function as a common counter electrode.
  • the display unit 103 may be an area capable of generating an R or L signal in a driving state and may include an RS and an LS area formed by one or more pixels.
  • a unit pixel or two or more unit pixels including a liquid crystal sealed between the first and second alignment layers may be combined to form the RS or LS region.
  • the RS and LS regions may be arranged in the row and / or column direction.
  • 2 is a diagram illustrating an arrangement of exemplary RS and LS regions. As illustrated in FIG. 2, the RS and LS regions have a stripe shape extending in a common direction and may be alternately disposed adjacent to each other.
  • 3 shows another exemplary arrangement in which RS and LS regions are alternately arranged adjacent to each other in a lattice pattern.
  • the arrangement of the RS and LS regions is not limited to the arrangement of FIGS. 2 and 3, and various designs known in the art may all be applied.
  • the display unit may generate an image signal including the R and L signals by driving the pixels of each region according to the signal in the driving state.
  • the transmitted light may enter the display unit 103, and the light transmitted through the RS region may be an R signal, and the light transmitted through the LS region may be an L signal.
  • the R and L signals are incident on the first polarizing plate 104, only a signal polarized in parallel with the transmission axis of the polarizing plate 104 may pass through the polarizing plate 104 and enter the filter unit 105.
  • the filter unit 105 may include a first region and a second region that are formed to divide the image signal generated by the display unit 103 into two or more signals having different polarization states in the driving state.
  • any one of the first and second areas is a signal polarization control area (hereinafter, referred to as an "RC area") for the right eye which is arranged to allow the R signal to be incident from the signal transmitted from the display unit 103
  • the other region may be a left-eye signal polarization adjusting region (hereinafter, referred to as an “LC region”) in which an L signal may be incident.
  • the first region and the RC region may be used as the same meaning
  • the second region may be used as the same meaning as the LC region.
  • the RC and / or LC region may comprise a retardation layer.
  • the LC region may include a retardation layer in which an optical axis is formed in a first direction
  • the RC region may include a retardation layer in which an optical axis is formed in a second direction different from the first direction.
  • optical axis may mean a slow axis or a fast axis, for example, a slow axis in the process of passing light through a corresponding area.
  • the RC region of the filter unit 105 may be disposed in a size corresponding to the RS region at a corresponding position of the RS region so that an R signal generated and transmitted in the RS region may be incident in a driving state.
  • the L signal generated and transmitted in the LS region may be disposed in a size corresponding to the LS region at a corresponding position of the LS region.
  • the RC or LC region is formed to have a size corresponding to the position corresponding to the RS or LS region, so that the R signal generated in the RS region may be incident to the RC region, and the L signal generated in the LS region is incident to the LC region. It means the position and size that can be, and does not necessarily mean that both must be formed in the same position in the same size.
  • the RC and LC regions are formed in a stripe shape extending in the common direction corresponding to the arrangement of the RS and LS regions of the display portion, and are alternately arranged adjacent to each other, or alternately adjacent to each other in a grid pattern. It may be arranged as.
  • the RC and LC regions may be arranged as shown in FIG. 4, and when the RS and LS regions are arranged as shown in FIG.
  • LC region may be arranged in the form as shown in FIG.
  • the signal transmitted through the RC region and the signal transmitted through the LC region may have different polarization states.
  • any one of a signal transmitted through the RC region and a signal transmitted through the LC region may be a left circularly polarized signal and the other may be a right circularly polarized signal.
  • the R signal generated in the display unit enters the RC region through the first polarizing plate, it is emitted in a left circle polarization or right polarized state, and after the L signal enters the LC region via the first polarizing plate, The R signal may be emitted in a right circular polarization or left circular polarization state such that the rotation direction of the polarization axis is reversed.
  • the phase difference layers included in the RC and LC regions are a ⁇ / 4 wavelength layer.
  • the optical axes of the ⁇ / 4 wavelength layers disposed in the RC region and the ⁇ / 4 wavelength layers disposed in the LC region may be different from each other.
  • the RC region includes a lambda / 4 wavelength layer having an optical axis in a first direction as the phase difference layer
  • the LC region has a lambda / having an optical axis in a second direction different from the first direction as the phase difference layer. It may include four wavelength layers.
  • the term "n ⁇ wavelength layer” may refer to a phase delay element capable of delaying an incident light by n times the wavelength of each wavelength, where n is, for example, 1/4 , 1/2 or 3/4.
  • any one of the RC and LC regions of the filter portion may include a 3 ⁇ / 4 wavelength layer, and the other region may generate left and right polarized light.
  • the 3 ⁇ / 4 wavelength layer can be produced by laminating a? / 2 wavelength layer and a? / 4 wavelength layer, for example.
  • FIG. 6 is a schematic diagram for demonstrating the optical-axis direction of RC and LC area
  • FIG. 6 the optical axis formed in the first region in the LC region is denoted by A1, and the optical axis formed in the second region in the RC region is denoted by A2.
  • the optical axes A1 and A2 of the RC and LC regions may be formed such that a line bisecting the angle formed by the optical axes A1 and A2 is parallel or perpendicular to the absorption axis of the first polarizing plate.
  • the signal generated in the display unit and transmitted through the polarizing plate may be accurately converted to left circle polarization and right circle polarization. Accordingly, it is possible to realize excellent stereoscopic image quality and to prevent so-called crosstalk phenomenon which is a problem when observing stereoscopic images.
  • linear dividing the angle formed by the optical axis can refer to a line dividing the angle of " ⁇ 1 + ⁇ 2" or "360- ( ⁇ 1 + ⁇ 2)" with reference to FIG.
  • the bisector may be formed in a direction parallel to the boundary line L of the RC and LC regions.
  • the optical axes A1 and A2 in the RC and LC regions may also be perpendicular to each other.
  • Such a state may mean, for example, a case where an angle of " ⁇ 1 + ⁇ 2" or "360- ( ⁇ 1 + ⁇ 2)" in FIG. 6 is substantially 90 degrees.
  • the stereoscopic image may be observed.
  • the polarizing glasses include a GL region and a GR region.
  • the GL region may include a retardation layer and a polarizer
  • the GR region may also include a retardation layer and a polarizer.
  • 7 is a diagram illustrating the polarizing glasses 70 by way of example. As illustrated in FIG. 7, the polarizing glasses 70 may include GL and GR regions including retardation layers 701L and 701R and polarizers 702L and 702R, respectively. In FIG. 7, an arrow indicates a moving direction of an R or L signal.
  • the polarizer included in the polarizing glasses may be an optical element having a transmission axis in a direction perpendicular to the direction of the absorption axis and the absorption axis formed in a predetermined direction, such as a polarizing plate included in the 3D device.
  • the polarizer may be disposed in each region such that the absorption axis of the polarizer included in the GR region of the polarizing glasses and the absorption axis of the polarizer included in the GL region are parallel to each other.
  • the absorption axes of the polarizers formed in parallel with each other may include a virtual line connecting the center of the GL region and the center of the GR region to the RC region of the 3D device, for example, the first region and the LC region, for example.
  • the glasses are disposed to be perpendicular to the absorption axis of the first polarizing plate while the glasses are positioned to be perpendicular or horizontal to the boundary line of the second region. In this state, high quality stereoscopic images can be observed.
  • an imaginary line connecting the centers of the GL and GR regions of the glasses is, for example, an imaginary line connecting the center C of the GR and GL regions GR and GL, as shown in FIG. 8. (CL), and the center of the region may mean a center of gravity.
  • the GR and GL regions of the polarizing glasses may each include a retardation layer.
  • the retardation layers included in the GR and GL regions of the polarizing glasses may satisfy the retardation layers included in the RC and LC regions of the filter unit and the following general formulas (1) and (2), respectively.
  • D L is a relative deviation of the optical axis of the retardation layer in the LC region and the optical axis of the retardation layer in the GL region
  • ⁇ 2 is the absorption axis of the retardation layer in the LC region.
  • ⁇ L is an angle formed by the optical axis of the retardation layer of the GL region and the absorption axis of the first polarizing plate in a state where the absorption axis of the polarizer of the GL region is disposed perpendicular to the absorption axis of the first polarizing plate
  • D R is the relative deviation degree between the optical axis of the retardation layer in the RC region and the optical axis of the retardation layer in the GR region
  • ⁇ 1 is an angle at which the optical axis of the retardation layer in the RC region forms with the absorption axis of the first polarizing plate
  • ⁇ R is , The angle between the optical axis of the phase difference layer of the GR region and the absorption axis of the first polarizing plate in a state where the absorption axis of the polarizer of the GR region is disposed perpendicular to the absorption axis of the first polarizing plate.
  • angles of ⁇ 1 , ⁇ 2 , ⁇ R, and ⁇ L may be angles measured clockwise or counterclockwise from the absorption axis of the first polarizing plate, but the angles substituted into the same equation may be The angle is measured in the same direction.
  • FIG. 9 is a diagram schematically illustrating the angular relationship between D L of the general formula 1 and in a state in which the absorption axis A D of the first polarizing plate and the absorption axis A G of the polarizer of the GL region are vertically disposed.
  • the angle of the optical axis S F of the retardation layer of the LC region measured clockwise from the absorption axis A D of the first polarizing plate is represented by ⁇ 2
  • measured GL clockwise from the absorption axis A D The angle of the optical axis S G of the retardation layer of the region is indicated by ⁇ L.
  • FIG. 10 is a view showing the angular relationship of the D R of the general formula 2, and Fig.
  • the angle of the optical axis S F of the phase difference layer of the RC region measured counterclockwise from the absorption axis A D of the first polarizing plate is represented by ⁇ 1 , and is counterclockwise from the absorption axis A D.
  • the angle of the optical axis S G of the retardation layer in the GR region measured by is represented by ⁇ R.
  • D L is 14 degrees or less, 13 degrees or less, 12 degrees or less, 11 degrees or less, 10 degrees or less, 9 degrees or less, 8 degrees or less, 7 degrees or less, 6 degrees or less, or 5 degrees, for example. It may be: In General Formula 2, D R is, for example, 14 degrees or less, 13 degrees or less, 12 degrees or less, 11 degrees or less, 10 degrees or less, 9 degrees or less, 8 degrees or less, 7 degrees or less, 6 degrees or less, or 5 degrees or less.
  • the quality of the stereoscopic image can be improved.
  • the 3D device may have a crosstalk ratio of 6% or less, 5% or less, 4% or less, 3% or less, 2% or less, 1% or less when the image is worn while wearing the polarized glasses. It may be less than or equal to%.
  • the term crosstalk ratio CT is a ratio of the luminance L B of the dark state to the luminance L W of the bright state when the stereoscopic image emitted from the 3D device is observed while wearing the polarizing glasses. It means a percentage of, and can be calculated according to the following formula (1).
  • the term "light state” means a state in which an image signal emitted from a 3D device passes through polarized glasses
  • the term “dark state” means a state in which an image signal emitted from a 3D device is blocked by polarized glasses. It may mean.
  • the GR region of the polarizing glasses is configured to transmit the R signal emitted from the 3D device and to block the L signal, and the GL region to block the R signal emitted from the 3D device and transmit the L signal.
  • the brightness L W in the bright state may be a luminance after the R signal emitted from the 3D device passes through the GR region, or may be a luminance after the L signal passes through the GL region.
  • the luminance L B of the dark state may be a luminance after the R signal emitted from the 3D device passes through the GL region, or may be a luminance after the L signal passes through the GR region.
  • the 3D device also wears polarized glasses and observes stereoscopic images, such as the International Commission on Illumination (CIE) of a bright state signal, for example, an R signal transmitted through a GR region or an L signal transmitted through a GL region.
  • CIE International Commission on Illumination
  • the X value in the tristimulus value in the color space may be 0.322 to 0.344, and the Y value may be 0.316 to 0.350.
  • the lower limit of the X value may be, for example, 0.323, 0.325, 0.326, or 0.327, and the upper limit may be 0.341, 0.339, 0.337, or 0.335, and the lower limit of the Y value may be, for example, 0.326, 0.329, or 0.331.
  • the upper limit may be 0.340, 0.338, 0.337, 0.336, 0.335 or 0.334.
  • the range of the X value and the Y value may be a range in which any number of the upper limit and / or the lower limit is selected and combined.
  • the 3D device also wears polarized glasses and observes a stereoscopic image, the trichromatic stimulus in the CIE color space of a signal in the dark state, for example, an L signal transmitted through the GR region or an R signal transmitted through the GL region.
  • the X value in the value may be 0.223 to 0.443, and the Y value may be 0.078 to 0.589.
  • the lower limit of the X value may be, for example, 0.230, 0.250, 0.270, 0.290, 0.312, 0.322, or 0.331
  • the upper limit may be 0.436, 0.400, 0.375, or 0.355
  • the lower limit of the Y value may be, for example, 0.130, 0.235, 0.255, 0.275, 0.295, 0.315, 0.325 or 0.331
  • the upper limit may be 0.537, 0.432, 0.400, 0.355, 0.345 or 0.335.
  • the range of the X value and the Y value may be a range in which any value among the upper limit and / or the lower limit is selected and combined.
  • the phase difference value of the retardation layer of the filter unit and / or the polarizing glasses and / or the optical axis of each retardation layer You can use this method to control the relationship between The adjustment of the crosstalk ratio of the 3D device or the polarizing glasses and the trichromatic stimulus value of the CIE color space may also be performed by adjusting the wavelength dispersion property of the filter unit and the phase difference layer of the polarizing glasses.
  • the phase difference layer of the filter unit and the polarizing glasses may be a normal wavelength dispersion characteristic (hereinafter referred to as "N characteristic”), a flat wavelength dispersion characteristic (hereinafter referred to as "F characteristic”), or reverse. )
  • N characteristic normal wavelength dispersion characteristic
  • F characteristic flat wavelength dispersion characteristic
  • R characteristic A retardation layer having wavelength dispersion characteristics
  • R ( ⁇ ) used in the process of explaining the wavelength dispersion characteristic of the retardation layer may mean a retardation value of the retardation layer measured for light having a wavelength of ⁇ nm.
  • R (450), R (550) and R (650) may mean a phase difference value measured for light having a wavelength of 450 nm, 550 nm and 650 nm, respectively.
  • the phase difference value may be, for example, a plane direction phase difference RIN calculated by Equation 2 below, or a thickness direction phase difference RTH calculated by Equation 3 below, for example, calculated by Equation 2 below. It may be a plane direction phase difference.
  • RIN and RTH are in-plane retardation and thickness retardation of the retardation layer
  • X is a refractive index in the in-plane slow axis direction of the retardation layer
  • Y is in-plane fast axis direction of the retardation layer.
  • Z is a refractive index in the thickness direction of the retardation layer
  • D is a thickness of the retardation layer.
  • N-phase retardation layer may refer to a retardation layer in which R (450) / R (550) is larger than R (650) / R (550) unless otherwise specified.
  • the phase difference layer of the N characteristic, R (450) / R (550) is 1.01 to 1.19, 1.02 to 1.18, 1.03 to 1.17, 1.04 to 1.16, 1.05 to 1.15, 1.06 to 1.14, 1.07 to 1.13, 1.08-1.12 or 1.09-1.11.
  • phase difference layer of the N characteristics, R (650) / R (550) is 0.81 to 0.99, 0.82 to 0.98, 0.83 to 0.97, 0.84 to 0.96, 0.85 to 0.95, 0.86 to 0.94, 0.87 to 0.93, 0.88 to 0.92 or 0.89 to 0.91.
  • ⁇ R (650) -R (450) ⁇ / ⁇ 200 ⁇ R (550) ⁇ is -0.0019 to -0.0001, -0.0018 to -0.0002, -0.0017 to -0.0003,- 0.0016 to -0.0004, -0.0015 to -0.0005, -0.0014 to -0.0006, -0.0013 to -0.0007, -0.0012 to -0.0008, -0.0011 to -0.0009 or about -0.001.
  • the term "retardation layer of F characteristics" may mean a phase difference layer in which R (450) / R (550) is substantially the same as R (650) / R (550) unless otherwise specified.
  • the phase difference layer having N characteristics may include R (450) / R (550) and R (650) / R (550) of 1.01 to 1.19, 1.02 to 1.18, 1.03 to 1.17, 1.04 to 1.16, and 1.05, respectively. To 1.15, 1.06 to 1.14, 1.07 to 1.13, 1.08 to 1.12, or 1.09 to 1.11.
  • ⁇ R (650) -R (450) ⁇ / ⁇ 200 ⁇ R (550) ⁇ is within ⁇ 0.0009, within ⁇ 0.0008, within ⁇ 0.0007, within ⁇ 0.0006, and within ⁇ 0.0005. , Within ⁇ 0.0004, within ⁇ 0.0003, within ⁇ 0.0002, within ⁇ 0.0001, or about zero.
  • the term "retardation layer of R characteristics" may refer to a retardation layer in which R (450) / R (550) is smaller than R (650) / R (550) unless otherwise specified.
  • the phase difference layer of the N characteristic, R (450) / R (550) is 0.81 to 0.99, 0.82 to 0.98, 0.83 to 0.97, 0.84 to 0.96, 0.85 to 0.95, 0.86 to 0.94, 0.87 to 0.93, 0.88 to 0.92 or 0.89 to 0.91.
  • R (650) / R (550) is 1.01 to 1.19, 1.02 to 1.18, 1.03 to 1.17, 1.04 to 1.16, 1.05 to 1.15, 1.06 to 1.14, 1.07 to 1.13, 1.08 to 1.12 Or 1.09 to 1.11.
  • the phase difference layer of the N characteristics, ⁇ R (650) -R (450) ⁇ / ⁇ 200 ⁇ R (550) ⁇ is 0.0001 to 0.0019, 0.0002 to 0.0018, 0.0003 to 0.0017, 0.0004 to 0.0016, 0.0005 to 0.0015 , 0.0006 to 0.0014, 0.0007 to 0.0013, 0.0008 to 0.0012, 0.0009 to 0.0011, or about 0.001.
  • the retardation layer of the filter portion and the retardation layer of the polarizing glasses for example, the retardation layer of the RC region and the retardation layer of the GR region and / or the retardation layer of the LC region and the retardation layer of the GL region are the same wavelength. It may have a dispersing characteristic.
  • the retardation layers having the same wavelength dispersion characteristics as described above may satisfy Equation 4 below.
  • R 1 ( ⁇ ) is a phase difference value of the phase difference layer of the filter portion measured for light having a wavelength of ⁇ nm
  • R 2 ( ⁇ ) is the polarized light measured for light having a wavelength of ⁇ nm. It is a phase difference value of the phase difference layer of glasses.
  • the lower limit of “R 2 ( ⁇ ) —R 1 ( ⁇ )” may be -15 nm, -10 nm, or -5 nm. In one example, the upper limit of “R 2 ( ⁇ ) —R 1 ( ⁇ )” may be 15 nm, 10 nm, or 5 nm.
  • phase difference layer having the wavelength dispersion characteristic satisfying the above in the filter unit and the polarizing glasses, respectively, it is possible to maintain the crosstalk ratio and the trichromatic stimulus value of the stereoscopic image in an appropriate range, and thus Observation is possible.
  • the retardation layer having N, R or F characteristics can be used as the retardation layer, and in one example, the retardation layer having R characteristics can be used.
  • the retardation layer of the filter unit and the retardation layer of the polarizing glasses for example, the retardation layer of the RS region and the retardation layer of the GR region and / or the retardation layer of the LS region and the retardation layer of the GL region are different from each other.
  • Can have characteristics.
  • the retardation layers having wavelength dispersion characteristics different from each other may satisfy Equation 5 below.
  • R 1 ( ⁇ ) is a phase difference value of the retardation layer of the filter portion measured for light having a wavelength of ⁇ nm
  • R 2 ( ⁇ ) is a value of the polarized glasses measured for light having a wavelength of ⁇ nm. Retardation value of the retardation layer.
  • the lower limit of the "R 2 ( ⁇ ) -R 1 ( ⁇ )" may be -35 nm, -30 nm, -25 nm, -20 nm, -15 nm, -10 nm, or -5 nm.
  • the upper limit of “R 2 ( ⁇ ) —R 1 ( ⁇ )” may be 35 nm, 30 nm, 25 nm, 20 nm, 15 nm, 10 nm, or 5 nm.
  • phase difference layer having the wavelength dispersion characteristic satisfying the above in the filter unit and the polarizing glasses, respectively, it is possible to maintain the crosstalk ratio and the trichromatic stimulus value of the stereoscopic image in an appropriate range, and thus Observation is possible.
  • the phase difference layer of the filter portion and the polarizing glasses have different wavelength dispersion characteristics
  • the phase difference layer of the F characteristic when used, the phase difference layer of the F characteristic may be used as the phase difference layer of the polarizing glasses.
  • the retardation layer of the polarizing glasses can use a retardation layer of R or F characteristics, and the retardation layer of the filter portion is a retardation layer of R characteristics, As the retardation layer of the polarizing glasses, a retardation layer having N or F characteristics can be used.
  • retardation layer having N, R or F characteristics various materials known in the art can be used without limitation as long as the properties required in each case are satisfied.
  • the phase difference layer may be a liquid crystal layer obtained by polymerizing a polymerizable liquid crystal compound, a polymer film to which phase difference is imparted by a process such as uniaxial or biaxial stretching, or a laminated film of the liquid crystal layer and the polymer film. Can be used.
  • the liquid crystal layer may include, for example, a polymerizable liquid crystal compound polymerized in a state oriented by an adjacent alignment layer.
  • the liquid crystal layer may be formed by forming an alignment layer on a suitable substrate, coating the liquid crystal composition containing a polymerizable liquid crystal compound on the alignment layer, and then aligning and polymerizing the same.
  • the substrate an isotropic substrate having no phase difference may be used, or a substrate having an appropriate phase difference may be used, if necessary, in order to realize appropriate wavelength dispersion characteristics.
  • the alignment layer is a conventional alignment layer known in the art, for example, cis-trans isomerization, fries rearrangement or dimerization induced by irradiation of linearly polarized light.
  • the orientation is determined by a dimerization reaction, and a photo-alignment layer capable of inducing an orientation in the adjacent liquid crystal layer by the determined orientation, a polymer layer such as a rubbed polyimide layer, or a plurality of groove regions are patterned.
  • An acrylic curable resin layer etc. can be illustrated.
  • the kind of polymerizable liquid crystal compound coated on the alignment layer is not particularly limited, and for example, a known compound such as RM (Reactive Mesogen) from Merck or LC242 from BASF may be used.
  • examples of the polymer film to which the phase difference is imparted by uniaxial or biaxial stretching are, for example, an acryl film such as PMMA (poly (methyl methacrylate)), a cycloolefin polymer (COP) film such as polynorbornene (PNB), and the like. It may be, but is not limited thereto.
  • the retardation layer may also be formed by stacking two or more polymer films as described above, or by stacking one or more liquid crystal layers and one or more polymer films.
  • the present application also relates to polarizing glasses, for example polarizing glasses for observing stereoscopic images.
  • the polarizing glasses may include, for example, a display unit capable of generating an image signal; And first and second regions capable of dividing the image signal generated by the display into two or more kinds of signals having different polarization states, wherein the first and second regions each include a filter unit having a phase difference layer. If necessary, it may be polarized glasses for observing an image from a 3D device further including a first polarizing plate between the display unit and the filter unit.
  • the 3D device may be the 3D device described in the item of the present specification, and in this case, the description of the 3D device and the polarizing glasses described above may be equally applied to the part of the polarizing glasses. .
  • the polarizing glasses may be polarizing glasses as described in the item of the 3D device. Therefore, the polarizing glasses may include a GR region and a GL region, and the GR and GL regions may include a retardation layer and a polarizer, respectively.
  • the X value and Y value of the three-color stimulus value of the CIE color space of the crosstalk ratio, the bright state and the dark state when the image is worn while wearing the polarizing glasses are observed, the 3D It may have the same range as described in the device.
  • the relationship between the absorption axis of the polarizers in the GR and GL regions of the polarizing glasses and the optical axis of the phase difference layer of the filter portion of the optical axis of the phase difference layer may be set as described in the item of the 3D device.
  • phase difference layer of a polarizing glasses and the phase difference layer of a filter part may have N characteristic, F characteristic, or R characteristic as needed.
  • N characteristic a characteristic that is unique to the phase difference layer of the polarizing glasses and the phase difference layer of the filter unit.
  • R characteristic the specific contents of the N, F, and R characteristics, or the combination of the characteristics in the phase difference layer of the polarizing glasses and the phase difference layer of the filter unit may be equally applicable to the contents described in the 3D apparatus.
  • the 3D device and polarizing glasses of the present application it is possible to observe a stereoscopic image having an excellent crosstalk ratio and excellent color characteristics.
  • FIG. 1 is a diagram illustrating an exemplary stereoscopic image display device.
  • FIGS. 2 and 3 are schematic diagrams showing an exemplary arrangement of the LS region and the RS region.
  • 4 and 5 are schematic diagrams showing an exemplary arrangement of the LC region and the RC region.
  • FIG. 6 is a schematic view for explaining the relationship between the optical axes of the phase difference layers in the LC and RC regions.
  • FIG. 7 and 8 are views showing a schematic form of the glasses for stereoscopic image observation.
  • FIG. 11 is a view showing the characteristics of the retardation layer of N, F or R characteristics used in the embodiment.
  • the retardation value of the retardation layer was measured using Axoscan (manufactured by Axomatrics), a device capable of measuring 16 Muller Matrix. Specifically, 16 muller matrices of the retardation layer were obtained according to the manufacturer's manual by using the above equipment, and the retardation values were extracted through this.
  • the crosstalk ratio of the 3D device can be measured in the following manner.
  • the polarizing glasses are placed at the normal viewing point of the 3D device.
  • the normal observation point is a distance that is 3/2 times the length of the horizontal direction of the 3D device from the center of the 3D device, wherein the glasses are viewed by the observer toward the center of the 3D device.
  • the horizontal length of the 3D device may be a horizontal length based on the observer, for example, a horizontal length of the 3D device, assuming that the viewer observes a stereoscopic image.
  • the luminance meter (equipment name: SR-UL2 Spectrometer) is disposed on the back of the GL and GR regions of the polarizing glasses in a state where the 3D device outputs the L signal, and the luminance in each case is measured.
  • the luminance measured on the back of the GL region is the brightness of the bright state
  • the luminance measured on the back of the GR region is the brightness of the dark state.
  • the crosstalk ratio may be measured in the same manner as described above, and may be measured by obtaining luminance in a light and dark state while the 3D device is outputting an R signal.
  • the luminance measured on the back of the GL region is the luminance in the dark state
  • the luminance measured on the back of the GR region is the luminance in the bright state.
  • the percentage of the ratio [luminance in the dark state / luminance in the dark state]) can be defined as the crosstalk ratio.
  • X and Y values of the CIE color space were measured in the following manner. Position the polarized glasses at the normal viewing point of the 3D device. The normal observation point is the same as the point described when the crosstalk ratio is measured. With the 3D device outputting the L signal in the above arrangement, a luminance meter (equipment name: SR-UL2 Spectrometer) is placed on the back of the GL and GR regions of the polarizing glasses, and the spectrum according to the wavelength of each case is measured. Based on this, the X value and the Y value can be derived.
  • SR-UL2 Spectrometer equipment name: SR-UL2 Spectrometer
  • the X and Y values of the bright state can be measured from the spectrum measured at the back of the GL region, and the X and Y values of the dark state can be measured from the spectrum measured at the back of the GR region.
  • the X value and the Y value can also be obtained by measuring the spectrum in a state where the 3D device outputs an R signal. When the R signal is output, the X and Y values of the dark state are measured from the spectrum measured on the back of the GL region, and the X and Y values of the bright state can be obtained from the spectrum measured on the back of the GR region. .
  • 3D device having a structure as shown in FIG. 1, wherein the RS and LS regions of the display unit 103 are arranged as shown in FIG. 2, and the RC and LC regions of the filter unit 105 are arranged as shown in FIG. 4. (10) was configured.
  • the retardation layer having a slow axis formed in the RC region of the filter part in a direction counterclockwise with the absorption axis of the first polarizing plate 104 is positioned, and in the LC region, the first polarizing plate 104 is positioned.
  • the retardation layer in which the slow axis was formed in the direction of 45 degrees clockwise with the absorption axis of was placed.
  • the absorption axis of the first polarizing plate 104 is horizontal to the longitudinal direction of the device 10, and the absorption axis of the second polarizing plate 102 is perpendicular to the absorption axis of the first polarizing plate 104. It was. As shown in FIG. 7, the crosstalk ratio and the like were evaluated while wearing and observing polarized glasses including the GL and GR regions as shown in FIG. 7.
  • each of the polarizers 702L and 702R is formed in a direction in which absorption axes are parallel to each other, and further includes a virtual line connecting the center of the GL region and the center of the GR region (imaginary line (shown in FIG. 8).
  • the phase difference layer 701L of the GL region is substantially the same as the phase difference layer of the LC region when the polarizing glasses are arranged such that the absorption axis of the polarizer of the polarizing glasses and the absorption axis of the first polarizing plate 104 are perpendicular to each other.
  • the polarizing glasses are arranged such that the absorption axis of the polarizer of the polarizing glasses and the absorption axis of the first polarizing plate 104 are perpendicular to each other.
  • the retardation layer in which the optical axis was formed in substantially the same direction as the retardation layer in the RC region was used.
  • the types of retardation layers in the LC and RC regions and the retardation layers in the GL and GR regions are changed as shown in Table 1, respectively, to measure the crosstalk ratio and the X and Y values in the CIE color space, respectively. The results are shown in Table 2 below.
  • Table 1 Phase difference layer in LC and RC region Retardation Layers in the GL and GR Regions
  • Example 5 ⁇ / 4 Wavelength Layer with F Characteristics ⁇ / 4 wavelength layer with N characteristics
  • Example 1 0.5 0.328 0.3483 0.3333 0.3333
  • Example 2 1.25 0.3244 0.3382 0.4344 0.2367
  • Example 3 3.31 0.325 0.3336 0.3136 0.1315
  • Example 4 0.5 0.3272 0.3362 0.3333 0.3333
  • Example 5 1.25 0.3244 0.3382 0.4344 0.2367
  • Example 6 1.21 0.3278 0.3328 0.2253 0.0795
  • Example 7 0.5 0.3293 0.3314 0.3333 0.3333
  • Example 8 3.31 0.325 0.3336 0.3316 0.1315
  • Example 9 1.21 0.3278 0.3328 0.2253 0.0795

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

La présente invention se rapporte à un dispositif d'affichage d'image stéréoscopique et à des lunettes polarisantes. Selon un dispositif 3D et les lunettes polarisantes de la présente invention, une image stéréoscopique qui présente un meilleur taux de diaphonie et de meilleures propriétés de couleur peut être observée.
PCT/KR2012/002095 2011-03-23 2012-03-23 Dispositif d'affichage d'image stéréoscopique Ceased WO2012128581A2 (fr)

Priority Applications (3)

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JP2014501010A JP5765604B2 (ja) 2011-03-23 2012-03-23 立体表示装置
CN201280014764.5A CN103518155B (zh) 2011-03-23 2012-03-23 立体图像显示装置
US14/031,727 US9279994B2 (en) 2011-03-23 2013-09-19 Stereoscopic image display device

Applications Claiming Priority (4)

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KR20110025994 2011-03-23
KR10-2011-0025994 2011-03-23
KR1020120028928A KR101556817B1 (ko) 2011-03-23 2012-03-21 입체 영상 표시 장치
KR10-2012-0028928 2012-03-21

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CN115480425A (zh) * 2022-09-26 2022-12-16 武汉华星光电技术有限公司 一种显示装置

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JP2001186549A (ja) * 1999-12-27 2001-07-06 Nippon Hoso Kyokai <Nhk> 立体表示クロストーク量測定装置
JP2007206605A (ja) * 2006-02-06 2007-08-16 Nitto Denko Corp 液晶パネルおよび液晶表示装置
US20080239483A1 (en) * 2007-03-30 2008-10-02 Arisawa Mfg. Co., Ltd. Stereoscopic displaying apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115480425A (zh) * 2022-09-26 2022-12-16 武汉华星光电技术有限公司 一种显示装置
CN115480425B (zh) * 2022-09-26 2026-04-24 武汉华星光电技术有限公司 一种显示装置

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