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US20060023143A1 - Liquid crystal display device having thin polarizing film and thin phase retardation film - Google Patents

Liquid crystal display device having thin polarizing film and thin phase retardation film Download PDF

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Publication number
US20060023143A1
US20060023143A1 US11/160,737 US16073705A US2006023143A1 US 20060023143 A1 US20060023143 A1 US 20060023143A1 US 16073705 A US16073705 A US 16073705A US 2006023143 A1 US2006023143 A1 US 2006023143A1
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United States
Prior art keywords
polarizing
disposed
film
polarizing region
region
Prior art date
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Abandoned
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US11/160,737
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English (en)
Inventor
Sung-Jung Lee
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Pavonine Inc
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Pavonine Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pavonine Inc filed Critical Pavonine Inc
Assigned to PAVONINE INC. reassignment PAVONINE INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, SUNG-JUNG
Publication of US20060023143A1 publication Critical patent/US20060023143A1/en
Priority to US12/545,915 priority Critical patent/US7940342B2/en
Priority to US13/073,979 priority patent/US8184216B2/en
Priority to US13/411,466 priority patent/US8269904B2/en
Priority to US13/411,442 priority patent/US8233104B2/en
Abandoned legal-status Critical Current

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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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • 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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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]
    • H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing
    • 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
    • H04N13/356—Image reproducers having separate monoscopic and stereoscopic modes

Definitions

  • the present invention relates to a LCD (Liquid Crystal Display) device having a thin polarizing film and a thin phase retardation film, and in particular to a LCD device having a thin polarizing film and a thin phase retardation film capable of displaying a 2D (dimension) image and a 3D (dimension) image.
  • a LCD Liquid Crystal Display
  • the Korean patent gazette No. 2992-41382 (laid-open date: Jun. 1, 2002) entitled “Liquid crystal shutter for 3D display device” discloses a technique capable of removing Moire interference phenomenon fin a display device that is designed to implement a 3D based on a parallax barrier.
  • the U.S. Pat. No. 6,813,077 of Corning Inc. discloses a technique of fabricating a thin film of a wire grid with an imprint method.
  • the U.S. Pat. Nos. 5,772,905 and 6,900,126 discloses a nano imprint lithography that uses polymer.
  • the U.S. Pat. No. 6,174,394 of Optiva Ltd. Discloses a polarizing nano material (TCF) fabricated by a technique related with a polarizing nano material thin film.
  • TCF polarizing nano material
  • the U.S. Pat. No. 5,91 7 , 562 (issue date: Jun. 29, 999) entitled “Autostereocopic display and spatial light modulator” that is one of the prior art of the present invention discloses an automatic 3D display apparatus capable of improving an image contrast between a left eye and a right eye.
  • FIG. 1 is a view illustrating a conventional 3D display structure
  • FIG. 2 is a cross sectional view of FIG. 1
  • a first polarizing film 3 is installed at a front side of a backlight unit 2
  • a first transparent substrate 4 is disposed at a front surface of the first polarizing film 3
  • a crystal liquid layer 10 filled with a liquid crystal material is disposed between a first transparent substrate 4 and a second transparent substrate 11 .
  • the second polarizing film 12 having an orthogonal 90° polarizing direction with respect to the first polarizing film 3 is installed at a front surface of the crystal liquid layer 10 .
  • a first 1 ⁇ 2 phase retardation film 21 is installed at a front surface of the second polarizing film 3 .
  • the first 1 ⁇ 2 phase retardation film 21 is installed at a front surface of a 2D image panel.
  • a viewing angle is limited, and a viewing distance is limited. Since the 3D viewing angle is generally less than 16°, it is impossible to view 3D images clearly.
  • a polarizing nano material TCF
  • a LCD Liquid Crystal Display
  • a first transparent substrate is disposed at a front surface of a backlight unit
  • a first polarizing region having a polarizing direction angle of 0° or 45° and a second polarizing region having a polarizing direction angle of 90° or 135° are formed on a surface of the first transparent substrate in an orthogonal structure on the same plane
  • a liquid crystal layer is disposed between a first alignment film and a second alignment film
  • a second transparent electrode and a color filter are disposed at a front surface of the second alignment film
  • a LCD device having a thin polarizing film and a tin phase retardation film characterized in that a first polarizing region having a polarizing direction of 0° or 45° and a second polarizing region having a polarizing direction of 90° or 135° formed on a surface of the first transparent substrate are orthogonal from each other and are aligned on the same plane
  • a polarizing film according to the present invention is integrally formed in a first polarizing region and a second polarizing region on a surface of a first transparent substrate of a conventional LCD panel.
  • a liquid crystal layer is disposed between a third polarizing region and a fourth polarizing region integrally formed at a back surface of the second transparent substrate.
  • the first polarizing region and the second polarizing region are alternately formed at a surface of the first transparent substrate, and the third polarizing region and the fourth polarizing region are alternately formed at a back surface of the second transparent substrate, and the polarizing region formed at a portion corresponding to the first transparent substrate and the second transparent substrate are arranged to have different polarizing directions.
  • the first polarizing region has a polarizing direction of 0° or 45°
  • the third polarizing region has a polarizing direction of 90° or 135°.
  • the polarizing direction between the first polarizing region and the third polarizing region has an orthogonal angle of 90°.
  • the polarizing direction between the second polarizing region and the fourth polarizing region has an orthogonal angle of 90°.
  • a third polarizing film is formed of a straight line polarizing film on the whole front surfaces of the backlight unit.
  • a second 1 ⁇ 2 phase retardation film and a transparent unit are aligned at a surface of the first transparent substrate with a certain width and distance.
  • a first insulation layer is disposed.
  • a first transparent electrode and a first alignment film are sequentially aligned at a front surface of the same.
  • a liquid crystal layer, a second alignment film, a second transparent electrode, a color filter and a second insulation layer are sequentially aligned.
  • a transparent substrate integrally formed of a third polarizing region and a fourth polarizing region are aligned at a front surface of the same.
  • a non-reflection coating layer is disposed at a front most surface.
  • a 1 ⁇ 4 phase retardation film is disposed for converting an incident light into a circular polarizing light in the structure of the second embodiment of the present invention.
  • the whole construction is similar with the first embodiment of the present invention.
  • the structure of the polarizing region is aligned in a lattice shape, and a 1 ⁇ 4 phase retardation film is further provided.
  • the whole construction is similar with the third embodiment of the present invention.
  • the structure of the phase retardation film and the structure of the polarizing region are aligned in a lattice shape.
  • the polarizing region is formed of a conductive metal differently from the structure of the fourth embodiment of the present invention.
  • the polarizing film function and the electrode function are concurrently provided, two transparent electrodes and two insulation layers are not needed before and after the liquid crystal layer differently from the fourth embodiment of the present invention. Therefore, the fabrication process of the LCD device can be decreased, and the fabrication cost is also decreased.
  • FIG. 1 is a view illustrating a construction of a conventional 3D display
  • FIG. 2 is a cross sectional view of FIG. 1 ;
  • FIG. 3 is view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a first embodiment of the present invention
  • FIG. 4 is a cross sectional view of FIG. 3 ;
  • FIG. 5 is a detailed view illustrating a polarizing region and an alignment direction used in the present invention.
  • FIG. 6 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a second embodiment of the present invention
  • FIG. 7 is a cross sectional view of FIG. 6 ;
  • FIG. 8 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a third embodiment of the present invention.
  • FIG. 9 is a cross sectional view of FIG. 8 ;
  • FIG. 10 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a fourth embodiment of the present invention.
  • FIG. 11 is a view illustrating a structure of a polarizing film of FIG. 10 ;
  • FIG. 12 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a fifth embodiment of the present invention.
  • FIG. 1 3 is a cross sectional view of FIG. 12 ;
  • FIG. 14 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a sixth embodiment of the present invention.
  • FIG. 15 is a view illustrating a structure of a conductive polarizing film of FIG. 14 ;
  • FIG. 16 is a cross sectional view of FIG. 14 .
  • FIG. 3 is view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a first embodiment of the present invention
  • FIG. 4 is a cross sectional view of FIG. 3
  • FIG. 5 is a detailed view illustrating a polarizing region and an alignment direction used in the present invention
  • FIG. 6 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a second embodiment of the present invention
  • FIG. 7 is a cross sectional view of FIG. 6
  • FIG. 8 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a third embodiment of the present invention
  • FIG. 9 is a cross sectional view of FIG. 8 .
  • FIG. 10 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a fourth embodiment of the present invention
  • FIG. 11 is a view illustrating a structure of a polarizing film of FIG. 10
  • FIG. 12 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a fifth embodiment of the present invention
  • FIG. 13 is a cross sectional view of FIG. 12
  • FIG. 14 is a view illustrating a LCD device having a thin polarizing film and a thin phase retardation film according to a sixth embodiment of the present invention
  • FIG. 15 is a view illustrating a structure of a conductive polarizing film of FIG. 14
  • FIG. 16 is a cross sectional view of FIG. 14 .
  • Polarizing regions are given reference numerals of 30 , 31 , 33 , 34 , 60 , 61 , 80 and 81 in order to recognize the regions from a polarizing film because the polarizing directions are orthogonal at 90° in a lattice shape on one plane.
  • a first polarizing region 30 having a polarizing direction of 0° or 45° formed on a plane of the first transparent substrate aligned on a front surface of the backlight unit 2 and a second polarizing region 31 that has a polarizing direction of 90° or 135° are aligned in an orthogonal structure.
  • a first insulation layer 32 is aligned at a front surface of the first polarizing region 30 and the second polarizing region 31 .
  • a first transparent electrode 5 and a first alignment film 6 are disposed at the front surface of the same.
  • a liquid crystal layer 10 filled with a liquid crystal is disposed between the first alignment film 6 and the second alignment film 7 .
  • the alignment directions of the first alignment film 6 and the second alignment film 7 may be different based on the kinds of liquid crystal.
  • the alignment directions of the first alignment film 6 and the second alignment film 7 are vertical at the portions corresponding to the first polarizing region 30 and the second polarizing region 31 , but the alignments may be in the same direction depending of the kinds of the liquid crystal.
  • electromagnetic field is applied to the liquid crystal layer 10 , it is moved based on the characteristic of the liquid crystal. Therefore, it is needed to retard transmitting light.
  • a second transparent electrode 8 , a color filter 9 and a second insulation layer 35 are disposed at a front surface of the second alignment film 7 .
  • a third polarizing region 33 and a fourth polarizing region 34 are integrally formed at the next front surface in a structure that the polarizing direction is orthogonal at 900 with respect to the first polarizing region 30 and the second polarizing region 31 .
  • a non-reflection coating layer 24 is disposed at the front most side.
  • the polarizing films before and after the liquid crystal layer have the same polarizing direction, and the polarizing directions have 90° difference.
  • the polarizing films are formed like a structure that fine stripes are orthogonal from each other with the polarizing directions being 90° fine stripes are orthogonal on one plane.
  • the first polarizing region 30 and the second polarizing region 31 are on the front surface of the first transparent substrate 4
  • the third polarizing region 33 and the fourth polarizing region 34 are integrally formed at the back side of the second transparent substrate 11 .
  • the liquid crystal layer 10 is disposed therebetween.
  • the first polarizing region 30 and the second polarizing region 31 are alternately formed on the front surface of the first transparent substrate 4 .
  • the third polarizing region 33 and the fourth polarizing region 34 are alternately formed on the backside of the second transparent substrate 11 .
  • the polarizing regions formed at the portions corresponding to the first transparent substrate 4 and the second transparent substrate 11 have different polarizing directions.
  • the first polarizing region 30 has a polarizing direction of 0° or 45°
  • the third polarizing region 33 has a polarizing direction of 90° or 135°.
  • the polarizing direction is orthogonal at 90° between the first polarizing region 30 and the third polarizing region 33 .
  • the polarizing direction is orthogonal at 90° between the second polarizing region 31 and the fourth polarizing region 34 .
  • the operation of the LCD device according to the first embodiment of the present invention will be described.
  • the light when light transmits the first polarizing region 30 formed at the front surface of the first transparent substrate 40 through the backlight unit 2 , the light becomes a straight line polarizing light polarized at 0° or 45°. Since the light becomes a straight line polarizing state having 90° rotated polarizing direction after the light transmitted the liquid crystal layer 10 , so that a viewer can view the image transmitted the third polarizing region 33 having a polarizing direction of 90° or 135°.
  • the light from the backlight unit 2 transmits the second polarizing region 31 formed at the front surface of the first transparent substrate 4 , the light is changed to a straight line polarizing light polarized at an angle of 90° or 135° and is changed to a 90° rotated straight line polarizing light while transmitting the liquid crystal layer 10 . Therefore, as the light transmits the fourth polarizing region 34 having a polarizing direction of 0° or 45°, the viewer can view the images.
  • the first polarizing region 30 and the third polarizing region 33 are matched with the pitches of the pixels at the liquid crystal display panel, and the right eye image is displayed at the odd number row at the LCD panel, and the left eye image is displayed on the even number row, so that the right eye image transmits the fourth polarizing region 34 , and the left eye image transmits polarizing glasses 25 , so that the viewer can see a 3D image.
  • FIG. 6 is a view of the second embodiment
  • FIG. 7 is a cross sectional view of FIG. 6 .
  • a third polarizing film 52 formed of straight line polarizing films on its entire surface is disposed at the front surface of the backlight unit 2 .
  • the second 1 / 2 phase retardation film 50 and the transparent unit 51 are disposed at the front surface of the first transparent substrate 4 with a certain width and distance.
  • the first insulation layer 32 is disposed, and the first transparent electrode 5 and the first alignment film 6 are formed at the front surface of the same.
  • a liquid crystal layer 10 filled with liquid crystal is disposed between the first alignment 6 and the second alignment film 7 .
  • the second transparent electrode 8 , the color filter 9 and the second insulation layer 35 are sequentially disposed at the front surface of the second alignment film 7 .
  • the second transparent substrate 11 integrally formed of the third polarizing region 33 and the fourth polarizing region 34 is disposed at the next front surface.
  • a non-reflection coating layer 24 is disposed at the front most surface.
  • the polarizing films before and after the liquid crystal have the same polarizing directions with 90° differences in their polarizing directions.
  • new polarizing films are alternately orthogonal before and after the liquid crystal in fine stripe shapes having different polarizing directions of 90° at one plane.
  • the second 1 ⁇ 2 phase retardation film 50 , the liquid crystal layer 10 , the third polarizing region 33 and the fourth polarizing region 34 are sequentially engaged, and the polarizing films are integral with the above structure.
  • the light that transmitted the third polarizing film 52 and polarized at 90° or 135° transmits the second 1 ⁇ 2 phase retardation film 50 and has a 180° difference between incident light and the phase, so that the light is changed to straight line polarizing light having a 90° rotated polarizing direction, and the polarizing direction becomes 0°.
  • the light becomes straight line polarizing light having a 90° rotated polarizing direction while transmitting the liquid crystal layer 10 . Therefore, as the light transmits the third polarizing region 33 having a 90° or 135° polarizing direction, the viewer can view the image.
  • the transparent unit 51 and the fourth polarizing region 31 are matched with the pitches of the pixels, and the second 1 ⁇ 2 phase retardation film 50 and the third polarizing region 33 are matched with the pitches of the pixels.
  • the right eye image is displayed at the odd number row, and the left eye image is displayed at the even number row.
  • the right eye image transmits the fourth polarizing region 34
  • the left eye image transmits the third polarizing region 33 . Therefore, the viewer can view the 3D image using the polarizing glasses 25 .
  • FIG. 8 is a view of the third embodiment of the present invention
  • FIG. 9 is a cross sectional view of FIG. 8
  • the construction of the third embodiment of the present invention is similar with the second embodiment of the present invention except for a 1 ⁇ 4 phase retardation film 68 that is additionally provided in this embodiment.
  • the light from the backlight unit 2 is changed to straight line polarizing light having 90° or 135° polarizing direction while transmitting the third polarizing film 52 formed of straight line polarizing films.
  • the light transmitted the transparent unit 51 disposed at the front surface of the first transparent substrate 4 is changed to straight line polarizing light having a 90° rotated polarizing direction while transmitting the liquid crystal layer 10 . Thereafter, the light transmits the fourth polarizing region 34 having a 0° or 45° polarizing direction. Next, the polarized light transmits the 1 ⁇ 4 phase retardation film 68 and becomes a circular polarizing light. The viewer can view the image using the right eye polarizing glasses 72 of the circular polarizing glasses 70 .
  • the light transmitted the third polarizing film 52 and polarized in straight line with 90° or 135° has a 180° angle difference between the incident light and the phase, so that the light is changed to the straight line light having a 90° rotated polarizing direction.
  • the light is changed to have a straight line polarizing light state having a 90° rotated polarizing direction, while transmitting the liquid crystal layer 10 .
  • the light transmits the third polarizing region 33 having a 90° or 135° polarizing direction and then transmits the 1 ⁇ 4 phase retardation film 68 and becomes a circular polarizing state. Therefore, the viewer can view the image using the left eye circular polarizing glasses 71 of the circular polarizing glasses 70 .
  • the transparent unit 51 and the fourth polarizing region 34 are matched with the pitches of the pixels at the LCD panel, and the second 1 ⁇ 2 phase retardation film 50 and the third polarizing region 33 are matched with the pitches of the pixels.
  • the right eye image is displayed on the odd number row at the LCD panel, and the left eye image is displayed on the even number row, so that the right eye image transmits the fourth polarizing region 34 , and the left eye image transmits the third polarizing region 33 . Therefore, the viewer can view the 3D images using the circular polarizing glasses 70 .
  • the viewer can view the 3D images using the circular polarizing glasses 70 even if the viewer's head is tilted in the left or right direction.
  • FIGS. 10 and 11 shows the fourth embodiment of the present invention.
  • the basic construction is similar with the construction of the first embodiment of the present invention.
  • the first, second, third and fourth polarizing regions are formed in a lattice structure like the fifth, sixth, seventh, and eighth polarizing regions.
  • a 1 ⁇ 4 phase retardation film 68 is further disposed.
  • the same construction as the first embodiment will be omitted. Namely, only the fifth, sixth, seventh and eighth polarizing regions and the 1 ⁇ 4 phase retardation film 68 will be described.
  • FIG. 11 is a view illustrating an optical characteristic of the polarizing region.
  • the light outputted from the backlight transmits the fifth polarizing region 60 and is changed to a 45° rotated straight line light.
  • the light does not transmit the seventh polarizing region 80 .
  • the light transmitted the sixth polarizing region 61 is changed to a 135° rotated straight line light.
  • the eighth polarizing region 81 the light does not transmit the same.
  • the first transparent electrode 5 and the second transparent electrode 8 are disposed between the sixth polarizing region 61 and the eighth polarizing region 81 .
  • the liquid crystal layer 10 reacts with respect to electromagnetic field applied thereto for thereby retarding light, so that the viewer can view the 3D images.
  • the fifth polarizing region 60 , the sixth polarizing region 61 , the seventh polarizing region 80 , and the eighth polarizing region 81 have polarizing direction angle difference of 90° at the corresponding portions.
  • the 1 ⁇ 4 phase retardation film 68 is additionally provided.
  • the straight line polarizing light 25 of the first embodiment of the present invention is substituted with the circular polarizing glasses 70 . Therefore, the viewer can view the 3D images even when the viewer's head is tilted in the left or right direction.
  • FIG. 12 The fifth embodiment of the present invention is shown in FIG. 12 .
  • FIG. 13 is a cross sectional view of FIG. 12 .
  • the construction is basically similar with the third embodiment of the present invention.
  • the 1 ⁇ 2 phase retardation film and the transparent unit and the polarizing regions are formed in a lattice shape.
  • the light from the backlight unit 2 transmits the third polarizing film 52 formed of straight line polarizing films and is changed to straight line polarizing light having 90° or 135° polarizing directions.
  • the light transmitted the transparent unit 91 disposed at the front surface of the first transparent substrate 4 transmits the liquid crystal layer 10 and is changed to straight line polarizing light having 90° rotated polarizing direction.
  • the light transmits the eighth polarizing region 81 having a polarizing direction of 0° or 45°.
  • the polarized light transmits the 1 ⁇ 4 phase retardation film 68 and is changed to a circular polarizing state. Therefore, the viewer can see the image through the right circular polarizing glasses 72 of the circular polarizing light glasses 70 .
  • the light polarized at an angle of 90° or 135° and transmitted the third polarizing film 52 transmits the third 1 ⁇ 2 phase retardation film 90 and has 180° difference between the incident light and the phase. Therefore, the light is changed into straight line polarizing light having a 90° rotated polarizing direction.
  • This light transmits the liquid crystal layer 10 and is changed to straight line polarizing light having a 90° rotated polarizing direction. Therefore, the light can be changed to circular polarizing light while transmitting the seventh polarizing region 80 having a 135° polarizing direction and the 1 ⁇ 4 phase retardation film 68 . Therefore, the viewer can view the images using the left eye circular polarizing glasses 71 of the circular polarizing light glasses 70 .
  • the transparent unit 91 and the eighth polarizing region 81 are matched with the pitches of the pixels, and the third 1 ⁇ 2 phase retardation film 90 and the seventh polarizing region 80 are matched with the pitches of the pixels.
  • the right eye image is displayed at the portions of the transparent unit 91 and the eighth polarizing region 81 in the LCD panel, and the left eye image is displayed at the portions of the third 1 ⁇ 2 phase retardation film 90 and the seventh polarizing region 80 .
  • the right eye image transmits the eighth polarizing region 81
  • the left eye image transmits the seventh polarizing region 80 . Therefore, the viewer can view the 3D images using the circular polarizing light glasses 70 . In addition, even when the viewer's head is tilted in the left or right direction, it is possible to view the 3D images using the circular polarizing light glasses 70 .
  • the fifth polarizing region 60 , the seventh polarizing region 80 , and the eighth polarizing region 81 are all formed of a conductive metal.
  • the conductive metal represents an electrically conductive metal.
  • the conductive metal is aluminum.
  • two transparent electrodes and two insulation layers are not needed before and after the liquid crystal layer.
  • FIG. 14 is a view illustrating a structure of the present invention
  • FIG. 15 is a view illustrating an optical characteristic when the polarizing region is formed of a conductive metal
  • FIG. 16 is a cross sectional view of FIG. 14 .
  • the polarizing regions are divided into a sub pixel shape of the display like the first conductive polarizing film 100 and the second conductive polarizing film 101 .
  • the third conductive polarizing film 110 and the fourth conductive polarizing film 111 are formed of common electrodes.
  • the polarizing directions of the third conductive polarizing film 10 and the fourth conductive polarizing film 111 are orthogonal at 90°, which correspond to the first conductive polarizing film 100 and the second conductive polarizing film 101 .
  • the first conductive polarizing film 100 and the second conductive polarizing film 101 formed on the plane of the first transparent substrate 4 disposed at a front surface of the backlight unit 2 are orthogonal with a 90° polarizing direction difference for thereby achieving a polarizing film function and a conventional transparent electrode function.
  • the first alignment film 6 is disposed, and the liquid crystal layer 10 filled with liquid crystal is disposed between the first alignment film 6 and the second alignment film 7 .
  • the aligning directions of the first and second alignment films 6 and 7 may be changed depending on the kinds of the liquid crystal used.
  • an electromagnetic field is applied to the conductive polarizing film, the liquid crystal layer 10 is moved based on the characteristic of the liquid crystal for thereby retarding the transmitting light.
  • the third conductive polarizing film 110 and the fourth conductive polarizing film 111 are disposed at the front surface of the second alignment film 7 with both polarizing film function and transparent electrode function.
  • the color filter 9 and the second transparent substrate 11 are disposed.
  • the 1 ⁇ 4 phase retardation film 68 is disposed, and the non-reflection coating layer 24 is disposed at the front most surface.
  • the thin polarizing film is formed using a conductive metal, since there are provided both polarizing film function and electrode function, two transparent electrodes and two insulation layers are not needed before and after the liquid crystal layer as compared to the conventional LCD device, so that the fabrication process of the LCD device is simplified, and the fabrication unit cost is decreased.
  • polarizing films are disposed very near the LCD device, so that a viewing angle is not limited in upper and lower directions wherein the limited viewing angle has been a big problem in the conventional art.
  • a viewing distance is not limited in forward and backward directions. Multiple people can concurrently view 3D images irrespective of the viewing angle or distance.
  • the fabrication process of the LCD device can be decreased, and the fabrication cost of the 2D and 3D LCD device can be decreased.

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  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
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  • Engineering & Computer Science (AREA)
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US11/160,737 2004-07-27 2005-07-06 Liquid crystal display device having thin polarizing film and thin phase retardation film Abandoned US20060023143A1 (en)

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US13/411,466 US8269904B2 (en) 2004-07-27 2012-03-02 Stereoscopic TFT-LCD with wire grid polarizer affixed to internal surfaces substrates
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US13/073,979 Expired - Fee Related US8184216B2 (en) 2004-07-27 2011-03-28 Stereoscopic TFT-LCD with wire grid polarizer affixed to internal surfaces substrates
US13/411,466 Expired - Fee Related US8269904B2 (en) 2004-07-27 2012-03-02 Stereoscopic TFT-LCD with wire grid polarizer affixed to internal surfaces substrates
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US13/411,466 Expired - Fee Related US8269904B2 (en) 2004-07-27 2012-03-02 Stereoscopic TFT-LCD with wire grid polarizer affixed to internal surfaces substrates
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US20160238884A1 (en) * 2015-02-13 2016-08-18 Xiamen Tianma Micro-Electronics Co., Ltd. Liquid crystal display panel and fabrication method thereof
US9857624B2 (en) * 2015-02-13 2018-01-02 Xiamen Tianma Micro-Electronics Co., Ltd. Liquid crystal display panel and fabrication method thereof
US9891466B2 (en) * 2015-02-13 2018-02-13 Xiamen Tianma Micro-Electronics Co., Ltd. Liquid crystal display panel and fabrication method thereof
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US10234719B2 (en) * 2015-07-30 2019-03-19 Boe Technology Group Co., Ltd. Display panel and manufacturing method therefor, drive method and display device
CN106873215A (zh) * 2015-11-30 2017-06-20 乐金显示有限公司 多曲面液晶显示面板
CN109073921A (zh) * 2016-03-29 2018-12-21 夏普株式会社 开关式反射镜面板、及开关式反射镜器件
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US8184216B2 (en) 2012-05-22
US8233104B2 (en) 2012-07-31
US20090310044A1 (en) 2009-12-17
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