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WO2016065659A1 - Structure de compensation de panneau à cristaux liquides et dispositif d'affichage à cristaux liquides - Google Patents

Structure de compensation de panneau à cristaux liquides et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2016065659A1
WO2016065659A1 PCT/CN2014/090332 CN2014090332W WO2016065659A1 WO 2016065659 A1 WO2016065659 A1 WO 2016065659A1 CN 2014090332 W CN2014090332 W CN 2014090332W WO 2016065659 A1 WO2016065659 A1 WO 2016065659A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
compensation
crystal panel
film
rth1
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2014/090332
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English (en)
Chinese (zh)
Inventor
海博
康志聪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
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 Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/399,944 priority Critical patent/US20160124264A1/en
Publication of WO2016065659A1 publication Critical patent/WO2016065659A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133634—Birefringent elements, e.g. for optical compensation the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis
    • 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
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal panel compensation architecture and a liquid crystal display device.
  • LCD Liquid Crystal Display
  • TFT Thin Film Transistor
  • the linear liquid crystal for producing a liquid crystal display panel is a substance having a birefringence ⁇ n.
  • the light When the light passes through the liquid crystal molecules, it can be divided into two directions: ordinary ray and extraordinary ray, if the light is obliquely incident.
  • the liquid crystal molecules produce two refracted rays.
  • the light characteristics of the liquid crystal cell are usually measured by the phase delay ⁇ n ⁇ d, also known as the optical path difference, ⁇ n is the birefringence, d is the thickness of the liquid crystal cell, and the difference in phase retardation at different viewing angles of the liquid crystal cell is the problem of viewing angle. origin.
  • the phase retardation of a good optical compensation film can cancel out the phase retardation of the linear liquid crystal, and the viewing angle of the liquid crystal panel can be widened.
  • the compensation principle of the optical compensation film is generally to correct the phase difference generated by the liquid crystal at different viewing angles, so that the birefringence properties of the liquid crystal molecules are compensated for symmetry. Compensation by optical compensation film can effectively reduce the light leakage of the dark state picture, and can greatly improve the contrast of the picture within a certain angle of view.
  • the compensation film can be divided into a phase difference film, a color difference compensation film, and a viewing angle expansion film which are simply changed in phase.
  • the use of an optical compensation film can reduce the amount of light leakage in the dark state of the liquid crystal display, and can greatly improve the contrast, chromaticity and overcome some gray scale inversion problems in a certain viewing angle.
  • the main parameters for measuring the characteristics of the optical compensation film include the in-plane compensation value Ro in the plane direction, the thickness compensation value Rth in the thickness direction, the refractive index N, and the film thickness D, which satisfy the following relationship:
  • Rth [(Nx+Ny)/2-Nz] ⁇ D
  • Nx is the refractive index along the slow axis (the axis with the largest refractive index, that is, the direction of vibration where the light has a slower propagation velocity) in the plane of the film
  • Ny is the fast axis along the plane of the film (with the smallest refractive index)
  • Nz is the refractive index in the plane of the film (perpendicular to Nx and Ny).
  • the optical compensation film used is different for different liquid crystal display modes, that is, different liquid crystal cell types, and the Ro and Rth values are also adjusted to appropriate values. Most of the optical compensation films used in the large-size LCD TVs are for the VA (Vertical Alignment) display mode.
  • the early use of Konica (Konica) N-TAC has been developed to form the OPTES company. Zeonor, Fujitsu's F-TAC series, Nitto Denko's X-plate, etc.
  • FIG. 1 is a dark state full-view brightness contour distribution diagram of the liquid crystal panel compensated by a conventional compensation architecture
  • 2 is a contrast contour distribution map of a full-view angle of the liquid crystal panel compensated by the double-layer dual-axis compensation architecture.
  • the present invention provides a liquid crystal panel compensation architecture.
  • a liquid crystal panel having an optical path difference of 324.3 to 342.7 nm the dark state light leakage problem of the liquid crystal panel can be effectively reduced by setting a compensation value. , increase the contrast and sharpness of large viewing angles.
  • a liquid crystal panel compensation structure comprising: a liquid crystal panel; and a first compensation film and a second compensation film respectively disposed on two sides of the liquid crystal panel;
  • the liquid crystal panel is provided with a liquid crystal layer including a plurality of liquid crystal molecules,
  • the refractive index anisotropy of the liquid crystal layer is ⁇ n, the thickness is d, and the pretilt angle of the liquid crystal molecules is ⁇ ;
  • the first compensation film is a biaxial compensation film, and the in-plane compensation value is Ro1, and the thickness compensation value is Rth1;
  • the second compensation film is a uniaxial compensation film, and the thickness compensation value is Rth2, wherein:
  • the first compensation film is further provided with a first polarizing film and a first protective film; and the second compensation film is further provided with a second polarizing film and a second protective film.
  • the materials of the first polarizing film and the second polarizing film are both polyvinyl alcohol.
  • the materials of the first protective film and the second protective film are all cellulose triacetate.
  • the angle between the absorption axis of the first polarizing film and the slow axis of the first compensation film is 90°; the angle between the absorption axis of the second polarizing film and the slow axis of the second compensation film It is 90°.
  • a first adhesive layer is further disposed between the liquid crystal panel and the first compensation film; a second adhesive layer is further disposed between the liquid crystal panel and the second compensation film;
  • the materials of the adhesive layer and the second adhesive layer are both pressure sensitive adhesives.
  • the liquid crystal panel is a liquid crystal panel in a vertical alignment mode.
  • a liquid crystal display device including a liquid crystal panel and a backlight module.
  • the liquid crystal panel is disposed opposite to the backlight module, and the backlight module provides a display light source to the liquid crystal panel. And causing the liquid crystal panel to display an image, wherein the liquid crystal panel adopts the supplement as described above Reimbursement of the LCD panel.
  • the dark state light leakage problem of the liquid crystal panel can be effectively reduced, and the problem is increased.
  • the contrast and sharpness of the viewing angle enhances the visual range of the large viewing angle.
  • FIG. 1 is a view showing a brightness profile of a dark state full-view angle of a conventional liquid crystal panel.
  • FIG. 2 is a view showing a contour view of a full-view angle of the liquid crystal panel shown in FIG. 1.
  • FIG. 3 is an exemplary illustration of a liquid crystal display device according to an embodiment of the present invention.
  • FIG. 4 is an exemplary illustration of a liquid crystal panel provided by an embodiment of the present invention.
  • FIG. 5 is a graph showing a trend of a dark state light leakage with a compensation value when a liquid crystal optical path difference is 324.3 nm according to an embodiment of the present invention.
  • FIG. 6 is a graph showing a trend of a dark state light leakage with a compensation value when a liquid crystal optical path difference is 333.6 nm according to an embodiment of the present invention.
  • FIG. 7 is a graph showing a trend of a dark state light leakage with a compensation value when a liquid crystal optical path difference is 342.7 nm according to an embodiment of the present invention.
  • FIG. 8 is a brightness profile view of a dark state full view angle of a compensated liquid crystal panel in a specific embodiment.
  • Fig. 9 is a view showing a contour distribution of a full viewing angle and the like of the liquid crystal panel shown in Fig. 7.
  • FIG. 10 is a brightness profile view of a dark state full-view angle of the compensated liquid crystal panel in another embodiment.
  • Fig. 11 is a view showing a contour distribution of a full-view angle and the like of the liquid crystal panel shown in Fig. 10.
  • FIG. 12 is a view showing a brightness state distribution of a dark state full-view angle of a liquid crystal panel after compensation in another embodiment.
  • Fig. 13 is a view showing a contour distribution of a full viewing angle and the like of the liquid crystal panel shown in Fig. 12.
  • the liquid crystal display device of the present embodiment includes a liquid crystal panel 100 and a backlight module 200.
  • the liquid crystal panel 100 is disposed opposite to the backlight module 200, and the backlight module 200 provides a display light source.
  • the liquid crystal panel 100 is configured to display an image on the liquid crystal panel 100, wherein the liquid crystal panel 100 is a liquid crystal panel compensated by a compensation structure having a double-layer compensation film.
  • the liquid crystal panel compensation structure is as shown in FIG. 4 , and the liquid crystal panel compensation structure includes a liquid crystal panel 10 and first compensation films 11 and second compensation films 12 respectively disposed on two sides of the liquid crystal panel 10 .
  • the first compensation film 11 is also provided with a first polarizing film 13 and a first protective film 15 in this order;
  • the second compensation film 12 is further provided with a second polarizing film 14 and a second protective film 16 in this order.
  • a first adhesive layer 17 is further disposed between the liquid crystal panel 10 and the first compensation film 11;
  • a second adhesive layer 18 is further disposed between the liquid crystal panel 10 and the second compensation film 12.
  • the liquid crystal panel 10 is a Vertical Alignment Cell (VA Cell); the first polarizing film 13 and the second polarizing film 14 are made of polyvinyl alcohol (PVA), and the first polarizing film 13 is used.
  • the angle between the absorption axis and the slow axis of the first compensation film 11 is set to 90°, and the angle between the absorption axis of the second polarizing film 14 and the slow axis of the second compensation film 12 is set to 90°; the first protective film 15
  • the material of the second protective film 16 is triacetyl cellulose (TAC), and the TAC protective films 15, 16 are mainly used to protect the PVA polarizing films 13, 14 to lift the PVA polarizing film 13, 14.
  • TAC triacetyl cellulose
  • the liquid crystal panel 10 is provided with a liquid crystal layer including a plurality of liquid crystal molecules having a refractive index anisotropy of ⁇ n, a thickness d, and a liquid crystal molecule having a pretilt angle of ⁇ .
  • the first compensation film 11 is a two-axis compensation film
  • the in-plane compensation value is represented by Ro1
  • the thickness compensation value is represented by Rth1
  • the second compensation film 12 is a uniaxial compensation film
  • the thickness compensation value is adopted.
  • Rth2 said.
  • the purpose is to effectively reduce the liquid crystal panel by appropriately setting the compensation values of the first compensation film 11 and the second compensation film 12 for the liquid crystal panel having an optical path difference of 324.3 to 342.7 nm.
  • Dark-state light leakage problems increase the contrast and sharpness of large viewing angles.
  • the pretilt angle ⁇ is 85° ⁇ ⁇ ⁇ 90°;
  • the four quadrant liquid crystal tilt angles are 45°, 135°, 225° and 315°, respectively;
  • the optical path difference ⁇ n ⁇ d is 342.8 nm ⁇ ⁇ n ⁇ d ⁇ 361.4 nm.
  • Light source blue-yttrium aluminum garnet light emitting diode (Blue-YAG LED) spectrum
  • the central brightness of the light source is defined as 100 nits (nit);
  • the light source distribution is Lambert's distribution.
  • FIG. 5 is a graph showing a trend of a dark state light leakage with a compensation value when the liquid crystal optical path difference is 324.3 nm and the pretilt angle ⁇ is 89° in the liquid crystal display device of the embodiment;
  • FIG. The liquid crystal display device has a trend of changing the dark state light leakage with the compensation value when the liquid crystal optical path difference is 333.6 nm and the pretilt angle ⁇ is 89°;
  • FIG. 7 is a liquid crystal display device of the present embodiment having a liquid crystal optical path difference of 342.7 nm. The dark state light leakage when the inclination angle ⁇ is 89° changes with the compensation value trend graph.
  • the corresponding compensation values of the first compensation film 11 and the second compensation film 12 are respectively: 55 nm ⁇ Ro1 ⁇ 78 nm; 208 nm ⁇ Rth1 ⁇ 293 nm; Y1 nm ⁇ Rth2 ⁇ Y2 nm;
  • Rth [(Nx+Ny)/2-Nz] ⁇ D
  • the compensation value can be changed in the following three ways:
  • the thickness D is changed to change the compensation value
  • the refractive index N is changed to change the compensation value
  • the thickness D and the refractive index N are simultaneously changed to change the compensation value.
  • FIG. 8 is a dark state full-view and other brightness contour distribution diagram of the liquid crystal panel after compensation in a specific embodiment
  • FIG. 9 is a full-view equal-contrast contour of the compensated liquid crystal panel in the specific embodiment. Distribution.
  • the maximum dark state light leakage value measured is 0.1 nit. Comparing FIG. 8 with FIG.
  • FIG. 10 is a dark state full-view and other brightness contour distribution diagram of the compensated liquid crystal panel in an embodiment
  • FIG. 11 is a full-view equal-contrast contour of the compensated liquid crystal panel in the embodiment. Distribution.
  • the maximum dark state light leakage value measured was 0.14 nit. Comparing FIG. 10 with FIG.
  • FIG. 12 is a dark state full-view and other brightness contour distribution diagram of the compensated liquid crystal panel in a specific embodiment
  • FIG. 13 is a full-view equal-contrast contour of the compensated liquid crystal panel in the embodiment. Distribution.
  • the maximum dark state light leakage value measured was 0.19 nit. Comparing FIG. 12 with FIG.
  • the dark state light leakage problem of the liquid crystal panel can be effectively reduced, and the contrast and sharpness of the large viewing angle are increased. Degree, to enhance the visual range of large viewing angles.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne une structure de compensation d'un panneau à cristaux liquides. La structure de compensation du panneau à cristaux liquides comprend un panneau à cristaux liquides (10), un premier film de compensation (11) et un second film de compensation (12) qui sont disposés sur deux côtés du panneau à cristaux liquides (10) ; le panneau à cristaux liquides (10) comprend une couche de cristaux liquides comprenant une pluralité de molécules de cristaux liquides, l'anisotropie d'indice de réfraction de la couche de cristaux liquides est Δn, l'épaisseur de la couche de cristaux liquides est d, et des angles de pré-inclinaison des molécules de cristaux liquides sont θ ; le premier film de compensation (11) est un film de compensation biaxial avec une valeur de compensation dans le plan de Ro1 et une valeur de compensation d'épaisseur de Rth1 ; le second film de compensation (12) est un film de compensation homotaxial avec une valeur de compensation d'épaisseur de Rth2, où 324,3 nm ≤ Δn * d ≤ 342,7 nm ; 85° ≤ θ < 90° ; 55 nm ≤ Ro1 ≤ 78 nm ; 208 nm ≤ Rth1 ≤ 293 nm ; Y1nm ≤ Rth2 ≤ Y2nm ; Y1 = 0,001897 * (Rth1)2 - 2,01 * Rth1 + 438,7 ; Y2 = -0,005756 * (Rth1)2 + 1,654 * Rth1 + 55,7. L'invention concerne également un dispositif d'affichage à cristaux liquides ayant la structure de compensation de panneau à cristaux liquides.
PCT/CN2014/090332 2014-10-29 2014-11-05 Structure de compensation de panneau à cristaux liquides et dispositif d'affichage à cristaux liquides Ceased WO2016065659A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/399,944 US20160124264A1 (en) 2014-11-05 2014-11-05 Compensation structure for liquid crystal panels and the liquid crystal displays

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410596975.5A CN104317104A (zh) 2014-10-29 2014-10-29 液晶面板补偿架构及液晶显示装置
CN201410596975.5 2014-10-29

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105278151A (zh) * 2015-11-11 2016-01-27 深圳市华星光电技术有限公司 液晶面板
CN105334670A (zh) * 2015-12-08 2016-02-17 深圳市华星光电技术有限公司 液晶面板补偿架构及其光学补偿方法
CN105334672A (zh) * 2015-12-08 2016-02-17 深圳市华星光电技术有限公司 液晶面板补偿架构及其光学补偿方法
CN105334671A (zh) * 2015-12-08 2016-02-17 深圳市华星光电技术有限公司 液晶面板补偿架构及其光学补偿方法
CN116338847A (zh) 2021-12-23 2023-06-27 群创光电股份有限公司 电子装置

Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2000122060A (ja) * 1998-08-11 2000-04-28 Sharp Corp 反射型液晶表示装置
US20090322997A1 (en) * 2008-06-25 2009-12-31 Fujifilm Corporation Liquid crystal display device
CN102798923A (zh) * 2012-08-23 2012-11-28 深圳市华星光电技术有限公司 光学补偿结构及显示装置
CN103185988A (zh) * 2011-12-28 2013-07-03 斯坦雷电气株式会社 液晶显示装置及其制造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000122060A (ja) * 1998-08-11 2000-04-28 Sharp Corp 反射型液晶表示装置
US20090322997A1 (en) * 2008-06-25 2009-12-31 Fujifilm Corporation Liquid crystal display device
CN103185988A (zh) * 2011-12-28 2013-07-03 斯坦雷电气株式会社 液晶显示装置及其制造方法
CN102798923A (zh) * 2012-08-23 2012-11-28 深圳市华星光电技术有限公司 光学补偿结构及显示装置

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