WO2013004044A1 - 液晶显示器 - Google Patents

液晶显示器 Download PDF

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Publication number
WO2013004044A1
WO2013004044A1 PCT/CN2011/079219 CN2011079219W WO2013004044A1 WO 2013004044 A1 WO2013004044 A1 WO 2013004044A1 CN 2011079219 W CN2011079219 W CN 2011079219W WO 2013004044 A1 WO2013004044 A1 WO 2013004044A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
plate
crystal display
light
refractive index
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Ceased
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PCT/CN2011/079219
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English (en)
French (fr)
Inventor
侯鸿龙
贺成明
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US13/319,518 priority Critical patent/US20130010241A1/en
Publication of WO2013004044A1 publication Critical patent/WO2013004044A1/zh
Anticipated expiration legal-status Critical
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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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
    • G02B2207/117—Adjustment of the optical path length
    • 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
    • G02F1/133631—Birefringent elements, e.g. for optical compensation with a spatial distribution of the retardation value
    • 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
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a liquid crystal display capable of reducing crosstalk between pixels while reducing the influence on the two-dimensional display of the display.
  • a common glasses type 3D liquid crystal display has a cross section as shown in Figure 1, including TFT-LCD modules (Thin Film Transistor-Liquid Crystal Display: Thin film FET liquid crystal display) and phase retarder.
  • TFT-LCD modules Thin Film Transistor-Liquid Crystal Display: Thin film FET liquid crystal display
  • phase retarder The pixel signals of such a 3D liquid crystal display panel are loops of the left eye signal and the right eye signal from top to bottom, respectively, so that the signals displayed by the display are received by the left and right eyes in a horizontally staggered manner, as shown in FIG. 2 .
  • a phase retarder is attached in front of the TFT-LCD module.
  • the phase alignment of the phase retarder respectively gives different phase compensation values for the left and right eyes, so that the TFT is made.
  • the left and right eye signals of the same vertical polarization state emitted by the LCD module are converted into polarized light of different left and right eyes.
  • the polarization state of the light emitted by the TFT-LCD module is a vertical polarization state
  • the pixel signal of the right eye is horizontally polarized by the ⁇ /2 wave plate
  • the pixel signal of the left eye is maintained vertically by the 0 phase wave plate. State, and then through the polarized glasses, to distinguish between left and right eye signals.
  • the vertical large viewing angle is limited, and the viewing angle cannot exceed ⁇ 1.
  • the pixel signal of the left eye is observed to pass through the ⁇ /2 wave plate, right.
  • the pixel signal of the eye passes through the 0 phase wave plate, so that the left eye signal originally observed through the vertical polarizer of the left eye simultaneously observes the vertical right eye signal generated by the right eye pixel signal through the 0 phase wave plate with a large viewing angle.
  • the right eye signal originally observed through the horizontal polarizer of the right eye also observes the horizontal left eye signal generated by the left eye pixel signal due to the large angle of view passing through the ⁇ /2 wave plate, resulting in a so-called crosstalk phenomenon. , that is, the drag phenomenon caused by the high-contrast picture outline in the background portion.
  • Figure 3 is a way to improve the crosstalk phenomenon of the liquid crystal display, that is, design a black matrix in the middle of the ⁇ /2 wave plate and the 0 phase wave plate on the original phase retarder.
  • Matrix by reducing the diameter of the ⁇ /2 wave plate and the 0 phase wave plate of the original diameter a to b, so that the angles of the left and right eye signals through the non-corresponding phase retarder become larger at the large viewing angle, thereby increasing the generation The viewing angle of the crosstalk phenomenon.
  • the liquid crystal display is used to view a two-dimensional image
  • the brightness of the liquid crystal display is lowered when the two-dimensional image is displayed due to the presence of a black matrix on the phase retarder.
  • the present invention is implemented as follows:
  • a liquid crystal display comprising a TFT-LCD module and a corresponding phase retarder, wherein an optical path difference for reducing light emission on the phase retarder is disposed between the TFT-LCD module and the phase retarder a dimming plate; the refractive index of the dimming plate is greater than a refractive index of the liquid crystal in the TFT-LCD module; and the light emitted on the phase retarder is reduced by simultaneously changing the thickness and the refractive index of the dimming plate
  • the refractive index of the dimming plate is 1.5-1.7; the dimming plate is further provided with a black bottom plate for reducing crosstalk; the phase retarder comprises a 0 phase wave plate and a ⁇ /2 wave plate. Combination of ⁇ /4 wave plates with combined or slow axis angles 45 and 135.
  • a liquid crystal display comprising a TFT-LCD module and a corresponding phase retarder, wherein an optical path difference for reducing light emission on the phase retarder is disposed between the TFT-LCD module and the phase retarder Dimming plate.
  • a liquid crystal display comprising a TFT-LCD module and a phase retarder, wherein the phase retarder is disposed on the TFT-LCD module, wherein the TFT-LCD module is provided for reducing A dimming plate for retarding the optical path length of the light emitted from the sheet.
  • the refractive index of the light control plate is greater than the refractive index of the liquid crystal in the TFT-LCD module.
  • the optical path difference of the light emitted on the phase retarder is reduced by increasing the thickness of the dimming plate.
  • the optical path difference of the light exiting the phase retarder is reduced by increasing the refractive index of the light modulating plate.
  • the optical path difference of the light emitted on the phase retarder is reduced by simultaneously changing the thickness and refractive index of the light-adjusting plate.
  • the light guide plate has a refractive index of 1.5 to 1.7.
  • the dimming plate is further provided with a black bottom plate for reducing crosstalk.
  • the phase retarder comprises a combination of a 0 phase wave plate and a ⁇ /2 wave plate.
  • the phase retarder comprises a combination of ⁇ /4 wave plates of slow axis angles 45 and 135.
  • the liquid crystal display of the present invention passes through the TFT-LCD module and the phase retarder, which has a problem that crosstalk is likely to occur when viewing a 3D image, and the display quality is deteriorated or the brightness is lowered when viewing a two-dimensional image.
  • a dimming plate for reducing the optical path difference of the light emitted on the phase retarder is provided to reduce the crosstalk phenomenon when viewing the 3D image while reducing the problem of luminance attenuation when viewing the 2-dimensional image.
  • FIG. 1 is a schematic structural view of a prior art liquid crystal display
  • FIG. 2 is a panel signal diagram of a prior art liquid crystal display
  • FIG. 3 is a schematic structural view of a prior art liquid crystal display having a black matrix disposed on a phase retarder
  • FIG. 4 is a schematic structural view of a preferred embodiment of a liquid crystal display of the present invention.
  • the liquid crystal display 100 includes a TFT-LCD module 110 (for example, an LCD panel) and a corresponding phase delay.
  • the pixel on the TFT-LCD module 110 includes a pixel 111 of a left-eye signal and a pixel 112 of a right-eye signal.
  • the pixel 111 of the left-eye signal emits a polarization signal through a corresponding region of the phase retarder 120, and the right-eye signal
  • the pixel 112 uses another corresponding region of the phase retarder 120 to emit another polarized signal.
  • the liquid crystal display 100 of the present invention further includes a dimming plate 130 between the TFT-LCD module 110 and the phase retarder 120, and the dimming plate 130 is for reducing the optical path difference of the light emitted from the phase retarder 120.
  • the dimming plate 130 which reduces the optical path difference of the light emitted from the phase retarder 120 is used, the light of the left-eye pixel or the right-eye pixel is reduced to enter the wrong phase retarder region (range ), avoiding the occurrence of crosstalk.
  • the refractive index of the light control panel 130 is greater than the refractive index of the liquid crystal 113 in the TFT-LCD module 110. Only when the refractive index of the dimming plate 130 is greater than the refractive index of the liquid crystal 113 in the TFT-LCD module 110 can the angle of refraction of the light incident from the liquid crystal 113 into the dimming plate 130 be smaller than the incident angle, thereby enabling The optical path difference of the light emitted from the phase retarder 120 is reduced to avoid the purpose of crosstalk.
  • the liquid crystal display 100 of the present invention can reduce the optical path difference of the light emitted on the phase retarder 120 by changing the parameters of the dimming plate 130 in the following manner.
  • the optical path difference of the light emitted on the phase retarder 120 is reduced by increasing the thickness of the light control plate 130.
  • the refractive index of the dimming plate 130 cannot be changed. Since the refractive index of the dimming plate 130 is greater than the refractive index of the liquid crystal 113 in the TFT-LCD module 110, the dimming plate 130 is added.
  • the thickness can reduce the optical path difference of the light emitted from the phase retarder 120 (increasing the thickness of the light-adjusting plate 130 also reduces the distance traveled in the air before entering the phase retarder 120 after the light exits from the light-adjusting plate 130).
  • crosstalk is avoided. This method can be unaffected by the material of the dimming plate 130. However, when the refractive index of the material of the dimming plate 130 is small, the crosstalk phenomenon is better to increase the weight of the liquid crystal display 100. .
  • the optical path difference of the light emitted on the phase retarder 120 is reduced by increasing the refractive index of the light control plate 130.
  • the optical path difference of the light emitted on the phase retarder 120 can be directly increased by changing the refractive index of the dimming plate 130, thereby reducing the light output of the same pixel on the phase retarder 120. Area, and thus avoid crosstalk.
  • the crosstalk phenomenon can be better improved on the basis of the original structure of the original liquid crystal display 110.
  • the optical path difference of the light emitted on the phase retarder 120 is reduced by simultaneously changing the thickness and refractive index of the light control plate 130.
  • the material and thickness of the dimming plate 130 can be changed, a comprehensive consideration can be made in improving the crosstalk phenomenon.
  • the thickness of the light-adjusting plate 130 can be somewhat reduced, so that the crosstalk phenomenon is improved while ensuring the display quality (for example, the crosstalk phenomenon is excessively improved by the method).
  • the distortion of the screen due to the refraction of the dimming plate 130 affects the display quality of the screen.
  • the increase in the crosstalk phenomenon due to the replacement of the material of the light-adjusting plate 130 can be offset by increasing the thickness of the light-adjusting plate 130.
  • the dimming plate 130 is further provided with a black matrix for reducing crosstalk (Black).
  • Matrix for reducing crosstalk
  • the black substrate 131 is disposed on the light-adjusting plate 130 of the liquid crystal panel.
  • the black matrix 131 also has a function of preventing the external light source from causing the TFT-LCD module 110 to malfunction. It is mainly composed of single-layer chromium, low-reflection chromium and resin materials.
  • the liquid crystal display 100 of the present invention can reduce the design area of the black matrix 131 by the arrangement of the dimming plate 130, so that the aperture ratio of the liquid crystal panel is not reduced by considering the crosstalk phenomenon in 3D, but the black matrix 131 and the dimming panel 130 are It can achieve the best effect of removing crosstalk and ensure the aperture ratio of the liquid crystal panel.
  • the phase retarder 120 is a combination of a 0 phase wave plate and a ⁇ /2 wave plate or a combination of a slow axis angle 45 and a ⁇ /4 wave plate of 135.
  • a combination of a 0 phase wave plate and a ⁇ /2 wave plate it is necessary to match the glasses with horizontal polarization absorption and vertical polarization absorption on the other side to achieve a 3D effect display effect.
  • a combination of ⁇ /4 wave plates with slow axis angles of 45 and 135 it is necessary to match the eyes with one side for left-handed polarization absorption and the other for right-handed polarization absorption to achieve a 3D effect display effect.
  • the user can select a suitable combination of wave plates to generate polarization signals for the left and right eyes as needed.
  • the liquid crystal display 100 includes a TFT-LCD module 110, a corresponding phase retarder 120, and a dimming plate 130.
  • the TFT-LCD module 110 includes a pixel 111 of a left-eye signal, a pixel 112 of a right-eye signal, and a liquid crystal 113.
  • a black bottom plate 131 is provided on the board 130. It can be seen from the figure that the light emitted by the lamp passes through the light emitted by the pixel 111 of the left-eye signal, and the liquid crystal 113 reaches the side of the dimming plate 130 on which the black substrate 131 is disposed, enters the dimming plate 130, and passes through the entire dimming. After the plate 130 reaches the phase retarder 120, it is emitted.
  • the incident angle of the incident light into the dimming plate 130 is ⁇ 1, which is refracted at the interface of the dimming plate 130.
  • the refraction angle is ⁇ 2.
  • the optical path difference OPD is reduced by [D*tan( ⁇ 1)-D*tan( ⁇ 2)], where D
  • D the thickness of the dimming plate 130
  • the incident angle ⁇ 1 30 degrees
  • the refractive index of the dimming plate 130 is generally set to a range of 1.5 to 1.7.
  • the liquid crystal display 100 of the present invention changes the thickness and refractive index of the light-adjusting plate 130 (i.e., the refractive index between the liquid crystal 113 and the phase retarder 120) so that the refraction angle of the light travel becomes small, and the optical path difference becomes short, realizing light. Less leakage to the wrong phase retarder 120 avoids some crosstalk phenomenon, and at the same time, the black bottom plate can be designed to have a smaller area, so that the aperture ratio of the liquid crystal panel is not overcome by crosstalk when the 3D display is overcome. The phenomenon is much lower.
  • the dimming plate 130 may be disposed in the TFT-LCD module 110 for reducing the optical path difference of the light emitted on the phase retarder 120.
  • the dimming plate 130 can be one of the two substrates of the TFT-LCD module 110, for example, a color filter (Color) Filter, CF) glass substrate. Therefore, similar to the above description, the optical path difference of the light emitted on the phase retarder 120 can be reduced by changing the parameters (such as thickness, refractive index) of the dimming plate 130 of the TFT-LCD module 110.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种液晶显示器（100），包括TFT-LCD模组（110）以及相应的相位延迟片（120）。所述的TFT-LCD模组（110）和所述相位延迟片（120）之间设置有用于减少在所述相位延迟片（120）上出光的光程差的调光板（130），或者，TFT-LCD模组（110）设有用于减少在所述相位延迟片（120）上出光的光程差的调光板（130）。该液晶显示器（100）可减小观看3D图像时的串扰现象。

Description

液晶显示器 技术领域
本发明涉及液晶显示领域，特别是涉及一种可减少像素之间的串扰，同时可减小对显示器2维显示的影响的液晶显示器。
 背景技术
随着3D技术的发展，人们对于通过3D显示器观看3D电影的需求越来越高，一种常见的眼镜式3D液晶显示器截面如图1所示，其中包括TFT-LCD模组（Thin Film Transistor-Liquid Crystal Display：薄膜场效应管液晶显示器）以及相位延迟片。此类3D液晶显示器面板的像素信号由上而下分别是左眼信号和右眼信号的循环，使得显示器显示的信号通过横条式的上下交错的方式被左右眼接收，如图2所示。
在TFT-LCD模组前贴有相位延迟片，根据显示器上的像素信号的由上而下的左右眼信号的循环，通过相位延迟片的相位排列分别给予左右眼不同的相位补偿值，使得TFT-LCD模组发出的相同垂直偏振态的左右眼信号转换为左右眼不同的偏极化光。如图1所示，假设TFT-LCD模组出光的偏振态为垂直偏振态，右眼的像素信号通过λ/2波片变成水平偏振，左眼的像素信号通过0相位波片维持垂直偏振态，再透过偏振眼镜，得以区分左右眼信号。
但在图1的设计中存在一个缺点，即垂直大视角观察受限，视角不能超过±θ1，如观察视角超过±θ1，则会观察到左眼的像素信号透过λ/2波片，右眼的像素信号透过0相位波片，使得原本透过左眼的垂直偏光镜观察到的左眼信号同时还观察到右眼像素信号由于大视角通过0相位波片而产生的垂直右眼信号；而原本透过右眼的水平偏光镜观察到的右眼信号同时还观察到左眼像素信号由于大视角通过λ/2波片而产生的水平左眼信号，产生所谓的串扰现象（crosstalk），即高对比度的画面轮廓在背景部产生的拖曳现象。
图3为改善液晶显示器的串扰现象的一种方式，即在原相位延迟片上的λ/2波片和0相位波片中间设计黑底（black matrix），通过将原直径为a的λ/2波片和0相位波片的直径缩小为b，使得左右眼信号大视角时通过非对应的相位延迟片的角度变大，从而增加了不产生串扰现象的观看角度。但是使用该液晶显示器观看2维图像时，由于相位延迟片上黑底的存在，使得该液晶显示器显示2维图像时亮度下降。
故，有必要提供一种液晶显示器，以解决现有技术所存在的问题。
 技术问题
本发明的目的在于提供一种液晶显示器,以解决现有技术的液晶显示器在观看3D图像时易产生串扰现象而影响显示质量或观看2维图像时亮度下降的问题。
 技术解决方案
本发明是这样实现的：
一种液晶显示器，包括TFT-LCD模组以及相应的相位延迟片，其中所述TFT-LCD模组和所述相位延迟片之间设置有用于减少在所述相位延迟片上出光的光程差的调光板；所述调光板的折射率大于所述TFT-LCD模组中液晶的折射率；通过同时改变所述调光板的厚度和折射率以减少在所述相位延迟片上出光的光程差；所述调光板的折射率为1.5-1.7；所述调光板上还设置有用于减少串扰现象的黑底板；所述相位延迟片包括0相位波片和λ/2波片的组合或慢轴角度45和135的λ/4波片的组合。
一种液晶显示器，包括TFT-LCD模组以及相应的相位延迟片，其中所述TFT-LCD模组和所述相位延迟片之间设置有用于减少在所述相位延迟片上出光的光程差的调光板。
一种液晶显示器，包括TFT-LCD模组以及相位延迟片，所述相位延迟片是设置于所述TFT-LCD模组上，其特征在于，所述TFT-LCD模组设有用于减少在所述相位延迟片上出光的光程差的调光板。
在本发明的一实施例中，所述调光板的折射率大于所述TFT-LCD模组中液晶的折射率。
在本发明的一实施例中，通过增加所述调光板的厚度以减少在所述相位延迟片上出光的光程差。
在本发明的一实施例中，通过增加所述调光板的折射率以减少在所述相位延迟片上出光的光程差。
在本发明的一实施例中，通过同时改变所述调光板的厚度和折射率以减少在所述相位延迟片上出光的光程差。
在本发明的一实施例中，所述调光板的折射率为1.5-1.7。
在本发明的一实施例中，所述调光板上还设置有用于减少串扰现象的黑底板。
在本发明的一实施例中，所述相位延迟片包括0相位波片和λ/2波片的组合。
在本发明的一实施例中，所述相位延迟片包括慢轴角度45和135的λ/4波片的组合。
 有益效果
相较于现有的液晶显示器具有在观看3D图像时易产生串扰现象而影响显示质量或观看2维图像时亮度下降的问题，本发明的液晶显示器通过在TFT-LCD模组和相位延迟片之间设置有用于减少在相位延迟片上出光的光程差的调光板以减小观看3D图像时的串扰现象，同时减小观看2维图像时的亮度衰减的问题。
 附图说明
图1为现有技术的液晶显示器的结构示意图；
图2为现有技术的液晶显示器的面板信号图；
图3为现有技术的在相位延迟片上设置有黑底的液晶显示器的结构示意图；
图4为本发明的液晶显示器的优选实施例的结构示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
在图中，结构相似的单元是以相同标号表示。
作为本发明的优选实施例，在图4所示的本发明的液晶显示器的优选实施例的结构示意图中，所述液晶显示器100包括TFT-LCD模组110(例如LCD面板)以及相应的相位延迟片120，TFT-LCD模组110上的像素包括左眼信号的像素111以及右眼信号的像素112，左眼信号的像素111通过相位延迟片120的一对应区域来发出偏振信号，右眼信号的像素112使用相位延迟片120的另一对应区域来发出另一偏振信号。本发明的液晶显示器100在TFT-LCD模组110和相位延迟片120之间还设置有调光板130，调光板130用于减少在相位延迟片120上出光的光程差。采用本发明的液晶显示器100时，由于使用了减少在相位延迟片120上出光的光程差的调光板130，因而减少左眼像素或右眼像素的光线进入错误的相位延迟片区域(范围)，避免了串扰现象的产生。
在图4所示的本发明的液晶显示器的优选实施例的结构示意图中，调光板130的折射率大于TFT-LCD模组110中液晶113的折射率。只有在调光板130的折射率大于TFT-LCD模组110中液晶113的折射率的基础上，才能使从液晶113入射到调光板130中的光线的折射角小于入射角，进而使得在相位延迟片120上的出光的光程差减小，避免串扰现象的目的。
本发明的液晶显示器100可以采用以下方式通过改变调光板130的参数以减少在相位延迟片120上出光的光程差。
第一：通过增加所述调光板130的厚度以减少在所述相位延迟片120上出光的光程差。当调光板130的材料为固定时，无法改变调光板130的折射率，由于调光板130的折射率大于TFT-LCD模组110中液晶113的折射率，因此通过增加调光板130的厚度可以减小在相位延迟片120上出光的光程差（增加调光板130厚度也就减少了光从调光板130出射之后，进入相位延迟片120之前在空气中传播的距离），进而避免串扰现象，这种方法可以不受调光板130材料的影响，但是当调光板130材料的折射率较小时，要比较好的消除串扰现象就会较大的增加液晶显示器100的重量。
第二：通过增加所述调光板130的折射率以减少在所述相位延迟片120上出光的光程差。当可以改变调光板130的材料时，可以直接通过改变调光板130的折射率来增大在相位延迟片120上出光的光程差，从而减小同一像素在相位延迟片120上的出光面积，进而避免串扰现象。这种方法通过改变调光板130材料，在原有液晶显示器110结构不变的基础上也可以对串扰现象进行比较好的改善。
第三：通过同时改变所述调光板130的厚度和折射率以减少在所述相位延迟片120上出光的光程差。当调光板130的材料和厚度均可以改变时，在改善串扰现象时，可以进行一种综合的考虑。例如采用一种高折射率的材料的情况下，可以对调光板130的厚度进行一些减少，这样在改善了串扰现象的同时，同时确保了显示质量（如采用本方法过多的改善串扰现象则会由于调光板130的折射造成的画面的变形，影响画面显示质量）。当一定要采用一种较低折射率的材料作为调光板130时，可以通过增加调光板130的厚度抵消由于更换调光板130材料造成的串扰现象的加重。
在图4所示的本发明的液晶显示器的优选实施例的结构示意图中，所述调光板130上还设置有用于减少串扰现象的黑底板（Black Matrix）131。黑底板131设置在液晶面板的调光板130上，为了分离RGB各画素作成的格子状或条纹状的构造，黑底板131也具有预防外部光源造成TFT-LCD模组110误动作的功能，主要以单层铬、低反射铬以及树脂材料为主。本发明的液晶显示器100可以通过调光板130的设置减少黑底板131的设计面积，使得液晶面板的开口率不会因为考虑3D时的串扰现象而降低，但是黑底板131和调光板130的配合使用可以达到最佳的去除串扰现象的效果和保证液晶面板的开口率。
作为本发明的液晶显示器的优选实施例，相位延迟片120为0相位波片和λ/2波片的组合或慢轴角度45和135的λ/4波片的组合。当使用0相位波片和λ/2波片的组合时需搭配一边为水平偏振吸收、另一边为垂直偏振吸收的眼镜才能达成3D影响显示效果。当使用慢轴角度45和135的λ/4波片的组合时需搭配一边为左旋偏振吸收、另一边为右旋偏振吸收的眼睛才能达成3D影响显示效果。用户可以根据需要选择合适的波片组合用来产生左右眼的偏振信号。
下面通过图4所示的本发明的液晶显示器的优选实施例的结构示意图说明本发明的液晶显示器的工作原理。
液晶显示器100包括TFT-LCD模组110、相应的相位延迟片120以及调光板130，TFT-LCD模组110包括左眼信号的像素111、右眼信号的像素112以及液晶113，在调光板130上设置有黑底板131。从图中可以看出，灯管发出的光经过左眼信号的像素111发出的光、液晶113到达调光板130设置有黑底板131的一侧，进入到调光板130，通过整个调光板130后达到相位延迟片120后射出。由于调光板130的折射率n1大于TFT-LCD模组110中液晶113的折射率n2，入射光射入调光板130的入射角为θ1，在调光板130的交界面上发生折射后的折射角为θ2，根据光的折射定律，n1*sin(θ1)=n2*sin(θ2)，光程差OPD减少了[D*tan(θ1)-D*tan(θ2)]，其中D为调光板130的厚度，当n2越大时，θ2越小，光程差OPD也就越小，光就不会进入到错误的范围内引起串扰现象。从图中可以看出我们可以通过改变调光板130的厚度D或者改变调光板130的折射率来控制光程差OPD的减少量。例如液晶113的折射率n1=1.5，调光板130的厚度D=700um，入射角θ1=30度，调光板130的折射率为n2=1.7，则光程差OPD减少了404um-344um=60um，由于液晶113的折射率一般小于1.5，调光板130的折射率一般设置为1.5-1.7的范围为佳。
本发明的液晶显示器100通过改变调光板130的厚度和折射率（即液晶113和相位延迟片120之间的折射率），使得光行进的折射角变小，光程差变短，实现光较少漏到错误的相位延迟片120上，避免了一些串扰现象的发生，同时这样可以将挡光的黑底板设计得面积小些，使得液晶面板的开口率不会因为克服3D显示时的串扰现象而降低很多。
在本发明的另一实施例中，调光板130可设置于TFT-LCD模组110中，用于减少在所述相位延迟片120上出光的光程差。此时，此调光板130可为TFT-LCD模组110的两基板的其中一个，例如为设有彩色滤光片(Color Filter，CF)的玻璃基板。因此，相似于上述说明，可通过改变TFT-LCD模组110的调光板130的参数(如厚度、折射率)，以减少在相位延迟片120上出光的光程差。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
 本发明的实施方式
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Claims (16)

  1. 一种液晶显示器，包括TFT-LCD模组以及相应的相位延迟片，其特征在于，所述TFT-LCD模组和所述相位延迟片之间设置有用于减少在所述相位延迟片上出光的光程差的调光板；所述调光板的折射率大于所述TFT-LCD模组中液晶的折射率；通过同时改变所述调光板的厚度和折射率以减少在所述相位延迟片上出光的光程差；所述调光板的折射率为1.5-1.7；所述调光板上还设置有用于减少串扰现象的黑底板；所述相位延迟片包括0相位波片和λ/2波片的组合或慢轴角度45和135的λ/4波片的组合。
  2. 一种液晶显示器，包括TFT-LCD模组以及相应的相位延迟片，其特征在于，所述TFT-LCD模组和所述相位延迟片之间设置有用于减少在所述相位延迟片上出光的光程差的调光板。
  3. 根据权利要求2所述的液晶显示器，其特征在于，所述调光板的折射率大于所述TFT-LCD模组中液晶的折射率。
  4. 根据权利要求3所述的液晶显示器，其特征在于，通过增加所述调光板的厚度以减少在所述相位延迟片上出光的光程差。
  5. 根据权利要求3所述的液晶显示器，其特征在于，通过增加所述调光板的折射率以减少在所述相位延迟片上出光的光程差。
  6. 根据权利要求3所述的液晶显示器，其特征在于，通过同时改变所述调光板的厚度和折射率以减少在所述相位延迟片上出光的光程差。
  7. 根据权利要求4所述的液晶显示器，其特征在于，所述调光板的折射率为1.5-1.7。
  8. 根据权利要求5所述的液晶显示器，其特征在于，所述调光板的折射率为1.5-1.7。
  9. 根据权利要求6所述的液晶显示器，其特征在于，所述调光板的折射率为1.5-1.7。
  10. 根据权利要求4所述的液晶显示器，其特征在于，所述调光板上还设置有用于减少串扰现象的黑底板。
  11. 根据权利要求5所述的液晶显示器，其特征在于，所述调光板上还设置有用于减少串扰现象的黑底板。
  12. 根据权利要求6所述的液晶显示器，其特征在于，所述调光板上还设置有用于减少串扰现象的黑底板。
  13. 根据权利要求4所述的液晶显示器，其特征在于，所述相位延迟片包括0相位波片和λ/2波片的组合或慢轴角度45和135的λ/4波片的组合。
  14. 根据权利要求5所述的液晶显示器，其特征在于，所述相位延迟片包括0相位波片和λ/2波片的组合或慢轴角度45和135的λ/4波片的组合。
  15. 根据权利要求6所述的液晶显示器，其特征在于，所述相位延迟片包括0相位波片和λ/2波片的组合或慢轴角度45和135的λ/4波片的组合。
  16. 一种液晶显示器，包括TFT-LCD模组以及相位延迟片，所述相位延迟片是设置于所述TFT-LCD模组上，其特征在于，所述TFT-LCD模组设有用于减少在所述相位延迟片上出光的光程差的调光板。
PCT/CN2011/079219 2011-07-04 2011-09-01 液晶显示器 Ceased WO2013004044A1 (zh)

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