WO2016187907A1 - 背光模组和液晶显示器 - Google Patents

背光模组和液晶显示器 Download PDF

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Publication number
WO2016187907A1
WO2016187907A1 PCT/CN2015/081531 CN2015081531W WO2016187907A1 WO 2016187907 A1 WO2016187907 A1 WO 2016187907A1 CN 2015081531 W CN2015081531 W CN 2015081531W WO 2016187907 A1 WO2016187907 A1 WO 2016187907A1
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WIPO (PCT)
Prior art keywords
guide plate
light guide
liquid crystal
collimating
film set
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PCT/CN2015/081531
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English (en)
French (fr)
Inventor
王将峰
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深圳市华星光电技术有限公司
武汉华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司, 武汉华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US14/778,172 priority Critical patent/US20170315284A1/en
Publication of WO2016187907A1 publication Critical patent/WO2016187907A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the invention belongs to the technical field of liquid crystal display, and particularly relates to a backlight module and a liquid crystal display.
  • the light emitted by the backlight is scattered by the dots on the light guide plate, and then emitted from the backlight module at various angles, so that the backlight module has a wide viewing angle range and a wide visible range. It also means that consumers can get a better visual experience in all directions, which is also popular with consumers in many occasions. However, on some occasions, consumers may want a smaller perspective. For example, on an airplane or a high-speed rail, consumers do not want to be seen by neighboring passengers when using mobile phones, tablets or computers to process confidential information. In this case, the backlight module needs to have a smaller viewing angle so that it is facing Consumers on the screen can see the contents of the screen, while passengers in the next seat can't see the contents of the screen.
  • the present invention provides a novel backlight module and a liquid crystal display using the same.
  • a backlight module includes a light guide plate, an optical film set on one side of the light guide plate, and a collimation film set disposed between the light guide plate and the optical film set.
  • the backlight module of the present invention is designed correspondingly to the straight film group, and the light passing through the collimating film group is more concentrated by setting the thickness of the collimating film, the number of layers, and the refractive index of each layer. , thereby reducing the visible range of the backlight module, which can meet the needs of special consumers; on the other hand, by setting a collimating diaphragm
  • the position of the group is used to achieve a good use effect of the alignment film, and at the same time, the assembly is simpler; in addition, the backlight module of the present invention reduces the visible angle of view and makes the light more concentrated, thereby simultaneously improving the backlight mode.
  • the brightness of the group reduces the power consumption of the backlight module.
  • the set of collimating membranes are laminated from a plurality of transparent materials having different refractive indices.
  • the viewing angle of the backlight module can be controlled. The more the number of layers, the greater the difference in refractive index between adjacent layers, and the smaller the viewing angle of the backlight module.
  • the collimating film group includes a light incident surface adjacent to the light guide plate and a light exit surface away from the light guide plate, and the refractive indices of the plurality of transparent material layers sequentially increase in a direction from the light incident surface to the light exit surface.
  • the refractive index of the plurality of transparent material layers is sequentially increased, so that the light is refracted at each transparent material layer and continuously concentrated, thereby reducing The visual range of the backlight module is reduced.
  • the refractive index of the transparent material layer is sequentially increased in the direction from the light entrance surface to the light exit surface. This arrangement allows the refraction of light to be evenly refracted on each layer, resulting in a more uniform light emission and a visual range that provides a more comfortable experience for the consumer.
  • the optical film set includes a plurality of optical films, the set of collimating films being positioned between two of the optical films.
  • the optical film set includes a light incident side adjacent the light guide plate, and the collimated film set is located on a light incident side of the optical film set.
  • the collimating film group is disposed on the light-incident side surface of the optical film group, the setting is simple and convenient, and the installation and fixing of the collimating film group are facilitated, and the operator only needs to adhere the collimating film group to the optical group.
  • the outer surface of the diaphragm group is sufficient.
  • a liquid crystal display according to the present invention includes the above backlight module.
  • a liquid crystal display according to the present invention includes a liquid crystal panel, an optical film set, and a light guide plate disposed in sequence, wherein a collimating film set is disposed between the liquid crystal panel and the optical film set, and the collimating film set is A plurality of transparent materials having different refractive indices are laminated.
  • a collimating film group in the backlight module is applied between the liquid crystal panel and the optical film group, and the collimating film group can be set according to a position suitable for fixing the collimating film group.
  • the application of the collimating diaphragm group reduces the visual range of the liquid crystal display on the one hand, and can meet the needs of special consumers; on the other hand, the position of the collimating diaphragm group is set to achieve a good use effect of the collimating diaphragm.
  • the assembly is made simpler; in addition, the liquid crystal display of the present invention reduces the range of the viewing angle and makes the light more concentrated, thereby simultaneously improving the brightness of the liquid crystal display, thereby reducing the power consumption of the liquid crystal display.
  • the liquid crystal panel includes a first side adjacent the light guide plate, and the set of collimating diaphragms is disposed on the first side. Attaching the collimating film group directly to the first side of the liquid crystal panel makes the assembly operation easier and improves the production efficiency.
  • the optical film set includes a second side that is remote from the light guide plate, and the set of alignment films is disposed on the second side. This arrangement allows the collimating diaphragm set to be placed on the surface of the optical diaphragm set to facilitate the mounting of the collimated diaphragm set.
  • the present invention has the following advantages:
  • the backlight module of the present invention is designed corresponding to the straight film group, and the light passing through the collimating film group is set by setting the thickness of the collimating film group, the number of layers, and the refractive index of each layer. Convergence, thereby reducing the visual range of the backlight module, and meeting the needs of special consumers;
  • the backlight module of the present invention achieves its good use effect by setting the position of the collimating film group, and at the same time makes assembly easier;
  • the backlight module and the liquid crystal display of the present invention since the viewing angle is reduced and the light is concentrated, the brightness of the backlight module and the liquid crystal display is also improved, thereby reducing the power consumption of the backlight module and the liquid crystal display. .
  • FIG. 1 is a schematic structural view of a collimating diaphragm group in a backlight module according to the present invention
  • FIG. 2 is a schematic structural view of a liquid crystal display according to the present invention.
  • FIG. 3 is a schematic view showing the structure of another liquid crystal display according to the present invention.
  • FIG. 1 shows a schematic structural view of a collimating diaphragm group 50 in a backlight module in accordance with the present invention.
  • the collimating film group 50 is formed by stacking a plurality of transparent material layers 51 (only one of which is exemplarily shown) having different refractive indices.
  • the viewing angle of the backlight module can be controlled. The more the number of layers, the greater the difference in refractive index between adjacent layers, and the smaller the viewing angle of the backlight module.
  • the collimating film group 50 includes a light incident surface 52 close to the light guide plate 20 and a light exit surface 53 away from the light guide plate 20.
  • the refractive index of the plurality of transparent material layers 51 is on the self-lighting surface. 52 increases in the direction of the light exit surface 53 in order.
  • the refractive index of each transparent material layer gradually increases from bottom to top, when the light passes through the light incident surface of the collimating film group.
  • the refractive index After being incident on each layer of the transparent material layer 52, the refractive index is sequentially increased, so that the light is refracted at each transparent material layer and continuously concentrated, thereby reducing the visible range of the backlight module. It can be understood that, if the refractive index of each transparent material layer 51 gradually decreases from bottom to top, the light diverges after being refracted at each transparent material layer, and therefore, according to the technical suggestion of the present invention, the present invention can also be used to increase The visible range of the backlight module.
  • the refractive index of the transparent material layer 51 is sequentially increased in the same direction from the light incident surface 52 to the light exit surface 53. This arrangement allows the refraction of light to be evenly refracted on each layer, allowing light to be more evenly emitted, and its visual range provides a more comfortable experience for the consumer.
  • the backlight module of the liquid crystal display 100 includes a light guide plate 20, an optical film group 30 on the side of the light guide plate 20, and a collimating film group 50 disposed between the light guide plate 20 and the optical film group 30.
  • the backlight module of the present invention is designed on the one hand to align the straight film set 50, and the light emitted by the light source 10 passes through the standard by setting the thickness of the collimating film group 50, the number of layers, and the refractive index of each layer.
  • the straight film group 50 is further concentrated, thereby reducing the visible range of the backlight module, and can meet the needs of special consumers; on the other hand, by setting the position of the collimating film group 50, the collimating film group 50 is good.
  • the use effect of the invention is simpler in assembly; in addition, the backlight module of the present invention reduces the visible angle of view and makes the light more concentrated, thereby simultaneously improving the brightness of the backlight module, thereby reducing the backlight module. Power consumption.
  • the optical film set 30 includes a plurality of optical films (only exemplarily shown in the drawings, not specifically shown), and two of the collimating film sets 50 are located therein. Between optical films.
  • the collimating film group 50 By arranging the collimating film group 50 in the optical film group, the collimating film group 50 and the optical film group 30 are integrated into one body, and the integrated structure is advantageous for the installation of the backlight module.
  • the optical film group 30 includes a light incident side close to the light guide plate 20, and the collimated film group is located on the light incident side of the optical film group 30.
  • the collimating film group 50 is disposed on the light incident side surface 31 of the optical film group 30. The setting is simple and convenient, which facilitates the installation and fixing of the collimating film group, and the operator only needs to set the collimating film group 50. It is sufficient to adhere to the surface 31 of the optical film group.
  • Fig. 3 shows a schematic structural view of a liquid crystal display 100' provided in accordance with the present invention.
  • the liquid crystal display 100' includes a liquid crystal panel 70', an optical film set 30' and a light guide plate 20' disposed in sequence, wherein a collimating film set 50' is disposed between the liquid crystal panel 70' and the optical film set 30'.
  • the collimating film group 50' has the same properties as the above-described collimating film group 50.
  • the light emitted by the light source 10' is more concentrated after passing through the collimating film group 50', thereby reducing the visible range of the liquid crystal display 100'.
  • the liquid crystal panel 70' includes a first face 71' adjacent to the light guide plate, and the collimated film set 50' is disposed on the first face 71'. Attaching the collimating film group 50' directly to the first face 71' of the liquid crystal panel makes the assembly operation simpler and improves the production efficiency.
  • the optical film set 30' includes a second face 31' remote from the light guide plate 20', and the collimated film set 50' is disposed on the second face 31'. This arrangement places the collimating film set 50' on the surface of the optical film set 30' to facilitate the mounting of the collimating film set 50'.
  • the collimating film group can be specifically set according to the position where the collimating film group is suitable for fixing, and is not limited to the setting position of the above-mentioned collimating film group.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

提供背光模组和液晶显示器（100）。背光模组包括导光板（20）、位于导光板（20）一侧的光学膜片组（30），以及设置于导光板（20）和光学膜片组（30）之间的准直膜片组（50）。通过对准直膜片组（50）进行相应的设计，如设计其厚度、层数以及各层的折射率等来减小背光模组的可视范围，以满足特殊消费者的需求；另一方面通过设置准直膜片组（50）的位置来使其装配更方便；另外，由于光线更汇聚，因此提高了背光模组的亮度的同时降低了功耗。

Description

背光模组和液晶显示器
相关申请的交叉引用
本申请要求享有于2015年5月22日提交的名称为“背光模组和液晶显示器”的中国专利申请CN201510268782.1的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本发明属于液晶显示技术领域，具体涉及背光模组和液晶显示器。
背景技术
现有的背光模组中，通常背光源发出的光经导光板上的网点散射后，以各个角度从背光模组中射出，因此背光模组的可视角范围较广，较广的可视范围也意味着消费者在各个方向上都可以获得较好的视觉感受，这在很多场合也颇受消费者的欢迎。然而，在有些场合，消费者可能希望视角小一些。例如，在飞机或高铁上，消费者在使用手机、平板或电脑处理机密信息时，不希望被邻座的乘客看到，这时就需要背光模组的可视角小一些，以便使正对着屏幕的消费者能够看清屏幕的内容，而邻座的乘客看不到屏幕的内容。
针对上述技术存在的问题，希望寻求一种具有较小可视角的背光模组，以满足特殊消费者的需求，从而解决现有技术中的不足之处。
发明内容
为了进一步满足特殊消费者对背光模组可视角的要求，本发明提供了一种新型背光模组以及应用该背光模组的液晶显示器。
根据本发明提供的一种背光模组，包括导光板、位于导光板一侧的光学膜片组，以及设置于导光板和光学膜片组之间的准直膜片组。
本发明的背光模组一方面对准直膜片组进行了相应的设计，通过设置准直膜片的厚度、层数以及各层的折射率，使通过该准直膜片组的光更汇聚，从而减小背光模组的可视范围，能够满足特殊消费者的需求；另一方面通过设置准直膜片 组的位置来达到准直膜片良好的使用效果，同时使其装配更简单；另外，本发明的背光模组中由于减小了可视角，使光线更为汇聚，因此也同时提高了背光模组的亮度，从而降低了背光模组的功耗。
在一些实施方案中，准直膜片组由具有不同折射率的多个透明材料层叠置制成。通过控制不同透明材料层的折射率以及层数，可以控制背光模组的可视角度。层数越多，相邻层的折射率差异越大，背光模组的可视角就越小。
在一些实施方案中，准直膜片组包括靠近导光板的入光面和远离导光板的出光面，多个透明材料层的折射率在自入光面至出光面的方向上依次增加。当光线经准直膜片组的入光面入射并经过各层透明材料层后，由于多个透明材料层的折射率依次增加，使光线在各个透明材料层处发生折射并不断汇聚，从而减小了背光模组的可视范围。优选地，透明材料层的折射率在自入光面至出光面的方向上依次等值增加。这种设置使光线的折射在每层上都发生均匀的折射，使得光线出射更为均匀，其可视范围可带给消费者较为舒适的体验。
在一些实施方案中，光学膜片组包括多个光学膜片，准直膜片组位于其中的两个光学膜片之间。通过将准直膜片组设置于光学膜片组中，使准直膜片组与光学膜片组组装成为一体，其一体式结构有利于背光模组的安装。
在一些实施方案中，光学膜片组包括靠近导光板的入光侧，准直膜片组位于光学膜片组的入光侧。优选将准直膜片组设置于光学膜片组的入光侧的表面，该设置简单方便，利于准直膜片组的安装与固定，操作人员只需将准直膜片组粘附在光学膜片组的外表面即可。
根据本发明提供的一种液晶显示器，包括上述背光模组。
根据本发明提供的一种液晶显示器，包括依次设置的液晶面板、光学膜片组和导光板，其中，液晶面板与光学膜片组之间设置有准直膜片组，准直膜片组由具有不同折射率的多个透明材料层叠置制成。
本发明的液晶显示器中在液晶面板与光学膜片组之间应用了上述背光模组中的准直膜片组，可根据准直膜片组适合固定的位置来设置准直膜片组，该准直膜片组的应用一方面减小了液晶显示器的可视范围，可以满足特殊消费者的需求；另一方面通过设置准直膜片组的位置来达到准直膜片良好的使用效果，同时使其装配更简单；另外，本发明的液晶显示器中由于减小了可视角范围，使光线更为汇聚，因此也同时提高了液晶显示器的亮度，从而降低了液晶显示器的功耗。
在一些实施方案中，液晶面板包括靠近导光板的第一面，准直膜片组设置在第一面上。将准直膜片组直接贴附在液晶面板的第一面使装配操作更为简便，提高了生产效率。
在一些实施方案中，光学膜片组包括远离导光板的第二面，准直膜片组设置在第二面上。该设置将准直膜片组设置在光学膜片组的表面可方便准直膜片组的安装。
与现有技术相比，本发明具有以下优点：
1)本发明的背光模组对准直膜片组进行了相应的设计，通过设置准直膜片组的厚度、层数以及各层的折射率，使通过该准直膜片组的光更汇聚，从而减小背光模组的可视范围，能够满足特殊消费者的需求；
2)本发明的背光模组通过设置准直膜片组的位置来达到其良好的使用效果，同时使其装配更简单；
3)本发明的背光模组和液晶显示器中由于减小了可视角，光线更为汇聚，因此也同时提高了背光模组和液晶显示器的亮度，从而降低了背光模组和液晶显示器的功耗。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1是根据本发明的背光模组中的准直膜片组的结构示意图；
图2是根据本发明的一种液晶显示器的结构示意图；
图3是根据本发明的另一种液晶显示器的结构示意图。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例绘制。
具体实施方式
下面将结合附图对本发明作进一步说明。
这里所介绍的细节是示例性的，并仅用来对本发明的实施例进行例证性讨论，它们的存在是为了提供被认为是对本发明的原理和概念方面的最有用和最易理解的描述。关于这一点，这里并没有试图对本发明的结构细节作超出于基本理解本发明所需的程度的介绍，本领域的技术人员通过说明书及其附图可以清楚地理解如何在实践中实施本发明的几种形式。
图1显示了根据本发明的背光模组中的准直膜片组50的结构示意图。如图1所示，准直膜片组50由具有不同折射率的多个透明材料层51(图中仅示例性标出其中的一个)叠置制成。通过控制不同透明材料层51的折射率以及层数，可以控制背光模组的可视角度。层数越多，相邻层的折射率差异越大，背光模组的可视角就越小。
优选地，结合图1和图2，准直膜片组50包括靠近导光板20的入光面52和远离导光板20的出光面53，多个透明材料层51的折射率在自入光面52至出光面53的方向上依次增加。例如，如图1所示的准直膜片组50中以四层透明材料层为例，各透明材料层的折射率自下而上逐渐增加，当光线经准直膜片组的入光面52入射并经过各层透明材料层后，由于折射率依次增加，使光线在各个透明材料层处发生折射并不断汇聚，从而减小了背光模组的可视范围。可以理解的是，若各透明材料层51的折射率自下而上逐渐减小时，光线在各个透明材料层处发生折射后不断发散，因此依据本发明的技术启示，本发明还可用于增大背光模组的可视范围。
还优选地，透明材料层51的折射率在自入光面52至出光面53的方向上依次等值增加。这种设置使光线的折射在每层上都发生均匀的折射，可使光线出射更为均匀，其可视范围可带给消费者较为舒适的体验。
图2显示了应用上述准直膜片组50的液晶显示器100的结构示意图。该液晶显示器100的背光模组包括导光板20、位于导光板20一侧的光学膜片组30，以及设置于导光板20和光学膜片组30之间的准直膜片组50。
本发明的背光模组一方面对准直膜片组50进行了相应的设计，通过设置准直膜片组50的厚度、层数以及各层的折射率，使光源10发出的光通过该准直膜片组50后更汇聚，从而减小背光模组的可视范围，能够满足特殊消费者的需求；另一方面通过设置准直膜片组50的位置来达到准直膜片组50良好的使用效果，同时使其装配更简单；另外，本发明的背光模组中由于减小了可视角，使光线更为汇聚，因此也同时提高了背光模组的亮度，从而降低了背光模组的功耗。
如图2所示的实施例中，光学膜片组30包括多个光学膜片(图中仅示例性标出，并未具体画出多个)，准直膜片组50位于其中的两个光学膜片之间。通过将准直膜片组50设置于光学膜片组中，使准直膜片组50与光学膜片组30配合成为一体，其一体式结构有利于背光模组的安装。
另外，光学膜片组30包括靠近导光板20的入光侧，准直膜片组位于光学膜片组30的入光侧。优选将准直膜片组50设置于光学膜片组30的入光侧的表面31，该设置简单方便，利于准直膜片组的安装与固定，操作人员只需将准直膜片组50粘附在光学膜片组的表面31即可。
图3显示了根据本发明提供的液晶显示器100’的结构示意图。该液晶显示器100’包括依次设置的液晶面板70’、光学膜片组30’和导光板20’，其中，液晶面板70’与光学膜片组30’之间设置有准直膜片组50’，该准直膜片组50’与上述准直膜片组50具有相同的性质。由光源10’发出的光经准直膜片组50’后更为汇聚，从而缩小了液晶显示器100’的可视范围。
优选地，液晶面板70’包括靠近导光板的第一面71’，准直膜片组50’设置在第一面71’上。将准直膜片组50’直接贴附在液晶面板的第一面71’使装配操作更为简便，提高了生产效率。
还优选地，光学膜片组30’包括远离导光板20’的第二面31’，准直膜片组50’设置在第二面31’上。该设置将准直膜片组50’设置在光学膜片组30’的表面利于准直膜片组50’的安装。
可以理解的是，在本发明中，可根据准直膜片组适合固定的位置来具体设置准直膜片组，而并不仅限于上述准直膜片组的设置位置。
应注意的是，前面所述的例子仅以解释为目的，而不能认为是限制了本发明。虽然已经根据示例性实施例对本发明进行了描述，然而应当理解，这里使用的是描述性和说明性的语言，而不是限制性的语言。在当前所述的和修改的所附权利要求的范围内，在不脱离本发明的范围和精神的范围中，可以对本发明进行改变。尽管这里已经根据特定的方式、材料和实施例对本发明进行了描述，但本发明并不仅限于这里公开的细节；相反，本发明可扩展到例如在所附权利要求的范围内的所有等同功能的结构、方法和应用。

Claims (20)

  1. 一种背光模组，包括：
    导光板，
    位于所述导光板一侧的光学膜片组，以及
    设置于所述导光板和所述光学膜片组之间的准直膜片组。
  2. 根据权利要求l所述的背光模组，其中，所述准直膜片组由多个具有不同折射率的透明材料层叠置制成。
  3. 根据权利要求2所述的背光模组，其中，所述准直膜片组包括靠近所述导光板的入光面和远离所述导光板的出光面，多个所述透明材料层的折射率在自所述入光面至所述出光面的方向上依次增加。
  4. 根据权利要求l所述的背光模组，其中，所述光学膜片组包括多个光学膜片，所述准直膜片组位于其中的两个所述光学膜片之间。
  5. 根据权利要求2所述的背光模组，其中，所述光学膜片组包括多个光学膜片，所述准直膜片组位于其中的两个所述光学膜片之间。
  6. 根据权利要求3所述的背光模组，其中，所述光学膜片组包括多个光学膜片，所述准直膜片组位于其中的两个所述光学膜片之间。
  7. 根据权利要求l所述的背光模组，其中，所述光学膜片组包括靠近所述导光板的入光侧，所述准直膜片组位于所述光学膜片组的入光侧。
  8. 根据权利要求2所述的背光模组，其中，所述光学膜片组包括靠近所述导光板的入光侧，所述准直膜片组位于所述光学膜片组的入光侧。
  9. 根据权利要求3所述的背光模组，其中，所述光学膜片组包括靠近所述导光板的入光侧，所述准直膜片组位于所述光学膜片组的入光侧。
  10. 一种液晶显示器，包括背光模组，所述背光模组包括：
    导光板，
    位于所述导光板一侧的光学膜片组，以及
    设置于所述导光板和所述光学膜片组之间的准直膜片组。
  11. 根据权利要求10所述的液晶显示器，其中，所述准直膜片组由多个具有不同折射率的透明材料层叠置制成。
  12. 根据权利要求11所述的液晶显示器，其中，所述准直膜片组包括靠近 所述导光板的入光面和远离所述导光板的出光面，多个所述透明材料层的折射率在自所述入光面至所述出光面的方向上依次增加。
  13. 根据权利要求10所述的液晶显示器，其中，所述光学膜片组包括多个光学膜片，所述准直膜片组位于其中的两个所述光学膜片之间。
  14. 根据权利要求10所述的液晶显示器，其中，所述光学膜片组包括靠近所述导光板的入光侧，所述准直膜片组位于所述光学膜片组的入光侧。
  15. 一种液晶显示器，包括依次设置的液晶面板、光学膜片组和导光板，其中，所述液晶面板与所述光学膜片组之间设置有准直膜片组，所述准直膜片组由多个具有不同折射率的透明材料层叠置制成。
  16. 根据权利要求15所述的液晶显示器，其中，所述准直膜片组包括靠近所述导光板的入光面和远离所述导光板的出光面，多个所述透明材料层的折射率在自所述入光面至所述出光面的方向上依次增加。
  17. 根据权利要求15所述的液晶显示器，其中，所述液晶面板包括靠近所述导光板的第一面，所述准直膜片组设置在所述第一面上。
  18. 根据权利要求16所述的液晶显示器，其中，所述液晶面板包括靠近所述导光板的第一面，所述准直膜片组设置在所述第一面上。
  19. 根据权利要求15所述的液晶显示器，其中，所述光学膜片组包括远离所述导光板的第二面，所述准直膜片组设置在所述第二面上。
  20. 根据权利要求16所述的液晶显示器，其中，所述光学膜片组包括远离所述导光板的第二面，所述准直膜片组设置在所述第二面上。
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