WO2013063825A1 - 背光结构及包含有该背光结构的液晶显示器 - Google Patents

背光结构及包含有该背光结构的液晶显示器 Download PDF

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Publication number
WO2013063825A1
WO2013063825A1 PCT/CN2011/082079 CN2011082079W WO2013063825A1 WO 2013063825 A1 WO2013063825 A1 WO 2013063825A1 CN 2011082079 W CN2011082079 W CN 2011082079W WO 2013063825 A1 WO2013063825 A1 WO 2013063825A1
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WIPO (PCT)
Prior art keywords
light
plate
emitting surface
bar
reflective
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PCT/CN2011/082079
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English (en)
French (fr)
Inventor
萧宇均
杨瑞连
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深圳市华星光电技术有限公司
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Priority to US13/377,548 priority Critical patent/US8814413B2/en
Publication of WO2013063825A1 publication Critical patent/WO2013063825A1/zh

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    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a backlight structure and a liquid crystal display including the same.
  • the commonly used light source is a cold cathode fluorescent tube (CCFL, Cold Cathode). Fluorescent Lamp) or a light-emitting diode (LED) matrix.
  • CCFL is harmful to the environment because it contains mercury. It is gradually eliminated.
  • the number of LEDs needed in a backlight module is relatively high, and the heat generated by it will reduce the display effect of the backlight module. Therefore, a special heat dissipation mechanism is required, but a large number of LEDs and a heat dissipation mechanism are not conducive to cost reduction.
  • the point light source is usually converted into a line light source, specifically, a light source is added at both ends of the light guide tube, and the light guide tube does not need to emit light.
  • the surface is plated with a metal reflective layer, and the diffuse reflection of the reflective layer breaks the total reflection of the light in the light guide tube, so that the light is uniformly emitted from the surface of the light guide tube that needs to emit light.
  • this technique is relatively expensive because it requires a metal reflective film on the surface of the light pipe.
  • a main object of the present invention is to provide a backlight structure and a liquid crystal display including the same, which can improve light utilization efficiency and reduce manufacturing cost.
  • the present invention provides a backlight structure including a light bar having a light emitting surface, and a light emitting surface of the light bar is provided with a first means for destroying total reflection of light in the light bar microstructure.
  • the backlight structure further comprises a layer of fluorescent material coated on a surface of the first microstructure.
  • the light bar is made of polymethyl methacrylate PMMA or SiO 2 , and the light bar further has a non-light-emitting surface opposite to the light-emitting surface, and the non-light-emitting surface is provided with a reflective structure.
  • the reflective structure comprises a reflective sheet or a reflective film
  • the non-light-emitting surface is provided with a second microstructure
  • the reflective sheet or the reflective film is attached to the second microstructure of the non-light-emitting surface
  • the second microstructure is a protrusion formed on an outer surface of the non-light-emitting surface, the protrusion having a hemispherical shape, a rhombus shape or a semi-elliptical shape.
  • the first microstructure is a groove formed on an outer surface of the light-emitting surface, the groove having a hemispherical shape, a rhombus shape or a semi-elliptical shape.
  • the light bar has a circular or elliptical cross section; or the light bar has a fan-shaped cross section, and the fan-shaped curved surface is a non-light-emitting surface of the light bar, the sector-shaped The two straight sides are the light exiting surface of the light bar.
  • the backlight structure further comprises light source coupling means for providing light to the light bar, the light source coupling means being disposed on one or both sides of the light bar.
  • the backlight structure further includes a back plate, a reflection plate, a diffusion plate and an optical film
  • the back plate has a bottom plate and a side plate
  • the reflection plate is disposed on a bottom plate of the back plate
  • the diffusion plate and The optical film is disposed above the reflecting plate in order from bottom to top, and a plurality of the light bars are disposed between the reflecting plate and the diffusing plate.
  • the backlight structure further includes a back plate, a reflective plate, a light guide plate and an optical film
  • the back plate has a bottom plate and a side plate
  • the reflective plate is disposed on the bottom plate of the back plate
  • the light guide plate and The optical film is disposed above the reflective plate in order from bottom to top
  • the light bar is disposed between the side plate of the back plate and the light incident surface of the light guide plate, and the light emitting surface of the light bar is The light incident surface of the light guide plate is opposite.
  • the invention also provides a liquid crystal display comprising a backlight module, the backlight module comprising a backlight structure as described above.
  • the backlight structure and the liquid crystal display comprising the same break the total reflection of light in the light bar by making a microstructure on the surface of the light bar that needs to be lighted, so that the light is uniformly emitted from the light bar.
  • a reflective structure is arranged on the non-light-emitting surface of the light bar, thereby improving the utilization of light and reducing the manufacturing cost.
  • coating the fluorescent material on the light-emitting surface of the light bar improves the color saturation of the display screen of the liquid crystal display.
  • FIG. 1 is a schematic structural view of a first embodiment of a backlight structure of the present invention
  • FIG. 2 is a schematic view showing an assembly structure of a lamp bar and a light source coupling device in a first embodiment of the backlight structure of the present invention
  • FIG. 3 is a schematic view showing another assembly structure of a lamp bar and a light source coupling device in a first embodiment of the backlight structure of the present invention
  • FIG. 4 is a schematic cross-sectional view of a light bar provided with a first microstructure in a first embodiment of the backlight structure of the present invention
  • Figure 5 is a perspective view of the three-dimensional structure of the light bar with the first microstructure shown in Figure 4;
  • FIG. 6 is a schematic cross-sectional view of a light bar provided with a reflective structure in a first embodiment of the backlight structure of the present invention
  • FIG. 7 is a schematic view showing the optical path of a light bar provided with a second microstructure in the first embodiment of the backlight structure of the present invention.
  • Figure 8 is a cross-sectional view showing a lamp bar in a second embodiment of the backlight structure of the present invention.
  • Figure 9 is a schematic view showing the structure of a third embodiment of the backlight structure of the present invention.
  • FIG. 1 is a schematic structural view of a first embodiment of a backlight structure of the present invention.
  • the first embodiment of the present invention provides a backlight structure as a side-into-light backlight structure, including a back plate 1, a reflector 3, a light guide plate 4, an optical film 5, a light bar 2, and a light source coupling device (not shown) Out), where:
  • the back plate 1 has a bottom plate 11 and a side plate 12, and the reflection plate 3 is disposed on the bottom plate 22 of the back plate 2.
  • the light guide plate 4 and the optical film 5 are sequentially disposed above the reflection plate 3 from bottom to top, and the light guide plate 4 includes a bottom surface. (not shown in the figure), the light incident surface 41 and the light exit surface opposite to the bottom surface (not shown).
  • the light bar 2 is disposed between the side plate 12 of the back plate 1 and the light incident surface 41 of the light guide plate 4.
  • the light bar 2 has a circular or elliptical cross section.
  • the light bar 2 has a light-emitting surface 21 and a non-light-emitting surface 22, and the light-emitting surface 21 of the light-rod 2 is disposed opposite to the light-incident surface 41 of the light guide plate 4.
  • the non-light-emitting surface 22 is provided with a reflective structure 24.
  • FIG. 2 is a schematic view showing an assembly structure of the light bar 2 and the light source coupling device 6 in the first embodiment of the backlight structure of the present invention.
  • the light source coupling device 6 can be disposed on one side of the light bar 2 while The other side of the light bar 2 is provided with a reflection sheet 7; in addition, the above-mentioned light source coupling device 6 may also be disposed on both sides of the light bar 2, as shown in FIG. 3, and FIG. 3 is a light bar in the first embodiment of the backlight structure of the present invention.
  • 2 is another schematic diagram of the assembly structure of the light source coupling device 6.
  • the difference between the two assembly structures of the light bar 2 shown in Figs. 2 and 3 and the light source coupling device 6 is that the former has only one light source and the latter has two light sources.
  • the latter can be used in backlight modules that require relatively high or large brightness.
  • the light source coupling device 6 in this embodiment is for coupling light to the light bar 2 to provide light to the light bar 2.
  • the light source coupling device 6 may include, for example, a high power LED lamp, a xenon lamp, or other light source commonly used in the industry.
  • FIG. 4 is a schematic cross-sectional view of a light bar provided with a first microstructure in a first embodiment of the backlight structure of the present invention
  • FIG. 5 is a perspective view of the light bar with a first microstructure shown in FIG. Schematic.
  • the present embodiment is provided with a first microstructure 23 for destroying the total reflection of light in the lamp bar 2 on the light-emitting surface of the lamp bar 2.
  • the first microstructure 23 is a groove formed on the outer surface of the light-emitting surface of the light bar 2, and may have a hemispherical shape, a rhombus shape, a semi-elliptical shape or the like.
  • FIG. 6 is a schematic cross-sectional view of a lamp bar provided with a reflective structure in a first embodiment of the backlight structure of the present invention.
  • the material of the light bar 2 can be high purity PMMA (polymethyl methacrylate, Polymethyl)
  • a material such as Methacrylate or SiO2 (silica) is provided with a reflective structure 24 on the non-light-emitting surface 22 of the light bar 2 opposite to the light-emitting surface 21, and the reflective structure 24 may be The reflective sheet or the reflective film, the reflective sheet or the reflective film is bonded to the non-light-emitting surface 22 of the light rod 2.
  • the non-light-emitting surface 22 of the light rod 2 to which the reflective sheet or the reflective film is to be attached is first placed.
  • a rough surface is formed, and then a reflective sheet or a reflective coating is attached to the rough surface to enhance the reflection effect of light.
  • a second microstructure 221 (shown in FIG. 7) may be disposed on the surface of the non-light-emitting surface 22 of the light bar 2, and the second microstructure 221 is formed on the outer surface of the non-light-emitting surface 22 of the light bar 2.
  • the protrusions thereby form a rough surface of the non-light-emitting surface 22 of the light bar 2, and the cross-section of the protrusions may be hemispherical, rhombic or semi-elliptical or other shapes.
  • FIG. 7 is a schematic diagram of the optical path of the light bar provided with the second microstructure in the first embodiment of the backlight structure of the present invention, thereby causing the light to be
  • the light bar 2 performs total reflection in other places, and can increase the light utilization rate according to design requirements.
  • the embodiment can also apply a corresponding fluorescent material layer 25 to the opening of the light bar 2 and the outer surface of the first microstructure 23 in combination with the light source. As shown in FIG. 4, the color of the display screen of the liquid crystal display can be improved. saturation.
  • the above structure can uniformly emit light from the light bar, thereby improving the utilization of light and reducing the manufacturing cost.
  • coating the fluorescent material on the light-emitting surface of the light bar improves the color saturation of the display screen of the liquid crystal display.
  • FIG. 8 is a schematic cross-sectional view of a lamp bar in a second embodiment of the backlight structure of the present invention.
  • the cross-sectional shape of the light bar 102 in the embodiment is a fan shape, and the curved surface of the fan shape is a non-light-emitting surface of the light bar; the two straight sides of the fan shape are the light bar 102.
  • the above structure can well control the light exiting angle of the light in the light bar, so that the light is incident into the light guide plate 4 as much as possible.
  • the first microstructure 123 is also provided on the light-emitting surface of the light bar 2, that is, the straight side of the fan shape, and the fluorescent material layer 125 is provided on the surface of the first microstructure 123. Others are the same as the first embodiment.
  • FIG. 9 is a schematic structural view of a third embodiment of the backlight structure of the present invention.
  • the first embodiment is a side-lit backlight structure
  • the embodiment is a direct-lit backlight structure, the same type of direct-lit backlight module and a side-into-light backlight module.
  • the main difference of the group is that the direct-lit backlight module can make the module lightweight, and the side-into-light backlight module can make the module thinner.
  • the backlight structure of the embodiment includes a back plate 201, a reflection plate 203, a diffusion plate 204, an optical film 205, and a light bar 202.
  • the back plate 201 has a bottom plate and a side plate, and the reflection plate 203 is disposed on the bottom plate of the back plate 201, and the diffusion plate 204 and the optical film 205 are disposed above the reflecting plate 203 in order from bottom to top, and a plurality of light bars 202 are disposed between the reflecting plate 203 and the diffusing plate 204.
  • the light bar 202 is also equipped with a corresponding light source coupling device.
  • the present invention also provides a liquid crystal display including a backlight module, which may include the backlight structure in the above embodiments.
  • a backlight module which may include the backlight structure in the above embodiments.
  • the backlight structure of the present invention and the liquid crystal display including the backlight structure break the total reflection of light in the light bar by making a microstructure on the surface of the light bar that needs to be lighted, so that the light is uniformly emitted from the light bar, and at the same time, the light bar
  • the non-light-emitting surface is provided with a reflective structure, which improves the utilization of light and reduces the manufacturing cost.
  • coating the fluorescent material on the light-emitting surface of the light bar improves the color saturation of the display screen of the liquid crystal display.

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Abstract

提供了一种背光结构及包含有该背光结构的液晶显示器，该背光结构包括灯棒（2），灯棒（2）具有出光面（21），灯棒（2）的出光面（21）上设有用于破坏灯棒（2）内的光线的全反射的第一微结构（23）。通过在灯棒（2）需要出光的表面做微结构来打破光线在灯棒（2）内的全反射，使光线从灯棒（2）内均匀射出，同时在灯棒（2）的非出光面（22）设置反射结构（24），提高了光线的利用率，降低了制造成本。另外，在灯棒（2）的出光面（21）上涂布荧光材料（25），提高了液晶显示器的显示屏的色彩饱和度。

Description

背光结构及包含有该背光结构的液晶显示器
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种背光结构及包含有该背光结构的液晶显示器。
背景技术
目前的液晶显示背光模组中，通常采用的光源有冷阴极萤光灯管（CCFL，Cold Cathode Fluorescent Lamp）或者发光二极管（LED）矩阵等。其中，CCFL因为含有汞元素，对环境有害，逐渐被淘汰；对于LED矩阵的光源，一个背光模组中需要用到的LED的数量比较多，其产生的热量会降低背光模组的显示效果，因此，需要采取专门的散热机制，但是，多数量的LED以及散热机制则不利于成本的降低。
另外，在现有技术中，为了实现光源的出光均匀性以及提高光线的利用率，通常把点光源转换成线光源，具体是在导光管的两端加点光源，导光管不需要出光的面镀金属反射层，利用反射层的漫反射打破光线在导光管内的全反射，从而实现光线从导光管需要出光的面均匀射出。但是，此种技术由于需要在导光管的表面镀金属反射膜，因此成本比较高。
发明内容
本发明的主要目的在于提供一种背光结构及包含有该背光结构的液晶显示器，可以提高光的利用率，并降低制造成本。
为了达到上述目的，本发明提出一种背光结构，包括灯棒，所述灯棒具有出光面，所述灯棒的出光面上设有用于破坏所述灯棒内的光线的全反射的第一微结构。
优选地，该背光结构还包括荧光材料层，所述荧光材料层涂布在所述第一微结构的表面。
优选地，所述灯棒为聚甲基丙烯酸甲酯PMMA或SiO2材质，所述灯棒还具有与所述出光面相对的非出光面，所述非出光面上设有反射结构。
优选地，所述反射结构包括反射片或反射膜，所述非出光面上设有第二微结构，所述反射片或反射膜贴附于所述非出光面的第二微结构上；所述第二微结构是形成于所述非出光面的外表面的凸起，该凸起的横截面为半球形、菱形或者半椭圆形。
优选地，所述第一微结构是形成于所述出光面的外表面的凹槽，该凹槽的横截面为半球形、菱形或者半椭圆形。
优选地，所述灯棒的横截面为圆形或椭圆形；或者，所述灯棒的横截面为扇形，所述扇形的弧形面为所述灯棒的非出光面，所述扇形的两条直边为所述灯棒的出光面。
优选地，该背光结构还包括用于向所述灯棒提供光线的光源耦合装置，所述光源耦合装置设置在所述灯棒的一侧或两侧。
优选地，该背光结构还包括背板、反射板、扩散板及光学膜片，所述背板具有底板及侧板，所述反射板设置在所述背板的底板上，所述扩散板及光学膜片从下至上依次设置在所述反射板的上方，若干所述灯棒设置在所述反射板与扩散板之间。
优选地，该背光结构还包括背板、反射板、导光板及光学膜片，所述背板具有底板及侧板，所述反射板设置在所述背板的底板上，所述导光板及光学膜片从下至上依次设置在所述反射板的上方，所述灯棒设置在所述背板的侧板与导光板的入光面之间，且所述灯棒的出光面与所述导光板的入光面相对。
本发明还提出一种液晶显示器，包括背光模组，所述背光模组包括如上所述的背光结构。
本发明提出的一种背光结构及包含有该背光结构的液晶显示器，通过在灯棒需要出光的表面做微结构来打破光线在灯棒内的全反射，从而使光线从灯棒内均匀射出，同时在灯棒的非出光面设置反射结构，提高了光线的利用率，同时降低了制造成本，另外，在灯棒出光面上涂布荧光材料，提高了液晶显示器的显示屏的色彩饱和度。
附图说明
图1是本发明背光结构第一实施例的结构示意图；
图2是本发明背光结构第一实施例中灯棒与光源耦合装置的一种装配结构示意图；
图3是本发明背光结构第一实施例中灯棒与光源耦合装置的另一种装配结构示意图；
图4是本发明背光结构第一实施例中设有第一微结构的灯棒截面示意图；
图5是图4所示的带有第一微结构的灯棒立体结构示意图；
图6是本发明背光结构第一实施例中设有反射结构的灯棒截面示意图；
图7是本发明背光结构第一实施例中设有第二微结构的灯棒的光路原理示意图；
图8是本发明背光结构第二实施例中的灯棒截面示意图；
图9是本发明背光结构第三实施例的结构示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
以下将结合附图及实施例，对实现发明目的的技术方案作详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
请参照图1所示，图1是本发明背光结构第一实施例的结构示意图。本发明第一实施例提出一种背光结构为侧入光式背光结构，其包括背板1、反射板3、导光板4、光学膜片5、灯棒2以及光源耦合装置（图中未示出），其中：
背板1具有底板11及侧板12，上述反射板3设置在背板2的底板22上，导光板4及光学膜片5从下至上依次设置在反射板3的上方，导光板4包括底面（图中未标出）、入光面41及与底面相对的出光面（图中未标出）。
灯棒2设置在背板1的侧板12与导光板4的入光面41之间，本实施例中灯棒2的横截面为圆形或椭圆形。该灯棒2具有出光面21及非出光面22，灯棒2的出光面21与导光板4的入光面41相对设置。非出光面22上设有反射结构24。
如图2所示，图2是本发明背光结构第一实施例中灯棒2与光源耦合装置6的一种装配结构示意图，上述光源耦合装置6可以设置在灯棒2的一侧，同时在灯棒2的另一侧设置反射片7；此外，上述光源耦合装置6也可以设置在灯棒2的两侧，如图3所示，图3是本发明背光结构第一实施例中灯棒2与光源耦合装置6的另一种装配结构示意图。
上述图2及图3所示的灯棒2与光源耦合装置6的两种装配结构的区别在于，前者只有一个光源，后者有两个光源。后者可以用在需要亮度比较高或者大尺寸的背光模组中。
本实施例中的光源耦合装置6用于将光耦合到灯棒2，向灯棒2提供光线。光源耦合装置6可以包括诸如高功率LED灯、氙气灯或其他工业中常用到的光源等。
如图4及图5所示，图4是本发明背光结构第一实施例设有第一微结构的灯棒截面示意图；图5是图4所示的带有第一微结构的灯棒立体结构示意图。
为了提高光的利用率，本实施例在灯棒2的出光面上设有用于破坏灯棒2内的光线的全反射的第一微结构23。
上述第一微结构23是形成于灯棒2的出光面的外表面的凹槽，其横截面可以为半球形、菱形、半椭圆形或者其他形状。
如图6所示，图6是本发明背光结构第一实施例中设有反射结构的灯棒截面示意图。此外，灯棒2的材质可以是高纯度的PMMA（聚甲基丙烯酸甲酯，Polymethyl Methacrylate）或SiO2（二氧化硅）等材料，由于灯棒2材质特性，本实施例在灯棒2上与出光面21相对的非出光面22上设有反射结构24，该反射结构24可以为反射片或反射膜，反射片或反射膜与灯棒2的非出光面22粘接，其中，较佳的实施方式是，先把要贴反射片或反射膜的灯棒2的非出光面22制作成粗糙面，然后在上述粗糙面上贴反射片或反射镀膜，以增强光的反射效果。具体地，可以在灯棒2的非出光面22的表面设置第二微结构221（如图7所示），上述第二微结构221是形成于灯棒2的非出光面22的外表面的凸起，由此，形成该灯棒2的非出光面22的粗糙面，上述凸起的横截面可以为半球形、菱形或者半椭圆形或其他形状等。
设有反射结构24的灯棒2内的光路如图7所示，图7是本发明背光结构第一实施例中设有第二微结构的灯棒的光路原理示意图，由此，使得光线在灯棒2内除了向打破全反射的出光面2射出外，在其他地方做全反射，并可以根据设计需求来增加光的利用率。
另外，本实施例还可配合光源在灯棒2的开口处以及上述第一微结构23的外表面涂布相应的荧光材料层25，如图4所示，可以提高液晶显示器的显示屏的色彩饱和度。
上述结构可以使光线从灯棒内均匀射出，提高了光线的利用率，同时降低了制造成本，另外，在灯棒出光面上涂布荧光材料，提高了液晶显示器的显示屏的色彩饱和度。
如图8所示，图8是本发明背光结构第二实施例中的灯棒截面示意图。本实施例与上述第一实施例的区别在于，本实施例中的灯棒102截面形状为扇形，该扇形的弧形面为灯棒的非出光面；扇形的两条直边为灯棒102的出光面。上述结构可以很好的控制灯棒中光线的出光角度，使光线尽可能多的入射到导光板4内。
本实施例同样在灯棒2的出光面即上述扇形的两天直边上设置有第一微结构123，并在第一微结构123的表面设有荧光材料层125。其他与第一实施例相同。
如图9所示，图9是本发明背光结构第三实施例的结构示意图。本实施例与上述第一实施例的区别在于，上述第一实施例为侧入光式背光结构，本实施例为直下式背光结构，相同型号的直下式背光模组和侧入光式背光模组的主要区别在于，直下式背光模组可以做到模组轻量化，而侧入光式背光模组可以做到模组薄型化。
本实施例背光结构包括背板201、反射板203、扩散板204、光学膜片205以及灯棒202，背板201具有底板及侧板，反射板203设置在背板201的底板上，扩散板204及光学膜片205从下至上依次设置在反射板203的上方，若干灯棒202设置在反射板203与扩散板204之间。
本实施例中灯棒202同样装配有相应的光源耦合装置。
此外，本发明还提出一种液晶显示器，该液晶显示器包括背光模组，该背光模组可以包括如上各实施例中的背光结构。关于背光结构的内部结构及功能特点，请参照上述各实施例，在此不再赘述。
本发明背光结构及包含有该背光结构的液晶显示器，通过在灯棒需要出光的表面做微结构来打破光线在灯棒内的全反射，从而使光线从灯棒内均匀射出，同时在灯棒的非出光面设置反射结构，提高了光线的利用率，同时降低了制造成本，另外，在灯棒出光面上涂布荧光材料，提高了液晶显示器的显示屏的色彩饱和度。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (19)

  1. 一种背光结构，包括灯棒，其特征在于，所述灯棒具有出光面，所述灯棒的出光面上设有用于破坏所述灯棒内的光线的全反射的第一微结构。
  2. 根据权利要求1所述的背光结构，其特征在于，还包括荧光材料层，所述荧光材料层涂布在所述第一微结构的表面。
  3. 根据权利要求2所述的背光结构，其特征在于，所述灯棒为聚甲基丙烯酸甲酯PMMA或SiO2材质，所述灯棒还具有与所述出光面相对的非出光面，所述非出光面上设有反射结构。
  4. 根据权利要求3所述的背光结构，其特征在于，所述反射结构包括反射片或反射膜，所述非出光面上设有第二微结构，所述反射片或反射膜贴附于所述非出光面的第二微结构上；所述第二微结构是形成于所述非出光面的外表面的凸起，该凸起的横截面为半球形、菱形或者半椭圆形。
  5. 根据权利要求4所述的背光结构，其特征在于，所述第一微结构是形成于所述出光面的外表面的凹槽，该凹槽的横截面为半球形、菱形或者半椭圆形。
  6. 根据权利要求5所述的背光结构，其特征在于，所述灯棒的横截面为圆形或椭圆形。
  7. 根据权利要求5所述的背光结构，其特征在于，所述灯棒的横截面为扇形，所述扇形的弧形面为所述灯棒的非出光面，所述扇形的两条直边为所述灯棒的出光面。
  8. 根据权利要求4所述的背光结构，其特征在于，还包括用于向所述灯棒提供光线的光源耦合装置，所述光源耦合装置设置在所述灯棒的一侧或两侧。
  9. 根据权利要求8所述的背光结构，其特征在于，还包括背板、反射板、扩散板及光学膜片，所述背板具有底板及侧板，所述反射板设置在所述背板的底板上，所述扩散板及光学膜片从下至上依次设置在所述反射板的上方，若干所述灯棒设置在所述反射板与扩散板之间。
  10. 根据权利要求8所述的背光结构，其特征在于，还包括背板、反射板、导光板及光学膜片，所述背板具有底板及侧板，所述反射板设置在所述背板的底板上，所述导光板及光学膜片从下至上依次设置在所述反射板的上方，所述灯棒设置在所述背板的侧板与导光板的入光面之间，且所述灯棒的出光面与所述导光板的入光面相对。
  11. 一种液晶显示器，包括背光模组，其特征在于，所述背光模组包括背光结构，所述背光结构包括灯棒，所述灯棒具有出光面，所述灯棒的出光面上设有用于破坏所述灯棒内的光线的全反射的第一微结构。
  12. 根据权利要求11所述的液晶显示器，其特征在于，所述背光结构还包括荧光材料层，所述荧光材料层涂布在所述第一微结构的表面。
  13. 根据权利要求12所述的液晶显示器，其特征在于，所述灯棒为聚甲基丙烯酸甲酯PMMA或SiO2材质，所述灯棒还具有与所述出光面相对的非出光面，所述非出光面上设有反射结构。
  14. 根据权利要求13所述的液晶显示器，其特征在于，所述反射结构包括反射片或反射膜，所述非出光面上设有第二微结构，所述反射片或反射膜贴附于所述非出光面的第二微结构上；所述第二微结构是形成于所述非出光面的外表面的凸起，该凸起的横截面为半球形、菱形或者半椭圆形。
  15. 根据权利要求14所述的液晶显示器，其特征在于，所述第一微结构是形成于所述出光面的外表面的凹槽，该凹槽的横截面为半球形、菱形或者半椭圆形。
  16. 根据权利要求15所述的液晶显示器，其特征在于，所述灯棒的横截面为圆形或椭圆形；或者，所述灯棒的横截面为扇形，所述扇形的弧形面为所述灯棒的非出光面，所述扇形的两条直边为所述灯棒的出光面。
  17. 根据权利要求15所述的液晶显示器，其特征在于，所述背光结构还包括用于向所述灯棒提供光线的光源耦合装置，所述光源耦合装置设置在所述灯棒的一侧或两侧。
  18. 根据权利要求17所述的液晶显示器，其特征在于，所述背光结构还包括背板、反射板、扩散板及光学膜片，所述背板具有底板及侧板，所述反射板设置在所述背板的底板上，所述扩散板及光学膜片从下至上依次设置在所述反射板的上方，若干所述灯棒设置在所述反射板与扩散板之间。
  19. 根据权利要求17所述的液晶显示器，其特征在于，所述背光结构还包括背板、反射板、导光板及光学膜片，所述背板具有底板及侧板，所述反射板设置在所述背板的底板上，所述导光板及光学膜片从下至上依次设置在所述反射板的上方，所述灯棒设置在所述背板的侧板与导光板的入光面之间，且所述灯棒的出光面与所述导光板的入光面相对。
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