WO2013060053A1 - 背光模组及液晶显示器 - Google Patents

背光模组及液晶显示器 Download PDF

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Publication number
WO2013060053A1
WO2013060053A1 PCT/CN2011/082189 CN2011082189W WO2013060053A1 WO 2013060053 A1 WO2013060053 A1 WO 2013060053A1 CN 2011082189 W CN2011082189 W CN 2011082189W WO 2013060053 A1 WO2013060053 A1 WO 2013060053A1
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Prior art keywords
light
guide plate
light guide
side incident
incident surface
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PCT/CN2011/082189
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English (en)
French (fr)
Inventor
胡哲彰
贺虎
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深圳市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 filed Critical 深圳市华星光电技术有限公司
Priority to US13/378,044 priority Critical patent/US20130100381A1/en
Publication of WO2013060053A1 publication Critical patent/WO2013060053A1/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
    • G02B6/0031—Reflecting element, sheet or layer

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a backlight module and a liquid crystal display.
  • the backlight module includes a light source 11 and a light guide plate 12.
  • the light source 11 can be a light emitting diode (LED) for emitting light, and the light emitted by the light source 11 enters the light guide plate 12.
  • the coupling efficiency between the light source 11 and the light guide plate 12 is directly related to the light utilization efficiency of the entire backlight module.
  • the light source 11 in the prior art generally adopts an approximate Lambertian LED.
  • This type of LED has characteristics such as low voltage and high luminous flux, and the light emitted by the Bob-type LED is mainly concentrated on the guide.
  • the distance between the light-emitting surface 111 of the light source 11 and the side incident surface 121 of the light guide plate 12 is 2.4 mm, and if the distance is smaller, the ratio of light leakage is reduced.
  • Figure 2 A-2B is a comparison diagram of the light leakage ratio at different distances D1 and D2, where D1>D2.
  • the type of the light source 11 is constant, at a distance D1, the light leakage angle range is large, and the light leakage ratio is large; at the distance D2, the light leakage angle is small, and the light leakage ratio is small.
  • a white reflection sheet 13 is usually disposed between the light source 11 and the light guide plate 12. The light that is emitted outside the light guide plate 12 is reflected back to the light guide plate 12 by the white reflection sheet 13 .
  • the white reflection sheet 13 has a scattering property, after the light is directed toward the white reflection sheet 13, the white reflection sheet 13 scatters the light toward the respective angles, and finally the light coupled to the light guide plate 12 is finally coupled again.
  • the light utilization efficiency of the backlight module is reduced, which affects the light-emitting effect of the backlight module, thereby affecting the picture quality of the liquid crystal display.
  • An object of the present invention is to provide a backlight module for solving the problem that the light reflection efficiency of the backlight module is reduced because the white reflection sheet cannot effectively reflect the light emitted from the light source into the light guide plate. Further, it affects the technical problem of the picture display quality of the liquid crystal display.
  • Another object of the present invention is to provide a liquid crystal display to solve the problem that the light reflection efficiency of the backlight module is reduced because the white reflection sheet cannot effectively reflect the light from the light source outside the light guide plate into the light guide plate. Further, it affects the technical problem of the picture display quality of the liquid crystal display.
  • the present invention provides a backlight module including a light guide plate and a light source, the light guide plate including a side incident surface, an exit surface connected to the side incident surface, and a bottom surface corresponding to the exit surface; the light source includes a light emitting surface, the light source is disposed on a side of the side incident surface of the light guide plate, and a light emitting surface of the light source corresponds to a side incident surface of the light guide plate;
  • the backlight module further includes a specular reflection member extending along a reflection plane, the reflection plane being at a predetermined angle with a side incident surface of the light guide plate; and a light emitting surface of the light source
  • the spacing between the side incident surfaces of the light guide plate is a coupling distance, and the coupling distance falls within a coupling range between 0.1 and 2.5 mm;
  • the specular reflector is disposed between the light emitting surface of the light source and the side incident surface of the light guide plate; and the light that is emitted from the light emitting surface of the light source to the side incident surface of the light guide plate passes through the mirror surface The reflector is specularly reflected and enters the light guide plate.
  • a light-coupled region is formed between the light-emitting surface of the light source and the side incident surface of the light guide plate, and the specular reflector is disposed on the light-coupled region and the light guide plate.
  • the intersection of the exit faces, and the reflection plane is perpendicular to the side entrance face of the light guide plate, and the predetermined angle is a right angle.
  • the specular reflection member is a silver reflection sheet.
  • Another object of the present invention is to provide a backlight module, which can reduce the light utilization of the backlight module because the white reflective sheet cannot effectively reflect the light emitted from the light source into the light guide plate.
  • the rate which in turn affects the technical quality of the picture display quality of the liquid crystal display.
  • the present invention provides a backlight module including a light guide plate and a light source, the light guide plate including a side incident surface, an exit surface connected to the side incident surface, and a bottom surface corresponding to the exit surface
  • the light source includes a light emitting surface, the light source is disposed on a side of the side incident surface of the light guide plate, and a light emitting surface of the light source corresponds to a side incident surface of the light guide plate,
  • the backlight module further includes a specular reflector disposed between the light emitting surface of the light source and a side incident surface of the light guide plate; and the light emitting surface of the light source is directed toward the light guide plate Light rays outside the side incident surface are specularly reflected by the specular reflector and enter the light guide plate.
  • the specular reflection member extends along a reflection plane, and the reflection plane forms a predetermined angle with a side incident surface of the light guide plate.
  • a light-coupled region is formed between the light-emitting surface of the light source and the side incident surface of the light guide plate, and the specular reflector is disposed on the light-coupled region and the light guide plate.
  • the intersection of the exit faces, and the reflection plane is perpendicular to the side entrance face of the light guide plate, and the predetermined angle is a right angle.
  • the specular reflection member is a silver reflection sheet.
  • the interval between the light emitting surface of the light source and the side incident surface of the light guide plate is a light coupling distance, and the light coupling distance falls within a preset coupling range.
  • the coupling light range is between 0.1 and 2.5 mm.
  • the present invention provides a liquid crystal display, including a liquid crystal display panel, the liquid crystal display further includes a backlight module, the liquid crystal display panel is connected to the backlight module, and the backlight module includes a light guide plate.
  • a light source the light guide plate includes a side incident surface, an exit surface connected to the side incident surface, and a bottom surface corresponding to the exit surface;
  • the light source includes a light emitting surface, and the light source is disposed on the light guide plate a side of the side incident surface, and a light emitting surface of the light source corresponds to a side incident surface of the light guide plate,
  • the backlight module further includes a specular reflector disposed between the light emitting surface of the light source and a side incident surface of the light guide plate; and the light emitting surface of the light source is directed toward the light guide plate Light rays outside the side incident surface are specularly reflected by the specular reflector and enter the light guide plate.
  • the specular reflection member extends along a reflection plane, and the reflection plane forms a predetermined angle with a side incident surface of the light guide plate.
  • a light-coupled region is formed between the light-emitting surface of the light source and the side incident surface of the light guide plate, and the specular reflector is disposed at the light-coupled region and the light guide plate.
  • the intersection of the faces, and the reflection plane is perpendicular to the side entrance face of the light guide plate, and the predetermined angle is a right angle.
  • the specular reflection member is a silver reflection sheet.
  • the interval between the light emitting surface of the light source and the side incident surface of the light guide plate is a light coupling distance, and the coupling light distance is within a predetermined coupling range, the coupling The light range is between 0.1 and 2.5 mm.
  • the present invention solves the technical problem that the white reflective sheet can not effectively reflect the light outside the light guide plate into the light guide plate in the prior art, thereby reducing the light utilization efficiency of the backlight module and improving the technical problem.
  • the picture display quality of the liquid crystal display is a technical problem that the white reflective sheet can not effectively reflect the light outside the light guide plate into the light guide plate in the prior art, thereby reducing the light utilization efficiency of the backlight module and improving the technical problem.
  • FIG. 1 is a partial structural schematic view of a backlight module in the prior art
  • 2A-2B are schematic diagrams showing light leakage ratios corresponding to different distances between a light guide plate and a light source in the prior art
  • FIG. 3 is a partial structural schematic view of a backlight module in the prior art
  • FIG. 4 is a schematic structural view of a preferred embodiment of a backlight module of the present invention.
  • FIG. 5 is a schematic view showing the connection of a specular reflection member and a light guide plate of a backlight module according to the present invention
  • Fig. 6 is a schematic view showing the comparison of the coupling degree of the specular reflection member provided by the present invention and the coupling efficiency of other cases.
  • the backlight module 4 is a structure of a preferred embodiment of a backlight module according to the present invention.
  • the backlight module includes a light guide plate 41 and a light source 42.
  • the light guide plate 41 includes a side incident surface 411 , an exit surface 412 connected to the side incident surface 411 , and a bottom surface 413 corresponding to the exit surface 412 .
  • the light source 42 is disposed on a side of the side incident surface 411 of the light guide plate 41.
  • the light source 42 includes a plurality of LEDs.
  • the package resin of each LED has a light emitting surface 421, and the light emitting surface 421 of the light source 42 is emitted.
  • the light rays are incident on the side incident surface 411 of the light guide plate 41.
  • a light coupling region 43 is formed between the light emitting surface 421 of the light source 42 and the side incident surface 411 of the light guide plate 41.
  • the light-emitting surface 421 of the light source 42 and the side incident surface 411 of the light guide plate 41 are separated by a coupling distance D.
  • the coupling distance D falls within a preset coupling range, for example, the preset coupling range is greater than 0.1 mm and less than 2.5 mm, and the coupling distance D is 1.0 mm.
  • the backlight module further includes a specular reflector 44 disposed between the light emitting surface 421 of the light source 42 and the side incident surface 411 of the light guide plate 41.
  • the specular reflection member 44 is configured to generate specular reflection, and light rays that are emitted from the light-emitting surface 421 of the light source 42 to the side of the side incident surface 411 of the light guide plate 41 are specularly reflected by the specular reflection member 44.
  • the light guide plate 41 is configured to generate specular reflection, and light rays that are emitted from the light-emitting surface 421 of the light source 42 to the side of the side incident surface 411 of the light guide plate 41 are specularly reflected by the specular reflection member 44.
  • the specular reflector 44 extends along a reflection plane B that is at a predetermined angle ⁇ from the side incident surface 411 of the light guide plate 41 .
  • the specular reflector 44 is disposed at the intersection of the coupling region 43 and the exit surface 412 of the light guide plate 41, and the reflection plane B is perpendicular to the light guide plate. Side incident surface 411 of 41.
  • the specular reflector 44 may be disposed at other positions of the light coupling region 43 or outside the light coupling region 43 as long as the specular reflector 44 can enable the light source. The light rays that are incident on the light guide plate 41 outside the light guide plate 41 are reflected back to the light guide plate 41, and are not enumerated here.
  • the preset angle ⁇ is 90 degrees.
  • other preset angles may be used as long as the light that is incident on the specular reflector 44 is used by the specular reflector 44.
  • the light guide plate 41 can be entered, which is not enumerated here.
  • the coupling value of the specular reflection member 44 to the light emitted by the light source 42 is greater than a preset coupling value, and the coupling degree is to specularly reflect the light into the guide
  • the ratio of the light plate 41 For example, when the viewing angle is 60 degrees, by setting the preset angle ⁇ to 90 degrees, the proportion of the specular reflection member 44 that reflects the light of the light source 42 toward the specular reflector 44 into the light guide plate 41 is reflected. More than 70%.
  • the specular reflector 44 is a silver reflective sheet.
  • it may be a specular reflector of other materials, as long as specular reflection can be generated on the light that is incident on the specular reflector 44. .
  • the specular reflector 44 will illuminate the specular reflector 44. Specular reflection is performed, and therefore, the light that is incident on the specular reflector 44 is reflected by the specular surface of the specular reflector 44 and enters the light guide plate.
  • the light incident on the specular reflector 44 can only produce specular reflection, the light incident on the specular reflector 44 can be specularly reflected to the light guide plate by flexibly setting the preset angle ⁇ . 41.
  • FIG. 6 is a comparison diagram of coupling degrees corresponding to different coupling distances in three cases, wherein L1 is the coupling degree without any lens, and L2 is the coupling degree when using the white reflection sheet, FIG. 3 is The degree of coupling of the specular reflector 44 of the embodiment of the present invention is used.
  • the specular reflection member 44 since the specular reflection member 44 generates specular reflection, it can be ensured that the light incident on the specular reflection member 44 can only generate specular reflection and enter the light guide plate 41, thereby ensuring a relatively high degree of coupling. The light utilization efficiency of the backlight module is greatly improved, thereby improving the picture display quality of the liquid crystal display.
  • the present invention also provides a liquid crystal display, the liquid crystal display includes a liquid crystal display panel, the liquid crystal display further includes a backlight module provided by the present invention, the backlight module is connected to the liquid crystal display panel, and the backlight module is The emitted light enters the liquid crystal display panel. Since the backlight module has been described in detail above, it will not be described herein.

Abstract

一种背光模组及液晶显示器，所述背光模组包括导光板（41）和光源（42），所述导光板（41）包括侧入射面（411）、与所述侧入射面（411）相连的出射面（412）、以及与所述出射面（412）相对应的底面（413），所述光源（42）包括一发光面（421），所述光源（42）设置于所述导光板（41）的侧入射面（411）一侧，且所述光源（42）的发光面（421）对应所述导光板（41）的侧入射面（411），所述背光模组还包括一镜面反射件（44），所述镜面反射件（44）设置于所述光源（42）的发光面（421）和所述导光板（41）的侧入射面（411）之间，从所述光源（42）的发光面（421）射向所述导光板（41）之外的光线经所述镜面反射件（44）镜面反射后进入所述导光板（41）。

Description

背光模组及液晶显示器 技术领域
本发明涉及液晶显示技术领域，特别涉及一种背光模组及液晶显示器。
 背景技术
随着液晶显示技术的不断发展，对液晶显示功能的要求也越来越高。
图1为现有技术中背光模组的部分结构示意图，所述背光模组包括光源11和导光板12。其中所述光源11可为发光二极管（LED），用于发射光线，所述光源11发射的光线进入导光板12。其中，所述光源11与所述导光板12之间的耦合效率，直接关系到整个背光模组的光利用率。
现有技术中的光源11一般采用近似琅勃型(Lambertian)的LED，这种类型的LED具有低电压高光通量等特性，所述琅勃型LED发出来的光主要集中在正对所述导光板41的角度，一旦角度大到一定程度，该角度的光线数也相对减少。
以型号为5630的LED封装体为例，该封装体的尺寸为5.6*3.0*0.8 mm(毫米)。对其在水平和竖直方向的不同视角的光通量进行量测，测出大约在60度视角时，光通量已经减小到一半，显然，视角越大，光通量的相对比例就越小，其中，光通量为所述光源11发出亮光的比率。
而且，所述灯源11的发光面111与所述导光板12的侧入射面121之间的距离为2.4mm，如果距离越小，漏光的比例就会减小。
请参阅图2A-2B，图2 A-2B为在不同距离D1和D2下，漏光比例的对比示意图，其中，D1>D2。显然，在所述灯源11的型号不变的情况下，在距离D1时，漏光角度范围较大，漏光的比例就大；在距离D2时，漏光角度较小，漏光的比例就小。
而考虑到所述导光板12的热膨胀特性，必须要在所述光源11和所述导光板12之间预留一定的空间，以使得所述导光板12有膨胀空间。
请参阅图3，为了解决由于所述光源11和所述导光板12之间的距离造成的光损失的问题，通常会在所述光源11和所述导光板12之间设置一白反射片13，通过所述白反射片13将射向所述导光板12之外的光线反射回所述导光板12。
但是，由于所述白反射片13具有散射特性，光线射向所述白反射片13后，所述白反射片13将光线朝向各个角度进行散射，最终再次耦合进所述导光板12的光线有限，降低了背光模组的光利用率，影响了背光模组的出光效果，进而影响液晶显示器的画面质量。
 技术问题
本发明的一个目的在于提供一种背光模组，以解决现有技术中的由于白反射片不能有效的将光源射向导光板之外的光线反射进导光板，降低了背光模组的光利用率，进而影响液晶显示器的画面显示质量的技术问题。
本发明的另一个目的在于提供一种液晶显示器，以解决现有技术中的由于白反射片不能有效的将光源射向导光板之外的光线反射进导光板，降低了背光模组的光利用率，进而影响液晶显示器的画面显示质量的技术问题。
 技术解决方案
本发明提供了一种背光模组，包括导光板和光源，所述导光板包括侧入射面，与所述侧入射面相连的出射面，以及与所述出射面相对应的底面；所述光源包括一发光面，所述光源设置于所述导光板的侧入射面一侧，且所述光源的发光面对应所述导光板的侧入射面；
所述背光模组还包括一镜面反射件，所述镜面反射件沿一反射平面延伸，所述反射平面与所述导光板的侧入射面呈一预设角度；所述光源的发光面和所述导光板的侧入射面之间的间隔一耦光距离，所述耦光距离落在介于0.1至2.5毫米之间的一耦光范围内；
所述镜面反射件设置于所述光源的发光面和所述导光板的侧入射面之间；从所述光源的发光面射向所述导光板的侧入射面之外的光线经所述镜面反射件镜面反射后进入所述导光板。
在本发明的背光模组中，所述光源的发光面与所述导光板的侧入射面之间形成一耦光区域，所述镜面反射件设置于所述耦光区域与所述导光板的出射面的交汇处，且所述反射平面垂直于所述导光板的侧入射面，所述预设角度为直角。
在本发明的背光模组中，所述镜面反射件为银反射片。
本发明的另一个目的在于提供一种背光模组，以解决现有技术中的由于白反射片不能有效的将光源射向导光板之外的光线反射进导光板，降低了背光模组的光利用率，进而影响液晶显示器的画面显示质量的技术问题。
为解决上述问题，本发明提供了一种背光模组，包括导光板和光源，所述导光板包括侧入射面，与所述侧入射面相连的出射面，以及与所述出射面相对应的底面；所述光源包括一发光面，所述光源设置于所述导光板的侧入射面一侧，且所述光源的发光面对应所述导光板的侧入射面，
所述背光模组还包括一镜面反射件，所述镜面反射件设置于所述光源的发光面和所述导光板的侧入射面之间；从所述光源的发光面射向所述导光板的侧入射面之外的光线经所述镜面反射件镜面反射后进入所述导光板。
在本发明的背光模组中，所述镜面反射件沿一反射平面延伸，所述反射平面与所述导光板的侧入射面呈一预设角度。
在本发明的背光模组中，所述光源的发光面与所述导光板的侧入射面之间形成一耦光区域，所述镜面反射件设置于所述耦光区域与所述导光板的出射面的交汇处，且所述反射平面垂直于所述导光板的侧入射面，所述预设角度为直角。
在本发明的背光模组中，所述镜面反射件为银反射片。
在本发明的背光模组中，所述光源的发光面和所述导光板的侧入射面之间的间隔一耦光距离，所述耦光距离落在一预设的耦光范围内，所述耦光范围介于0.1至2.5毫米之间。
本发明的还一个目的在于提供一种液晶显示器，以解决现有技术中的由于白反射片不能有效的将光源射向导光板之外的光线反射进导光板，降低了背光模组的光利用率，进而影响液晶显示器的画面显示质量的技术问题。
为解决上述问题，本发明提供了一种液晶显示器，包括液晶显示面板，所述液晶显示器还包括一背光模组，所述液晶显示面板连接所述背光模组，所述背光模组包括导光板和光源，所述导光板包括侧入射面，与所述侧入射面相连的出射面，以及与所述出射面相对应的底面；所述光源包括一发光面，所述光源设置于所述导光板的侧入射面一侧，且所述光源的发光面对应所述导光板的侧入射面，
所述背光模组还包括一镜面反射件，所述镜面反射件设置于所述光源的发光面和所述导光板的侧入射面之间；从所述光源的发光面射向所述导光板的侧入射面之外的光线经所述镜面反射件镜面反射后进入所述导光板。
在本发明的液晶显示器中，所述镜面反射件沿一反射平面延伸，所述反射平面与所述导光板的侧入射面呈一预设角度。
在本发明的液晶显示器中，所述光源的发光面与所述导光板的侧入射面之间形成一耦光区域，所述镜面反射件设置于所述耦光区域与所述导光板的出射面的交汇处，且所述反射平面垂直于所述导光板的侧入射面，所述预设角度为直角。
在本发明的液晶显示器中，所述镜面反射件为银反射片。
在本发明的液晶显示器中，所述光源的发光面和所述导光板的侧入射面之间的间隔一耦光距离，所述耦光距离在一预设的耦光范围内，所述耦光范围介于0.1至2.5毫米之间。
 有益效果
本发明相对于现有技术，解决了现有技术中的由于白反射片不能有效的将光源射向导光板之外的光线反射进导光板，降低了背光模组的光利用率的技术问题，提高了液晶显示器的画面显示质量。
 附图说明
图1为现有技术中背光模组的部分结构示意图；
图2A-2B为现有技术中导光板和光源之间不同距离对应的漏光比例示意图；
图3为现有技术中背光模组的部分结构示意图；
图4为本发明中背光模组的较佳实施例的结构示意图。
图5为本发明中背光模组的镜面反射件和导光板的连接示意图；
图6使用本发明提供的镜面反射件的耦合度与其它情形的耦光效率的对比示意图。
 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。
图4为本发明中背光模组的较佳实施例的结构，所述背光模组包括导光板41和光源42。
请参阅图4，所述导光板41包括侧入射面411，与所述侧入射面411连接的出射面412，与所述出射面412对应的底面413。所述光源42设置在所述导光板41的侧入射面411一侧，所述光源42包括数个LED，各LED本身的封装树脂皆具有一发光面421，所述光源42的发光面421发射的光线射向所述导光板41的侧入射面411。所述光源42的发光面421和所述导光板41的侧入射面411之间形成一耦光区域43。
在本实施例中，所述光源42的发光面421和所述导光板41的侧入射面411之间间隔一耦光距离D。其中，所述耦光距离D落在一预设的耦光范围内，譬如预设的耦光范围为大于0.1mm、小于2.5mm的范围，耦光距离D为1.0mm。
在本实施例中，所述背光模组还包括镜面反射件44，所述镜面反射件44设置于所述光源42的发光面421和所述导光板41的侧入射面411之间。其中，所述镜面反射件44用于产生镜面反射，从所述光源42的发光面421射向所述导光板41的侧入射面411之外的光线经所述镜面反射件44镜面反射后进入所述导光板41。
请参阅图5，所述镜面反射件44沿一反射平面B延伸，所述反射平面B与所述导光板41的侧入射面411呈预设角度θ。
在图4所示的实施例中，所述镜面反射件44设置于所述耦光区域43与所述导光板41的出射面412的交汇处，且所述反射平面B垂直于所述导光板41的侧入射面411。当然，在具体实施过程中，所述镜面反射件44也可以设置在耦光区域43的其它位置，或者设置于所述耦光区域43外，只要使得所述镜面反射件44能够将所述光源42射向所述导光板41之外的光线镜面反射回所述导光板41即可，此处不一一列举。
请参阅图5，在本实施例中，所述预设角度θ为90度，当然也可以是其他的预设角度，只要使得射向所述镜面反射件44的光线被所述镜面反射件44镜面反射后进入所述导光板41即可，此处不一一列举。
其中，在预设角度θ为90度时，所述镜面反射件44对所述光源42发射的光线的耦合度值大于预设的耦合值，所述耦合度为将光线镜面反射进所述导光板41的比例。譬如在视角为60度时，通过设置预设角度θ为90度，则所述镜面反射件44将所述光源42射向所述镜面反射件44的光线镜面反射进所述导光板41的比例大于70%。
优选的，所述镜面反射件44为银反射片，当然也可以是其他材质的镜面反射件，只要能够对射向所述镜面反射件44的光线产生镜面反射即可，此处不一一列举。
本发明中背光模组的较佳实施例的工作原理为：
请一并参阅图4和图5，背光模组在发光过程中，从所述光源42的发光面421出射的光线，一部分直接进入所述导光板41的侧入射面411，另有部分光线射向所述导光板41的侧入射面411之外，请参阅图4，通过在耦光区域43上方设置镜面反射件44，所述镜面反射件44会对射向所述镜面反射件44的光线进行镜面反射，因此，射向所述镜面反射件44的光线在经所述镜面反射件44的镜面反射后，进入所述导光板。
而且，由于射向所述镜面反射件44的光线只能产生镜面反射，因此，通过灵活的设置预设角度θ，可以使得射向所述镜面反射件44的光线都镜面反射至所述导光板41。
请参阅图6，图6为三种情况下不同耦光距离对应的耦合度的对比示意图，其中，L1为不设置任何镜片的耦合度，L2为使用白反射片时的耦合度，图3为使用本发明实施例的镜面反射件44的耦合度。
显然，由于所述镜面反射件44产生的为镜面反射，因此可以保证射向所述镜面反射件44的光线仅能产生镜面反射并进入所述导光板41，保证了相对较高的耦合度，极大地提高了背光模组的光利用率，进而提高了液晶显示器的画面显示质量。
本发明还提供一种液晶显示器，所述液晶显示器包括液晶显示面板，所述液晶显示器还包括本发明提供的背光模组，所述背光模组连接所述液晶显示面板，从所述背光模组出射的光线进入所述液晶显示面板，鉴于该背光模组在上文已有详细的描述，此处不再赘述。
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
工业实用性
序列表自由内容

Claims (13)

  1. 一种背光模组，包括导光板和光源，所述导光板包括侧入射面，与所述侧入射面相连的出射面，以及与所述出射面相对应的底面；所述光源包括一发光面，所述光源设置于所述导光板的侧入射面一侧，且所述光源的发光面对应所述导光板的侧入射面，其特征在于：
    所述背光模组还包括一镜面反射件，所述镜面反射件沿一反射平面延伸，所述反射平面与所述导光板的侧入射面呈一预设角度；所述光源的发光面和所述导光板的侧入射面之间的间隔一耦光距离，所述耦光距离落在介于0.1至2.5毫米之间的一耦光范围内；
    所述镜面反射件设置于所述光源的发光面和所述导光板的侧入射面之间；从所述光源的发光面射向所述导光板的侧入射面之外的光线经所述镜面反射件镜面反射后进入所述导光板。
  2. 根据权利要求1所述的背光模组，其特征在于，所述光源的发光面与所述导光板的侧入射面之间形成一耦光区域，所述镜面反射件设置于所述耦光区域与所述导光板的出射面的交汇处，且所述反射平面垂直于所述导光板的侧入射面，所述预设角度为直角。
  3. 根据权利要求1所述的背光模组，其特征在于，所述镜面反射件为银反射片。
  4. 一种背光模组，包括导光板和光源，所述导光板包括侧入射面，与所述侧入射面相连的出射面，以及与所述出射面相对应的底面；所述光源包括一发光面，所述光源设置于所述导光板的侧入射面一侧，且所述光源的发光面对应所述导光板的侧入射面，其特征在于：
    所述背光模组还包括一镜面反射件，所述镜面反射件设置于所述光源的发光面和所述导光板的侧入射面之间；从所述光源的发光面射向所述导光板的侧入射面之外的光线经所述镜面反射件镜面反射后进入所述导光板。
  5. 根据权利要求4所述的背光模组，其特征在于，所述镜面反射件沿一反射平面延伸，所述反射平面与所述导光板的侧入射面呈一预设角度。
  6. 根据权利要求5所述的背光模组，其特征在于，所述光源的发光面与所述导光板的侧入射面之间形成一耦光区域，所述镜面反射件设置于所述耦光区域与所述导光板的出射面的交汇处，且所述反射平面垂直于所述导光板的侧入射面，所述预设角度为直角。
  7. 根据权利要求4所述的背光模组，其特征在于，所述光源的发光面和所述导光板的侧入射面之间的间隔一耦光距离，所述耦光距离落在介于0.1至2.5毫米之间的一耦光范围内。
  8. 根据权利要求4所述的背光模组，其特征在于，所述镜面反射件为银反射片。
  9. 一种液晶显示器，包括液晶显示面板，其特征在于，还包括一背光模组，所述液晶显示面板连接所述背光模组，所述背光模组包括导光板和光源，所述导光板包括侧入射面，与所述侧入射面相连的出射面，以及与所述出射面相对应的底面；所述光源包括一发光面，所述光源设置于所述导光板的侧入射面一侧，且所述光源的发光面对应所述导光板的侧入射面，
    所述背光模组还包括一镜面反射件，所述镜面反射件设置于所述光源的发光面和所述导光板的侧入射面之间；从所述光源的发光面射向所述导光板的侧入射面之外的光线经所述镜面反射件镜面反射后进入所述导光板。
  10. 根据权利要求9所述的液晶显示器，其特征在于，所述镜面反射件沿一反射平面延伸，所述反射平面与所述导光板的侧入射面呈一预设角度。
  11. 根据权利要求10所述的液晶显示器，其特征在于，所述光源的发光面与所述导光板的侧入射面之间形成一耦光区域，所述镜面反射件设置于所述耦光区域与所述导光板的出射面的交汇处，且所述反射平面垂直于所述导光板的侧入射面，所述预设角度为直角。
  12. 根据权利要求9所述的液晶显示器，其特征在于，所述光源的发光面和所述导光板的侧入射面之间的间隔一耦光距离，所述耦光距离落在介于0.1至2.5毫米之间的一耦光范围内。
  13. 根据权利要求9所述的液晶显示器，其特征在于，所述镜面反射件为银反射片。
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CN104296002A (zh) * 2014-09-17 2015-01-21 深圳市华星光电技术有限公司 背光模组和使用其的液晶显示装置
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005135860A (ja) * 2003-10-31 2005-05-26 Harison Toshiba Lighting Corp Ｌｅｄバックライト装置
CN1873505A (zh) * 2005-05-31 2006-12-06 三星电子株式会社 背光组件及具有该背光组件的液晶显示器
JP2007128748A (ja) * 2005-11-04 2007-05-24 Nec Lcd Technologies Ltd 点光源バックライト
US20070274095A1 (en) * 2006-05-24 2007-11-29 Destain Patrick R Backlight wedge with adjacent reflective surfaces
CN101377586A (zh) * 2007-08-29 2009-03-04 奇力光电科技股份有限公司 背光模组及具有该背光模组的液晶显示装置
CN201944701U (zh) * 2011-03-09 2011-08-24 青岛海信电器股份有限公司 背光模组及包括其的液晶显示装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100386680C (zh) * 2005-02-23 2008-05-07 友达光电股份有限公司 背光模块
KR100809224B1 (ko) * 2006-12-11 2008-02-29 삼성전기주식회사 도광 버퍼판을 갖는 백라이트 유닛
CN101226259A (zh) * 2007-01-16 2008-07-23 财团法人工业技术研究院 耦光元件
CN101929641A (zh) * 2010-08-01 2010-12-29 友达光电(厦门)有限公司 背光模组及具有该背光模组的显示装置
CN201954400U (zh) * 2011-01-22 2011-08-31 冠捷显示科技（厦门）有限公司 一种led混光背光源
CN102182969A (zh) * 2011-05-16 2011-09-14 康佳集团股份有限公司 一种侧入式led光源背光模组

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005135860A (ja) * 2003-10-31 2005-05-26 Harison Toshiba Lighting Corp Ｌｅｄバックライト装置
CN1873505A (zh) * 2005-05-31 2006-12-06 三星电子株式会社 背光组件及具有该背光组件的液晶显示器
JP2007128748A (ja) * 2005-11-04 2007-05-24 Nec Lcd Technologies Ltd 点光源バックライト
US20070274095A1 (en) * 2006-05-24 2007-11-29 Destain Patrick R Backlight wedge with adjacent reflective surfaces
CN101377586A (zh) * 2007-08-29 2009-03-04 奇力光电科技股份有限公司 背光模组及具有该背光模组的液晶显示装置
CN201944701U (zh) * 2011-03-09 2011-08-24 青岛海信电器股份有限公司 背光模组及包括其的液晶显示装置

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