WO2016107012A1 - 导光板、背光源及显示装置 - Google Patents

导光板、背光源及显示装置 Download PDF

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Publication number
WO2016107012A1
WO2016107012A1 PCT/CN2015/076570 CN2015076570W WO2016107012A1 WO 2016107012 A1 WO2016107012 A1 WO 2016107012A1 CN 2015076570 W CN2015076570 W CN 2015076570W WO 2016107012 A1 WO2016107012 A1 WO 2016107012A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light guide
incident surface
light source
Prior art date
Application number
PCT/CN2015/076570
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English (en)
French (fr)
Inventor
姚永利
应文涛
解晓丽
Original Assignee
京东方科技集团股份有限公司
京东方光科技有限公司
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Application filed by 京东方科技集团股份有限公司, 京东方光科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/894,060 priority Critical patent/US9733409B2/en
Publication of WO2016107012A1 publication Critical patent/WO2016107012A1/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
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • 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
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a light guide plate, a backlight, and a display device.
  • the liquid crystal display device is widely used in display devices due to its advantages of low power consumption, long life, and environmental protection.
  • the liquid crystal panel itself in the liquid crystal display device does not have the light-emitting characteristics, in order to achieve the purpose of displaying the image on the liquid crystal panel, it is necessary to provide the liquid crystal panel with a surface light source device such as a backlight.
  • the function of the backlight is to supply a uniform surface light source to the liquid crystal panel, thereby enabling the liquid crystal panel to achieve image display.
  • the light-emitting component usually adopts a light-emitting diode (LED) light source, and the LED light source mainly utilizes the advantages of low operating voltage, high light-emitting brightness, fast response speed and long life.
  • LED light-emitting diode
  • the emitted light of the LED light source has strong optical directivity, that is, the emitted light has a certain divergence angle, when the light emitted from the LED light source directly enters the light guide plate from the light incident surface of the light guide plate, the light guide plate is An optical dark area will appear on the illuminating surface. Referring to FIG. 1 and FIG.
  • the present invention provides a light guide plate comprising:
  • the light guide plate body comprising: a first light incident surface, and the first light incident surface a first light exiting surface intersecting, and a first bottom surface opposite the first light emitting surface;
  • At least one boss disposed on the first light incident surface includes: a second bottom surface that is in contact with the first light incident surface, a top surface opposite to the second bottom surface, and Two end faces and two side faces respectively intersecting the top surface and the second bottom surface,
  • the area of the top surface is smaller than the area of the second bottom surface
  • the two end surfaces are respectively flush with the first bottom surface and the first light emitting surface
  • the two side surfaces are respectively usable The slope of the second entrance surface
  • the two slopes of the boss and the first light incident surface are at an angle of the same angle.
  • the slope surface is a plane or a curved surface.
  • the boss and the light guide body are of a unitary structure.
  • the invention also provides a backlight, comprising:
  • the light guide plate includes a light guide plate body and at least one boss disposed on the first light incident surface of the light guide plate body;
  • a reflector located beside the light guide plate opposite to the first light incident surface of the light guide plate body;
  • first light source and a second light source between the first light incident surface and the light reflecting plate, wherein the first light source and the second light source are respectively located at two ends of the first light incident surface, and respectively Facing the two slopes of the boss.
  • the first light source and the second light source are arranged in parallel and facing each other.
  • the first light source and the second light source are both disposed obliquely and respectively at an angle of the same angle as the first light incident surface.
  • the backlight further includes a third light source opposite to a top surface of the boss.
  • the backlight further includes a backboard located outside the light guide plate and a plastic frame connected to the backboard, and the reflector is disposed on a sidewall of the backboard or a side of the plastic frame On the wall.
  • the present invention also provides a display device comprising: a display panel; and a backlight as described in the above technical solution disposed on the back surface of the display panel.
  • the light guide plate provided by the present invention comprises a light guide plate main body and at least one boss disposed on the first light incident surface of the light guide plate main body, and the two end faces of each of the bosses and the first bottom surface of the light guide plate main body and the first light output respectively The faces are flush, and the two sides of each boss are respectively used as the second light incident surface Slope.
  • one light source is disposed at each end of the first light incident surface of the light guide plate main body. A part of the light emitted by the two light sources will be incident on the slope of the boss and refracted through the slope to enter the light guide body, thereby eliminating optical darkness formed on the first light-emitting surface of the light guide body.
  • the area emits light uniformly from the light guide plate, thereby improving the uniformity of light emission of the backlight and improving the display quality of the display device.
  • FIG. 1 is a plan view of a backlight in the prior art
  • Figure 2 is a perspective view of the backlight shown in Figure 1;
  • FIG. 3 is a perspective view of a light guide plate according to an embodiment of the present invention.
  • FIG. 4 is a plan view 1 of a backlight in an embodiment of the present invention.
  • Figure 5 is a plan view 2 of a backlight in an embodiment of the present invention.
  • Figure 6 is a plan view 3 of a backlight in accordance with an embodiment of the present invention.
  • a light guide plate according to an embodiment of the present invention includes a light guide plate main body 10 and at least one boss 30, wherein
  • the light guide plate main body 10 includes: a first light incident surface 11 , a first light emitting surface 12 intersecting the first light incident surface 11 , and a first bottom surface 13 opposite to the first light emitting surface 12 ;
  • the boss 30 includes: a second bottom surface (not shown) that is attached to the first light incident surface 11 and a top surface 32 opposite to the second bottom surface, and two end surfaces (not shown) and two sides intersecting the top surface 32 and the second bottom surface respectively, wherein the area of the top surface 32 is smaller than the second bottom surface
  • the two end faces are flush with the first bottom surface 13 and the first light exit surface 12, respectively, and the two side surfaces are respectively slope surfaces 31 which can be used as the second light incident surface.
  • the first light incident surface 11 , the first light exit surface 12 , and the first bottom surface 13 are respectively three side surfaces of the light guide plate main body 10 .
  • the first light incident surface is the left side surface of the light guide plate main body 10
  • the first light exit surface 12 is the upper surface of the light guide plate main body 10
  • the first bottom surface 13 is the lower surface of the light guide plate main body 10.
  • the boss 30 is disposed on the first light incident surface 11.
  • the upper and lower end faces of the boss 30 are flush with the first light emitting surface 12 and the first bottom surface 13 of the light guide plate main body 10, and the left and right (front and rear) of the boss 30 are respectively
  • the side faces are respectively slope surfaces 31 at an angle to the first light incident surface 11, and the slope surfaces 31 can serve as the second light incident surface of the light guide plate.
  • the two slope surfaces 31 of the boss 30 and the first light incident surface 11 are at an angle of the same angle to improve the uniformity of light emitted from the first light-emitting surface 12 of the light guide body 10 and reduce the production guide.
  • the technical difficulty of the light board may be a plane or a curved surface, and the top surface 32 of the boss 30 may be parallel to the light incident surface 11 to facilitate subsequent assembly of the backlight.
  • a reflector and at least two light sources are disposed beside the first light incident surface 11 of the light guide plate main body 10, and each light source is located between the reflector and the first light incident surface 11, And two of the light sources are located at both ends of the first light incident surface 11.
  • the divergence angle of the light from each light source is increased, so that the optical dark area formed on the first light-emitting surface 12 of the light guide body can be eliminated, and the light can be uniformly emitted from the light guide plate. , thereby improving the uniformity of light output of the backlight.
  • an embodiment of the present invention further provides a backlight, including: the light guide plate mentioned in the above technical solution, the light guide plate includes a light guide plate main body 10 and a light guide plate main body 10 . At least one boss 30 on the first light incident surface 11; a light reflecting plate 40 located beside the light guide plate and opposite to the first light incident surface 11 of the light guide plate main body 10; and the first light incident surface 11 and the light reflecting plate 40
  • the first light source 20 and the second light source 21, the first light source 20 and the second light source 21 are respectively located at two ends of the first light incident surface 11 and respectively face the two slope surfaces 31 of the boss 30.
  • the optical dark area formed on the first light-emitting surface 12 of the light guide plate main body 10 can be eliminated, thereby improving the backlight.
  • the structure of the light guide plate has been described above and will not be described herein.
  • the above two light sources may specifically be LED light sources, and the two light sources are mainly arranged in the following two ways:
  • Method 1 Please continue to refer to FIG. 4, the first light source 20 and the second light source 21 are arranged in parallel and facing each other. Specifically, the first light source 20 and the second light source 21 are respectively located at two ends of the first light incident surface 11, and the light emitting surfaces of the first light source 20 and the second light source 21 respectively face the two slope surfaces 31 of the boss 30, and two The light sources 20 are arranged in parallel. A part of the light emitted by the first light source 20 and the second light source 21 is refracted by the first light incident surface 11 and enters the light guide plate main body 10.
  • the other portion of the light is refracted by the slope 31 and enters the light guide plate main body 10, and the rest
  • the light is reflected by the reflector 40 and refracted by the slope 31 to enter the light guide body 10. Since a part of the light emitted from the first light source 20 and the second light source 21 located at both ends of the first light incident surface 11 is incident on the slope surface 31 and is refracted through the slope surface 31, it enters the light guide plate main body 10, and therefore,
  • the optical dark area formed on the first light-emitting surface 12 of the light guide plate main body 10 can be eliminated, and the light can be uniformly emitted from the light guide plate, thereby improving the light-emitting uniformity of the backlight.
  • Mode 2 Referring to FIG. 5 , the first light source 20 and the second light source 21 are both disposed obliquely and at an angle of the same angle with the first light incident surface 11 .
  • the technical effects achieved by the arrangement of the first light source 20 and the second light source 21 shown in FIG. 5 are substantially the same as those achieved by the arrangement of the first light source 20 and the second light source 21 shown in FIG. I will not repeat them here.
  • the outgoing light of the first light source 20 and the second light source 21 has a certain divergence angle
  • the light can be gathered by changing the tilt angle of the first light source 20 and the second light source 21 with respect to the first light incident surface 11
  • the light emitted by the first light source 20 and the second light source 21 can be fully utilized to improve the utilization of light.
  • the light source arranged in the first mode and the second mode is suitable for the case where the width of the light guide plate main body 10 is small. If the width of the light guide plate main body 10 is large, it is necessary to set the light source in such a manner as to avoid low brightness of the central portion of the light guide plate main body 10.
  • the backlight further includes a third light source 22, and the third light source 22 and the top of the boss 30 Face 32 is opposite.
  • the top surface 32 of one of the bosses 30 may correspond to a third light source 22, or the top surface 32 of one of the bosses 30 may correspond to the plurality of third light sources 22, as needed.
  • the top surface 32 of the boss 30 can serve as a third light incident surface of the light guide plate.
  • the backlight further includes a back plate (not shown) on the outside of the light guide plate, and a plastic frame (not shown) connected to the back plate, and the reflector 40 is disposed on the back.
  • a back plate (not shown) on the outside of the light guide plate
  • a plastic frame (not shown) connected to the back plate, and the reflector 40 is disposed on the back.
  • the embodiment of the invention also provides a display device, including: a display panel and a device A backlight as mentioned in the above technical solution on the back side of the display panel.
  • a display device including: a display panel and a device A backlight as mentioned in the above technical solution on the back side of the display panel.
  • the uniformity of light emission of the backlight can be improved, thereby improving the display quality of the display device.
  • the display device may specifically be any product or component having a display function, such as a liquid crystal display device, an electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, and the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种导光板、背光源及显示装置，所述导光板包括导光板主体（10）和至少一个凸台（30），导光板主体（10）包括：第一入光面（11），与第一入光面（11）相交的第一出光面（12），以及与第一出光面（12）相对的第一底面（13）；凸台（30）设于第一入光面（11）上，凸台（30）包括：与第一入光面（11）贴合的第二底面，与第二底面相对的顶面（32），以及两端分别与顶面（32）和第二底面相交的两个端面和两个侧面，其中，顶面（32）的面积小于第二底面的面积，两个端面分别与第一底面（13）和第一出光面（12）平齐，两个侧面分别为可用作第二入光面的坡面（31）。该导光板用于改善背光源的出光均匀性。

Description

导光板、背光源及显示装置
相关申请的引用
本申请要求于2015年01月04日递交的中国专利申请号201520000638.5的优先权，在此引用该中国专利申请所公开的全部内容作为本申请的一部分。
技术领域
本发明涉及显示技术领域，尤其涉及一种导光板、背光源及显示装置。
背景技术
液晶显示装置因具有功耗低、寿命长和环保等优点而广泛应用于显示设备中。然而，由于液晶显示装置中的液晶面板本身不具有发光特性，因而，为了使液晶面板达到显示影像的目的，需要给液晶面板提供一个面光源装置，如背光源。背光源的作用在于向液晶面板供应亮度均匀的面光源，从而使液晶面板能够实现影像显示的目的。
在已有的背光源中，发光部件通常采用发光二极管(LightingEmitting Diode，以下简称LED)光源，其中主要利用LED光源的工作电压低、发光亮度高、响应速度快和寿命长等优点。然而，由于LED光源的出射光具有较强的光学指向性，即出射光具有一定的发散角度，因而，当LED光源的出射光直接从导光板的入光面进入导光板时，在导光板的出光面上将出现光学暗区。具体请参阅图1和2，当各第一光源20发出的光入射到导光板主体10的入光面11后，在出光面12靠近入光面11的一侧将出现光学暗区(图中以剖面线示出的区域)。该光学暗区主要分布在相邻的两个第一光源20之间，从而导致从出光面12射出的光不均匀，严重影响了背光源的出光均匀性。
发明内容
本发明的目的在于提供一种导光板、背光源及显示装置，以用于改善背光源的出光均匀性。
为了实现上述目的，本发明提供了一种导光板，包括：
导光板主体，所述导光板主体包括：第一入光面、与所述第一入光面 相交的第一出光面、以及与所述第一出光面相对的第一底面；以及
设于所述第一入光面上的至少一个凸台，所述凸台包括：与所述第一入光面贴合的第二底面、与所述第二底面相对的顶面、以及在两端分别与所述顶面和所述第二底面相交的两个端面和两个侧面，
其中，所述顶面的面积小于所述第二底面的面积，所述两个端面分别与所述第一底面和所述第一出光面平齐，并且所述两个侧面分别为可用作第二入光面的坡面。
优选地，所述凸台的所述两个坡面与所述第一入光面呈相同角度的夹角。
优选地，所述坡面为平面或弧面。
优选地，所述凸台与所述导光板主体为一体结构。
本发明同时还提供了一种背光源，包括：
如上述技术方案所述的导光板，所述导光板包括导光板主体和设于所述导光板主体的第一入光面上的至少一个凸台；
位于所述导光板旁且与所述导光板主体的第一入光面相对的反光板；以及
位于所述第一入光面和所述反光板之间的第一光源和第二光源，所述第一光源和所述第二光源分别位于所述第一入光面的两端，且分别朝向所述凸台的所述两个坡面。
优选地，所述第一光源和所述第二光源平行且正对设置。
优选地，所述第一光源和所述第二光源均倾斜设置，且分别与所述第一入光面呈相同角度的夹角。
优选地，所述背光源还包括第三光源，所述第三光源与所述凸台的顶面相对。
进一步地，上述背光源还包括位于所述导光板外侧的背板、以及与所述背板相连的胶框，所述反光板设于所述背板的侧壁上或所述胶框的侧壁上。
本发明同时还提供了一种显示装置，包括：显示面板、以及设于所述显示面板的背面上的如上述技术方案所述的背光源。
本发明提供的导光板包括导光板主体和设于导光板主体的第一入光面上的至少一个凸台，每个凸台的两个端面分别与导光板主体的第一底面和第一出光面平齐，并且每个凸台的两个侧面分别为可用作第二入光面的 坡面。当在背光源中采用该导光板导光时，在导光板主体的第一入光面的两端各设一个光源。由这两个光源发出的光的一部分将入射到凸台的坡面上，并经坡面折射后进入导光板主体中，由此可以消除形成在导光板主体的第一出光面上的光学暗区，使光从导光板均匀射出，从而改善背光源的出光均匀性，提高显示装置的显示品质。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，并构成本发明的一部分。本发明的示意性实施例及其说明仅用于解释本发明，而不构成对本发明的任何限制。在附图中：
图1为现有技术中的背光源的平面图；
图2为图1所示的背光源的立体图；
图3为本发明实施例中的导光板的立体图；
图4为本发明实施例中的背光源的平面图一；
图5为本发明实施例中的背光源的平面图二；并且
图6为本发明实施例中的背光源的平面图三。
附图标记：
10-导光板主体，  11-第一入光面，
12-第一出光面，  13-第一底面，
20-第一光源，    21-第二光源，
22-第三光源，    30-凸台，
31-坡面，        32-顶面，
40-反光板。
具体实施方式
为了进一步说明本发明所请求保护的导光板、背光源及显示装置，下面结合说明书附图进行详细描述。
请参阅图3，本发明实施例所提供的导光板包括导光板主体10和至少一个凸台30，其中，
导光板主体10包括：第一入光面11、与第一入光面11相交的第一出光面12、以及与第一出光面12相对的第一底面13；并且
凸台30包括：与第一入光面11贴合的第二底面(图中未标示)、与 第二底面相对的顶面32、以及在两端分别与顶面32和第二底面相交的两个端面(图中未标示)和两个侧面，其中，顶面32的面积小于第二底面的面积，两个端面分别与第一底面13和第一出光面12平齐，并且两个侧面分别为可用作第二入光面的坡面31。
具体地，第一入光面11、第一出光面12和第一底面13分别为导光板主体10的三个侧面。在图3中，第一入光面为导光板主体10的左侧面，第一出光面12为导光板主体10的上表面，而第一底面13为导光板主体10的下表面。凸台30设置在第一入光面11上，凸台30的上下两个端面分别与导光板主体10的第一出光面12和第一底面13平齐，凸台30的左右(前后)两个侧面分别为与第一入光面11呈一定角度的坡面31，且坡面31可充当导光板的第二入光面。优选地，凸台30的两个坡面31与第一入光面11呈相同角度的夹角，以提高从导光板主体10的第一出光面12射出的光的均匀性，并降低生产导光板的工艺难度。需要指出的是，上述坡面31具体可以为平面或弧面，并且凸台30的顶面32与入光面11可以平行，以便于背光源的后续组装。
当背光源中的导光板采用上述结构时，在导光板主体10的第一入光面11旁设有反光板和至少两个光源，各光源位于反光板和第一入光面11之间，并且光源中的两个位于第一入光面11的两端。在经过反光板反射、凸台30折射后，来自各光源的光的发散角增大，从而可以消除形成在导光板主体的第一出光面12上的光学暗区，使光从导光板均匀射出，进而改善背光源的出光均匀性。
请参阅图4和图5，本发明实施例同时还提供了一种背光源，包括：上述技术方案所提及的导光板，所述导光板包括导光板主体10和设于导光板主体10的第一入光面11上的至少一个凸台30；位于导光板旁且与导光板主体10的第一入光面11相对的反光板40；以及位于第一入光面11和反光板40之间的第一光源20和第二光源21，第一光源20和第二光源21分别位于第一入光面11的两端，且分别朝向凸台30的两个坡面31。
在上述背光源中，通过利用具有特定结构的导光板和与该导光板配合使用的两个光源，可以消除形成在导光板主体10的第一出光面12上的光学暗区，进而改善背光源的出光均匀性。导光板的结构在上文已描述，在此不再赘述。上述两个光源具体可以为LED光源，两个光源的设置方式主要有以下两种：
方式一：请继续参阅图4，第一光源20和第二光源21平行且正对设置。具体地，第一光源20和第二光源21分别位于第一入光面11的两端，第一光源20和第二光源21的出光面分别朝向凸台30的两个坡面31，且两个光源20平行正对设置。由第一光源20和第二光源21发出的光的一部分经第一入光面11折射后进入导光板主体10中，光的另一部分经坡面31折射后进入导光板主体10中，而其余光经反光板40反射、再经坡面31折射后进入导光板主体10中。由于位于第一入光面11的两端的第一光源20和第二光源21发出的光的一部分会入射到坡面31上，并在经坡面31折射后进入导光板主体10中，因此，可以消除形成在导光板主体10的第一出光面12上的光学暗区，使光从导光板均匀射出，进而改善背光源的出光均匀性。
方式二：请继续参阅图5，第一光源20和第二光源21均倾斜设置，且分别与第一入光面11呈相同角度的夹角。图5所示的第一光源20和第二光源21的排布方式所达到的技术效果与图4所示的第一光源20和第二光源21的排布方式所达到的技术效果基本相同，在此不再赘述。此外，由于第一光源20和第二光源21的出射光具有一定的发散角度，因此通过改变第一光源20和第二光源21相对于第一入光面11的倾斜角度，可以使光聚拢在反光板40和第一入光面11之间，从而可以充分利用第一光源20和第二光源21发出的光，提高光的利用率。
需要指出的是，按照上述方式一和方式二排布的光源适用于导光板主体10的宽度较小的情况。如果导光板主体10的宽度较大，则需要采用如下方式设置光源以避免导光板主体10的中部的低亮度。
方式三：请参阅图6，除了位于第一入光面11的两端的第一光源20和第二光源21外，上述背光源还包括第三光源22，第三光源22与凸台30的顶面32相对。具体地，一个凸台30的顶面32可以对应于一个第三光源22，或者一个凸台30的顶面32可以对应于多个第三光源22，具体根据需要设定。当凸台30的顶面32与至少一个第三光源22相对时，凸台30的顶面32可作为导光板的第三入光面。
在上述实施例的基础上，上述背光源还包括位于导光板外侧的背板(图中未画出)、以及与背板相连的胶框(图中未画出)，反光板40设于背板的侧壁上或胶框的侧壁上。
本发明实施例同时还提供了一种显示装置，包括：显示面板、以及设 于所述显示面板的背面上的如上述技术方案所提及的背光源。通过采用上述技术方案所提及的背光源，能够提高背光源的出光均匀性，因此提高显示装置的显示品质。需要指出的是，所述显示装置具体可以为液晶显示装置、电子纸、手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
在上述实施方式的描述中，具体特征、结构、材料或者特点可以在任何一个或多个实施例或示例中以任何合适的方式结合。
以上所述内容仅为本发明的具体实施方式，然而，本发明的保护范围并不局限于此。在本发明揭露的技术范围内，本领域的任何技术人员可容易想到许多变化或替换，并且所有这样的变化或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (10)

  1. 一种导光板，包括：
    导光板主体，所述导光板主体包括：第一入光面、与所述第一入光面相交的第一出光面、以及与所述第一出光面相对的第一底面；以及
    设于所述第一入光面上的至少一个凸台，所述凸台包括：与所述第一入光面贴合的第二底面、与所述第二底面相对的顶面、以及在两端分别与所述顶面和所述第二底面相交的两个端面和两个侧面，
    其中，所述顶面的面积小于所述第二底面的面积，所述两个端面分别与所述第一底面和所述第一出光面平齐，并且所述两个侧面分别为用作第二入光面的坡面。
  2. 根据权利要求1所述的导光板，其中，所述凸台的所述两个坡面与所述第一入光面呈相同角度的夹角。
  3. 根据权利要求1所述的导光板，其中，所述坡面为平面或弧面。
  4. 根据权利要求1-3中任一项所述的导光板，其中，所述凸台与所述导光板主体为一体结构。
  5. 一种背光源，包括：
    如权利要求1-4中任一项所述的导光板，所述导光板包括导光板主体和设于所述导光板主体的第一入光面上的至少一个凸台；
    位于所述导光板旁且与所述导光板主体的第一入光面相对的反光板；以及
    位于所述第一入光面和所述反光板之间的第一光源和第二光源，所述第一光源和所述第二光源分别位于所述第一入光面的两端，且分别朝向所述凸台的所述两个坡面。
  6. 根据权利要求5所述的背光源，其中，所述第一光源和所述第二光源平行且正对设置。
  7. 根据权利要求5所述的背光源，其中，所述第一光源和所述第二光源均倾斜设置，且分别与所述第一入光面呈相同角度的夹角。
  8. 根据权利要求5-7中任一项所述的背光源，其中，所述背光源还包括第三光源，所述第三光源与所述凸台的顶面相对。
  9. 根据权利要求5所述的背光源，还包括位于所述导光板外侧的背板、以及与所述背板相连的胶框，所述反光板设于所述背板的侧壁上或所 述胶框的侧壁上。
  10. 一种显示装置，包括：
    显示面板；以及
    设于所述显示面板的背面上的如权利要求5-9中任一项所述的背光源。
PCT/CN2015/076570 2015-01-04 2015-04-14 导光板、背光源及显示装置 WO2016107012A1 (zh)

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