WO2013155706A1 - 导光板及相应的背光模块 - Google Patents

导光板及相应的背光模块 Download PDF

Info

Publication number
WO2013155706A1
WO2013155706A1 PCT/CN2012/074453 CN2012074453W WO2013155706A1 WO 2013155706 A1 WO2013155706 A1 WO 2013155706A1 CN 2012074453 W CN2012074453 W CN 2012074453W WO 2013155706 A1 WO2013155706 A1 WO 2013155706A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflective
light
strip
prism
guide plate
Prior art date
Application number
PCT/CN2012/074453
Other languages
English (en)
French (fr)
Inventor
张光耀
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 US13/574,569 priority Critical patent/US8858056B2/en
Publication of WO2013155706A1 publication Critical patent/WO2013155706A1/zh

Links

Images

Classifications

    • 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

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a light guide plate and a corresponding backlight module capable of reducing edge leakage.
  • LCD Liquid crystal display Display
  • LCD monitors are mostly backlit LCD monitors, including LCD panels and backlight modules (Backlight Module).
  • the backlight module can be divided into a side-light type backlight module and a direct-lit light (Direct-light) according to the incident position of the light source.
  • Type Two types of backlight modules. More of them are used in the lateral light-in backlight module.
  • FIG. 1 is a schematic structural view of a conventional lateral light-incident backlight module having an upper prism light guide plate, and the lateral light-incident backlight module includes a light guide plate, a light source 12 , and a fixed plastic frame 13 .
  • the light guide plate is an upper prism light guide plate, that is, a plurality of mutually parallel outgoing strip prisms 110 are disposed on the light exit surface 115 of the light guide plate, and the cross-sectional direction X of the exit strip prism 110 is substantially parallel to the light incident surface of the light guide plate. 112.
  • Light source 12 is typically an LED light strip.
  • the fixing frame 13 is used to fix the light guide plate.
  • the light propagating along the extending direction Y of the outgoing strip prism 110 (substantially perpendicular to the light incident surface 112 of the light guide plate) can be caused by the total reflection relationship.
  • Spreading a long distance, the light propagating along the cross-sectional direction X of the outgoing strip prism 110 can only propagate a short distance due to the difficulty of total reflection, and thus has a certain convergence effect on the light of the light source 12, which can be improved.
  • FIG. 2A is a top structural view of a conventional lateral light-input backlight module having an upper prism light guide plate
  • FIG. 2B is a schematic structural view of the AA cross-section of FIG. 2A, due to the light guide plate exiting.
  • the strip prism 110 In the presence of the strip prism 110, the light reflected by the side surface 113 of the light guide plate is easily broken by the exit strip prism 110, causing light leakage B1 and B2 at the boundary between the light guide plate and the fixed bead frame 13, thereby affecting the corresponding The display quality of the liquid crystal display device.
  • the invention provides a light guide plate and a corresponding backlight module, and a reflective prism structure is arranged on both sides of the light guide plate to reduce the light leakage phenomenon at the junction between the light guide plate and the fixed plastic frame, and the existing upper prism light guide plate is conveniently solved.
  • the corresponding backlight module is susceptible to light leakage at the junction of the light guide plate and the fixed plastic frame.
  • the invention relates to a light guide plate, comprising: a plate body comprising a light incident surface, a light exit surface perpendicular to the light incident surface, and a side surface perpendicular to the light incident surface and the light exit surface, wherein the light exit surface comprises a reflection a region and a non-reflective region, the reflective region is located at both ends of the light-emitting surface near the side surface; an exiting prism structure disposed in the non-reflective region and comprising a plurality of mutually parallel outgoing strip prisms, the exit strip a longitudinal direction of the prism is perpendicular to the light incident surface and parallel to the side surface; and a reflective prism structure disposed on the reflective area of the light exiting surface for reflecting the emitted light back to the plate body; the reflective prism
  • the structure is a plane mirror; the light guide plate is obtained by hot pressing or rolling.
  • the invention also relates to a light guide plate, comprising: a plate body comprising a light incident surface, a light exit surface perpendicular to the light incident surface, and a side surface perpendicular to the light incident surface and the light exit surface, wherein the light exit surface comprises a reflective area and a non-reflective area, the reflective area is located at both ends of the light-emitting surface near the side surface; an exiting prism structure is disposed in the non-reflective area and includes a plurality of mutually parallel outgoing strip prisms, the exiting The longitudinal direction of the strip prism is perpendicular to the light incident surface and parallel to the side surface; and a reflective prism structure is disposed on the reflective area of the light exiting surface for reflecting the emitted light back to the plate body.
  • the reflective prism structure is a plane mirror.
  • the reflective prism structure includes a plurality of reflective strip prisms, the side faces being parallel to the length direction of the reflective strip prisms, and the aspect ratio of the reflective strip prisms adjacent to Gradually changing, the height and width of the reflective strip prism near the side are relatively small, and the height and width of the reflective strip prism away from the side are relatively large, wherein the aspect ratio is the height of the strip prism The ratio of the width.
  • the reflective prism structure comprises a plane mirror and a plurality of reflective strip prisms, the side faces being parallel to the length direction of the reflective strip prisms, adjacent to the height of the reflective strip prisms
  • the width ratio gradually changes, the plane mirror is close to the side surface, the reflective strip prism is away from the side surface, and the height of the reflective strip prism near the plane mirror is relatively small, and the reflection away from the plane mirror
  • the height and width of the strip prism are relatively large, wherein the aspect ratio is the ratio of the height to the width of the strip prism.
  • the aspect ratio of each of the exit strip prisms is equal, and the aspect ratio of the exit strip prism is greater than or equal to the maximum aspect ratio of the reflective strip prism.
  • the light guide plate of the present invention is produced by hot pressing or rolling.
  • the present invention relates to a backlight module, comprising: a light source; a light guide plate disposed on a side of the light emitting surface of the light source, comprising: a plate body including a light incident surface, a light exit surface perpendicular to the light incident surface, and simultaneously a side perpendicular to the light incident surface and the light exit surface, wherein the light exit surface includes a reflective area and a non-reflective area, the reflective area is located at both ends of the light exiting surface adjacent to the side surface; and an exiting prism structure is disposed at the non-reflecting surface
  • the reflective area includes a plurality of mutually parallel outgoing strip prisms, a length direction of the exit strip prism is perpendicular to the light incident surface and parallel to the side surface; and a reflective prism structure, a reflection disposed on the light exit surface a region for reflecting the emitted light back to the board; and a fixing frame for fixing the light guide plate through a portion of the light guide plate corresponding to
  • the reflective prism structure is a plane mirror.
  • the reflective prism structure includes a plurality of reflective strip prisms, the aspect ratio of the adjacent strip prisms is gradually changed, and the reflective strip prisms of the side surfaces are adjacent to the side
  • the height and width are relatively small, and the height and width of the reflective strip prism away from the side are relatively large, wherein the aspect ratio is a ratio of the height to the width of the strip prism.
  • the reflective prism structure includes a plane mirror and a plurality of reflective strip prisms, the aspect ratio of the adjacent strip prisms gradually changes, the plane mirror is close to the side surface, The reflective strip prism is away from the side surface, and the height and width of the reflective strip prism adjacent to the plane mirror are relatively small, and the height and width of the reflective strip prism away from the plane mirror are relatively large, wherein the aspect ratio is relatively large. It is the ratio of the height to the width of the strip prism.
  • the aspect ratio of each of the exit strip prisms is equal, and the aspect ratio of the exit strip prism is greater than or equal to the maximum aspect ratio of the reflective strip prism.
  • the light guide plate of the present invention is produced by hot pressing or rolling.
  • a reflective prism structure is disposed on both sides of the light guide plate to reduce light leakage at the interface between the light guide plate and the fixed plastic frame, and the existing upper prism light guide plate and the corresponding backlight module are disposed at the junction of the light guide plate and the fixed plastic frame.
  • FIG. 1 is a schematic structural view of a conventional lateral light-incorporating backlight module having an upper prism light guide plate;
  • 2A is a top plan view of a conventional lateral light-incorporating backlight module having an upper prism light guide plate;
  • FIG. 2B is a schematic structural view of the A-A cross section of FIG. 2A;
  • FIG. 3 is a schematic structural view of the first preferred embodiment of the light guide plate of the present invention as seen in the line A-A of FIG. 2A;
  • FIG. 4 is a schematic structural view of a second preferred embodiment of the light guide plate of the present invention taken along line A-A of FIG. 2A;
  • Figure 5 is a partial structural view of a light guide plate of the present invention.
  • Fig. 6 is a view showing the structure of a third preferred embodiment of the light guide plate of the present invention as seen in the line A-A of Fig. 2A.
  • FIG. 3 is a schematic structural view of the first preferred embodiment of the light guide plate of the present invention as seen from the line A-A of FIG. 2A.
  • the light guide plate comprises a plate body, an exiting prism structure 211 and a reflective prism structure 214.
  • the plate body comprises a light emitting surface 215, a light incident surface and two side surfaces 213.
  • the exit prism structure 211 comprises a plurality of exit strip prisms 210, which can be opposite.
  • the light has a certain convergence effect.
  • the reflective prism structure 214 is configured to reflect the emitted light near the side surface 213 of the light guide plate back to the plate body to reduce light leakage at both ends of the side surface 213 of the light guide plate.
  • the reflective prism structure 214 is a plane mirror.
  • the light incident surface of the light guide plate is perpendicular to the longitudinal direction of the outgoing strip prism 210, the side surface 213 is parallel to the longitudinal direction of the exit strip prism 210, and the light exit surface 215 is perpendicular to the side surface 213 and the light incident surface.
  • a plurality of exit strip prisms 210 are disposed on the light exit surface 215, and the exit strip prisms 210 are parallel to each other.
  • the longitudinal direction of the outgoing strip prism 210 is an extending direction C indicating the long side of the strip prism 210.
  • the light-emitting surface 215 of the light guide plate includes a reflective area E disposed at both ends of the light-emitting surface 215 near the side surface 213, and a plane mirror as the reflective prism structure 214 is disposed on the reflective area E of the light-emitting surface 215.
  • the exit strip prism 210 as the exit prism structure 211 is disposed on the non-reflection region of the light exit surface 215 (i.e., the region outside the reflection region E).
  • the plane mirror is disposed on the reflection region E of the light exit surface 215, the light emitted from the reflection region E of the light exit surface 215 easily satisfies the total reflection condition, and the plane mirror reflects the light back into the plate body.
  • the non-reflective area of the light-emitting surface 215 ie, the area other than the reflective area E
  • the outgoing strip-shaped prism 210 is provided with the outgoing strip-shaped prism 210, so that the corresponding light can be normally emitted to the corresponding display panel, and the strip-shaped prism can be ensured. Convergence function of 210.
  • the light guide plate reduces the light leakage at both ends of the side surface 213 and increases the light extraction efficiency of the non-reflection region of the light exit surface 215.
  • the planar mirror as the reflective prism structure 214 has a simple structure and can be formed simultaneously with the exiting prism structure 211 by hot pressing and rolling, and does not need to be separately fabricated, and the implementation process is simple and the cost is low.
  • FIG. 4 is a schematic structural view of the second preferred embodiment of the light guide plate of the present invention as viewed from the line A-A of FIG. 2A.
  • the reflective prism structure 214 is a plurality of reflective strip prisms whose longitudinal direction is parallel to the side surface 213 of the light guide plate, wherein the length direction of the reflective strip prism is Refers to the direction in which the long sides of the reflective strip prism extend.
  • FIG. 5 is a partial structural schematic view of a light guide plate of the present invention.
  • the ratio of the height H to the width D of the strip prisms (reflective strip prisms and exit strip prisms 210) in the present invention is defined as the aspect ratio of the strip prisms.
  • the aspect ratio of the adjacent reflective strip prisms gradually changes, wherein the height of the reflective strip prisms near the side surface 213 of the light guide plate is relatively small, and the strip prisms of the reflective strip prisms away from the side surface 213 of the light guide plate
  • the height and width are relatively large (here, the distance between the side surface 213 and the reflective strip prism refers to the distance between the reflective strip prism and the side surface 213 on the corresponding side of the light guide plate, as shown by the distance B in FIG. 4).
  • the aspect ratio of the exit strip prism 210 of the exit prism structure 211 is equal, and the aspect ratio of the exit strip prism 210 is greater than or equal to the maximum aspect ratio of the reflective strip prism (ie, the farthest from the corresponding side 213 of the light guide plate) The aspect ratio of the reflective strip prism).
  • the reflective strip prism is disposed on the reflection region E of the light exit surface 215, the height and width of the reflective strip prism are larger than the aspect ratio of the exit strip prism 210, and the light exit surface is also made.
  • the light emitted from the reflective area E of 215 is apt to satisfy the total reflection condition, so that the reflective strip prism can reflect most of the emitted light back into the plate.
  • the aspect ratio of the reflective strip prism is gradual, the surface of the entire light exit surface 215 is relatively flat and continuous, and the sudden change of the surface shape of the light exit surface 215 is avoided. Therefore, when the reflective prism structure 214 and the exit prism structure 211 are simultaneously produced by hot pressing and rolling, the yield is high, and defective products are less likely to occur.
  • FIG. 6 is a schematic structural view of the third preferred embodiment of the light guide plate of the present invention taken along line A-A of FIG. 2A.
  • the reflective prism structure 214 includes a plane mirror and a plurality of reflective strip prisms.
  • the length direction of the reflective strip prism is parallel to the side surface 213 of the light guide plate, and the height of the adjacent reflective strip prisms is high.
  • the width ratio gradually changes, and the plane mirror portion of the reflective prism structure 214 is adjacent to the corresponding side surface 213 of the light guide plate, and the reflective strip prism portion of the reflective prism structure 214 is away from the corresponding side surface 213 of the light guide plate.
  • the height of the reflective strip prism near the plane mirror is relatively small, and the height of the strip prism away from the plane mirror is relatively large.
  • the aspect ratio of the exit strip prism 210 of the exit prism structure 211 is equal, and the aspect ratio of the exit strip prism 210 is greater than or equal to the maximum aspect ratio of the reflective strip prism (ie, the farthest from the corresponding side 213 of the light guide plate) The aspect ratio of the reflective strip prism).
  • the present invention also relates to a backlight module including a light source, a light guide plate disposed on one side of the light emitting surface of the light source, and a fixed plastic frame.
  • the light source provides light for image display
  • the light guide plate is used to guide light emitted by the light source to The corresponding display panel.
  • the light guide plate comprises a plate body, an exiting prism structure and a reflective prism structure, wherein the plate body comprises a light emitting surface, a light incident surface and two side surfaces, and the exiting prism structure comprises a plurality of outgoing strip prisms, which can form a certain convergence on the outgoing light. effect.
  • the reflective prism structure is configured to reflect the emitted light near the side of the light guide plate back to the plate body to reduce light leakage at both ends of the light guide plate.
  • the light incident surface of the light guide plate is perpendicular to the longitudinal direction of the outgoing strip prism, the side surface is parallel to the longitudinal direction of the exit strip prism, and the light exit surface is perpendicular to the side surface and the light incident surface.
  • a plurality of exit strip prisms are disposed on the light exit surface, and the exit strip prisms are parallel to each other.
  • the longitudinal direction of the exit strip prism is to indicate the direction in which the long sides of the strip-shaped prism extend.
  • the light-emitting surface of the light guide plate comprises a reflective area and a non-reflective area, the reflective area is disposed at two ends of the light-emitting surface near the side surface, and the reflective prism structure is disposed on the reflective area of the light-emitting surface, and is disposed as an outgoing strip prism of the exit prism structure.
  • the fixing frame fixes the light guide plate through a portion of the corresponding light guide plate in the reflection area.
  • the reflective prism structure of the light guide plate of the backlight module of the present invention may be a plane mirror, a plurality of reflective strip prisms, or a combination of a plane mirror and a plurality of reflective strip prisms.
  • the corresponding area F of the light guide plate covered by the fixed plastic frame of the backlight module of the present invention is preferably smaller than the reflection area E of the light exit surface of the light guide plate, so that the light leakage at the junction between the light guide plate and the fixed plastic frame can be further reduced.
  • the size of the reflective area of the light guide plate does not limit the protection range of the present invention, as long as a reflective area is disposed at both ends of the light-emitting surface of the light guide plate near the side surface, and a reflective prism structure for enhancing light reflection is disposed on the reflective area. That is, it falls within the scope of protection of the present invention.
  • the light guide plate and the corresponding backlight module of the present invention are provided with reflective prism structures on both sides of the light guide plate to reduce light leakage at the junction between the light guide plate and the fixed plastic frame, and the existing upper prism guide is conveniently solved.
  • the light board and the corresponding backlight module are susceptible to light leakage at the junction of the light guide plate and the fixed plastic frame.

Landscapes

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

Abstract

一种导光板及相应的背光模块，导光板包括板体、出射棱镜结构（211）以及反射棱镜结构（214），反射棱镜结构（211）设置在板体的出光面的反射区域（E）。对于所述导光板及相应的背光模块，在导光板的两侧设置反射棱镜结构，以减小导光板和固定胶框交界处的漏光现象。

Description

导光板及相应的背光模块 技术领域
本发明涉及液晶显示领域，特别是涉及一种可减少边缘漏光的导光板及相应的背光模块。
 背景技术
液晶显示器(Liquid crystal display，LCD)已被广泛应用于各种电子产品中，液晶显示器大部分为背光型液晶显示器，其包括液晶面板及背光模块(Backlight module)。背光模块可依照光源入射位置的不同分成侧向式入光(Side-light type)背光模块与直下式入光(Direct-light type)背光模块两种。其中使用的较多的是侧向式入光背光模块。
为了尽量提高背光模块的亮度，设计者开发了一种上棱镜导光板（PLGP：Prism light guide plane）。如图1所示，图1为现有的具有上棱镜导光板的侧向式入光背光模块的结构示意图，该侧向式入光背光模块包括导光板、光源12以及固定胶框13。该导光板为一种上棱镜导光板，即在导光板的出光面115设置多个相互平行的出射条状棱镜110，该出射条状棱镜110的截面方向X基本平行于导光板的入光面112。光源12一般为LED灯条。固定胶框13用于固定导光板。当光源12的光从入光面112进入到导光板后，沿着出射条状棱镜110的延伸方向Y（基本垂直于导光板的入光面112）传播的光，因全反射的关系而能传播较远的距离，而沿出射条状棱镜110的截面方向X传播的光，则因不易产生全反射而仅能传播较短的距离，因而对光源12的光线具有一定的会聚作用，可提高光源12的使用效率。
如图2A和图2B所示，图2A为现有的具有上棱镜导光板的侧向式入光背光模块的俯视结构图，图2B为图2A的A-A截面的结构示意图，由于导光板的出射条状棱镜110的存在，通过导光板的侧面113反射回来的光线容易被出射条状棱镜110破坏全反射，造成导光板和固定胶框13的交界处产生漏光B1和B2，从而影响了相应的液晶显示装置的显示品质。
故，有必要提供一种导光板及相应的背光模块，以解决现有技术所存在的问题。
 技术问题
本发明提供一种导光板及相应的背光模块，在导光板的两侧设置反射棱镜结构，以减小导光板和固定胶框交界处的漏光现象，方便的解决了现有上棱镜导光板及相应的背光模块在导光板和固定胶框交界处易产生漏光的技术问题。
 技术解决方案
本发明涉及一种导光板，其中包括：板体，包括入光面、垂直于所述入光面的出光面、以及同时垂直于入光面和出光面的侧面，其中所述出光面包括反射区域和非反射区域，所述反射区域位于所述出光面靠近所述侧面的两端；出射棱镜结构，设置在所述非反射区域并包括多个相互平行的出射条状棱镜，所述出射条状棱镜的长度方向垂直于所述入光面且平行于所述侧面；以及反射棱镜结构，设置在所述出光面的反射区域，用于将出射光线反射回所述板体；所述反射棱镜结构为平面镜；所述导光板通过热压或滚压方式制得。
本发明还涉及一种导光板，其中包括：板体，包括入光面、垂直于所述入光面的出光面、以及同时垂直于入光面和出光面的侧面，其中所述出光面包括反射区域和非反射区域，所述反射区域位于所述出光面靠近所述侧面的两端；出射棱镜结构，设置在所述非反射区域并包括多个相互平行的出射条状棱镜，所述出射条状棱镜的长度方向垂直于所述入光面且平行于所述侧面；以及反射棱镜结构，设置在所述出光面的反射区域，用于将出射光线反射回所述板体。
在本发明所述的导光板中，所述反射棱镜结构为平面镜。
在本发明所述的导光板中，所述反射棱镜结构包括多个反射条状棱镜，所述侧面平行于所述反射条状棱镜的长度方向，相邻所述反射条状棱镜的高宽比逐渐变化，靠近所述侧面的所述反射条状棱镜的高宽比较小，远离所述侧面的所述反射条状棱镜的高宽比较大，其中所述高宽比为条状棱镜的高度与宽度的比值。
在本发明所述的导光板中，所述反射棱镜结构包括平面镜和多个反射条状棱镜，所述侧面平行于所述反射条状棱镜的长度方向，相邻所述反射条状棱镜的高宽比逐渐变化，所述平面镜靠近所述侧面，所述反射条状棱镜远离所述侧面，且靠近所述平面镜的所述反射条状棱镜的高宽比较小，远离所述平面镜的所述反射条状棱镜的高宽比较大，其中所述高宽比为条状棱镜的高度与宽度的比值。
在本发明所述的导光板中，每个所述出射条状棱镜的高宽比相等，且所述出射条状棱镜的高宽比大于或等于所述反射条状棱镜的最大高宽比。
在本发明所述的导光板中，所述导光板通过热压或滚压方式制得。
本发明涉及一种背光模块，其中包括：光源；导光板，设置在所述光源的发光面一侧，包括：板体，包括入光面、垂直于所述入光面的出光面、以及同时垂直于入光面和出光面的侧面，其中所述出光面包括反射区域和非反射区域，所述反射区域位于所述出光面靠近所述侧面的两端；出射棱镜结构，设置在所述非反射区域并包括多个相互平行的出射条状棱镜，所述出射条状棱镜的长度方向垂直于所述入光面且平行于所述侧面；以及反射棱镜结构，设置在所述出光面的反射区域，用于将出射光线反射回所述板体；以及固定胶框，用于通过所述反射区域对应的所述导光板的部分，固定所述导光板。
在本发明所述的背光模块中，所述反射棱镜结构为平面镜。
在本发明所述的背光模块中，所述反射棱镜结构包括多个反射条状棱镜，相邻所述反射条状棱镜的高宽比逐渐变化，靠近所述侧面的所述反射条状棱镜的高宽比较小，远离所述侧面的所述反射条状棱镜的高宽比较大，其中所述高宽比为条状棱镜的高度与宽度的比值。
在本发明所述的背光模块中，所述反射棱镜结构包括平面镜和多个反射条状棱镜，相邻所述反射条状棱镜的高宽比逐渐变化，所述平面镜靠近所述侧面，所述反射条状棱镜远离所述侧面，且靠近所述平面镜的所述反射条状棱镜的高宽比较小，远离所述平面镜的所述反射条状棱镜的高宽比较大，其中所述高宽比为条状棱镜的高度与宽度的比值。
在本发明所述的背光模块中，每个所述出射条状棱镜的高宽比相等，且所述出射条状棱镜的高宽比大于或等于所述反射条状棱镜的最大高宽比。
在本发明所述的导光板中，所述导光板通过热压或滚压方式制得。
 有益效果
在导光板的两侧设置反射棱镜结构，以减小导光板和固定胶框交界处的漏光现象，方便的解决了现有上棱镜导光板及相应的背光模块在导光板和固定胶框交界处易产生漏光的技术问题。
 附图说明
图1为现有的具有上棱镜导光板的侧向式入光背光模块的结构示意图；
图2A为现有的具有上棱镜导光板的侧向式入光背光模块的俯视结构图；
图2B为图2A的A-A截面的结构示意图；
图3为本发明的导光板的第一优选实施例按图2A的A-A截面线所视的结构示意图；
图4为本发明的导光板的第二优选实施例在图2A的A-A截面线所视的结构示意图；
图5为本发明的导光板的局部结构示意图；
图6为本发明的导光板的第三优选实施例在图2A的A-A截面线所视的结构示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
在图中，结构相似的单元是以相同标号表示。
请参照图2A和图3，图3为本发明的导光板的第一优选实施例按图2A的A-A截面线所视的结构示意图。该导光板包括板体、出射棱镜结构211以及反射棱镜结构214，其中板体包括出光面215、入光面以及两个侧面213，出射棱镜结构211包括多个出射条状棱镜210，可对出射光起到一定的会聚作用。反射棱镜结构214用于将靠近导光板的侧面213的出射光线反射回板体，以减少导光板侧面213两端的漏光。在本实施例中，反射棱镜结构214为平面镜。
导光板的入光面垂直于出射条状棱镜210的长度方向，侧面213平行于出射条状棱镜210的长度方向，出光面215同时垂直于侧面213和入光面。多个出射条状棱镜210设置在出光面215上，出射条状棱镜210之间相互平行。出射条状棱镜210的长度方向是指出射条状棱镜210的长边的延伸方向C。导光板的出光面215包括反射区域E和非反射区域，该反射区域E设置在出光面215的靠近侧面213的两端，作为反射棱镜结构214的平面镜设置在出光面215的反射区域E上，作为出射棱镜结构211的出射条状棱镜210则设置在出光面215的非反射区域（即反射区域E之外的区域）上。
本发明的导光板使用时，由于在出光面215的反射区域E上设置有平面镜，使得从出光面215的反射区域E出射的光线易满足全反射条件，从而平面镜将该光线反射回板体内。而出光面215的非反射区域（即反射区域E之外的区域）由于设置有出射条状棱镜210，可以正常的将相应的光线出射到相应的显示面板上，同时还能保证出射条状棱镜210的会聚功能。这样导光板既减少了在侧面213两端的漏光，又增加了出光面215的非反射区域的出光效率。
作为反射棱镜结构214的平面镜结构简单，可以通过热压和滚压的方式，和出射棱镜结构211同时成型，不需要另外制作，实现过程简单、成本低。
请参照图2A和图4，图4为本发明的导光板的第二优选实施例在图2A的A-A截面线所视的结构示意图。本实施例与第一优选实施例的区别在于，反射棱镜结构214为多个反射条状棱镜，该反射条状棱镜的长度方向平行于导光板的侧面213，其中反射条状棱镜的长度方向是指反射条状棱镜的长边的延伸方向。如图5所示，图5为本发明的导光板的局部结构示意图。在本发明中条状棱镜（反射条状棱镜和出射条状棱镜210）的高度H和宽度D的比值定义为条状棱镜的高宽比。在本实施例中，相邻的反射条状棱镜的高宽比逐渐变化，其中靠近导光板的侧面213的反射条状棱镜的高宽比较小，远离导光板的侧面213的反射条状棱镜的高宽比较大（这里侧面213与反射条状棱镜的距离是指反射条状棱镜与导光板相应一侧的侧面213的距离，如图4中的距离B）。同时出射棱镜结构211的出射条状棱镜210的高宽比相等，且出射条状棱镜210的高宽比大于或等于反射条状棱镜的最大高宽比（即离导光板的相应侧面213最远的反射条状棱镜的高宽比）。
本发明的导光板使用时，由于在出光面215的反射区域E上设置有反射条状棱镜，该反射条状棱镜的高宽比较出射条状棱镜210的高宽比大，也使得从出光面215的反射区域E出射的光线易满足全反射条件，从而反射条状棱镜可以将大部分的出射光线反射回板体内。
同时由于反射条状棱镜的高宽比是渐变的，使得整个出光面215的表面较为平整连续，避免了出光面215表面形状的突变。因此通过热压和滚压同时制作反射棱镜结构214和出射棱镜结构211时，成品率较高，不容易出现不良品。
本实施例的其他技术特征和有益效果，与第一优选实施例相同或相似，请参见第一优选实施例。
请参照图6，图6为本发明的导光板的第三优选实施例在图2A的A-A截面线所视的结构示意图。本实施例与第二优选实施例的区别在于，反射棱镜结构214包括平面镜和多个反射条状棱镜，反射条状棱镜的长度方向平行于导光板的侧面213，相邻反射条状棱镜的高宽比逐渐变化，反射棱镜结构214的平面镜部分靠近导光板的相应侧面213，反射棱镜结构214的反射条状棱镜部分远离导光板的相应侧面213。靠近平面镜的反射条状棱镜的高宽比较小，远离平面镜的反射条状棱镜的高宽比较大。同时出射棱镜结构211的出射条状棱镜210的高宽比相等，且出射条状棱镜210的高宽比大于或等于反射条状棱镜的最大高宽比（即离导光板的相应侧面213最远的反射条状棱镜的高宽比）。
在本实施例中同样避免了出光面215的表面形状的突变。本实施例的其他技术特征和有益效果，与第二优选实施例相同或相似，请参见第二优选实施例。
本发明还涉及一种背光模块，该背光模块包括光源、设置在光源的发光面一侧的导光板以及固定胶框，光源提供光线用于图像显示，导光板用于将光源发出的光引导至相应的显示面板。该导光板包括板体、出射棱镜结构以及反射棱镜结构，其中板体包括出光面、入光面以及两个侧面，出射棱镜结构包括多个出射条状棱镜，可对出射光起到一定的会聚作用。反射棱镜结构用于将靠近导光板的侧面的出射光线反射回板体，以减少导光板侧面两端的漏光。导光板的入光面垂直于出射条状棱镜的长度方向，侧面平行于出射条状棱镜的长度方向，出光面同时垂直于侧面和入光面。多个出射条状棱镜设置在出光面上，出射条状棱镜之间相互平行。出射条状棱镜的长度方向是指出射条状棱镜的长边的延伸方向。导光板的出光面包括反射区域和非反射区域，该反射区域设置在出光面的靠近侧面的两端，反射棱镜结构设置在出光面的反射区域上，作为出射棱镜结构的出射条状棱镜则设置在出光面的非反射区域上。固定胶框通过反射区域相应的导光板的部分，固定导光板。本发明的背光模块的导光板的反射棱镜结构可以是平面镜、多个反射条状棱镜、或平面镜与多个反射条状棱镜的组合。
如图3所示，本发明的背光模块的固定胶框覆盖的导光板的相应区域F优选小于导光板出光面的反射区域E，这样可以进一步减小导光板和固定胶框交界处的漏光现象，但导光板的反射区域的大小并不限制本发明的保护范围，只要在导光板的出光面的靠近侧面的两端设置有反射区域，且在反射区域上设置有加强光反射的反射棱镜结构即属于本发明的保护范围。
本发明的背光模块的工作原理和有益效果，与上述的导光板的具体实施例中描述的相同或相似，具体请参见上述导光板的具体实施例。
由上述可知，本发明的导光板及相应的背光模块，在导光板的两侧设置反射棱镜结构，以减小导光板和固定胶框交界处的漏光现象，方便的解决了现有上棱镜导光板及相应的背光模块在导光板和固定胶框交界处易产生漏光的技术问题。
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 (15)

  1. 一种导光板，其中包括：
    板体，包括入光面、垂直于所述入光面的出光面、以及同时垂直于入光面和出光面的侧面，其中所述出光面包括反射区域和非反射区域，所述反射区域位于所述出光面靠近所述侧面的两端；
    出射棱镜结构，设置在所述非反射区域并包括多个相互平行的出射条状棱镜，所述出射条状棱镜的长度方向垂直于所述入光面且平行于所述侧面；以及
    反射棱镜结构，设置在所述出光面的反射区域，用于将出射光线反射回所述板体；
    所述反射棱镜结构为平面镜；
    所述导光板通过热压或滚压方式制得。
  2. 一种导光板，其中包括：
    板体，包括入光面、垂直于所述入光面的出光面、以及同时垂直于入光面和出光面的侧面，其中所述出光面包括反射区域和非反射区域，所述反射区域位于所述出光面靠近所述侧面的两端；
    出射棱镜结构，设置在所述非反射区域并包括多个相互平行的出射条状棱镜，所述出射条状棱镜的长度方向垂直于所述入光面且平行于所述侧面；以及
    反射棱镜结构，设置在所述出光面的反射区域，用于将出射光线反射回所述板体。
  3. 根据权利要求2所述的导光板，其中所述反射棱镜结构为平面镜。
  4. 根据权利要求2所述的导光板，其中所述反射棱镜结构包括多个反射条状棱镜，所述侧面平行于所述反射条状棱镜的长度方向，相邻所述反射条状棱镜的高宽比逐渐变化，靠近所述侧面的所述反射条状棱镜的高宽比较小，远离所述侧面的所述反射条状棱镜的高宽比较大，其中所述高宽比为条状棱镜的高度与宽度的比值。
  5. 根据权利要求2所述的导光板，其中所述反射棱镜结构包括平面镜和多个反射条状棱镜，所述侧面平行于所述反射条状棱镜的长度方向，相邻所述反射条状棱镜的高宽比逐渐变化，所述平面镜靠近所述侧面，所述反射条状棱镜远离所述侧面，且靠近所述平面镜的所述反射条状棱镜的高宽比较小，远离所述平面镜的所述反射条状棱镜的高宽比较大，其中所述高宽比为条状棱镜的高度与宽度的比值。
  6. 根据权利要求4所述的导光板，其中每个所述出射条状棱镜的高宽比相等，且所述出射条状棱镜的高宽比大于或等于所述反射条状棱镜的最大高宽比。
  7. 根据权利要求5所述的导光板，其中每个所述出射条状棱镜的高宽比相等，且所述出射条状棱镜的高宽比大于或等于所述反射条状棱镜的最大高宽比。
  8. 根据权利要求2所述的导光板，其中所述导光板通过热压或滚压方式制得。
  9. 一种背光模块，其中包括：
    光源；
    导光板，设置在所述光源的发光面一侧，包括：
    板体，包括入光面、垂直于所述入光面的出光面、以及同时垂直于入光面和出光面的侧面，其中所述出光面包括反射区域和非反射区域，所述反射区域位于所述出光面靠近所述侧面的两端；
    出射棱镜结构，设置在所述非反射区域并包括多个相互平行的出射条状棱镜，所述出射条状棱镜的长度方向垂直于所述入光面且平行于所述侧面；以及
    反射棱镜结构，设置在所述出光面的反射区域，用于将出射光线反射回所述板体；以及
    固定胶框，用于通过所述反射区域对应的所述导光板的部分，固定所述导光板。
  10. 根据权利要求9所述的背光模块，其中所述反射棱镜结构为平面镜。
  11. 根据权利要求9所述的背光模块，其中所述反射棱镜结构包括多个反射条状棱镜，相邻所述反射条状棱镜的高宽比逐渐变化，靠近所述侧面的所述反射条状棱镜的高宽比较小，远离所述侧面的所述反射条状棱镜的高宽比较大，其中所述高宽比为条状棱镜的高度与宽度的比值。
  12. 根据权利要求9所述的背光模块，其中所述反射棱镜结构包括平面镜和多个反射条状棱镜，相邻所述反射条状棱镜的高宽比逐渐变化，所述平面镜靠近所述侧面，所述反射条状棱镜远离所述侧面，且靠近所述平面镜的所述反射条状棱镜的高宽比较小，远离所述平面镜的所述反射条状棱镜的高宽比较大，其中所述高宽比为条状棱镜的高度与宽度的比值。
  13. 根据权利要求11所述的背光模块，其中每个所述出射条状棱镜的高宽比相等，且所述出射条状棱镜的高宽比大于或等于所述反射条状棱镜的最大高宽比。
  14. 根据权利要求12所述的背光模块，其中每个所述出射条状棱镜的高宽比相等，且所述出射条状棱镜的高宽比大于或等于所述反射条状棱镜的最大高宽比。
  15. 根据权利要求9所述的背光模块，其中所述导光板通过热压或滚压方式制得。
PCT/CN2012/074453 2012-04-18 2012-04-20 导光板及相应的背光模块 WO2013155706A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/574,569 US8858056B2 (en) 2012-04-18 2012-04-20 Light guide plate and corresponding backlight module

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210113728.6 2012-04-18
CN2012101137286A CN102759772A (zh) 2012-04-18 2012-04-18 导光板及相应的背光模块

Publications (1)

Publication Number Publication Date
WO2013155706A1 true WO2013155706A1 (zh) 2013-10-24

Family

ID=47054278

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/074453 WO2013155706A1 (zh) 2012-04-18 2012-04-20 导光板及相应的背光模块

Country Status (2)

Country Link
CN (1) CN102759772A (zh)
WO (1) WO2013155706A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104076421A (zh) * 2014-06-20 2014-10-01 合肥京东方显示光源有限公司 黑边棱镜片，棱镜片的制造方法、制造设备及显示装置
CN104259265B (zh) * 2014-08-13 2017-02-01 烽火通信科技股份有限公司 不锈钢带铠装光缆生产方法及其生产装置
KR20160042226A (ko) 2014-10-07 2016-04-19 엘지디스플레이 주식회사 백라이트 유닛 및 이를 구비한 액정표시장치
TWI560479B (en) * 2015-07-07 2016-12-01 Chi Mei Corp Light guide plate, and backlight module and liquid crystal display apparatus using the same
CN107884990B (zh) * 2017-11-30 2022-02-22 武汉天马微电子有限公司 一种背光模组及显示装置
CN108490531B (zh) 2018-04-12 2022-10-25 京东方科技集团股份有限公司 背光源装置、导光板以及显示装置
CN109560213B (zh) * 2018-11-30 2021-03-02 武汉天马微电子有限公司 显示面板和显示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10123332A (ja) * 1996-10-17 1998-05-15 Enplas Corp サイドライト型面光源装置
US20070177403A1 (en) * 2006-01-31 2007-08-02 Chunghwa Picture Tubes, Ltd. Prism of backlight module and structure thereof
CN101351728A (zh) * 2006-11-29 2009-01-21 株式会社帝诺斯 背光部件及其中包含的光学片的制造方法
CN102313195A (zh) * 2010-07-06 2012-01-11 乐金显示有限公司 用于制造导光板的装置和具有该导光板的背光单元

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1196016C (zh) * 2000-10-20 2005-04-06 三菱电机株式会社 液晶显示装置用背光
CN100495159C (zh) * 2007-02-12 2009-06-03 友达光电股份有限公司 背光模块及其使用的导光板定位外框
CN101266354B (zh) * 2007-03-15 2013-09-18 群创光电股份有限公司 背光模组及其应用装置
CN101413641B (zh) * 2008-12-03 2011-04-06 友达光电股份有限公司 导光板与背光模块

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10123332A (ja) * 1996-10-17 1998-05-15 Enplas Corp サイドライト型面光源装置
US20070177403A1 (en) * 2006-01-31 2007-08-02 Chunghwa Picture Tubes, Ltd. Prism of backlight module and structure thereof
CN101351728A (zh) * 2006-11-29 2009-01-21 株式会社帝诺斯 背光部件及其中包含的光学片的制造方法
CN102313195A (zh) * 2010-07-06 2012-01-11 乐金显示有限公司 用于制造导光板的装置和具有该导光板的背光单元

Also Published As

Publication number Publication date
CN102759772A (zh) 2012-10-31

Similar Documents

Publication Publication Date Title
WO2013155706A1 (zh) 导光板及相应的背光模块
WO2014089873A1 (zh) 窄边框液晶模块及其胶框
WO2013020327A1 (zh) 背光模组及液晶显示器
WO2013189100A1 (zh) 背光模组及液晶显示装置
WO2012051767A1 (zh) 背光模块
WO2014026408A1 (zh) 背光模块以及其相关液晶显示设备
WO2014075305A1 (zh) 一种防漏光的侧入式背光的液晶模组及液晶显示器
US9817178B2 (en) Backlight module and display device
WO2013170509A1 (zh) 散热铝挤结构及相应的背光模块
WO2013060049A1 (zh) 导光板、背光模组和液晶显示装置
WO2013071590A1 (zh) 背框以及背光系统
WO2016165293A1 (zh) 直下式背光模组及液晶显示装置
WO2017148017A1 (zh) 一种背光模组及液晶显示器
CN102878484A (zh) 一种背光模组及液晶显示器
WO2013071598A1 (zh) 背光系统
WO2020124891A1 (zh) 背光模组及显示装置
WO2013155702A1 (zh) 背光模块以及液晶显示装置
WO2013139050A1 (zh) 背光模块以及液晶显示装置
WO2013177805A1 (zh) 背光模组
WO2013152500A1 (zh) 背光模块及相应的液晶显示装置
WO2014071646A1 (zh) 一种日光辅助的直下式背光模组及液晶显示器
WO2013149413A1 (zh) 背光模组
WO2013134971A1 (zh) 背光模块以及液晶显示装置
US10656325B2 (en) Liquid crystal display and backlight module thereof
CN104633527A (zh) 背光模组

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 13574569

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12874586

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12874586

Country of ref document: EP

Kind code of ref document: A1