WO2012136025A1 - 导光板、液晶显示模组及液晶显示器 - Google Patents

导光板、液晶显示模组及液晶显示器 Download PDF

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Publication number
WO2012136025A1
WO2012136025A1 PCT/CN2011/076877 CN2011076877W WO2012136025A1 WO 2012136025 A1 WO2012136025 A1 WO 2012136025A1 CN 2011076877 W CN2011076877 W CN 2011076877W WO 2012136025 A1 WO2012136025 A1 WO 2012136025A1
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WIPO (PCT)
Prior art keywords
light
liquid crystal
crystal display
guide plate
light guide
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Ceased
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PCT/CN2011/076877
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English (en)
French (fr)
Inventor
俞刚
任杰
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US13/258,461 priority Critical patent/US20120249921A1/en
Publication of WO2012136025A1 publication Critical patent/WO2012136025A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B6/0015—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
    • G02B6/0018—Redirecting means on the surface 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
    • G02B6/0013—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
    • G02B6/0033—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
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles

Definitions

  • the invention relates to a light guide plate, a liquid crystal display module and a liquid crystal display, in particular to a light guide plate, a liquid crystal display module and a liquid crystal display which can realize a narrow frame design, and belongs to the technical field of liquid crystal.
  • LED Light Emitting Diode (light-emitting diode) light source
  • the edge-lit LED backlight module is a optimistic development direction of liquid crystal technology because of its cost advantages.
  • FIG. 1 The architecture of most of the edge-lit LED backlight modules in the prior art is as shown in FIG. 1 , which includes a light bar 110 and a light guide plate 200 , and the light bar 110 is placed in parallel with the light guide plate 200 .
  • the edge-lit LED backlight module reduce the LED in actual use, which effectively reduces the cost, but this will lead to a more obvious hotspot phenomenon.
  • the main object of the present invention is to provide a light guide plate, a liquid crystal display module and a liquid crystal display, which are intended to effectively improve the problem of the frame being enlarged due to the increase of the light mixing distance, and realize the narrow frame design.
  • the present invention provides a light guide plate having an L shape and being divided into a long section and a short section; the long section includes a light emitting surface and an inner side opposite thereto; the short section is on the same One side of the inner side intersecting is a light incident surface; the LED light strip is located below the inner side surface, is disposed on one side of the light incident surface, and the light emitting surface is disposed in parallel with the light incident surface, and the light is from The light incident surface is incident and is reflected by the reflecting plate to the long exit light emitting surface.
  • the long and short segments are bonded.
  • the long section and the short section are integrally provided.
  • a reflective sheet is provided on the inner side of the long section.
  • a plurality of grooves are arranged on the light-emitting surface of the long section, and a mesh point is arranged around the groove.
  • the grooves are arranged in a V shape, an arc shape or a rectangle.
  • the reflecting surface of the light guide plate is a slope.
  • the invention provides a liquid crystal display module, comprising a light guide plate, a reflector plate and an LED light bar, wherein the light guide plate is L-shaped and is divided into a long segment and a short segment; the long segment comprises a light emitting surface and opposite thereto An inner side surface; a side of the short section intersecting the inner side surface is a light incident surface; the LED light strip is located below the inner side surface, disposed on one side of the light incident surface, and the light emitting surface and the light emitting surface thereof The light surfaces are arranged in parallel, and the light is incident from the light incident surface and reflected by the reflection plate to the long light exit surface.
  • the reflecting plate is arranged in an arc shape.
  • the present invention provides a liquid crystal display comprising a liquid crystal display module, the liquid crystal display module comprising a light guide plate, a reflective plate and an LED light bar, wherein the light guide plate is L-shaped and is divided into a long segment and a short segment;
  • the long section includes a light emitting surface and an inner side surface opposite thereto; a side of the short section intersecting the inner side surface is a light incident surface;
  • the LED light strip is located below the inner side surface, and is disposed on the light incident surface a side, and a light exit surface is disposed in parallel with the light incident surface, the light is incident from the light incident surface, and is reflected by the reflective plate to the long light exit surface;
  • the long and short segments of the light guide plate are integrally disposed or Bonding settings.
  • the light guide plate is arranged in sections, and the light emitted by the LED light bar is incident from a short section of the light guide plate, and is reflected by the reflection plate to the long-side light-emitting surface, thereby being Effectively improve the problem of the frame being enlarged due to the increased mixing distance, and realize the narrow frame design, thereby saving the raw materials used in the front frame and the plastic frame, so that the appearance of the whole machine can be designed more simply.
  • FIG. 1 is a schematic structural view of a light guide plate and an LED light bar in the prior art
  • FIG. 2 is a schematic structural view of a liquid crystal display module according to a preferred embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a light guide plate according to a preferred embodiment of the present invention.
  • FIG. 4 is a schematic view showing a connection structure of a light guide plate according to a preferred embodiment of the present invention.
  • FIG. 5 is a schematic structural view of a reflector according to a preferred embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a reflector according to a preferred embodiment of the present invention.
  • the general idea of the invention is to set the light guide plate to be folded, and the LED light bar is disposed under the long section, thereby saving the internal space of the body and realizing the narrow frame design.
  • the liquid crystal display module includes a light guide plate 210, a reflective plate 310, and an LED light bar 110.
  • the light guide plate 210 is L-shaped and is divided into long segments 211 and a short section 212; the long section 211 includes a light emitting surface 2111 and an inner side surface 2112 opposite thereto; a side of the short section 212 intersecting the inner side surface 2112 is a light incident surface 2121; the LED light strip 110 is located inside A side of the side surface 2112 is disposed on a side of the light incident surface 2121, and a light emitting surface is disposed in parallel with the light incident surface 2121. Light is incident from the light incident surface 2121 and is reflected by the reflecting plate 310 to the long section. The light surface of 211.
  • the liquid crystal module of the present invention can be applied to a liquid crystal display.
  • the liquid crystal display further includes a front frame and a rear frame (not shown), wherein the front frame is connected.
  • the light guide plate 210 is disposed inside the front frame relative to the user. Since the light guide plate 210 is disposed in an L shape, the front frame can save at least the width of the short segment 212, and can cover the entire module, thereby saving the side width of the front frame, thereby realizing a narrow bezel design and making the whole appearance of the liquid crystal display. More concise, the display area is relatively larger.
  • the long section 211 of the light guide plate 210 is connected to the short section 212 in a plurality of ways, and can be flexibly selected.
  • the long section 211 and the short section 212 are integrally disposed, and the light guide plate 210 disposed in an integral manner can be obtained, for example, by mold molding or the like.
  • the long section 211 and the short section 212 of the light guide plate 210 are arranged in a split manner, and are connected together by UV glue or a currently available connection manner, such as fastening, plugging, and the like.
  • a fastening structure may be disposed on the short section 212 and the long section 211, for example, a buckle is disposed on the long section 211 or the short section 212, and a buckle groove adapted to the buckle is disposed on the other section.
  • the cymbal cooperates with the buckle groove to connect the long section 211 with the short section 212.
  • a plug-in having the same material as the light guide plate 210 may be disposed, and both ends are provided with hooks that are respectively inserted into the long section 211 and the short section 212 to connect the two together.
  • FIG. 4 there is another connection form of the split type long section 211 and the short section 212.
  • the difference between this embodiment and the foregoing embodiment is that, on the short segment 212, the upper portion of the light incident surface 2121 is connected to the long segment 211. Both are connected by UV glue 400 or existing available connecting parts.
  • a reflective sheet may be attached to the inner side surface 2112 and above the LED strip 110 to prevent light from directly penetrating the long section 211, thereby causing local light leakage.
  • a groove may be disposed on the light-emitting surface 2111, and a plurality of dots may be disposed on the groove, so that the light of the point source is scattered through the groove and the dot.
  • the grooves may be V-shaped, curved or rectangular.
  • the shape of the reflecting surface of the reflecting plate 310 and the light guiding plate 210 can be variously selected.
  • the reflecting surface of the light guiding plate 210 is a slope.
  • the reflecting plate 310 is disposed in a circular arc shape.
  • the liquid crystal display module further includes a back plate which can form a back frame and is located outside the reflection plate 310.
  • the LED light bar 110 can also directly contact the back plate to provide a heat dissipation channel and reduce the influence of heat on the performance of the component.
  • the present invention also provides a liquid crystal display having the above liquid crystal display module.
  • the liquid crystal display module is provided with the light guide plate 210, the reflection plate 310 and the LED light bar 110.
  • the front frame can save at least the width of the short segment 212, and can also cover the entire module, thereby saving the side width of the front frame, thereby achieving a narrow bezel design.
  • the appearance of the liquid crystal display is more compact and the display area is relatively larger.
  • the liquid crystal module includes all the schemes of the light guide plate shown in FIG. 2 to FIG. 6 . For details, refer to the foregoing embodiments, which are not described in detail herein.

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

Description

导光板、液晶显示模组及液晶显示器
技术领域
本发明涉及一种导光板、一种液晶显示模组及一种液晶显示器，尤其涉及一种可实现窄边框设计的导光板、液晶显示模组及液晶显示器，属于液晶技术领域。
背景技术
众所周知，在液晶显示领域，LED（Light Emitting Diode，发光二极管）光源是目前的背光源中能将区域亮度控制发挥到最好的光源。而侧光式LED背光模组由于具有成本等优势，是业界普遍看好的液晶技术发展方向。
现有技术中大多数侧光式LED背光模组的架构如图1，其中包括灯条110和导光板200，且灯条110与导光板200平行放置。随着技术的发展，LED的发光效率在不断提高，单颗LED的亮度也一直在提升。这使得侧光式LED背光模组在实际使用时的LED也随着减少，有效降低了成本，但是这样则会出现比较明显的热点（hotspot）现象。为了减轻这样的现象，必须增加LED颗数或者是增加混光距离，但是这样一来，会增加整体模组的边框宽度，机体就不能实现窄边框设计。
发明内容
本发明的主要目的在于提供一种导光板、一种液晶显示模组及一种液晶显示器，旨在有效改善因混光距离加大导致边框加大的问题，实现窄边框设计。
为了实现上述目的，本发明提供一种导光板，所述导光板呈L型，分为长段和短段；所述长段包括出光面及与其相对的内侧面；所述短段其上与所述内侧面相交的一面为入光面；所述LED灯条位于内侧面的下方，设置在所述入光面的一侧，且其光线射出面与所述入光面平行设置，光线从所述入光面入射，通过反射板反射到长段的出光面。
优选地，所述长段和短段粘结。
优选地，所述长段和短段为一体设置。
优选地，所述长段的内侧面上设有反射片。
优选地，所述长段的出光面上设有复数个沟槽，在该沟槽的周边设有网点。
优选地，所述沟槽呈V形、弧形或矩形设置。
优选地，所述导光板的反射面为一斜面。
本发明提供一种液晶显示模组，包括导光板、反射板及LED灯条，其中，所述导光板呈L型，分为长段和短段；所述长段包括出光面及与其相对的内侧面；所述短段上与所述内侧面相交的一面为入光面；所述LED灯条位于内侧面的下方，设置在所述入光面的一侧，且其光线射出面与所述入光面平行设置，光线从所述入光面入射，通过反射板反射到长段的出光面。
优选地，所述反射板呈弧形设置。
本发明提供一种液晶显示器，包括液晶显示模组，该液晶显示模组包括导光板、反射板及LED灯条，其中，所述导光板呈L型，分为长段和短段；所述长段包括出光面及与其相对的内侧面；所述短段上与所述内侧面相交的一面为入光面；所述LED灯条位于内侧面的下方，设置在所述入光面的一侧，且其光线射出面与所述入光面平行设置，光线从所述入光面入射，通过反射板反射到长段的出光面；所述导光板的长段和短段为一体设置或粘接设置。
本发明所提供的导光板、液晶显示模组或液晶显示器，导光板呈分段设置，LED灯条射出的光线从导光板的短段入射，通过反射板反射到长段的出光面，因而可有效改善因混光距离加大导致边框加大的问题，实现窄边框设计，从而节约前框和胶框所使用的原材料，可以使整机外观可以设计更简约。
附图说明
图1为现有技术中导光板和LED灯条的结构示意图；
图2为本发明液晶显示模组一较佳实施例的结构示意图；
图3为本发明导光板一较佳实施例的结构示意图；
图4为本发明导光板一较佳实施例的连接结构示意图；
图5为本发明反射板一较佳实施例的结构示意图；
图6为本发明反射板一较佳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
本发明的总体思路是将导光板折角设置，将LED灯条设置在长段的下方，从而节省机体的内部空间，实现窄边框设计。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。
本发明提供一种液晶显示模组，参照图2，该液晶显示模组包括导光板210、反射板310及LED灯条110，其中，所述导光板210呈L型，分为长段211和短段212；所述长段211包括出光面2111及与其相对的内侧面2112；所述短段212上与所述内侧面2112相交的一面为入光面2121；所述LED灯条110位于内侧面2112的下方，设置在所述入光面2121的一侧，且其光线射出面与所述入光面2121平行设置，光线从所述入光面2121入射，通过反射板310反射到长段211的出光面。
本发明液晶模组可应用到液晶显示器中，液晶显示器除了上述导光板210、反射板310及LED灯条110外，还包括前框、后框（图中未示出）等，其中前框框接在液晶模组的周边，相对用户，导光板210设置在前框的里面。由于导光板210呈L型设置，前框可节省至少短段212的宽度，也可包覆整个模组，因而可以节省前框的边宽，从而实现窄边框设计，使得液晶显示器的整机外观更为简洁，显示区域相对更大。
导光板210的长段211与短段212的连接方式有多种，可灵活进行选择。在一实施例中，长段211与短段212呈一体式设置，例如可通过模具成型等方式，获得呈一体式设置的导光板210。参照图3，在一实施例中，导光板210的长段211和短段212为分体式设置，通过ＵＶ胶或者现有可行的连接方式连接到一起，例如扣接、插接等。在一具体示例中，可在短段212和长段211上设置扣接结构，例如在长段211或短段212上设置扣榫，在另一段上设置与扣榫适配的扣槽，扣榫与扣槽配合，从而将长段211与短段212连接。在另一具体示例中，还可设置一材质与导光板210相同的插件，两端均设置插钩，分别插入长段211和短段212中，从而将两者连接到一起。
参照图4，为分体式长段211和短段212的另外一种连接形式。本实施例与前述实施例不同的是：短段212上，入光面2121的上部与长段211相连， 两者通过UV胶400或者现有可行的连接部件连接。
在一实施例中，还可在内侧面2112上、LED灯条110的的上方粘贴反射片，以防止光线直接穿透长段211，造成局部漏光现象。
此外，为了导光均匀，还可在出光面2111上设置沟槽，并在该沟槽上设置多个网点，从而使点光源的光线经由沟槽以及网点散射出去。在一实施例中，该沟槽可以呈V形、弧形或矩形设置。
上述实施例中，反射板310及导光板210反射面的形状可以有多种选择，参照图5，在一实施例中，导光板210的反射面为一斜面。参照图6，在另一实施例中，反射板310为呈圆弧形设置。
如本领域技术人员所周知，液晶显示模组中还包括背板，其可形成一背框，位于反射板310的外部。本发明实施例中，LED灯条110也可直接与背板接触，以提供散热通道，降低热对部品性能的影响。
本发明还提供一种液晶显示器，该液晶显示器具有上述液晶显示模组。该液晶显示模组设有前述导光板210、反射板310及LED灯条110。本发明液晶显示器实施例中，由于导光板210呈L型设置，前框可节省至少短段212的宽度，也可包覆整个模组，因而可以节省前框的边宽，从而实现窄边框设计，使得液晶显示器的整机外观更为简洁，显示区域相对更大。本发明液晶显示器的实施例中，液晶模组包括了图2至6所示导光板的所有方案，具体可参照前述实施例，在此不作详述。
以上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等效流程变换，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 (20)

  1. 一种导光板，其特征在于，所述导光板呈L型，分为长段和短段；所述长段包括出光面及与其相对的内侧面；所述短段上与所述内侧面相交的一面为入光面；所述LED灯条位于内侧面的下方，设置在所述入光面的一侧，且其光线射出面与所述入光面平行设置，光线从所述入光面入射，通过反射板反射到长段的出光面。
  2. 如权利要求1所述的导光板，其特征在于，所述长段和短段粘结。
  3. 如权利要求1所述的导光板，其特征在于，所述长段和短段为一体设置。
  4. 如权利要求3所述的导光板，其特征在于，所述长段的内侧面上设有反射片。
  5. 如权利要求4所述的导光板，其特征在于，所述长段的出光面上设有复数个沟槽，在该沟槽的周边设有网点。
  6. 如权利要求5所述的导光板，其特征在于，所述沟槽呈V形、弧形或矩形设置。
  7. 如权利要求6所述的导光板，其特征在于，所述导光板的反射面为一斜面。
  8. 一种液晶显示模组，包括导光板、反射板及LED灯条，其特征在于，所述导光板呈L型，分为长段和短段；所述长段包括出光面及与其相对的内侧面；所述短段上与所述内侧面相交的一面为入光面；所述LED灯条位于内侧面的下方，设置在所述入光面的一侧，且其光线射出面与所述入光面平行设置，光线从所述入光面入射，通过反射板反射到长段的出光面。
  9. 如权利要求8所述的液晶显示模组，其特征在于，所述反射板呈弧形设置。
  10. 如权利要求9所述的液晶显示模组，其特征在于，所述导光板的长段和短段粘结。
  11. 如权利要求8所述的液晶显示模组，其特征在于，所述导光板的长段和短段为一体设置。
  12. 如权利要求11所述的液晶显示模组，其特征在于，所述导光板的长段的内侧面上设有反射片。
  13. 如权利要求12所述的液晶显示模组，其特征在于，所述长段的出光面上设有复数个沟槽，在该沟槽的周边设有网点。
  14. 如权利要求13所述的液晶显示模组，其特征在于，所述沟槽呈V形、弧形或矩形设置。
  15. 如权利要求14所述的液晶显示模组，其特征在于，所述导光板的反射面为一斜面。
  16. 一种液晶显示器，包括液晶显示模组，所述液晶模组包括导光板、反射板及LED灯条，其特征在于，所述导光板呈L型，分为长段和短段；所述长段包括出光面及与其相对的内侧面；所述短段上与所述内侧面相交的一面为入光面；所述LED灯条位于内侧面的下方，设置在所述入光面的一侧，且其光线射出面与所述入光面平行设置，光线从所述入光面入射，通过反射板反射到长段的出光面；所述导光板的长段和短段为一体设置或粘接设置。
  17. 如权利要求16所述的液晶显示器，其特征在于，所述导光板的长段的内侧面上设有反射片。
  18. 如权利要求17所述的液晶显示器，其特征在于，所述长段的出光面上设有复数个沟槽，在该沟槽的周边设有网点。
  19. 如权利要求18所述的液晶显示器，其特征在于，所述沟槽呈V形、弧形或矩形设置。
  20. 如权利要求19所述的液晶显示器，其特征在于，所述导光板的反射面为一斜面。
PCT/CN2011/076877 2011-04-02 2011-07-05 导光板、液晶显示模组及液晶显示器 Ceased WO2012136025A1 (zh)

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CN105987356B (zh) * 2015-01-28 2019-04-23 中强光电股份有限公司 光源模块和l形导光板
CN105116618B (zh) * 2015-10-14 2018-01-23 京东方科技集团股份有限公司 背光模组和显示装置
CN107479487A (zh) * 2017-09-16 2017-12-15 南京中高知识产权股份有限公司 无框工控机以及自动化生产线
CN108897090A (zh) * 2018-05-25 2018-11-27 深圳创维－Rgb电子有限公司 一种导光板、液晶模组和显示设备
CN108594537A (zh) * 2018-07-03 2018-09-28 深圳创维－Rgb电子有限公司 一种背光源及显示装置
CN109683398A (zh) * 2019-02-22 2019-04-26 惠州市华星光电技术有限公司 背光模组及显示装置
CN114200715A (zh) * 2021-12-13 2022-03-18 武汉华星光电技术有限公司 背光模组及显示面板
US11982829B2 (en) 2021-12-13 2024-05-14 Wuhan China Star Optoelectronics Technology Co., Ltd. Backlight module and display panel
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