WO2019237564A1 - 背光模组及液晶显示装置 - Google Patents

背光模组及液晶显示装置 Download PDF

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Publication number
WO2019237564A1
WO2019237564A1 PCT/CN2018/107830 CN2018107830W WO2019237564A1 WO 2019237564 A1 WO2019237564 A1 WO 2019237564A1 CN 2018107830 W CN2018107830 W CN 2018107830W WO 2019237564 A1 WO2019237564 A1 WO 2019237564A1
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WIPO (PCT)
Prior art keywords
light
backlight module
light source
incident
reflecting
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PCT/CN2018/107830
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English (en)
French (fr)
Inventor
景小红
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惠州市华星光电技术有限公司
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Application filed by 惠州市华星光电技术有限公司 filed Critical 惠州市华星光电技术有限公司
Priority to US16/300,047 priority Critical patent/US10663799B2/en
Publication of WO2019237564A1 publication Critical patent/WO2019237564A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present invention relates to the field of display technology, and in particular, to a backlight module and a liquid crystal display device.
  • liquid crystal displays Liquid Crystal Display, LCD
  • LCD liquid crystal Display
  • other flat display devices have been widely used in mobile phones, TVs, personal computers due to their advantages such as high picture quality, power saving, thin body and wide application range.
  • Various consumer electronics products such as digital assistants, digital cameras, notebook computers, and desktop computers, have become mainstream in display devices.
  • liquid crystal display devices which include a liquid crystal display panel and a backlight module.
  • the working principle of a liquid crystal display panel is to place liquid crystal molecules in two parallel glass substrates. There are many small vertical and horizontal wires in the middle of the two glass substrates. The liquid crystal molecules are controlled to change direction by turning on or off, and the light of the backlight module is changed. Refracted to produce a picture.
  • the backlight module Since the liquid crystal display panel itself does not emit light, an image is normally displayed by a light source provided by the backlight module. Therefore, the backlight module has become one of the key components of the liquid crystal display device.
  • the backlight module is divided into a side-type backlight module and a direct-type backlight module according to the incident position of the light source.
  • the direct type backlight module is a light source such as a cathode fluorescent lamp (CCFL) or a light emitting diode (CCFL) light source arranged behind a liquid crystal display panel. The light is uniformized by a diffuser to form a surface light source. Provided to the LCD panel.
  • the backlight module of liquid crystal display devices has gradually increased the demand for simplified processes and thin products.
  • the current direct-type backlight module is assembled from multiple light-emitting strips.
  • the process of wiring and cable management is very complicated, and cannot meet the requirements of the backlight module for simplifying the process.
  • the side-type backlight module requires a light guide plate for light guidance, which causes the overall module weight to increase, which cannot meet the lightness and thinness of the backlight module product.
  • the purpose of the present invention is to provide a backlight module, which ensures the brightness uniformity of the backlight module when a single LED is used as the light source.
  • the object of the present invention is also to provide a liquid crystal display device having a backlight module which uses a single LED as a light source and has uniform brightness, which can improve the display quality of the liquid crystal display device, reduce the production cost of the liquid crystal display device, and increase the competitiveness of the product.
  • the present invention provides a backlight module, which includes a cavity, a reflection cover, a light source, and an auxiliary light guide diffusion structure;
  • the cavity includes: a reflective surface, a mounting surface connected to the reflective surface, and a light emitting surface connecting the reflective surface and the mounting surface;
  • the light source is a light emitting diode
  • the reflection cover is installed on the mounting surface, and the light source is provided in the reflection cover;
  • the reflecting surface has a converging area and a non-converging area located outside the converging area.
  • the light emitted by the light source is directly incident on the reflecting surface or reflected by the reflecting cover and incident on the reflecting surface, and is incident on the reflecting surface.
  • the light density in the focusing area is greater than the light density incident into the non-focusing area;
  • the auxiliary light-guiding diffusion structure is disposed on the reflecting surface and is located in the gathering area, and at least a part of the light incident into the gathering area is diffused by the auxiliary light-guiding diffusion structure toward the light-receiving area.
  • the focusing area emerges in a direction away from the light source.
  • the reflecting surface includes a bottom surface and three side surfaces, the bottom surface and the light emitting surface are relatively spaced apart, the three side surfaces and the mounting surface surround the bottom surface and are connected to the bottom surface. The surface is connected to the three side surfaces and the mounting surface.
  • Each of the side surfaces is an arc surface that is raised from the bottom surface toward one side of the light emitting surface.
  • the gathering area is located on the bottom surface.
  • the auxiliary light-guiding diffusion structure includes: a light incident surface, a diffusion surface connected to the light incident surface, two oppositely arranged connection sides connecting the light incident surface and the diffusion surface, and a light incident surface, a diffusion surface, and two connecting sides.
  • a connection bottom surface, the light incident surface, the diffusion surface, the two connection side surfaces, and the connection bottom surface together form a solid body structure;
  • the connecting bottom surface is laminated with the bottom surface, the light incident surface intersects the bottom surface to form an acute angle, the acute angle opening faces the light source, the diffusion surface intersects with the bottom surface and the intersection line is located away from the One side of the light source.
  • the light incident surface is a flat surface
  • the diffusion surface is an arc surface
  • the reflecting surface is a specular reflecting surface or a white reflecting surface.
  • the reflecting cover is C-shaped, and the opening of the reflecting cover faces the reflecting surface.
  • the material of the auxiliary light-guiding diffusion structure is an acrylic material.
  • the present invention also provides a liquid crystal display device including the above-mentioned backlight module.
  • the present invention provides a backlight module.
  • the backlight module includes: a cavity, a reflection cover, a light source, and an auxiliary light guide diffusion structure; the cavity includes: a reflective surface, a mounting surface connected to the reflective surface, and light output connecting the reflective surface and the mounting surface
  • the light source is an LED
  • the reflection cover is mounted on the mounting surface
  • the light source is provided in the reflection cover
  • the auxiliary light guide diffusion structure is provided on the reflection surface
  • the auxiliary light guide diffusion structure can help the light incident on the reflecting surface to diffuse uniformly, thereby improving the uniformity of light emission of the backlight module and improving display quality.
  • the object of the present invention is also to provide a liquid crystal display device having a backlight module which uses a single LED as a light source and has uniform brightness, which can improve the display quality of the liquid crystal display device, reduce the production cost of the liquid crystal display device, and increase the competitiveness of the product.
  • FIG. 1 is a schematic structural diagram of a backlight module of the present invention
  • FIG. 2 is a schematic diagram of a light path of a backlight module of the present invention.
  • FIG. 3 is a schematic diagram of an auxiliary light guide diffusion structure of a backlight module of the present invention.
  • a backlight module of the present invention includes: a cavity 10, a reflection cover 20, a light source 30, and an auxiliary light guide diffusion structure 40;
  • the cavity 10 includes a reflective surface 11, a mounting surface 12 connected to the reflective surface 11, and a light emitting surface 13 connecting the reflective surface 11 and the mounting surface 12.
  • the light source 30 is a light emitting diode.
  • the reflection cover 20 is mounted on the mounting surface 12, and the light source 30 is disposed in the reflection cover 20;
  • the light source 30 and the light source 30 emit light directly incident on the reflective surface 111 or reflected by the reflective cover 20.
  • the reflective surface 111 When it is incident on the reflective surface 111 afterwards, it will gather in a part of the reflective surface 111 (generally located near the light source 13), so that the light density in some areas of the reflective surface 111 is greater than the light in other areas Density, so that the light emitted from the light emitting surface 13 after being reflected by the reflecting surface 111 will also be concentrated in some areas, resulting in uneven light emission of the backlight module.
  • the area where the light gathering occurs on the reflecting surface 111 is defined as the concentration Area
  • the area other than the aggregation area is a non-aggregation area, that is, the light density incident into the aggregation area is greater than the light density incident into the non-aggregation area.
  • the specific position of the gathering area may vary according to the shape of the cavity 10, the shape of the reflector 20, and the installation position of the light source 30.
  • the auxiliary light-guiding diffusion structure 40 is disposed on the reflective surface 11 and is located in the gathering area. At least part of the light incident into the gathering area is diffused by the auxiliary light-guiding diffusion structure 40. , Emit in a direction away from the light source 30 relative to the focusing area.
  • the present invention provides the auxiliary light guide diffusion structure 40 so that the light emitted from a part of the light emitting surface (for example, the first area near the light source 13) is originally collected after reflecting through the focusing area, and the emitted light is collected. Part of the light is diffused from the auxiliary light guide diffusion structure 40 and exits from a region other than a part of the light emitting surface (for example, a second region far from the light source 13), so that the light of the backlight module is evenly diffused. .
  • the reflecting cover 20 is C-shaped, and the opening of the reflecting cover 20 faces the reflecting surface 11, and the reflecting cover 20 is used for transmitting light emitted by the light source 30. Reflected on the light emitting surface 13, the reflecting surface 11 or the auxiliary light guide diffusion structure 40.
  • the reflecting surface 11 is configured to reflect light onto the light emitting surface 13 or the auxiliary light guide diffusion structure 40.
  • the reflective surface 11, the mounting surface 12 and the light emitting surface 13 are connected to each other to form a closed cavity 10.
  • the reflective surface 11 includes a bottom surface 111 and three side surfaces 112. The bottom surface 111 and the light emitting surface 13 are spaced from each other.
  • the three side surfaces 112 and the mounting surface 12 surround the bottom surface 111 and are connected to the bottom surface 111.
  • the reflection function may be a specular reflection function or a white reflection function, that is, the reflection surface 11 is a specular reflection surface or a white reflection surface.
  • the bottom surface 111 is rectangular, and the three side surfaces 112 and the mounting surface 12 are connected to one side of the bottom surface 111, respectively.
  • the three side surfaces 112 are all curved surfaces that are raised relative to the bottom surface 111 toward a side closer to the light emitting surface 13.
  • the aggregation region is located on the bottom surface 111, so that the auxiliary light guide diffusion structure 40 is disposed on the bottom surface 111.
  • the auxiliary light guide diffusion structure 40 includes: the auxiliary light guide diffusion structure 40 includes: a light incident surface 41, a diffusion surface 42 connected to the light incident surface 41, and a connection between the light incident surface 41 and the diffusion surface 42. Two light-receiving surfaces 41, diffusion surfaces 42, two connecting side surfaces 43, and connecting bottom surface 44 are jointly enclosed by two oppositely-connected connecting side surfaces 43 and light incident surface 41, diffusion surface 42, and two connecting side surfaces 44.
  • the connecting bottom surface 44 is laminated with the bottom surface 111, the light incident surface 41 and the bottom surface 111 intersect to form an acute angle, the acute angle opening faces the light source 30, and the diffusion surface 42 intersects the bottom surface 111
  • the intersection line is located on a side far from the light source 30.
  • the auxiliary light-guiding diffusion structure 40 may be an acrylic material or other transparent plastic.
  • the light incident surface 41 is a flat surface
  • the diffusion surface 42 is an arc surface
  • the auxiliary light guide diffusion structure 40 has two propagation modes when diffusing light, and the first propagation mode is total reflection propagation, as shown in FIG. 2.
  • the light ray A (dotted line) in the figure shows that the light ray A is incident from the light incident surface 41 into the auxiliary light guide diffusion structure 40, and is then reflected by the diffusion surface 42 back to the bottom surface 111, and then reflected back through the bottom surface 111.
  • the diffusion surface 42 is refracted from the light exit surface 13 away from the light source 30 after being refracted by the diffusion surface 42.
  • the second propagation mode is refractive propagation, as shown by two rays B (solid lines) shown in FIG. 2.
  • the light ray B enters the auxiliary light-guiding diffusion structure 40 from the light incident surface 41 and is refracted by the diffusion surface 42 and exits from a region away from the light source 30 to the light emitting surface 13 to achieve
  • the light emitted from the area of the light emitting surface 13 close to the light source 30 is diffused to the area of the light emitting surface 13 away from the light source 30 to improve the uniformity of light emission of the backlight module, avoiding light gathering and causing bright Darkness unevenness, where only one LED is needed Status of the source to achieve uniform distribution of the outgoing light, a backlight good effect.
  • the present invention also provides a liquid crystal display device including the above-mentioned backlight module.
  • the present invention provides a backlight module.
  • the backlight module includes: a cavity, a reflection cover, a light source, and an auxiliary light guide diffusion structure; the cavity includes: a reflective surface, a mounting surface connected to the reflective surface, and light output connecting the reflective surface and the mounting surface
  • the light source is an LED
  • the reflection cover is mounted on the mounting surface
  • the light source is provided in the reflection cover
  • the auxiliary light guide diffusion structure is provided on the reflection surface
  • the auxiliary light guide diffusion structure can help the light incident on the reflecting surface to diffuse uniformly, thereby improving the uniformity of light emission of the backlight module and improving display quality.
  • the object of the present invention is also to provide a liquid crystal display device having a backlight module which uses a single LED as a light source and has uniform brightness, which can improve the display quality of the liquid crystal display device, reduce the production cost of the liquid crystal display device, and enhance the competitiveness of the product.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光模组，包括：腔体（10）、反射罩（20）、光源（30）及辅助导光扩散结构（40）；腔体（10）包括：反射面（11）、与反射面（11）相连的安装面（12）以及连接反射面（11）和安装面（12）的出光面（13）；光源（30）为一颗LED，反射罩（20）安装于安装面上（12），光源（30）设于反射罩（20）内，辅助导光扩散结构（40）设于反射面（11）上，辅助导光扩散结构（40）能够辅助入射至反射面（11）上的光线均匀扩散，从而提升背光模组的光线出射的均匀性，提升显示品质。一种液晶显示装置，具有采用单颗LED作为光源（30）且亮度均匀的背光模组，能够提升液晶显示装置的显示品质，降低液晶显示装置的生产成本，提升产品竞争力。

Description

背光模组及液晶显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种背光模组及液晶显示装置。
背景技术
随着显示技术的发展，液晶显示器(Liquid Crystal Display，LCD)等平面显示装置因具有高画质、省电、机身薄及应用范围广等优点，而被广泛的应用于手机、电视、个人数字助理、数字相机、笔记本电脑、台式计算机等各种消费性电子产品，成为显示装置中的主流。
现有市场上的液晶显示装置大部分为背光型液晶显示装置，其包括液晶显示面板及背光模组(backlight module)。液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，两片玻璃基板中间有许多垂直和水平的细小电线，通过通电与否来控制液晶分子改变方向，将背光模组的光线折射出来产生画面。
由于液晶显示面板本身不发光，需要借由背光模组提供的光源来正常显示影像，因此，背光模组成为液晶显示装置的关键组件之一。背光模组依照光源入射位置的不同分成侧入式背光模组与直下式背光模组两种。直下式背光模组是将光源例如阴极萤光灯管(Cold Cathode Fluorescent Lamp，CCFL)或发光二极管(Light Emitting Diode，LED)光源设置在液晶显示面板后方，光线经扩散板均匀化后形成面光源提供给液晶显示面板。
随着大尺寸液晶显示装置的普及，液晶显示装置的背光模组对工艺简化化和产品轻薄化的需求逐步提升，但是目前直下式背光模组为多条发光条组装而成，其组装、插线及理线的工艺十分复杂，无法满足背光模组对工艺简化的要求，而侧入式背光模组则因需要导光板进行导光，造成整体模组重量提升，无法满足背光模组产品轻薄化的要求，为了简化模组的组装工艺，同时实现背光模组产品的轻薄化，单颗发光二极管背光模组(ONE LED Package BLU)应运而生，但目前的单颗发光二极管背光模组的背光均匀性不佳，尤其在混光距离较小的情况下，出光面上的光线会在靠近所述发光二极管的位置聚集，造成靠近所述发光二极管的位置和远离所述发光二极管的位置出现亮暗不均，即近光源的处的亮度大于远光源的处的亮度。
发明内容
本发明的目的在于提供一种背光模组，在采用单颗LED作为光源的情况下，保证背光模组的亮度均匀性。
本发明的目的还在于提供一种液晶显示装置，具有采用单颗LED作为光源且亮度均匀的背光模组，能够提升液晶显示装置的显示品质，降低液晶显示装置的生产成本，提升产品竞争力。
为实现上述目的，本发明提供一种背光模组，包括：腔体、反射罩、光源及辅助导光扩散结构；
所述腔体包括：反射面、与所述反射面相连的安装面以及连接所述反射面和安装面的出光面；
所述光源为一颗发光二极管，所述反射罩安装于所述安装面上，所述光源设于所述反射罩内；
所述反射面具有聚集区及位于聚集区以外的非聚集区，所述光源发出光线直接入射至所述反射面上或经由所述反射罩反射后入射至所述反射面上，且入射至所述聚集区中的光线密度大于入射至所述非聚集区中的光线密度；
所述辅助导光扩散结构设于所述反射面上且位于所述聚集区内，至少部分入射至所述聚集区中的光线经过所述辅助导光扩散结构的扩散后，向相对于所述聚集区远离所述光源的方向出射。
所述反射面包括：一底面和三个侧面，所述底面与所述出光面相对间隔设置，所述三个侧面及安装面环绕于所述底面的四周并与所述底面相连，所述出光面与所述三个侧面及安装面相连。
所述侧面均为相对于所述底面往所述出光面的一侧翘起的弧面。
所述聚集区位于所述底面上。
所述辅助导光扩散结构包括：入光面、与入光面相连的扩散面、连接所述入光面与扩散面的两相对设置的连接侧面、以及入光面、扩散面、两连接侧面的连接底面，所述入光面、扩散面、两连接侧面以及连接底面共同围成一个实心体结构；
所述连接底面与所述底面层叠，所述入光面与所述底面相交形成一锐角，所述锐角的开口朝向所述光源，所述扩散面与所述底面相交且相交线位于远离所述光源的一侧。
所述入光面为平面，所述扩散面为弧面。
所述反射面为镜面反射面或白色反射面。
所述反射罩呈C形，所述反射罩的开口朝向所述反射面。
辅助导光扩散结构的材料为亚克力材料。
本发明还提供一种液晶显示装置，包括上述的背光模组。
本发明的有益效果：本发明提供一种背光模组。所述背光模组包括：腔体、反射罩、光源及辅助导光扩散结构；所述腔体包括：反射面、与所述反射面相连的安装面以及连接所述反射面和安装面的出光面；所述光源为一颗LED，所述反射罩安装于所述安装面上，所述光源设于所述反射罩内，所述辅助导光扩散结构设于所述反射面上，所述辅助导光扩散结构能够辅助所述入射至反射面上的光线均匀扩散，从而提升背光模组的光线出射的均匀性，提升显示品质。本发明的目的还在于提供一种液晶显示装置，具有采用单颗LED作为光源且亮度均匀的背光模组，能够提升液晶显示装置的显示品质，降低液晶显示装置的生产成本，提升产品竞争力。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为本发明的背光模组的结构示意图；
图2为本发明的背光模组的光路示意图；
图3为本发明的背光模组的辅助导光扩散结构的示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1，本发明的一种背光模组，包括：腔体10、反射罩20、光源30及辅助导光扩散结构40；
所述腔体10包括：反射面11、与所述反射面11相连的安装面12以及连接所述反射面11和安装面12的出光面13；所述光源30为一颗发光二极管，所述反射罩20安装于所述安装面12上，所述光源30设于所述反射罩20内；
具体地，由于采用单颗LED作为光源13且受到腔体10的混光距离的限制，所述光源13所述光源30发出光线直接入射至所述反射面111上或 经由所述反射罩20反射后入射至所述反射面111上时，会在所述反射面111的部分区域出现聚集(一般位于靠近光源13的位置)，使得所述反射面111的部分区域中光线密度大于其他区域的光线密度，从而经过反射面111反射后从出光面13出射的光线也会在部分区域聚集，导致背光模组的出光不均，在本发明中定义所述反射面111上出现光线聚集的区域为聚集区，除聚集区以外的区域为非聚集区，也即所述入射至所述聚集区中的光线密度大于入射至所述非聚集区中的光线密度。
进一步地，所述聚集区的具体位置根据腔体10的形状、反射罩20的形状以及光源30的安装位置不同会存在变化。
具体地，所述辅助导光扩散结构40设于所述反射面11上且位于所述聚集区内，至少部分入射至所述聚集区中的光线经过所述辅助导光扩散结构40的扩散后，向相对于所述聚集区远离所述光源30的方向出射。
相比于未设置辅助导光扩散结构40，本发明通过设置辅助导光扩散结构40使得原本经过所述聚集区反射后在出光面的部分区域(例如靠近光源13的第一区域)聚集出射光线中的一部分经过所述辅助导光扩散结构40的扩散至后从该出光面的部分区域以外的其他区域(例如远离光源13的第二区域)出射，从而使得所述背光模组的光线均匀扩散。
具体地，在本发明的优选实施例中，所述反射罩20呈C形，所述反射罩20的开口朝向所述反射面11，所述反射罩20用于将所述光源30发出的光线反射至出光面13、反射面11或辅助导光扩散结构40上。
具体地，所述反射面11用于反射光线至出光面13或辅助导光扩散结构40上。在本发明的优选实施例中，所述反射面11、安装面12及出光面13相互连接共同形成一封闭的腔体10，所述反射面11包括：一底面111和三个侧面112，所述底面111与所述出光面13相对间隔设置，所述三个侧面112及安装面12环绕于所述底面111的四周并与所述底面111相连，所述出光面13与所述三个侧面112及安装面12相连，从而通过所述底面111、侧面112、安装面12及出光面13共同形成一封闭的腔体10，其中所述反射面11位于所述腔体10的内部的一侧具有反射功能，所述反射功能可以为镜面反射功能或白色反射功能，也即所述反射面11为镜面反射面或白色反射面。
进一步地，如图1所示及图2所示，在本发明的优选实施例中，所述底面111为矩形，所述三个侧面112及安装面12分别与所述底面111的一边相连，所述三个侧面112均为相对于所述底面111往靠近所述出光面13的一侧翘起的弧面。
具体地，在本发明的优选实施例中，所述聚集区位于所述底面111上，从而所述辅助导光扩散结构40设于所述底面111上。
进一步地，所述辅助导光扩散结构40包括：所述辅助导光扩散结构40包括：入光面41、与入光面41相连的扩散面42、连接所述入光面41与扩散面42的两相对设置的连接侧面43、以及入光面41、扩散面42、两连接侧面43的连接底面44，所述入光面41、扩散面42、两连接侧面43以及连接底面44共同围成一个实心体结构；
所述连接底面44与所述底面111层叠，所述入光面41与所述底面111相交形成一锐角，所述锐角的开口朝向所述光源30，所述扩散面42与所述底面111相交且相交线位于远离所述光源30的一侧。
优选地，所述辅助导光扩散结构40可以为亚克力材料或其他透明塑料。
进一步地，所述入光面41为平面，所述扩散面42为弧面。
具体地，在本发明的优选实施例中，如图2所示，所述辅助导光扩散结构40在扩散光线时，具有两种传播方式，第一种传播方式为全反射传播，如图2中的光线A(虚线)所示，光线A从所述入光面41入射到所述辅助导光扩散结构40内，随后被所述扩散面42反射回底面111上，再经过底面111反射回扩散面42，经所述扩散面42折射后从所述出光面13远离所述光源30的区域出射；第二传播方式为折射传播，如图2所示的两条光线B(实线)所示，所述光线B从所述入光面41入射到所述辅助导光扩散结构40，经所述扩散面42折射后从至所述出光面13远离所述光源30的区域出射，从而实现将聚集在所述出光面13靠近所述光源30的区域出射的光线扩散至所述出光面13远离所述光源30的区域出射，提升背光模组的光线出射均匀性，避免光线聚集，造成亮暗不均，在仅需要一颗发光二极管作为光源的情况，实现均匀分布的出射光线，背光效果好。
基于上述的背光模组，本发明还提供一种液晶显示装置，包括上述的背光模组。
综上所述，本发明提供一种背光模组。所述背光模组包括：腔体、反射罩、光源及辅助导光扩散结构；所述腔体包括：反射面、与所述反射面相连的安装面以及连接所述反射面和安装面的出光面；所述光源为一颗LED，所述反射罩安装于所述安装面上，所述光源设于所述反射罩内，所述辅助导光扩散结构设于所述反射面上，所述辅助导光扩散结构能够辅助所述入射至反射面上的光线均匀扩散，从而提升背光模组的光线出射的均匀性，提升显示品质。本发明的目的还在于提供一种液晶显示装置，具有采用单颗LED作为光源且亮度均匀的背光模组，能够提升液晶显示装置的 显示品质，降低液晶显示装置的生产成本，提升产品竞争力。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (10)

  1. 一种背光模组，包括：腔体、反射罩、光源及辅助导光扩散结构；
    所述腔体包括：反射面、与所述反射面相连的安装面以及连接所述反射面和安装面的出光面；
    所述光源为一颗发光二极管，所述反射罩安装于所述安装面上，所述光源设于所述反射罩内；
    所述反射面具有聚集区及位于聚集区以外的非聚集区，所述光源发出光线直接入射至所述反射面上或经由所述反射罩反射后入射至所述反射面上，且入射至所述聚集区中的光线密度大于入射至所述非聚集区中的光线密度；
    所述辅助导光扩散结构设于所述反射面上且位于所述聚集区内，至少部分入射至所述聚集区中的光线经过所述辅助导光扩散结构的扩散后，向相对于所述聚集区远离所述光源的方向出射。
  2. 如权利要求1所述的背光模组，其中，所述反射面包括：一底面和三个侧面，所述底面与所述出光面相对间隔设置，所述三个侧面及安装面环绕于所述底面的四周并与所述底面相连，所述出光面与所述三个侧面及安装面相连。
  3. 如权利要求2所述的背光模组，其中，所述侧面均为相对于所述底面往所述出光面的一侧翘起的弧面。
  4. 如权利要求2所述的背光模组，其中，所述聚集区位于所述底面上。
  5. 如权利要求2所述的背光模组，其中，所述辅助导光扩散结构包括：入光面、与入光面相连的扩散面、连接所述入光面与扩散面的两相对设置的连接侧面、以及入光面、扩散面、两连接侧面的连接底面，所述入光面、扩散面、两连接侧面以及连接底面共同围成一个实心体结构；
    所述连接底面与所述底面层叠，所述入光面与所述底面相交形成一锐角，所述锐角的开口朝向所述光源，所述扩散面与所述底面相交且相交线位于远离所述光源的一侧。
  6. 如权利要求5所述的背光模组，其中，所述入光面为平面，所述扩散面为弧面。
  7. 如权利要求1所述的背光模组，其中，所述反射面为镜面反射面或白色反射面。
  8. 如权利要求1所述的背光模组，其中，所述反射罩呈C形，所述反 射罩的开口朝向所述反射面。
  9. 如权利要求1所述的背光模组，其中，辅助导光扩散结构的材料为亚克力材料。
  10. 一种液晶显示装置，包括如权利要求1所述的背光模组。
PCT/CN2018/107830 2018-06-15 2018-09-27 背光模组及液晶显示装置 WO2019237564A1 (zh)

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