WO2016187899A1 - 直下式led背光模组以及液晶显示装置 - Google Patents

直下式led背光模组以及液晶显示装置 Download PDF

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Publication number
WO2016187899A1
WO2016187899A1 PCT/CN2015/081011 CN2015081011W WO2016187899A1 WO 2016187899 A1 WO2016187899 A1 WO 2016187899A1 CN 2015081011 W CN2015081011 W CN 2015081011W WO 2016187899 A1 WO2016187899 A1 WO 2016187899A1
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backlight module
liquid crystal
optical
optical lenses
led
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PCT/CN2015/081011
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English (en)
French (fr)
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张彦学
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武汉华星光电技术有限公司
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Publication of WO2016187899A1 publication Critical patent/WO2016187899A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • G02B6/0021—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 for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the invention relates to the technical field of liquid crystal displays, in particular to a direct type LED backlight module and a liquid crystal display device.
  • liquid crystal displays have high space utilization efficiency and low power consumption. Many advantages such as no radiation and low electromagnetic interference have become the mainstream of the market.
  • the liquid crystal display usually includes a liquid crystal display panel and a backlight module (Black Light Module, BL for short).
  • the liquid crystal display is a passive display device that does not have a self-illuminating function
  • a backlight module needs to be added to provide a display light source required for the display panel.
  • the surface light source generated by the backlight module has sufficient and uniform brightness directly affects The display quality of the liquid crystal display.
  • the LED has the characteristics of high luminous efficiency, long life and low power consumption, and is the first choice for the application of the backlight module.
  • the backlight module can be classified into an edge light type and a direct light type according to its structure. Two.
  • the direct type backlight module arranges a plurality of LED light sources through a matrix or arranges a plurality of LED light tubes in parallel on a back plate, and then reflects the light source upwards by the reflection plate on the back plate, and then uniformly disperses through the diffusion plate, with a view to The illuminating surface obtains a flat uniform light-emitting effect. Therefore, the direct type backlight module has a high luminance, a good light viewing angle, and a high light utilization efficiency, and is suitable for use in a large-sized display, but requires a larger number of colors, because the light source is placed directly under the light-emitting surface.
  • a light guide plate or an optical lens is usually disposed in front of the light emitting surface of the light source.
  • the existing light guide plates or optical lenses are a one-piece structure with a large area, and the size thereof is generally only suitable for a product of one specification, and the interchangeability and the commonality (products in multiple specifications) Poor between, directly affects the product development cycle, increasing the cost of opening and mass production.
  • the present invention provides a direct-lit LED backlight module in which the light guiding medium has high interchangeability and versatility, which can effectively shorten the product development cycle and reduce the opening and mass production. cost.
  • a direct-lit LED backlight module includes a backplane and a plurality of LED chips arranged on the backplane, wherein each LED chip is correspondingly covered with an optical lens; the optical lens has a top surface and a bottom surface. The bottom surface defines a lens to form a lens structure, and the LED chip is received in the recess; wherein the plurality of optical lenses disposed on the plurality of LED chips together form a light guide plate structure, and the plurality of optical lenses The top surface is located on the same horizontal surface to form a light surface.
  • the plurality of LED chips are arrayed on a printed circuit board.
  • the plurality of optical lenses are connected to the printed circuit board by means of pasting, and the plurality of optical lenses are integrally integrated by means of pasting.
  • the plurality of optical lenses are connected to the printed circuit board by injection molding, and the plurality of optical lenses are directly integrated into one another during injection molding.
  • the groove has a truncated cone shape.
  • the optical lens has a square structure.
  • the backlight module further includes an optical film set, and the optical film set is disposed on the light emitting surface.
  • the present invention also provides a liquid crystal display device including a liquid crystal panel and a backlight module, the liquid crystal panel is disposed opposite to the backlight module, and the backlight module provides a display light source to the liquid crystal panel to The liquid crystal panel displays an image, wherein the backlight module is the foregoing backlight module.
  • an optical lens is disposed on each LED chip, and the plurality of optical optical lenses can be combined to form a light guide plate. structure. Further, the plurality of optical lenses are separated structures, and the light guide plate structures of different sizes can be obtained according to actual needs (mainly according to the number of LED chips), and are suitable for various products with different specifications, and have high interchangeability. And versatility, can effectively shorten the product development cycle, reduce the cost of opening and mass production.
  • FIG. 1 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing the structure of a backlight module according to an embodiment of the present invention.
  • FIG. 3 is a perspective view of an optical lens according to an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing the structure of an optical lens according to an embodiment of the present invention, and further showing an LED chip under the optical lens.
  • Figure 5 is a diagram of a plurality of optical lens combining processes in an embodiment of the present invention.
  • the first embodiment of the present invention provides a liquid crystal display device.
  • the liquid crystal display device includes a liquid crystal panel 100 and a backlight module 200 .
  • the liquid crystal panel 100 is disposed opposite to the backlight module 200 .
  • the display 200 provides a display light source to the liquid crystal panel 100 to cause the liquid crystal panel 200 to display an image.
  • the embodiment further provides a backlight module 200 applied to the above liquid crystal display device.
  • the backlight module 200 is a direct-lit LED backlight module, including a backplane backplane 1 and a plurality of LED chips 2 disposed on the backplane 1 , each LED chip 2 An optical lens 3 is disposed on the upper surface.
  • the plurality of LED chips 2 are arrayed on a printed circuit board 2a, and then the printed circuit board 2a is loaded on the backplane 1.
  • the optical lens 3 has a square structure having a top surface 31 and a bottom surface 32.
  • the bottom surface 32 defines a recess 32a to form a lens structure.
  • the LED chip 2 is housed in the recess 32a.
  • the groove 32a is in the shape of a truncated cone.
  • the groove 32a may also be arranged in a hemispherical shape.
  • the plurality of optical lenses 3 disposed on the plurality of LED chips 2 are of a split structure. After being assembled on the LED chip 2, the plurality of optical lenses 3 together form a light guide plate structure. 4. The top surface 31 of the plurality of optical lenses 3 is located on the same horizontal surface to form a light exit surface 5.
  • the plurality of optical lenses 3 may be connected to the printed circuit board 2a by means of pasting, and the plurality of optical lenses 3 are integrally connected by means of pasting.
  • the plurality of optical lenses 3 may be connected to the printed circuit board 2a by injection molding, and the plurality of optical lenses 3 may be directly integrated into one another during injection molding.
  • an optical lens is disposed on each LED chip, and the plurality of optical optical lenses can be combined to form a guide.
  • Light board structure Further, the plurality of optical lenses are separated structures, and the light guide plate structures of different sizes can be combined according to actual needs (mainly according to the area of the LED chip array required by the product specifications), and are applicable to products of various specifications, High interchangeability and versatility can effectively shorten the product development cycle and reduce the cost of opening and mass production.
  • the direct-lit LED backlight module further includes an optical film set 6 disposed on the light-emitting surface 5 .
  • the light emitted from the light source 2 is guided through the optical lens 3 (i.e., the light guide plate structure 4), and then emitted from the optical film group 6 to provide a display light source to the liquid crystal panel.

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

Abstract

一种直下式LED背光模组（200）和包含该背光模组（200）的液晶显示装置，所述背光模组（200）包括背板（1）以及阵列设置在背板（1）上的多个LED芯片（2），其中，每一LED芯片（2）对应覆设有一光学透镜（3）；所述光学透镜（3）具有一顶面（31）和一底面（32），所述底面（32）开设有一凹槽（32a）形成透镜结构，所述LED芯片（2）容置于所述凹槽（32a）中；其中，覆设于多个LED芯片（2）上的多个光学透镜（3）共同组成一导光板结构（4），多个光学透镜（3）的顶面（31）位于同一水平面上形成一出光面（5）。上述背光模组（200）中的导光介质具有很高的互换性和通用性，可以有效地缩短产品的开发周期，降低发开以及量产的成本。

Description

直下式LED背光模组以及液晶显示装置 技术领域
本发明涉及液晶显示器技术领域，尤其是一种直下式LED背光模组以及液晶显示装置。
背景技术
随着光电与半导体技术的演进，也带动了平板显示器(Flat Panel Display)的蓬勃发展，而在诸多平板显示器中，液晶显示器(Liquid Crystal Display，简称LCD)因具有高空间利用效率、低消耗功率、无辐射以及低电磁干扰等诸多优越特性，已成为市场的主流。液晶显示器通常包括液晶显示面板(Liquid Crystal Panel)与背光模块(Black Light Module，简称BL)。
由于液晶显示器是一种不具有自发光功能的被动式显示装置，故需加装背光模块以提供显示面板所需的显示光源，如此，背光模块产生的面光源是否具足够且均匀的亮度即直接影响液晶显示器的显示品质。又，LED具有发光效率高、寿命长及耗电量低等特性而成为背光模块的应用光源首选，目前，背光模块依其结构可分为侧光式(Edge Lighting)及直下式(Direct Lighting)两种。其中，直下式背光模块通过矩阵排列多个LED光源或平行置列多个LED灯管于一背板上，再藉该背板上的反射板将光源反射向上后经扩散板均匀分散，以期于其出光面获得平面式的均匀出光效果。由此可知，该直下式背光模块因将光源置于该出光面的正下方，故具有高辉度、良好出光视角及高光利用效率等特色而适用于超大尺寸显示器中，但却需使用数量较多的LED光源或LED灯管且需求较大的光源安置空间，造成模块整体的厚度、重量及耗电量增加而不利于现行电子产品微型化及环保节能的诉求。在LED背光模组中，为了使光源发出的光更加均匀，且减小混光空间，通常在光源的出光面前方设置有导光板或光学透镜。目前，现有的导光板或光学透镜都是具有较大面积的一整块式的结构，其尺寸通常都只适合一种规格的产品，其互换性和共用性(在多个规格的产品之间)较差，直接影响了产品的开发周期，增加了发开以及量产的成本。
发明内容
有鉴于此，本发明提供了一种直下式LED背光模组，其中的导光介质具有很高的互换性和通用性，可以有效地缩短产品的开发周期，降低了发开以及量产的成本。
为了达到上述目的，本发明采用了如下技术方案：
一种直下式LED背光模组，包括背板以及阵列设置在背板上的多个LED芯片，其中，每一LED芯片对应覆设有一光学透镜；所述光学透镜具有一顶面和一底面，所述底面开设有一凹槽形成透镜结构，所述LED芯片容置于所述凹槽中；其中，覆设于多个LED芯片上的多个光学透镜共同组成一导光板结构，多个光学透镜的顶面位于同一水平面上形成一出光面。
其中，所述多个LED芯片阵列地封装于一印刷电路板上。
其中，所述多个光学透镜通过粘帖的方式连接于所述印刷电路板上，所述多个光学透镜之间通过粘帖的方式练成一体。
其中，所述多个光学透镜通过注塑成型的方式连接于所述印刷电路板上，并且所述多个光学透镜之间在注塑成型的过程中直接练成一体。
其中，所述凹槽呈圆台状。
其中，所述光学透镜为方状结构。
其中，该背光模组还包括一光学膜片组，所述光学膜片组设置于所述出光面上.
本发明的还提供了一种液晶显示装置，包括液晶面板及背光模组，所述液晶面板与所述背光模组相对设置，所述背光模组提供显示光源给所述液晶面板，以使所述液晶面板显示影像，其中，所述背光模组为前述的背光模组。
本发明实施例提供的直下式LED背光模组，为了使为了使LED光源发出的光更加均匀，在每一LED芯片上对应覆设有一光学透镜，多个光学光学透镜又可组合形成一导光板结构。进一步地，多个光学透镜是分体式结构，可根据实际需要(主要根据LED芯片的数量)，组合获得不同尺寸的导光板结构，适用于多种不同规格的产品，具有很高的互换性和通用性，可以有效地缩短产品的开发周期，降低了发开以及量产的成本。
附图说明
图1是本发明实施例提供的液晶显示装置的结构示意图。
图2是本发明实施例提供的背光模组的结构剖面图。
图3是本发明实施例提供的光学透镜的立体图。
图4是本发明实施例提供的光学透镜的结构剖面图，图中还示出了位于光学透镜下方的LED芯片。
图5是本发明实施例中多个光学透镜组合过程的图示。
具体实施方式
下面将结合附图以及具体实施例，对本发明实施例中的技术方案进行详细地描述，显然，所描述的实施例仅仅是本发明一部分实例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护范围。
本实施例首先提供了一种液晶显示装置，参阅图1，该液晶显示装置包括液晶面板100及背光模组200，所述液晶面板100与所述背光模组200相对设置，所述背光模组200提供显示光源给所述液晶面板100，以使所述液晶面板200显示影像。
进一步地，本实施例还提供了应用于如上液晶显示装置中的背光模组200。
具体地，参阅图2至图5，该背光模组200为直下式LED背光模组，其包括背板背板1以及阵列设置在背板1上的多个LED芯片2，每一LED芯片2上对应覆设有一光学透镜3。其中，所述多个LED芯片2阵列地封装于一印刷电路板2a上，然后再将印刷电路板2a装载于所述背板1上。
进一步地，如图3和图4所示，所述光学透镜3为方状结构，其具有一顶面31和一底面32，所述底面32开设有一凹槽32a形成透镜结构，所述LED芯片2容置于所述凹槽32a中。本实施例中，所述凹槽32a呈圆台状，当然在另外的一些实施例中，所述凹槽32a也可以设置为半球状。
进一步地，如图5所示，覆设于多个LED芯片2上的多个光学透镜3为分体式结构，在组装于LED芯片2上完成后，多个光学透镜3共同组成一导光板结构4，多个光学透镜3的顶面31位于同一水平面上形成一出光面5。
其中，所述多个光学透镜3可以是通过粘帖的方式连接于所述印刷电路板2a上，并且所述多个光学透镜3之间通过粘帖的方式连成一体。或者也可以是：所述多个光学透镜3通过注塑成型的方式连接于所述印刷电路板2a上，并且所述多个光学透镜3之间在注塑成型的过程中直接连成一体。
在如上实施例提供的直下式LED背光模组中，为了使为了使LED光源发出的光更加均匀，在每一LED芯片上对应覆设有一光学透镜，多个光学光学透镜又可组合形成一导光板结构。进一步地，多个光学透镜是分体式结构，可根据实际需要(主要根据产品规格所需要的LED芯片阵列的面积)，组合获得不同尺寸的导光板结构，适用于多种不同规格的产品，具有很高的互换性和通用性，可以有效地缩短产品的开发周期，降低了发开以及量产的成本。
进一步地，该直下式LED背光模组还包括一光学膜片组6，所述光学膜片组6设置于所述出光面5上。光源2发出的光，经过光学透镜3(即导光板结构4)引导后，从光学膜片组6射出，提供显示光源给液晶面板。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
显然，本发明的保护范围并不局限于上诉的具体实施方式，本领域的技术人员可以对发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (14)

  1. 一种直下式LED背光模组，包括背板以及阵列设置在背板上的多个LED芯片，其中，每一LED芯片对应覆设有一光学透镜；所述光学透镜具有一顶面和一底面，所述底面开设有一凹槽形成透镜结构，所述LED芯片容置于所述凹槽中；其中，覆设于多个LED芯片上的多个光学透镜共同组成一导光板结构，多个光学透镜的顶面位于同一水平面上形成一出光面。
  2. 根据权利要求1所述的直下式LED背光模组，其中，所述多个LED芯片阵列地封装于一印刷电路板上。
  3. 根据权利要求2所述的直下式LED背光模组，其中，所述多个光学透镜通过粘帖的方式连接于所述印刷电路板上，所述多个光学透镜之间通过粘帖的方式连成一体。
  4. 根据权利要求2所述的直下式LED背光模组，其中，所述多个光学透镜通过注塑成型的方式连接于所述印刷电路板上，并且所述多个光学透镜之间在注塑成型的过程中直接连成一体。
  5. 根据权利要求1所述的直下式LED背光模组，其中，所述凹槽呈圆台状。
  6. 根据权利要求1所述的直下式LED背光模组，其中，所述光学透镜为方状结构。
  7. 根据权利要求1所述的直下式LED背光模组，其中，该背光模组还包括一光学膜片组，所述光学膜片组设置于所述出光面上。
  8. 一种液晶显示装置，包括液晶面板及背光模组，所述液晶面板与所述背光模组相对设置，所述背光模组提供显示光源给所述液晶面板，以使所述液晶面板显示影像，其中，所述背光模组为直下式LED背光模组，该背光模组包括背板以及阵列设置在背板上的多个LED芯片，其中，每一LED芯片对应覆设有一光学透镜；所述光学透镜具有一顶面和一底面，所述底面开设有一凹槽形成透镜结构，所述LED芯片容置于所述凹槽中；其中，覆设于多个LED芯片上的多个光学透镜共同组成一导光板结构，多个光学透镜的顶面位于同一水平面上形成一出光面。
  9. 根据权利要求8所述的液晶显示装置，其中，所述多个LED芯片阵列地 封装于一印刷电路板上。
  10. 根据权利要求9所述的液晶显示装置，其中，所述多个光学透镜通过粘帖的方式连接于所述印刷电路板上，所述多个光学透镜之间通过粘帖的方式连成一体。
  11. 根据权利要求9所述的液晶显示装置，其中，所述多个光学透镜通过注塑成型的方式连接于所述印刷电路板上，并且所述多个光学透镜之间在注塑成型的过程中直接连成一体。
  12. 根据权利要求8所述的液晶显示装置，其中，所述凹槽呈圆台状。
  13. 根据权利要求8所述的液晶显示装置，其中，所述光学透镜为方状结构。
  14. 根据权利要求8所述的液晶显示装置，其中，该背光模组还包括一光学膜片组，所述光学膜片组设置于所述出光面上。
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