WO2018201538A1 - Led灯条及背光组件 - Google Patents

Led灯条及背光组件 Download PDF

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Publication number
WO2018201538A1
WO2018201538A1 PCT/CN2017/086009 CN2017086009W WO2018201538A1 WO 2018201538 A1 WO2018201538 A1 WO 2018201538A1 CN 2017086009 W CN2017086009 W CN 2017086009W WO 2018201538 A1 WO2018201538 A1 WO 2018201538A1
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WO
WIPO (PCT)
Prior art keywords
light
led
light guide
led lamp
guide sheet
Prior art date
Application number
PCT/CN2017/086009
Other languages
English (en)
French (fr)
Inventor
谢晨
Original Assignee
武汉华星光电技术有限公司
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Publication date
Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US15/534,641 priority Critical patent/US10317604B2/en
Publication of WO2018201538A1 publication Critical patent/WO2018201538A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to 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
    • 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
    • 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
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • 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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened 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
    • G02B6/0033—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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame

Definitions

  • the invention relates to a liquid crystal display panel technology, in particular to an LED light bar and a backlight assembly.
  • double-crystal LED lamp beads or high-efficiency LED lamp beads reduces the number of LED lamp beads used, further increasing the spacing between the individual LED lamp beads, plus LED lights. As the brightness of the beads increases, the distinction between light and dark will be greater, so the risk of hotspot will increase.
  • the present invention provides an LED light bar and a backlight assembly, thereby alleviating the firefly spot phenomenon.
  • the invention provides an LED light bar, comprising a flexible circuit board and an LED lamp bead disposed on the flexible circuit board, and further comprising a light guide sheet disposed in the adjacent two LED lamp beads On a light-emitting surface, the light guide sheet includes at least one light-incident surface and one light-emitting surface, and both sides of the light-incident surface of the light guide sheet are adhered to the light-emitting surfaces of the two LED lamp beads at corresponding positions.
  • the light guide sheet is disposed on one side of the light emitting surface adjacent to the two LED lamp beads and the flexible circuit board.
  • a light guiding mesh point for emitting light is disposed on the light incident surface.
  • a prism structure for collecting light is provided on the light-emitting surface.
  • the prism structure is formed by interconnecting continuous V-shaped grooves.
  • the light guiding dots are composed of spherical pits arranged in an array.
  • the light guiding dots are composed of hemispherical pits arranged in an array.
  • the light guiding dot is disposed on the light incident surface corresponding to a gap position between two adjacent LED lamp beads.
  • the prism structure is disposed on the light emitting surface corresponding to a gap position between two adjacent LED lamp beads.
  • the present invention also provides a backlight assembly, including a middle frame, a light guide plate disposed in the middle frame, and an LED light bar, wherein a light emitting surface of the light guide plate is disposed opposite to a side of the light guide plate.
  • the present invention provides a light guide sheet on the light-emitting surface of two adjacent LED lamp beads, so that a part of the light emitted from the LED lamp bead enters the light guide sheet, and a part of the light is transferred to the light guide sheet to be transferred to the light guide sheet.
  • the gap between the two LED beads reduces the flare spot phenomenon.
  • FIG. 1 is a schematic structural view of an LED light bar of the present invention
  • FIG. 2 is a schematic structural view of a light incident surface of a light guide sheet of the present invention
  • FIG. 3 is a schematic structural view of a light-emitting surface of a light guide sheet of the present invention.
  • Figure 4 is a cross-sectional view of a light guide sheet of the present invention.
  • Figure 5 is a schematic view showing the connection of the present invention to a backlight assembly.
  • the LED light bar of the present invention comprises a flexible circuit board 1 and an LED lamp bead 2 disposed on the flexible circuit board 1 , and the connection manner between the flexible circuit board 1 and the LED lamp bead 2 in the present invention
  • the connection between the LED lamp bead 2 and the flexible circuit board 1 is the same, and the detailed description of the portion is not described herein.
  • the LED lamp bead 2 can be a single crystal LED lamp bead or a double crystal LED lamp.
  • the LED strip further includes a light guide 3, and the light guide 3 is disposed on one of the adjacent two LED bead 2
  • the light guide sheet 3 is configured to reflect the light emitted from the light emitting surface of the LED lamp bead 2 and finally emit it from the gap, thereby alleviating the Hotspot phenomenon;
  • the light guide sheet 3 includes at least one light-incident surface 4 and a light-emitting surface 5, and the light-emitting surface 4 of the light-guiding sheet 3 is attached to the edge of the light-emitting surface of the two LED lamp beads 2 at corresponding positions.
  • the double-sided adhesive bonding in the prior art can be used, and is not specifically limited herein.
  • the light incident surface 4 is formed by one surface of the light guide sheet 3, and the light exit surface 5 is formed by the other side surface of the light guide sheet 3 opposite to the light incident surface 4, so that the light incident surface 4 and the light exit surface 5 are opposed to each other.
  • the width of the light guide sheet 3 is equal to the thickness of the LED lamp bead 2.
  • the light guide sheet 3 is disposed on one of the side surfaces of the two LED lamp beads 2 adjacent to the flexible circuit board 1.
  • a light guide dot 6 for emitting light is disposed on the light incident surface 4, and the light guide dot 6 is composed of spherical pits 61 arranged in an array, and the distance between adjacent pits 61 is equal.
  • the light guiding dots 6 are constituted by hemispherical pits 61 arranged in an array.
  • a prism structure for collecting light is provided on the light-emitting surface 5, and the prism structure is formed by connecting successive V-shaped grooves 7 to each other.
  • V-shaped grooves 7 are connected to each other, A convex portion having a triangular cross section is formed between the adjacent two V-shaped grooves 7, and the prism structure is opposite to the position where the light guiding mesh point 6 is disposed; the number of the V-shaped grooves 7 can be set according to actual needs, and no specificity is made here. limited.
  • the light guiding mesh point 6 is disposed on the light incident surface 4 corresponding to the gap position between the adjacent two LED lamp beads 2; the prism structure is disposed on the light emitting surface. 5 corresponds to the position of the gap between the adjacent two LED lamp beads 2, so that the two ends of the light guide sheet 3 are formed with the connecting arm 31, and the connecting arm 31 and the edge of the light emitting surface of the adjacent two LED lamp beads 2 fit.
  • the present invention further discloses a backlight assembly including a middle frame 8, a light guide plate 9 disposed in the middle frame 8, and the LED light bar 10, and the backlight assembly further includes a middle frame 8 away from the liquid crystal.
  • a reflection sheet 11 on one side of the panel the reflection sheet 11 is fixedly connected to the middle frame 8 by a double-sided tape, and an optical film group is disposed on a surface of the light guide plate 9 opposite to the liquid crystal panel, and the light guide plate 9 includes an inlet.
  • the LED lamp bead 2 of the LED light bar 10 is disposed opposite to the reflective sheet 11, so that the three light-emitting surfaces of the LED lamp bead 2 are respectively opposite to the reflective sheet 11 and the light guide plate.
  • the light-incident side of the 9 and the middle frame 8 are opposite to each other, and a receiving portion 12 is formed on one side edge of the LED lamp bead 2 between the light guide plate 9 and the optical film group, and a portion opposite to the receiving portion 12 on the middle frame 8
  • the side ie, the side of the middle frame 8 opposite to the reflection sheet 11
  • a light-shielding tape 14 is disposed on a surface of the middle frame 8 opposite to the liquid crystal panel.
  • the light-shielding tape 14 covers the surface of the middle frame 8 opposite to the liquid crystal panel, and the flexible circuit board 1 and the liquid crystal panel are opposite each other.
  • the optical film panel opposite to the liquid crystal panel, the flexible circuit board 1 is fixed on the light shielding tape 14; the light emitting surface 5 of the light guide sheet 3 is disposed opposite to the light guide plate 9, the optical
  • the diaphragm group may include a diffusion film 15, a lower prism film 16, and an upper prism film 17 which are disposed in this order from the bottom to the top.
  • the light-emitting surface 5 of the light guide sheet 3 is disposed opposite to the light-incident side of the light guide plate 9.
  • the light guiding sheet 3 is prepared from a PC (polycarbonate) or PMMA (polymethyl methacrylate) material.
  • the invention can modify the structure of the LED lamp bead 2 without changing the original structure of the backlight assembly, so that the Hotspot phenomenon of the backlight assembly is alleviated.

Abstract

一种LED灯条(10)，包括软性电路板(1)以及设置在软性电路板(1)上的LED灯珠(2)，还包括导光片(3)，导光片(3)设置在相邻两个LED灯珠(2)其中一出光面上，导光片(3)至少包括一入光面(4)以及一出光面(5)，导光片(3)的入光面(4)两端与对应位置上的两个LED灯珠(2)的出光面贴合。还提供一种背光组件，包括中框(8)、设于中框(8)内的导光板(9)，还包括LED灯条(10)，导光片(3)的出光面(5)与导光板(9)相对设置。与现有技术相比，在相邻两个LED灯珠(2)的出光面上设置导光片(3)，使LED灯珠(2)发出的光一部分进入导光片(3)，经过导光片(3)的反射将一部分光线转移到两个LED灯珠(2)之间的间隙，从而缓解萤火虫光斑现象。

Description

LED灯条及背光组件 技术领域
本发明涉及一种液晶显示面板技术，特别是一种LED灯条及背光组件。
背景技术
在液晶显示面板的背光组件中有一种hotspot现象(萤火虫光斑现象)是必须避免的。该现象表现为，在背光组件的LED灯条侧观察到明显的呈间隔分布的亮斑。其出现的原因为，在软性电路板上间隔分布的LED灯珠发光时，受制于本身120°的发光角以及不均匀的亮度分布，使LED灯珠的间隙区域的亮度大大低于LED灯珠出光面的亮度，导光板靠近LED灯珠的一侧出现亮暗斑。
随着LED技术的发展，目前有一种双晶LED灯珠，它在一颗LED灯珠中封入两个发光芯片，相对于普通的3.8mm宽度的单晶LED灯珠，其亮度提升了1.8倍左右，而宽度仅增加了约0.4mm，若采用这种LED灯珠作为光源，则可以在减少LED灯条的LED灯珠颗数的同时达到更高的亮度。可看出，高亮度、高发光效率是未来LED的发展方向。但这样会带来一个问题。在同样的尺寸条件下，采用双晶LED灯珠或者高发光效率的LED灯珠，减少了LED灯珠的使用颗数，使得各个LED灯珠之间的间隔进一步增大，再加上LED灯珠自身亮度的提升，明暗区分会更大，因此，出现hotspot现象的风险也随之上升。
发明内容
为克服现有技术的不足，本发明提供一种LED灯条及背光组件，从而缓解萤火虫光斑现象。
本发明提供了一种LED灯条，包括软性电路板以及设置在软性电路板上的LED灯珠，还包括导光片，所述导光片设置在相邻两个LED灯珠的其中一出光面上，所述导光片至少包括一入光面以及一出光面，所述导光片的入光面两侧与对应位置上的两个LED灯珠的出光面贴合。
进一步地，所述导光片设置在两个LED灯珠与软性电路板相邻的其中一侧出光面上。
进一步地，所述入光面上设有用于出光的导光网点。
进一步地，所述出光面上设有用于聚光的棱镜结构。
进一步地，所述棱镜结构由连续的V形凹槽相互连接构成。
进一步地，所述导光网点由阵列排布的球形的凹点构成。
进一步地，所述导光网点由阵列排布的半球形的凹点构成。
进一步地，所述导光网点设置在入光面上与相邻两个LED灯珠之间的间隙位置相对应处。
进一步地，所述棱镜结构设置在出光面上与相邻两个LED灯珠之间的间隙位置相对应处。
本发明还提供了一种背光组件，包括中框、设于中框内的导光板，还包括所述的LED灯条，所述导光片的出光面与导光板的侧边相对设置。
本发明与现有技术相比，在相邻两个LED灯珠的出光面上设置导光片，使LED灯珠发出的光一部分进入导光片，经过导光片的反射将一部分光线转移到两个LED灯珠之间的间隙，从而缓解萤火虫光斑现象。
附图说明
图1是本发明LED灯条的结构示意图；
图2是本发明导光片的入光面的结构示意图；
图3是本发明导光片的出光面的结构示意图；
图4是本发明导光片的剖面图；
图5是本发明与背光组件的连接示意图。
具体实施方式
下面结合附图和实施例对本发明作进一步详细说明。
如图1所示，本发明的LED灯条包括软性电路板1以及设置在软性电路板1上的LED灯珠2，本发明中软性电路板1与LED灯珠2的连接方式与现有技术中LED灯珠2与软性电路板1之间的连接相同，在此不对该部分进行详细的赘述，本发明中LED灯珠2可以为单晶LED灯珠也可以为双晶LED灯珠，在此不做具体限定；下面对本发明的改进点进行说明，所述LED灯条还包括导光片3，导光片3设置在相邻两个LED灯珠2的其中一出光面上，导光片3用于将LED灯珠2的出光面发出的光进行反射最后使其从间隙中射出，从而缓解Hotspot现象；
如图4所示，导光片3至少包括一入光面4以及一出光面5，导光片3的入光面4两侧与对应位置上的两个LED灯珠2的出光面边缘贴合，导光片3与LED灯珠2的连接方式可采用现有技术中的双面胶粘接，在此不做具体限定。
所述入光面4由导光片3的一侧表面形成，出光面5由导光片3与入光面4相对的另一侧表面形成，使入光面4与出光面5相对设置。具体地，导光片3的宽度与LED灯珠2的厚度相等。
作为本发明的一种实施方式，如图1所示，导光片3设置在两个LED灯珠2与软性电路板1相邻的其中一侧出光面上。
如图2和图4所示，在入光面4上设有用于出光的导光网点6，导光网点6由阵列排布的球形的凹点61构成，相邻的凹点61的距离相等；具体地，导光网点6由阵列排布的半球形的凹点61构成。
如图3和图4所示，在出光面5上设有用于聚光的棱镜结构，所述棱镜结构由连续的V形凹槽7相互连接后构成，当V形凹槽7相互连接后，在相邻两个V形凹槽7之间形成有截面为三角形的凸部，棱镜结构与导光网点6的设置位置相对；V形凹槽7的数量可根据实际需要设置，在此不作具体限定。
如图1所示，作为本发明的一种实施方式，导光网点6设置在入光面4上与相邻两个LED灯珠2之间的间隙位置相对应处；棱镜结构设置在出光面5上与相邻两个LED灯珠2之间的间隙位置相对应处，使导光片3的两端形成有连接臂31，连接臂31与相邻两个LED灯珠2的出光面边缘贴合。
如图5所示，本发明还公开了一种背光组件，包括中框8、设于中框8内的导光板9以及上述的LED灯条10，背光组件还包括设于中框8远离液晶面板一侧的反射片11，反射片11通过双面胶与中框8连接固定，在导光板9与液晶面板相对的一侧表面上设有光学膜片组，所述导光板9包括一入光侧以及一出光侧，其中入光侧由导光板9与中框8相对的一侧边缘构成，所述出光侧由导光板9与光学膜片组相对的一侧表面构成，LED灯条10设于中框8与导光板9的入光侧之间，LED灯条10的LED灯珠2与反射片11相对设置，使LED灯珠2的三个出光面分别与反射片11、导光板9的入光侧以及中框8相对，在导光板9与光学膜片组之间位于LED灯珠2的一侧边缘形成容置部12，在中框8上与容置部12相对的一侧(即中框8设有反射片11相反的一侧)设有放置平台13，软性电路板1的两侧长边置于容置部12以及放置平台13中，在中框8与液晶面板相对的一侧表面设有遮光胶带14，遮光胶带14覆盖在中框8与液晶面板相对的一侧表面、软性电路板1与液晶面板相对的一侧表面以及光学膜片组与液晶面板相对的一侧表面边缘，软性电路板1固定于遮光胶带14上；所述导光片3的出光面5与导光板9的相对设置，所述光学膜片组可以包括自下而上依次设置的扩散膜15、下棱镜膜16以及上棱镜膜17。
具体地，导光片3的出光面5与导光板9的入光侧相对设置。
作为本发明的一种实施方式，导光片3由PC(聚碳酸酯)或PMMA(聚甲基丙烯酸甲酯)材料制备得到。
下面对本发明的工作原理进行说明：
当LED灯条工作时，LED灯珠2与导光片3相对一侧的出光面射出的光线一部分进入导光板，在其内全反射传播，光线射到各个凹点61时，反射光会往各个角度扩散，然后破坏反射条件由导光片3的出光面5射出，被破坏的反射光经棱镜结构聚光后射出，这样能将一部分光转移到LED灯珠2之间的间隙处射出，减缓Hotspot现象。
本发明能够在不改变背光组件原有结构的基础下，通过对LED灯珠2的结构进行改造，使背光组件的Hotspot现象得到缓解。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (18)

  1. 一种LED灯条，包括软性电路板以及设置在软性电路板上的LED灯珠，其中：还包括导光片，所述导光片设置在相邻两个LED灯珠的其中一出光面上，所述导光片至少包括一入光面以及一出光面，所述导光片的入光面两侧与对应位置上的两个LED灯珠的出光面贴合。
  2. 根据权利要求1所述的LED灯条，其中：所述导光片设置在两个LED灯珠与软性电路板相邻的其中一侧出光面上。
  3. 根据权利要求1所述的LED灯条，其中：所述入光面上设有用于出光的导光网点。
  4. 根据权利要求1所述的LED灯条，其中：所述出光面上设有用于聚光的棱镜结构。
  5. 根据权利要求4所述的LED灯条，其中：所述棱镜结构由连续的V形凹槽相互连接构成。
  6. 根据权利要求3所述的LED灯条，其中：所述导光网点由阵列排布的球形的凹点构成。
  7. 根据权利要求6所述的LED灯条，其中：所述导光网点由阵列排布的半球形的凹点构成。
  8. 根据权利要求3所述的LED灯条，其中：所述导光网点设置在入光面上与相邻两个LED灯珠之间的间隙位置相对应处。
  9. 根据权利要求4所述的LED灯条，其中：所述棱镜结构设置在出光面上与相邻两个LED灯珠之间的间隙位置相对应处。
  10. 一种背光组件，包括中框、设于中框内的导光板，其中：还包括LED灯条，所述LED灯条包括软性电路板以及设置在软性电路板上的LED灯珠，还包括导光片，所述导光片设置在相邻两个LED灯珠的其中一出光面上，所述导光片至少包括一入光面以及一出光面，所述导光片的入光面两侧与对应位置上的两个LED灯珠的出光面贴合；所述导光片的出光面与导光板的侧边相 对设置。
  11. 根据权利要求10所述的背光组件，其中：所述导光片设置在两个LED灯珠与软性电路板相邻的其中一侧出光面上。
  12. 根据权利要求10所述的背光组件，其中：所述入光面上设有用于出光的导光网点。
  13. 根据权利要求10所述的背光组件，其中：所述出光面上设有用于聚光的棱镜结构。
  14. 根据权利要求13所述的背光组件，其中：所述棱镜结构由连续的V形凹槽相互连接构成。
  15. 根据权利要求12所述的背光组件，其中：所述导光网点由阵列排布的球形的凹点构成。
  16. 根据权利要求15所述的背光组件，其中：所述导光网点由阵列排布的半球形的凹点构成。
  17. 根据权利要求12所述的背光组件，其中：所述导光网点设置在入光面上与相邻两个LED灯珠之间的间隙位置相对应处。
  18. 根据权利要求13所述的背光组件，其中：所述棱镜结构设置在出光面上与相邻两个LED灯珠之间的间隙位置相对应处。
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