WO2018161388A1 - 用于背光组件的led灯条及背光组件 - Google Patents

用于背光组件的led灯条及背光组件 Download PDF

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Publication number
WO2018161388A1
WO2018161388A1 PCT/CN2017/078615 CN2017078615W WO2018161388A1 WO 2018161388 A1 WO2018161388 A1 WO 2018161388A1 CN 2017078615 W CN2017078615 W CN 2017078615W WO 2018161388 A1 WO2018161388 A1 WO 2018161388A1
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WIPO (PCT)
Prior art keywords
backlight assembly
circuit board
disposed
led
light bar
Prior art date
Application number
PCT/CN2017/078615
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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 US15/521,673 priority Critical patent/US10185077B2/en
Publication of WO2018161388A1 publication Critical patent/WO2018161388A1/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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02B6/0085—Means for removing heat created by the light source from the package
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • G02B6/0066—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
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • 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
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02B6/009—Positioning aspects of the light source in the package
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • 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
    • 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
    • G02F1/133628—Illuminating devices with cooling means

Definitions

  • the invention relates to a liquid crystal panel technology, in particular to an LED light bar and a backlight assembly for a backlight assembly.
  • high-brightness screens have become the mainstream of the smart device market.
  • the screen When the screen is to be highlighted, it needs to be matched with high-brightness backlight components.
  • the high-brightness backlight components also bring high energy consumption and high heat production.
  • the high temperature of the backlight assembly causes a problem of a local temperature rise of the smart device.
  • the heat generation of the backlight assembly is mainly concentrated on the LED lamp bead. Since the inside of the backlight is relatively closed, excessive heat will cause the local temperature around the LED lamp bead to be too high, and the closer the LED strip is to the middle part, the higher the temperature, the nearby optics. The diaphragm is wrinkled due to excessive temperature difference between the lateral and longitudinal directions, causing black shadows in the visible area of the backlight, which directly leads to product function failure.
  • the present invention provides an LED light bar and a backlight assembly for a backlight assembly, thereby improving the heat dissipation capability of the backlight.
  • the present invention provides an LED light bar for a backlight assembly, comprising a light strip circuit board and an LED lamp bead disposed on the light strip circuit board, wherein the light strip circuit board is provided with a notch on one long side thereof.
  • the notch forms a first embedding portion, and the first embedding portion is provided with a heat dissipating portion.
  • a second embedded portion extending in a longitudinal direction of the other side of the light strip circuit board is disposed between the LED pads of the light strip circuit board on the first embedded portion, and the second embedded portion is located on the heat dissipation portion.
  • An extension filled with the second embedded portion is provided at the portion.
  • the light strip circuit board is an FPC flexible circuit board.
  • a silica gel layer is disposed at a position between the LED lamp bead and the extension portion.
  • the second embedding portion is disposed between two LED pads corresponding to each LED lamp bead.
  • the heat dissipating portion and the extending portion are graphite sheets or heat conductive metal sheets.
  • the invention also provides a backlight assembly, comprising a light guide plate disposed in the middle frame, further comprising the LED light strip for the backlight assembly; and an optical film on a surface of the light guide plate opposite to the liquid crystal display panel a sheet, a side opposite to the liquid crystal display panel is provided with a reflective sheet; a gap for placing the LED lamp bead is disposed between the light guide plate and the middle frame, and the LED lamp bead is disposed in the gap and is disposed downward
  • the light strip circuit board is disposed on a side surface of the middle frame and the light guide plate opposite to the liquid crystal display panel, and the heat dissipating portion is disposed on one side of the middle frame and is in contact with the middle frame.
  • the middle frame is provided with a groove at the heat dissipation portion, and the groove, the gap and the side edge of the light guide plate opposite to the liquid crystal display panel form a light bar placement portion.
  • a side of the middle frame opposite to the liquid crystal display panel is provided with a light shielding tape, and the light shielding tape extends to the edge of the optical film.
  • the optical film includes a diffusion film and a prism film which are disposed in this order from bottom to top.
  • the heat dissipation portion of the LED lamp bead is transmitted to the outside of the backlight assembly through the light strip circuit board, thereby reducing the central heat generation of the LED light bar and improving the heat dissipation of the backlight assembly.
  • Figure 1 is a front elevational view of the LED light bar of the present invention
  • Figure 2 is a plan view of the LED light bar of the present invention.
  • FIG. 3 is a schematic structural view of a light strip circuit board of the present invention.
  • FIG. 4 is a schematic structural view of a backlight assembly of the present invention.
  • an LED light bar for a backlight assembly of the present invention includes an LED light bar body 1 including a strip-shaped light bar circuit board 2 and a light bar circuit.
  • the LED lamp bead 3 on the board 2, the LED lamp bead 3 is evenly distributed on the lamp strip circuit board 2, and the spacing is equal; a notch is formed on one long side of the strip circuit board 2, the notch is rectangular, and the notch through lamp
  • the front and rear sides of the strip circuit board 2, the notch forms a first embedding portion 4, and the first embedding portion 4 is provided with a heat dissipating portion 5, and the shape of the heat dissipating portion 5 is adapted to the shape of the first embedding portion 4;
  • the heat dissipating portion 5 is capable of absorbing and transmitting heat generated by the LED lamp bead 3, so that the central heat of the lamp strip circuit board 2 is lowered to prevent heat from being transmitted to the optical film, resulting in a dark region formed by wrinkles of the optical film.
  • the light strip circuit board 2 adopts an FPC flexible circuit board, and the heat radiating portion 5 is directly pressed on the FPC flexible circuit board in the manufacturing process of the FPC flexible circuit board, thereby saving the thickness of the light strip circuit board 2.
  • the first embedded portion 4 is disposed between the LED pads 9 of the light strip circuit board 2 toward the other side of the light strip circuit board 2
  • the second embedded portion 6 and the second embedded portion 6 are rectangular.
  • a rectangular sawtooth structure is formed, and the heat sink portion 5 is disposed at the second embedded portion 6.
  • the extension 7 of the second embedded portion 6 is filled.
  • the second embedding portion 6 is disposed between the two LED pads 9 corresponding to each of the LED bead 3s, and the second embedding portion 6 needs to ensure that the two LED pads 9 corresponding to each of the LED bead 3 are not connected.
  • the extension portion 7 is adhered to the back surface of the lamp bead 3 of the LE, so that the heat emitted by the LED lamp bead 3 can be sufficiently absorbed and transferred to the light strip circuit board 2 away from the optical film of the backlight assembly. Side edges to further prevent heat from being conducted to the optical film.
  • a silica gel layer 8 is provided at a position between the LED lamp bead 3 and the extending portion 7, and the silicone layer 8 is pre-coated. Since the LED lamp bead is soldered, the solder on the LED pad 9 has a certain height. Therefore, the silicone layer 8 is disposed between the extending portion 7 and the LED lamp bead 3 to ensure that the LED lamp bead is in contact with the heat dissipating material to achieve direct heat dissipation.
  • the heat dissipating portion 5 and the extending portion 7 are graphite sheets or heat conductive metal sheets, and the heat dissipating portion 5 and the extending portion 7 are integrally formed.
  • the backlight assembly of the present invention includes a light guide plate 11 disposed in the middle frame 10, and further includes the above-mentioned LED light bar for the backlight assembly.
  • the specific structure of the backlight assembly is as follows:
  • a light guide plate 11 is disposed in the middle frame 10, and an optical film 13 is disposed on a surface of the light guide plate 11 opposite to the liquid crystal display panel.
  • the edge of the optical film 13 is shorter than the light guide plate 11 to make the edge of the light guide plate 11
  • a falling surface having a drop is formed between the optical film 13 and the reflective film 14 is disposed on the opposite side of the liquid crystal display panel.
  • the reflective sheet 14 is bonded to the middle frame 10 by the double-sided tape, and the light guide plate 11 is placed.
  • a gap for placing the LED lamp bead 3 is disposed between the light guide plate 11 and the middle frame 10, and the LED lamp bead 3 is disposed in the gap and disposed downwardly opposite to the reflective sheet 14, the light strip circuit board 2
  • the heat dissipation portion 5 is disposed on one side of the middle frame 10 and is in contact with the middle frame 10; the LED lamp is disposed through the heat dissipation portion 5; the heat dissipation portion 5 is disposed on one side of the middle frame 10 and opposite to the liquid crystal display panel;
  • the heat of the beads 3 is conducted to the middle frame 10, keeping the heat away from the optical film, thereby preventing the optical film wrinkles from causing dark areas of the backlight.
  • a groove 15 is disposed on the middle frame 10 at the heat dissipating portion 5.
  • the bottom portion of the groove 15 has an L-shaped cross section, and the groove 15 has two slots, one of which penetrates the side of the middle frame 10 opposite to the liquid crystal display panel.
  • a surface, the other side of the inner frame 10 opposite to the light guide plate 11; the groove 15, the gap and the side edge (the falling surface) of the light guide plate 11 opposite to the liquid crystal display panel form the light bar placement portion 16, and the light bar is placed
  • the portion 16 is of a T shape, and the LED lamp bead 3 on the light strip circuit board 2 faces downward, and is placed in the gap, and the light bar circuit board 2 is disposed in the light bar placement portion 16.
  • the heat dissipation portion 5 It is located in the groove 15 and fits the surface of the groove 15.
  • the side of the middle frame 10 opposite to the liquid crystal display panel is provided with a light-shielding tape 17, one side of the light-shielding tape 17 is attached to the middle frame 10, and the other side is extended to the edge of the optical film 13, the light strip circuit board The back side of 2 is attached to the light-shielding tape 17.
  • the optical film 13 includes a diffusion film 12 and a prism film 18 which are disposed in this order from bottom to top; the prism film 18 includes a lower prism film and an upper prism film.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

一种用于背光组件的LED灯条，包括灯条电路板（2）以及设于灯条电路板（2）上的LED灯珠（3），灯条电路板（2）的一侧长边上设有缺口，缺口形成第一嵌入部（4），在第一嵌入部（4）中设有散热部（5）。一种背光组件，包括设于中框（10）中的导光板（11），还包括用于背光组件的LED灯条。与现有技术相比，通过灯条电路板（2）上设置散热部（5），使LED灯珠（3）的热量被传导至背光组件外，从而降低了LED灯条的中心发热量，实现提高背光组件的散热能力，防止光学膜片（13）褶皱导致背光组件中出现背光暗区。

Description

用于背光组件的LED灯条及背光组件 技术领域
本发明涉及一种液晶面板技术，特别是一种用于背光组件的LED灯条及背光组件。
背景技术
如今高亮度的屏幕已经成为智能设备市场的主流，屏幕要做到高亮就需要搭配高亮度的背光组件，而高亮度的背光组件同时也带来了高能耗、高产热的问题，在屏幕长时间被点亮时，背光组件的高温，会带来智能设备局部温度升高的问题。
背光组件的产热主要集中在LED灯珠上，由于背光内部较为封闭，过多的热量会导致LED灯珠周围局部温度过高，而LED灯条越靠近中间的部分温度越高，附近的光学膜片因为横向、纵向温差过大而导致褶皱，引起背光可视区出现黑影，直接导致产品功能失效。
市面上现有的智能设备大多是在反射片背后贴一整面石墨片，以石墨片的导热能力缩小各区域的温差，防止出现褶皱，但是这种方式会增加背光组件的厚度，同时大面积的石墨片会带来成本上升。
发明内容
为克服现有技术的不足，本发明提供一种用于背光组件的LED灯条及背光组件，从而提高背光的散热能力。
本发明提供了一种用于背光组件的LED灯条，包括灯条电路板以及设于灯条电路板上的LED灯珠，所述灯条电路板的一侧长边上设有缺口，所述缺口形成第一嵌入部，在第一嵌入部中设有散热部。
进一步地，所述第一嵌入部上位于灯条电路板的LED焊盘之间设有朝灯条电路板的另一侧长边方向延伸的第二嵌入部，在散热部上位于第二嵌入部处设有填满第二嵌入部的延伸部。
进一步地，所述灯条电路板为FPC软电路板。
进一步地，所述LED灯珠与延伸部之间的位置处设有硅胶层。
进一步地，所述第二嵌入部设于每个LED灯珠对应的两个LED焊盘之间。
进一步地，所述散热部与延伸部为石墨片或导热金属片。
本发明还提供了一种背光组件，包括设于中框中的导光板，还包括所述的用于背光组件的LED灯条；在导光板与液晶显示面板相对的一侧表面设有光学膜片，所述导光板与液晶显示面板相反的一侧设有反射片；在导光板与中框之间设有用于放置LED灯珠的空隙，所述LED灯珠设于空隙中并且朝下设置与反射片相对，灯条电路板设于中框以及导光板与液晶显示面板相对的一侧表面上；所述散热部设置在中框的一侧并且与中框相互贴合接触。
进一步地，所述中框上位于散热部处设有凹槽，凹槽、空隙以及导光板与液晶显示面板相对的一侧边缘形成灯条放置部。
进一步地，所述中框上与液晶显示面板相对的一侧设有遮光胶带，遮光胶带延伸至光学膜片的边缘处。
进一步地，所述光学膜片包括由下至上依次设置的扩散膜、棱镜膜。
本发明与现有技术相比，通过灯条电路板上设至散热部，使LED灯珠的热量被传导至背光组件外，从而降低了LED灯条的中心发热量，实现提高背光组件的散热能力，防止光学膜片褶皱导致背光组件中出现背光暗区。
附图说明
图1是本发明LED灯条的主视图；
图2是本发明LED灯条的俯视图；
图3是本发明灯条电路板的结构示意图；
图4是本发明背光组件的结构示意图。
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和图2所示，本发明的用于背光组件的LED灯条，包括LED灯条本体1，所述LED灯条本体1包括条状的灯条电路板2以及设于灯条电路板2上的LED灯珠3，LED灯珠3均匀分布在灯条电路板2上，而且间距相等；在灯条电路板2的一侧长边上设有缺口，缺口为矩形，缺口贯通灯条电路板2的前后两侧表面，所述缺口形成第一嵌入部4，在第一嵌入部4中设有散热部5，散热部5的形状与第一嵌入部4的形状相适配；散热部5能够将LED灯珠3发出的热量吸收传导，使灯条电路板2的中心热量降低防止热量传导至光学膜片处，导致光学膜片受热出现褶皱而形成的暗区。
本发明中灯条电路板2采用FPC软电路板，散热部5通过在FPC软电路板制造过程中直接压合在FPC软电路板上，这样可以节省灯条电路板2的厚度。
作为本发明的一种较佳方式，如图3所示，第一嵌入部4上位于灯条电路板2的LED焊盘9之间设有朝灯条电路板2的另一侧长边方向延伸的第二嵌入部6，第二嵌入部6为矩形，当第一嵌入部4与第二嵌入部6组合后形成矩形锯齿状结构，在散热部5上位于第二嵌入部6处设有填满第二嵌入部6的延伸部7。
第二嵌入部6设于每个LED灯珠3对应的两个LED焊盘9之间，第二嵌入部6需要保证与每个LED灯珠3对应的两个LED焊盘9之间不连接，而其中的延伸部7与LE的灯珠3的背面贴合，这样能够充分的吸收LED灯珠3所发出的热量，并将其转移至灯条电路板2远离背光组件光学膜片的一侧边缘，从而进一步防止热量传导至光学膜片处。
如图2所示，在LED灯珠3与延伸部7之间的位置处设有硅胶层8，硅胶层8为预涂，由于LED灯珠焊接时，LED焊盘9上的焊锡有一定高度，因此延伸部7与LED灯珠3之间设置硅胶层8，才能够保证LED灯珠与散热材料相接触，达到直接散热的效果。
本发明中，散热部5与延伸部7为石墨片或导热金属片，散热部5与延伸部7为一体结构。
如图4所示，本发明的背光组件，包括设于中框10中的导光板11，还包括上述的用于背光组件的LED灯条，背光组件的具体结构如下：
所述中框10中设有导光板11，在导光板11与液晶显示面板相对的一侧表面设有光学膜片13，光学膜片13的边缘短于导光板11，使导光板11的边缘与光学膜片13之间形成具有落差的落差面，导光板11与液晶显示面板相反的一侧设有反射片14，反射片14通过双面胶与中框10相互粘合，导光板11放置在反射片14上；在导光板11与中框10之间设有用于放置LED灯珠3的空隙，LED灯珠3设于空隙中并且朝下设置与反射片14相对，灯条电路板2设于中框10以及导光板11与液晶显示面板相对的一侧表面上；所述散热部5设置在中框10的一侧并且与中框10相互贴合接触；通过散热部5将LED灯珠3的热量传导至中框10处，使热量远离了光学膜片，从而防止光学膜片褶皱导致出现背光暗区。
在中框10上位于散热部5处设有凹槽15，凹槽15的底部截面形状为L字形，凹槽15具有两个槽孔，其中一个贯穿中框10与液晶显示面板相对的一侧表面，另一个贯穿中框10与导光板11相对的一侧表面；凹槽15、空隙以及导光板11与液晶显示面板相对的一侧边缘(落差面)形成灯条放置部16，灯条放置部16为T字型，灯条电路板2上的LED灯珠3朝下，放入空隙中，而灯条电路板2设于灯条放置部16中，这里需要注意的是，散热部5刚好位于凹槽15中，并且与凹槽15的表面贴合。
所述中框10上与液晶显示面板相对的一侧设有遮光胶带17，遮光胶带17的一侧与中框10贴合，另一侧延伸至光学膜片13的边缘处，灯条电路板2的背面贴附在遮光胶带17上。
本发明中，光学膜片13包括由下至上依次设置的扩散膜12、棱镜膜18；棱镜膜18包括下棱镜膜和上棱镜膜。
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 (19)

  1. 一种用于背光组件的LED灯条，包括灯条电路板以及设于灯条电路板上的LED灯珠，其中：所述灯条电路板的一侧长边上设有缺口，所述缺口形成第一嵌入部，在第一嵌入部中设有散热部。
  2. 根据权利要求1所述的用于背光组件的LED灯条，其中：所述第一嵌入部上位于灯条电路板的LED焊盘之间设有朝灯条电路板的另一侧长边方向延伸的第二嵌入部，在散热部上位于第二嵌入部处设有填满第二嵌入部的延伸部。
  3. 根据权利要求1所述的用于背光组件的LED灯条，其中：所述灯条电路板为FPC软电路板。
  4. 根据权利要求2所述的用于背光组件的LED灯条，其中：所述灯条电路板为FPC软电路板。
  5. 根据权利要求3所述的用于背光组件的LED灯条，其中：所述LED灯珠与延伸部之间的位置处设有硅胶层。
  6. 根据权利要求4所述的用于背光组件的LED灯条，其中：所述LED灯珠与延伸部之间的位置处设有硅胶层。
  7. 根据权利要求5所述的用于背光组件的LED灯条，其中：所述第二嵌入部设于每个LED灯珠对应的两个LED焊盘之间。
  8. 根据权利要求6所述的用于背光组件的LED灯条，其中：所述第二嵌入部设于每个LED灯珠对应的两个LED焊盘之间。
  9. 根据权利要求7所述的用于背光组件的LED灯条，其中：所述散热部与延伸部为石墨片或导热金属片。
  10. 根据权利要求8所述的用于背光组件的LED灯条，其中：所述散热部与延伸部为石墨片或导热金属片。
  11. 一种背光组件，包括设于中框中的导光板，其中：还包括用于背光组 件的LED灯条；所述用于背光组件的LED灯条包括灯条电路板以及设于灯条电路板上的LED灯珠，所述灯条电路板的一侧长边上设有缺口，所述缺口形成第一嵌入部，在第一嵌入部中设有散热部；在导光板与液晶显示面板相对的一侧表面设有光学膜片，所述导光板与液晶显示面板相反的一侧设有反射片；在导光板与中框之间设有用于放置LED灯珠的空隙，所述LED灯珠设于空隙中并且朝下设置与反射片相对，灯条电路板设于中框以及导光板与液晶显示面板相对的一侧表面上；所述散热部设置在中框的一侧并且与中框相互贴合接触。
  12. 根据权利要求11所述的背光组件，其中：所述中框上位于散热部处设有凹槽，凹槽、空隙以及导光板与液晶显示面板相对的一侧边缘形成灯条放置部。
  13. 根据权利要求12所述的背光组件，其中：所述中框上与液晶显示面板相对的一侧设有遮光胶带，遮光胶带延伸至光学膜片的边缘处。
  14. 根据权利要求11所述的背光组件，其中：所述光学膜片包括由下至上依次设置的扩散膜、棱镜膜。
  15. 根据权利要求11所述的用于背光组件的LED灯条，其中：所述第一嵌入部上位于灯条电路板的LED焊盘之间设有朝灯条电路板的另一侧长边方向延伸的第二嵌入部，在散热部上位于第二嵌入部处设有填满第二嵌入部的延伸部。
  16. 根据权利要求11所述的用于背光组件的LED灯条，其中：所述灯条电路板为FPC软电路板。
  17. 根据权利要求16所述的用于背光组件的LED灯条，其中：所述LED灯珠与延伸部之间的位置处设有硅胶层。
  18. 根据权利要求17所述的用于背光组件的LED灯条，其中：所述第二嵌入部设于每个LED灯珠对应的两个LED焊盘之间。
  19. 根据权利要求18所述的用于背光组件的LED灯条，其中：所述散热部与延伸部为石墨片或导热金属片。
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