WO2015070487A1 - 背光模组及用该背光模组的液晶显示模组 - Google Patents

背光模组及用该背光模组的液晶显示模组 Download PDF

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Publication number
WO2015070487A1
WO2015070487A1 PCT/CN2013/088100 CN2013088100W WO2015070487A1 WO 2015070487 A1 WO2015070487 A1 WO 2015070487A1 CN 2013088100 W CN2013088100 W CN 2013088100W WO 2015070487 A1 WO2015070487 A1 WO 2015070487A1
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WIPO (PCT)
Prior art keywords
substrate
circuit board
liquid crystal
light guide
crystal display
Prior art date
Application number
PCT/CN2013/088100
Other languages
English (en)
French (fr)
Inventor
俞刚
陈仕祥
Original Assignee
深圳市华星光电技术有限公司
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Filing date
Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to KR1020167008561A priority Critical patent/KR101777527B1/ko
Priority to GB1600115.8A priority patent/GB2529988B/en
Priority to US14/129,983 priority patent/US9158059B2/en
Priority to JP2016528815A priority patent/JP6157738B2/ja
Publication of WO2015070487A1 publication Critical patent/WO2015070487A1/zh

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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136222—Colour filters incorporated in the active matrix substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/64—Heat extraction or cooling elements
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/34—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 reflector

Definitions

  • Liquid crystal display module Liquid crystal display module
  • Liquid Crystal Display has many advantages, such as mobile phone, personal digital assistant (PDA), digital camera, computer screen or laptop screen. Wait.
  • liquid crystal display devices which include a casing, a liquid crystal panel disposed in the casing, and a backlight module disposed in the casing.
  • the structure of a conventional liquid crystal panel is composed of a color filter substrate (Color Filter), a thin film transistor Array Substrate (TFT Array Substrate), and a substrate disposed between the two substrates.
  • the liquid crystal layer is composed of a liquid crystal layer.
  • the working principle is to control the rotation of the liquid crystal molecules of the liquid crystal layer by applying a driving voltage on the two glass substrates, and refract the light of the backlight module to produce a picture whh Since the liquid crystal panel itself is not
  • the light source needs to be normally displayed by the light source provided by the backlight module. Therefore, the backlight module becomes one of the key components of the liquid crystal display device.
  • the backlight module is divided into a side-in type backlight module and a direct-type backlight module according to different incident positions of the light source.
  • the direct-lit backlight module is provided with a light source such as a cathode fluorescent lamp (CCFL) or a light emitting diode (LED) disposed behind the liquid crystal panel to directly form a surface light source for the liquid crystal panel.
  • CCFL cathode fluorescent lamp
  • LED light emitting diode
  • the side-lit backlight module has a backlight LED strip (Light bar) disposed at the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip is from the light guide plate (LGP) side.
  • the smooth surface enters the light guide plate, is reflected and diffused, and is emitted from the light exit surface of the light guide plate, and then passes through the optical film group to form a surface light source to be supplied to the liquid crystal panel.
  • the flip-in backlight module includes: a back sheet 100 , a reflective sheet 200 disposed in the back sheet 100 , a light guide plate 300 disposed on the reflective sheet 200 , and a backlight 400 disposed in the back sheet 100 . And a heat sink 500 disposed between the backlight 400 and the back plate 100.
  • the backplane 100 includes a bottom plate 102 and a side plate 104 connected to the bottom plate 102.
  • the backlight 400 is mounted on the heat sink 500 by a heat sink (not shown).
  • the heat sink 500 is generally an aluminum plate, a copper plate or a graphite patch.
  • the screws are fixed on the bottom plate 102 of the backboard 100, and the heat generated by the backlight 400 is transmitted to the bottom plate 102 of the backboard 100 through the heat sink 500, and the heat is exchanged with the outside air through the backplane 100. Change the heat.
  • the thermal conductivity of the thermal adhesive is not high, the heat dissipation effect of the backlight module is not good, which affects the quality of the backlight module.
  • a side-entry backlight module which directly prints the LED package on the substrate of the flat plate, and its structure is shown in FIG. 2, and the LED package is vertically mounted.
  • the component is disposed on the PCB substrate 700, so that the outer edge frame of the upper frame of the liquid crystal display can be set to a narrower frame.
  • a heat dissipation plate 900 is disposed under the PCB substrate 700 to dissipate heat generated by the PCB module in time to ensure the quality of the liquid crystal panel to display a clear pattern.
  • the object of the present invention is to provide a backlight module which is thin in thickness, is advantageous for narrow frame, and has good heat dissipation effect.
  • Another object of the present invention is to provide a liquid crystal display module which has a thin thickness, a narrow frame, a good heat dissipation effect, and high quality.
  • the present invention provides a backlight module, including: a backplane, a backlight mounted in the backplane, and a light guide panel mounted in the backplane, the backplane including a bottom panel and a number vertically connected to the backplane a side panel, the backlight includes a circuit board and a plurality of LED lamps mounted and electrically connected to the circuit board, the circuit board is mounted on the bottom plate, and the LED lamp is located at one side of the light guide plate,
  • the surface of the circuit board facing the bottom plate has a first surface
  • a heat sink is disposed between the circuit board and the bottom plate
  • the heat sink has a second surface matching the first inclined surface, the first inclined surface and the second inclined surface
  • the printed circuit board and the heat sink are combined to form a flat structure, and the light guide plate is supported on the flat structure.
  • the heat sink is made of aluminum.
  • the invention also includes a reflective sheet disposed between the bottom plate and the light guide plate and an optical film set disposed above the light guide plate.
  • the light guide plate includes a bottom surface facing the bottom plate, a top surface disposed opposite to the bottom surface, and a plurality of side surfaces disposed between the bottom surface and the top surface, wherein the plurality of side surfaces include at least one light incident surface, and the LED light is disposed at the Described on the glossy side.
  • the present invention further provides a liquid crystal display module, comprising: a backlight module, a plastic frame disposed on the backlight module, and a liquid crystal display panel disposed on the plastic frame, the backlight module comprising: a back plate and being mounted on the back a backlight inside the board and a light guide plate installed in the back board, the back board includes a bottom board and a vertical connection
  • the backlight includes a circuit board and a plurality of LED lamps mounted and electrically connected to the circuit board, the circuit board is mounted on the bottom plate, and the LED lamp is located at one of the light guide plates.
  • the heat sink is made of aluminum. Square optical film set.
  • the light guide plate includes a bottom surface facing the bottom plate, a top surface disposed opposite to the bottom surface, and a plurality of inverted surfaces disposed between the bottom surface and the top surface, wherein the plurality of side surfaces include at least one light incident surface.
  • the LED lamp is disposed on the side of the light incident surface.
  • the liquid crystal display panel includes a TFT substrate, a CF substrate disposed opposite to the TFT substrate, and a liquid crystal layer disposed between the TFT substrate and the CF substrate.
  • the TFT substrate includes a first substrate, a thin film transistor formed on one side of the first substrate, and a first polarizer formed on the other side of the first substrate;
  • the CF substrate includes a second substrate and is formed on one side of the second substrate a color filter and a second polarizer formed on the other side of the second substrate.
  • the present invention further provides a liquid crystal display module, comprising: a backlight module, a plastic frame disposed on the backlight module, and a liquid crystal display panel disposed on the plastic frame, the backlight module comprising: a back plate and being mounted on the back a backlight in the board and a light guide plate mounted in the back board, the back board includes a bottom board and a plurality of side boards vertically connected to the bottom board, wherein the backlight comprises a circuit board and the number of the board mounted and electrically connected to the circuit board
  • the LED board is mounted on the bottom plate, the LED lamp is located at one side of the light guide plate, the circuit board has a first inclined surface facing the bottom plate, and a heat sink is disposed between the circuit board and the bottom plate
  • the heat sink has a second inclined surface that cooperates with the first inclined surface, and the first inclined surface and the second inclined surface are attached together, so that the circuit board and the heat sink form a flat structure, and the light guide plate supports On the flat structure;
  • the heat sink is made of aluminum.
  • the light guide plate includes a bottom surface facing the bottom plate, a top surface disposed opposite to the bottom surface, and a plurality of side surfaces disposed between the bottom surface and the top surface, wherein the plurality of side surfaces include at least one light incident surface, and the LED light is disposed on The entrance is on the glossy side.
  • the liquid crystal display panel includes a TFT substrate, a CF substrate that is disposed to face the TFT substrate, and a liquid crystal layer that is disposed between the TFT substrate and the CF substrate.
  • the TFT substrate includes a first substrate, a thin film transistor formed on one side of the first substrate, and a first polarizer formed on the other side of the first substrate;
  • the CF substrate includes a second substrate and is formed on the second substrate. a color filter on one side and a second polarizer formed on the other side of the second substrate.
  • the invention has the following advantages: the backlight module of the present invention and the liquid crystal display module using the backlight module, wherein the first inclined surface is disposed on the circuit board of the backlight, and the first inclined surface is matched on the heat dissipation sheet. a second inclined surface, the first and second inclined surfaces are matched to each other, so that the circuit board and the heat sink form a flat structure, and the light guide plate is directly supported on the flat structure, thereby reducing the overall thickness of the backlight module and increasing
  • the contact area between the circuit board and the heat sink effectively improves the heat dissipation effect; and since the circuit board is mounted on the bottom plate of the back plate, the spacing between the light guide plate and the side plate of the back plate can be effectively reduced, thereby facilitating the narrow frame.
  • FIG. 1 is a schematic structural view of a conventional backlight module
  • FIG. 2 is a schematic structural view of another conventional backlight module
  • FIG. 3 is a schematic structural view of a backlight module of the present invention.
  • FIG. 4 is a schematic structural view of a liquid crystal display module of the present invention.
  • FIG. 5 is a schematic structural view of the liquid crystal display panel of FIG. 4.
  • the present invention provides a backlight module, including: a back plate 2 , a backlight 4 mounted in the back plate 2 , and a light guide plate 6 mounted in the back plate 2 .
  • the back plate 2 includes a bottom plate 22 .
  • the backlight 4 includes a circuit board, 42 and a plurality of LED lamps 44 mounted and electrically connected to the circuit board 42, the circuit board 42 being mounted on the bottom plate 22, the LED lamp 44 is located at one side of the light guide plate 6.
  • the circuit board 42 has a first slope 422 facing the surface of the bottom plate 22, and a heat sink 8 is disposed between the circuit board 42 and the bottom plate 22, the heat sink 8 has a second inclined surface 82 that cooperates with the first inclined surface 422, and the first inclined surface 422 and The second inclined surface 82 is bonded together, so that the circuit board 42 and the heat sink 8 form a flat structure, and the light guide plate 6 is supported on the flat structure foi while reducing the overall thickness of the backlight module, increasing The contact area of the circuit board 42 and the heat sink 8 effectively improves the heat dissipation effect.
  • the heat sink 8 is made of aluminum with better heat conduction effect, further increasing the heat dissipation effect, and improving the backlight mode. Group quality.
  • the light guide plate 6 includes a bottom surface 62 facing the bottom plate 22, a top surface 64 disposed opposite the bottom surface 62, and a plurality of side surfaces disposed between the bottom surface 62 and the top surface 64.
  • the plurality of side surfaces include at least one light incident surface 66.
  • the LED lamp 44 is disposed on the side of the light incident surface 66 to form a side-entry backlight module.
  • the circuit board 42 is mounted on the bottom plate 22 of the backboard 2
  • the spacing between the light guide plate 6 and the side plate 24 of the back plate 2 is effectively reduced, which facilitates narrow frame formation.
  • the backlight module of the present invention further includes a reflective sheet 9 disposed between the bottom plate 22 and the light guide plate 6 and an optical film set 10 above the light guide plate 6.
  • the reflective sheet 9 is used.
  • the light emitted by the backlight 4 is reflected to enhance the illumination intensity of the backlight module.
  • the optical film set 10 is used to homogenize the light emitted by the light guide plate 6 to improve the quality of the backlight module.
  • the present invention further provides a liquid crystal display module, including: a backlight module, a plastic frame 20 disposed on the backlight module, and a liquid crystal display disposed on the plastic frame 20 Panel 40.
  • the backlight module includes: a back plate 2, a backlight 4 mounted in the back plate 2, and a light guide plate 6 mounted in the back plate 2.
  • the back plate 2 includes a bottom plate 22 and a plurality of vertically connected to the bottom plate 22.
  • the side plate 24 includes a circuit board 42 and a plurality of LED lamps 44 mounted and electrically connected to the circuit board 42.
  • the circuit board 42 is mounted on the bottom plate 22, and the LED lamp 44 is located at the guide.
  • One side of the light board 6 has a first inclined surface 422 facing the surface of the bottom plate 22, and a heat sink 8 is disposed between the circuit board 42 and the bottom plate 22.
  • the heat sink 8 has a matching with the first inclined surface 422.
  • the second inclined surface 82, the first inclined surface 422 and the second inclined surface 82 are attached together, so that the circuit board 42 and the heat sink 8 form a flat structure, and the light guide plate 6 is supported on the flat structure. .
  • the heat sink 8 is made of aluminum with better heat conduction effect. Into, further increase the heat dissipation effect and improve the quality of the backlight module.
  • the light guide plate 6 includes a bottom surface 62 facing the bottom plate 22, a top surface 64 disposed opposite the bottom surface 62, and a plurality of side surfaces disposed between the bottom surface 62 and the top surface 64.
  • the plurality of side surfaces include at least one light incident surface 66.
  • the LED lamp 44 is disposed on the side of the light incident surface 66 to form a side-entry backlight module.
  • the circuit board 42 is mounted on the bottom plate 22 of the backboard 2 In the above, the spacing between the light guide plate 6 and the side plate 24 of the back plate 2 can be effectively reduced, which is advantageous for achieving a narrow frame.
  • the liquid crystal display panel 40 includes a TFT substrate 402, a CF substrate 404 disposed opposite to the TFT substrate 402, and a liquid crystal layer 406 disposed between the TFT substrate 402 and the CF substrate 404.
  • the TFT substrate 402 is used to drive liquid crystal molecules in the liquid crystal layer 406 to be deflected to achieve light selection, and the CF substrate 404 is used for color display.
  • the TFT substrate 402 includes a first substrate 421, a thin film transistor 423 formed on the side of the first substrate 421, and a first polarizer 425 formed on the other side of the first substrate 421;
  • the CF substrate 404 includes The second substrate 441, the color filter 443 formed on the second substrate 441 side, and the second polarizer 445 formed on the other side of the second substrate 441.
  • the backlight module of the present invention further includes a reflective sheet 9 disposed between the bottom plate 22 and the light guide plate 6 and an optical film set 10 disposed above the light guide plate 6.
  • the reflective sheet 9 is used for reflection.
  • the light emitted by the backlight 4 enhances the illumination intensity of the backlight module, and the optical film group 10 is used to homogenize the light emitted by the light guide plate 6 to improve the quality of the backlight module.
  • the backlight module of the present invention and the liquid crystal display module using the same have a first inclined surface disposed on a circuit board of the backlight, and a second matching surface with the first inclined surface is disposed on the heat sink
  • the bevel, the first and second bevels are attached to each other, so that the circuit board and the heat sink form a flat structure, and the light guide plate is directly supported on the flat structure, and the circuit board is enlarged while reducing the overall thickness of the backlight module.
  • the contact area with the heat sink can effectively improve the heat dissipation effect; and since the circuit board is mounted on the bottom plate of the back plate, the spacing between the light guide plate and the side plate of the back plate can be effectively reduced, thereby facilitating the narrow frame.

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

提供了一种背光模组及用背光模组的液晶显示模组，背光模组，包括：背板（2）、安装于背板（2）内的背光源（4）及安装于背板（2）内的导光板（6），背板（2）包括底板（22）及垂直连接于底板（22）的数个侧板（24），背光源（4）包括电路板（42）及安装并电性连接于电路板（42）的数个LED灯（44），电路板（42）安装于底板（22）上，LED灯（44）位于导光板（6）的一侧，电路板（42）朝向底板（22）的表面具有第一斜面（422），一散热片（8）设于电路板（42）与底板（22）之间，散热片（8）具有一与第一斜面（422）相配合的第二斜面（82）。

Description

液晶显示模组 ;
液晶显示装置 ( Liquid Crystal Display, LCD )具有机身薄、 省电、 无 辐射等众多优点， 得到了广泛的应用， 如移动电话、 个人数字助理 ( PDA ) 、 数字相机、 计算机屏幕或笔记本电脑屏幕等。
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， 其包括壳 体、 设于壳体内的液晶面板及设于壳体内的背光模组 （ Backlight module ) 。 传统的液晶面板的结构是由一彩色滤光片基板 （ Color Filter ) ■' 一— 月莫晶 4 ' 「车歹 基 ( Thin Film Transistor Array Substrate , TFT Array Substrate ) 以及一配置于两基板间的液晶层 ( Liquid Crystal Layer )所构成， 其工作原理是通过在两片玻璃基板上施加驱动电压来控制 液晶层的液晶分子的旋转， 将背光模组的光线折射出来产生画面„ 由于液 晶面板本身不发光， 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 位置的不同分成側入式背光模组与直下式背光模组两种。 直下式背光模组 是将发光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)设置在液晶面板后方， 直接形成 面光源提供给液晶面板。 而侧入式背光模组是将背光源 LED 灯条（Light bar )设于液晶面板侧后方的背板边缘处， LED 灯条发出的光线从导光板 ( Light Guide Plate , LGP )—侧的入光面进入导光板， 经反射和扩散后从 导光板出光面射出， 再经由光学膜片组， 以形成面光源提供给液晶面板。
请参阅图 1 , 倒入式背光模组包括： 背板 100、 设置于背板 100 内的 反射片 200、 设置于反射片 200上的导光板 300、 设置于背板 100 内的背 光源 400、 及设于背光源 400与背板 100之间的散热片 500。 背板 100包 括底板 102及连接于底板 102的侧板 104， 背光源 400通过散热胶 (未图 示） 安装于散热片 500上， 散热片 500—般为铝板、 铜板或石墨贴片， 其 通过螺钉固定于背板 100的底板 102上， 背光源 400发出的热量通过散热 片 500传递至背板 100的底板 102 , 通过背板 100与外界的空气进行热交 换散热。 然而， 由于散热胶的导热系数不高， 进而导致背光模组的散热效 果并不良好， 影响背光模组的品质。
为了解决上述问题， 及实现平面显示装置的窄边框化， 现有一种侧入 式背光模组， 其将 LED封装直接打件于平板的基板上， 其结构如图 2 所 示， LED封装垂直打件于 PCB基板 700上， 从而可将液晶显示器的上框 的外缘边框设置成较窄的边框。 另外， PCB基板 700下方还设置有散热板 900, 以将 PCB模块产生的热量及时的散发出去， 从而保证液晶面板显示 清晰图案的品质。
然而， 在 PCB基板 700下方设置散热板 900无疑是进一步的增加了液 晶显示器的整体厚度， 与液晶显示器向薄型化发展的趋势是相违背的， 因 此， 有必要对此进行改进。
' 本发明的目的在于提供一种背光模组， 厚度薄， 利于窄边框化， 且散 热效果较好。
本发明的另一目的在于提供一种液晶显示模组， 其厚度薄， 边框窄， 散热效果好， 且具有较高的品质。
为实现上述目的， 本发明提供一种背光模组， 包括： 背板、 安装于背 板内的背光源及安装于背板内的导光板， 所述背板包括底板及垂直连接于 底板的数个侧板， 所述背光源包括电路板及安装并电性连接于电路板的数 个 LED灯， 所述电路板安装于所述底板上， 所述 LED灯位于导光板的一 侧， 所述电路板朝向底板的表面具有第一钭面， 一散热片设于电路板与底 板之间， 该散热片具有一与第一斜面相配合的第二钭面， 所述第一斜面与 第二斜面贴合在一起， 使得所述电路板与散热片组成一平板状结构， 所述 导光板支撑于该平板状结构上。
所述散热片由铝制成。
还包括设于底板与导光板之间的反射片及设于导光板上方的光学膜片 组。
所述导光板包括朝向底板的底面， 与底面相对设置的顶面及设于底面 与顶面之间的数个側面， 该数个側面中包括至少一个入光面, 所述 LED 灯设于所述入光面侧。
本发明还提供一种液晶显示模组， 包括： 背光模组、 设于背光模组上 的胶框及设于胶框上的液晶显示面板， 所述背光模组包括： 背板、 安装于 背板内的背光源及安装于背板内的导光板， 所述背板包括底板及垂直连接 于底板的数个侧板， 所述背光源包括电路板及安装并电性连接于电路板的 数个 LED灯， 所述电路板安装于所述底板上， 所述 LED灯位于导光板的 一侧， 所述电路板朝向底板的表面具有第一斜面， 一散热片设于电路板与 底板之间， 该散热片具有一与第一斜面相配合的第二斜面， 所述第一斜面 与第二斜面贴合在一起， 使得所述电路板与散热片组成一平板状结构， 所 述导光板支撑于该平板状结构上。
所述散热片由铝制成。 方的光学膜片组。 " ' . ' ― 所述导光板包括朝向底板的底面、 与底面相对设置的顶面及设于底面 与顶面之间的数个倒面， 该数个侧面中包括至少一个入光面， 所述 LED 灯设于所述入光面侧。
所述液晶显示面板包括 TFT基板、 与 TFT基板相对贴合设置的 CF基 板及设于 TFT基板与 CF基板之间的液晶层。
所述 TFT基板包括第一基板、 形成于第一基板一侧的薄膜晶体管及形 成于第一基板另一側的第一偏光片； 所述 CF基板包括第二基板、 形成于 第二基板一侧的彩膜滤光片及形成于第二基板另一侧的第二偏光片。
本发明还提供一种液晶显示模组， 包括： 背光模组、 设于背光模组上 的胶框及设于胶框上的液晶显示面板， 所述背光模组包括： 背板、 安装于 背板内的背光源及安装于背板内的导光板， 所述背板包括底板及垂直连接 于底板的数个侧板， 所述背光源包括电路板及安装并电性连接于电路板的 数个 LED灯， 所述电路板安装于所述底板上， 所述 LED灯位于导光板的 一侧， 所述电路板朝向底板的表面具有第一斜面， 一散热片设于电路板与 底板之间， 该散热片具有一与第一斜面相配合的第二斜面， 所述第一斜面 与第二斜面贴合在一起， 使得所述电路板与散热片组成一平板状结构， 所 述导光板支撑于该平板状结构上；
其中， 所述散热片由铝制成。 方的光学膜片 ^组。 Γ ' ' '
所述导光板包括朝向底板的底面、 与底面相对设置的顶面及设于底面 与顶面之间的数个侧面， 该数个侧面中包括至少一个入光面， 所述 LED 灯设.于所述入.光面側。
所述液晶显示面板包括 TFT基板、 与 TFT基板相对贴合设置的 CF基 板及设于 TFT基板与 CF基板之间的液晶层。 所述 TFT基板包括第一基板、 形成于第一基板一侧的薄膜晶体管及形 成于第一基板另一側的第一偏光片； 所述 CF基板包括第二基板、 形成于 第二基.板一侧的彩膜滤光片及形成于第二基板另一侧的第二偏光片。
本发明的有益效杲： 本发明的背光模组及用该背光模组的液晶显示模 组， 通过在背光源的电路板上设置第一斜面， 并在散热片上设置与第一斜 面相配合的第二斜面， 该第一与第二斜面相贴合， 使得电路板与散热片组 成一平板状结构， 导光板直接支撑于该平板状结构上， 在降低背光模组整 体厚度的同时， 增大电路板与散热片的接触面积， 有效提高散热效果； 且 由于电路板安装于背板的底板上， 能有效减小导光板与背板侧板之间的间 距， 利于实现窄边框化。
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。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其它有益效果显而易见。
附图中，
图 1为现有的一种背光模组的结构示意图；
图 2为现有的另一种背光模组的结构示意图；
图 3为本发明背光模组的结构示意图；
图 4为本发明液晶显示模组的结构示意图；
图 5为图 4中液晶显示面板的结构示意图。
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 3 , 本发明提供一种背光模组， 包括： 背板 2、 安装于背板 2 内的背光源 4及安装于背板 2内的导光板 6， 所述背板 2包括底板 22及垂 直连接于底板 22的数个侧板 24, 所述背光源 4包括电路板. 42及安装并电 性连接于电路板 42的数个 LED灯 44 , 所述电路板 42安装于所述底板 22 上， 所述 LED灯 44位于导光板 6的一侧， 所述电路板 42朝向底板 22的 表面具有第一斜面 422， 一散热片 8设于电路板 42与底板 22之间， 该散 热片 8具有一与第一斜面 422相配合的第二斜面 82 , 所述第一斜面 422与 第二斜面 82贴合在一起， 使得所述电路板 42与散热片 8组成一平板状结 构， 所述导光板 6支撑于该平板状结构上„ 在降低背光模组整体厚度的同 时， 增大电路板 42 与散热片 8 的接触面积， 有效提高散热效果， 进一步 地， 在本实施例中， 所述散热片 8 由导热效杲较好的铝制成， 进一步增加 散热效杲， 提升背光模组品质。
所述导光板 6包括朝向底板 22的底面 62、 与底面 62相对设置的顶面 64及设于底面 62与顶面 64之间的数个侧面， 该数个侧面中包括至少一个 入光面 66， 所述 LED灯 44设于所述入光面 66侧， 进而组成侧入式背光 模组， 在本侧入式背光模组中， 由于电路板 42 安装于背板 2 的底板 22 上， 能有效减小导光板 6与背板 2侧板 24之间的间距， 利于实现窄边框 化。
值得一提的是， 本发明的背光模组还包括设于底板 22 与导光板 6之 间的反射片 9及; ί殳于导光板 6上方的光学膜片组 10, 所述反射片 9用于反 射背光源 4发射的光线， 以增强背光模组的光照强度， 光学膜片组 10用 于均匀化由导光板 6射出的光线， 提升背光模组的品质。
请参阅图 4及图 5， 并参考图 3 , 本发明还提供一种液晶显示模组， 包括： 背光模组、 设于背光模组上的胶框 20及设于胶框 20上的液晶显示 面板 40。
所述背光模组包括： 背板 2、 安装于背板 2 内的背光源 4及安装于背 板 2内的导光板 6, 所述背板 2包括底板 22及垂直连接于底板 22的数个 侧板 24， 所述背光源 4包括电路板 42及安装并电性连接于电路板 42的数 个 LED灯 44, 所述电路板 42安装于所述底板 22上， 所述 LED灯 44位 于导光板 6 的一側， 所述电路板 42 朝向底板 22 的表面具有第一斜面 422, 一散热片 8设于电路板 42与底板 22之间, 该散热片 8具有一与第 一斜面 422相配合的第二斜面 82, 所述第一斜面 422与第二斜面 82贴合 在一起， 使得所述电路板 42与散热片 8组成一平板状结构， 所述导光板 6 支撑于该平板状结构上。 在降低背光模组整体厚度的同时， 增大电路板 42 与散热片 8 的接触面积， 有效提高散热效果， 进一步地， 在本实施例中， 所述散热片 8 由导热效果较好的铝制成， 进一步增加散热效果， 提升背光 模组品质。
所述导光板 6包括朝向底板 22的底面 62、 与底面 62相对设置的顶面 64及设于底面 62与顶面 64之间的数个侧面， 该数个侧面中包括至少一个 入光面 66, 所述 LED灯 44设于所述入光面 66侧， 进而组成侧入式背光 模组， 在本侧入式背光模组中， 由于电路板 42 安装于背板 2 的底板 22 上， 能有效减小导光板 6与背板 2侧板 24之间的间距， 利于实现窄边框 化。
请参阅图 5， 所述液晶显示面板 40包括 TFT基板 402、 与 TFT基板 402相对贴合设置的 CF基板 404及设于 TFT基板 402与 CF基板 404之 间的液晶层 406。 所述 TFT基板 402用于驱动液晶层 406中的液晶分子偏 转， 以实现对光线的选择， CF基板 404用于实现彩色显示。
进一步地， 所述 TFT基板 402 包括第一基板 421、 形成于第一基板 421 —侧的薄膜晶体管 423 及形成于第一基板 421 另一侧的第一偏光片 425; 所述 CF基板 404包括第二基板 441、 形成于第二基板 441一侧的彩 膜滤光片 443及形成于第二基板 441另一側的第二偏光片 445。
值得一提的是， 本发明的背光模组还包括设于底板 22 与导光板 6之 间的反射片 9及设于导光板 6上方的光学膜片组 10, 所述反射片 9用于反 射背光源 4发射的光线， 以增强背光模组的光照强度， 光学膜片组 10 用 于均匀化由导光板 6射出的光线， 提升背光模组的品质。
综上所述， 本发明的背光模组及用该背光模组的液晶显示模组， 通过 在背光源的电路板上设置第一斜面， 并在散热片上设置与第一斜面相配合 的第二斜面， 该第一与第二斜面相贴合， 使得电路板与散热片组成一平板 状结构， 导光板直接支撑于该平板状结构上， 在降低背光模组整体厚度的 同时， 增大电路板与散热片的接触面积， 有效提高散热效杲； 且由于电路 板安装于背板的底板上， 能有效减小导光板与背板侧板之闾的间距， 利于 实现窄边框化。
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

一种背光模组， 包括： 背板、 安装于背板内的背光源及安装于背 板内的导光板， 所述背板包括底板及垂直连接于底板的数个侧板， 所述背 光源包括电路板及安装并电性连接于电路板的数个 LED 灯， 所述电路板 安装于所述底板上， 所述 LED 灯位于导光板的一侧， 所述电路板朝向底 板的表面具有第一斜面， 一散热片设于电路板与底板之间， 该散热片具有 一与第一斜面相配合的第二斜面， 所述第一斜面与第二斜面贴合在一起 , 使得所述电路板与散热片组成一平板状结构， 所述导光板支撑于该平板状 结构上。
2、 如权利要求 i所述的背光模组， 其中， 所述散热片由铝制成。
3、 如权利要求 1 所述的背光模组， 还包括设于底板与导光板之间的 反射片及设于导光板上方的光学膜片组。
4、 如权利要求 1 所述的背光模组， 其中， 所述导光板包括朝向底板 的底面、 与底面相对设置的顶面及设于底面与顶面之间的数个倒面， 该数 个侧面中包括至少一个入光面， 所述 LED灯设于所述入光面倒。
5、 一种液晶显示模组， 包括： 背光模组、 设于背光模组上的胶框及 设于胶框上的液晶显示面板， 所述背光模组包括： 背板、 安装于背板内的 背光源及安装于背板内的导光板， 所述背板包括底板及垂直连接于底板的 数个侧板， 所述背光源包括电路板及安装并电性连接于电路板的数个 LED 灯， 所述电路板安装于所述底板上， 所述 LED 灯位于导光板的一侧， 所 述电路板朝向底板的表面具有第一钭面， 一散热片设于电路板与底板之 间， 该散热片具有一与第一斜面相配合的第二斜面， 所述第一斜面与第二 斜面贴合在一起， 使得所述电路板与散热片组成一平板状结构， 所述导光 板支撑于该平板状结构上。
6、 如权利要求 5 所述的液晶显示模组， 其中， 所述散热片由铝制 成。
7、 如权利要求 5 所述的液晶显示模组， 其中， 所述背光模组还包括
8、 如权利要求 5 所述的液晶显示模组， 其中， 所述导光板包括朝向 底板的底面、 与底面相对设置的顶面及设于底面与顶面之闾的数个侧面， 该数个侧面中包括至少一个入光面， 所述 LED灯设于所述入光面侧。
9、 如权利要求 5 所述的液晶显示模组， 其中， 所述液晶显示面板包 括 TFT基板、 与 TFT基板相对贴合设置的 CF基板及.设于 TFT基板与 CF 基板之间的液晶层。
10、 如权利要求 9所述的液晶显示模组， 其中， 所述 TTT基板包括第 一基板、 形成于第一基板一侧的薄膜晶体管及形成于第一基板另一侧的第 一偏光片； 所述 CF基板包括第二基板、 形成于第二基板一側的彩膜滤光 片及形成于第二基板另一倒的第二偏光片。
11、 一种液晶显示模组， 包括： 背光模组、 设于背光模组上的胶框及 设于胶框上的液晶显示面板， 所述背光模组包括： 背板、 安装于背板内的 背光源及安装于背板内的导光板， 所述背板包括底板及垂直连接于底板的 数个侧板， 所述背光源包括电路板及安装并电性连接于电路板的数个 LED 灯， 所述电路板安装于所述底板上， 所述 LED 灯位于导光板的一侧， 所 述电路板朝向底板的表面具有第一斜面， 一散热片设于电路板与底板之 间， 该散热片具有一与第一斜面相配合的第二斜面， 所述第一斜面与第二 斜面贴合在一起， 使得所述电路板与散热片组成一平板状结构, 所述导光 板支撑于该平板状结构上；
其中， 所述散热片由铝制成。
12、 如权利要求 11 所述的液晶显示模组， 其中， 所述背光模组还包 括设于底板与导光板之间的反射片及设于导光板上方的光学膜片组。
13、 如权利要求 11 所述的液晶显示模组， 其中， 所述导光板包括朝 向底板的底面、 与底面相对设置的顶面及设于底面与顶面之间的数个侧 面， 该数个侧面中包括至少一个入光面， 所述 LED 灯设于所述入光面 侧。
14、 如权利要求 11 所述的液晶显示模组， 其中， 所述液晶显示面板 包括 TFT基板、 与 TFT基板相对贴合设置的 CF基板及设于 TFT基板与 CF基板之间的液晶层。
15、 如权利要求 14所述的液晶显示模组， 其中， 所述 TFT基板包括 第一基板、 形成于第一基板一侧的薄膜晶体管及形成于第一基板另一侧的 第一偏光片； 所述 CF基板包括第二基板 形成于第二基板一侧的彩膜滤 光片及形成于第二基板另一侧的第二偏光片。
PCT/CN2013/088100 2013-11-15 2013-11-29 背光模组及用该背光模组的液晶显示模组 WO2015070487A1 (zh)

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