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WO2017148017A1 - 一种背光模组及液晶显示器 - Google Patents

一种背光模组及液晶显示器 Download PDF

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Publication number
WO2017148017A1
WO2017148017A1 PCT/CN2016/082949 CN2016082949W WO2017148017A1 WO 2017148017 A1 WO2017148017 A1 WO 2017148017A1 CN 2016082949 W CN2016082949 W CN 2016082949W WO 2017148017 A1 WO2017148017 A1 WO 2017148017A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical film
film group
sheet
guide plate
backlight module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/082949
Other languages
English (en)
French (fr)
Inventor
曾杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US15/307,266 priority Critical patent/US9971086B2/en
Publication of WO2017148017A1 publication Critical patent/WO2017148017A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • 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
    • G02B6/0081—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
    • G02B6/009—Positioning aspects of the light source 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
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • 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
    • G02F1/133615—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
    • G02B6/005—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
    • 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
    • G02F1/133606—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
    • G02F1/133602—Direct backlight
    • G02F1/133612—Electrical details

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a backlight module and a liquid crystal display.
  • Liquid crystal display devices are widely used in various electronic products. As the demand for narrow frames of electronic products increases, the narrow frame design of backlight modules, which is an important component of liquid crystal display devices, has gradually become a trend.
  • the structure of the backlight module on the market is as shown in FIG. 1 .
  • the figure shows the structure of the existing backlight module, which includes a plastic frame 11 , an LED light source 12 , a flexible circuit board ( FPC ) 13 , a light guide plate 14 , and optical The diaphragm group 15, the reflection sheet 16, and the double-sided tape 17.
  • FPC flexible circuit board
  • the plastic frame 11 Since the plastic frame 11 itself has a certain thickness, it must increase the width of the frame of the backlight module, so that the width of the entire liquid crystal display device is also increased, thereby failing to meet the market demand for a narrow bezel; in addition, in the existing backlight module The plastic frame is provided, so that the structure of the entire backlight module is more complicated, the manufacturing cost is also improved, and the light exposed on the side surface of the light guide plate 14 cannot be reflected back to the light guide plate, resulting in a problem of low light utilization efficiency.
  • a backlight module with a narrow frame which not only can reduce the frame width of the backlight module, but also meet the market demand for a narrow frame, and can also simplify the structure of the backlight module and reduce the cost.
  • the light exposed on the side of the light guide plate is reflected back to the light guide plate, thereby improving the utilization of light.
  • the embodiment of the present invention provides a backlight module to solve the problem that the border of the backlight module is too wide.
  • the embodiment of the present invention further provides a liquid crystal display to solve the problem in the prior art because the border of the liquid crystal display is too wide. With the same screen size, the picture that is viewed is smaller.
  • Embodiments of the present invention provide a liquid crystal display including a backlight module, the backlight module including: an LED light source, a flexible circuit board, a light guide plate, an optical film set, and a reflective sheet, wherein the optical film set includes An optical film set and a second optical film set, wherein
  • the reflective sheet is composed of a bottom surface and four side surfaces, and the bottom surface and the four side surfaces enclose a square box;
  • the LED light source is placed on a bottom surface of the reflective sheet, and three sides of the non-light-emitting side of the LED light source are respectively in contact with three sides of the reflective sheet;
  • the light guide plate is disposed on a bottom surface of the reflective sheet, the light incident side of the light guide plate is opposite to the light exit side of the LED light source, and the three sides of the non-light incident side of the light guide plate are opposite to the reflection The three sides of the sheet are in contact;
  • the flexible circuit board is disposed above the LED light source, and is fixed to the inner surface of the first optical film group by double-sided adhesive;
  • the second optical film group is disposed on the light exiting side of the light guide plate, and the three side surfaces of the second optical film group that are not opposite to the flexible circuit board are in contact with the three side surfaces of the reflective sheet ;
  • the first optical film group is composed of a top surface and four side surfaces, the top surface is placed on the flexible circuit board and the second optical film group, and the first optical film group is four
  • the inner surface of the side surface and the outer surface of the four side surfaces of the reflection sheet are fixed by double-sided adhesive bonding.
  • the optical film in the first optical film group is a first prism sheet;
  • the second optical film group includes a second prism sheet and a diffusion sheet, the diffusion sheet Placed between the second prism sheet and the light guide plate.
  • the number of optical films includes at least two.
  • the flexible circuit board includes an external interface portion that is drawn by being grooved on a side surface of the first optical film group.
  • the embodiment of the invention further provides a backlight module, comprising: an LED light source, a flexible circuit board, a light guide plate, an optical film set and a reflective sheet, wherein the optical film set comprises a first optical film set and a second Optical film set;
  • the reflective sheet is composed of a bottom surface and four side surfaces, and the bottom surface and the four side surfaces enclose a square box;
  • the LED light source is placed on a bottom surface of the reflective sheet, and three sides of the non-light-emitting side of the LED light source are respectively in contact with three sides of the reflective sheet;
  • the light guide plate is disposed on a bottom surface of the reflective sheet, the light incident side of the light guide plate is opposite to the light exit side of the LED light source, and the three sides of the non-light incident side of the light guide plate are opposite to the reflection The three sides of the sheet are in contact;
  • the flexible circuit board is disposed above the LED light source and is fixed to the inner surface of the first optical film group;
  • the second optical film group is disposed on the light exiting side of the light guide plate, and the three side surfaces of the second optical film group that are not opposite to the flexible circuit board are in contact with the three side surfaces of the reflective sheet ;
  • the first optical film group is composed of a top surface and four side surfaces, the top surface is placed on the flexible circuit board and the second optical film group, and the first optical film group is four The inner surface of the side surface is fixed to the outer surface of the four side surfaces of the reflection sheet.
  • the fixing and fixing manner includes fixing by double-sided tape or thermosetting glue.
  • the optical film in the first optical film group is a first prism sheet.
  • the number of optical films includes at least two.
  • the second optical film group includes a second prism sheet and a diffusion sheet, and the diffusion sheet is interposed between the second prism sheet and the light guide plate.
  • the flexible circuit board includes an external interface portion, and the external interface portion is drawn by being grooved on a side surface of the first optical film group.
  • the embodiment of the present invention further provides another liquid crystal display, the liquid crystal display includes a backlight module, and the backlight module includes: an LED light source, a flexible circuit board, a light guide plate, an optical film set, and a reflective sheet, wherein The optical film set includes a first optical film set and a second optical film set;
  • the reflective sheet is composed of a bottom surface and four side surfaces, and the bottom surface and the four side surfaces enclose a square box;
  • the LED light source is placed on a bottom surface of the reflective sheet, and three sides of the non-light-emitting side of the LED light source are respectively in contact with three sides of the reflective sheet;
  • the light guide plate is disposed on a bottom surface of the reflective sheet, the light incident side of the light guide plate is opposite to the light exit side of the LED light source, and the three sides of the non-light incident side of the light guide plate are opposite to the reflection The three sides of the sheet are in contact;
  • the flexible circuit board is disposed above the LED light source and is fixed to the inner surface of the first optical film group;
  • the second optical film group is disposed on the light exiting side of the light guide plate, and the three side surfaces of the second optical film group that are not opposite to the flexible circuit board are in contact with the three side surfaces of the reflective sheet ;
  • the first optical film group is composed of a top surface and four side surfaces, the top surface is placed on the flexible circuit board and the second optical film group, and the first optical film group is four The inner surface of the side surface is fixed to the outer surface of the four side surfaces of the reflection sheet.
  • the optical film in the first optical film group in the backlight module is a first prism sheet; and the second optical film group includes a second prism sheet and a diffusion sheet.
  • the diffusion sheet is placed between the second prism sheet and the light guide plate.
  • the number of optical films of the second optical film group in the backlight module includes at least two.
  • the flexible circuit board includes an external interface portion that is drawn by being grooved on a side surface of the first optical film group.
  • the backlight module provided by the embodiment of the present invention fixes the LED light source, the light guide plate and the like in the box by designing the reflection sheet and the first optical film group into a box structure with a top and bottom mosaic.
  • a complete backlight module is formed. Since the backlight module eliminates the plastic frame components in the prior art, the frame of the backlight module is narrowed, the structure of the backlight module is simplified, and the cost is reduced.
  • the side surface of the reflective sheet is in contact with the light guide plate, so that the light exposed from the side surface of the light guide plate is returned to the light guide plate through the reflection of the reflective sheet, thereby improving the utilization of light and enhancing the brightness of the backlight.
  • the embodiment of the invention further provides a liquid crystal display.
  • the frame of the liquid crystal display is narrowed, so that the liquid crystal display provided by the invention has a larger screen and the effect is obtained under the same screen size. It is better to meet the market demand for narrow-border liquid crystal displays.
  • the liquid crystal display has the advantages of low manufacturing cost, high light utilization rate, and high backlight brightness of the liquid crystal display.
  • FIG. 1 is a schematic structural view of a conventional backlight module
  • FIG. 2 is a schematic cross-sectional view of a backlight module of the present invention
  • FIG. 3 is a side cross-sectional view of the light guide plate side of the backlight module of the present invention.
  • FIG. 4 is a schematic view showing the shape of the reflective sheet of the backlight module of the present invention after being unfolded.
  • FIG. 2 is a schematic cross-sectional view of a backlight module of the present invention.
  • a preferred embodiment of the present invention provides a backlight module including: an LED light source 21, a flexible circuit board 22, a light guide plate 23, an optical film set 24, and a reflective sheet 25, wherein the optical film set 24 includes a first optical film Sheet set 241 and second optical film set 242.
  • the reflective sheet 25 is composed of a bottom surface 251 and four side surfaces 252.
  • the bottom surface 251 and the four side surfaces 252 enclose a square box for providing a receiving space for other components of the backlight module.
  • the LED light source 21 is placed on the bottom surface 251 of the reflective sheet 25.
  • the three sides of the non-light-emitting side of the LED light source 21 are respectively in contact with the three side surfaces 252 of the reflective sheet. The purpose of this is to form a square formed by the reflective sheet 25.
  • the box holds the LED light source 21 fixed.
  • the flexible circuit board 22 is disposed above the LED light source 21 and is fixed to the inner surface of the first optical film group 241.
  • the flexible circuit board 13 is fixed on the plastic frame 11 and the light guide plate 14 by the double-sided tape 17 , and the flexible circuit board 13 is exposed on the outer side, in the transportation, packaging, and the backlight module.
  • the flexible circuit board 13 is easily broken, and the flexible circuit board 13 needs to be replaced, which not only wastes materials but also wastes human resources.
  • the flexible circuit board 22 of FIG. 2 is attached to the inner surface of the first optical film group 241, that is, the flexible circuit board 22 is wrapped inside the backlight module to serve as a fixed flexible circuit board. At the same time, the damage of the flexible circuit board 22 is also reduced, and the backlight module of the preferred embodiment is more practical.
  • the light guide plate 23 is placed on the bottom surface 251 of the reflection sheet 25.
  • the light incident side of the light guide plate 23 is opposed to the light exit side of the LED light source 21, and the three side surfaces of the light guide plate 23 on the non-light incident side and the three side surfaces 252 of the reflection sheet are provided. In contact with each other, the purpose of this is to fix the light guide plate 23 by a square box formed by the reflection sheet 25.
  • the second optical film group 242 is disposed on the light exiting side of the light guide plate 23, and the three side surfaces of the second optical film group 242 that are not opposite to the flexible circuit board 22 are in contact with the three side surfaces 252 of the reflective sheet. The side faces 252 of the reflective sheet are in contact to secure the second optical film set 242.
  • the first optical film group 241 is composed of a top surface and four side surfaces, and the top surface of the first optical film group 241 is placed on the flexible circuit board 22 and the second optical film group 242, and the first optical film group
  • the inner surfaces of the four side faces of the 241 are attached and fixed to the outer surfaces of the four side faces 252 of the reflection sheet, and the four side faces of the first optical film group 241 are attached and fixed to the four side faces 252 of the reflection sheet.
  • the LED light source 21, the flexible circuit board 22, the light guide plate 23, and the second optical film group 242 disposed in the reflection sheet 25 are fixed in the upper and lower mosaic box structure composed of the reflection sheet 25 and the first optical film group 241.
  • the side surface 252 of the reflective sheet 25 is placed at the inner surface of the first optical film group 241, that is, the side surface 252 of the reflective sheet 25 is in contact with the light guide plate 23, so that it can be from the side of the light guide plate 23.
  • the leaked light is re-reflected into the light guide plate 23, and the light utilization efficiency of the backlight module is greatly improved.
  • the backlight module of the preferred embodiment since the position of the reflective sheet 25 and the first optical film group 241 is on the side of the backlight module, the backlight module of the preferred embodiment has a bottom portion compared to the prior art. Flattening, so that when the backlight module is attached to the display screen, the backlight module is not easily tilted, the light emitted from the backlight module is more uniform, and at the same time, since the reflective sheet 25 is attached to the side of the first optical film group 241,
  • the side surface of the backlight module includes at least two layers, that is, the side surface 252 of the reflective sheet 25 and the side surface of the first optical film group 241, so that the mechanical rigidity of the backlight module is stronger.
  • the preferred embodiment provides a light guide plate side of the backlight module.
  • FIG. 3 shows the other two sides of each component of FIG. 2, namely, the front and rear sides of the reflection sheet 25, the optical film group 24 and the light guide plate 23, FIG. 3 and FIG.
  • the combination of the backlight module in the preferred embodiment can be easily understood by those skilled in the art.
  • the preferred embodiment provides a schematic view of the shape of the reflective sheet 25 of the backlight module after deployment.
  • the backlight module is assembled.
  • the reflection sheet 25 is bent along the broken line in Fig. 4, so that the four side faces 252 of the reflection sheet 25 are erected and combined with the portion of the bottom surface 251, thereby forming a square box.
  • the shape structure of the first optical film group 241 is similar to that of the reflection sheet 25, and the shape and structure of the first optical film group 241 can be easily known by those skilled in the art according to the contents of the specification. No longer.
  • the flexible circuit board 22 includes an external interface portion for connecting to an external power source to provide a voltage to the backlight module, and the external interface portion passes through the first optical film group 241.
  • the other side of the backlight module can be taken out from the other positions of the backlight module, and is not specifically limited herein.
  • the fixing and fixing manner is fixed by the double-sided adhesive 26, and in other embodiments, the fixing may be performed by thermosetting adhesive bonding, which is not specifically limited herein.
  • the optical film in the first optical film group 241 is a first prism sheet.
  • the optical film may also be a diffusion sheet, which is not specifically limited herein.
  • the optical film in the second optical film group 242 is two, which are respectively a second prism sheet and a diffusion sheet, wherein the diffusion sheet is disposed between the second prism sheet and the light guide plate 23,
  • the second optical film group 242 may also be provided with more layers of optical films, which are not specifically limited herein.
  • the reflective sheet 25 and the first optical film group 241 are designed as a box structure with upper and lower inlays, and other components such as the LED light source 21 and the light guide plate 23 are fixed in the square box.
  • a complete backlight module is formed. Since the backlight module eliminates the conventional plastic frame component, the frame of the backlight module is narrowed, the structure of the backlight module is simplified, the cost is reduced, and at the same time, due to reflection
  • the side surface 252 of the sheet 25 is in contact with the light guide plate 23, so that light exposed from the side surface of the light guide plate 23 is returned to the light guide plate 23 by reflection of the reflection sheet 25, thereby improving the utilization of light.
  • the LED light source 21 and the light guide plate 23 are placed on the bottom surface 251 of the reflection sheet 25, and the light exit side of the LED light source 21 is opposed to the light incident side of the light guide plate 23;
  • the second optical film group 242 is placed on the light exiting side of the light guide plate 23, and the three sides of the second optical film group 242 are right-aligned with the three sides of the light guide plate 23, where the direction is "right. "refers to the direction from the LED light source 21 to the light guide plate 23;
  • the flexible circuit board 22 is attached to the inner surface of the first optical film group 241 and the first optical film group 241 is covered by the square box formed by the reflection sheet 25, the flexible circuit board 22 is at the LED light source 21.
  • the inner surface of the side surface of the first optical film group 241 is pasted with the double-sided tape 26, and is covered on the square box, and the four sides of the first optical film group 241 are sequentially pressed to make the first optical film.
  • the side surface of the group 241 is attached and fixed to the outer surface of the side surface 252 of the reflection sheet 25.
  • the backlight modules can be combined in other combinations.
  • the specific combination of the backlight modules is not limited.
  • the preferred embodiment further provides a liquid crystal display including a backlight module, the backlight module includes: an LED light source, a flexible circuit board, a light guide plate, an optical film set, and a reflective sheet, wherein the optical film set includes An optical film set and a second optical film set.
  • the backlight module includes: an LED light source, a flexible circuit board, a light guide plate, an optical film set, and a reflective sheet, wherein the optical film set includes An optical film set and a second optical film set.
  • the reflective sheet is composed of a bottom surface and four side surfaces, and the bottom surface and the four side surfaces define a square box for providing a receiving space for other components of the backlight module.
  • the LED light source is placed on the bottom surface of the reflective sheet, and the three sides of the non-light-emitting side of the LED light source are respectively in contact with the three sides of the reflective sheet.
  • the purpose of the LED light source is to fix the LED light source through the square box formed by the reflective sheet. .
  • the flexible circuit board is disposed above the LED light source and is fixed to the inner surface of the first optical film group.
  • the flexible circuit board is fixed on the plastic frame and the light guide plate by double-sided tape, and the flexible circuit board is exposed on the outer side, and the backlight module is transported, packaged, and mounted on the liquid crystal display. In the process, it is easy to break the flexible circuit board and need to replace the flexible circuit board, which not only wastes materials, but also wastes human resources.
  • the flexible circuit board is attached to the inner surface of the first optical film group, that is, the flexible circuit board is wrapped inside the backlight module, thereby reducing external damage to the flexible circuit board, thereby enabling the present invention.
  • the backlight module of the preferred embodiment is more practical.
  • the light guide plate is placed on the bottom surface of the reflective sheet, and the light incident side of the light guide plate is opposite to the light exit side of the LED light source, and the three sides of the non-light incident side of the light guide plate are in contact with the three side surfaces of the reflective sheet.
  • the light guide plate is fixed by a square box formed by the reflection sheet.
  • a second optical film group disposed on the light exiting side of the light guide plate, and three side surfaces of the second optical film group not opposite to the flexible circuit board are in contact with the three side surfaces of the reflective sheet, and are passed through the side surface of the reflective sheet Contact to hold the second optical film set.
  • a first optical film group consisting of a top surface and four side surfaces, a top surface of the first optical film group being disposed on the flexible circuit board and the second optical film group, four sides of the first optical film group
  • the inner surface is fixed to the outer surface of the four side surfaces of the reflection sheet, and the LED light source disposed in the reflection sheet is fixed by bonding the four side surfaces of the first optical film group to the four side surfaces of the reflection sheet.
  • the flexible circuit board, the light guide plate and the second optical film group are fixed in the upper and lower mosaic box structure composed of the reflection sheet and the first optical film group, thereby forming a complete backlight module.
  • the flexible circuit board includes an external interface portion, the external interface portion is configured to be connected to an external power source to provide a voltage to the backlight module, and the external interface portion is opened on the side of the first optical film group.
  • the external interface portion can be taken out from other positions of the backlight module, and is not specifically limited herein.
  • the fixing and fixing manner in the backlight module is fixed by double-sided adhesive bonding. In other embodiments, it may be fixed by thermosetting adhesive bonding, which is not specifically limited herein. .
  • the optical film in the first optical film group is a first prism sheet.
  • the optical film may also be a diffusion sheet, which is not specifically limited herein.
  • the optical film in the second optical film group is two pieces, which are respectively a second prism sheet and a diffusion sheet, wherein the diffusion sheet is placed between the second prism sheet and the light guide plate, in other
  • the second optical film group can also be provided with more layers of optical films, and no specific restrictions are imposed herein.
  • the preferred embodiment provides a liquid crystal display.
  • the frame of the liquid crystal display is narrowed, so that the liquid crystal display provided by the preferred embodiment displays a larger screen under the same screen size.
  • the effect is better, which satisfies the market demand for a narrow-border liquid crystal display.
  • the liquid crystal display has the advantages of low manufacturing cost, high light utilization efficiency, and high backlight brightness of the liquid crystal display.

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Abstract

一种背光模组及液晶显示器，背光模组通过把反射片(25)和第一光学膜片组(241)设计成一个上下镶嵌的盒式结构，将背光模组的其他部件固定在盒内，从而形成了一个完整的背光模组，该背光模组具有边框窄、结构简单、成本降低、光线的利用率高等优点，该液晶显示器具有边框窄等优点。

Description

一种背光模组及液晶显示器
本申请要求于2016年03月03日提交中国专利局、申请号为CN201610120983.1、发明名称为“一种背光模组及液晶显示器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及液晶显示技术领域，特别是涉及一种背光模组及液晶显示器。
 背景技术
液晶显示装置广泛地应用在各类电子产品上，随着电子产品的窄边框的需求增高，作为液晶显示装置的一个重要部件背光模组的窄边框设计逐渐成为一种趋势。
目前市面上的背光模组的结构如图1所示，图为现有的背光模组的结构示意图，其包括胶框11、LED光源12、柔性电路板(FPC)13、导光板14、光学膜片组15、反射片16和双面胶17。由于胶框11自身具有一定的厚度，其必定会增加背光模组的边框宽度，使整个液晶显示装置的宽度也增加，从而不能满足市场对窄边框的需求；另外，现有的背光模组中设有胶框，使得整个背光模组的结构也更加复杂，制造成本也相应提高，且导光板14的侧面露出的光无法重新反射回导光板，造成光线利用率低的问题。
因此，有必要提供一种窄边框的背光模组，不但可以降低背光模组的边框宽度，满足市场对窄边框的需求，还可以使得背光模组的结构简化，成本降低，同时，也可以将导光板的侧面露出的光重新反射回导光板，从而提高光线的利用率。
 技术问题
本发明实施例提供一种背光模组，以解决目前背光模组的边框过宽的问题；本发明实施例还提供一种液晶显示器，以解决现有技术中由于液晶显示器边框过宽，导致在相同屏幕尺寸下，所观看到的画面更小的问题。
 技术解决方案
本发明实施例提供一种液晶显示器，其包括背光模组，所述背光模组包括：LED光源、柔性电路板、导光板、光学膜片组和反射片，其中所述光学膜片组包括第一光学膜片组和第二光学膜片组，其中
所述反射片，由一个底面和四个侧面组成，所述底面与四个侧面围成一个方形盒子；
所述LED光源，放置在所述反射片的底面上，所述LED光源的非出光侧的三个侧面分别与所述反射片的三个侧面相接触；
所述导光板，放置在所述反射片的底面上，所述导光板的入光侧与所述LED光源的出光侧相对，所述导光板的非入光侧的三个侧面与所述反射片的三个侧面相接触；
所述柔性电路板，设置在所述LED光源的上方，与所述第一光学膜片组的内表面通过双面胶粘接固定；
所述第二光学膜片组，置于所述导光板的出光侧上，所述第二光学膜片组的不与柔性电路板相对的三个侧面与所述反射片的三个侧面相接触；
所述第一光学膜片组，由一个顶面和四个侧面组成，所述顶面置于所述柔性电路板和第二光学膜片组上，所述第一光学膜片组的四个侧面的内表面与所述反射片的四个侧面的外表面通过双面胶粘接固定。
在本发明所述的液晶显示器中，所述第一光学膜片组中的光学膜片为第一棱镜片；所述第二光学膜片组包括第二棱镜片和扩散片，所述扩散片置于所述第二棱镜片和导光板之间。
在本发明所述的液晶显示器中，所述第二光学膜片组中，光学膜片的数量至少包括2个。
在本发明所述的液晶显示器中，所述柔性电路板包括对外接口部，所述对外接口部通过在所述第一光学膜片组的侧面开槽引出。
本发明实施例还提供一种背光模组，包括：LED光源、柔性电路板、导光板、光学膜片组和反射片，其中，所述光学膜片组包括第一光学膜片组和第二光学膜片组；
所述反射片，由一个底面和四个侧面组成，所述底面与四个侧面围成一个方形盒子；
所述LED光源，放置在所述反射片的底面上，所述LED光源的非出光侧的三个侧面分别与所述反射片的三个侧面相接触；
所述导光板，放置在所述反射片的底面上，所述导光板的入光侧与所述LED光源的出光侧相对，所述导光板的非入光侧的三个侧面与所述反射片的三个侧面相接触；
所述柔性电路板，设置在所述LED光源的上方，与所述第一光学膜片组的内表面相贴合固定；
所述第二光学膜片组，置于所述导光板的出光侧上，所述第二光学膜片组的不与柔性电路板相对的三个侧面与所述反射片的三个侧面相接触；
所述第一光学膜片组，由一个顶面和四个侧面组成，所述顶面置于所述柔性电路板和第二光学膜片组上，所述第一光学膜片组的四个侧面的内表面与所述反射片的四个侧面的外表面相贴合固定。
在本发明所述的背光模组中，所述贴合固定的固定方式包括采用双面胶或者热固胶粘接固定。
在本发明所述的背光模组中，所述第一光学膜片组中的光学膜片为第一棱镜片。
在本发明所述的背光模组中，所述第二光学膜片组中，光学膜片的数量至少包括2个。
在本发明所述的背光模组中，所述第二光学膜片组包括第二棱镜片和扩散片，所述扩散片置于所述第二棱镜片和导光板之间。
在本发明所述的背光模组中，所述柔性电路板包括对外接口部，所述对外接口部通过在所述第一光学膜片组的侧面开槽引出。
本发明实施例又提供另外一种液晶显示器，所述液晶显示器包括背光模组，所述背光模组包括：LED光源、柔性电路板、导光板、光学膜片组和反射片，其中，所述光学膜片组包括第一光学膜片组和第二光学膜片组；
所述反射片，由一个底面和四个侧面组成，所述底面与四个侧面围成一个方形盒子；
所述LED光源，放置在所述反射片的底面上，所述LED光源的非出光侧的三个侧面分别与所述反射片的三个侧面相接触；
所述导光板，放置在所述反射片的底面上，所述导光板的入光侧与所述LED光源的出光侧相对，所述导光板的非入光侧的三个侧面与所述反射片的三个侧面相接触；
所述柔性电路板，设置在所述LED光源的上方，与所述第一光学膜片组的内表面相贴合固定；
所述第二光学膜片组，置于所述导光板的出光侧上，所述第二光学膜片组的不与柔性电路板相对的三个侧面与所述反射片的三个侧面相接触；
所述第一光学膜片组，由一个顶面和四个侧面组成，所述顶面置于所述柔性电路板和第二光学膜片组上，所述第一光学膜片组的四个侧面的内表面与所述反射片的四个侧面的外表面相贴合固定。
在本发明所述的液晶显示器中，所述背光模组中的第一光学膜片组中的光学膜片为第一棱镜片；所述第二光学膜片组包括第二棱镜片和扩散片，所述扩散片置于所述第二棱镜片和导光板之间。
在本发明所述的液晶显示器中，所述背光模组中的第二光学膜片组的光学膜片的数量至少包括2个。
在本发明所述的液晶显示器中，所述柔性电路板包括对外接口部，所述对外接口部通过在所述第一光学膜片组的侧面开槽引出。
 有益效果
与现有技术相比，本发明实施例提供的背光模组，通过把反射片和第一光学膜片组设计成一个上下镶嵌的盒式结构，将LED光源、导光板等部件固定在盒内，从而形成了一个完整的背光模组，由于该背光模组省去了现有技术中的胶框部件，使得背光模组的边框变窄，背光模组的结构简化，成本降低，同时，由于反射片的侧面与导光板相接触，使得从导光板的侧面露出的光经过反射片的反射重新回到导光板中，从而提高光线的利用率，增强了背光亮度。
本发明实施例还提供一种液晶显示器，通过采用本发明提供的背光模组，将液晶显示器的边框变窄，使得在相同屏幕尺寸下，本发明提供的液晶显示器所显示的画面更大，效果更好，满足了市场对窄边框液晶显示器的需求，同时，该液晶显示器还具有制造成本低，光线利用率高，液晶显示器的背光亮度高等优点。
 附图说明
图1为现有的背光模组的结构示意图；
图2为本发明的背光模组的横截面示意图；
图3为本发明的背光模组的导光板侧的侧截面示意图；
图4为本发明的背光模组的反射片展开后的形状示意图。
 本发明的最佳实施方式
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面对实施例中所需要使用的附图作简单的介绍。下面描述中的附图仅为本发明的部分实施例，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获取其他的附图。
请参见图2，图2为本发明的背光模组的横截面示意图。本发明优选实施例提供一种背光模组，其包括：LED光源21、柔性电路板22、导光板23、光学膜片组24和反射片25，其中，光学膜片组24包括第一光学膜片组241和第二光学膜片组242。
反射片25，由一个底面251和四个侧面252组成，底面251与四个侧面252围成一个方形盒子，该方形盒子用于给背光模组的其他部件提供收容空间。
LED光源21，放置在反射片25的底面251上，LED光源21的非出光侧的三个侧面分别与反射片的三个侧面252相接触，这样做的目的是通过反射片25所形成的方形盒子将LED光源21固定住。
柔性电路板22，设置在LED光源21的上方，与第一光学膜片组241的内表面相贴合固定。在现有技术中，请参照图1，柔性电路板13通过双面胶17固定在胶框11与导光板14上，且柔性电路板13暴露在外侧，在背光模组的运输、封装、以及安装在液晶显示器等过程中，很容易将柔性电路板13弄坏，需要重新更换柔性电路板13，不但浪费材料，还浪费了人力资源。而在本优选实施例中，图2中的柔性电路板22贴合在第一光学膜片组241的内表面，即将柔性电路板22包裹在背光模组的里面，在起到固定柔性电路板22的作用的同时，也减少了外界对柔性电路板22的损伤，进而使得本优选实施例的背光模组的实用性更强。
导光板23，放置在反射片25的底面251上，导光板23的入光侧与LED光源21的出光侧相对，导光板23的非入光侧的三个侧面与反射片的三个侧面252相接触，这样做的目的是通过反射片25所形成的方形盒子将导光板23固定住。
第二光学膜片组242，置于导光板23的出光侧上，第二光学膜片组242的不与柔性电路板22相对的三个侧面与反射片的三个侧面252相接触，通过与反射片的侧面252相接触来固定住第二光学膜片组242。
第一光学膜片组241，由一个顶面和四个侧面组成，第一光学膜片组241的顶面置于柔性电路板22和第二光学膜片组242上，第一光学膜片组241的四个侧面的内表面与反射片的四个侧面252的外表面相贴合固定，通过将第一光学膜片组241的四个侧面与反射片的四个侧面252相贴合固定，使得设置于反射片25内的LED光源21、柔性电路板22、导光板23以及第二光学膜片组242固定在由反射片25和第一光学膜片组241所组成的上下镶嵌盒式结构里，从而形成一个完整的背光模组。
在本优选实施例中，反射片25的侧面252置于第一光学膜片组241的内表面处，即反射片25的侧面252与导光板23相接触，这样可以将从导光板23的侧面漏出的光重新反射到导光板23中，背光模组的光线利用率大大提高。
在本优选实施例中，由于反射片25与第一光学膜片组241相贴合的位置处在背光模组的侧面，相比于现有技术，本优选实施例中的背光模组其底部平整，从而使得背光模组与显示屏贴合时，背光模组不容易倾斜，从背光模组出射的光线更加均匀，同时由于反射片25与第一光学膜片组241的侧面贴合固定，使得背光模组的侧面至少包括两层结构，即反射片25的侧面252和第一光学膜片组241的侧面，使得背光模组的机械硬度更强。
由于图2仅仅可以观看到各个组件的左右两个侧面，为了更好的理解本优选实施例中给出的背光模组的结构，本优选实施例给出了的背光模组的导光板一侧的侧截面示意图，请参见图3，图3展示了图2中各个组件的另外两个侧面，即反射片25、光学膜片组24和导光板23的前后两个侧面，图3与图2的结合可以很容易地让本领域的技术人员明白本优选实施例中的背光模组的结构。
为了进一步了解本优选实施例中背光模组的反射片25的形状结构，本优选实施例给出了背光模组的反射片25展开后的形状示意图，请参见图4，在进行背光模组组装时，将反射片25沿图4中的虚线进行弯折，使得反射片25的四个侧面252竖立起来，与底面251的部分结合，从而形成一个方形的盒子。需要说明的是，第一光学膜片组241的形状结构与反射片25的形状结构类似，根据说明书的内容，本领域的技术人员很容易知道第一光学膜片组241的形状结构，在此不再赘述。
在本优选实施例中，柔性电路板22包括对外接口部，对外接口部用来与外界电源相接通，以便外界向背光模组提供电压；对外接口部通过在第一光学膜片组241的侧面开槽引出，在其他的实施例中，对外接口部可以从背光模组的其他位置引出，在此不做具体限定。
在本优选实施例中，贴合固定的固定方式采用双面胶26粘接固定，在其他的实施例中，也可以采用热固胶粘接固定，在此不做具体限定。
在本优选实施例中，第一光学膜片组241中的光学膜片为第一棱镜片，在其他实施例中，也可以为扩散片，在此不做具体限定。
在本优选实施例中，第二光学膜片组242中的光学膜片为两片，分别为第二棱镜片和扩散片，其中，扩散片置于第二棱镜片和导光板23之间，在其他实施例中，第二光学膜片组242也可以设置更多层光学膜片，在此不做具体限制。
本优选实施例提供的背光模组，通过把反射片25和第一光学膜片组241设计成一个上下镶嵌的盒式结构，将LED光源21、导光板23等其他部件固定在方形盒内，从而形成了一个完整的背光模组，由于该背光模组省去了现有技术中的胶框部件，使得背光模组的边框变窄，背光模组的结构简化，成本降低，同时，由于反射片25的侧面252与导光板23相接触，使得从导光板23的侧面露出的光经过反射片25的反射重新回到导光板23中，从而提高光线的利用率。
为了可以更清晰的说明本优选实施例中的背光模组的结构，下面将简述背光模组的一种组装过程。
将反射片25平铺在平整的工作台上；
将LED光源21和导光板23放置在反射片25的底面251上，并且使LED光源21的出光侧与导光板23的入光侧相对；
将第二光学膜片组242放置在导光板23的出光侧上，且使得第二光学膜片组242的三个侧边与导光板23的三个侧边右对齐，此处的方向“右”是指与从LED光源21到导光板23的方向；
将反射片25的侧面252向上折起，并与LED光源21和导光板23的相应的侧面相接触；
将柔性电路板22贴合在第一光学膜片组241的内表面上，并确保第一光学膜片组241盖在反射片25所形成的方形盒子时，柔性电路板22处于LED光源21的上方；
将第一光学膜片组241的侧面的内表面贴好双面胶26，并将其盖在方形盒子上，依次按下第一光学膜片组241的四个侧面，使得第一光学膜片组241的侧面与反射片25的侧面252的外表面相贴合固定。
以上仅为背光模组的一种组合方式，在其他的实施例中，背光模组可以按照其他组合方式进行组合，在本优选实施例中，不对背光模组的具体组合方式进行限制。
本优选实施例还提供一种液晶显示器，其包括背光模组，背光模组包括：LED光源、柔性电路板、导光板、光学膜片组和反射片，其中，所述光学膜片组包括第一光学膜片组和第二光学膜片组。
反射片，由一个底面和四个侧面组成，底面与四个侧面围成一个方形盒子，该方形盒子用于给背光模组的其他部件提供收容空间。
LED光源，放置在反射片的底面上，LED光源的非出光侧的三个侧面分别与反射片的三个侧面相接触，这样做的目的是通过反射片所形成的方形盒子将LED光源固定住。
柔性电路板，设置在LED光源的上方，与第一光学膜片组的内表面相贴合固定。在现有技术中，请参照图1，柔性电路板通过双面胶固定在胶框与导光板上，且柔性电路板暴露在外侧，在背光模组的运输、封装、以及安装在液晶显示器等过程中，很容易将柔性电路板弄坏，需要重新更换柔性电路板，不但浪费材料，还浪费了人力资源。
而在本优选实施例中，将柔性电路板贴合在第一光学膜片组的内表面，即将柔性电路板包裹在背光模组的里面，从而减少外界对柔性电路板的损伤，进而使得本优选实施例的背光模组的实用性更强。
导光板，放置在反射片的底面上，导光板的入光侧与LED光源的出光侧相对，导光板的非入光侧的三个侧面与反射片的三个侧面相接触，这样做的目的是通过反射片所形成的方形盒子将导光板固定住。
第二光学膜片组，置于导光板的出光侧上，第二光学膜片组的不与柔性电路板相对的三个侧面与反射片的三个侧面相接触，通过与反射片的侧面相接触来固定住第二光学膜片组。
第一光学膜片组，由一个顶面和四个侧面组成，第一光学膜片组的顶面置于柔性电路板和第二光学膜片组上，第一光学膜片组的四个侧面的内表面与反射片的四个侧面的外表面相贴合固定，通过将第一光学膜片组的四个侧面与反射片的四个侧面相贴合固定，使得设置于反射片内的LED光源、柔性电路板、导光板以及第二光学膜片组固定在由反射片和第一光学膜片组所组成的上下镶嵌盒式结构里，从而形成一个完整的背光模组。
在本优选实施例中，柔性电路板包括对外接口部，对外接口部用来与外界电源相接通，以便外界向背光模组提供电压；对外接口部通过在第一光学膜片组的侧面开槽引出，在其他的实施例中，对外接口部可以从背光模组的其他位置引出，在此不做具体限定。
在本优选实施例中，在背光模组中的贴合固定的固定方式采用双面胶粘接固定，在其他的实施例中，也可以采用热固胶粘接固定，在此不做具体限定。
在本优选实施例中，第一光学膜片组中的光学膜片为第一棱镜片，在其他实施例中，也可以为扩散片，在此不做具体限定。
在本优选实施例中，第二光学膜片组中的光学膜片为两片，分别为第二棱镜片和扩散片，其中，扩散片置于第二棱镜片和导光板之间，在其他实施例中，第二光学膜片组也可以设置更多层光学膜片，在此不做具体限制
本优选实施例提供一种液晶显示器，通过采用本发明提供的背光模组，将液晶显示器的边框变窄，使得在相同屏幕尺寸下，本优选实施例提供的液晶显示器所显示的画面更大，效果更好，满足了市场对窄边框液晶显示器的需求，同时，该液晶显示器还具有制造成本低，光线利用率高，液晶显示器的背光亮度高等优点。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (14)

  1. 一种液晶显示器，其包括背光模组，所述背光模组包括：LED光源、柔性电路板、导光板、光学膜片组和反射片，其中所述光学膜片组包括第一光学膜片组和第二光学膜片组，其中
    所述反射片，由一个底面和四个侧面组成，所述底面与四个侧面围成一个方形盒子；
    所述LED光源，放置在所述反射片的底面上，所述LED光源的非出光侧的三个侧面分别与所述反射片的三个侧面相接触；
    所述导光板，放置在所述反射片的底面上，所述导光板的入光侧与所述LED光源的出光侧相对，所述导光板的非入光侧的三个侧面与所述反射片的三个侧面相接触；
    所述柔性电路板，设置在所述LED光源的上方，与所述第一光学膜片组的内表面通过双面胶粘接固定；
    所述第二光学膜片组，置于所述导光板的出光侧上，所述第二光学膜片组的不与柔性电路板相对的三个侧面与所述反射片的三个侧面相接触；
    所述第一光学膜片组，由一个顶面和四个侧面组成，所述顶面置于所述柔性电路板和第二光学膜片组上，所述第一光学膜片组的四个侧面的内表面与所述反射片的四个侧面的外表面通过双面胶粘接固定。
  2. 根据权利要求1所述的液晶显示器，其中所述第一光学膜片组中的光学膜片为第一棱镜片；所述第二光学膜片组包括第二棱镜片和扩散片，所述扩散片置于所述第二棱镜片和导光板之间。
  3. 根据权利要求1所述的液晶显示器，其中所述第二光学膜片组中，光学膜片的数量至少包括2个。
  4. 根据权利要求1所述的液晶显示器，其中所述柔性电路板包括对外接口部，所述对外接口部通过在所述第一光学膜片组的侧面开槽引出。
  5. 一种背光模组，包括：LED光源、柔性电路板、导光板、光学膜片组和反射片，其中所述光学膜片组包括第一光学膜片组和第二光学膜片组，其中
    所述反射片，由一个底面和四个侧面组成，所述底面与四个侧面围成一个方形盒子；
    所述LED光源，放置在所述反射片的底面上，所述LED光源的非出光侧的三个侧面分别与所述反射片的三个侧面相接触；
    所述导光板，放置在所述反射片的底面上，所述导光板的入光侧与所述LED光源的出光侧相对，所述导光板的非入光侧的三个侧面与所述反射片的三个侧面相接触；
    所述柔性电路板，设置在所述LED光源的上方，与所述第一光学膜片组的内表面相贴合固定；
    所述第二光学膜片组，置于所述导光板的出光侧上，所述第二光学膜片组的不与柔性电路板相对的三个侧面与所述反射片的三个侧面相接触；
    所述第一光学膜片组，由一个顶面和四个侧面组成，所述顶面置于所述柔性电路板和第二光学膜片组上，所述第一光学膜片组的四个侧面的内表面与所述反射片的四个侧面的外表面相贴合固定。
  6. 根据权利要求5所述的背光模组，其中所述贴合固定的固定方式包括采用双面胶或者热固胶粘接固定。
  7. 根据权利要求5所述的背光模组，其中所述第一光学膜片组中的光学膜片为第一棱镜片。
  8. 根据权利要求5所述的背光模组，其中所述第二光学膜片组中，光学膜片的数量至少包括2个。
  9. 根据权利要求5所述的背光模组，其中所述第二光学膜片组包括第二棱镜片和扩散片，所述扩散片置于所述第二棱镜片和导光板之间。
  10. 根据权利要求5所述的背光模组，其中所述柔性电路板包括对外接口部，所述对外接口部通过在所述第一光学膜片组的侧面开槽引出。
  11. 一种液晶显示器，其包括背光模组，所述背光模组包括：LED光源、柔性电路板、导光板、光学膜片组和反射片，其中所述光学膜片组包括第一光学膜片组和第二光学膜片组，其中
    所述反射片，由一个底面和四个侧面组成，所述底面与四个侧面围成一个方形盒子；
    所述LED光源，放置在所述反射片的底面上，所述LED光源的非出光侧的三个侧面分别与所述反射片的三个侧面相接触；
    所述导光板，放置在所述反射片的底面上，所述导光板的入光侧与所述LED光源的出光侧相对，所述导光板的非入光侧的三个侧面与所述反射片的三个侧面相接触；
    所述柔性电路板，设置在所述LED光源的上方，与所述第一光学膜片组的内表面相贴合固定；
    所述第二光学膜片组，置于所述导光板的出光侧上，所述第二光学膜片组的不与柔性电路板相对的三个侧面与所述反射片的三个侧面相接触；
    所述第一光学膜片组，由一个顶面和四个侧面组成，所述顶面置于所述柔性电路板和第二光学膜片组上，所述第一光学膜片组的四个侧面的内表面与所述反射片的四个侧面的外表面相贴合固定。
  12. 根据权利要求11所述的液晶显示器，其中所述第一光学膜片组中的光学膜片为第一棱镜片；所述第二光学膜片组包括第二棱镜片和扩散片，所述扩散片置于所述第二棱镜片和导光板之间。
  13. 根据权利要求11所述的液晶显示器，其中所述第二光学膜片组中，光学膜片的数量至少包括2个。
  14. 根据权利要求11所述的液晶显示器，其中所述柔性电路板包括对外接口部，所述对外接口部通过在所述第一光学膜片组的侧面开槽引出。
PCT/CN2016/082949 2016-03-03 2016-05-23 一种背光模组及液晶显示器 Ceased WO2017148017A1 (zh)

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