WO2013177967A1 - 面光源装置及侧入式背光模组 - Google Patents

面光源装置及侧入式背光模组 Download PDF

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Publication number
WO2013177967A1
WO2013177967A1 PCT/CN2013/072537 CN2013072537W WO2013177967A1 WO 2013177967 A1 WO2013177967 A1 WO 2013177967A1 CN 2013072537 W CN2013072537 W CN 2013072537W WO 2013177967 A1 WO2013177967 A1 WO 2013177967A1
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WO
WIPO (PCT)
Prior art keywords
light
sheet
light leakage
source device
light source
Prior art date
Application number
PCT/CN2013/072537
Other languages
English (en)
French (fr)
Inventor
鹿堃
颜凯
布占场
王贺陶
李智
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to EP13728919.5A priority Critical patent/EP2857890B1/en
Priority to JP2015514326A priority patent/JP2015518259A/ja
Priority to US13/997,799 priority patent/US20140063846A1/en
Priority to KR1020137018069A priority patent/KR20140001239A/ko
Publication of WO2013177967A1 publication Critical patent/WO2013177967A1/zh

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Classifications

    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • 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
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means

Definitions

  • the present invention relates to the field of display backlight technologies, and in particular, to a surface light source device and a side-entry backlight module. Background technique
  • the backlight module is one of the important components of the liquid crystal display. Since the liquid crystal itself does not emit light, the function of the backlight module is to supply a sufficient light source with uniform brightness and uniform distribution, so that the liquid crystal display can display images normally. At present, in addition to liquid crystal display devices such as liquid crystal displays and liquid crystal televisions, backlight modules can also provide light sources for display devices such as digital photo frames, electronic papers, and mobile phones.
  • the backlight module is divided into a direct type backlight module and a side-in type backlight module according to the position of the light source.
  • the direct type backlight module the light source is directly placed under the light exit surface, and the light emitted by the light source is diffused and mixed by a space distance and the diffusion plate, and then emitted as a surface light source;
  • the side-entry backlight module The light source is placed on the side of the backlight module, and the light generated by the light source is incident on the light guide plate.
  • the light guide plate can atomize a line source (such as a Cold Cathode Fluorescent Lamp (CCFL)) or a point source (such as a Light Emitting Diode (LED)) into a uniform surface light source, and the light emitted from the light guide plate passes through The diffuser is diffused and deflected, and finally the divergence angle of the light is adjusted via the concentrating prism sheet.
  • a line source such as a Cold Cathode Fluorescent Lamp (CCFL)
  • a point source such as a Light Emitting Diode (LED)
  • the conventional side-lit backlight module includes an illuminator 1, a bottom reflection sheet 2, a diffusion plate 5, an optical film 6, a frame 8 and a light guide plate 9, and a light guide plate 9 made of a light guide plate substrate.
  • the invention has six surfaces, including: an incident surface for receiving the light beam, a bottom surface connected to the incident surface, an exit surface connected to the incident surface and opposite to the bottom surface, a side opposite to the incident surface, and the other two opposite sides side.
  • the illuminator 1 is disposed on one side of the casing 8, and the illuminating surface of the illuminator 1 is opposed to the light incident surface of the light guide plate 9.
  • the manner in which the illuminant 1 is disposed on the frame 8 includes, but is not limited to, bonding, screwing, and fastening of the engaging members.
  • the bottom surface of the light guide plate 9 is provided with an optical dot 10 made by a process such as printing, laser, injection molding, extrusion, or the like.
  • the bottom reflection sheet 2 has a diffuse reflection function.
  • the light emitted by the illuminator 1 is directly incident into the light guide plate 9.
  • the light guide plate 9 is usually made of an acrylic material, and the incident material has a large refractive index with respect to air. After the light enters the light guide plate, the light guide plate 9 undergoes multiple total reflections inside the light guide plate 9 and spreads to the inside of the entire light guide plate 9. When the incident light propagates to the optical mesh point 10, the light is emitted through the light exit surface of the light guide plate 9 to exit the light guide plate 9 . By adjusting the density of the optical dots 10, the brightness of the light emitted from the light guide plate 9 can be distributed over the entire light-emitting surface.
  • the optical dots 10 are formed on the bottom surface of the light guide plate 9 by a special process, and the distribution of the optical dots 10 needs to be precisely controlled, and the process is complicated and easy to produce defective products. Summary of the invention
  • the present invention provides a surface light source device and a side-entry backlight module.
  • a surface light source device includes an illuminator, a bottom reflection sheet, a light leakage sheet, and a plurality of side reflection sheets; the bottom reflection sheet and the plurality of side reflection sheets are configured to have an upper opening a light guide box, wherein the illuminant is disposed on at least one side reflection sheet of the plurality of side reflection sheets; the light leakage sheet is disposed in an upper opening of the light guide box, and the light from the illuminator passes through the light leakage sheet Changed to face ⁇ dog light shot.
  • a surface light source device includes an illuminant, a bottom reflection sheet, a light leakage sheet, a plurality of side reflection sheets, and a box frame;
  • the box frame has an opening and a plurality of sides a hollow wall, the illuminant is disposed on at least one sidewall of the plurality of sidewalls;
  • the side reflector is disposed on the remaining sidewalls of the plurality of sidewalls; In the opening of the casing, light from the illuminator is converted into planar light by the light leakage sheet.
  • a side-lit backlight module includes the above-described surface light source device, a diffusion plate, and an optical film, wherein the planar light emitted from the surface light source device passes through the diffusion plate and the optical film. And shot.
  • FIG. 2 is a cross-sectional view showing a side-lit backlight module according to an embodiment of the present invention
  • FIG. 3 is a schematic structural view of a light leakage sheet according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a support frame according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural view of the side-entry backlight module of FIG. 2;
  • FIG. 6 is a partial structural schematic view of the side-entry backlight module of FIG. 2.
  • the term "light leakage sheet” refers to a sheet having a perforated structure which is opaque Made of materials, light can travel through the perforations.
  • the function of the light leakage sheet is: 1 H light emitted by the light body is reflected multiple times on the inner surface thereof and propagates to the entire light guiding box; 2) the light emitted by the light emitting body leaks from the perforation of the light leakage sheet And can be emitted in the direction of the surface light source; 3) By adjusting the number of holes and the degree of density in the light leakage sheet, the brightness of the light emitting surface of the surface light source is more uniform.
  • a side-lit backlight module includes a surface light source device including an illuminator 1, a bottom reflection sheet 2, a plurality of side reflection sheets 3 (for example, four), and Light leakage sheet 4.
  • a surface light source device including an illuminator 1, a bottom reflection sheet 2, a plurality of side reflection sheets 3 (for example, four), and Light leakage sheet 4.
  • four side reflection sheets 3 (only one shown in the drawing) and one bottom reflection sheet 2 constitute a light guide box having an upper opening, specifically, four side reflection sheets 3 are configured as the guide.
  • the peripheral side wall of the light box, the bottom reflection sheet 2 is the bottom surface of the light guide box.
  • the inner surfaces of the side reflection sheet 3 and the bottom reflection sheet 2 are total reflection surfaces.
  • the illuminator 1 is disposed on one of the side reflection sheets 3, and the illuminator 1 may be disposed on two or more side reflection sheets as needed.
  • the light leakage sheet 4 is disposed in the upper opening of the light guide box and above the bottom reflection sheet 2.
  • the light leakage sheet 4 is parallel to the bottom reflection sheet 2. And separated from it.
  • a light guide box is formed by the bottom reflection sheet 2, the side reflection sheet 3, and the light leakage sheet 4.
  • the illuminant 1 can be a line source such as a cold cathode fluorescent lamp (CCFL) or a point source such as a light emitting diode (LED).
  • CCFL cold cathode fluorescent lamp
  • LED light emitting diode
  • the light leakage sheet 4 is a sheet made of an opaque material having a reflective function on the surface, and has a thickness of about 0 to 4 mm, for example, made of PET or PC material having a microbubble structure. As shown below, the light leakage sheet 4 is provided with a plurality of light leakage holes 12, 13, and the opposite side of the light leakage sheet 4 and the bottom reflection sheet 2 is a total reflection surface, and the function thereof is to enable the light that cannot be transmitted to be repeated as much as possible.
  • the surface of the light leakage sheet 4 opposite to the bottom reflection sheet 2 is a 3 ⁇ 4 radiation surface, and the function of the light exiting the light surface is as uniform as possible, so that the light emitted from the light leakage sheet appears as planar light.
  • the inner surface of the light guide box Since the inner surface of the light guide box has a total reflection effect, the light emitted from the illuminant 1 located on the side surface is reflected by the inner surface multiple times, diffused to the entire light guide box and formed through the light leakage holes 12, 13 on the light leakage sheet 4. Shaped light.
  • the light leakage sheet is provided with a plurality of light leakage holes 12, 13 which are arranged in an optical network dot array ,l, and light in the light guide box can be emitted through the light leakage holes 12, 13.
  • the brightness uniformity of the light-emitting surface of the light leakage sheet 4 can be adjusted, thereby achieving uniform brightness of the entire light-emitting surface.
  • the distribution density or aperture of the light leakage hole 12 on the far side of the light source ie, the light leakage hole farther from the illuminator 1
  • the distribution density or aperture of the light leakage hole 13 near the light source is smaller, and the aperture is controlled in FIG.
  • the size is taken as an example to describe the distribution of the dot array, wherein the aperture of the far side light leakage hole 12 of the light source is larger than the aperture of the light leakage hole 13 near the light source.
  • the light leakage holes 12, 13 of the light leakage sheet 4 can be laser cut/ Punch, or die stamping and other processes to make.
  • the light leakage sheet 4 In order to fix the light leakage sheet 4 in the upper opening of the light guide box, it can be fixed to the side wall of the light guide box by bonding. However, for the sake of stability, it is preferably fixed to the side wall of the light guide box by a mechanical structure.
  • the upper or lower surface of the periphery of the light leakage sheet 4 may be fixed to the side wall of the light guide box by means of a connecting member such as an L-shaped connecting piece, or the light leakage sheet 4 itself may be integrally formed with a plurality of protrusions for supporting, when When the light leakage sheet 4 is mounted in the light guide box, the projections abut against the bottom reflection sheet 2, or the light leakage sheet 4 is fixed by one or more support frames 7 provided on the bottom reflection sheet 2 which will be described later. Inside the opening.
  • the side-entry backlight module of FIG. 2 further includes a frame body having a box-like structure for accommodating the light guide box, and the size of the frame body is adapted to the size of the display panel.
  • the frame has an opening and is formed with a hollow or cavity, so that the bottom reflection sheet 2 and the side reflection sheet 3 can be fixed together with the illuminant 1 in the hollow or cavity (for example, by tape or screw), and light leakage
  • the sheet 4 is disposed in the opening and above the bottom reflection sheet 2 through the support frame 7.
  • the illuminant 1 can be arranged directly on at least one side wall of the frame 8 , for example by heat-conducting tape or screws; the bottom-reflecting sheet 2 can be arranged on the inner bottom surface of the frame 8 , for example.
  • the side reflection sheet 3 can be disposed on the remaining side walls of the frame body 8 on which the illuminant 1 is not disposed, for example, by attachment.
  • one or more support frames 7 may be provided on the bottom reflection sheet 2 to fix the light leakage sheet 4 in the light guide box or the opening, but there are many ways to achieve such a fixed assembly.
  • One of the ways may be referred to as “shape snapping", which is achieved by the inherent shape of the support frame 7 itself.
  • the support frame 7 can be a narrow, wide and wide cone having a smooth surface, and the light leakage sheet 4 can be caught in the cone by the inherent "contracted” shape characteristic of the cone. Keep it still in the upper or middle part.
  • Another way may be referred to as "mechanical snapping". As shown in FIGS.
  • the light leakage sheet 4 has at least one light leakage sheet engaging groove 11 through which the support frame 7 passes through the at least one light leakage sheet engaging groove 11 and The engagement is performed to fix the light leakage sheet 4 in the upper opening.
  • the support frame 7 is generally tapered and can be made of a transparent plastic material.
  • a light leakage plate engaging portion 14 is disposed on the upper portion of the support frame, and the light leakage plate engaging groove 11 is disposed on the light leakage plate.
  • the support frame 7 can be formed by the light leakage plate engagement portion 14 through the light leakage plate engagement groove 11 on the light leakage plate 4.
  • the fixing is such that the distance between the light leakage sheet 4 and the bottom reflection sheet 2 is fixed to form a stable light guiding box.
  • the support frame 7 can also be cylindrical or have other shapes that support. There are also a plurality of ways of fixing the support frame 7 to the bottom reflection sheet 2. For example, as shown in Figures 2 and 7, the support frame 7 can abut against the bottom reflective sheet 2. However, in order to achieve a secure connection, the support frame 7 can be bonded to the bottom reflection sheet 2, or mechanically, for example by means of a card hole, a groove or a connector. In one example, as shown in FIG. 4, a spherical projection 15 is provided at the lower portion of the support frame 7, which protrudes from the bottom surface of the support frame 7.
  • the frame body 8 and the bottom reflection sheet 2 are respectively provided with a frame groove and a bottom reflection plate groove at the same position so as to be engageable with the spherical protrusions 15.
  • the above-mentioned spherical convex portion is only schematic, and other convex portions such as a columnar shape may be employed.
  • the frame groove and the bottom reflective sheet groove should also have a matching shape.
  • a diffusing plate 5 and an optical film 6 are further disposed above the light emitting surface of the surface light source device (ie, the light leakage sheet), and the diffusing plate 5 is used for further diffusing the light emitted from the light guiding box to further distribute the light.
  • Uniform; Optical diaphragm 6 acts to change the shape of light.
  • light shape refers to the distribution of light in different directions.
  • the optical film 6 may include a plurality of films such as a prism film, a diffusion film, a DBEF, a protective film, and a microlens.
  • the diffusion plate 5 is also supported by the support frame 7 and has a certain mixing distance with the light leakage sheet 4.
  • the optical film 6 is disposed above the diffuser plate 5, preferably by the side walls of the frame 8.
  • the top of the support frame 7 that passes through the light-trapping engagement groove 11 forms a support for the diffuser plate 5.
  • the top of the support frame 7 is a round head, and the function of the round head is to minimize the contact area between the support frame 7 and the diffusion plate 5, to minimize the black point phenomenon on the surface of the surface light source, and to avoid the support frame 7 and the diffusion plate. Scratch between 5.
  • the light mixing distance between the light leakage sheet 4 and the diffusion plate 5 is used to shield the optical dots on the light leakage sheet.
  • This light mixing distance is determined by the distance between the light leakage sheet engaging groove 11 of the light leakage sheet 4 and the top of the support frame 7.
  • the light mixing distance is 0.
  • the light mixing distance is about 0 to 20 mm. .
  • side walls of the frame on which the illuminant 1 is located may or may not be provided with side reflections.
  • Sheet 3 When the side reflection sheet 3 is provided, the side reflection sheet 3 is located on the back of the illuminator 1 and totally reflects the light incident on the side wall.
  • the light leakage holes on the light leakage sheet 4 may also have the same aperture, but the density of the light leakage holes at the position close to the illuminant 1 (ie, the number of light leakage holes per unit area) Small, and the density of the light leakage holes at the position away from the illuminator 1 gradually becomes larger.
  • the shape of the support frame 7 may not necessarily be a tapered structure, and it is not necessary to provide support for the light leakage sheet 4 and the diffusion plate 5 by one support frame 7 at the same time. In fact, as long as the light leakage sheet and the diffusion plate can be supported, for example, respectively.
  • the frame 7 may not necessarily be a tapered structure, and it is not necessary to provide support for the light leakage sheet 4 and the diffusion plate 5 by one support frame 7 at the same time. In fact, as long as the light leakage sheet and the diffusion plate can be supported, for example, respectively.
  • the backlight module of the embodiment of the present invention can achieve high picture uniformity (uniformity is 60%, can be improved by dot adjustment) and light utilization. Rate (about 42%, regular structure 53%, can be improved by dot adjustment and surface improvement). Since the optical path in the light guide box is basically the same as the light path in the light guide plate in the conventional structure, the propagation path is spread in the air in a wide range, and the absorption of light by the acrylic material is avoided, so the utilization of the light energy can be compared with the conventional guide. The utilization of the light panel structure is roughly equivalent or superior to that of a conventional light guide plate structure.
  • the backlight module of the present invention can be applied to a display device, and the display device can be: a liquid crystal panel, an electronic paper, an OLED panel, a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, or the like, or any product having a display function or component.
  • the light mixing of the side light source is realized by the design of the reflective sheet and the light leakage sheet, so that the design of the light guide plate is omitted in the backlight module.
  • the backlight module of the embodiment of the invention reduces the thickness of the product by using the side entry type, and reduces the number of the illuminants, thereby reducing power consumption and cost;
  • the backlight module of the present invention can obtain uniform surface light emission without using the light guide plate, that is, the light emitted from the side-in light source, and the light guide plate is omitted, thereby further reducing the weight of the backlight module and reducing
  • the preparation process of the light leakage sheet and the dot array is single and the preparation process is completed.

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Abstract

本发明提供了一种面光源装置和侧入式背光模组。该面光源装置包括发光体、底反射片、漏光片和多个侧反射片；所述底反射片与多个侧反射片构造为具有一上开口的导光盒，所述发光体设置在所述多个侧反射片的至少一个侧反射片上；所述漏光片设置在所述导光盒的上开口内，使来自发光体的光经该漏光片转变为面状光射出。

Description

面光源装置及侧入式背光模组 技术领域
本发明涉及显示背光技术领域， 特别涉及一种面光源装置及侧入式背光 模组。 背景技术
背光模组为液晶显示器的重要组件之一， 由于液晶本身不发光， 背光模 组的功能就是供应充足的亮度与分布均匀的光源， 使液晶显示器能正常显示 影像。 目前， 背光模组除了应用在液晶显示器、 液晶电视机等液晶显示装置 之外， 还可以为数码相框、 电子纸、 手机等显示装置提供光源。
背光模组依据光源的位置不同分为直下式背光模组和侧入式背光模组。 其中， 在直下式背光模组中， 直接把光源安放在出光面下面， 光源发出的光 经过一段空间距离和扩散板的扩散和混合后， 成为面光源发射出来； 在侧入 式背光模组中， 光源放在背光模组的侧面， 由光源产生的光射至导光板内。 导光板能够将线光源 (如冷阴极荧光灯管 （Cold Cathode Fluorescent Lamp, CCFL ) )或点光源 (如发光二极管 （Light Emitting Diode, LED ) )雾化成均匀 的面光源， 从导光板射出的光经过扩散板被扩散与偏向， 最后再经由聚光棱 镜片对光线发散角度进行调整。
如图 1所示，传统侧入式背光模组包括发光体 1、底反射片 2、扩散板 5、 光学膜片 6、框体 8和导光板 9,由导光板基材制作的导光板 9具有六个表面， 包括： 一用以接收光束的入射面、 一与入射面相连的底面、 一与入射面相连 且与底面相对的出射面、 一与入射面相对的侧面及其余两个相对的侧面。 所 述发光体 1设置在框体 8的一侧， 发光体 1的出光面与导光板 9的入光面相 对。所述发光体 1设置在框体 8上的固定方式包括但不限于粘接、螺丝固定、 卡合部件固定。 导光板 9的底面设有通过印刷、 激光、 注塑、 挤压等工艺制 成的光学网点 10。 所述底反射片 2具有漫反射功能。
在传统的侧入式背光模组中，发光体 1发出的光直接入射至导光板 9内， 导光板 9通常由亚克力材料制成， 由于该材料相对空气的折射率较大， 入射 光进入导光板后在导光板 9内部经历多次全反射， 并扩展至整个导光板 9内 部， 当入射光传播至光学网点 10时，发生 ¾ 射而通过导光板 9的出光面射 出导光板 9。 通过调整光学网点 10的密度， 可以使导光板 9的出射光亮度在 整个出光面上均勾分布。
但是，在上述传统侧入式背光模组中， 由于亚克力材料的重量普遍较大， 而且由于亚克力材料价格较高， 产品通常成本较高。 此外， 光学网点 10需采 用特殊工艺形成在导光板 9的底面，并需要对光学网点 10的分布进行精确控 制， 工艺复杂且容易产生不良品。 发明内容
为了解决现有技术中侧入式背光模组的导光板质量重、 成本高、 导光板 光学网点加工复杂问题， 本发明提供了一种面光源装置及侧入式背光模组。
根据本发明的第一方面，提供一种面光源装置， 包括发光体、底反射片、 漏光片和多个侧反射片； 所述底反射片与多个侧反射片构造为具有一上开口 的导光盒， 所述发光体设置在所述多个侧反射片的至少一个侧反射片上； 所 述漏光片设置在所述导光盒的上开口内， 使来自发光体的光经该漏光片转变 为面 ^犬光射出。
根据本发明的第二方面，提供一种面光源装置， 包括发光体、底反射片、 漏光片、 多个侧反射片和盒装框体； 该盒装框体具有一开口和由多个侧壁围 成的一中空， 所述发光体设置在所述多个侧壁的至少一个侧壁上； 所述侧反 射片设置在所述多个侧壁的其余侧壁上； 所述漏光片设置在所述框体的开口 内， 使来自发光体的光经该漏光片转变为面状光射出。
根据本发明的第三方面， 提供一种侧入式背光模组， 包括上述的面光源 装置、 扩散板和光学膜片， 其中从面光源装置射出的面状光穿过扩散板和光 学膜片而射出。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 筒单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。 图 1为现有技术中侧入式背光模组的结构示意图；
图 2为本发明实施例中侧入式背光模组的剖面示意图；
图 3为本发明实施例中漏光片的结构示意图；
图 4为本发明实施例中支撑架的结构示意图；
图 5为图 2中侧入式背光模组的结构示意图；
图 6为图 2中侧入式背光模组的局部结构示意图。
附图标记说明：
1: 发光体， 2: 底反射片， 3: 侧反射片， 4: 漏光片， 5: 扩散板， 6: 光学膜片， 7: 支撑架， 8: 框体， 9: 导光板， 10: 光学网点， 11: 漏光片卡 合槽， 12: 光源远侧漏光孔， 13: 光源近侧漏光孔， 14: 漏光片卡合部， 15: 球状凸部。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明实施例的技术方案进行清楚、 完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
除非另作定义， 此处使用的技术术语或者科学术语应当为本发明所属领 域内具有一般技能的人士所理解的通常意义。 本发明专利申请说明书以及权 利要求书中使用的 "第一" 、 "第二" 以及类似的词语并不表示任何顺序、 数量或者重要性，而只是用来区分不同的组成部分。同样， "一个 "或者 "一" 等类似词语也不表示数量限制， 而是表示存在至少一个。 "包括" 或者 "包 含" 等类似的词语意指出现在 "包括" 或者 "包含" 前面的元件或者物件涵 盖出现在 "包括" 或者 "包含" 后面列举的元件或者物件及其等同， 并不排 除其他元件或者物件。 "连接" 或者 "相连" 等类似的词语并非限定于物理 的或者机械的连接， 而是可以包括电性的连接， 不管是直接的还是间接的。 "上" 、 "下" 、 "左" 、 "右" 等仅用于表示相对位置关系， 当被描述对 象的绝对位置改变后， 则该相对位置关系也可能相应地改变。
在本发明中， 术语 "漏光片" 指的是具有穿孔结构的片材， 其由不透光 材料制成， 光可以通过穿孔传播。 在本发明中， 漏光片的作用是： 1 H 光 体发出的光在其内表面发生多次反射， 并传播至整个导光盒； 2 )使发光体发 出的光从漏光片的穿孔中漏出， 并能够按面光源方向射出； 3 )通过对漏光片 中穿孔数量和疏密程度的调整， 使面光源发光面的亮度更均一。
如图 2所示， 本发明一优选实施例的侧入式背光模组包括面光源装置， 该面光源装置包括发光体 1、 底反射片 2、 多个侧反射片 3 (例如四个）及漏 光片 4。 如图 6所示， 四个侧反射片 3 (图中仅示出一个）和一个底反射片 2 构成具有上开口的导光盒， 具体来说， 四个侧反射片 3构成为所述导光盒的 周边侧壁， 底反射片 2为所述导光盒的底面。 侧反射片 3和底反射片 2的内 表面为全反射表面。 发光体 1设置在其中一个侧反射片 3上， 根据需要， 发 光体 1也可设置在两个以上的侧反射片上。 参见图 5 , 漏光片 4设置在所述 导光盒的上开口内， 且位于所述底反射片 2的上方， 优选地， 从图 2中可以 看出， 漏光片 4平行于底反射片 2并与之分离。 这样， 由底反射片 2、 侧反 射片 3 和漏光片 4 形成一个导光盒。 发光体 1 可以为例如冷阴极荧光灯 ( CCFL ) 的线光源或例如发光二极管 （LED ) 的点光源。
漏光片 4 是由表面具有反射功能的不透光材质制成的薄片， 厚度约为 0~4mm, 例如由具有微气泡结构的 PET或 PC材料制成。 如下所述， 漏光片 4提供有多个漏光孔 12、 13, 并且漏光片 4与底反射片 2相对的一面为全反 射表面， 其作用是使未能透出的光能够尽可能多的重复利用， 所述漏光片 4 的与底反射片 2相背的一面为 ¾ 射表面， 其作用是使出光面的光尽可能视 角均匀， 从而使从漏光片射出的光呈现为面状光。 由于导光盒的内表面均具 有全反射作用， 位于侧面的发光体 1发出的光经过内表面的多次反射， 扩散 至整个导光盒并通过漏光片 4上的漏光孔 12、 13形成面状出射光。
如图 3所示， 漏光片提供有多个漏光孔 12、 13 , 它们排布成光学网点阵 歹l , 导光盒内的光可以通过漏光孔 12、 13射出。 通过光学网点阵列的设计， 可以调节漏光片 4的出光面上的发光亮度均匀度， 从而实现整个出光面的亮 度均匀。 通常来说， 光源远侧漏光孔 12 (即距离发光体 1较远的漏光孔）的 分布密度或孔径较大，光源近侧漏光孔 13的分布密度或孔径较小， 图 3中以 控制孔径大小为例描述网点阵列的分布，其中光源远侧漏光孔 12的孔径大于 光源近侧漏光孔 13的孔径。 漏光片 4的漏光孔 12、 13可以通过激光切割 / 打孔， 或模具沖压等工艺方法来制作。
为了将漏光片 4固定在导光盒的上开口内， 可以通过粘结方式将其固定 在导光盒的侧壁上。 然而， 为了稳固起见， 优选利用机械结构将其固定在导 光盒的侧壁上。 例如， 可以利用诸如 L形连接片的连接件将位于漏光片 4周 边的上或下表面固定至导光盒的侧壁上， 或者漏光片 4本身一体形成有用于 支撑的多个凸起， 当漏光片 4安装在导光盒内时， 这些凸起抵靠在底反射片 2上， 或者通过下面将描述的设置在底反射片 2上的一个或多个支撑架 7把 漏光片 4固定在上开口内。
优选地， 图 2中的侧入式背光模组还包括用于容纳导光盒的具有盒状结 构的框体 8, 框体的尺寸与显示面板尺寸相适应。 所述框体具有一开口并形 成有一中空或腔， 从而可以将底反射片 2、 侧反射片 3连同发光体 1一起固 定在该中空或腔内 （例如可通过胶带或螺釘来实现） ， 漏光片 4通过支撑架 7设置在开口内以及底反射片 2的上方。
在一种变形方案中， 发光体 1可直接设置在框体 8的至少一个侧壁上， 例如可通过导热胶带或螺釘进行固定;底反射片 2设置在框体 8的内底面上， 例如可通过贴附方式实现； 侧反射片 3可设置在框体 8的不设置发光体 1的 其余侧壁上， 例如可通过贴附方式实现。
如前所述， 在底反射片 2上可以设置一个或多个支撑架 7, 从而将漏光 片 4固定在导光盒或开口内， 然而实现这种固定装配的方式有 4艮多种。 其中 一种方式可以称为 "形状卡合" ， 它通过支撑架 7自身的固有形状来实现。 具体地， 如图 2和 5所示， 支撑架 7可为上窄下宽的具有平滑表面的锥体， 利用锥体固有的 "渐缩" 的形状特点可将漏光片 4卡在锥体的上部或中部而 保持静止不动。 另一种方式可称为 "机械卡合" ， 如图 3和 4所示， 漏光片 4具有至少一个漏光片卡合槽 11 ,支撑架 7穿过该至少一个漏光片卡合槽 11 并与之卡合， 从而将漏光片 4固定在上开口内。 具体来说， 如图 4所示， 支 撑架 7大体为锥形， 其可由透明塑料材料制成。 支撑架的上部提供有一漏光 片卡合部 14,所述漏光片上设置有漏光片卡合槽 11 ,支撑架 7可以通过漏光 片 4上的漏光片卡合槽 11利用漏光片卡合部 14形成固定， 从而使漏光片 4 与底反射片 2的距离固定， 形成稳定的导光盒。 在另一个示例中， 支撑架 7 还可以为柱形或具有支撑作用的其他形状。 将支撑架 7固定至底反射片 2的方式同样有多种。例如， 图 2和 7所示， 支撑架 7可抵靠在底反射片 2上。 然而， 为了实现稳固连接， 可将支撑架 7 粘结至底反射片 2, 或者通过机械方式实现， 例如通过卡孔、 凹槽或连接件 等设置进行固定。 在一个示例中， 如图 4所示， 在支撑架 7下部提供有一球 状凸部 15 , 其从支撑架 7的底面凸出。 框体 8和底反射片 2分别提供有位于 相同位置上的框体槽和底反射片槽，从而能与球状凸部 15相互卡合。可以理 解， 上述球状凸部仅为示意性的， 还可以采用诸如柱状的其他形状的凸部， 在此情况下， 框体槽和底反射片槽也应具有相适配的形状。 另外， 优选在球 状凸部 15的中部设置一狭缝， 这样有利于球状凸部 15能挤入对应的槽内， 从而实现固定。
在面光源装置的出光面 （即漏光片） 的上方还设置有扩散板 5和光学膜 片 6, 扩散板 5用于对从导光盒中出射的光做进一步的扩散， 以使光线分布 更均匀； 光学膜片 6则起改变光形的作用， 这里， "光形" 是指光在不同方 向上的强弱分布。 光学膜片 6可包括棱镜膜、 扩散膜、 DBEF、 保护膜、 微 透镜 (microlens)等多种膜材。 在图 2中， 扩散板 5同样由支撑架 7支撑并与 漏光片 4间存在一定的混光距离。 光学膜片 6设在扩散板 5的上方， 优选由 框体 8的侧壁提供支撑。在优选的实施例中，穿过漏光片卡合槽 11的支撑架 7的顶部对扩散板 5形成支撑。
更优选地， 支撑架 7的顶部为圓头， 圓头的作用是使支撑架 7与扩散板 5 的接触面积最小， 以尽量减轻面光源表面的黑点现象， 并且避免支撑架 7 与扩散板 5之间的刮伤。
漏光片 4和扩散板 5之间的混光距离用以遮蔽漏光片上的光学网点。 该 混光距离由漏光片 4的漏光片卡合槽 11与支撑架 7的顶部之间的距离确定。 在理想状态下， 为了使最终得到的背光模组尽可能地薄， 期望该混光距离为 0,然而在实际生产中 4艮难达到这种理想状态，因此该混光距离约为 0~20mm。
本领域相关技术人员应能理解， 以上描述的实施例仅仅是本发明的优选 实施例， 在本发明的其他实施例中， 发光体 1所在的框体的侧壁上可以设置 或不设置侧反射片 3 , 当设置侧反射片 3时， 侧反射片 3位于发光体 1的背 部，对射向该侧壁的光进行全反射。漏光片 4上的漏光孔也可以为孔径相同， 只是在接近发光体 1的位置处的漏光孔密度（即单位面积上漏光孔数目）较 小， 而远离发光体 1的位置处的漏光孔密度逐渐变大。 支撑架 7的形状可以 不必为锥形结构， 也不必由一个支撑架 7同时对漏光片 4和扩散板 5提供支 撑， 事实上， 只要能对漏光片和扩散板提供支撑即可， 比如分别形成在框体
8和漏光片 4上的任意形状的支撑体均可。 因此， 上述对实施例中器件的形 状和位置的描述不应视为对本发明的各器件的限制。
在对上述本发明实施例的背光模组的模拟测试中证明， 上述本发明实施 例的背光模组能实现较高的画面均匀度（均匀度 60%, 通过网点调整还可以 提高）和光线利用率（约 42%, 常规结构 53%, 通过网点调整和表面改善能 够提高） 。 由于导光盒内光路与常规结构中导光板内光路基本相同， 但传播 路线很大范围内都是在空气中传播， 避免了亚克力材料对光线的吸收， 因此 光能的利用率能够与常规导光板结构的利用率大致相当， 或优于常规导光板 结构。
本发明的背光模组可以应用于显示装置中， 所述显示装置可以为： 液晶 面板、 电子纸、 OLED面板、 液晶电视、 液晶显示器、 数码相框、 手机、 平 板电脑等任何具有显示功能的产品或部件。
本发明实施例的方案中， 通过反射片和漏光片的设计实现了侧入光源的 混光， 从而在背光模组中省略了导光板的设计。 本发明实施例的背光模组与 传统直下式背光模组相比， 由于采用侧入式而大大降低了产品的厚度， 并且 减少了发光体的数量， 从而降低了功耗与成本； 而相对于传统侧入式背光模 组， 本发明的背光模组可以不使用导光板即由侧入光源发出的光得到均匀的 面出射光， 由于省略了导光板， 进一步减轻了背光模组的重量， 降低了成本； 同时由于光线在空气中传播， 避免了导光板对光线的吸收， 提高了光线利用 率； 此外， 漏光片和网点阵列的制备过程筒单， 筒化了制备工艺。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种面光源装置， 包括发光体、 底反射片、 漏光片和多个侧反射片； 所述底反射片与多个侧反射片构造为具有一上开口的导光盒， 所述发光体设 置在所述多个侧反射片的至少一个侧反射片上； 所述漏光片设置在所述导光 盒的上开口内， 使来自发光体的光经该漏光片转变为面状光射出。
2、根据权利要求 1所述的面光源装置，其中所述多个侧反射片用作所述 导光盒的周边侧壁， 所述底反射片用作所述导光盒的底面。
3、根据权利要求 1-2任一项所述的面光源装置， 其中所述漏光片设置在 所述底反射片的上方， 所述漏光片的与底反射片相对表面为全反射表面， 所 述漏光片的背表面为 ¾ 射表面。
4、根据权利要求 1-3任一项所述的面光源装置， 其中所述漏光片平行于 底反射片并与之分离。
5、根据权利要求 1-4任一项所述的面光源装置， 其中所述漏光片由不透 光材料制成，并具有多个漏光孔，使得来自发光体的光经该多个漏光孔射出。
6、根据权利要求 5所述的面光源装置，其中所述多个漏光孔排布成阵列， 并且所述漏光孔的分布密度或孔径随着与发光体的距离变大而逐渐增大。
7、根据权利要求 1-6任一所述的面光源装置，还包括设置在该导光盒内 的至少一个支撑架，所述漏光片通过该至少一个支撑架固定在所述上开口内。
8、根据权利要求 7所述的面光源装置，其中所述漏光片具有至少一个漏 光片卡合槽， 所述支撑架穿过该至少一个漏光片卡合槽并与之卡合。
9、根据权利要求 7-8任一项所述的面光源装置， 其中所述支撑架为锥形 或柱形结构。
10、 根据权利要求 1-9任一项所述的面光源装置， 还包括容纳导光盒的 盒装框体， 所述盒装框体具有一开口和一中空； 所述导光盒及发光体均设置 于所述中空中， 所述漏光片设置在该开口中。
11、根据权利要求 10所述的面光源装置，其中所述底反射片固定在所述 框体的内底面上， 所述支撑架的下部固定至所述底反射片。
12、 一种面光源装置， 包括发光体、 底反射片、 漏光片、 多个侧反射片 和盒装框体； 该盒装框体具有一开口和由多个侧壁围成的一中空， 所述发光 体设置在所述多个侧壁的至少一个侧壁上； 所述侧反射片设置在所述多个侧 壁的其余侧壁上； 所述漏光片设置在所述框体的开口内， 使来自发光体的光 经该漏光片转变为面状光射出。
13、根据权利要求 12所述的面光源装置，其中所述漏光片设置在所述底 反射片的上方， 所述漏光片的与底反射片相对表面为全反射表面， 所述漏光 片的背表面为 ¾ 射表面
14、 根据权利要求 12-13任一项所述的面光源装置， 其中所述漏光片由 不透光材料制成， 并具有多个漏光孔， 使得来自发光体的光经该多个漏光孔 射出。
15、 根据权利要求 12-14任一项所述的面光源装置， 还包括设置在中空 中的至少一个支撑架， 所述漏光片通过该至少一个支撑架固定在所述上开口 内。
16、 根据权利要求 12-15任一项所述的面光源装置， 所述漏光片具有至 少一个漏光片卡合槽，所述支撑架穿过该至少一个漏光片卡合槽并与之卡合。
17、 一种侧入式背光模组， 包括权利要求 1~16任一项所述的面光源装 置、 扩散板和光学膜片， 其中从面光源装置射出的面状光穿过扩散板和光学 膜片而射出。
18、根据权利要求 17所述的侧入式背光模组，其中所述扩散板与所述漏 光片之间的混光距离为 0~20mm。
19、 根据权利要求 17~18任一项所述的侧入式背光模组， 其中所述扩散 板由所述支撑架的顶部支撑。
20、 根据权利要求 17~19任一项所述的侧入式背光模组， 其中所述支撑 架的顶部为圓头。
PCT/CN2013/072537 2012-05-31 2013-03-13 面光源装置及侧入式背光模组 WO2013177967A1 (zh)

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