WO2020124891A1 - 背光模组及显示装置 - Google Patents

背光模组及显示装置 Download PDF

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Publication number
WO2020124891A1
WO2020124891A1 PCT/CN2019/082599 CN2019082599W WO2020124891A1 WO 2020124891 A1 WO2020124891 A1 WO 2020124891A1 CN 2019082599 W CN2019082599 W CN 2019082599W WO 2020124891 A1 WO2020124891 A1 WO 2020124891A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
guide plate
circuit board
light guide
backlight module
Prior art date
Application number
PCT/CN2019/082599
Other languages
English (en)
French (fr)
Inventor
黎胜明
郭庆
Original Assignee
武汉华星光电技术有限公司
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 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/487,614 priority Critical patent/US11175446B1/en
Publication of WO2020124891A1 publication Critical patent/WO2020124891A1/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
    • 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
    • G02B6/0066—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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging 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
    • G02B6/005—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
    • G02B6/0055—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
    • G02B6/0081—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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0093—Means for protecting the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • 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
    • G02B6/0081—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

Definitions

  • the present application relates to the field of display, in particular to a backlight module and a display device.
  • TFT-LCD Thin Film Transistor Liquid Crystal Display
  • the backlight module is a light source fixed on the back of the liquid crystal display.
  • the lighting effect of the backlight module will directly affect the visual effect of the LCD.
  • the screen ratio of the light emitting area of the backlight module is an important parameter to measure the quality of the backlight module. Since the light source has a fixed luminous angle and the light of the light source has a certain mixing distance, if the distance between the light emitting area of the backlight module and the light emitting surface of the light source is too small, the optical performance of the light source will be poor.
  • the light source is fixed by the circuit board, and one side of the circuit board is bonded to the upper surface of the plastic frame. If the bonding area of the circuit board is too small, the problem of separation of the circuit board and the plastic frame is likely to occur.
  • a backlight module which includes a backplane, a plastic frame, a light guide plate, and a light source part disposed inside the backplane;
  • the plastic frame is disposed on an inner edge of the back plate, and the plastic frame has a first surface with an inclined angle;
  • the light guide plate is provided on one side of the plastic frame
  • the light source part includes a circuit board and at least one light source provided on one side surface of the circuit board;
  • the first end of the circuit board is provided on the first surface, and the second end of the circuit board is provided on the light guide plate;
  • the light source is disposed in a gap between the plastic frame and the light guide plate;
  • circuit board is inclined on the plastic frame and the light guide plate, the first end of the circuit board is higher than the second end of the circuit board.
  • the inclination angle of the first surface is the same as the inclination angle of the circuit board.
  • the backlight module further includes an adhesive tape, and the circuit board is fixed to the plastic frame and the light guide plate by the adhesive tape.
  • the light source is a side light source
  • the light exit surface of the light source is a side surface of the light source
  • the light exit surface of the light source is perpendicular to the circuit board.
  • the light guide plate includes a light incident surface, and the light incident surface of the light guide plate is parallel to the light exit surface of the light source.
  • the backlight module further includes a reflective layer disposed between the light guide plate and the back plate.
  • the reflective layer protrudes from the light incident surface of the light guide plate
  • the reflective layer includes a reflective area and a diffusion area to enhance light diffusion, the diffusion area is provided at the light incident surface of the light guide plate.
  • the backlight module further includes a diffusion sheet disposed between the light guide plate and the back plate, the diffusion sheet is disposed on a light incident surface of the light guide plate Office.
  • the light guide plate includes a light exit area and a non-light exit area, the light exit area is provided at an end of the light guide plate close to the light source;
  • the backlight module further includes a light-shielding glue, and the light-shielding glue is disposed on the circuit board and the light guide plate and covers a non-light-exiting area of the light guide plate.
  • the circuit board is a flexible circuit board.
  • a display device including a display module and a backlight module
  • the backlight module includes a back plate and a plastic frame and a light guide plate disposed inside the back plate And the light source department;
  • the plastic frame is disposed on an inner edge of the back plate, and the plastic frame has a first surface with an inclined angle;
  • the light guide plate is provided on one side of the plastic frame
  • the light source part includes a circuit board and at least one light source provided on one side surface of the circuit board;
  • the first end of the circuit board is provided on the first surface, and the second end of the circuit board is provided on the light guide plate;
  • the light source is disposed in a gap between the plastic frame and the light guide plate;
  • circuit board is inclined on the plastic frame and the light guide plate, the first end of the circuit board is higher than the second end of the circuit board.
  • the inclination angle of the first surface is the same as the inclination angle of the circuit board.
  • the backlight module further includes an adhesive tape, and the circuit board is fixed to the plastic frame and the light guide plate by the adhesive tape.
  • the light source is a side light source
  • the light exit surface of the light source is a side surface of the light source
  • the light exit surface of the light source is perpendicular to the circuit board.
  • the light guide plate includes a light entrance surface, and the light entrance surface of the light guide plate is parallel to the light exit surface of the light source.
  • the backlight module further includes a reflective layer disposed between the light guide plate and the back plate.
  • the reflective layer protrudes from the light incident surface of the light guide plate
  • the reflective layer includes a reflective area and a diffusion area to enhance light diffusion, the diffusion area is provided at the light incident surface of the light guide plate.
  • the backlight module further includes a diffusion sheet disposed between the light guide plate and the back plate, the diffusion sheet is disposed at a light incident surface of the light guide plate .
  • the light guide plate includes a light exit area and a non-light exit area, the light exit area is provided at an end of the light guide plate close to the light source;
  • the backlight module further includes a light-shielding glue, the light-shielding glue is disposed on the circuit board and the light guide plate, and covers the non-light exit area of the light guide plate.
  • the circuit board is a flexible circuit board.
  • the circuit board is inclined in the backlight module to reduce the light mixing distance of the light source and increase the adhesive area between the plastic frame and the circuit board, thereby increasing the screen ratio of the light emitting area of the backlight module.
  • FIG. 1 is a cross-sectional view of a backlight module provided by a first embodiment of the present application.
  • the present application provides a backlight module and a display device to solve the problem of short light mixing distance of the light source in the setting of the backlight module and a small bonding area of the plastic frame and the circuit board.
  • FIG. 1 is a cross-sectional view of a backlight module 100 according to a first embodiment of the present application.
  • a backlight module 100 including a back plate 11 and a plastic frame 12, a light guide plate 14, and a light source 13 disposed inside the back plate 11.
  • the back plate 11 includes a bottom wall portion and a side wall portion that constitute a housing space, the light guide plate 14, the plastic frame 12, and the light source 13 may be housed in the housing In the space.
  • the back plate 11 is a metal back plate 11, preferably a metal back plate 11 with better heat dissipation effect is more conducive to heat dissipation of the backlight module 100.
  • the plastic frame 12 is disposed at an inner edge of the back plate 11, and the plastic frame 12 has an inclined first surface, and the inclination angle of the first surface is ⁇ .
  • the plastic frame 12 is disposed at the intersection of the bottom wall portion and the side wall portion.
  • the light guide plate 14 is disposed on one side of the plastic frame 12, the light guide plate 14 and the plastic frame 12 are disposed on the same plane, which is parallel to the bottom wall of the back plate 11 flat.
  • the light source 13 includes a circuit board 131 and at least one light source 132 disposed on a side surface of the circuit board 131.
  • the light source 132 includes an LED lamp.
  • the light source 132 is a side light source
  • the light emitting surface of the light source 132 is a side surface of the light source 132
  • the light emitting surface of the light source 132 is perpendicular to the circuit board 131 Settings.
  • the present application provides that the light incident surface of the light guide plate 14 is parallel to the light exit surface of the light source 132.
  • the backlight module 100 further includes a reflective layer 15 disposed between the light guide plate 14 and the back plate 11.
  • the reflective layer 15 protrudes from the light incident surface of the light guide plate 14;
  • the reflective layer 15 includes a reflective area 151 and a diffusion area 152 to enhance the diffusion of light
  • the diffusion area 152 is disposed at the light incident surface of the light guide plate 14 to break the light, Improve the uniformity of light on the incident side.
  • the backlight module 100 further includes a diffusion sheet disposed between the light guide plate 14 and the back plate 11, the diffusion sheet is provided in the light guide plate 14 At the light surface, it is used to break the light and improve the uniformity of the light on the light side.
  • the top surface of the light source 132 faces the bottom wall portion of the back plate 11.
  • the circuit board 131 is a strip-shaped circuit board 131, for example: a strip-shaped FPC (Flexible Printed Circuit) circuit board 131 or PCB (Printed Circuit Board) circuit board.
  • FPC Flexible Printed Circuit
  • PCB Printed Circuit Board
  • the first end 13a of the circuit board 131 is provided on the first surface, and the second end 13b of the circuit board 131 is provided on the light guide plate 14, it can also be understood that the circuit board 131 is fixed on the plastic frame 12 and the light guide plate 14 through the first end 13a and the second end 13b.
  • the light source 132 is disposed in a gap between the plastic frame 12 and the light guide plate 14.
  • the circuit board 131 is inclined on the plastic frame 12 and the light guide plate 14, the first end 13a of the circuit board 131 is higher than the second end 13b of the circuit board 131.
  • the contact surface of the plastic frame 12 and the circuit board 131 is a flat surface.
  • the first surface of the plastic frame 12 that contacts the circuit board 131 is an inclined surface.
  • the inclined surface can make the plastic frame 12 and the circuit board 131 have more The contact area further improves the adhesion between the plastic frame 12 and the circuit board 131.
  • C is the pasting length of the circuit board 131 and the rubber frame 12 when the circuit board 131 is flat
  • C1 is the circuit board 131 and the glue when the circuit board 131 is inclined
  • the lens refracts the light from the light source 132 onto the diffusion plate, and the light scattered by the light source 132 through the lens uniformly covers the diffusion plate, which requires a long mixing distance.
  • the circuit board 131 is inclined in the backlight module 100; accordingly, the angle of the light emitted by the light source 132 will also change.
  • L is the light mixing distance when the circuit board 131 is placed horizontally
  • L1 is the LED light mixing distance when the circuit board 131 is inclined
  • the inclination angle of the first surface is the same as the inclination angle of the circuit board 131.
  • the backlight module 100 further includes an adhesive tape 16, and the circuit board 131 is fixed on the plastic frame 12 and the light guide plate 14 by the adhesive tape 16.
  • the light guide plate 14 includes a light exit area and a non-light exit area, the light exit area is disposed at an end of the light guide plate 14 close to the light source 132.
  • the backlight module 100 further includes a light-shielding glue, the light-shielding glue is disposed on the circuit board 131 and the light guide plate 14, and covers the non-light exit area of the light guide plate 14.
  • the present application can increase the proportion of the light emitting area of the light guide plate 14 in the backlight module 100 through the above solution, and improve the light emitting efficiency of the backlight module 100.
  • a display device including a display panel and a backlight module 100
  • the backlight module 100 includes a back plate 11 and a plastic frame disposed inside the back plate 11 12.
  • the plastic frame 12 is disposed on an inner edge of the back plate 11, and the plastic frame 12 has a first surface with an inclined angle;
  • the light guide plate 14 is disposed on one side of the plastic frame 12;
  • the light source 13 includes a circuit board 131 and at least one light source 132 provided on one surface of the circuit board 131;
  • the first end 13a of the circuit board 131 is provided on the first surface, and the second end 13b of the circuit board 131 is provided on the light guide plate 14;
  • the light source 132 is disposed in a gap between the plastic frame 12 and the light guide plate 14;
  • the circuit board 131 is inclined on the plastic frame 12 and the light guide plate 14, the first end 13a of the circuit board 131 is higher than the second end 13b of the circuit board 131.
  • the inclination angle of the first surface is the same as the inclination angle of the circuit board 131.
  • the backlight module 100 further includes an adhesive tape 16, and the circuit board 131 is fixed on the plastic frame 12 and the light guide plate 14 through the adhesive tape 16.
  • the light source 132 is a side light source 132
  • the light emitting surface of the light source 132 is a side surface of the light source 132
  • the light guide plate 14 includes a light incident surface, and the light incident surface of the light guide plate 14 is parallel to the light exit surface of the light source 132.
  • the backlight module 100 further includes a reflective layer 15 disposed between the light guide plate 14 and the back plate 11.
  • the reflective layer 15 protrudes from the light incident surface of the light guide plate 14;
  • the reflective layer 15 includes a reflective area 151 and a diffusion area 152 to enhance light diffusion, the diffusion area 152 is disposed at the light incident surface of the light guide plate 14.
  • the backlight module 100 further includes a diffusion sheet disposed between the light guide plate 14 and the back plate 11, the diffusion sheet is disposed in the light guide plate 14 Smooth surface.
  • the light guide plate 14 includes a light exit area and a non-light exit area, the light exit area is disposed at an end of the light guide plate 14 close to the light source 132.
  • the backlight module 100 further includes a light-shielding glue, the light-shielding glue is disposed on the circuit board 131 and the light guide plate 14, and covers the non-light exit area of the light guide plate 14.
  • the circuit board is inclined in the backlight module to reduce the light mixing distance of the light source and increase the pasting area of the plastic frame and the circuit board, thereby increasing the screen ratio of the light emitting area of the backlight module.

Abstract

一种背光模组（100）及显示装置，背光模组（100）包括背板（11）、胶框（12）、导光板（14）以及光源部（13）。胶框（12）具有一倾斜角度的第一表面。光源部（13）包括线路板（131）和光源（132）。线路板（131）的第一端（13a）设置在第一表面上，线路板（131）的第二端（13b）设置在导光板（14）上。线路板（131）斜置在胶框（12）和导光板（14）上。

Description

[根据细则26改正21.05.2019]　 背光模组及显示装置 技术领域
[根据细则26改正21.05.2019]　
本申请涉及显示领域，特别涉及一种背光模组及显示装置。
 背景技术
[根据细则26改正21.05.2019]　
TFT-LCD(Thin Film Transistor Liquid Crystal Display，薄膜晶体管-液晶显示器)作为一种平板显示装置，因其具有体积小、功耗低、无辐射以及制作成本相对较低等特点，而越来越多地被应用于高性能显示领域当中。
[根据细则26改正21.05.2019]　
背光模组是固定在液晶显示器背面的光源。背光模组的发光效果将直接影响到液晶显示器的视觉效果。随着技术的发展，市场对液晶显示器的要求越来越高，进而提高了对背光模组的要求。背光模组的出光区域屏占比是衡量背光模组品质的一项重要参数。由于光源具有固定的发光角度，且光源的光存在一定的混光距离，如果背光模组的出光区域与光源的发光面距离过小会导光源的光学性能不良。再者，光源通过线路板固定，线路板的一侧与胶框的上表面粘结，若线路板的粘结面积过小，易出现线路板与胶框分离的问题。
[根据细则26改正21.05.2019]　
目前亟需一种背光模组及显示装置以解决上述问题。
 技术问题
[根据细则26改正21.05.2019]　
背光模组设置中光源混光距离较短，胶框和线路板粘结面积较小的问题。
 技术解决方案
[根据细则26改正21.05.2019]　
为解决上述问题，本申请提供的技术方案如下：
[根据细则26改正21.05.2019]　
根据本申请的一个方面，提供了一种背光模组，包括背板以及设置在所述背板内侧的胶框、导光板以及光源部；
[根据细则26改正21.05.2019]　
所述胶框设置在所述背板的内侧边缘，所述胶框具有一倾斜角度的第一表面；
[0009] 所述导光板设置在所述胶框的一侧；
[0010] 所述光源部包括线路板以及设置在所述线路板一侧表面的至少一个光源；
[0011] 所述线路板的第一端设置在所述第一表面上，所述线路板的第二端设置在所述导光板上；
[0012] 所述光源设置在所述胶框与所述导光板之间的空隙内；
[0013] 其中，所述线路板斜置在所述胶框和所述导光板上，所述线路板的第一端高于所述线路板的第二端。
[0014] 在本申请的背光模组中，所述第一表面的倾斜角与所述线路板的倾斜角度相同。
[0015] 在本申请的背光模组中，所述背光模组还包括胶带，所述线路板通过所述胶带固定在所述胶框与所述导光板上。
[0016] 在本申请的背光模组中，所述光源为侧出光型光源，所述光源的出光面为所述光源的侧面，且所述光源的出光面与所述线路板垂直设置。
[0017] 在本申请的背光模组中，所述导光板包括一入光面，所述导光板的入光面与所述光源的出光面平行设置。
[0018] 在本申请的背光模组中，所述背光模组还包括设置在所述导光板与所述背板之间的反射层。
[0019] 在本申请的背光模组中，所述反射层凸出于所述导光板的入光面；
[0020] 其中，所述反射层包括反光区以及用以增强光线扩散的扩散区，所述扩散区设置在所述导光板的入光面处。
[0021] 在本申请的背光模组中，所述背光模组还包括设置在所述导光板与所述背板之间的扩散片，所述扩散片设置在所述导光板的入光面处。
[0022] 在本申请的背光模组中，所述导光板包括出光区以及非出光区，所述出光区设置在所述导光板靠近所述光源的一端；
[0023] 所述背光模组还包括遮光胶，所述遮光胶设置在所述线路板和所述导光板上，并覆盖所述导光板的非出光区。
[0024] 在本申请的背光模组中，所述线路板为柔性线路板。
[0025] 根据本申请的另一个方面，还提供了一种显示装置，包括显示模组以及背光模组，所述背光模组包括背板以及设置在所述背板内侧的胶框、导光板以及光源部；
[0026] 所述胶框设置在所述背板的内侧边缘，所述胶框具有一倾斜角度的第一表面；
[0027] 所述导光板设置在所述胶框的一侧；
[0028] 所述光源部包括线路板以及设置在所述线路板一侧表面的至少一个光源；
[0029] 所述线路板的第一端设置在所述第一表面上，所述线路板的第二端设置在所述导光板上；
[0030] 所述光源设置在所述胶框与所述导光板之间的空隙内；
[0031] 其中，所述线路板斜置在所述胶框和所述导光板上，所述线路板的第一端高于所述线路板的第二端。
[0032] 在本申请的显示装置中，所述第一表面的倾斜角与所述线路板的倾斜角度相同。
[0033] 在本申请的显示装置中，所述背光模组还包括胶带，所述线路板通过所述胶带固定在所述胶框与所述导光板上。
[0034] 在本申请的显示装置中，所述光源为侧出光型光源，所述光源的出光面为所述光源的侧面，且所述光源的出光面与所述线路板垂直设置。
[0035] 在本申请的显示装置中，所述导光板包括一入光面，所述导光板的入光面与所述光源的出光面平行设置。
[0036] 在本申请的显示装置中，所述背光模组还包括设置在所述导光板与所述背板之间的反射层。
[0037] 在本申请的显示装置中，所述反射层凸出于所述导光板的入光面；
[0038] 其中，所述反射层包括反光区以及用以增强光线扩散的扩散区，所述扩散区设置在所述导光板的入光面处。
[0039] 在本申请的显示装置中，所述背光模组还包括设置在所述导光板与所述背板之间的扩散片，所述扩散片设置在所述导光板的入光面处。
[0040] 在本申请的显示装置中，所述导光板包括出光区以及非出光区，所述出光区设置在所述导光板靠近所述光源的一端；
[0041] 所述背光模组还包括遮光胶，所述遮光胶设置在所述线路板和所述导光板上，并覆盖所述导光板的非出光区。
[0042] 在本申请的显示装置中，所述线路板为柔性线路板。
 有益效果
[0043] 有益效果：本申请通过将线路板斜置在背光模组中，以减少光源的混光距离及增大胶框与线路板的粘贴面积，提升背光模组的出光区域屏占比。
 附图说明
[0044] 为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
[0045] 图1为本申请第一实施例提供的背光模组的剖面图。
[0046] 本申请的实施方式
[0047] 以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
[0048] 本申请提供了一种背光模组及显示装置，以解决背光模组设置中光源混光距离较短，胶框和线路板粘结面积较小的问题。
[0049] 请参阅图1，图1为本申请第一实施例提供的背光模组100的剖面图。
[0050] 根据本申请的一个方面，提供了一种背光模组100，包括背板11以及设置在所述背板11内侧的胶框12、导光板14以及光源13。
[0051] 在一种实施例中，所述背板11包括构成容置空间的底壁部和侧壁部，所述导光板14、所述胶框12和所述光源13可以容置于容置空间内。
[0052] 在一种实施例中，所述背板11为金属背板11，优选散热效果较好的金属背板11更有利于实现背光模组100的散热。
[0053] 所述胶框12设置在所述背板11的内侧边缘，所述胶框12具有一倾斜的第一表面，所述第一表面的倾斜角度为β。
[0054] 在一种实施例中，所述胶框12设置在所述底壁部和侧壁部的交汇处。
[0055] 所述导光板14设置在所述胶框12的一侧，所述导光板14与所述胶框12设置在同一平面上，该平面为平行于所述背板11底壁处的平面。
[0056] 所述光源13包括线路板131以及设置在所述线路板131一侧表面的至少一个光源132。
[0057] 在一种实施例中，所述光源132包括LED灯。
[0058] 在一种实施例中，所述光源132为侧出光型光源，所述光源132的出光面为所述光源132的侧面，且所述光源132的出光面与所述线路板131垂直设置。
[0059] 在一种实施例中，为了降低由于光源132出光面角度发生变化导致光线能量的消耗，本申请设置所述导光板14的入光面与所述光源132的出光面平行设置。
[0060] 在一种实施例中，所述背光模组100还包括设置在所述导光板14与所述背板11之间的反光层15。
[0061] 在一种实施例中，所述反射层15凸出于所述导光板14的入光面；
[0062] 其中，所述反射层15包括反光区151以及用以增强光线扩散的扩散区152，所述扩散区152设置在所述导光板14的入光面处，用以将光线打散，提高入光侧光线均一性。
[0063] 在一种实施例中，所述背光模组100还包括设置在所述导光板14与所述背板11之间的扩散片，所述扩散片设置在所述导光板14的入光面处，用以将光线打散，提高入光侧光线均一性。
[0064] 所述光源132的顶面朝向背板11的底壁部。
[0065] 在一种实施例中，所述线路板131为条状的线路板131，例如：条状结构的FPC（Flexible Printed Circuit）线路板131或PCB (Printed Circuit Board)电路板。
[0066] 所述线路板131的第一端13a设置在所述第一表面上，所述线路板131的第二端13b设置在所述导光板14上，也可以理解为，所述线路板131通过所述第一端13a和所述第二端13b固定在所述胶框12和所述导光板14上。
[0067] 所述光源132设置在所述胶框12与所述导光板14之间的空隙内。
[0068] 其中，所述线路板131斜置在所述胶框12和所述导光板14上，所述线路板131的第一端13a高于所述线路板131的第二端13b。
[0069] 在现有的背光模组100中，胶框12与线路板131的接触面为平面。而在本申请中，胶框12与线路板131接触的第一表面为倾斜面，在加框表面宽度确定的情况下，倾斜面相较于平面能够使得胶框12与线路板131具有更多的接触面积，进而提升胶框12与线路板131的粘结度。
[0070] 例如：当所述第一表面的倾斜角度为β时，C为线路板131平置时线路板131与胶框12的粘贴长度，C1为线路板131斜置时线路板131与胶框12的粘贴长，C1=C/ cosβ，胶框12与线路板131的粘贴长度增加量为△C=C1-C=C1 *（1-cosβ）。
[0071] 背光模组100中透镜将光源132的光线经折射后射到扩散板上，且光源132通过透镜散射的光线均匀覆盖到扩散板上需要一段较长的混光距离。本申请通过将线路板131斜置在背光模组100内；相应的，光源132发出的光线角度也会发生改变。
[0072] 例如：L为线路板131平置时的混光距离，L1为线路板131斜置时LED混光距离，L1=L * cosβ灯条斜贴组装时LED混光距离减小量为△L=L-L1=L* （1-cosβ）。因此，本申请能够减小光源132的混光距离。
[0073] 在一种实施例中，所述第一表面的倾斜角与所述线路板131的倾斜角度相同。
[0074] 在一种实施例中，所述背光模组100还包括胶带16，所述线路板131通过所述胶带16固定在所述胶框12与所述导光板14上。
[0075] 在一种实施例中，所述导光板14包括出光区以及非出光区，所述出光区设置在所述导光板14靠近所述光源132的一端。
[0076] 所述背光模组100还包括遮光胶，所述遮光胶设置在所述线路板131和所述导光板14上，并覆盖所述导光板14的非出光区。
[0077] 本申请通过上述方案能够提升导光板14的出光区在背光模组100中的占比，提升背光模组100的出光效率。
[0078] 根据本申请的另一个方面，还提供了一种显示装置，包括显示面板和背光模组100，所述背光模组100包括背板11以及设置在所述背板11内侧的胶框12、导光板14以及光源13。
[0079] 所述胶框12设置在所述背板11的内侧边缘，所述胶框12具有一倾斜角度的第一表面；
[0080] 所述导光板14设置在所述胶框12的一侧；
[0081] 所述光源13包括线路板131以及设置在所述线路板131一侧表面的至少一个光源132；
[0082] 所述线路板131的第一端13a设置在所述第一表面上，所述线路板131的第二端13b设置在所述导光板14上；
[0083] 所述光源132设置在所述胶框12与所述导光板14之间的空隙内；
[0084] 其中，所述线路板131斜置在所述胶框12和所述导光板14上，所述线路板131的第一端13a高于所述线路板131的第二端13b。
[0085] 在一种实施例中，所述第一表面的倾斜角与所述线路板131的倾斜角度相同。
[0086] 在一种实施例中，所述背光模组100还包括胶带16，所述线路板131通过所述胶带16固定在所述胶框12与所述导光板14上。
[0087] 在一种实施例中，所述光源132为侧出光型光源132，所述光源132的出光面为所述光源132的侧面，且所述光源132的出光面与所述线路板131垂直设置。
[0088] 在一种实施例中，所述导光板14包括一入光面，所述导光板14的入光面与所述光源132的出光面平行设置。
[0089] 在一种实施例中，所述背光模组100还包括设置在所述导光板14与所述背板11之间的反射层15。
[0090] 在一种实施例中，所述反射层15凸出于所述导光板14的入光面；
[0091] 其中，所述反射层15包括反光区151以及用以增强光线扩散的扩散区152，所述扩散区152设置在所述导光板14的入光面处。
[0092] 在一种实施例中，所述背光模组100还包括设置在所述导光板14与所述背板11之间的扩散片，所述扩散片设置在所述导光板14的入光面处。
[0093] 在一种实施例中，所述导光板14包括出光区以及非出光区，所述出光区设置在所述导光板14靠近所述光源132的一端。
[0094] 所述背光模组100还包括遮光胶，所述遮光胶设置在所述线路板131和所述导光板14上，并覆盖所述导光板14的非出光区。
[0095] 有益效果：本申请通过将线路板斜置在背光模组中，以减少光源的混光距离及增大胶框与线路板的粘贴面积，提升背光模组的出光区域屏占比。
[0096] 综上所述，虽然本申请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申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种背光模组，其包括背板以及设置在所述背板内侧的胶框、导光板以及光源部；
    所述胶框设置在所述背板的内侧边缘，所述胶框具有一倾斜角度的第一表面；
    所述导光板设置在所述胶框的一侧；
    所述光源部包括线路板以及设置在所述线路板一侧表面的至少一个光源；
    所述线路板的第一端设置在所述第一表面上，所述线路板的第二端设置在所述导光板上；
    所述光源设置在所述胶框与所述导光板之间的空隙内；
    其中，所述线路板斜置在所述胶框和所述导光板上，所述线路板的第一端高于所述线路板的第二端。
  2. 根据权利要求1所述的背光模组，其中，所述第一表面的倾斜角与所述线路板的倾斜角度相同。
  3. 根据权利要求1所述的背光模组，其中，所述背光模组还包括胶带，所述线路板通过所述胶带固定在所述胶框与所述导光板上。
  4. 根据权利要求2所述的背光模组，其中，所述光源为侧出光型光源，所述光源的出光面为所述光源的侧面，且所述光源的出光面与所述线路板垂直设置。
  5. 根据权利要求4所述的背光模组，其中，所述导光板包括一入光面，所述导光板的入光面与所述光源的出光面平行设置。
  6. 根据权利要求5所述的背光模组，其中，所述背光模组还包括设置在所述导光板与所述背板之间的反射层。
  7. 根据权利要求6所述的背光模组，其中，所述反射层凸出于所述导光板的入光面；
    其中，所述反射层包括反光区以及用以增强光线扩散的扩散区，所述扩散区设置在所述导光板的入光面处。
  8. 根据权利要求5所述的背光模组，其中，所述背光模组还包括设置在所述导光板与所述背板之间的扩散片，所述扩散片设置在所述导光板的入光面处。
  9. 根据权利要求1所述的背光模组，其中，所述导光板包括出光区以及非出光区，所述出光区设置在所述导光板靠近所述光源的一端；
    所述背光模组还包括遮光胶，所述遮光胶设置在所述线路板和所述导光板上，并覆盖所述导光板的非出光区。
  10. 根据权利要求1所述的背光模组，其中，所述线路板为柔性线路板。
  11. 一种显示装置，其包括显示模组以及背光模组，所述背光模组包括背板以及设置在所述背板内侧的胶框、导光板以及光源部；
    所述胶框设置在所述背板的内侧边缘，所述胶框具有一倾斜角度的第一表面；
    所述导光板设置在所述胶框的一侧；
    所述光源部包括线路板以及设置在所述线路板一侧表面的至少一个光源；
    所述线路板的第一端设置在所述第一表面上，所述线路板的第二端设置在所述导光板上；
    所述光源设置在所述胶框与所述导光板之间的空隙内；
    其中，所述线路板斜置在所述胶框和所述导光板上，所述线路板的第一端高于所述线路板的第二端。
  12. 根据权利要求11所述的显示装置，其中，所述第一表面的倾斜角与所述线路板的倾斜角度相同。
  13. 根据权利要求11所述的显示装置，其中，所述背光模组还包括胶带，所述线路板通过所述胶带固定在所述胶框与所述导光板上。
  14. 根据权利要求12所述的显示装置，其中，所述光源为侧出光型光源，所述光源的出光面为所述光源的侧面，且所述光源的出光面与所述线路板垂直设置。
  15. 根据权利要求14所述的显示装置，其中，所述导光板包括一入光面，所述导光板的入光面与所述光源的出光面平行设置。
  16. 根据权利要求15所述的显示装置，其中，所述背光模组还包括设置在所述导光板与所述背板之间的反射层。
  17. 根据权利要求16所述的显示装置，其中，所述反射层凸出于所述导光板的入光面；
    其中，所述反射层包括反光区以及用以增强光线扩散的扩散区，所述扩散区设置在所述导光板的入光面处。
  18. 根据权利要求15所述的显示装置，其中，所述背光模组还包括设置在所述导光板与所述背板之间的扩散片，所述扩散片设置在所述导光板的入光面处。
  19. 根据权利要求11所述的显示装置，其中，所述导光板包括出光区以及非出光区，所述出光区设置在所述导光板靠近所述光源的一端；
    所述背光模组还包括遮光胶，所述遮光胶设置在所述线路板和所述导光板上，并覆盖所述导光板的非出光区。
  20. 根据权利要求11所述的显示装置，其中，所述线路板为柔性线路板。
PCT/CN2019/082599 2018-12-21 2019-04-15 背光模组及显示装置 WO2020124891A1 (zh)

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