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WO2020107897A1 - 一种背光模组及其显示装置 - Google Patents

一种背光模组及其显示装置 Download PDF

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Publication number
WO2020107897A1
WO2020107897A1 PCT/CN2019/096456 CN2019096456W WO2020107897A1 WO 2020107897 A1 WO2020107897 A1 WO 2020107897A1 CN 2019096456 W CN2019096456 W CN 2019096456W WO 2020107897 A1 WO2020107897 A1 WO 2020107897A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
light
disposed
backlight module
Prior art date
Application number
PCT/CN2019/096456
Other languages
English (en)
French (fr)
Inventor
周革革
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 US16/612,134 priority Critical patent/US20210341665A1/en
Publication of WO2020107897A1 publication Critical patent/WO2020107897A1/zh

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
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—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
    • G02F1/133615—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
    • G02B6/0015—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
    • G02B6/0021—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 for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • 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
    • G02B6/0033—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
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—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

Definitions

  • the invention relates to the field of display technology, in particular to a backlight module and a display device thereof.
  • the liquid crystal display is a passive light-emitting element, and the display screen itself does not emit light, but is illuminated by the backlight system below it.
  • the backlight and the liquid crystal display are combined to form a liquid crystal display module.
  • the LCD backlight is a flat uniform lighting device.
  • the cold cathode fluorescent tubes or LED strips as the light source are arranged on both sides or one side of the entire backlight (may be the long side or the short side).
  • the cold cathode tube is a linear light source, and the LED is a point light source.
  • the light guide plate is generally made of acrylic plastic with high light transmittance, and the surface is very smooth and flat, so that most of the internal light will be totally reflected regularly on its flat surface, and will not be emitted outside the light guide plate.
  • White dots are printed on the bottom of the light guide plate of the LCD. At the position where the light guide plate is printed with dots, the light is no longer totally reflected regularly but will be emitted above the light guide plate. Controlling the density of the dots at each location can control how much light the light guide plate emits at this location. Precisely designed light guide plate dots can spread the light incident on both sides evenly on the entire plane. Optical films will be placed above the light guide plate, these films play a uniform light, and gather large angle light for frontal observation.
  • the so-called backlight is a light source located behind the liquid crystal display (LCD), and its light-emitting effect will directly affect the visual effect of the liquid crystal display module (LCM).
  • the backlight is mainly composed of a light source, a light guide plate, an optical diaphragm, and a plastic frame.
  • the backlight has the characteristics of high brightness, long life and uniform light emission. According to the different distribution positions of light sources, they are divided into edge-lit backlights and direct-lit backlights.
  • Edge lighting is a single light source placed on the side.
  • the light guide plate adopts injection molding and non-printing design. It is usually used for small and medium-sized backlight modules under 30 inches. It has the characteristics of light weight, thinness, narrow frame and low power consumption. It is also a light source for mobile phones, tablet computers and notebook computers. There are also large-size TV backlight modules that use an edge-light structure.
  • the edge-lit structure can no longer have advantages in weight, power consumption, and brightness. Therefore, a direct-type backlight structure that does not include a light guide plate and the light source is placed directly below is developed .
  • the light source is emitted from a spontaneous light source (such as a lamp tube, LED, etc.), reflected by a reflective plate, and evenly dispersed upward through a diffuser plate and then emitted on the front side.
  • a spontaneous light source such as a lamp tube, LED, etc.
  • the lamp tube can use 2 to more lamps according to the size of the TFT panel But it also increases the thickness, weight, power consumption of the module, its advantages are high brightness, good light angle, high light utilization efficiency, simple structure, etc., so it is suitable for portability and space requirements Less critical LCD monitors and LCD TVs.
  • An object of the present invention is to provide a backlight module, which can solve the problems of the current backlight module through hole design, the brightness of the light guide plate after the through hole is dark, the uniformity of the entire surface brightness is low, and the optical taste is low.
  • the present invention provides a backlight module including a frame, a light guide plate, and a light source.
  • the frame is arranged around the light guide plate; the light source is arranged between the light guide plate and the frame, the light guide plate is provided with a through hole, and the rear of the through hole is far away from the light source
  • An outer convex portion is provided on the side plate of the light guide plate and/or an inner concave portion is provided on the side frame of the frame body away from the light source behind the through hole.
  • the surface shape of the convex portion includes a circular arc shape.
  • the shape of the concave portion corresponds to the shape of the convex portion.
  • the surface shape of the concave portion includes a circular arc shape.
  • the backlight module described therein further includes: a back plate, a reflective sheet and an optical film.
  • the reflection sheet is provided on the back plate
  • the light guide plate is provided on the reflection plate
  • the optical film is provided on the light guide plate.
  • the backlight module described therein further includes a light bar circuit board and light-shielding glue.
  • the light bar circuit board is connected to the light source, and the shading glue is provided on the light bar circuit board.
  • the optical film includes: a lower diffusion sheet, a prism sheet, and an upper diffusion sheet.
  • the lower diffusion sheet is disposed on the light guide plate; the prism sheet is disposed on the lower diffusion sheet; and the upper diffusion sheet is disposed on the prism sheet.
  • the light bar circuit board is connected to the frame body and the light guide plate through double-sided tape.
  • Another object of the present invention is to provide a display device including the backlight module according to the present invention.
  • the surface shape of the convex portion includes a circular arc shape.
  • the shape of the concave portion corresponds to the shape of the convex portion.
  • the surface shape of the concave portion includes a circular arc shape.
  • the backlight module described therein further includes: a back plate, a reflective sheet and an optical film.
  • the reflection sheet is provided on the back plate
  • the light guide plate is provided on the reflection plate
  • the optical film is provided on the light guide plate.
  • the backlight module described therein further includes a light bar circuit board and light-shielding glue.
  • the light bar circuit board is connected to the light source, and the shading glue is provided on the light bar circuit board.
  • the optical film includes: a lower diffusion sheet, a prism sheet, and an upper diffusion sheet.
  • the lower diffusion sheet is disposed on the light guide plate; the prism sheet is disposed on the lower diffusion sheet; and the upper diffusion sheet is disposed on the prism sheet.
  • the light bar circuit board is connected to the frame body and the light guide plate through double-sided tape
  • the invention relates to a backlight module and a display device thereof, which are provided with a convex part on the side plate of the light guide plate far away from the light source behind the through hole and/or away from the light source behind the through hole
  • the side frame of the frame body is provided with an inner concave portion, and this convex and concave design will form a shape similar to a concave mirror, so that the light emitted by the light source can be reflected multiple times at the design of the outer convex portion, so that more light reaches the Behind the through hole, the brightness of the light guide plate behind the through hole is further improved, thereby improving the uniformity of the brightness of the entire backlight module, improving the optical taste, and improving the customer experience.
  • FIG. 1 is a schematic structural diagram of a backlight module of the present invention.
  • FIG. 2 is a plan view of a light guide plate and a frame body according to Embodiment 1 of the present invention.
  • Embodiment 3 is a plan view of a light guide plate and a frame body according to Embodiment 2 of the present invention.
  • Embodiment 4 is a plan view of a light guide plate and a frame body according to Embodiment 3 of the present invention.
  • Light source Light source, light source, light source, light source, light source, light source, light source 6.
  • Light bar circuit board
  • the first side panel 22.
  • the first side frame 42.
  • the component When certain components are described as “on” another component, the component may be directly placed on the other component; there may also be an intermediate component, which is placed on the intermediate component , And the intermediate component is placed on another component.
  • the two When a component is described as “installed to” or “connected to” another component, the two can be understood to be “installed” or “connected” directly, or a component “installed to” or “connected to” through an intermediate component Another component.
  • the structure diagram of the backlight module of the present invention Including: back plate (not shown), reflective sheet 1, light guide plate 2, optical film 3, frame 4, light source 5, light bar circuit board 6 and shading glue 7.
  • the reflective sheet 1 is disposed on the back plate, and is mainly used to reflect the light exposed at the bottom of the light guide plate 2 back to the light guide plate 2 to improve the availability of light.
  • the light guide plate 2 is disposed on the reflective sheet 1.
  • the light guide plate 2 is provided with a through hole 23.
  • the light guide plate 2 includes a first side plate 21 and a second side plate 22 provided corresponding to the first side plate 21.
  • the second side plate 22 is a side plate of the light guide plate 2 far from the light source 5 behind the through hole 23.
  • the frame 4 is disposed around the light guide plate 2.
  • the frame 4 includes a first side frame 41 parallel to the first side plate 21 and a second side frame 42 parallel to the second side plate 22.
  • the second side frame 42 is a side frame away from the frame 4 of the light source 5 behind the through hole 23.
  • the light source 5 is disposed between the first side plate 21 and the first side frame 41.
  • the second side plate 22 of the light guide plate 2 behind the through hole 23 is provided with an outer convex portion 24.
  • the surface shape of the outer convex portion 24 is an arc shape, which passes through the second side plate
  • the arc-shaped convex portion 24 of 22 makes the light reflect multiple times at the design of the convex portion 24, so that more light reaches the rear of the through hole, improves the brightness of the light guide plate behind the through hole, and thus improves the overall backlight module. Brightness uniformity, improve optical taste, and improve customer experience satisfaction.
  • the optical film 3 is disposed on the light guide plate 2. Specifically, it includes: a lower diffusion sheet, a prism sheet, and an upper diffusion sheet.
  • the lower diffusion sheet is disposed on the light guide plate; the prism sheet is disposed on the lower diffusion sheet; the upper diffusion sheet is disposed on the prism sheet; and the light shielding sheet is disposed on the upper diffusion sheet.
  • there are many granular objects in the lower diffusion sheet and the upper diffusion sheet which can diffuse the light received by the light guide plate 2, so that the light can propagate toward the front direction of the display panel, widen the viewing angle, and concealedly form on the light guide plate 2
  • the prism sheet can concentrate the diffused light and emit it within a certain angle to achieve the purpose of improving the brightness of the display panel.
  • the light bar circuit board 6 is connected to the light source 5, and the light bar circuit board 6 is fixed on the frame body 4 and the light guide plate 2 through a double-sided adhesive 8.
  • the shading glue 7 is disposed on the light bar circuit board 6. Mainly for positioning the optical film 3 and shielding the side surface of the frame 4 of the display device.
  • an inner concave portion 43 is provided on the second side frame 42 of the frame 4 far away from the light source 5 behind the through hole 23,
  • the shape of the inner concave portion 43 may correspond to the shape of the outer convex portion 24.
  • the shape of the inner concave portion 43 is an arc shape.
  • the inner concave portion 43 on the frame 4 allows light to be designed in the inner concave portion 43 Multiple reflections at the place, so that more light reaches the back of the through hole, improves the brightness of the light guide plate behind the through hole, thereby improving the brightness uniformity of the entire backlight module, improving optical taste, and improving customer experience satisfaction.
  • an outer convex portion 24 is provided on the second side plate 22 of the light guide plate 2 far away from the light source 5 behind the through hole 23, and
  • the second side frame 42 of the frame 4 away from the light source 5 behind the through hole 23 is provided with an inner concave portion 43 corresponding to the outer convex portion 24.
  • the invention also provides a display device including the above backlight module. Since the backlight module has the same structure and the same technical effect, it will not be repeated here.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光模组及其显示装置，其中背光模组包括导光板（2）、框体（4）以及光源（5），框体（4）设置于导光板（2）周围；光源（5）设置于导光板（2）与框体（4）之间，导光板（2）上设置有一通孔（23），通孔（23）后方远离光源（5）的导光板（2）的侧板（22）上设有外凸部（24）和/或通孔（23）后方远离光源（5）的框体（4）的侧框（42）上设有内凹部（43）。

Description

一种背光模组及其显示装置 技术领域
本发明涉及显示技术领域，具体涉及一种背光模组及其显示装置。
 背景技术
随着液晶显示技术的不断发展，液晶显示器特别是彩色液晶显示器的应用领域也在不断拓宽。受液晶显示器的市场拉动，背光源产业，呈现一派繁荣景象。液晶显示是被动发光元件，显示屏本身并不发光，而是由其下方的背光系统照亮的。背光源和液晶显示屏组合在一起构成了液晶显示模块。液晶背光是一个平面的均匀照明装置，作为光源的冷阴极荧光灯管或LED灯条排列在整个背光源的两边或一边（可能是长边，也可能是短边）。冷阴极灯管是线光源，LED是点光源，把此光源转换为面光源需要使用导光板。导光板一般由高透光率的亚克力塑料制成，表面非常光滑平整，以致于大部分内部光线会在其平整表面上规则的全反射，而不会射出到导光板外部。液晶显示器的导光板的底部印有白色的网点。在导光板印有网点的位置上，光线不再规则的全反射而是会向导光板上方射出。控制每个位置网点的密度就可以控制导光板在这个位置射出光线的多少。精密设计的导光板网点可以让两侧入射的光线均匀的铺散在整个平面上。导光板上方会再放置光学膜片，这些膜片起到均匀光线，并且汇聚大角度光供正面观察等作用。
所谓背光源（BackLight）是位于液晶显示器（LCD）背后的一种光源，它的发光效果将直接影响到液晶显示模块（LCM）视觉效果。背光源主要由光源、导光板、光学用膜片、塑胶框等组成。背光源具有亮度高，寿命长、发光均匀等特点。依光源分布位置不同则分为侧光式背光源和直下式背光源。
侧光式背光源(Edge lighting)为摆在侧边之单支光源，导光板采射出成型无印刷式设计，一般常用于30寸以下中小尺寸的背光模组，其侧边入射的光源设计，拥有轻量、薄型、窄框化、低耗电的特色，亦为手机、平板电脑 、笔记型电脑的光源，亦有大尺寸电视背光模组采用侧光式结构。
对于(Bottom lighting)超大尺寸的背光模组，侧光式结构已经无法在重量、消费电力及亮度上占有优势，因此不含导光板且光源放置于正下方的直下式背光源结构便被发展出来。光源由自发性光源(例如灯管、LED等)射出藉由反射板反射后，向上经扩散板均匀分散后于正面射出，因安置空间变大，灯管可依TFT面板大小使用 2至多之灯管，但同时也增加了模组的厚度、重量、耗电量、其优点为高辉度、良好的出光视角、光利用效率高、结构简易化等，因而适用于对可携性及空间要求较不挑剔的LCD 显示器与LCD TV。
 技术问题
随着LCD模组不断向更亮、更轻、更薄方向发展，技术人员会在背光模组中开设一个通孔，用以放置摄像头。现有背光模组的通孔设计中，根据光线在导光板中的传播路线，导光板通孔后方的光线偏少，导致背光模组中通孔后亮度偏暗，导致整面亮度均匀性低，影响光学品味，客户体验差。因此需要寻求一种解决导光板通孔后亮度偏暗，整面亮度均匀性低，影响品味，客户体验差等问题的方法。
 技术解决方案
本发明的一个目的是提供一种背光模组，其能够解决目前背光模组的通孔设计中，导光板通孔后亮度偏暗、整面亮度均匀性低、光学品味低的问题。
为了解决上述问题，本发明提供一种背光模组，包括框体、导光板、以及光源。其中所述框体设置于所述导光板周围；所述光源设置于所述导光板与所述框体之间，所述导光板上设置有一通孔，所述通孔后方远离所述光源的导光板的侧板上设有外凸部和/或所述通孔后方远离所述光源的框体的侧框上设有内凹部。
进一步的，其中所述外凸部的表面形状包括圆弧形。
进一步的，其中所述内凹部的形状对应于所述外凸部的形状。
进一步的，其中所述内凹部的表面形状包括圆弧形。
进一步地，其中所述的背光模组，还包括：背板、反射片以及光学膜片。其中所述反射片设置于所述背板上，所述导光板设置于所述反射片上；所述光学膜片设置于所述导光板上。
进一步地，其中所述的背光模组，还包括灯条电路板和遮光胶。其中所述灯条电路板与所述光源相连，所述遮光胶设置于所述灯条电路板上。
进一步地，其中所述光学膜片包括：下扩散片、棱镜片以及上扩散片。所述下扩散片设置于所述导光板上；所述棱镜片设置于所述下扩散片上；所述上扩散片设置于所述棱镜片上。
进一步地，其中所述灯条电路板通过双面胶连接于所述框体和导光板上。
本发明的又一目的是提供一种显示装置，其包括本发明涉及的所述背光模组。
进一步的，其中所述外凸部的表面形状包括圆弧形。
进一步的，其中所述内凹部的形状对应于所述外凸部的形状。
进一步的，其中所述内凹部的表面形状包括圆弧形。
进一步地，其中所述的背光模组，还包括：背板、反射片以及光学膜片。其中所述反射片设置于所述背板上，所述导光板设置于所述反射片上；所述光学膜片设置于所述导光板上。
进一步地，其中所述的背光模组，还包括灯条电路板和遮光胶。其中所述灯条电路板与所述光源相连，所述遮光胶设置于所述灯条电路板上。
进一步地，其中所述光学膜片包括：下扩散片、棱镜片以及上扩散片。所述下扩散片设置于所述导光板上；所述棱镜片设置于所述下扩散片上；所述上扩散片设置于所述棱镜片上。
进一步地，其中所述灯条电路板通过双面胶连接于所述框体和导光板上
 有益效果
本发明涉及一种背光模组及其显示装置，其通过在所述通孔后方远离所述光源的导光板的侧板上设有外凸部和/或所述通孔后方远离所述光源的框体的侧框上设有内凹部，这种凸凹设计会形成类似于凹面镜的形状，如此使得光源发出的光线能够在外凸部设计处进行多次反射，从而使更多的光线到达所述通孔的后方，进而提高所述通孔后方的导光板亮度，从而提高整个背光模组的亮度均匀性，提高光学品味，提高客户体验。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，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。
图1是本发明背光模组的结构示意图。
图2是本发明实施例1的导光板及框体的俯视图。
图3是本发明实施例2的导光板及框体的俯视图。
图4是本发明实施例3的导光板及框体的俯视图。
图中部件标识如下：
1、反射片                        2、导光板
3、光学膜片                      4、框体
5、光源                          6、灯条电路板
7、遮光胶                        8、双面胶
21、第一侧板                     22、第二侧板
23、通孔                         24、外凸部
41、第一侧框                     42、第二侧框
43、内凹部
 本发明的实施方式
以下结合说明书附图详细说明本发明的优选实施例，以向本领域中的技术人员完整介绍本发明的技术内容，以举例证明本发明可以实施，使得本发明公开的技术内容更加清楚，使得本领域的技术人员更容易理解如何实施本发明。然而本发明可以通过许多不同形式的实施例来得以体现，本发明的保护范围并非仅限于文中提到的实施例，下文实施例的说明并非用来限制本发明的范围。
本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是附图中的方向，本文所使用的方向用语是用来解释和说明本发明，而不是用来限定本发明的保护范围。
在附图中，结构相同的部件以相同数字标号表示，各处结构或功能相似的组件以相似数字标号表示。此外，为了便于理解和描述，附图所示的每一组件的尺寸和厚度是任意示出的 ，本发明并没有限定每个组件的尺寸和厚度。
当某些组件，被描述为“在”另一组件“上”时，所述组件可以直接置于所述另一组件上；也可以存在一中间组件，所述组件置于所述中间组件上，且所述中间组件置于另一组件上。当一个组件被描述为“安装至”或“连接至”另一组件时，二者可以理解为直接“安装”或“连接”，或者一个组件通过一中间组件“安装至”或“连接至”另一个组件。
实施例1
如图1所示，本发明的背光模组结构示意图。其中包括：背板（图未示）、反射片1、导光板2、光学膜片3、框体4、光源5、灯条电路板6以及遮光胶7。
其中，所述反射片1设置于所述背板上，主要用于将导光板2底部露出的光反射回导光板2中，用来提高光线的可利用率。
如图1、图2所示，所述导光板2设置于所述反射片1上。所述导光板2上设有一通孔23。所述导光板2包括第一侧板21和对应于第一侧板21设置的第二侧板22。所述第二侧板22为所述通孔23后方远离所述光源5的导光板2的侧板。
如图1、图2所示，所述框体4设置于所述导光板2周围。所述框体4包括平行于第一侧板21的第一侧框41和平行于第二侧板22的第二侧框42。所述第二侧框42为所述通孔23后方远离所述光源5的框体4的侧框。所述光源5设置于所述第一侧板21和所述第一侧框41之间。
如图2所示，其中所述通孔23后方的导光板2的第二侧板22上设有外凸部24，所述外凸部24的表面形状为圆弧形，通过第二侧板22的圆弧形外凸部24，使光线在外凸部24设计处进行多次反射，从而使更多的光线到达通孔后方，提高通孔后方的导光板亮度，从而提高整个背光模组的亮度均匀性，提高光学品味，提高客户体验满意度。
其中，所述光学膜片3设置于所述导光板2上。具体的包括：下扩散片、棱镜片以及上扩散片。所述下扩散片设置于所述导光板上；所述棱镜片设置于所述下扩散片上；所述上扩散片设置于所述棱镜片上；所述遮光片设置于所述上扩散片上。其中下扩散片、上扩散片内有很多颗粒状的物体，可以将导光板2收到的光进行扩散，使光线能够向显示面板的正面方向传播，起到拓宽视角，隐蔽形成在导光板2上的图案的作用。棱镜片可以将扩散的光集中在一定角度内射出，以达到提高显示面板亮度的目的。
其中，所述灯条电路板6与所述光源5相连，所述灯条电路板6通过双面胶8固定于所述框体4和导光板2上。
其中，所述遮光胶7设置于所述灯条电路板6上。主要是用于定位光学膜片3并且进行显示装置的框体4的侧面遮光。
实施例2
如图3所述，本实施例与实施例1的区别在于：本实施例是在所述通孔23后方远离所述光源5的框体4的第二侧框42上设有内凹部43，所述内凹部43的形状可以对应于所述外凸部24的形状，所述内凹部43的形状为圆弧形，通过所述框体4上的内凹部43，使光线在内凹部43设计处进行多次反射，从而使更多的光线到达通孔后方，提高通孔后方的导光板亮度，从而提高整个背光模组的亮度均匀性，提高光学品味，提高客户体验满意度。
实施例3
如图4所示，本实施例与实施例1的区别在于：本实施例在所述通孔23后方远离所述光源5的导光板2的第二侧板22上设置外凸部24，并且在所述通孔23后方远离所述光源5的框体4的第二侧框42对应于外凸部24设置内凹部43。通过第二侧板22的圆弧外凸部24以及第二侧框42的圆弧内凹部43的设计，形成类似于凹面镜的形状，使光线在凹凸设计处进行多次反射，从而使更多的光线到达通孔后方，提高导光板通孔后方的亮度，从而提高整个背光模组的亮度均匀性，提高光学品味，提高客户体验满意度。
本发明还提供了一种显示装置，包括上述背光模组。由于所述背光模组结构相同，技术效果相同，因此在此不再赘述。
以上对本发明所提供的背光模组及其显示装置进行了详细介绍。应理解，本文所述的示例性实施方式应仅被认为是描述性的，用于帮助理解本发明的方法及其核心思想，而并不用于限制本发明。在每个示例性实施方式中对特征或方面的描述通常应被视作适用于其他示例性实施例中的类似特征或方面。尽管参考示例性实施例描述了本发明，但可建议所属领域的技术人员进行各种变化和更改。本发明意图涵盖所附权利要求书的范围内的这些变化和更改。
以上仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (16)

  1. 一种背光模组，其中包括：
    导光板，
    框体，所述框体设置于所述导光板周围；
    光源，所述光源设置于所述导光板与所述框体之间；
    所述导光板上设有一通孔；以及
    所述通孔后方远离所述光源的导光板的侧板上设有外凸部和/或所述通孔后方远离所述光源的框体的侧框上设有内凹部。
  2. 根据权利要求1所述的背光模组，其中所述外凸部的表面形状包括圆弧形。
  3. 根据权利要求1所述的背光模组，其中所述内凹部的形状对应于所述外凸部的形状。
  4. 根据权利要求3所述的背光模组，其中所述内凹部的表面形状包括圆弧形。
  5. 根据权利要求1所述的背光模组，其中还包括：
    背板；
    反射片，所述反射片设置于所述背板上，所述导光板设置于所述反射片上；以及
    光学膜片，所述光学膜片设置于所述导光板上。
  6. 根据权利要求1所述的背光模组，其中还包括：
    灯条电路板，所述灯条电路板与所述光源相连；
    遮光胶，所述遮光胶设置于所述灯条电路板上。
  7. 根据权利要求5所述的背光模组，其中所述光学膜片包括：
    下扩散片，所述下扩散片设置于所述导光板上；
    棱镜片，所述棱镜片设置于所述下扩散片上；以及
    上扩散片，所述上扩散片设置于所述棱镜片上。
  8. 根据权利要求6所述的背光模组，其中所述灯条电路板通过双面胶连接于所述框体和导光板上。
  9. 一种显示装置，其中包括：权利要求1所述的背光模组。
  10. 根据权利要求9所述的显示装置，其中所述外凸部的表面形状包括圆弧形。
  11. 根据权利要求9所述的显示装置，其中所述内凹部的形状对应于所述外凸部的形状。
  12. 根据权利要求11所述的显示装置，其中所述内凹部的表面形状包括圆弧形。
  13. 根据权利要求9所述的显示装置，其中还包括：
    背板；
    反射片，所述反射片设置于所述背板上，所述导光板设置于所述反射片上；以及
    光学膜片，所述光学膜片设置于所述导光板上。
  14. 根据权利要求9所述的显示装置，其中还包括：
    灯条电路板，所述灯条电路板与所述光源相连；
    遮光胶，所述遮光胶设置于所述灯条电路板上。
  15. 根据权利要求13所述的显示装置，其中所述光学膜片包括：
    下扩散片，所述下扩散片设置于所述导光板上；
    棱镜片，所述棱镜片设置于所述下扩散片上；以及
    上扩散片，所述上扩散片设置于所述棱镜片上。
  16. 根据权利要求14所述的显示装置，其中所述灯条电路板通过双面胶连接于所述框体和导光板上。
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