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WO2017031772A1 - 一种背光模组及显示面板 - Google Patents

一种背光模组及显示面板 Download PDF

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Publication number
WO2017031772A1
WO2017031772A1 PCT/CN2015/088377 CN2015088377W WO2017031772A1 WO 2017031772 A1 WO2017031772 A1 WO 2017031772A1 CN 2015088377 W CN2015088377 W CN 2015088377W WO 2017031772 A1 WO2017031772 A1 WO 2017031772A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
guide plate
quantum dot
backlight module
light guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/088377
Other languages
English (en)
French (fr)
Inventor
程艳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd, Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/896,895 priority Critical patent/US20170052304A1/en
Publication of WO2017031772A1 publication Critical patent/WO2017031772A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—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
    • G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight module and a display panel.
  • the backlight module is used to provide a backlight required for the liquid crystal display panel, which generally includes a white LED as a light source, and a light guide plate and an optical film; a liquid crystal display having the conventional backlight module
  • the panel has an NTSC color gamut of around 72%. In order to make the color of the display screen more natural and avoid distortion, the liquid crystal display panel needs to have a better performance effect and has a higher color gamut level.
  • the quantum dot material is applied to the backlight module, and the high-spectrum light source is used to replace the traditional white LED light source. Based on the quantum effect, the quantum dot material is irradiated by a high-spectrum light source. The spectrum of different wavelengths is excited, and the size of the quantum dot material can be adjusted to adjust the color of the synthesized light to achieve the backlight requirement of the high color gamut of the display panel, so that the NTSC color gamut of the liquid crystal display panel can be increased to 100%. Greatly enriched the performance of the LCD panel.
  • FIG. 1 is a schematic structural view of a first embodiment of a backlight module in the prior art, and the quantum dot tube in the backlight module 100.
  • 12 is disposed between the light guide plate 13 and the light source 11 and has an elliptical shape, and is fixedly supported by the bracket 14.
  • the backlight module 100 has a complicated structure, is cumbersome to assemble, and has low optical coupling efficiency.
  • 2 is a schematic structural view of a second embodiment of a backlight module in the prior art.
  • the quantum dot material in the backlight module 200 is applied to the surface of the sheet 22 above the light guide plate 21.
  • the quantum dot material coated on the edge thereof is easily oxidized by air and water to cause failure, and the arrangement of the sheet increases the thickness of the entire backlight module 200, so the backlight module is disadvantageous for narrow borders. And light and thin design.
  • the invention mainly solves the problems that the backlight module in the prior art has a complicated structure, is not easy to assemble, and is not conducive to thin and light design.
  • the present invention provides a backlight module including a light source, a quantum dot tube, and a light guide plate.
  • the light source is disposed on a side of the light guide plate, and the quantum dot tube is located between the light source and the light guide plate;
  • the light surface is recessed toward the inside of the light guide plate, so that one side of the quantum dot tube is embedded in the light guide plate, and the other side of the quantum dot tube abuts the light source;
  • the quantum dot tube is an elliptical cylinder, and the light entrance surface is matched with the elliptical cylinder.
  • the arc surface includes an assembly portion and a light guiding portion. The thickness of the assembly portion is greater than the thickness of the light guiding portion, and the light incident surface is disposed on the assembly portion, and the top surface of the light guiding portion is a light emitting surface.
  • the backlight module further includes a double-layer glue, the double-layer glue includes a reflective layer and a light absorbing layer, and the double-layer glue is disposed above the light source and the quantum dot tube, and the reflective layer faces the light source.
  • the present invention further provides a backlight module, which comprises a light source, a quantum dot tube and a light guide plate.
  • the light source is disposed on a side of the light guide plate, the quantum dot tube is located between the light source and the light guide plate; and the light guide plate is The light incident surface is recessed toward the inside of the light guide plate such that one side of the quantum dot tube is embedded in the light guide plate, and the other side of the quantum dot tube abuts the light source.
  • the light incident surface matches the outer surface of one side of the quantum dot tube.
  • the quantum dot tube is an elliptical cylindrical shape
  • the light incident surface is a curved surface matching the elliptical cylindrical shape
  • the light guide plate includes an assembly portion and a light guiding portion.
  • the thickness of the assembly portion is larger than the thickness of the light guiding portion, and the light incident surface is disposed on the assembly portion, and the top surface of the light guiding portion is a light emitting surface.
  • the backlight module further includes a double-layer glue, the double-layer glue includes a reflective layer and a light absorbing layer, and the double-layer glue is disposed above the light source and the quantum dot tube, and the reflective layer faces the light source.
  • the double-layer glue is connected to the assembly part and the light source of the light guide plate.
  • the backlight module further includes a reflective sheet disposed under the bottom surface of the light guide plate.
  • a plurality of light guiding microstructures are disposed on the light incident surface, so that the light entering the light guide plate from the light incident surface is evenly distributed.
  • the light guiding microstructure is an arc groove structure.
  • the present invention further provides a display panel.
  • the display panel includes a backlight module.
  • the backlight module includes a light source, a quantum dot tube, and a light guide plate.
  • the light source is disposed on a side of the light guide plate, and the quantum dot tube is located at the light source.
  • the light incident surface of the light guide plate is recessed toward the inside of the light guide plate, so that one side of the quantum dot tube is embedded in the light guide plate, and the other side of the quantum dot tube abuts the light source.
  • the light incident surface matches the outer surface of one side of the quantum dot tube.
  • the quantum dot tube is an elliptical cylindrical shape
  • the light incident surface is a curved surface matching the elliptical cylindrical shape
  • the light guide plate includes an assembly portion and a light guiding portion.
  • the thickness of the assembly portion is larger than the thickness of the light guiding portion, and the light incident surface is disposed on the assembly portion, and the top surface of the light guiding portion is a light emitting surface.
  • the backlight module further includes a double-layer glue, the double-layer glue includes a reflective layer and a light absorbing layer, and the double-layer glue is disposed above the light source and the quantum dot tube, and the reflective layer faces the light source.
  • the double-layer glue is connected to the assembly part and the light source of the light guide plate.
  • the backlight module further includes a reflective sheet disposed under the bottom surface of the light guide plate.
  • a plurality of light guiding microstructures are disposed on the light incident surface, so that the light entering the light guide plate from the light incident surface is evenly distributed.
  • the light guiding microstructure is an arc groove structure.
  • the backlight module of the present invention comprises a light source, a quantum dot tube and a light guide plate, the light source is disposed on a side of the light guide plate, and the quantum dot tube is located between the light source and the light guide plate;
  • the light incident surface of the light plate is recessed toward the inside of the light guide plate such that one side of the quantum dot tube is embedded in the light guide plate, and the other side of the quantum dot tube abuts the light source.
  • the quantum dot tube side of the backlight module of the invention is embedded in the light guide plate, and the light guide plate has a certain fixing effect on the quantum dot tube, and does not need a special bracket to fix the quantum dot tube, has a simple structure, is convenient for assembly, and is beneficial to the same. Lightweight design.
  • FIG. 1 is a schematic structural view of a first embodiment of a backlight module in the prior art
  • FIG. 2 is a schematic structural view of a second embodiment of a backlight module in the prior art
  • FIG. 3 is a schematic structural view of a first embodiment of a backlight module of the present invention.
  • FIG. 4 is a top plan view of the first embodiment of the backlight module shown in FIG. 3;
  • FIG. 5 is a schematic view showing two ways in which a quantum dot tube is embedded in a light guide plate in the backlight module shown in FIG. 3;
  • FIG. 6 is a schematic structural view of a light guiding microstructure of a light guide surface of a light guide plate in the backlight module shown in FIG. 3;
  • Fig. 7 is a schematic structural view of a first embodiment of a display panel of the present invention.
  • FIG. 3 is a schematic structural view of a first embodiment of the backlight module of the present invention
  • FIG. 4 is a top view of the first embodiment of the backlight module of FIG.
  • the backlight module 300 in the present embodiment includes a light source 31, a quantum dot tube 32, and a light guide plate 33.
  • the light source 31 is disposed on a side of the light guide plate 33, and the quantum dot tube 32 is located between the light source 31 and the light guide plate 33.
  • the process of implementing the backlight of the high color gamut display panel in the backlight module 300 is as follows: the high frequency light emitted by the light source 31 enters the quantum dot tube 32; the quantum dot material excited therein generates light of different wavelengths, and the size of the quantum dot material is adjusted. To adjust the color of the synthesized light, the synthesized light enters the light guide plate 33 and is uniformly emitted.
  • the light source 31 selects a blue LED, and the red light quantum dot material and the green light quantum dot material respectively generate pure red light and green light under the excitation of high frequency blue light, and then the blue, red, and green primary colors are blended. It can achieve a wider color gamut than traditional white LEDs.
  • the light source 31 can also use ultraviolet LEDs to excite the blue quantum dot material, the red light quantum dot material, and the green light quantum dot material to generate three primary colors of light, respectively.
  • the following description of the light source 31 is exemplified by a blue LED, but the selection of the light source 31 is not limited to the blue LED.
  • the light emitted from the quantum dot tube 32 enters the light guide plate 33 from the light incident surface 331 of the light guide plate 33.
  • the light incident surface 331 of the light guide plate 33 of the present embodiment is recessed toward the inside of the light guide plate 33 such that one side of the quantum dot tube 32 is fitted into the light guide plate 33, and the other side thereof abuts against the light source 31.
  • the quantum dot tube 32 is embedded in the light guide plate 33 to achieve multi-point contact or surface contact, the other side is in contact with the light source 31, and the light guide plate 33 and the light source 31 are fixed in position, so that the quantum dot tube 32 can be stably located at the light source 31 and the guide. Between the light panels 33.
  • One side of the quantum dot tube 32 is embedded in the light guide plate 33 to achieve multi-point contact or surface contact with the light-incident surface 331 of the light guide plate 33.
  • FIG. 5 is a quantum dot tube embedded in the backlight module shown in FIG. Schematic diagram of two ways of the light guide plate.
  • part b represents the way of surface contact, both of which can stably fix the quantum dot tube 32 between the light source 31 and the light guide plate 33; and in the manner in which the b part is in surface contact, the quantum dot tube There is no gap between the 32 and the light incident surface 331, and the generated light can be directly incident on the light guide plate 33, so that the quantum dot tube 32 and the light guide plate 33 have high coupling efficiency.
  • the light incident surface 331 is matched with the outer surface of one side of the quantum dot tube 32, so that the quantum dot tube 32 is embedded in the light guide plate 33 in a surface contact manner, and the quantum dot tube 32 is attached to the light guide plate 33.
  • the smooth surface 331 stabilizes the state of the quantum dot tube 32 while improving the coupling efficiency between the quantum dot tube 32 and the light guide plate 33.
  • the quantum dot tube 32 is formed into an elliptical cylinder, and the corresponding light guide surface 33 of the light guide plate 33 is a curved surface matching the elliptical cylinder.
  • the light guide plate 33 includes an assembly portion 332 and a light guiding portion 333.
  • the light incident surface 331 is disposed on the assembly portion 332, and the assembly portion 332 is assembled with the quantum dot tube 32, so that the quantum dot tube 32 can be embedded.
  • the light guiding portion 333 is configured to uniformly emit the light incident from the light incident surface 331 by the light emitting surface 334, the light emitting surface 334 is the top surface of the light guiding portion 333, and the assembly portion 332 is not used for light output.
  • the backlight module 300 is applied to a liquid crystal panel, the optical film is assembled on the light-emitting surface 334.
  • the assembly portion 332 Since the assembly portion 332 needs to embed the quantum dot tube 32 therein, the assembly portion 332 has a certain thickness, and the light guiding portion 333 does not need to have the same thickness as the assembly portion 332. Based on the consideration of slim design, the light guiding portion 333 is The thickness is smaller than the thickness of the assembly portion 332.
  • the assembly portion 332 and the light guiding portion 333 are separately described above for convenience of description. In fact, the assembly portion 332 and the light guiding portion 333 are two portions of the entire light guiding plate 33, and the direction of the light in the light guiding plate 33 is not distinguished. The assembly portion 332 and the light guiding portion 333.
  • a double-layer glue 34 is disposed above the light source 31 and the quantum dot tube 32, and the double-layer adhesive 34 includes reflective The layer 341 and the light absorbing layer 342, the light reflecting layer 341 faces the light source 11.
  • the reflective layer 341 is generally a white reflective material that reflects light back to the quantum dot tube 32.
  • the light absorbing layer 342 is generally a black light absorbing material to prevent light leakage from the light source 31.
  • the double-layer adhesive 34 is a deformable material, and therefore is closely attached to both of the light source 31 and the quantum dot tube 32 in accordance with the shape thereof.
  • the double-layer adhesive is further covered on the assembly portion 332 because light leakage may occur above the assembly portion 332. Since the thickness of the assembly portion 332 is larger than the thickness of the light guiding portion 333, a step is formed between the two. After the optical film is placed on the light emitting surface 334, the double layer adhesive 34 can be covered to the optical path along the step. The edge of the diaphragm. At this time, the double-layered glue 34 connects the light source 31 and the assembly portion 332 of the light guiding portion 33, and has a certain fixing effect on both.
  • the double layer glue 34 in Fig. 4 is not covered to the light source 31. This illustration is only for better description of the arrangement of the light source 31, i.e., substantially the double layer glue 34 is overlaid on the light source 31.
  • the distance between each of the blue LEDs in Figure 4 is b.
  • a reflection sheet 35 for reflecting light back to the light guide plate 33 is further provided below the bottom surface of the light guide plate 33.
  • the reflection sheet 35 is also disposed under the light source 31 and the quantum dot tube 32, and has a certain reflection effect on the light emitted from the light source 31 and the quantum dot tube 32.
  • the light source 31 in this embodiment is a blue LED. Considering the price and power consumption of the blue LED, the number of the blue LEDs is small, and the spacing between the corresponding blue LEDs is increased.
  • the blue LED is generally a sphere, the light emitted from the center thereof is more intense, and the light emitted from both sides is less weak, so when the distance between the blue LEDs is relatively small.
  • the hotspot phenomenon When it is large, there will be a phenomenon of light and dark between the light-incident parts of the display panel frame, that is, the hotspot phenomenon.
  • a plurality of light guiding microstructures 335 are disposed on the light incident surface 331 such that the light entering the light guiding plate 33 from the light incident surface 331 is evenly distributed. That is, the incident angle of the light entering the light guide plate 33 is expanded, thereby reducing the existence of the dark region and making the light distribution more uniform in the direction.
  • FIG. 6 is a schematic structural view of the light guiding surface of the light guide plate of the backlight module shown in FIG. 3, and the light guiding microstructure 335 is an arc groove structure. And the light guiding microstructure is used to uniformly diverge the light emitted by the blue LED, so the light guiding microstructure 335 is disposed corresponding to each blue LED, that is, the distance d between the light guiding microstructures is the distance b between each blue LED.
  • the backlight module of the embodiment includes a light source, a quantum dot tube and a light guide plate.
  • the light source is disposed on a side of the light guide plate, and the quantum dot tube is located between the light source and the light guide plate; the light incident surface of the light guide plate is facing The inside of the light guide plate is recessed so that one side of the quantum dot tube is embedded in the light guide plate, and the other side of the quantum dot tube abuts the light source.
  • the quantum dot tube side of the backlight module of the invention is embedded in the light guide plate, and the light guide plate has a certain fixing effect on the quantum dot tube, and does not need a special bracket to fix the quantum dot tube, has a simple structure, is convenient for assembly, and is beneficial to the same. Lightweight design.
  • FIG. 7 is a schematic structural diagram of a first embodiment of a display panel.
  • the display panel 700 can be used for a large display device, such as a large-screen TV, and can also be used for a small-sized display device, such as a mobile phone. Smart watches, etc. It includes a backlight module 71 and an optical film 72.
  • the backlight module 71 includes a light source 711, a quantum dot tube 712, a light guide plate 713, a double layer glue 714, and a reflection sheet 715, wherein the double layer glue 714 covers the edge of the optical film sheet 72.
  • the structure of the backlight module 71 is similar to that of the backlight module 300 described above, and details are not described herein.
  • the quantum dot tube is used in the display panel of the embodiment, so that the display panel has a 100% NTSC color gamut, which has rich performance effects, and the quantum dot tube in the display panel has a simple structure and is convenient for assembly, and The structure facilitates the slim design of the display panel.

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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)
  • Liquid Crystal (AREA)

Abstract

一种背光模组及显示面板，其中背光模组(300)包括光源(31)、量子点管(32)以及导光板(33)，光源(31)设置于导光板(33)的侧边，量子点管(32)位于光源(31)和导光板(33)之间，导光板(33)的入光面(331)呈朝向导光板(33)内部凹陷设置，使得量子点管(32)的一侧嵌入导光板(33)，量子点管(32)的另一侧抵接光源(31)。该背光模组(300)结构简单，便于组装，且利于其轻薄化设计。

Description

一种背光模组及显示面板
【技术领域】
本发明涉及显示技术领域，特别涉及一种背光模组及显示面板。
【背景技术】
在现有的液晶显示面板中，背光模组用于提供液晶显示面板所需要的背光，其通常包括作为光源的白光LED，以及导光板和光学膜片；具有这种常规背光模组的液晶显示面板，其NTSC色域在72%左右。为了使显示画面的色彩更加自然，避免失真，需要液晶显示面板有更好的表现效果，具有更高的色域水平。
基于以上目标，量子点背光源的技术应运而生，将量子点材料应用于背光模组中，采用高频谱光源代替传统的白光LED光源，基于量子效应，量子点材料在高频谱光源的照射下，激发出不同波长的光谱，通过调整量子点材料的尺寸大小，即可调节合成光的颜色，达到实现显示面板高色域的背光要求，使液晶显示面板的NTSC色域能够提高到100%，极大的丰富了液晶显示面板的表现能力。
当前量子点背光模组的封装模式主要有两种，第一种如图1所示，图1是现有技术中背光模组第一实施方式的结构示意图，背光模组100中的量子点管12设置于导光板13及光源11之间，为椭圆形，通过支架14实现固定支撑。该背光模组100结构复杂，组装麻烦，且光耦合效率低。第二种如图2所示，图2是现有技术中背光模组第二实施方式的结构示意图，背光模组200中量子点材料被涂抹在导光板21上方的片材22表面。在制作片材22时，其边缘涂抹的量子点材料容易与空气、水发生氧化反应造成失效，且片材的设置增大整个背光模组200的厚度，因此该背光模组不利于进行窄边框及轻薄化设计。
【发明内容】
本发明主要解决现有技术中的背光模组结构复杂、不易组装且不利于轻薄化设计的问题。
为解决上述技术问题，本发明提出一种背光模组，其包括光源、量子点管以及导光板，光源设置于导光板的侧边，量子点管位于光源和导光板之间；导光板的入光面呈朝向导光板内部凹陷设置，使得量子点管的一侧嵌入导光板，量子点管的另一侧抵接光源；量子点管为椭圆柱形，入光面为与椭圆柱形匹配的弧面；导光板包括组装部和导光部，组装部的厚度大于导光部的厚度，入光面设置于组装部上，导光部的顶面为出光面。
其中，背光模组进一步包括双层胶，双层胶包括反光层和吸光层，双层胶设置于光源和量子点管上方，且反光层朝向光源。
为解决上述技术问题，本发明又提出一种背光模组，其包括光源、量子点管以及导光板，光源设置于导光板的侧边，量子点管位于光源和导光板之间；导光板的入光面呈朝向导光板内部凹陷设置，使得量子点管的一侧嵌入导光板，量子点管的另一侧抵接光源。
其中，入光面与量子点管的一侧的外表面匹配。
其中，量子点管为椭圆柱形，入光面为与椭圆柱形匹配的弧面。
其中，导光板包括组装部和导光部，组装部的厚度大于导光部的厚度，入光面设置于组装部上，导光部的顶面为出光面。
其中，背光模组进一步包括双层胶，双层胶包括反光层和吸光层，双层胶设置于光源和量子点管上方，且反光层朝向光源。
其中，双层胶连接导光板的组装部和光源。
其中，背光模组进一步包括反射片，反射片设置于导光板的底面下方。
其中，入光面上设置有多个导光微结构，使得由入光面进入导光板的光线均匀分布。
其中，导光微结构为弧形凹槽结构。
为解决上述技术问题，本发明还提出一种显示面板，该显示面板包括背光模组，背光模组包括光源、量子点管以及导光板，光源设置于导光板的侧边，量子点管位于光源和导光板之间；导光板的入光面呈朝向导光板内部凹陷设置，使得量子点管的一侧嵌入导光板，量子点管的另一侧抵接光源。
其中，入光面与量子点管的一侧的外表面匹配。
其中，量子点管为椭圆柱形，入光面为与椭圆柱形匹配的弧面。
其中，导光板包括组装部和导光部，组装部的厚度大于导光部的厚度，入光面设置于组装部上，导光部的顶面为出光面。
其中，背光模组进一步包括双层胶，双层胶包括反光层和吸光层，双层胶设置于光源和量子点管上方，且反光层朝向光源。
其中，双层胶连接导光板的组装部和光源。
其中，背光模组进一步包括反射片，反射片设置于导光板的底面下方。
其中，入光面上设置有多个导光微结构，使得由入光面进入导光板的光线均匀分布。
其中，导光微结构为弧形凹槽结构。
本发明的有益效果是：区别于现有技术，本发明中背光模组包括光源、量子点管以及导光板，光源设置于导光板的侧边，量子点管位于光源和导光板之间；导光板的入光面呈朝向导光板内部凹陷设置，使得量子点管的一侧嵌入导光板，量子点管的另一侧抵接光源。本发明背光模组中的量子点管一侧嵌入导光板中，导光板对量子点管有一定的固定作用，不需要专门的支架对量子点管进行固定，结构简单，利于组装，并且利于其轻薄化设计。
【附图说明】
图1是现有技术中背光模组第一实施方式的结构示意图；
图2是现有技术中背光模组第二实施方式的结构示意图；
图3是本发明背光模组第一实施方式的结构示意图；
图4是图3所示背光模组第一实施方式的俯视图；
图5是图3所示背光模组中量子点管嵌入导光板两种方式的示意图；
图6是图3所示背光模组中导光板入光面导光微结构的结构示意图；
图7是本发明显示面板第一实施方式的结构示意图。
【具体实施方式】
参阅图3及图4，图3是本发明背光模组第一实施方式的结构示意图，图4是图3所示背光模组第一实施方式的俯视图。本实施方式中的背光模组300包括光源31、量子点管32以及导光板33，光源31设置于导光板33的侧边，量子点管32位于光源31和导光板33之间。
背光模组300中实现高色域显示面板背光要求的过程为：光源31发出的高频光线进入量子点管32；激发其中的量子点材料产生不同波长的光线，通过调整量子点材料的尺寸大小，来调节合成光的颜色，合成光进入导光板33后均匀射出。
本实施方式中，光源31选择蓝光LED，红光量子点材料及绿光量子点材料分别在高频蓝光的激发下产生纯正的红光和绿光，然后对蓝光、红光、绿光三原色光进行调配，即能实现比传统的白光LED更广的色域。其他实施方式中，光源31也可采用紫外LED，激发蓝光量子点材料、红光量子点材料以及绿光量子点材料分别产生三原色光。以下对于光源31的描述均以蓝光LED为例，但对于光源31的选择并不仅限于蓝光LED。
上述过程中，量子点管32发出的光线由导光板33的入光面331进入导光板33。本实施方式的导光板33的入光面331朝向导光板33内部凹陷设置，使得量子点管32的一侧嵌入导光板33，其另一侧则抵接于光源31。
量子点管32一侧嵌入导光板33实现多点接触或面接触，另一侧抵接于光源31，并且导光板33及光源31位置固定，因此量子点管32能够稳定的位于光源31与导光板33之间。
量子点管32的一侧嵌入导光板33，与导光板33的入光面331实现多点接触或面接触，具体请参阅图5，图5是图3所示背光模组中量子点管嵌入导光板两种方式的示意图。其中a部分表示多点接触的方式，b部分表示面接触的方式，均能够使量子点管32稳定的固定于光源31与导光板33之间；而b部分面接触的方式中，量子点管32与入光面331之间没有空隙，其产生的光线能够直接射入导光板33，因此量子点管32与导光板33之间具有较高的耦合效率。
本实施方式中，入光面331与量子点管32的一侧的外表面匹配，使得量子点管32以面接触的方式嵌入导光板33中，量子点管32贴合于导光板33的入光面331，使量子点管32状态稳固，同时提高了量子点管32与导光板33之间的耦合效率。
在实际生产中，为方便量产应用，将量子点管32制作为椭圆柱形，相应的导光板33入光面331则为与椭圆柱形匹配的弧面。
本实施方式中，导光板33包括组装部332和导光部333，入光面331设置在组装部332上，组装部332用于与量子点管32组装，因此其能使量子点管32嵌入其中；而导光部333用于使由入光面331射入的光线由出光面334均匀射出，出光面334为导光部333的顶面，且组装部332并不用于出光，因此在该背光模组300应用于液晶面板时，将光学膜片组装在出光面334上。
由于组装部332需要使量子点管32嵌入其中，因此组装部332具有一定的厚度，而导光部333并不需要与组装部332有相同厚度，基于轻薄化设计的考虑，导光部333的厚度小于组装部332的厚度。
以上对组装部332及导光部333分开描述只是为了描述方便，实际上组装部332与导光部333是一个整体导光板33中的两个部分，光线在导光板33中的走向并未区分组装部332和导光部333。
在背光模组的设计中，光的利用率一直是关注重点，本实施方式背光模组300中，在光源31和量子点管32上方还设置有双层胶34，该双层胶34包括反光层341和吸光层342，反光层341朝向光源11。
反光层341一般为白色反光材质，可将光线反射回量子点管32，而吸光层342一般为黑色吸光材质，可防止光源31出现漏光。双层胶34为可变形材料，因此依据光源31及量子点管32的形状紧贴在两者上方。
由于组装部332上方也有可能出现漏光情况，因此本实施方式中双层胶进一步覆盖在组装部332上。由于组装部332厚度大于导光部333厚度，因此两者之间形成有台阶，在制备液晶面板时，将光学膜片置于出光面334上后，双层胶34可沿着台阶覆盖至光学膜片的边缘。此时双层胶34连接光源31以及导光部33的组装部332，对于两者有一定的固定作用。
图4中双层胶34并未覆盖至光源31，该图示只是为了更好的描述光源31的排列，即实质上双层胶34是覆盖在光源31上。图4中每个蓝光LED之间的距离为b。
同样为提高光的利用率，在导光板33的底面下方进一步设置有反射片35，用于将光线反射回导光板33。反射片35还设置在光源31及量子点管32下方，对于自光源31及量子点管32射出的光也有一定的反射作用。
本实施方式中的光源31为蓝光LED，考虑到蓝光LED的价格及能耗问题，该蓝光LED的颗数较少，相应的蓝光LED之间的间距增大。在将此背光模组300应用到显示面板中时，由于蓝光LED一般为球体，由其中心射出的光线较多较强，两侧射出的光线较少较弱，因此当蓝光LED之间间距较大时，显示面板边框的入光部位会出现明暗相间的现象，即hotspot现象。
为了消除该现象，本实施方式中在入光面331上设置多个导光微结构335，使得由入光面331进入导光板33的光线均匀分布。即扩展光线进入导光板33的入射角，从而减少暗区的存在，使光线在方向上分布的更为均匀。
具体请参阅图6，图6是图3所示背光模组中导光板入光面导光微结构的结构示意图，该导光微结构335为弧形凹槽结构。且导光微结构用于使蓝光LED射出的光均匀发散，因此导光微结构335对应每个蓝光LED设置，即导光微结构之间的距离d为每个蓝光LED之间的距离b。
区别于现有技术，本实施方式背光模组包括光源、量子点管以及导光板，光源设置于导光板的侧边，量子点管位于光源和导光板之间；导光板的入光面呈朝向导光板内部凹陷设置，使得量子点管的一侧嵌入导光板，量子点管的另一侧抵接光源。本发明背光模组中的量子点管一侧嵌入导光板中，导光板对量子点管有一定的固定作用，不需要专门的支架对量子点管进行固定，结构简单，利于组装，并且利于其轻薄化设计。
请参阅图7，图7是显示面板第一实施方式的结构示意图，本实施方式显示面板700可以用于大型的显示设备，如大屏电视等；也可用于小尺寸的显示设备，如手机，智能手表等。其包括背光模组71，光学膜片72。
背光模组71包括光源711、量子点管712、导光板713、双层胶714以及反射片715，其中双层胶714覆盖至光学膜片72的边缘。
背光模组71的结构与上述背光模组300类似，具体不再赘述。
区别于现有技术，本实施方式显示面板中使用了量子点管，使得显示面板具有100%NTSC色域，具有丰富的表现效果，且显示面板中的量子点管结构简单、利于组装，且其结构利于显示面板的轻薄化设计。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种背光模组，其中，所述背光模组包括光源、量子点管以及导光板，所述光源设置于所述导光板的侧边，所述量子点管位于所述光源和所述导光板之间；所述导光板的入光面呈朝向所述导光板内部凹陷设置，使得所述量子点管的一侧嵌入所述导光板，所述量子点管的另一侧抵接所述光源；所述量子点管为椭圆柱形，所述入光面为与所述椭圆柱形匹配的弧面；所述导光板包括组装部和导光部，所述组装部的厚度大于所述导光部的厚度，所述入光面设置于所述组装部上，所述导光部的顶面为出光面。
  2. 根据权利要求1所述的背光模组，其中，所述背光模组进一步包括双层胶，所述双层胶包括反光层和吸光层，所述双层胶设置于所述光源和所述量子点管上方，且所述反光层朝向所述光源。
  3. 一种背光模组，其中，所述背光模组包括光源、量子点管以及导光板，所述光源设置于所述导光板的侧边，所述量子点管位于所述光源和所述导光板之间；所述导光板的入光面呈朝向所述导光板内部凹陷设置，使得所述量子点管的一侧嵌入所述导光板，所述量子点管的另一侧抵接所述光源。
  4. 根据权利要求3所述的背光模组，其中，所述入光面与所述量子点管的一侧的外表面匹配。
  5. 根据权利要求4所述的背光模组，其中，所述量子点管为椭圆柱形，所述入光面为与所述椭圆柱形匹配的弧面。
  6. 根据权利要求4所述的背光模组，其中，所述导光板包括组装部和导光部，所述组装部的厚度大于所述导光部的厚度，所述入光面设置于所述组装部上，所述导光部的顶面为出光面。
  7. 根据权利要求6所述的背光模组，其中，所述背光模组进一步包括双层胶，所述双层胶包括反光层和吸光层，所述双层胶设置于所述光源和所述量子点管上方，且所述反光层朝向所述光源。
  8. 根据权利要求7所述的背光模组，其中，所述双层胶连接所述导光板的组装部和所述光源。
  9. 根据权利要求3所述的背光模组，其中，所述背光模组进一步包括反射片，所述反射片设置于所述导光板的底面下方。
  10. 根据权利要求3所述的背光模组，其中，所述入光面上设置有多个导光微结构，使得由所述入光面进入所述导光板的光线均匀分布。
  11. 根据权利要求10所述的背光模组，其中，所述导光微结构为弧形凹槽结构。
  12. 一种显示面板，其中，所述显示面板包括背光模组，所述背光模组包括光源、量子点管以及导光板，所述光源设置于所述导光板的侧边，所述量子点管位于所述光源和所述导光板之间；所述导光板的入光面呈朝向所述导光板内部凹陷设置，使得所述量子点管的一侧嵌入所述导光板，所述量子点管的另一侧抵接所述光源。
  13. 根据权利要求12所述的显示面板，其中，所述入光面与所述量子点管的一侧的外表面匹配。
  14. 根据权利要求13所述的显示面板，其中，所述量子点管为椭圆柱形，所述入光面为与所述椭圆柱形匹配的弧面。
  15. 根据权利要求13所述的显示面板，其中，所述导光板包括组装部和导光部，所述组装部的厚度大于所述导光部的厚度，所述入光面设置于所述组装部上，所述导光部的顶面为出光面。
  16. 根据权利要求15所述的显示面板，其中，所述背光模组进一步包括双层胶，所述双层胶包括反光层和吸光层，所述双层胶设置于所述光源和所述量子点管上方，且所述反光层朝向所述光源。
  17. 根据权利要求16所述的显示面板，其中，所述双层胶连接所述导光板的组装部和所述光源。
  18. 根据权利要求12所述的显示面板，其中，所述背光模组进一步包括反射片，所述反射片设置于所述导光板的底面下方。
  19. 根据权利要求12所述的显示面板，其中，所述入光面上设置有多个导光微结构，使得由所述入光面进入所述导光板的光线均匀分布。
  20. 根据权利要求19所述的显示面板，其中，所述导光微结构为弧形凹槽结构。
PCT/CN2015/088377 2015-08-21 2015-08-28 一种背光模组及显示面板 Ceased WO2017031772A1 (zh)

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