WO2020186566A1 - 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
WO2020186566A1
WO2020186566A1 PCT/CN2019/081582 CN2019081582W WO2020186566A1 WO 2020186566 A1 WO2020186566 A1 WO 2020186566A1 CN 2019081582 W CN2019081582 W CN 2019081582W WO 2020186566 A1 WO2020186566 A1 WO 2020186566A1
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Prior art keywords
light
backlight module
guide plate
conversion film
light source
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PCT/CN2019/081582
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English (en)
French (fr)
Inventor
陈杰
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • 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
    • G02B6/0003—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 doped with fluorescent agents
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Definitions

  • the present invention relates to the field of display technology, in particular to a backlight module and a display device.
  • Liquid crystal display device has many advantages such as thin body, power saving, and no radiation, and has been widely used.
  • Most of the liquid crystal display devices on the existing market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module (backlight module).
  • the LCD panel is made of color film substrate (CF, Color Filter), thin film transistor substrate (TFT, Thin Film Transistor), liquid crystal (LC, Liquid Crystal) and sealant frame (Sealant) sandwiched between the color film substrate and the thin film transistor substrate;
  • the working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates.
  • the orientation of the liquid crystal molecules is controlled by whether the glass substrate is energized or not, the polarization state of the light of the backlight module is changed, and the light path is penetrated and blocked by the polarizer to achieve the purpose of display.
  • Quantum Dots are extremely tiny inorganic nanocrystals that are invisible to the naked eye. Most of them are three-dimensional nanomaterials composed of II-VI or III-V elements. Due to the quantum confinement effect, the transport of electrons and holes inside is restricted, so that the continuous energy band structure becomes a separate energy level structure. When excited by external energy such as light or electricity, the quantum dots will emit colored light. The color of the light is determined by the constituent material and size of the quantum dot. When the size of the quantum dot is different, the quantum limits of electrons and holes are The degree is different, and the discrete energy level structure is different. Generally, the smaller the particle, the long wave will be absorbed, and the larger the particle, the short wave will be absorbed. Generally, quantum dots can absorb short-wave blue light and excite long-wavelength light colors. This feature allows quantum dots to change the color of light emitted by the light source.
  • quantum dots by adjusting the size of quantum dots, the emission wavelength range can cover infrared and the entire visible light band, and the emitted light band is narrow, and the color saturation is high; the quantum dot material has high quantum conversion efficiency; material performance is stable; preparation The method is simple and diverse, can be prepared from solution, and has abundant resources. Utilizing the above advantages of quantum dots, quantum dots can be applied to LCD display panels or backlight modules, thereby greatly improving the display color gamut of LCDs.
  • the liquid crystal display device mainly includes a display screen 9 and a backlight module.
  • the backlight module mainly includes a blue LED light source 1, a reflecting sheet 2, a light guide plate 3 arranged on the upper side of the reflecting sheet 2, and a light guide plate 3 arranged on the upper side of the reflecting sheet 2.
  • the light conversion film 4 on the upper side of the light guide plate 3 and the optical film 5 on the upper side of the light conversion film 4, the blue LED light source 1 is arranged on the left side of the light guide plate 3, wherein the light conversion film 4 can realize the blue LED light source 1 Part of the blue light emitted is converted into a wavelength range from about 520nm to about 560nm The other part of the green light is converted into red light with a wavelength ranging from about 630nm to about 660nm, thereby realizing the three primary colors of the display.
  • the light conversion film 4 is arranged above the light guide plate 3. Although the effective conversion of blue light to red light and green light can be realized, the area of the light conversion film 4 and the area of the light conversion sheet should be equivalent to the area of the display screen 9. Therefore, it will bring about the problem that the quantum dot material cannot be effectively used. Due to the high manufacturing cost of quantum dots, the cost of the LCD display device increases, and the large-area light conversion film 4 may have the risk of poor uniformity.
  • the purpose of the present invention is to provide a backlight module that can reduce the area of the film used for light conversion, reduce the use of quantum dot films, reduce production costs, and reduce the risk of poor uniformity.
  • the object of the present invention is also to provide a display device, using the above-mentioned backlight module, can reduce the area of the film used for light conversion, reduce the use of quantum dot film, reduce production costs, and reduce the risk of poor uniformity .
  • the present invention provides a backlight module, including a light guide plate, a light source, and a light conversion film strip;
  • the light guide plate has a top surface and a bottom surface opposite to each other, and a plurality of side surfaces connected to the top surface and the bottom surface, one of the side surfaces is a light-incident surface, and the top surface is a light-emitting surface;
  • the light source is arranged on one side of the light incident surface of the light guide plate;
  • the light conversion film strip is a quantum dot film, which is arranged between the light guide plate and the light source, and is used to convert the light emitted by the light source into mixed light containing light of different wavelengths and emit the mixed light.
  • the mixed light emitted by the light conversion film strip includes red light, green light and blue light.
  • the light emitted by the light source is blue or ultraviolet light.
  • the light conversion film strip includes colloidal material and quantum dots mixed in the colloidal material, and the quantum dots include red quantum dots and green quantum dots.
  • the colloidal material of the light conversion film strip is silica gel or resin.
  • the backlight module further includes a diffusion sheet arranged on the top surface of the light guide plate.
  • the backlight module further includes a prism sheet arranged on the diffusion sheet.
  • the backlight module further includes a reflective sheet arranged under the bottom surface of the light guide plate.
  • the light source is an LED light bar.
  • the present invention also provides a display device including the above-mentioned backlight module and a display panel arranged opposite to the backlight module;
  • the display panel is arranged on one side of the light emitting surface of the light guide plate.
  • the present invention provides a backlight module, including a light guide plate, a light source, and a light conversion film strip.
  • the light source is arranged on one side of the light incident surface of the light guide plate, and the light conversion film strip is quantum
  • the dot film is arranged between the light guide plate and the light source, and is used to convert the light emitted by the light source into mixed light containing light of different wavelengths and emit the mixed light.
  • a large area quantum dot film is used as a light conversion film set on the light-emitting surface of the light guide plate
  • the present invention greatly reduces the area of the film used for light conversion by placing the quantum dot film as a light conversion film strip between the light guide plate and the light source.
  • the use of quantum dot films is reduced, the production cost is reduced, and the small-area light conversion film strip also reduces the risk of poor uniformity such as film surface and quantum dot mixing.
  • the display device of the present invention uses the above-mentioned backlight module to reduce the area of the film used for light conversion, thereby reducing the use of quantum dot films, reducing production costs, and reducing the risk of poor uniformity.
  • FIG. 1 is a schematic diagram of the structure of a conventional liquid crystal display device
  • Fig. 2 is a schematic plan view of the light conversion film in Fig. 1;
  • FIG. 3 is a schematic diagram of the structure of the backlight module of the present invention.
  • FIG. 4 is a schematic plan view of the light conversion film strip in the backlight module of the present invention.
  • FIG. 5 is a schematic diagram of the structure of the display device of the present invention.
  • the present invention first provides a backlight module including a light guide plate 11 ,light source 12 , Light conversion film strip 13 , Optical film 19 And reflector 16 .
  • the light guide plate 11 It has a top surface and a bottom surface opposite to each other, and a plurality of side surfaces connected to the top surface and the bottom surface. One of the side surfaces is a light-incident surface, and the top surface is a light-emitting surface.
  • the light source 12 Set on the light guide plate 11 On the light-incident side.
  • the light conversion film strip 13 It is a quantum dot film, which is set on the light guide plate 11 And light source 12 Between the light source 12 The emitted light is converted into mixed light containing light of different wavelengths and the mixed light is emitted. Therefore, compared with the prior art, the area of the film used for light conversion is reduced, thereby reducing the use of quantum dot films, reducing production costs, and reducing the risk of poor uniformity.
  • the mixed light emitted includes red light, green light and blue light.
  • the light source 12 The emitted light is blue or ultraviolet light ( UV ).
  • the quantum dots include red quantum dots and green quantum dots, so that the red quantum dots and green quantum dots are in the light source 12
  • the emitted blue light or ultraviolet light emits red light and green light when excited; further, when the light source 12 When the emitted light is ultraviolet light, the light conversion film strip 13
  • the quantum dots inside also include blue quantum dots.
  • the colloidal material is silica gel or resin.
  • the optical film 19 Including the light guide plate 11 Diffuser on top 14 And set on the diffuser 14 Prism sheet 15 .
  • the reflective sheet 16 Set on the light guide plate 11 Below the bottom surface.
  • the light source 12 for led Light is a light source 12 for led Light.
  • the backlight module of the present invention uses a large-area quantum dot film as the light conversion film and is arranged on the light-emitting surface of the light guide plate compared to the prior art.
  • the quantum dot film is used as the light conversion film strip. 13 Set on the light guide plate 11 And light source 12 Between, as shown 4 As shown, the area of the film used for light conversion is greatly reduced, thereby reducing the use of quantum dot film, reducing production costs, and the light conversion film strip with a small area 13 It also reduces the risk of poor uniformity such as film surface and quantum dot mixing.
  • the present invention also provides a display device, including the above-mentioned backlight module and a display panel disposed opposite to the backlight module 20 ;
  • the display panel 20 Set on the light guide plate 11 Side of the light-emitting surface.
  • the specific technical features of the backlight module are the same as those in the above-mentioned embodiment, and will not be repeated here.
  • the backlight module used in the display device of the present invention uses a quantum dot film as a light conversion film strip 13 Set on the light guide plate 11 And light source 12 In between, the area of the film used for light conversion is greatly reduced, thereby reducing the use of quantum dot films, reducing production costs, and small area light conversion film strips 13 It also reduces the risk of poor uniformity such as film surface and quantum dot mixing.
  • the present invention provides a backlight module, including a light guide plate, a light source, and a light conversion film strip.
  • the light source is arranged on one side of the light incident surface of the light guide plate, and the light conversion film strip is a quantum dot.
  • the film is arranged between the light guide plate and the light source, and is used to convert the light emitted by the light source into mixed light containing light of different wavelengths and emit the mixed light.
  • a large-area quantum dot film is used as The light conversion film is arranged on the light-emitting surface of the light guide plate.
  • the quantum dot film is arranged as a light conversion film strip between the light guide plate and the light source, which greatly reduces the area of the light conversion film, thereby reducing
  • the use of quantum dot film reduces production costs, and the small-area light conversion film strip also reduces the risk of poor uniformity such as film surface and quantum dot mixing.
  • the display device of the present invention uses the above-mentioned backlight module to reduce the area of the film used for light conversion, thereby reducing the use of quantum dot films, reducing production costs, and reducing the risk of poor uniformity.

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

Abstract

一种背光模组及显示装置。背光模组包括导光板(11)、光源(12)及光转换膜条(13)，光源(12)设置于导光板(11)的入光面一侧，光转换膜条(13)为量子点膜且设置于导光板(11)和光源(12)之间，用于将光源(12)发出的光转换为包含不同波长光的混合光并发出混合光，通过将量子点膜作为光转换膜条(13)设置在导光板(11)和光源(12)之间，大幅减小了用于光转换的膜片的面积，从而减少了量子点膜的使用，降低了生产成本，且小面积的光转换膜条(13)也降低了如膜面、量子点混合等均匀性不佳的风险。

Description

背光模组及显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种背光模组及显示装置。
 背景技术
液晶显示装置（LCD，Liquid Crystal Display）具有机身薄、省电、无辐射等众多优点，得到了广泛的应用。现有市场上的液晶显示装置大部分为背光型液晶显示装置，其包括液晶显示面板及背光模组（backlight module）。通常液晶显示面板由彩膜基板（CF，Color Filter）、薄膜晶体管基板（TFT，Thin Film Transistor）、夹于彩膜基板与薄膜晶体管基板之间的液晶（LC，Liquid Crystal）及密封胶框（Sealant）组成；液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，通过玻璃基板通电与否来控制液晶分子取向，改变背光模组的光线的偏振状态，并藉由偏光板实现光路的穿透与阻挡，实现显示的目的。
量子点（Quantum Dots，简称QD）是肉眼看不到的，极其微小的无机纳米晶体，大部分由Ⅱ-Ⅵ族、或Ⅲ-Ⅴ族元素组成的三个维度尺寸的纳米材料。由于量子限域效应，其内部的电子和空穴的运输受到限制，使得连续的能带结构变成分离的能级结构。每当受到光或电等外来能量激发后，量子点便会发出有色光线，光线的颜色由量子点的组成材料和大小形状决定，当量子点的尺寸不同时，电子与空穴的量子限域程度不一样，分立的能级结构不同，一般颗粒若越小，会吸收长波，颗粒越大，会吸收短波。通常量子点，可吸收短波的蓝光，激发出呈现出长波段光色。这一特性使得量子点能够改变光源发出的光线颜色。
量子点的优势在于：通过调控量子点的尺寸，可以实现发光波长范围覆盖到红外及整个可见光波段，且发射光波段窄，色彩饱和度高；量子点材料量子转换效率高；材料性能稳定；制备方法简单多样，可以从溶液中制备，资源丰富。利用量子点的上述优势，可以将量子点应用于LCD的显示面板或背光模组中，从而可大幅提升LCD的显示色域。
在现有技术中，通常将量子点制备成光转换膜而应用于背光模组中，以利用标准蓝光LED（发光二极管）光源来实现半锋宽较窄的高品质RGB三原色光，可显著提高色域，使得LCD显示屏达到NTSC 120%或以上。如图 1 所示，液晶显示装置主要包括显示屏9与背光模组，其中背光模组又主要包括蓝光LED光源1、反射片2、设置在反射片2上侧的导光板3、设置在所述导光板3上侧的光转换膜4和位于光转换膜4上侧的光学膜片5，蓝光LED光源1设置于所述导光板 3左侧，其中，光转换膜4可实现蓝光LED光源1发出的蓝光一部分转换成波长范围从约520nm 至约560nm 的绿光，另一部分转换成波长范围从约630nm 至约660nm的红光，从而实现显示器的三基色显示。将光转换膜4设置在导光板3的上方，虽然可实现蓝光到红光及绿光的有效转换，但是光转换膜4的面积光转换片面积便要与显示屏9的面积相当，面积大，所以会带来量子点材料不能有效利用的问题，由于量子点制作成本高等原因，使得LCD显示装置的成本增加，且大面积的光转换膜4会存在均匀性不佳的风险。
 技术问题
本发明的目的在于提供一种背光模组，可减小用于光转换的膜片的面积，减少量子点膜的使用，降低生产成本，降低均匀性不佳的风险。
本发明的目的还在于提供一种显示装置，使用上述的背光模组，可减小用于光转换的膜片的面积，减少量子点膜的使用，降低生产成本，降低均匀性不佳的风险。
 技术解决方案
为实现上述目的，本发明提供一种背光模组，包括导光板、光源及光转换膜条；
所述导光板具有相对的顶面和底面及多个与所述顶面和底面均连接的侧面，其中一侧面为入光面，所述顶面为出光面；
所述光源设置于所述导光板的入光面一侧；
所述光转换膜条为量子点膜，设置于所述导光板和光源之间，用于将所述光源发出的光转换为包含不同波长光的混合光并发出该混合光。
所述光转换膜条发出的混合光包含红光、绿光及蓝光。
所述光源发出的光为蓝光或紫外光。
所述光转换膜条包括胶体材料及混合在胶体材料中的量子点，所述量子点包括红色量子点及绿色量子点。
所述光转换膜条的胶体材料为硅胶或树脂。
所述的背光模组还包括设置于所述导光板顶面上的扩散片。
所述的背光模组还包括设置于所述扩散片上的棱镜片。
所述的背光模组还包括设置于所述导光板底面下方的反射片。
所述光源为LED灯条。
本发明还提供一种显示装置，包括如上所述背光模组及与所述背光模组相对设置的显示面板；
所述显示面板设于所述导光板的出光面一侧。
 有益效果
本发明的有益效果：本发明提供一种背光模组，包括导光板、光源及光转换膜条，所述光源设置于所述导光板的入光面一侧，所述光转换膜条为量子点膜且设置于所述导光板和光源之间，用于将所述光源发出的光转换为包含不同波长光的混合光并发出该混合光，相对于现有技术使用大面积的量子点膜作为光转换膜片而设置于导光板出光面上，本发明通过将量子点膜作为光转换膜条设置在导光板和光源之间，大幅减小了用于光转换的膜片的面积，从而减少了量子点膜的使用，降低了生产成本，且小面积的光转换膜条也降低了如膜面、量子点混合等均匀性不佳的风险。本发明的显示装置，使用上述的背光模组，减小了用于光转换的膜片的面积，从而减少量子点膜的使用，降低了生产成本，且降低均匀性不佳的风险。
 附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其他有益效果显而易见。
附图中，
图1为现有一种液晶显示装置的结构示意图；
图2为图1中光转换膜片的平面示意图；
图3为本发明的背光模组的结构示意图；
图4为本发明的背光模组中光转换膜条的平面示意图；
图5为本发明的显示装置的结构示意图。
 本发明的实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图 3 ，本发明首先提供一种背光模组，包括导光板 11 、光源 12 、光转换膜条 13 、光学膜片 19 及反射片 16 。
所述导光板 11 具有相对的顶面和底面及多个与所述顶面和底面均连接的侧面，其中一侧面为入光面，所述顶面为出光面。
所述光源 12 设置于所述导光板 11 的入光面一侧。
所述光转换膜条 13 为量子点膜，设置于所述导光板 11 和光源 12 之间，用于将所述光源 12 发出的光转换为包含不同波长光的混合光并发出该混合光。从而相对于现有技术，减小了用于光转换的膜片的面积，从而减少量子点膜的使用，降低了生产成本，且降低了均匀性不佳的风险。
具体地，所述光转换膜条 13 发出的混合光包含红光、绿光及蓝光。
具体地，所述光源 12 发出的光为蓝光或紫外光（ UV ）。
具体地，所述光转换膜条 13 包括胶体材料及混合在胶体材料中的量子点，所述量子点包括红色量子点及绿色量子点，从而所述红色量子点及绿色量子点在被光源 12 发出的蓝光或紫外光激发时发出红光及绿光；进一步地，当所述光源 12 发出的光为紫外光时，所述光转换膜条 13 内的量子点还包括蓝色量子点。
具体地，所述光转换膜条 13 的胶体材料为硅胶或树脂。
具体地，所述光学膜片 19 包括设置于所述导光板 11 顶面上的扩散片 14 及设置于所述扩散片 14 上的棱镜片 15 。
具体地，所述反射片 16 设置于所述导光板 11 底面下方。
具体地，所述光源 12 为 LED 灯条。
本发明的背光模组，相对于现有技术使用大面积的量子点膜作为光转换膜片而设置于导光板出光面上，通过将量子点膜作为光转换膜条 13 设置在导光板 11 和光源 12 之间，如图 4 所示，大幅减小了用于光转换的膜片的面积，从而减少了量子点膜的使用，降低了生产成本，且小面积的光转换膜条 13 也降低了如膜面、量子点混合等均匀性不佳的风险。
请参阅图 5 ，基于上述背光模组，本发明还提供一种显示装置，包括如上所述背光模组及与所述背光模组相对设置的显示面板 20 ；所述显示面板 20 设于所述导光板 11 的出光面一侧。所述背光模组的具体技术特征与上述实施例相同，在此不再赘述。
本发明的显示装置，所使用的背光模组，通过将量子点膜作为光转换膜条 13 设置在导光板 11 和光源 12 之间，大幅减小了用于光转换的膜片的面积，从而减少了量子点膜的使用，降低了生产成本，且小面积的光转换膜条 13 也降低了如膜面、量子点混合等均匀性不佳的风险。
综上所述，本发明提供一种背光模组，包括导光板、光源及光转换膜条，所述光源设置于所述导光板的入光面一侧，所述光转换膜条为量子点膜且设置于所述导光板和光源之间，用于将所述光源发出的光转换为包含不同波长光的混合光并发出该混合光，相对于现有技术使用大面积的量子点膜作为光转换膜片而设置于导光板出光面上，本发明通过将量子点膜作为光转换膜条设置在导光板和光源之间，大幅减小了用于光转换的膜片的面积，从而减少了量子点膜的使用，降低了生产成本，且小面积的光转换膜条也降低了如膜面、量子点混合等均匀性不佳的风险。本发明的显示装置，使用上述的背光模组，减小了用于光转换的膜片的面积，从而减少量子点膜的使用，降低了生产成本，且降低均匀性不佳的风险。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明后附的权利要求的保护范围。

Claims (10)

  1. 一种背光模组，包括导光板、光源及光转换膜条；
    所述导光板具有相对的顶面和底面及多个与所述顶面和底面均连接的侧面，其中一侧面为入光面，所述顶面为出光面；
    所述光源设置于所述导光板的入光面一侧；
    所述光转换膜条为量子点膜，设置于所述导光板和光源之间，用于将所述光源发出的光转换为包含不同波长光的混合光并发出该混合光。
  2. 如权利要求1所述的背光模组，其中，所述光转换膜条发出的混合光包含红光、绿光及蓝光。
  3. 如权利要求1所述的背光模组，其中，所述光源发出的光为蓝光或紫外光。
  4. 如权利要求1所述的背光模组，其中，所述光转换膜条包括胶体材料及混合在胶体材料中的量子点，所述量子点包括红色量子点及绿色量子点。
  5. 如权利要求4所述的背光模组，其中，所述光转换膜条的胶体材料为硅胶或树脂。
  6. 如权利要求1所述的背光模组，还包括设置于所述导光板顶面上的扩散片。
  7. 如权利要求6所述的背光模组，还包括设置于所述扩散片上的棱镜片。
  8. 如权利要求1所述的背光模组，还包括设置于所述导光板底面下方的反射片。
  9. 如权利要求1所述的背光模组，其中，所述光源为LED灯条。
  10. 一种显示装置，包括如权利要求1所述的背光模组及与所述背光模组相对设置的显示面板；
    所述显示面板设于所述导光板的出光面一侧。
     
PCT/CN2019/081582 2019-03-21 2019-04-04 背光模组及显示装置 Ceased WO2020186566A1 (zh)

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CN104991378A (zh) * 2015-07-09 2015-10-21 武汉华星光电技术有限公司 一种背光模组及液晶显示装置
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