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WO2017185446A1 - 背光模组及双面液晶显示装置 - Google Patents

背光模组及双面液晶显示装置 Download PDF

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Publication number
WO2017185446A1
WO2017185446A1 PCT/CN2016/083555 CN2016083555W WO2017185446A1 WO 2017185446 A1 WO2017185446 A1 WO 2017185446A1 CN 2016083555 W CN2016083555 W CN 2016083555W WO 2017185446 A1 WO2017185446 A1 WO 2017185446A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light guide
emitting
liquid crystal
Prior art date
Application number
PCT/CN2016/083555
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English (en)
French (fr)
Inventor
樊勇
萧宇均
Original Assignee
深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US15/107,188 priority Critical patent/US20180101064A1/en
Publication of WO2017185446A1 publication Critical patent/WO2017185446A1/zh

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    • 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
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • 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
    • G02F1/1335—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
    • 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
    • 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
    • G02F1/133342—Constructional arrangements; Manufacturing methods for double-sided displays
    • 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 liquid crystal display technology, and in particular, to a backlight module and a double-sided liquid crystal display device
  • liquid crystal display LCD
  • LCD liquid crystal display
  • the LCD screen requires a backlight to illuminate as a light source.
  • the conventional backlight module comprises a backlight composed of LEDs. The light of the backlight is converted into a surface light source through the light guide plate, and is emitted from the backlight module through the uniformity of the diffusion sheet, and the liquid crystal panel can display us. The image you need.
  • the double-sided display is widely used, and the double-sided liquid crystal display device is only more expensive than the backlight of two independent liquid crystal displays, which only saves one back plate.
  • the technical problem to be solved by the present invention is to provide a backlight module and a double-sided liquid crystal display device, which can reduce the cost and ensure the uniform brightness of the double-sided display screen.
  • the backlight module includes a plastic frame, a first light guide plate, a second light guide plate, a quantum dot fluorescent film, and a backlight, which are received in the plastic frame.
  • the first light guide plate includes a first bottom surface and a first light incident surface connected to the first bottom surface
  • the second light guide plate includes a second bottom surface and a second light incident surface connected to the second bottom surface.
  • the first bottom surface is opposite to the second bottom surface, and the quantum dot fluorescent film is sandwiched between the first bottom surface and the first surface
  • the backlight is located on one side of the first light incident surface and the second light incident surface, and the light exiting sides of the first light guide plate and the second light guide plate are respectively provided with an optical film layer.
  • first bottom surface and the second bottom surface are provided with mesh dots.
  • the light-emitting side of the first light guide plate and the second light guide plate are all light-emitting surfaces, and the optical film layer is a diffusion film, and the diffusion film is respectively attached to the light-emitting surfaces of the first light guide plate and the second light guide plate. .
  • the light-emitting sides of the first light guide plate and the second light guide plate are all light-emitting surfaces, and the light-emitting surfaces of the first light guide plate and the second light guide plate are provided with mesh dots.
  • the backlight includes a circuit board and a blue LED lamp disposed on the circuit board.
  • one of the first light guide plate and the second light guide plate is made of a glass material, and the other is made of optical grade acrylic.
  • Another backlight module of the present application includes a plastic frame and a light guide plate, a quantum dot fluorescent film, two diffusion films, two optical films and a backlight housed in the plastic frame, and the light guide plate includes a first light output.
  • the surface of the second light-emitting surface is connected to the light-incident surface of the first light-emitting surface and the second light-emitting surface, and the two optical film layers are respectively attached to the first light-emitting surface and the second light-emitting surface;
  • a backlight is located on one side of the light incident surface, and the quantum dot fluorescent film is located between the backlight and the light incident surface.
  • the first light emitting surface or the second light emitting surface is provided with a mesh point.
  • the optical film layer includes a diffusion film and an optical film, and the optical film and the diffusion film are sequentially stacked on the first light emitting surface and the second light emitting surface of the light guide plate.
  • the double-sided liquid crystal display device of the present application comprises two liquid crystal display panels and the backlight module, and the two liquid crystal display panels are mounted above the two optical films.
  • the backlight module of the present application clamps the quantum dot fluorescent film between the two light guide plates, and the light entering the light guide plate enters the quantum dot fluorescent film through the surface provided with the dot to excite the quantum dots to form red light and green light.
  • the blue light of the LED of the backlight is mixed to form white light, and then the first light guide plate and the second light guide plate are emitted through the light surface to enter the two liquid crystal display panels, and the brightness and chromaticity of the light output of the two light guide plates are uniform, thereby The two LCD panels display color and uniformity.
  • FIG. 1 is a schematic cross-sectional view of a backlight module in a preferred embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of a double-sided liquid crystal display device having the backlight module of FIG. 1.
  • FIG 3 is a schematic cross-sectional view of a backlight module in another embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional view of a double-sided liquid crystal display device having the backlight module of FIG. 3.
  • the present application provides a backlight module and a double-sided liquid crystal display device, wherein the backlight module provides an effective light source for the double-sided liquid crystal display device.
  • the backlight module includes a plastic frame (not shown), a first light guide plate 10, a second light guide plate 15, a quantum dot fluorescent film 20, two optical film layers, and a backlight 28 housed in the plastic frame.
  • the first light guide plate 10 includes a first bottom surface 11 and a first light incident surface 12 connected to the first bottom surface 11.
  • the second light guide plate 15 includes a second bottom surface 16 and is connected to the second bottom surface 16.
  • the optical film layer includes an optical film 25 and a diffusion film, and the optical film 25 is an anti-reflection film or a filter film.
  • the first bottom surface 11 and the second bottom surface 16 are respectively provided with mesh dots for changing the direction of light entering the light guide plate.
  • the light-emitting sides of the first light guide plate 10 and the second light guide plate 15 are all light-emitting surfaces 18 . In other embodiments, the light-emitting surfaces of the first light guide plate 10 and the second light guide plate 15 are provided with dots.
  • the two optical films 25 are respectively attached to the light-emitting surfaces 18 of the first light guide plate 10 and the second light guide plate 105.
  • the diffusion film 26 is disposed between the optical films 25, and the second light guide plate is disposed.
  • the diffusion film 27 is provided between the light-emitting surface 18 of 15 and the corresponding optical film 25.
  • the plastic frame includes a peripheral side plate, and the peripheral side plate encloses a receiving space for receiving the first light guide plate 10, the second light guide plate 15, the quantum dot fluorescent film 20, and the backlight 28 . Said The first light guide plate 10, the quantum dot fluorescent film 20, the second light guide plate 15, and the optical film layer are stacked.
  • the first light guide plate 10 and the second light guide plate 15 are made of optical grade acrylic or PC sheet.
  • one of the first light guide plate 10 and the second light guide plate 15 is made of glass material, and the other is made of optical grade acrylic (PMMA).
  • the first light guide plate 10 is made of glass material, and the second light guide plate 15 is made of polymethyl methacrylate.
  • the hardness of the glass material is strong, so that the strength of the backlight module is increased, thereby increasing the liquid crystal using the backlight module.
  • the backlight 28 includes a circuit board and a blue LED lamp disposed on the circuit board.
  • the double-sided liquid crystal display device described in the present application includes two liquid crystal display panels 60.
  • the two liquid crystal display panels 60 are mounted above the two optical films 25.
  • the light of the backlight 28 enters the two liquid crystal display panels 60 through the first light guide plate 10 and the second light guide plate 15, respectively.
  • the backlight module of the present application clamps the quantum dot fluorescent film 20 between two light guide plates, and the light entering the light guide plate enters the quantum dot fluorescent film 20 through the surface provided with the dot to excite the quantum dots to form red light and green light.
  • the fluorescent film 20 is spotted to save material, and the brightness and chromaticity of the light emitted by the two light guide plates are uniform, so that the display colors of the two liquid crystal display panels 60 are unified.
  • a backlight module includes a plastic frame (not shown), a light guide plate 30 housed in the plastic frame, a quantum dot fluorescent film 35, two optical film layers, and a backlight 50, the light guide plate 30 includes a first light-emitting surface 31, and a second light-emitting surface 32 is connected to the light-incident surface 33 of the first light-emitting surface 31 and the second light-emitting surface 32.
  • Each of the optical film layers includes a diffusion film. 40 and optical film 45.
  • the diffusion film 40 is respectively attached to the first light-emitting surface 31 and the second light-emitting surface 32; the two optical films 45 are respectively attached to the two diffusion films 40, and the backlight 50 is located at the light-introducing film On one side of the face 33, the quantum dot fluorescent film 35 is located between the backlight 50 and the light incident surface 33.
  • the light guide plate 30 is provided with a light incident surface 33.
  • the light guide plate 30 has two light incident surfaces 33.
  • the backlights 50 are two, respectively located on one side of the two light incident surfaces. Referring to FIG. 4, the backlight module of the present embodiment and the two liquid crystal display panels 60 constitute a double-sided liquid crystal display device.
  • the optical film 45 is an antireflection film or a filter film
  • a mesh point is disposed on the first light-emitting surface 31 or the second light-emitting surface 32.
  • the first light-emitting surface 31 is provided with a net.
  • the light of the backlight 50 excites the quantum dot fluorescent film 20 shape After being red and green, it is mixed with the blue light of the LED of the backlight 28 to form white light, and then enters the light guide plate 30 to be emitted from the light exiting surface, thereby not only improving the color gamut quality, but also saving material with only one light guide plate, and ensuring two The chromaticity of the light from the light guide plate is uniform.
  • the diffusion film 40 can effectively prevent the problem of excessive brightness difference between the two sides of the light guide plate 30 and the interference fringe of the light guide plate 30 dot and the pixel array in the liquid crystal panel.

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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)
  • Liquid Crystal (AREA)

Abstract

一种背光模组，包括胶框以及收容于胶框内的第一导光板（10）、第二导光板（15）、量子点荧光膜（20）、两个光学薄膜及背光灯（28），第一导光板（10）包括第一底面（11）及与第一底面（11）连接的第一入光面（12），第二导光板（15）包括第二底面（16）及与第二底面（16）连接的第二入光面（17），第一底面（11）与第二底面（16）相对设置，量子点荧光膜（20）夹持于第一底面（11）与第二底面（16）之间，背光灯（28）位于第一入光面（12）及第二入光面（17）的一侧，两个光学薄膜分别贴于第一导光板（10）及第二导光板（15）的出光侧。还提供了一种双面液晶显示装置。

Description

背光模组及双面液晶显示装置
本发明要求2016年4月29日递交的发明名称为“背光模组及双面液晶显示装置”的申请号201610280397.3的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及液晶显示技术领域，特别涉及一种背光模组及双面液晶显示装置
背景技术
随着光电与半导体技术的演进，也带动了平板显示装置(Flat Panel Display)的蓬勃发展，而在诸多平板显示器中，液晶显示装置(Liquid Crystal Display，简称LCD)因具有高空间利用效率、低消耗功率及低电磁干扰等诸多优越特性，已被应用于生活的各个方面。而液晶显示屏都需要背光来作为光源点亮。传统的背光模组包括LED组成的背光源，背光源的光线经过导光板将光源转化成面光源射出，经过扩散片的匀光作用，从背光模组出射，经过液晶面板后即可显示出我们所需要的图像。在目前的商业显示中双面显示屏被广泛应用，双面液晶显示装置只是比两个独立的液晶显示屏的背光只是省掉一个背板，成本较高。
发明内容
本发明所要解决的技术问题在于提供一种背光模组及双面液晶显示装置，背光模组可以降低成本且保证双面显示屏亮度一致。
为了实现上述目的，本发明实施方式提供如下技术方案：所述背光模组包括胶框以及收容于所述胶框内的第一导光板、第二导光板、量子点荧光膜及背光灯，所述第一导光板包括第一底面及与所述第一底面连接的第一入光面，所述第二导光板包括第二底面及与所述第二底面连接的第二入光面，所述第一底面与所述第二底面相对设置，所述量子点荧光膜夹持于所述第一底面与所述第 二底面之间，所述背光灯位于所述第一入光面及第二入光面的一侧，所述第一导光板及第二导光板的出光侧均设有光学膜层。
其中，所述第一底面与所述第二底面上均设有网点。
其中，所述第一导光板及第二导光板的出光侧均为出光面，所述光学膜层为扩散膜，扩散膜分别贴于所述第一导光板及第二导光板的出光面上。
其中，所述第一导光板及第二导光板的出光侧均为出光面，所述第一导光板及第二导光板的出光面上设有网点。
其中，所述背光灯包括电路板及设于电路板的蓝光LED灯。
其中，所述第一导光板与所述第二导光板中之一为玻璃材料制成，另一个为光学级亚克力制成。
本申请的另一种背光模组包括胶框以及收容于所述胶框内的导光板、量子点荧光膜、两个扩散膜、两个光学薄膜及背光灯，所述导光板包括第一出光面、第二出光面极连接第一出光面与第二出光面的入光面，所述两个两个光学膜层分别贴于所述第一出光面与第二出光面上；，所述背光灯位于所述入光面的一侧，所述量子点荧光膜位于所述背光灯与所述入光面之间。其中，所述第一出光面或者第二出光面上设有网点。
所述光学膜层包括扩散膜和光学薄膜，所述光学薄膜与所述扩散膜依次叠加设于导光板第一出光面与第二出光面。
本申请所述的双面液晶显示装置，包括两个液晶显示面板及所述的背光模组，所述两个液晶显示面板装于所述两个光学薄膜上方。
本申请所述的背光模组将量子点荧光膜夹持于两个导光板之间，进入导光板的光线通过设有网点的面进入量子点荧光膜激发量子点形成红光和绿光后与背光灯的LED的蓝光混合形成白光，再经第一导光板及第二导光板过出光面射出进入两个所述液晶显示面板，而且保证两个导光板出光的亮度及色度一致，进而使两个液晶显示面板显示色与统一。
附图说明
为了更清楚地说明本发明的技术方案，下面将对实施方式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 方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以如这些附图获得其他的附图。
图1是本发明较佳实施方式中的背光模组截面示意图。
图2是具有图1的背光模组的双面液晶显示装置截面示意图。
图3是本发明另一实施方式中的背光模组截面示意图。
图4是具有图3的背光模组的双面液晶显示装置截面示意图。
具体实施方式
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述。
请参阅图1与图2，本申请提供一种背光模组及双面液晶显示装置，所述背光模组为双面液晶显示装置提供有效光源。所述背光模组包括胶框(图未示)，收容于所述胶框内的第一导光板10、第二导光板15、量子点荧光膜20、两个光学膜层及背光灯28。所述第一导光板10包括第一底面11及与所述第一底面11连接的第一入光面12，所述第二导光板15包括第二底面16及与所述第二底面16连接的第二入光面17，所述第一底面11与所述第二底面16相对设置，所述量子点荧光膜20夹持于所述第一底面11与所述第二底面16之间，所述背光灯28位于所述第一入光面12及第二入光面17的一侧，所述两个光学膜层分别贴于所述第一导光板10及第二导光板15的出光侧。本实施例中，光学膜层包括光学薄膜25及扩散膜，光学薄膜25为增透膜或滤光膜。
本实施例中，所述第一底面11与所述第二底面16上均设有网点，用于改变进入导光板内的光线方向。所述第一导光板10及第二导光板15的出光侧均为出光面18。在其它实施方式中，所述第一导光板10及第二导光板15的出光面上设有网点。所述两个光学薄膜25分别贴于所述第一导光板10及第二导光板105的出光面18上，所述光学薄膜25之间设有所述扩散膜26，所述第二导光板15的出光面18与相应的光学薄膜25之间设有所述扩散膜27。光线透过以PET作为基材的扩散膜，可修正光线成均匀面光源以达到光学扩散的效果。本实施例中，所述胶框包括周侧板，所述周侧板围成收容空间，用以收容所述第一导光板10、第二导光板15、量子点荧光膜20及背光灯28。所述 第一导光板10、量子点荧光膜20、第二导光板15、光学膜层为层叠设置。
所述第一导光板10及第二导光板15为光学级亚克力或PC板材制成。当背光模组尺寸较大时，所述第一导光板10及第二导光板15中之一为玻璃材料制成，另一个为光学级亚克力(PMMA)制成。比如第一导光板10为玻璃材料制成，第二导光板15为聚甲基丙烯酸甲酯制成，玻璃材料硬度较强，使背光模组强度增加，进而可以增加使用该背光模组的液晶显示面板的强度。所述背光灯28包括电路板及设于电路板的蓝光LED灯。
参图2，本申请所述的双面液晶显示装置包括两个液晶显示面板60。所述两个液晶显示面板60装于所述两个光学薄膜25上方。所述背光灯28的光线经第一导光板10及第二导光板15分别进入两个所述液晶显示面板60内。本申请所述的背光模组将量子点荧光膜20夹持于两个导光板之间，进入导光板的光线通过设有网点的面进入量子点荧光膜20激发量子点形成红光和绿光后与背光灯28的LED的蓝光混合形成白光，再经第一导光板10及第二导光板15过出光面射出进入两个所述液晶显示面板，不仅提高色域品质、并只用一个量子点荧光膜20，节省材料，而且保证两个导光板出光的亮度及色度一致，进而使两个液晶显示面板60显示色统一。
参阅图3与图4，本发明另一实施例的背光模组包括胶框(图未示)以及收容于所述胶框内的导光板30、量子点荧光膜35、两个光学膜层及背光灯50，所述导光板30包括第一出光面31、第二出光面32极连接第一出光面31与第二出光面32的入光面33，所述每一光学膜层包括扩散膜40及光学薄膜45。扩散膜40分别贴于所述第一出光面31与第二出光面32上；所述两个光学薄膜45分别贴于所述两个扩散膜40上，所述背光灯50位于所述入光面33的一侧，所述量子点荧光膜35位于所述背光灯50与所述入光面33之间。本实施例中，所述导光板30设有一个入光面33。在其他实施例中，所述导光板30具有两个入光面33，相应的，所述背光灯50为两个，分别位于两个入光面一侧。参见图4，本实施例的背光模组与所述两个液晶显示面板60构成双面液晶显示装置。光学薄膜45为增透膜或滤光膜
进一步的，所述第一出光面31或者第二出光面32上设有网点。本实施例中，所述第一出光面31上设有网。背光灯50的光线激发量子点荧光膜20形 成红光和绿光后与背光灯28的LED的蓝光混合形成白光，再经进入导光板30由过出光面射出，如此不仅提高色域品质、只用一个导光板节省材料，而且保证两个导光板出光的色度统一。其中扩散膜40可以有效防止导光板30两侧背光亮度差异过大问题以及导光板30网点与液晶面板中像素阵列的干涉条纹现象。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (18)

  1. 一种背光模组，其中，所述背光模组包括胶框以及收容于所述胶框内的第一导光板、第二导光板、量子点荧光膜及背光灯，所述第一导光板包括第一底面及与所述第一底面连接的第一入光面，所述第二导光板包括第二底面及与所述第二底面连接的第二入光面，所述第一底面与所述第二底面相对设置，所述量子点荧光膜夹持于所述第一底面与所述第二底面之间，所述背光灯位于所述第一入光面及第二入光面的一侧，所述第一导光板及第二导光板的出光侧均设有光学膜层。
  2. 如权利要求1所述的背光模组，其中，所述第一底面与所述第二底面上均设有网点。
  3. 如权利要求1所述的背光模组，其中，所述第一导光板及第二导光板的出光侧均为出光面，所述光学膜层为扩散膜，扩散膜分别贴于所述第一导光板及第二导光板的出光面上。
  4. 如权利要求1所述的背光模组，其中，所述第一导光板及第二导光板的出光侧均为出光面，所述第一导光板及第二导光板的出光面上设有网点。
  5. 如权利要求1所述的背光模组，其中，所述背光灯包括电路板及设于电路板的蓝光LED灯。
  6. 如权利要求1所述的背光模组，其中，所述第一导光板与所述第二导光板中之一为玻璃材料制成，另一个为光学级亚克力制成。
  7. 一种背光模组，其中，所述背光模组包括胶框以及收容于所述胶框内的导光板、量子点荧光膜、两个光学膜层及背光灯，所述导光板包括第一出光面、第二出光面极连接第一出光面与第二出光面的入光面，所述光学膜层分别贴于所述第一出光面与第二出光面上所述背光灯位于所述入光面的一侧，所述量子点荧光膜位于所述背光灯与所述入光面之间。
  8. 如权利要求7所述的背光模组，其中，所述光学膜层包括扩散膜和光学薄膜，所述光学薄膜与所述扩散膜依次叠加设于导光板第一出光面与第二出光面。
  9. 如权利要求7所述的背光模组，其中，所述第一出光面或者第二出光面 上设有网点。
  10. 一种双面液晶显示装置，其中，液晶显示装置包括两个液晶显示面板及背光模组，所述背光模组包括胶框以及收容于所述胶框内的第一导光板、第二导光板、量子点荧光膜及背光灯，所述第一导光板包括第一底面及与所述第一底面连接的第一入光面，所述第二导光板包括第二底面及与所述第二底面连接的第二入光面，所述第一底面与所述第二底面相对设置，所述量子点荧光膜夹持于所述第一底面与所述第二底面之间，所述背光灯位于所述第一入光面及第二入光面的一侧，所述第一导光板及第二导光板的出光侧均设有光学膜层，所述两个液晶显示面板装于所述两个光学薄膜上方。
  11. 如权利要求10所述的双面液晶显示装置，其中，所述第一底面与所述第二底面上均设有网点。
  12. 如权利要求10所述的双面液晶显示装置，其中，所述第一导光板及第二导光板的出光侧均为出光面，所述光学膜层为扩散膜，扩散膜分别贴于所述第一导光板及第二导光板的出光面上。
  13. 如权利要求10所述的双面液晶显示装置，其中，所述第一导光板及第二导光板的出光侧均为出光面，所述第一导光板及第二导光板的出光面上设有网点。
  14. 如权利要求10所述的双面液晶显示装置，其中，所述背光灯包括电路板及设于电路板的蓝光LED灯。
  15. 如权利要求10所述的双面液晶显示装置，其中，所述第一导光板与所述第二导光板中之一为玻璃材料制成，另一个为光学级亚克力制成。
  16. 一种双面液晶显示装置，其中，液晶显示装置包括两个液晶显示面板及背光模组，所述背光模组包括胶框以及收容于所述胶框内的导光板、量子点荧光膜、两个光学膜层及背光灯，所述导光板包括第一出光面、第二出光面极连接第一出光面与第二出光面的入光面，所述光学膜层分别贴于所述第一出光面与第二出光面上所述背光灯位于所述入光面的一侧，所述量子点荧光膜位于所述背光灯与所述入光面之间，所述两个液晶显示面板装于所述两个光学薄膜上方。
  17. 如权利要求16所述的双面液晶显示装置，其中，所述光学膜层包括 扩散膜和光学薄膜，所述光学薄膜与所述扩散膜依次叠加设于导光板第一出光面与第二出光面。
  18. 如权利要求16所述的双面液晶显示装置，其中，所述第一出光面或者第二出光面上设有网点。
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