WO2016197368A1 - 一种高色域背光模块及显示装置 - Google Patents

一种高色域背光模块及显示装置 Download PDF

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Publication number
WO2016197368A1
WO2016197368A1 PCT/CN2015/081258 CN2015081258W WO2016197368A1 WO 2016197368 A1 WO2016197368 A1 WO 2016197368A1 CN 2015081258 W CN2015081258 W CN 2015081258W WO 2016197368 A1 WO2016197368 A1 WO 2016197368A1
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WIPO (PCT)
Prior art keywords
plastic frame
backlight module
guide plate
light guide
display device
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Ceased
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PCT/CN2015/081258
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English (en)
French (fr)
Inventor
周革革
陈仕祥
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US14/768,370 priority Critical patent/US9989696B2/en
Publication of WO2016197368A1 publication Critical patent/WO2016197368A1/zh
Anticipated expiration legal-status Critical
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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 technologies, and in particular, to a high color gamut backlight module and a display device.
  • a liquid crystal display device has been widely used as a display component of an electronic device in various electronic products, and a consumer has higher and higher requirements on the color sharpness of the device, which requires an increase in the color gamut value of the display device;
  • the group is an important component in the liquid crystal display device, and the color gamut of the light bar as a light source is bound to be higher and higher.
  • the backlight module includes: a light guide plate, a plastic frame disposed around the light guide plate, a light source flexible circuit board, and a light shielding tape, and the light source flexible circuit board is fixed on the light guide plate and the plastic frame by the light shielding tape, and the optical film It is also fixed on the plastic frame by the double-sided tape, and the liquid crystal display is fixed around the backlight module through the double-sided tape.
  • the cutting edge of the high color gamut diaphragm has a certain width of the ineffective area, the color of the ineffective area is different from the color of the other areas, and the color gamut uniformity is poor.
  • the present invention provides a backlight module and a display device having small color difference and high color gamut uniformity.
  • a high color gamut backlight module includes a light transmissive first plastic frame, a light guide plate, an optical film set and a quantum film, and the optical film set and the quantum film are sequentially stacked on the light guide plate from top to bottom.
  • the inner side surface and the top surface of the first plastic frame are respectively disposed opposite to an end surface of the light guide plate and a lower surface of the quantum film, and a top surface of the first plastic frame is a yellow fluorescent layer.
  • the high color gamut backlight module further includes a reflective layer disposed on a lower surface of the light guide plate.
  • the high color gamut backlight module further includes a back plate, and the back plate is disposed on the lower surface of the light guide plate. surface.
  • the high color gamut backlight module further includes a second plastic frame, the second plastic frame is higher than the first plastic frame, and the second plastic frame is in close contact with the outer surface of the first plastic frame.
  • the first plastic frame is a yellow phosphor filled colloid.
  • the top surface of the first plastic frame is coated with a yellow phosphor.
  • first plastic frame and the second plastic frame are two-color injection molded.
  • the outer wall of the first plastic frame adjacent to the second plastic frame is a reflective layer.
  • the inner surface of the second plastic frame is a light reflecting layer.
  • the present invention also provides a display device including a display panel and the backlight module, and the display panel is disposed on an upper surface of the backlight module.
  • the invention provides a quantum film between the upper surface of the light guide plate and the optical film set, and at the same time, a light-transmissive first plastic frame is arranged on the side of the light guide plate, and the top surface of the first plastic frame has a yellow fluorescent layer.
  • the blue light emitted from the side of the light guide plate is emitted from the top surface of the first plastic frame, and the yellow fluorescent layer is excited to generate white light to pass through the ineffective region of the quantum film, and the white light is emitted from the top surface of the light guide plate, and the color difference between the two is small.
  • the color difference problem of the visible area can be effectively solved, and the color gamut uniformity of the backlight module is high.
  • FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention.
  • the present invention discloses a high color gamut backlight module, including a first plastic frame 11 , a light guide plate 20 , an optical film set 30 and a quantum film 40 , an optical film set 30 and a quantum film 40 is stacked on the light guide plate 20 from top to bottom.
  • the inner side surface and the top surface of the first plastic frame 11 are respectively disposed opposite to one end surface of the light guide plate 20 and the lower surface of the quantum film 40, and the top surface of the quantum film 40 is disposed. It is a yellow fluorescent layer.
  • the lower surface of the light guide plate 20 is provided with a reflective layer 50, and the back plate 60 is disposed on the lower surface of the reflective layer 50.
  • the second plastic frame 12 is higher than the first plastic frame 11 and is in close contact with the outer surface of the first plastic frame 11 .
  • the first plastic frame 11 is a yellow phosphor-filled colloid
  • the second plastic frame 12 is made of a resin material such as PC (polycarbonate).
  • the first plastic frame 11 and the second plastic frame 12 are integrally formed by a two-color injection molding process. .
  • the first plastic frame 11 may only need to be coated with a yellow phosphor on the top surface, and the same effect of the blue light to excite the yellow phosphor to emit white light.
  • the outer wall of the first plastic frame 11 adjacent to the second plastic frame 12 is a light reflecting layer or the inner wall of the second plastic frame 12 adjacent to the first plastic frame 11 is a light reflecting layer.
  • the portion of the quantum diaphragm 40 opposite to the first plastic frame 11 is the diaphragm failure area 40a, and the remaining portion is the visible area. Since the lower surface of the optical film group 30 is provided with a quantum film 40, the periphery of the quantum film 40 The frame failure area 40a is too large. Due to the arrangement of the first plastic frame 11, when the LED light source is lit, the side of the light guide plate 20 emits blue light, and the top surface of the light guide plate 20 emits white light, and the side of the light guide plate 20 The emitted light is excited by the bottom surface of the first plastic frame 11 and the inner wall of the side surface, and then the white light is emitted from the top surface to the diaphragm failure area 40a. The white light emitted from the top surface of the light guide plate 20 is emitted to the visible area, and the failure area 40a. The color difference emitted by the white light is small, and the color gamut uniformity of the backlight module is high.
  • the present invention also provides a display device including a display panel 70 and a backlight module.
  • the display panel 70 is disposed on the upper surface of the optical film set 30 of the backlight module.
  • the light-shielding tape 1 is adhered to the lower surface of the non-display area of the display panel 70, and is attached to the upper surface of the vertical portion of the back plate 60 and the upper surface of the portion of the optical film group 30 to prevent light pollution.
  • the invention provides a quantum film between the upper surface of the light guide plate and the optical film set, and at the same time, a light-transmissive first plastic frame is arranged on the side of the light guide plate, and the top surface of the first plastic frame has a yellow fluorescent layer.
  • the blue light emitted from the side of the light guide plate is emitted from the top surface of the first plastic frame, and the yellow fluorescent layer is excited to generate white light to pass through the ineffective region of the quantum film, and the white light is emitted from the top surface of the light guide plate, and the color difference between the two is small.
  • the color difference problem of the visible area can be effectively solved, and the color gamut uniformity of the backlight module is high.

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

Abstract

一种高色域背光模块以及一种显示装置，所述背光模块包括透光的第一胶框（11）、导光板（20）、光学膜片组（30）和量子膜片（40），所述光学膜片组（30）和量子膜片（40）从上至下依次堆叠于所述导光板（20）上，所述第一胶框（11）的内侧面和顶面分别与所述导光板（20）的一个端面和所述量子膜片（40）的下表面相对设置，所述第一胶框（11）的顶面为黄色荧光层。通过在导光板（20）的上表面和光学膜片组（30）之间设有量子膜片（40），同时，在导光板（20）的侧面设有透光的第一胶框（11），第一胶框（11）的顶面具有黄色荧光层，从导光板（20）的侧面出射的蓝光从第一胶框（11）的顶面射出，激发黄色荧光层产生白色光线穿过量子膜片（40）的无效区，而从导光板（20）的顶面射出的也是白色光线，二者色差小，可以有效解决可视区的色差问题，背光模组的色域均匀性高。

Description

一种高色域背光模块及显示装置 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种高色域背光模块及显示装置。
背景技术
目前，液晶显示装置作为电子设备的显示部件已经广泛的应用于各种电子产品中，消费者对于设备的色彩鲜明度要求越来越高，这就需要提高显示装置的色域值；而背光模组则是液晶显示装置中的一个重要部件，其作为光源的灯条的色域势必要求越来越高。
一般情况下，背光模组包括：导光板、设置于导光板周围的胶框、灯源柔性电路板以及遮光胶带，灯源柔性电路板通过遮光胶带固定在导光板和胶框上，光学膜片也通过遮光双面胶带固定在胶框上，液晶显示屏则通过双面胶与背光模组四周固定。
然而由于高色域膜片的裁切边缘有一定宽度的无效区，导致无效区的颜色与其他区域的颜色产生色差，色域均匀性差。
发明内容
鉴于现有技术存在的不足，本发明提供了一种色差小、色域均匀性高的背光模块及显示装置。
为了实现上述的目的，本发明采用了如下的技术方案：
一种高色域背光模块，包括透光的第一胶框、导光板、光学膜片组和量子膜片，所述光学膜片组和量子膜片从上至下依次堆叠于所述导光板上，所述第一胶框的内侧面和顶面分别与所述导光板的一个端面和所述量子膜片的下表面相对设置，所述第一胶框的顶面为黄色荧光层。
其中，所述高色域背光模块还包括反射层，所述反射层设于所述导光板的下表面。
其中，所述高色域背光模块还包括背板，所述背板设于所述导光板的下表 面。
其中，所述高色域背光模块还包括第二胶框，所述第二胶框高于所述第一胶框，且所述第二胶框紧贴所述第一胶框的外表面。
其中，所述第一胶框为黄色荧光粉填充的胶体。
或者，所述第一胶框的顶面涂覆有黄色荧光粉。
其中，所述第一胶框与所述第二胶框双色注塑成型。
其中，所述第一胶框与所述第二胶框相邻的外壁为反光层。
或者，所述第二胶框的内表面为反光层。
本发明还提供了一种显示装置，包括显示面板和上述背光模块，所述显示面板设于所述背光模块上表面。
本发明在导光板的上表面和光学膜片组之间设有量子膜片，同时，在导光板的侧面设有透光的第一胶框，第一胶框的顶面具有黄色荧光层，从导光板的侧面出射的蓝光从第一胶框的顶面射出，激发黄色荧光层产生白色光线穿过量子膜片的无效区，而从导光板的顶面射出也是白色光线，二者色差小，可以有效解决可视区的色差问题，背光模组的色域均匀性高。
附图说明
图1为本发明实施例的显示装置的结构示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
如图1所示，本发明公开了一种高色域的背光模块，包括第一胶框11、导光板20、光学膜片组30和量子膜片40，光学膜片组30和量子膜片40从上至下依次堆叠于导光板20上，第一胶框11的内侧面和顶面分别与导光板20的一个端面和量子膜片40的下表面相对设置，量子膜片40的顶面为黄色荧光层。
进一步地，导光板20的下表面设有反射层50，背板60设于反射层50的下表面。
第二胶框12高于第一胶框11，紧贴于第一胶框11的外表面。这里，第一胶框11为黄色荧光粉填充的胶体，第二胶框12为PC(聚碳酸酯)等树脂材料制成，第一胶框11与第二胶框12采用双色注塑工艺一体成型。
在其他实施方式中，第一胶框11可只需在顶面涂覆黄色荧光粉，可以同样的起到蓝光激发黄色荧光粉发出白色光线的效果。
本实施例中，第一胶框11与第二胶框12相邻的外壁为反光层或者第二胶框12与第一胶框11相邻的内壁为反光层。
量子膜片40与第一胶框11相对的部分即为膜片失效区40a，其余部分为可视区，由于光学膜片组30下表面设有一层量子膜片40，量子膜片40的四周边框失效区40a偏大，由于第一胶框11的设置，当LED光源点亮时，导光板20的侧面发出蓝色的光线，导光板20的顶面发出白色的光线，导光板20的侧面发出的光经第一胶框11底面、侧面内壁后激发出白光，最后自顶面出射至膜片失效区40a，导光板20的顶面发出的白色光线出射至可视区，与失效区40a发出的白光色差小，背光模组色域均匀性高。
本发明还提供了一种显示装置，包括显示面板70和背光模块，显示面板70设于背光模块的光学膜片组30上表面。遮光胶带1粘贴在显示面板70非显示区域的下表面，并粘贴在背板60的竖直部分上表面和光学膜片组30的的部分上表面，起到防止光污染的作用。
本发明在导光板的上表面和光学膜片组之间设有量子膜片，同时，在导光板的侧面设有透光的第一胶框，第一胶框的顶面具有黄色荧光层，从导光板的侧面出射的蓝光从第一胶框的顶面射出，激发黄色荧光层产生白色光线穿过量子膜片的无效区，而从导光板的顶面射出也是白色光线，二者色差小，可以有效解决可视区的色差问题，背光模组的色域均匀性高。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (20)

  1. 一种高色域背光模块，其中，包括透光的第一胶框、导光板、光学膜片组和量子膜片，所述光学膜片组和量子膜片从上至下依次堆叠于所述导光板上，所述第一胶框的内侧面和顶面分别与所述导光板的一个端面和所述量子膜片的下表面相对设置，所述第一胶框的顶面为黄色荧光层。
  2. 根据权利要求1所述的高色域背光模块，其中，还包括反射层，所述反射层设于所述导光板的下表面。
  3. 根据权利要求1所述的高色域背光模块，其中，还包括背板，所述背板设于所述导光板的下表面。
  4. 根据权利要求1所述的高色域背光模块，其中，还包括第二胶框，所述第二胶框高于所述第一胶框，且所述第二胶框紧贴所述第一胶框的外表面。
  5. 根据权利要求4所述的高色域背光模块，其中，所述第一胶框为黄色荧光粉填充的胶体。
  6. 根据权利要求4所述的高色域背光模块，其中，所述第一胶框的顶面涂覆有黄色荧光粉。
  7. 根据权利要求4所述的高色域背光模块，其中，所述第一胶框与所述第二胶框双色注塑成型。
  8. 根据权利要求4所述的高色域背光模块，其中，所述第一胶框与所述第二胶框相邻的外壁为反光层。
  9. 根据权利要求4所述的高色域背光模块，其中，所述第二胶框的内表面为反光层。
  10. 一种显示装置，其中，包括显示面板和背光模块，所述显示面板设于所述背光模块上表面；所述背光模块包括透光的第一胶框、导光板、光学膜片组和量子膜片，所述光学膜片组和量子膜片从上至下依次堆叠于所述导光板上，所述第一胶框的内侧面和顶面分别与所述导光板的一个端面和所述量子膜片的下表面相对设置，所述第一胶框的顶面为黄色荧光层。
  11. 根据权利要求10所述的显示装置，其中，所述背光模块还包括反射层，所述反射层设于所述导光板的下表面。
  12. 根据权利要求10所述的显示装置，其中，所述背光模块还包括背板，所述背板设于所述导光板的下表面。
  13. 根据权利要求10所述的显示装置，其中，所述背光模块还包括第二胶框，所述第二胶框高于所述第一胶框，且所述第二胶框紧贴所述第一胶框的外表面。
  14. 根据权利要求13所述的显示装置，其中，所述第一胶框为黄色荧光粉填充的胶体。
  15. 根据权利要求13所述的显示装置，其中，所述第一胶框的顶面涂覆有黄色荧光粉。
  16. 根据权利要求13所述的显示装置，其中，所述第一胶框与所述第二胶框双色注塑成型。
  17. 根据权利要求13所述的显示装置，其中，所述第一胶框与所述第二胶框相邻的外壁为反光层。
  18. 根据权利要求13所述的显示装置，其中，所述第二胶框的内表面为反光层。
  19. 根据权利要求11所述的显示装置，其中，所述第一胶框为黄色荧光粉填充的胶体。
  20. 根据权利要求12所述的显示装置，其中，所述第一胶框为黄色荧光粉填充的胶体。
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