WO2017166489A1 - 一种自发光导光板、背光模组及显示设备 - Google Patents

一种自发光导光板、背光模组及显示设备 Download PDF

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Publication number
WO2017166489A1
WO2017166489A1 PCT/CN2016/088975 CN2016088975W WO2017166489A1 WO 2017166489 A1 WO2017166489 A1 WO 2017166489A1 CN 2016088975 W CN2016088975 W CN 2016088975W WO 2017166489 A1 WO2017166489 A1 WO 2017166489A1
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Prior art keywords
film
self
guide plate
light
light guide
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PCT/CN2016/088975
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English (en)
French (fr)
Inventor
朱昆鹏
贾智帅
孟献雷
张金南
叶芳岱
毕英铎
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Le Holdings Beijing Co Ltd
Leshi Zhixin Electronic Technology Tianjin Co Ltd
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Le Holdings Beijing Co Ltd
Leshi Zhixin Electronic Technology Tianjin Co Ltd
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Priority to US15/240,650 priority Critical patent/US20170285239A1/en
Publication of WO2017166489A1 publication Critical patent/WO2017166489A1/zh
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    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a self-illuminating light guide plate, a backlight module, and a display device.
  • a backlight module of a liquid crystal display device generally uses an LED (light-emitting diode, LED for short) as a light source.
  • the backlight module can be divided into a direct type and a side type.
  • the light source of the direct type backlight module is distributed at the bottom of the light guide plate.
  • the backlight module is mainly applied to a large-sized display device such as a display and a television; the light source of the side-entry backlight module is distributed on the side of the light guide plate, and the backlight is
  • the modules are mainly used in small-sized display devices such as notebooks, PDAs, and mobile phones.
  • the main structure of the side-lit backlight module includes: a backing plate 31 having an accommodating space, and a reflective sheet 32 and a guide placed in the accommodating space of the backing plate 31 and sequentially disposed.
  • the light plate 33 and the optical film 34 are located on the light-emitting side 35 of the light guide plate 33, and the plastic frame 36 above the optical film 34 and connected to the back plate 31.
  • the light emitted by the light source enters the light guide plate from the end surface of the light guide plate, and is totally reflected back and forth between the lower surface and the two sides of the light guide plate, and is pushed toward the other end surface of the light guide plate, and is incident on the lower surface of the light guide plate.
  • the reflected light scatters in all directions and destroys the total reflection condition, so that the partially scattered light has a chance to be transmitted from the upper surface through the light guide plate, and this part of the scattered light is called output light.
  • the function of the reflection sheet is to reflect the light emitted from the reverse side to the front side to increase the light intensity; the optical film diffuses and collects the output light to ensure the brightness and uniformity of the backlight module.
  • the inventors have found that the existing backlight module has the disadvantage that the spacing between two adjacent LEDs of the LED lamp group and the spacing between the LED lamp group and the light incident surface of the light guide plate are relatively large. Assembly errors are therefore likely to cause poor display on the backlight module.
  • the invention provides a self-luminous light guide plate, a backlight module and a display device, so as to improve the optical quality of the backlight module and thereby improve the picture quality of the display device.
  • the self-luminous light guide plate provided by the invention comprises a substrate, the substrate has at least one light incident surface, and the light incident surface is provided with a white light emitting layer.
  • the white light emitting layer comprises a first electrode film, a white light quantum dot material film and a second electrode film which are sequentially formed on the light incident surface.
  • the first electrode film is a cathode film
  • the second electrode film is an anode film
  • the cathode film is a metal oxide film
  • the anode film is a metal film
  • the metal oxide film is an indium tin oxide film.
  • the white light quantum dot material film comprises a manganese sulphide cadmium film, a cadmium selenide film or a cadmium sulfide film.
  • the light incident surface is an upper surface or a side end surface of the substrate.
  • a protective film is disposed between each of the light incident surface of the substrate and the white light emitting layer, and the protective film is a polyethylene terephthalate film.
  • the light-incident surface of the substrate is provided with a white light-emitting layer
  • the self-luminous light-guiding plate when the self-luminous light-guiding plate is applied to the backlight module, it can function as a light source, and the LED light group is used as a light source compared with the prior art.
  • the solution of the invention can avoid the phenomenon that the backlight module is poor due to the assembly error of the LED lamp group, thereby improving the picture quality of the display device; in addition, since the light emitted by the white light emitting layer can vary with the shape of the substrate, When the self-luminous light guide plate is applied to a curved display device, it has a very good development prospect.
  • the present invention also provides a backlight module, comprising the self-luminous light guide plate according to any of the foregoing technical solutions.
  • a backlight module comprising the self-luminous light guide plate according to any of the foregoing technical solutions.
  • the present invention also provides a display device, including the backlight module of any of the foregoing technical solutions. Since the optical quality of the backlight module is good, the display device has a better display effect. In addition, since the light emitted by the white light emitting layer can vary depending on the shape of the substrate, when the backlight module is applied to a curved display device, Has a very good development prospects.
  • FIG. 1 is a schematic cross-sectional view of a prior art backlight module
  • FIG. 2 is a schematic cross-sectional structural view of a backlight module according to an embodiment of the present invention
  • FIG. 3 is a schematic cross-sectional structural view of a self-luminous light guide plate according to an embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional structural view of a self-luminous light guide plate according to another embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional structural view of a self-luminous light guide plate according to still another embodiment of the present invention.
  • FIG. 6 is a schematic cross-sectional view showing a self-luminous light guide plate according to still another embodiment of the present invention.
  • an embodiment of the present invention provides a self-luminous light guide plate 230, including a substrate 300.
  • the substrate 300 has at least one light incident surface, and the light incident surface is provided with a white light emitting layer 200.
  • the light incident surface may be any plane of the substrate.
  • the light incident surface is the upper surface or the side end surface of the substrate.
  • the light incident surface is the upper surface, as shown in the figure. 5 and the self-luminous light guide plate shown in FIG. 6, the light incident surface is a side end surface.
  • the light-incident surface of the substrate is provided with a white light-emitting layer
  • the self-luminous light-guiding plate when the self-luminous light-guiding plate is applied to the backlight module, it can function as a light source, and the LED light group is used as a light source compared with the prior art.
  • the embodiment of the invention can avoid the phenomenon that the backlight module is poor due to the assembly error of the LED lamp group, thereby improving the picture quality of the display device; in addition, since the light emitted by the white light emitting layer can vary according to the shape of the substrate, When the self-luminous light guide plate is applied to a curved display device, it has a very good development prospect.
  • the white light emitting layer 200 includes a first electrode film 20, a white light quantum dot material film 21, and a second electrode film 22 which are sequentially formed on the light incident surface.
  • the second electrode film is an anode film
  • the second electrode film is a cathode film.
  • the specific type of the cathode film is not limited, and may be, for example, a metal oxide film such as indium tin oxide or the like; the specific type of the white light quantum dot material film 21 is not limited, and may be, for example, a cadmium cadmium (CDMnS) film or a cadmium selenide ( CdSe) film or cadmium sulfide (CdS) film or the like; the specific type of the anode film is not limited, and may be, for example, a metal film or the like.
  • CDMnS cadmium cadmium
  • CdSe cadmium selenide
  • CdS cadmium sulfide
  • the anode film and the cathode film form an electric field, and the white light quantum dot material film forms an intermediate state during the electronic transition due to the internal lattice collapse, and when the electron of the anode film is excited from the ground state After the intermediate state, transition to the excited state, and then the excited state After the intermediate state transitions back to the ground state, in this process, the white light quantum dot material film emits a series of visible light of different energies, and a plurality of visible light are superimposed to emit a stable uniform white light.
  • a protective film 23 is provided between each of the light incident surface of the substrate and the white light emitting layer. With such a design, it is easy to form a cathode film on the protective film, and the light guide plate can be protected.
  • the specific type of the protective film is not limited, and may be, for example, a polyethylene terephthalate (PET) film or the like.
  • an embodiment of the present invention provides a backlight module, including the self-luminous light guide plate 230 of any of the foregoing embodiments.
  • the backlight module includes: a backing plate 11 having an accommodating space, a reflective sheet 12, a self-illuminating light guide plate 230 and an optical film 14 disposed in the accommodating space of the backing plate 11, and an optical film A plastic frame 16 above the 14 and connected to the backing plate 11.
  • An embodiment of the present invention provides a display device, including the backlight module of any of the foregoing embodiments. Since the optical quality of the backlight module is good, the display device has a better display effect. In addition, since the light emitted by the white light emitting layer can vary depending on the shape of the substrate, when the backlight module is applied to a curved display device, Has a very good development prospects.
  • the specific type of the display device is not limited, and may be, for example, a liquid crystal television, a liquid crystal display, a tablet, or the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种自发光导光板（230）、背光模组及显示设备。自发光导光板（230）包括基板（300），所述基板（300）具有至少一个入光面，所述入光面设置有白光发光层（200）。由于基板（300）的入光面设置有白光发光层（200），因此该自发光导光板（230）应用于背光模组时，可以充当光源的作用，相比现有技术中采用LED灯组（35）作为光源，可以避免由于LED灯组（35）组装误差带来的背光模组画面不良的现象，进而可以提高显示设备的画面品质；此外，由于白光发光层（200）发出的光线可随基板（300）的形状而变化，因此，该自发光导光板（230）应用于曲面显示设备时，具有十分良好的发展前景。

Description

一种自发光导光板、背光模组及显示设备
本申请要求在2016年03月30日提交中国专利局、申请号为201620261055.2、实用新型名称为“一种自发光导光板、背光模组及显示设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及显示技术领域，特别是涉及一种自发光导光板、背光模组及显示设备。
背景技术
目前，液晶显示设备的背光模组普遍采用LED(light-emitting diode，发光二极管，简称LED)作为光源，根据光源的分布位置，背光模组可分为直下式和侧入式两种。直下式背光模组的光源分布于导光板的底部，该类背光模组主要应用于显示器、电视等大尺寸显示设备；侧入式背光模组的光源分布于导光板的侧边，该类背光模组主要应用于笔记本、掌上电脑以及手机等小尺寸显示设备。
如图1所示，液晶显示设备中，侧入光式背光模组的主要结构包括：具有容置空间的背板31，位于背板31的容置空间内并顺序放置的反射片32、导光板33和光学膜片34，位于导光板33入光侧的LED灯组35，以及位于光学膜片34的上方且与背板31连接的胶框36。
背光模组工作时，光源发出的光从导光板一侧端面进入导光板后，在导光板上下表面及两侧面间来回全反射，向导光板另一侧端面方向推进，当射到导光板下底面的散射网点时，反射光向各个方向散射并破坏全反射条件，从而部分散射光有机会从上表面透射出导光板，这部分散射光称为输出光。反射片的作用是将从反面出射的光线反射到正面，增加光强；光学膜片将输出光进行扩散和汇集，保证了背光模组的亮度和均一性的要求。
在实现本发明过程中，发明人发现现有背光模组存在的缺陷在于，LED灯组的相邻两颗LED之间的间距以及LED灯组与导光板的入光面的间距存在较大的组装误差，因此易导致背光模组的显示画面不良。
发明内容
本发明提供了一种自发光导光板、背光模组及显示设备，以提高背光模组的光学品质，进而提高显示设备的画面品质。
本发明提供的自发光导光板，包括基板，基板具有至少一个入光面，入光面设置有白光发光层。
优选的，所述白光发光层包括在所述入光面上顺序形成的第一电极薄膜、白光量子点材料薄膜以及第二电极薄膜。
优选的，所述第一电极薄膜为阴极薄膜，所述第二电极薄膜为阳极薄膜。
具体的，所述阴极薄膜为金属氧化物薄膜；所述阳极薄膜为金属薄膜。
具体的，所述金属氧化物薄膜为氧化铟锡薄膜。
优选的，所述白光量子点材料薄膜包括锰硫镉薄膜、硒化镉薄膜或者硫化镉薄膜。
具体的，所述入光面为所述基板的上表面或侧端面。
优选的，所述基板的每个入光面与白光发光层之间具有保护薄膜，所述保护薄膜为聚对苯二甲酸乙二酯薄膜。
在本发明技术方案中，由于基板的入光面设置有白光发光层，因此该自发光导光板应用于背光模组时，可以充当光源的作用，相比现有技术中采用LED灯组作为光源，本发明方案可以避免由于LED灯组组装误差带来的背光模组画面不良的现象，进而可以提高显示设备的画面品质；此外，由于白光发光层发出的光线可随基板的形状而变化，因此，该自发光导光板应用于曲面显示设备时，具有十分良好的发展前景。
本发明还提供一种背光模组，包括前述任一技术方案所述的自发光导光板。上述任一技术方案的自发光导光板应用于背光模组时，背光模组的光学品质较好，显示效果较佳。
本发明还提供一种显示设备，包括前述任一技术方案所述的背光模组。由于背光模组的光学品质较好，因而该显示设备的显示效果较佳，此外，由于白光发光层发出的光线可随基板的形状而变化，因此，该背光模组应用于曲面显示设备时，具有十分良好的发展前景。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，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，还可以根据这些附图获得其他的附图。
图1为现有技术背光模组的截面结构示意图；
图2为本发明实施例背光模组的截面结构示意图；
图3为本发明实施例自发光导光板的截面结构示意图；
图4为本发明另一实施例自发光导光板的截面结构示意图；
图5为本发明又一实施例自发光导光板的截面结构示意图；
图6为本发明再一实施例自发光导光板的截面结构示意图。
附图标记：
现有技术部分：
31-背板
32-反射片
33-导光板
34-光学膜片
35-LED灯组
36-胶框
本发明实施例部分：
11-背板
12-反射片
13-导光板
14-光学膜片
15-LED灯组
16-胶框
230-自发光导光板
300-基板
200-白光发光层
20-第一电极薄膜
21-白光量子点材料薄膜
22-第二电极薄膜
23-保护薄膜
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图3所示，本发明实施例提供一种自发光导光板230，包括基板300，基板300具有至少一个入光面，入光面设置有白光发光层200。
其中，入光面可以为基板的任一平面，优选的，入光面为基板的上表面或者侧端面，如图3和图4所示的自发光导光板，入光面为上表面，如图5和图6所示的自发光导光板，入光面为侧端面。
在本发明实施例中，由于基板的入光面设置有白光发光层，因此该自发光导光板应用于背光模组时，可以充当光源的作用，相比现有技术中采用LED灯组作为光源，本发明实施例可以避免由于LED灯组组装误差带来的背光模组画面不良的现象，进而可以提高显示设备的画面品质；此外，由于白光发光层发出的光线可随基板的形状而变化，因此，该自发光导光板应用于曲面显示设备时，具有十分良好的发展前景。
在本发明的一个优选实施例中，白光发光层200包括在入光面顺序形成的第一电极薄膜20、白光量子点材料薄膜21以及第二电极薄膜22。其中，当第一电极薄膜为阴极薄膜时，则第二电极薄膜为阳极薄膜，相应的，当第一电极薄膜为阳极薄膜时，则第二电极薄膜为阴极薄膜。
阴极薄膜的具体类型不限，例如可以为金属氧化物薄膜，如氧化铟锡等等；白光量子点材料薄膜21的具体类型不限，例如可以为锰硫镉(CDMnS)薄膜、硒化镉(CdSe)薄膜或者硫化镉(CdS)薄膜等等；阳极薄膜的具体类型也不限，例如可以为金属薄膜等等。
当具有该自发光导光板的背光模组通电后，阳极薄膜与阴极薄膜形成电场，白光量子点材料薄膜由于其内部晶格塌陷形成电子跃迁时的中间态，当阳极薄膜的电子从基态被激发后，经过中间态后跃迁到激发态，再由激发态 经中间态跃迁回基态，在此过程中，白光量子点材料薄膜释放出一系列不同能量的可见光，多种可见光经过叠加后发射出稳定均一的白光。
在本发明的另一个优选实施例中，基板的每个入光面与白光发光层之间具有保护薄膜23。采用这样的设计，便于在保护薄膜上形成阴极薄膜，并且可以保护导光板。保护薄膜的具体类型不限，例如可以为聚对苯二甲酸乙二酯(PET)薄膜等等。
如图2所示，本发明实施例提供了一种背光模组，包括前述任一实施例的自发光导光板230。
具体的，该背光模组包括：具有容置空间的背板11，位于背板11的容置空间内并顺序放置的反射片12、自发光导光板230和光学膜片14，以及位于光学膜片14的上方且与背板11连接的胶框16。上述任一实施例的自发光导光板应用于背光模组时，背光模组的光学品质较好，显示效果较佳。
本发明实施例提供一种显示设备，包括前述任一实施例的背光模组。由于背光模组的光学品质较好，因而该显示设备的显示效果较佳，此外，由于白光发光层发出的光线可随基板的形状而变化，因此，该背光模组应用于曲面显示设备时，具有十分良好的发展前景。显示设备的具体类型不限，例如可以为液晶电视、液晶显示器、平板电脑，等等。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (10)

  1. 一种自发光导光板，其特征在于，包括基板，所述基板具有至少一个入光面，所述入光面设置有白光发光层。
  2. 根据权利要求1所述的自发光导光板，其特征在于，所述白光发光层包括在所述入光面上顺序形成的第一电极薄膜、白光量子点材料薄膜以及第二电极薄膜。
  3. 根据权利要求2所述的自发光导光板，其特征在于，所述第一电极薄膜为阴极薄膜，所述第二电极薄膜为阳极薄膜。
  4. 根据权利要求3所述的自发光导光板，其特征在于，所述阴极薄膜为金属氧化物薄膜；所述阳极薄膜为金属薄膜。
  5. 根据权利要求4所述的自发光导光板，其特征在于，所述金属氧化物薄膜为氧化铟锡薄膜。
  6. 根据权利要求2所述的自发光导光板，其特征在于，所述白光量子点材料薄膜包括锰硫镉薄膜、硒化镉薄膜或者硫化镉薄膜。
  7. 根据权利要求1所述的自发光导光板，其特征在于，所述入光面为所述基板的上表面或侧端面。
  8. 根据权利要求1所述的自发光导光板，其特征在于，所述基板的每个入光面与白光发光层之间具有保护薄膜，所述保护薄膜为聚对苯二甲酸乙二酯薄膜。
  9. 一种背光模组，其特征在于，包括根据权利要求1～8任一项所述的自发光导光板。
  10. 一种显示设备，其特征在于，包括根据权利要求9所述的背光模组。
PCT/CN2016/088975 2016-03-30 2016-07-06 一种自发光导光板、背光模组及显示设备 Ceased WO2017166489A1 (zh)

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CN107689388B (zh) * 2017-08-08 2020-08-18 惠科股份有限公司 一种显示面板及其制造方法

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