WO2019000481A1 - 用于有机发光器件的散热结构及显示装置 - Google Patents

用于有机发光器件的散热结构及显示装置 Download PDF

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Publication number
WO2019000481A1
WO2019000481A1 PCT/CN2017/092112 CN2017092112W WO2019000481A1 WO 2019000481 A1 WO2019000481 A1 WO 2019000481A1 CN 2017092112 W CN2017092112 W CN 2017092112W WO 2019000481 A1 WO2019000481 A1 WO 2019000481A1
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Prior art keywords
heat insulating
heat
organic light
emitting device
heat dissipation
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PCT/CN2017/092112
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English (en)
French (fr)
Inventor
涂爱国
李金川
魏锋
姜亮
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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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Priority to US15/569,846 priority Critical patent/US10270065B2/en
Publication of WO2019000481A1 publication Critical patent/WO2019000481A1/zh
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8794—Arrangements for heating and cooling
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/127—Active-matrix OLED [AMOLED] displays comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates

Definitions

  • the present invention relates to an organic light emitting device technology, and more particularly to a heat dissipation structure and display device for an organic light emitting device.
  • OLED Organic light-emitting
  • OLEDs do not require a backlight, high contrast ratio, thin thickness, wide viewing angle, fast response speed, can be used for flexible panels, wide temperature range, and simple structure and process. Other excellent features are considered to be the next generation of flat panel display emerging application technologies.
  • the structure of the OLED device is composed of an anode (ITO), a cathode, and an organic functional layer sandwiched therebetween.
  • the organic functional layer includes a layer composed of HIL, HTL, EML, ETL, and the like.
  • OLED devices are greatly affected by temperature. After the OLED device is fabricated into a TV as a panel, the OLED device accelerates the aging of the OLED device due to the heat source; the largest heat source comes from the driver circuit portion, and the general driver circuit is supported by the flexible circuit. On the circuit board.
  • the back cover of the OLED TV is generally a heat dissipating material. By bending the flexible circuit board to the side of the back cover facing away from the panel, heat is prevented from being transmitted to the panel, and the heat dissipating material is favorable for internal heat dissipation, but the driving circuit portion cannot be avoided.
  • the effect of heat on the OLED device after a long time of use, the brightness of the OLED device adjacent to the driver circuit portion will be lower than other regions, thereby affecting the display effect.
  • the present invention provides a heat dissipation structure and a display device for an organic light emitting device, thereby extending the service life of the organic light emitting device.
  • the present invention provides a heat dissipation structure for an organic light emitting device, comprising a heat dissipation plate and a heat insulation layer provided on one side surface of the heat dissipation plate for isolating heat of a driving circuit of the organic light emitting device.
  • the heat insulation layer comprises a heat insulation layer and/or a reflective heat insulation layer.
  • the heat insulation layer includes a heat insulation layer and a reflective heat insulation layer.
  • the heat insulating layer is made of a heat insulating material.
  • the heat insulating material is a porous heat insulating material or a fiber heat insulating material.
  • the reflective heat insulating layer is made of a reflective heat insulating material.
  • the reflective heat insulating material is an aluminum foil.
  • the heat insulating material is a porous heat insulating material
  • the porous heat insulating material is one of diatomaceous earth, expanded vermiculite, expanded perlite, foamed clay, and microporous calcium silicate.
  • the present invention also provides a display device including a support frame and a panel disposed in the support frame, and further comprising the heat dissipation structure for the organic light emitting device, the heat dissipation layer being disposed in the support frame and disposed opposite to the panel
  • the heat insulating layer is disposed on a side surface of the heat dissipation layer facing away from the panel, and the heat dissipation layer constitutes a back cover of the display device, and the flexible circuit board of the panel is bent to a side surface of the heat insulation layer facing away from the panel.
  • the panel is composed of an organic light emitting device.
  • the present invention separates the flexible circuit board bent from the side of the heat dissipation plate away from the side surface of the organic light emitting device from the heat dissipation plate by providing a heat insulating layer on the surface of the heat dissipation plate facing away from the organic light emitting device, so that the flexible circuit is isolated.
  • the heat generated by the driving circuit on the board is not transmitted to the organic light emitting device, and the heat of the heat dissipation of the driving circuit of the flexible circuit board is prevented from causing uneven brightness of the organic light emitting device, thereby prolonging the service life of the organic light emitting device.
  • FIG. 1 is a schematic structural view of a heat dissipation structure for an organic light emitting device of the present invention
  • FIG. 2 is a schematic view showing the structure of a display device of the present invention.
  • the present invention discloses a heat dissipation structure for an organic light emitting device, including heat dissipation.
  • the board 2 is provided with a heat insulating layer 3 for isolating the heat of the driving circuit of the organic light emitting device on one side surface of the heat sink 2, and the heat insulating layer 3 and the heat sink 2 are bonded to each other.
  • the heat insulating layer 3 includes a heat insulating layer 4 and/or a reflective heat insulating layer 5.
  • the reflective heat insulating layer 5 is located on one side surface of the heat insulating layer 4 on the back discrete heat plate 2.
  • the position of the reflective heat insulating layer 5 is corresponding to the position of the driving circuit of the organic light emitting device, which is specifically disposed between the driving circuit and the heat insulating layer 4, and the heat insulating layer 4 and the reflective heat insulating layer 5 drive the circuit Sandwiched between the two, the heat generated by the isolation driving circuit is prevented, and the heat is prevented from being transmitted to the organic light emitting device.
  • the portion of the organic light emitting device opposite to the driving circuit is heated, and the portion is accelerated.
  • the aging speed of the organic light-emitting device is such that the brightness of the portion is different from that of the remaining portion, so that the brightness portion is uniform, and the life of the portion is also shorter than the rest.
  • the heat insulating layer 4 is made of a heat insulating material, specifically a porous heat insulating material or a fiber heat insulating material;
  • the reflective heat insulating layer 5 is made of a reflective heat insulating material, specifically an aluminum foil;
  • the heat dissipation plate 2 includes a composite aluminum plate and a composite The graphite sheet is disposed in a stacked manner;
  • the heat insulating material is selected from the group consisting of porous heat insulating materials, specifically one of diatomaceous earth, expanded vermiculite, expanded perlite, foamed clay, and microporous calcium silicate.
  • the present invention also discloses a display device including a support frame 7 and a panel 1 disposed in the support frame 7.
  • the display device further includes the above-mentioned heat dissipation structure for an organic light-emitting device, wherein: heat dissipation
  • the plate 2 is disposed in the support frame 7 and disposed opposite to the panel 1, and the heat insulation layer 3 is disposed on a side surface of the heat dissipation plate 2 facing away from the panel 1, the heat dissipation plate 2 constituting a rear cover of the display device, which is embedded in the support frame 7
  • the driving circuit 6 of the panel 1 is bent at a side surface of the heat insulating layer 3 facing away from the panel 1, where the driving circuit 6 can be disposed on the flexible circuit board and bent by the flexible circuit board to the heat insulating layer 3 facing away from the panel 1. On one side surface, the drive circuit 6 is bonded to the heat insulating layer 3.
  • the panel 1 is composed of an organic light-emitting device and includes at least three light-emitting units.
  • the heat insulating layer 3 includes a heat insulating layer 4 and a reflective heat insulating layer 5, and the reflective heat insulating layer 5 is disposed on one side surface of the heat insulating layer 3 on the back of the discrete heat plate 2. Since the reflective heat insulating layer 5 is used for further isolating the heat generated by the driving circuit 6, The area of the heat insulating layer 5 is smaller than the area of the heat insulating layer 4, and only needs to be disposed at a position having the driving circuit 6.
  • the position of the reflective heat insulating layer 5 is corresponding to the position of the driving circuit 6, which is specifically Between the driving circuit 6 and the heat insulating layer 4, the driving circuit 6 is sandwiched between the heat insulating layer 4 and the reflective heat insulating layer 5, so as to isolate the heat generated by the driving circuit on the driving circuit 6, avoiding The heat is not transmitted to the panel 1. Since the panel is composed of an organic light-emitting device, including a plurality of light-emitting units, if the heat of the driving circuit is conducted to the light-emitting unit located there, the portion of the light-emitting unit is heated, thereby accelerating the portion of the light-emitting unit.
  • the aging speed of the unit causes the brightness of the panel 1 to be uneven, and the service life of the panel 1 is reduced. Therefore, by insulating the heat of the driving circuit, heat can be prevented from being transmitted to the panel 1 side, and the overall life of the panel 1 is prolonged. .
  • the heat insulating layer 4 is made of a heat insulating material, specifically a porous heat insulating material or a fiber heat insulating material;
  • the reflective heat insulating layer 5 is made of a reflective heat insulating material, specifically an aluminum foil;
  • the heat dissipation plate 2 includes a composite aluminum plate and a composite graphite sheet.
  • the heat insulating material is selected from the group consisting of a porous heat insulating material, specifically, one of diatomaceous earth, expanded vermiculite, expanded perlite, foamed clay, and microporous calcium silicate.
  • a gap is provided between the panel 1 and the heat sink 2, and the cushion cotton 8 is laid flat in the gap.
  • a protrusion 9 is provided in the inner hole of the support frame 7 for carrying the panel 1 and the heat dissipation plate 2, so that the panel 1 and the heat dissipation plate 2 are fixed to the convex portion by double-sided adhesive bonding.
  • the thickness of the cushion cotton 8 is equal to the thickness of the projection 9, and the side surface of the cushioning cotton 8 facing away from the panel 1 is in contact with the surface of the side opposite to the heat dissipation plate 2 and the panel 1.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种包含有机发光器件的显示装置，包括支撑框架（7）以及设于支撑框架（7）中的面板（1），还包括用于有机发光器件的散热结构，散热结构包括散热板（2），散热板（2）的一侧表面设有用于隔离有机发光器件的驱动电路（6）热量的隔热层（3）；散热板（2）设置在支撑框架（7）中并且与面板（1）相对设置，隔热层（3）设置在散热板（2）背离面板（1）的一侧表面上，散热板（2）构成显示装置的后盖，面板（1）的柔性线路板弯曲至隔热层（3）背离面板（1）的一侧表面。使柔性线路板上的驱动电路（6）所发出的热量不会传导至有机发光器件，避免柔性线路板的驱动电路（6）散热的热量引起有机发光器件亮度不均的问题，延长有机发光器件的使用寿命。

Description

用于有机发光器件的散热结构及显示装置 技术领域
本发明涉及一种有机发光器件技术，特别是一种用于有机发光器件的散热结构及显示装置。
背景技术
有机发光(OLED)器件(OLED)由于同时具备自发光，不需背光源、对比度高、厚度薄、视角广、反应速度快、可用于挠曲性面板、使用温度范围广、构造及制程较简单等优异之特性，被认为是下一代的平面显示器新兴应用技术。
OLED器件的结构是由阳极(ITO)、阴极以及夹在两者之间的有机功能层构成。其中的有机功能层包括HIL、HTL、EML、ETL等层构成。
为了扩大有机发光器件的应用范围并将有机发光器件商业化，已经发展增加该有机发光器件的效率和降低驱动电压的技术。
但是OLED器件受温度影响很大，在将OLED器件作为面板制作成电视后，由于OLED器件在遇到热源会加速OLED器件的老化；其中最大的热源来自于驱动电路部分，一般驱动电路承载于柔性线路板上。目前OLED电视的后盖一般是散热材料，通过将柔性线路板弯曲至后盖背离面板的一侧，从而避免热量传递到面板上，而且散热材料有利于内部热量散发，但仍无法避免驱动电路部分热量对OLED器件的影响，长时间使用后，临近驱动电路部分的OLED器件亮度会低于其他区域，从而影响显示效果。
发明内容
为克服现有技术的不足，本发明提供一种用于有机发光器件的散热结构及显示装置，从而延长有机发光器件的使用寿命。
本发明提供了一种用于有机发光器件的散热结构，包括散热板以及设于散热板的一侧表面用于隔离有机发光器件的驱动电路热量的隔热层。
进一步地，所述隔热层包括绝热层和/或反射绝热层。
进一步地，所述隔热层包括绝热层和反射绝热层。
进一步地，所述绝热层由绝热材料制成。
进一步地，所述绝热材料为多孔型绝热材料或纤维型绝热材料。
进一步地，所述反射绝热层由反射型绝热材料制成。
进一步地，所述反射型绝热材料为铝箔。
进一步地，所述绝热材料为多孔型绝热材料，多孔型绝热材料为硅藻土、膨胀蛭石、膨胀珍珠岩、发泡粘土和微孔硅酸钙中的一种。
本发明还提供了一种显示装置，包括支撑框架以及设于支撑框架中的面板，还包括所述的用于有机发光器件的散热结构，所述散热层设置在支撑框架中并且与面板相对设置，所述隔热层设置在散热层背离面板的一侧表面上，所述散热层构成显示装置的后盖，所述面板的柔性线路板弯曲至隔热层背离面板的一侧表面。
进一步地，所述面板由有机发光器件构成。
本发明与现有技术相比，通过在散热板背离有机发光器件的一侧表面设置绝热层，对弯曲至散热板背离有机发光器件一侧表面的柔性线路板与散热板进行隔离，使柔性线路板上的驱动电路所发出的热量不会传导至有机发光器件，避免柔性线路板的驱动电路散热的热量引起有机发光器件亮度不均的问题，延长有机发光器件的使用寿命。
附图说明
图1是本发明用于有机发光器件的散热结构的结构示意图；
图2是本发明显示装置的结构示意图。
具体实施方式
下面结合附图和实施例对本发明作进一步详细说明。
如图1所示，本发明公开了一种用于有机发光器件的散热结构，包括散热 板2，在散热板2的一侧表面设有用于隔离有机发光器件的驱动电路热量的隔热层3，隔热层3与散热板2相互贴合在一起。
隔热层3包括绝热层4和/或反射绝热层5，当隔热层3包括一绝热层4和一反射绝热层5时，反射绝热层5位于绝热层4背离散热板2的一侧表面上，具体地，反射绝热层5的设置位置为与有机发光器件的驱动电路位置相对应处，其具体是设置在驱动电路与绝热层4之间，绝热层4与反射绝热层5将驱动电路夹在两者的中间，实现隔绝驱动电路发出的热量，避免热量传导至有机发光器件，若热量传导至有机发光器件，这样会对驱动电路所相对的这部分有机发光器件受热，加速了这部分有机发光器件的老化速度，使该部分与其余部分的亮度不同，从而出现亮度部均匀的问题，同时也会使这部分的使用寿命要短于其余部分。
本发明中绝热层4由绝热材料制成，具体为多孔型绝热材料或纤维型绝热材料；所述反射绝热层5由反射型绝热材料制成，具体为铝箔；散热板2包括复合铝板以及复合石墨片，采用层叠的方式设置；绝热材料选自多孔型绝热材料，具体为硅藻土、膨胀蛭石、膨胀珍珠岩、发泡粘土和微孔硅酸钙中的一种。
如图2所示，本发明还公开了一种显示装置，包括支撑框架7以及设于支撑框架7中的面板1，该显示装置还包括上述的用于有机发光器件的散热结构，其中：散热板2设置在支撑框架7中并且与面板1相对设置，隔热层3设置在散热板2背离面板1的一侧表面上，所述散热板2构成显示装置的后盖，其嵌入支撑框架7中，面板1的驱动电路6弯设置在隔热层3背离面板1的一侧表面，此处驱动电路6可设于柔性线路板上，通过柔性线路板弯曲至隔热层3背离面板1的一侧表面，使驱动电路6与隔热层3贴合。
本发明中，面板1由有机发光器件构成，至少包括三个发光单元。
隔热层3包括绝热层4和反射绝热层5，反射绝热层5设于隔热层3背离散热板2的一侧表面，由于反射绝热层5用于进一步隔离驱动电路6发出的热量，因此，发射绝热层5的面积小于绝热层4的面积，仅需要在具有驱动电路6的位置处设置即可，具体为，反射绝热层5的设置位置为与驱动电路6位置相对应，其具体是设置在驱动电路6与绝热层4之间，将驱动电路6夹在绝热层4与反射绝热层5之间，实现隔绝驱动电路6上的驱动电路发出的热量，避 免热量传导至面板1，由于面板是有有机发光器件构成，包括众多发光单元，而如果驱动电路的热量传导至位于该处的发光单元，会造成这部分发光单元受热，从而加速了这部分发光单元的老化速度，这样会造成面板1亮度不均匀的问题，降低面板1的使用寿命，因此通过隔绝驱动电路的这部分热量，能够避免热量的传导至面板1侧，延长了面板1的整体寿命。
绝热层4由绝热材料制成，具体为多孔型绝热材料或纤维型绝热材料；所述反射绝热层5由反射型绝热材料制成，具体为铝箔；散热板2包括复合铝板以及复合石墨片，采用层叠的方式设置；绝热材料选自多孔型绝热材料，具体为硅藻土、膨胀蛭石、膨胀珍珠岩、发泡粘土和微孔硅酸钙中的一种。
如图2所示，面板1与散热板2之间设置有间隙，在间隙中平铺有缓冲棉8。
如图2所示，支撑框架7的内孔中设置有一周凸起部9，用于承载面板1以及散热板2，从而使面板1与散热板2通过双面胶粘接固定在凸起部9的两侧表面上，缓冲棉8的厚度与凸起9的厚度相等，缓冲棉8背离面板1的一侧表面与散热板2和面板1相对的一侧表面贴合。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (17)

  1. 一种用于有机发光器件的散热结构，其中：包括散热板以及设于散热板的一侧表面用于隔离有机发光器件的驱动电路热量的隔热层。
  2. 根据权利要求1所述的用于有机发光器件的散热结构，其中：所述隔热层包括绝热层和/或反射绝热层。
  3. 根据权利要求2所述的用于有机发光器件的散热结构，其中：所述隔热层包括绝热层和反射绝热层。
  4. 根据权利要求2所述的用于有机发光器件的散热结构，其中：所述绝热层由绝热材料制成。
  5. 根据权利要求4所述的用于有机发光器件的散热结构，其中：所述绝热材料为多孔型绝热材料或纤维型绝热材料。
  6. 根据权利要求2所述的用于有机发光器件的散热结构，其中：所述反射绝热层由反射型绝热材料制成。
  7. 根据权利要求6所述的用于有机发光器件的散热结构，其中：所述反射型绝热材料为铝箔。
  8. 根据权利要求5所述的用于有机发光器件的散热结构，其特中：所述绝热材料为多孔型绝热材料，多孔型绝热材料为硅藻土、膨胀蛭石、膨胀珍珠岩、发泡粘土和微孔硅酸钙中的一种。
  9. 一种显示装置，包括支撑框架以及设于支撑框架中的面板，其中：还包括用于有机发光器件的散热结构，所述用于有机发光器件的散热结构包括散热板以及设于散热板的一侧表面用于隔离有机发光器件的驱动电路热量的隔热层，，所述散热板设置在支撑框架中并且与面板相对设置，所述隔热层设置在散热板背离面板的一侧表面上，所述散热板构成显示装置的后盖，所述面板的驱动电路设置在隔热层背离面板的一侧表面。
  10. 根据权利要求9所述的显示装置，其中：所述隔热层包括绝热层和/或反射绝热层。
  11. 根据权利要求10所述的显示装置，其中：所述隔热层包括绝热层和反射绝热层。
  12. 根据权利要求10所述的显示装置，其中：所述绝热层由绝热材料制成。
  13. 根据权利要求12所述的显示装置，其中：所述绝热材料为多孔型绝热材料或纤维型绝热材料。
  14. 根据权利要求10所述的显示装置，其中：所述反射绝热层由反射型绝热材料制成。
  15. 根据权利要求14所述的显示装置，其中：所述反射型绝热材料为铝箔。
  16. 根据权利要求13所述的显示装置，其特中：所述绝热材料为多孔型绝热材料，多孔型绝热材料为硅藻土、膨胀蛭石、膨胀珍珠岩、发泡粘土和微孔硅酸钙中的一种。
  17. 根据权利要求9所述的显示装置，其特征在于：所述面板由有机发光器件构成。
PCT/CN2017/092112 2017-06-26 2017-07-06 用于有机发光器件的散热结构及显示装置 Ceased WO2019000481A1 (zh)

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